Chargeur 48V 1600watts (sur base alim de serveur)

Ma batterie étant fixe sur le vélo ce serait plus pratique de pouvoir recharger rapidement sur les bornes alors j’ai acheté pour quelques dizaines d’€ une petite alimentation de serveur délivrant 30A de 42V à 56V dans le but de l’utiliser comme chargeur nomade.
Cette alimentation est disponible dans le même format en 1600W et 2900W mais ils annoncent la nécessité d’un disjoncteur 32A dans la doc lié au pic de courant lors du branchement pour la 2900W alors on va se contenter de la « petite » pour le moment ne souhaitant pas faire disjonncter toute les bornes de recharges classiques.
C’est une Emerson EPW30-48A (en 2900 watts EPW50-48A).
Elle ne dispose toutefois pas de régulation de courant, il va donc falloir bricoler un peu pour en faire un chargeur de 42-56V 3-30A  soit 1600 watts et ce pour ~2,5Kg.

Pourquoi celle-ci plus qu’une autre ?
- Je l'ai eu à pas trop chère.
- Des proportions correctes (pas un bloc de 40cm de long ou un pavé de 30x40 tout plat ou…)
- C'est assez gros (2 litres) mais pas trop pour être transportable. (pas comme ma 900watts MRGN-900 qui fait 20 litres)
- Sa masse est contenu, un peu plus de 2Kg (boitier en alu)
- Il y a une doc succincte. (La plupart rien vraiment rien)
- Elle démarre sans protocole particulier. (J’en ai déjà récupéré qui ne démarrait pas et sans doc ni schéma…)
- La plage de tension programmable correspond à ma plage d’utilisation (42-56V).
- Rendement ~95%
Un upgrade pour une version 2900 watts dans le même volume et probablement très similaire de conception a finalisé le choix.


PS : Finger out !
Mise en garde pour ceux que serait tenté de faire de même sans les connaissances et compétences nécessaires.
Ces alimentations comportent des zones particulièrement dangereuses en AC et avec du DC à plus de 300V,  ça ne pardonne pas.
Les étiquettes parfois présentent sur ce type d’appareil témoigne du risque et les zones dangereuses ne sont pas protégées/indiquées à l’intérieur sur les platines.
Même débranchées, elles peuvent rester dangereuses et il faut prendre les précautions en conséquence.

Intéressant !
L'alim de serveur n'est pas trop volumineuse ?

Non, pas trop au regard de la puissance
Dimensions (H × W × D): 88.2mm × 102.8mm × 242.3mm
On doit pouvoir gratter sur la longueur et elle fait environ 2 litres soit le double de ma 6A qui fait 175mmx92mmx62mm soit 1 litre.

Pin 5 et 6: Current limit

Peut être une solution simple pour être en CC/CV...

La doc n’est pas très clair mais il semble que ce soit plutôt une information sur la version d’alimentation 30 ou 50A ou que cela puisse être utilisé pour configurer une 50A en 30A. Il faut court-circuiter sur la 50A pour avoir les 50A sinon, elle limiterait à 30A ? ou se mettrait-elle en défaut ?

Doc Emerson a écrit:
Traduit du chinois :
pin5 and pin6 are used in the module output current limit function and module model reporting function. When pin5 and pin6 in inserting on the box back board short-circuit, the power source module according to the EPW50-48A external characteristic output, the module reported 0x02 (i.e. EPW50-48A(48V/50A)); When opening, the power source module according to the EPW30-48A external characteristic output, the module reported 0x01 (i.e. EPW30-48A(48V/30A)).

Document Traduit:
Pin5 and Pin6 are used to limit the output current and report module model. The module will output according to the external characteristic of EPW50-48A module and send “0x02” (EPW50-48A) to the monitoring module when the pin5 and pin6 are shorted from the back board on the subrack. Otherwise, the module will output according to the external characteristic of EPW30-48A module and send “0x01” (EPW30-48A) to the monitoring module.

En effet, ce ne sont pas des bornes de réglages de l'intensité... La tension de sortie se règle comment ?

