From the given comparison, which motor type is identified as having greater starting torque than a shaded pole motor?

From the given comparison, which motor type is identified as having greater starting torque than a shaded pole motor?

• A. Shaded pole motor
• B. CSR
• C. PSC motor
• D. Three-phase motor

Answer: (C)

Starting torque depends on how the motor creates a rotating magnetic field at startup. Shaded pole motors use shading rings to form a partial rotating field, which is inherently weak and limits starting torque. A Permanent Split Capacitor (PSC) motor, on the other hand, includes a run capacitor that creates a phase-shifted current in an auxiliary winding. This produces a stronger, more effective rotating field right from the moment the motor starts, giving a much higher starting torque than a shaded pole motor. In this comparison, that increased starting torque is why the PSC motor is identified as having greater starting torque than the shaded pole motor.

Starting torque depends on how the motor creates a rotating magnetic field at startup. Shaded pole motors use shading rings to form a partial rotating field, which is inherently weak and limits starting torque. A Permanent Split Capacitor (PSC) motor, on the other hand, includes a run capacitor that creates a phase-shifted current in an auxiliary winding. This produces a stronger, more effective rotating field right from the moment the motor starts, giving a much higher starting torque than a shaded pole motor. In this comparison, that increased starting torque is why the PSC motor is identified as having greater starting torque than the shaded pole motor.