Energy Efficiency Improvement Using Simplified Dynamic Direct Voltage Maximum Torque Per Ampere Control for Interior PMSMs

An energy efficiency strategy is developed in this article using a simplified dynamic direct voltage MTPA speed control method for interior permanent magnet synchronous motors (IPMSMs). Finding an exclusive pair of the motor voltage angle and amplitude attains the MTPA trajectory tracking for each reference speed and/or torque condition, maintaining minimum current/power consumption and higher energy efficiency. This improvement is realized by taking into account the dynamic model of the motor, which makes the technology more precise in various operating conditions as contrary to existing literature. Further, the simplified dynamic strategy needs tuning of only couple of parameters compared to three times as much with the classical MTPA FOC technique. Moreover, a comparative study of the simplified dynamic direct voltage MTPA control methodology and the FOC strategy is carried out. Experimental outcomes and quantitative assessment prove that the simplified dynamic direct voltage MTPA control strategy is a worthy approach. Also, it is a substitution to the current MTPA methods and delivers higher efficiency for the IPMSMs' drive in modern industrial applications.

Automated summary

This article presents a simplified dynamic direct voltage MTPA speed control method for IPMSMs to develop an energy efficiency strategy. By finding an exclusive pair of the motor voltage angle and amplitude, the MTPA trajectory tracking is achieved for each reference speed and/or torque condition, resulting in minimum current/power consumption and higher energy efficiency. Experimental outcomes and quantitative assessment verify that this simplified dynamic control strategy is a worthy approach, delivering higher efficiency for IPMSMs' drive in modern industrial applications as a substitution to current MTPA methods.