Analysis of transient temperature field of five-phase induction motor with composite winding under different operating conditions

Abstract

Temperature rise of the multiphase motor is closely related to its operating condition and winding connection mode. When the motor is in overload and fault-tolerant operation, the unbalanced winding current may lead to the local overheating of the winding, which threatens the safe operation of the motor. In order to reveal the heating state in the five-phase induction motor with compound winding under different operating conditions, a new star-pentagon compound winding was constructed based on the conventional single-winding structure, and the electromagnetic loss of the studied motor with compound winding was calculated under different operating conditions by the field-circuit coupling method. On this basis, the three-dimensional fluid-thermal coupling model of the motor was established to calculate the transient temperature rise of the motor under normal working conditions and typical fault conditions of the winding. The temperature rise of the new five-phase induction motor with compound winding under different working conditions were determined, and the influence of operating conditions on the thermal performance of the motor were also obtained. The research results lay a theoretical foundation for the optimal design of multiphase motors and for further fault-tolerant control.

Keywords

• Five-phase motor
• Composite winding
• Transient temperature field
• Open-circuit fault
• Fluid-thermal coupling analysis