A controller is used between the battery and motor to control the power and hence the speed and torque from the motor. On an EV the controller is equivalent to the fuel injection metering
system or carburettor on an internal combustion engine. The
controller regulates the amount of power the motor can draw from
the batteries. Modern controllers make use of solid-state power
electronics to achieve smooth variable speed operation of the
AC motors require an inverter to turn DC battery power into three-phase AC power. Our controllers include the inverter stage within the control unit. We source and supply a range to suit our AC motors.
DC permanent magnet motors use a different type of controller and we source and supply units to suit the PM motors we source and supply.
DC series wound motors are still used in some vehicles and we can source and supply control systems to suit the series wound motors we can source and supply.