Title :
Maximum Torque per Ampere (MTPA) Control of an IPM Machine Based on Signal Injection Considering Inductance Saturation
Author :
Kim, Sungmin ; Yoon, Young-Doo ; Sul, Seung-Ki ; Ide, Kozo
Author_Institution :
Sch. of Electr. Eng. & Comput. Sci., Seoul Nat. Univ., Seoul, South Korea
Abstract :
The aim of this study was to develop a new method to operate an interior permanent magnet synchronous machine (IPMSM) on the maximum torque per ampere (MTPA) condition. The characteristics of the MTPA condition were analyzed and the MTPA condition was derived based on the input electric power. The proposed method injects a small current signal used for tracking the MTPA operating point along with the fundamental current for torque generation. This method does not require any machine parameters or premade lookup table. The frequency of the injected signal is several hundred hertz, and the performance of the MTPA tracking is almost free from load torque disturbance. The feasibility of the proposed method was verified under various operating conditions with computer simulation and testing with an 11 kW IPMSM drive system.
Keywords :
machine control; permanent magnet motors; signal processing; synchronous motor drives; torque control; IPMSM drive system; MTPA operating point; computer simulation; computer testing; inductance saturation; input electric power; interior permanent magnet synchronous machine; load torque disturbance; maximum torque per ampere control; power 11 kW; signal injection; torque generation; Copper; Frequency control; Inductance; Reactive power; Stators; Torque; Vectors; Efficiency operation; interior permanent magnet synchronous machine (IPMSM); maximum torque per ampere (MTPA); signal injection;
Journal_Title :
Power Electronics, IEEE Transactions on
DOI :
10.1109/TPEL.2012.2195203
