Elevators were operated by elevator operators using a motor controller.

A contactor and electronic motor controller are typically mounted to the same plate.

Setting the motor controller to give the maximum power until he released it, Tom hastened to the gas-generating apparatus.

An automatic motor controller may also include limit switches or other devices to protect the driven machinery.

The interface for the motor controller is based on a RS-232 serial port.

The motorman regulated the motor controller that again magnetized the motors.

Three of the cabinets contained the motor controllers, one controller for each motor, the other two the digital reading system.

In 2001, among other equipment, motor controllers and computer systems were added.

The San Diego crew's motor controller burned out two weeks before the flight and had to be replaced.

In some motor controllers, a H-bridge is used to control the direction the motor turns.