This FNB43060T2 seems to be exactly what I need. It maybe overkill and need some extra discrete components when compared with L6234, but it will be a lot more simple than our current schematics. I will do some research and buy it. When I test it I will post the results. Thank you!
They are designed for 30kW industrial BLDC motors. Overkill is an understatement.
Please come back and post the design. Many people would be very happy to see the experimental setup. Hopefully it will look like something like the one below!
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Hi, i’ve this board, but i think that it has some problems, how can i test it?
You provide very little information.
Hi! I have the same hardware: a DRV8302 board, and I would like to use the 3 AD8605 current amplifier circuits. It was mentioned in the thread that the gain is supposedly 12.2, but I am getting different results. When I connect the output of a current amplifier to an STM32 ADC, I measure a gain of more than 100 when passing some current through the MOSFETs.
To test, I am using a lab power supply and a load (a motor). I send a PWM signal to one half-bridge (Phase A), set the other half-bridge to low (Phase B), and disable the last half-bridge (Phase C). To calculate the current from the ADC reading, I subtracted the offset (2048 for a 12-bit ADC) and then obtained the voltage. However, the result is more than 100 times the voltage across the 5mΩ shunt, while it should be around 12.2 times more.
I have checked the components on the dev board, and they all match the schematic uploaded above. Additionally, I am applying a 1.65V reference. I cannot figure out what might be wrong. I understand that the power supply current indicator might not be very precise, but the discrepancy is far too large.
Thank you in advance for your help.
Best regards!
I have been looking for a driver for a 24 VDC supply and about 12 Arms and 35 Apeak (short term). Then I noticed this driver board published five years ago, and it is still being sold from Aliexpress for about 40 Euro.
It seems that 6PWM is required from the MCU, so time delays needs to be implemented in software and hardware to avoid cross conduction of the half bridges. Furthermore three low-side shunts are used for measurement of currents.
Do the SimpleFOC software supports this?
Do you recommend some other driver with current sensors for this power range?