Je ne sais pas encore, mais il doit bien y avoir une référence de tension.
pour régler de 42 à 56V dans la doc et je n'ai rien vu dans cette vidéo qui détail le démontage.

Elle ne semble pas trop compliqué pour activer la sortie...c'est déjà ça.

Il y a une liaison RS485 sur le connecteur, ce ne serai pas logiciel le réglage ? Je n'ai rien vu dans la doc mais elle est très succincte...

On en parle ici: http://pt.made-in-china.com/co_helm2015/product_Vapel-Power-Supply-50A-Rectifier-Epw50-48A_hogruougy.html

le monitoring se fait bien à priori par la RS485

Attention au piège lorsqu'on utilise une alimentation d'ordi ou similaire en guise de chargeur.

Un chargeur, c'est comme une "alim de labo", cela fait du CC pendant la montée de la tension, puis du CV.

Une "alim pas chère d'ordi ou de serveur", cela ne fait en général QUE du CV. Ce qui signifie que tant que le courant demandé est inférieur à celui spécifié, la tension de sortie demeure constante, et si le courant dépasse le seuil, la tension de sortie ne va pas "descendre gentiment" mais carrément couper, stop, mise en sécurité, fini.

Je me suis déjà fait "avoir" avec ce genre de truc.

A contrario, il m'est arrivé pour une tension élevée, de mettre une alim d'ordi en série avec une alim de labo, de manière à ce que cette dernière ajuste sa tension en CC. Le courant de l'alim de labo étant réglé sur une valeur inférieure à ce que l'alim d'ordi peut sortir, évidemment, sinon elle disjoncte.

C'est bien une des difficultés, il va falloir faire un peu de reverse...

moi même a écrit:
Elle ne dispose toutefois pas de régulation de courant, il va donc falloir bricoler un peu pour en faire un chargeur

Pas beaucoup de grain à moudre en attendant la livraison qui se fait un peu longue...
Il pourrait livrer à vélo chez Hermes

J'ai reçu la boite...
L'alim est vraiment super propre, elle semble neuve! Soit elle n’a pas beaucoup tournée soit elle était en environnement sans poussière.
Un comparatif avec ma 6A.

Elle fonctionne et a le ventre ouvert...
Il n'y a évidemment aucun réglage et tout se fait sur la carte de contrôle que j'ai désolidarisé avec beaucoup de mal.
14+14+10 connexions à dessouder en même temps, ça n'a pas été facile mais il n'y avait vraiment pas d'accès pour analyser et modifier.

C'est du multicouche et c'est dense.
La tache ne va pas être simple.



Ce serait quand même bien d'y arriver parce que c'est pas trop lourd non plus

Il faudrait vraiment trouver le schéma... ou au moins le format des commandes qu'elle comprend via la liaison RS485... Il y aurait peut être moyen de lui envoyer un réglage de la tension en temps réel pour asservir l'intensité...

HS: J'ai trouvé une alim de 1800W/48V pour 1,7 kg... et moins de 70€

Je l'ai eu à 20€ de moins...
Un schéma ou un doc technique plus détaillée aurait été bien mais n'ai pas trouvé de truc exploitable. Je me suis surtout soucié du fait qu'elle démarre sans une commande extérieure et que sa plage de tension coresponde à mon besoin.
Mon recablage pour accéder à la carte.


Un descriptif plus complet sous le lien de Silicium:
Le paragraphe 10 me semble intéressant.

