ECE 148: ECE Elective 3 Topic 2B - Actuators Quiz

Brushless DC motors have a permanent magnet rotor and a coil wound stator.

The efficiency of brushless DC motors makes them less expensive.

A servo DC motor does not involve a control circuit and position sensing unit.

A commutator is a method of applying electrical current to the windings and produces a steady rotating torque by reversing the current direction.

Self excited DC motors are further divided into shunt, series, and compound types.

In a shunt wound DC motor, the speed stays constant and does not deviate with varying mechanical loads.

A series wound motor can only work with AC voltage supply.

Actuators turn electrical signals into physical outputs.

Sensors and actuators are essentially similar devices that perform opposite functions.

Most of today's robotic systems are powered by hydraulic actuators.

Actuators turn electrical signals from control modules into physical outputs.

Sensors and actuators are essentially the same devices with different functions.

Most of today’s robotic systems are powered by hydraulic actuators.