Controlling Actuators

Question 1

Device that turns energy (typically electrical) to motion

Answer 1

Actuators

Question 2

5 Features of Actuators

Answer 2

• Force
• Speed
• Torque
• Power
• Efficiency

Question 3

• Force is produced due to the
  electric current in a wire inside a magnetic field.
• Proportional to the current, therefore can be controlled by
  potentiometer
• Hard to control
  precisely

Answer 3

DC motor

Question 4

When _____ passes through a coil in a/an _____, the magnetic force produces a torque which turns the dc motor

a. power, inductor
b. power, magnetic field
c. electric current, inductor
d. electric current, magnetic field

Answer 4

d. electric current, magnetic field

Question 5

• A DC motor with a control
  circuit
• Are controlled by PWM through the control pin

Answer 5

Servo motors

Question 6

Motor controlled by a series of electromagnetic coils

Answer 6

Stepper Motors

Question 7

Two basic types of Stepper Motors

Answer 7

• unipolar
• bipolar

Question 8

On a stepper motor, the coils are alternately given current or not, creating magnetic
fields which repulse or attract the magnets on the shaft,
causing the motor to rotate.

True or False?

Answer 8

True

Question 9

In a Unipolar stepper motor, 3 digital pins
required to control
the motor.

True or False?

Answer 9

False. Correct answer: Four digital pins