Specification EPW30-48A a écrit:I. General
Input range 90-264VAC, 53.5VDC output, PFC, Self contains MCU and monitoring unit. The parameter can be output to or controlled by the supervisory monitoring unit through RS485. It features input over/under voltage protection, output over current protection, output overvoltage protection, output short circuit protection, N+1 redundancy and current sharing. It is in compliant with UL, TUV and CE.
II. Main Specifications
Model OutputVoltage(V) Output Current Range(A) Output Voltage Range(V) Ripple(p-p)
(Rated Load, Width Limited20MHz)
EPW50-48A 53.5 0—54.2 44—58 200mV
III. Quoted Standards
GB/T 2423.1-2001 Environmental testing for electric and electronic products—Part 2:Test methods—Tests A:Cold
GB/T 2423.2-2001 Environmental testing for electric and electronic products—Part 2:Test methods—Tests B:Dry heat
GB/T 2423.3-1993 Basic environmental testing procedures for electric and electronic products  Test Ca:Damp heat, steady state
GB/T 2423.4.1993 Basic environmental testing procedures for electric and electronic products  Test Db:Damp heat, cyclic
GB/T 2423.5-1995 Environmental testing for electric and electronic products—Part 2:Test methods —Tests Ea and guidance:Shock
GB/T 2423.6-1995 Environmental testing for electric and electronic products—Part 2:Test methods —Tests Ea and guidance:Bump
GB/T 2423.8-1995 Environmental testing for electric and electronic products—Part 2:Test methods —Tests Ed and guidance:Free drop
GB/T 2423.10-1995 Environmental testing for electric and electronic products—Part 2:Test methods —Tests Fc and guidance:Vibration(Sinusoidal)
GB/T 2423.11-1997 Environmental testing for electric and electronic products—Part 2:Test methods —Tests Fd and guidance:Random vibration wide band—General requirements
GB/T 2423.22-2002 Environmental testing for electric and electronic products—Part 2:Test methods —Tests N:Change of temperature
GB/T 14508-93 Mechanical environmental conditions existing in the cargo transportation by classed highway
EN55022:1998 Information technology equipment—Radio disturbance characteristics—Limits and methods of measurement
EN55024:1998 Information technology equipment—Immunity characteristics—Limits and methods of measurement
CEI IEC 61000-4-2 2001 Electromagnetic compatibility—Testing and measurement techniques—Electrostatic discharge immunity test
CEI IEC 61000-4-3 2002 Electromagnetic compatibility—Testing and measurement techniques—Radiated, radio frequency, electromagnetic field immunity test
CEI IEC 61000-4-4 1998 Electromagnetic compatibility—Testing and measurement techniques—Electrical fast transient/burst immunity test
CEI IEC 61000-4-5 1999 Electromagnetic compatibility—Testing and measurement techniques—Surge immunity test
CEI IEC 61000-4-6 2001 Electromagnetic compatibility—Testing and measurement techniques—Immunity to conducted disturbances, induced by radio-frequency fields
CEI IEC 61000-4-8 1993   Electromagnetic compatibility—Testing and measurement techniques—Power frequency magnetic field immunity test
CEI IEC 61000-4-11 1994 Electromagnetic compatibility—Testing and measurement techniques—Voltage dips short interruptions and voltage variations immunity test
CEI IEC 61000-4-29 2000 Electromagnetic compatibility—Testing and measurement techniques—Voltage dips short interruptions and voltage variations on DC input port immunity test
IEC 61000-3-2 2001 Electromagnetic compatibility—Limits for harmonic current emissions (equipment input current≤16A per phase)
IEC 61000-3-3 1995 Electromagnetic compatibility—Limitation of voltage fluctuations and flicker in low voltage supply systems for equipment with rated current≤16A
GB4943-2001 Safety of information technology equipment
YD/T 282-2000 General reliability test methods for communication equipment
GB/T 13722-92 Performance requirements and testing methods for power supplies used in the mobile communication
YD/T 732-95 Methods of measurement for DC-DC converter used in communications
YD/T 731-2002 High Frequency Switch-mode Rectifier for Telecommunication
IV. Environmental Conditions
No. Items Technical Specifications Unit Remarks
1 Operating Temperature -33 — +65 ºC -40ºC full load start up,+55~+65ºC derating 20% in linearity.
2 Storage Temperature -40 — +70 ºC
3 Relative Humidity 5—95 % No condensation
4 Altitude 0-4000 m derate 1ºC with every 200 meters' rising at 3000-4000m
5 Cooling Forced cooling, Draw air from the front and exhausts heat from the behind and this module has temperature-sensing timing function.

