Sensorless Control of Planar Switched Reluctance Motors Based on Voltage Injection Combined With Core-Loss Calculation

• Published in: IEEE transactions on industrial electronics (1982) Vol. 67; no. 7; pp. 6031 - 6042
• Main Authors: Chen, Nan, Cao, Guang-Zhong, Huang, Su-Dan, Sun, Jun-Di
• Format: Journal Article
• Language: English
• Published: New York IEEE 01-07-2020; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Commutation; Control systems; Core loss; Core-Loss calculation; Couplings; Electric potential; Estimation; Force; Inductance; Mapping; Mathematical analysis; planar switched reluctance motor (PSRM); position estimation; Position measurement; Position sensing; Pulse duration modulation; Reluctance; Sensorless control; Voltage; voltage injection; Windings
• ISSN: 0278-0046; 1557-9948
• DOI: 10.1109/TIE.2019.2946539

In this article, a position estimation method is proposed to realize sensorless control of planar switched reluctance motor (PSRM) with core loss. First, a square-wave voltage generated through bipolar pulsewidth modulation (PWM) is injected into the idle phase of a PSRM, thereby generating core loss. The corresponding core-loss average power (CLAP), which contains position information, is calculated in real time. Then, depending on the six-phase CLAP, the initial position can be estimated for the PSRM startup. To stabilize the position estimation in different regions of pole pitches, position data measured in a long stroke are utilized to determine a function mapping from the CLAP with respect to position. Furthermore, a sensorless control system and commutation strategy are designed. Finally, the capability of different methods for position estimation and sensorless control of a PSRM system are experimentally investigated. The feasibility and effectiveness of the proposed method are verified through the experimental results.