Which type of stepper motor allows the rotor to move freely when not energized, requiring continuous power to maintain its position?
A. Permanent magnet stepper motor
B. Variable reluctance stepper motor
C. Hybrid stepper motor
D. Unipolar stepper motor
Answer:B
Which type of stepper motor allows the rotor to move freely when not energized, requiring continuous power to maintain its position?
A. Permanent magnet stepper motor B. Variable reluctance stepper motor C. Hybrid stepper motor D. Unipolar stepper motor
Explanation: Variable reluctance stepper motors rely on the rotor aligning with the stator magnetic field through the principle of magnetic reluctance. They do not have a permanent magnet, and the rotor tends to move freely when not energized.