Remark: 1.-40 ºC in high voltage section(176Vac~290Vac), the PSU can start up at 2900W rated power.
        -40 ºC in low voltage section (90Vac~176Vac), the starting up voltage can't exceed 110Vac.
       2. .55ºC~65ºC, recommend that the module power derate, and the mode is automatic derating. If the module can't automatic derate, then it can output the maximum power at the 55ºC~65ºC, and don't have over temperature protection. It can operate normally when the component stress meet requirement.
          . 55ºC, the module can output the maximum power, and don't have over temperature protection, the module operate normally.
          . 65ºC, for the module with auto derate function, it can output at least 80% rated power for long time. For the module without auto derate function, the requirement of module is the same as  .

V. Electrical Characteristics
No. Item Technical Requirement Unit Remark
1,Input Characteristics
1.1 Rated input voltage 100—240 Vac Max AC input voltage 350VAC(static state),no damage to the unit for long time
AC Input voltage range 90—290
1.2 Frequency 47—63(typical50/60) Hz
1.3 PFC ≥0.99
Rated input, rated load
1.4 Power transformation point 160-175 Vac The details refer to power transform characteristic curve diagram
1.5 Max input current 18.5 A Low voltage full load
1.6 Inrush current - - Meet requirement:ETSI300132-3
2,Output Characteristics
2.1 Output voltage range adjustable 44—58 Vdc Operate through the monitoring unit (testing condition: empty load)
2.2 Rated output voltage -53.5 Vdc Input 220Vac
2.3 Output power 2900 W With 176-290Vac  input, 2900W output power can be attained
1200 W 90—175Vac input
2.4 Efficiency ≥92%
220Vac/ rated load
≥86%
rated load current
2.5 Temperature coefficient ≤±0.02 %/ºC
2.6 Ripple and noise ≤200 mVp-p Oscillograph band width is 20MHz.Parallel  10u+104 Capacitor with probe
2.7 Starting up output delay 3—8 S 42 VDC from rated input voltage to output voltage
2.8 Stand-by power consumption ≤6 W The awaken time of background turn off can't exceed 2S(full load test)
2.9 Turn on/off overshoot amplitude ≤±5 %
2.10 Dynamic response Overshoot range V:≤±5 % Load change at 25%—50%—25% or 50%—75%—50%, jumping rate is 0.1A/us; and the jumping period is 4ms; the two half periods are the same
Recovery time  t: ≤200 µS
2.11 Combined regulation ≤±1%
2.12 Current sharing imbalance ≤±5% % At the range of 50~100% load
2.13 Psophometrically weighted noise voltage ≤2 mV
2.14 Wide-band noise voltage ≤100 mV 3.4—150KHz
≤30 0.15—30000KHz
2.15 Discrete frequency noise voltage ≤5 mV 3.4—150KHz
≤3 150—200KHz
≤2 200—500KHz
≤1 500—30000KHz
3,Protection Characteristics
3.1 Input under voltage protection point ≤85 Vac Can auto recover, the load is 6A
3.2 Input under voltage recovery point ≤90 Vac The return difference ≥ 5V
3.3 Input over voltage protection ≥300 Vac Can auto recover
Output Current 0A(Test by AC SOURCE+ booster)
3.4 Input over voltage  recovery point ≥290 Vac The return difference ≥ 5V
3.5 Input over current protection              - - The AC input L and N wire have fuse
3.6 Output over voltage protection point 58.5—60.5 Vdc 1. The module internal fault lead to over voltage, the module locked itself.
2. add the voltage within the range of output over voltage protection  to the external module, then the module can operate normally
3.7 Output current limit protection point Details refer to output external characteristics - Can auto recover
3.8 Short circuit protection Endure long time short circuit without damage and auto recover.
3.9 Over temperature protection Auto-recoverable when temperature is less than 65ºC
1. Power convert characteristics curve
2. Rectifier output characteristics:
Curve of rectifier output characteristics
The shadow part of the above curve is current limiting area, the precision of the voltage and current of the above
curve ±5%
VI. Other Requirement
No. Item Requirement Remark
1 Acoustics noise ≤55dB A-weighted,test distance is 1 meter
2 Smell requirement Can't generate peculiar smell and unhealthy smell
3 Component requirement All components meet derating requirement
The  rated temperature of electrolytic capacitance ≥ 105ºC, and the electrolytic capacitance has 10 years life span in 40ºC sealed environment.
4 Hot swap The rectifier meet the hot swap requirement
5 Failure Isolation After the rectifier failure, it can detach from the system reliably.
6 Environment protection requirement Meet 2002/95/EC;
No cadmium, hydrid and fluorid; can't send out organic
Compound; no asbestos; the package material is recoverable.  
7 Blended applying compatible EPW50-48A meet compatible and replace EPW30-48A,EPW50-48A;When EPW50-48A and EPW30-48A is blended applying, they output current sharing according to equipower.
VII. Safety & EMC
No. Item Criterions Remark
1 Dialectical strength Input-output 3000Vac/30mA/ 1min No flyover, no breakdown. Feasible for test by equal DC Voltage

