I have soldered the connectors on to the "Large DU Logic Board v6" and confirmed I can log in to it with 12V power.
I have gone through Damien's tests for the LDU and the values seemed to align with his video, so I'm hoping the DU is viable.
I am now preparing to spin it on the bench but want to make sure I am not going to make any sort of catastrophic error.
Parts List:
- Open Inverter “Large DU Logic Board v6”
- Sport LDU
- 100w 50 ohm pre-charge resistor from Amazon
- EV200 contactors from battery hookup (https://batteryhookup.com/products/te-c ... a-0-900vdc )
HV Power Source:
60V 5a benchtop power supply set to 40V and 5a current limit.
This is connected to B+ and B- through the EV200 contactors and the 100W 50ohm pre-charge resistor.
LV Power Source:
12V Car battery w switch and 5a fuse
Setup:
- Set benchtop voltage to 40V
- Set benchtop current limiting to 5amps
- Confirm ENCMODE to “AB”
(Set encoder mode to AB) - Confirm NUMIMP is 36
(Because Damiem says to) - Set UDCSW to 39 |
(using 39V since 40V is full voltage from benchtop power supply?) - Set UDCMIN to 38
(min voltage of 38 since benchtop power supply will be 40V?) - Set THROTMX to 10
(max 10% of throttle as a precaution) - Set TRIPMODE to 2
(In the event of an error, close the precharge contactor and open the main contactor. This helps protect the LDU as 0-"All Off" will kill it for sure if the error happens while its spinning.)
- I flip the 12V safety switch which sends 12V to the negative contactor and the inverter board.
The Inverter activates pre-charge resistor contactor and waits for inverter voltage (UDC) to exceed UDCSW (38V) . Then waits for me to press the start button. - I Press the start button. The Inverter closes main contactor and opens pre-charge contactor.
- I send 12V to the forward direction pin.
- I turn the potentiometer and the Inverter starts to spin (hopefully)
Questions:
- Does the above sound correct? or are there any other major steps & considerations I am leaving out?
- Will the benchtop power supply be able to spin the motor with 40V and 5a current limit?
- What potentiometer should I use to substitute the throttle for the sake of bench testing?
- Do I still need a 10kw heating element in parallel with all HV contactors etc for the sake of testing if I am using a benchtop power supply with current limiting?
- How do I safely discharge the inverter capacitors after testing is completed?
- Are those UDCMIN and UDCSW values ok? or do I need to set them to zero given the voltage I am using is so low. And if I must set them to zero, then does that mean I have to manage precharging myself (manually trigger the precharge and main contactors)?