What type of motor can reverse its rotation direction by swapping two power supply connections?

What type of motor can reverse its rotation direction by swapping two power supply connections?

• A. Split phase
• B. Capacitor-start, capacitor-run
• C. Permanent split capacitor
• D. Three-phase

Answer: (D)

The correct answer is three-phase motor. This type of motor is designed in a way that allows for the reversal of its rotation direction by simply swapping any two of the three supply connections. When two of the three phases are exchanged, the phase sequence is altered, which changes the direction of the rotating magnetic field produced by the stator. In contrast to three-phase motors, other types such as split phase, capacitor-start, capacitor-run, and permanent split capacitor motors typically do not have this capability. They generally have a specific wiring configuration that does not facilitate easy reversal by swapping connections. Instead, reversing these motors usually requires modifications to the internal wiring or the addition of a reversing switch that can be more complex and less straightforward than the simple process used with three-phase motors. This is why three-phase motors are often preferred in applications requiring frequent direction changes, as they provide a quick and efficient method for reversing rotation.

The correct answer is three-phase motor. This type of motor is designed in a way that allows for the reversal of its rotation direction by simply swapping any two of the three supply connections. When two of the three phases are exchanged, the phase sequence is altered, which changes the direction of the rotating magnetic field produced by the stator.

In contrast to three-phase motors, other types such as split phase, capacitor-start, capacitor-run, and permanent split capacitor motors typically do not have this capability. They generally have a specific wiring configuration that does not facilitate easy reversal by swapping connections. Instead, reversing these motors usually requires modifications to the internal wiring or the addition of a reversing switch that can be more complex and less straightforward than the simple process used with three-phase motors. This is why three-phase motors are often preferred in applications requiring frequent direction changes, as they provide a quick and efficient method for reversing rotation.