Input-ground 1500Vac/30mA/ 1min
Output-ground 500Vac/10mA/ 1min
2 Isolation resistance Input-output ≥10MΩ@500Vdc Under normal air pressure,humidity 90%,
Input-ground ≥10MΩ@500Vdc
Output-ground ≥10MΩ@500Vdc
3 Touch current (Input-ground) ≤3.5mA 264Vac/60Hz
4 Safety approval In compliant with UL,TUV and CE. IEC60950-1;UL 60950 -1;CAN/CSA-C22.2 No. 60950 -1; EN60950-1
5 EMC CE Input: CLASS B         6dB allowance
Output: CLASS  A     6dB  allowance EN55022
RE CLASS B  6dB allowance EN55022
EFT LEVEL 3 B IEC61000-4-4

LEVEL 4  B (difference mode2KV, common mode 4KV)
Output meet difference mode 2KV, common mode 4KV IEC61000-4-5
DIP Drop to 70%UT,duration 100ms,at angle  of 0°,45°,90°,135°,180°,225°,270°,315°, meeting class B.
Drop to 40%UT,duration 20ms,at angle of 0°,45°,90°,135°,180°,225°,270°,315°, meeting class B.
Drop to 0%UT,duration 10ms,at angle of 0°,45°,90°,135°,180°,225°,270°,315°, meeting class B.
Under other testing conditions all meeting class B. IEC61000-4-11

ESD For the shell which would be touched by human in the normal operation:IEC61000-4-2, contact discharge +/-6KV;air discharge+/-8KV  standard  B; (Power on when in test) IEC61000-4-2
For the shell which would be touched by human in the normal operation, contact discharge+/-8KV;air contact +/-10KV   standard  R.(power off when in test)
Signal terminal:contact discharge+/-2KV   standard  R;(power on in test,no test conducted to the Ground wire and current sharing wire)
CS Testing electric level 3V IEC61000-4-6
RS Testing electric level 10V/m IEC61000-4-3
Voltage fluctuation and flicker PST≤1.0;P1t≤0.65;relative voltage DC wave≤3%;The max DC wave ≤4%.The time of d (t) ≥ 3% is no more than 200mS. IEC61000-3-3
Current harmonic  CLASS A IEC 61000-3-2 [6]
6 Anti Lightning The AC input terminal can endure surge current wave of 5kA,8/20µS , 5 times each for positive and negative ,time cycle 1 minute.(refer to standard:YD 5098-2001).The module must pass anti-lighting test in power on condition and power off condition.
Performance criterion:
Criterion A: Performance is normal when meet the technical requirements;
Criterion B(DIP test criterion): The performance that can recover automatically when function degrade or lost temporarily ;
Criterion B (other test criterion except DIP) :The performance that can recover automatically when function degrade or lost temporarily ;But in the test, the output voltage must be kept in normal range.
Criterion C:auto-recover for short time function interruption allowable, long time of function interruption and recovery by hand script unallowable;
Criterion R:Any components damage except protection components unallowable, the testing pieces' performance can recover when replaces the damaged protection components.
VIII. Logical function and signal
No. Item Technique requirement
1 Input mode indication Indication light on the front board(green):The light is off when commercial electricity is unavailable (no AC input, AC over voltage, under voltage), output unavailable, otherwise the light is on.

