Hi Friends:
Customer received a 1000 W special charger from the end customer, the battery voltage from 28 V to 115 V, can be charged;
I have the following design ideas and would like to consult you:
Scheme 1: in the two-stage scheme, boost-pfc is used to increase the BUS to about 400 V, and then a phase shift full bridge is added to realize the output voltage from 28 V to 115 V
Disadvantages, duty cycle loss, wide voltage regulation, efficiency may not be high;Advantages low cost;Simple circuit;
Scheme 2: the two-stage scheme USES boost-pfc to increase the BUS to about 400 V, and USES double-tube flyback to realize the output voltage from 28 V to 115 V
Disadvantages: the lowest efficiency, the difficulty of EMI rectification and the lowest advantages and costs;Suitable for wide voltage regulation, simple circuit;
Scheme 3: in the three-stage scheme, boost-pfc is used to increase the BUS to about 400 V, and then one BUCK is added to adjust the voltage from 30 V to 120 V
Third stage fixed frequency LLC, only complete isolation, the first stage turn ratio 1:1
Disadvantages, complex circuit, the highest cost, advantages;The most efficient
Please evaluate the above three plans. Which one is the best?
Do you have a better plan?
Can you use the data power plan, for example: UCD3138;
Input |
Efficiency |
>85% |
Output |
Output Voltage (Min) |
28V DC |
Output voltage (Max) Constant voltage |
115V DC |
|
Output Current (Max) Constant current |
8.7A |
|
Output Current (Min) at max voltage |
3A |
|
Output current ripple |
+/- 0.5A |
|
Output power |
1000W |
|
Topology |
CC/CV |
|
Voltage/current control |
Input from BMS |
Input to control the operating voltage and current |
Protection |
Over Charge Shutdown |
>121.8V DC |
Over Temperature |
Shutoff output, automatic recovery |
|
Over Temp. Fault |
3.3V DC Signal |
|
Output Short |
Shutoff output, recover on re-power |
|
Output Short Fault |
3.3V DC Signal |
|
Environment |
Working Temperature |
-20C to 60C |
Working Humidity |
20% to 90% |
|
Storage Temperature |
-40C to 75C |
|
Storage Humidity |
10% to 95% |
|
Cooling |
Load Controlled Fan |
|
Options |
Enable/Disable |
|