Design for the Interior Permanent Magnet Synchronous Motor Drive System Based on the Z-Source Inverter

Abstract

The permanent magnet synchronous motor (PMSM) running above the base speed requires flux-weakening control, which is usually realized by the direct-axis demagnetization current generated by the vector control, thus leading to a decrease in the system efficiency in the flux-weakening region. In addition, the motor power output range is limited by the inverter output voltage and current level. In this paper, a Z-Source drive PMSM control system with adjustable DC-link voltage was proposed to improve the efficiency of the motor system. The proposed system was experimentally verified. The response time of DC-link voltage is 10 ms and the overshoot is 3%, indicating good dynamic characteristics. Compared with the flux-weakening scheme, the Z-Source inverter scheme can achieve higher efficiency (about 3%) when the PMSM speed was set to 650 r/min.

Review of Permanent Magnet Synchronous Motor Fed by Multilevel Inverter

“…This scheme provided extended motor speed to the deep FW region without violating the maximum load angle condition. In [72], Shuai Dong et al designed a Z-source inverter for FW control of IPMSM drive with adjustable DC-link voltage to increase speed beyond base speed and enhance the system capacity. This system indicated good dynamic characteristics and achieved high efficiency.…”

Archives of Electrical Engineering

“…The analysis showed a high value of the THD coefficient for the supply current. In the case of supplying PMSMs by inverter-equipped systems one usually observes a high content of odd harmonics, that is 5, 7, 11 and 13 [22][23][24][25].…”

Evaluation of three consumers' contribution to the current and voltage distortions at the point of common coupling

“…One of the technical measures allowing reducing the energy intensity is the use of variable-frequency drives based on semiconductors [12], [13] with control systems that increase the energy efficiency of an automatic electric drive [14]- [16]. However, highlighting the obvious advantages of this type of equipment [17], [18], it is possible to miss the issues of the electrical energy quality [19].…”