2 Protection indication Indication light of alarm(yellow):temperature alarm,the light is on when remote turn off,otherwise the light is off.
3 Rectifier failure indication light on when there is unrecoverable failure occurs:
the light is on when overvoltage output,no output,fan failure,over temperature protection,otherwise the light is off.
4 Module coding When rectifier is inserted in the backplane,the monitoring function is open through the PIN,
Connect in series among the PIN with 100Ωresistance, PIN's connection to ground--GND(PIN16): "1" for connection, "0"for disconnected

IX. Environmental Testing Condition
No. Item Criterions Remark
1 High temp operation 65ºC Performance is normal for 24 hours
2 Low temp operation -33ºC Performance is normal for 24 hours
3 High temp storage 70ºC Normal mode available after two hours' recovery
4 Low temp storage -40ºC Normal mode availabe after two hours' recovery
5 Vibration Sine wave:
5~9Hz:
Vibration altitude 3.5mm;
9~200Hz:
Acceleration 10m/s2;
3 axis,sweep frequency vibrate for 5 times for each direction,1OCT/min
(1 time sound interval/min) Environment condition
Reference standard:ETS300019-2
Random vibration:
2~10Hz:
10m2/s3;
10~200Hz:
3m2/s3;
200~500Hz:
1m2/s3;
3 axis,30min for each direction Transportation environment condition
Reference standard:ETS300019-2
6 Shock Acceleration 250m/s2;pulse width 6ms;
3 axis 6 sides, each 500times Using environment condition
Reference standard:ETS300019-2
Acceleration 250m/s2;Pulse width 6ms;
3 axis 6 sides, each 500times Transportation environment condition
Reference standard:ETS300019-2
7 Drop Height 1m;bottom side once
8 HALT Low temperature stepping test  starting temperature:25ºC  step length:10ºC  holding time:10 minutes after temperature stabilization
requirement:power on/power off test at every temperature Low temperature-50ºC or failure appearance,find low temperature OL and DL
High temperature stepping test   starting temperature:25ºC    step length:10ºC   holding time:10 minutes after temperature stabilization
requirement:power on/power off test at every temperature High temperature 130ºC or failure appearance,find high temperature OL and DL
High/low temperature cycle test  temperature range:LOL*95%-UOL*95%   temperature change rate:60ºC/min
holding time:10 minutes after every temperature step stabilization. At least 5 temperature cycle
Vibration stepping stress test  starting stress:5G  stepping length:5G   holding time:10 minutes for every step Attain 45G or failure appears,find vibration OL and DL
Compound stress test(temperature cycle vibration)
temperature range:LOL*95%-UOL*95%  temperature change rate:60ºC/min
vibration stress:5 vibration grade (vibration acceleration= grade serial number*vibration breaking limit/5)
requirement: turn on, turn off test at every stress condition. Until all the samples are failure or the test time reach 24 hours

