Deadbeat Model Predictive Current Control with Voltage Limits for Five-Phase SPMSMs

The reference voltage vector (VV) output by the deadbeat model predictive current control (DB-MPCC) method of the five-phase surface-mounted permanent magnet synchronous motor (F-SPMSM) can easily exceed the DC bus and PWM voltage limits, which will lead to a decrease in the dynamic response and stability of the F-SPMSM. This paper proposes a deadbeat predictive current control method with voltage limits (DB-MPCC-VL) method, which solves the problem that the output voltage of the controller is easy to exceed the limit, and improves the dynamic response and stability of F-SPMSM. First, according to whether the fundamental limit voltage can meet the fundamental current control requirements, the operating conditions of F-SPMSM are divided into three types. Then, according to the rule that the d1-axis current has a higher control priority, different DB control principles are designed for different operating conditions to maximize the dynamic response capability of the F-SPMSM control current while preventing the reference VV from exceeding the fundamental limit voltage. At the same time, the influence of the third harmonic reference VV on the fundamental limit voltage is considered by the third harmonic current control. Test results show that the proposed DB-MPCC-VL method can operate stably at the DC bus and SVPWM voltage limit, and the utilization rate of the SVPWM output voltage is close to 100%, which significantly improves the dynamic response and stability of F-SPMSM.