New boards are here! New test motor is here! Very happy with the performance!
SM-1206 Rev A. 55 seconds test. 48Vin, 51Ain, 155A motor, 77C FET temp, 40% throttle, 2.1 Shaft HP. BLDC mode with current control. Noise at the end is the motor shaft coupling slipping, and I had to end the test.
Sampled current data for the motor under load.
Logic board with two switching modules and some makeshift heatsinks.
This is my current concept for the mechanical integration. I will need input to make the mechanical setup something that works with a wide variety of e-foil and jet-board thruster setups. The final assembly includes custom male-female bullets for stacking, and a capacitor board.
It seems that creating an apparatus to test a circuit board is significantly more difficult than creating the board itself. The latest drama is the shaft coupling is slipping above 6lbft (~150A), so I need to put the shaft back under the mill to add a keyway so I can push it harder.
Apparatus problems aside, this board has no trouble with 155A. I bet it would handle 200A for a 10-20 seconds, though that test will have to wait for next week. The temperature sensor is next to the FETs on the first switch module, and follows the thermal camera, so it seems good for safety and preventing fires.
The switch modules are designed to be stackable. This is TWO modules. If I added another switch module, we should expect 50% better performance. I would recommend people to use a number of switch modules based on application:
- Smaller people who use the VESC now but wish they had something better: 1 switch module
- Larger people, or daredevils: 2 switch modules
- e-surf, electric outdrive: 3 switch modules