X. Current sharing performance
1.1 Current sharing design requirement
1,adopt average value current sharing between rectifiers, the specification requirement as follow:
(1) The linear relation between bus bar voltage of single rectifier and output current,the relational expression is: Vshare=C*Iout.
There into:Vshare is the voltage value of bus bar;Iout is output current value of rectifier;C is proportionality coefficient,set as 9.06/58(keep in step with EPW30-48A:C=5/32),when output current is 58A,bus bar voltage is 9.06V.Voltage design tolerance of bus bar is±0.1V.
(2) Adopt resistance-capacitance network tamper-proof at the external interface, at the same time, merge voltage regulator tube between the anode and the ground.
(3) Require bus bar isolation design,the fault of this module won't affect the normal operation of system;
(4) The imbalance increase when light load,maybe the module will be dieback,and there will be no output,the module require shield the abnormal alarm in this situation,(remark:there mustn't be dieback phenomenon when load is beyond10%)
(5) The dynamic waveform of rectifier is required between 25%~50% and 50%~75%,the slope is 0.1A/us; the first wave crest recovery time is 50us when the period is 4ms,the output overshoot is less than 5% rated voltage.
(6) Adjust range of module output voltage:the max value of adjusting range V1:-0.25V~-0.5V,voltage build up capability:0~V1;the max value of rise range V2:+0.25V~+0.5V,rise capability:0~V2.
1.2 Current sharing test requirement
1.2.1 Single rectifier test
(1).120% of max bus voltage is added to the current sharing bus, then test the waving value of the output voltage. The value should not exceed the combined regulation range of the rectifier.
(2).Dynamic performance test:20%~60%,30%~80%,40%~100% load jumping,0.1A/us slope coefficient,4ms period,meet dynamic response overshoot requirement.
(3).0~100% dynamic response test,load change cycle at 4ms,the recovering time should be less than 500uS,oscillatory occurrence is not allowed.
1.2.2 Parallel rectifiers test
(1) In the combination of all input voltage and output current,There should be no Low-frequency Oscillations in the output ripple when tested in operation;
(2) The current sharing tolerance tested at 50% and 100% rated load should meet the above-mentioned parameter in this specification.
(3) The overshoot in the output DC bus should meet the above-mentioned parameter in this specification under the following condition: cross load and input voltage on, swap of any rectifier; the combination of output DC current bus bar can't be less than 46VDC.
(4)  Dynamic response voltage of any extreme mode should meet the parameter of combined regulation in this specification
(5) When start at resistance load of 0%, 25%, 50%, 75%, 100%, the output voltage wave should be smooth.
(6) When higher specified rectifier module voltage, test power system voltage, power system voltage should neither higher than rated voltage nor overvoltage protection point.
(7) The rectifier inserts the module repeatedly. There can't be dieback caused by insertion.
XI. Communication function of rectifier and monitoring module.
Adopt RS485 communication method between rectifier and monitoring module (semi duplex, crewel); the communication protocol between module monitoring panel and monitoring module refer to <>
Adopt isolation design in the RS485 interface of rectifier,the power supply source of RS485 is +5Vdc,supplied by monitoring module.
CPU of rectifier must pass-48V power supply,when AC is power off, as long as the accumulator or other module are operation, the CPU of rectifier can operate still operate, which is convenient for detecting AC power off alarm.
The main monitoring information of rectifier includes:
1,electronic label: The manufacturer, time, barcode and model of rectifier.
2,voltage regulation, current regulation function:Meet the equalize charge and float charge requirement of accumulator; meet voltage regulation requirement.;
3, turn on, turn off control of single module;
4, alarm information:
Commercial power unavailable:commercial power failure(no AC input, over voltage and under voltage of AC input);
Module protection:temperature prediction alarm;
Module failure:output overvoltage turn off, fan failure, over temperature turn off or no output caused by other module internal reason;(long-distance turn off(the module is turn off or resting), commercial power failure won't give alarm to module failure).
XII. Mechanical Characteristics and Connector Definition
11.1 outline dimension(unit:mm)
L*W*H=(242.5+0.5)mm×(106.1+0.3)mm×(83.8±0.3)mm(Not including connector depth ,max)
11.2 Output connectors and PIN
Graph 1: Rear board
PIN definition:
Socket PIN Signal No. Insert order
AC input
FCI 51939-021 1 AC input L 2
2 Protection ground PE 1
3 AC input N 2
DC output and signal
FCI 51939-022 1 Address line ADDRESS0 3
2 Address line ADDRESS1 3
3 Module current share LOADSHARE+ 3
4 Inhibit INHIBIT 4(reserved)
5 Derate  1 Pin5 3
6 Derate 2 Pin6 3
7 Address line ADDRESS2 3
8 Address line ADDRESS3 3
9 Current share line LOADSHARE- 3(reserved)
10 RS485 power+ +5V 3
11 RS485 power- +5VGND 3
12 Communication wire RS485- 3
13 Address wire ADDRESS4 3
14 NC NC 3(reserved)
15 Communication wire RS485+ 3
16 Address wire GND ADDR_GND 3
See diagram Pre-charge Pre-Charge 1
See diagram Output 48V+ DC+ 2
See diagram Output 48V+ DC+ 2
See diagram Output 48V- DC- 2
See diagram Output 48V- DC- 1
remark:when pins 5,6 are short-circuit,the module full-load output;pins 5,6 are open circuit,the module derate to 30A output(EPW30-48A).
11.3 Others
No. Item   Criterions   Remark
1 Placement Level
2 Connection to ground Through case, front plane, consolidate screw and rack.
3 Material for case aluminum
4 Weight ≤2.5KG
XIII. Reliability Requirements
13.1  MTBF:(standard, environment temperature, load requirement):according to high-class products requirement of communication rectifier equipment stipulated by ministry of posts and Tele communication YD/T682-94,MTBF(mean time between failures)≥150,000 h. The product can endure environment change, such as over load, overheating, abrupt change of voltage .
13.2 Component:Famous brands were selected and derating was done to the electric stress and temperature stress, anti-instant change design was done to the critical component so as to ensure the reliability of the component.
13.3 Thermal design:Forced air-cooling system design and reasonable layout of component ensure the least temperature rise.
13.4 High endurance of Environment Design: Product meets requirements of different environments. It meets different of temperature and humility environments .Storage  temperature should be -40ºC—+70ºC, operational temperature -33 ~65ºC.
13.5 Electromagnetism immunity:The complexity of the power source network has been evaluated in the design of the power unit. Many methods have been designed to improve its immunity.
XIV. Remarks
       Dangerous power output , keep safe space when in operation!
        High Temperature Alarm Label
XV. Label

