To provide more starting torque in three-phase motors, the stator is connected in which configuration?

To provide more starting torque in three-phase motors, the stator is connected in which configuration?

• A. Multispeed configuration
• B. Shaded pole configuration
• C. Wye configuration
• D. Delta configuration

Answer: (D)

In three-phase motors, connecting the stator in a delta configuration is beneficial for providing increased starting torque. The delta connection allows each phase of the motor to deliver higher current at startup compared to other configurations, such as wye. This higher current flows in the stator windings, generating a stronger magnetic field which enhances the starting torque. In addition, delta configurations allow for lower impedance and facilitate a more direct route for the electrical current, further contributing to the torque generated during start-up. This is particularly essential for applications requiring immediate torque to overcome inertia and start movement efficiently. Other configurations, like the wye connection, typically result in higher phase voltages with lower starting torque, making them less effective for applications demanding high starting capabilities. Hence, the delta configuration stands out as the optimal choice for maximizing starting torque in three-phase motors.

In three-phase motors, connecting the stator in a delta configuration is beneficial for providing increased starting torque. The delta connection allows each phase of the motor to deliver higher current at startup compared to other configurations, such as wye. This higher current flows in the stator windings, generating a stronger magnetic field which enhances the starting torque.

In addition, delta configurations allow for lower impedance and facilitate a more direct route for the electrical current, further contributing to the torque generated during start-up. This is particularly essential for applications requiring immediate torque to overcome inertia and start movement efficiently.

Other configurations, like the wye connection, typically result in higher phase voltages with lower starting torque, making them less effective for applications demanding high starting capabilities. Hence, the delta configuration stands out as the optimal choice for maximizing starting torque in three-phase motors.