Gen2/Motor Controller

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The motor controller takes power from DC battery bus, encoding three-phase sine waves to match the motor's position sensor to apply torque precisely to the motor.

Sevcon Gen4 Size 6 Controller Top
Gen2 motor controllers are all Sevcon Gen4 motor controllers, mostly Size 4 (S/DS) and Size 6 (SR/DSR), with Size 2 for the older XU model.
The sine waves are constructed by power transistors operating in a pulse-width modulation (PWM) capacity.
The power is applied to the motor in synchronization with the current speed and position of the rotor.
Controller alignment (motor commissioning) is the process of tuning all of this for maximum efficiency and to avoid any slippage.