J’ai testé la fonction qui permet l‘équilibrage de charge entre les alim du paragraphe X.
Malheureusement elle agit trop peu avec une baisse de tension de l’ordre de 0,3V s’il y a demande de réduction de charge.
Ce qui est toutefois intéressant, c’est que la sortie fournit l’information du courant de sortie avec 5/32mV/A=0,156mV/A.

Fin d'expérimentation avec celle-ci...ça a fait boum en agissant en // d'une résistance.  
Le risque de l'expérimentation, parfois ça passe et parfois non...et sur ce genre de matos plutôt sensible. J'y suis allé trop fort
L'alim est bonne pour pièces...

Si je retente avec celle-ci, ce sera avec la 2900 watts

Ah crotte !!!  
Tout n'est pas perdu pour accéder à une charge rapide...

Regarde là: https://endless-sphere.com/forums/viewtopic.php?f=2&t=66169

rechercher 'APR48-3G' sur aliexpress...

Apparemment, elle ferait du cc/cv nativement... (edit: confirmé)

sur ce lien, j’utilise cette alimentation VAPEL pour recharger des batteries.
http://velorizontal.1fr1.net/t24145p775-engin-electric-de-l-iut-de-l-aisne-2019-reflexion-mobilite#649561

mais, j’ai acheté avec l’ajustement de la tension et du courant directement sur aliexpress
https://fr.aliexpress.com/item/4000439115414.html?spm=a2g0o.detail.1000060.2.191b78fbBzawsJ&gps-id=pcDetailBottomMoreThisSeller&scm=1007.13339.169870.0&scm_id=1007.13339.169870.0&scm-url=1007.13339.169870.0&pvid=c877aa80-c057-4cb5-8377-6e7e972425af&_t=gps-id:pcDetailBottomMoreThisSeller,scm-url:1007.13339.169870.0,pvid:c877aa80-c057-4cb5-8377-6e7e972425af,tpp_buckets:668%230%23131923%232_668%23808%233772%23232_668%23888%233325%2319_668%232846%238115%23889_668%232717%237558%23196_668%231000022185%231000066059%230_668%233468%2315612%23350

Pas mal l'alim en 0..60V 0..50A

Snickers à finalement fait le même chargeur que moi à partir d'une alim serveur eaton de 2kW:
https://vae-tech.forumactif.org/t126p50-chargeur-1800w-40-60v-et-15-kg-origine-serveur#1280

https://vae-tech.forumactif.org/t126p25-chargeur-1800w-40-60v-et-15-kg-origine-serveur#1178