A new MTPA control strategy for sensorless V/f controlled PMSM drives

Abstract

This paper presents a new maximum torque per ampere (MTPA) control strategy for sensorless V/f controlled PMSM drives. The proposed theoretical basis can be applied to both surface permanent magnet synchronous motor (SPMSM) and interior permanent magnet synchronous motor (IPMSM) drives to obtain high efficiency. Two closed loops are required in the proposed drive. First, by using the oscillatory active power information, a load angle compensation component is generated to adjust the load angle to stabilize the system. Second, the drive imaginary power is regulated to follow the imaginary power of MTPA performance such that the drive can operate under the minimum copper loss condition in the steady state. The imaginary power controller can generate a voltage compensation component to properly adjust the drive voltage. Hence, the demanded MTPA performance is obtained. The provided simulation results show the performance and validity of the proposed strategy. The hardware implementation of the proposed control is now undertaking and the experimental results will soon be shown in the near publication. Index Terms-interior permanent magnet synchronous motor (IPMSM), maximum torque per ampere (MTPA), surface permanent magnet synchronous motor (SPMSM), V/f control

Maximum Torque per Ampere and Maximum Efficiency Control Methods based on V/f Control for IPM Synchronous Motors

“…(16) and (17). In another words, the characteristics of the MTPA in IPMSM are not evaluated practically in an experiment.…”

“…ac.jp * Nagaoka University of Technology 1603-1, Kamitomioka-machi, Nagaoka-city, Niigata 940-2188, Japan PMSM have been studied (14)- (17) . The V/f control method does not essentially require the information of the pole position because the control algorism is implemented on γδ-flame which the δ-axis corresponding to the output voltage vector of an inverter.…”

“…On the other hand, the MTPA control methods based on the V/f control have been investigated (16) (17) . The MTPA control method can be achieved by regulating the current phase to control the reactive power.…”

Neural network approach on loss minimization control of a PMSM with core resistance estimation

“…These studies were also based on a single method that included intensive analytical procedures, as in the previous research. In addition to studies that focused only on one method [25][26][27][28], there exist several studies [1,5,12,[29][30][31][32] that use the FW and MTPA strategies jointly. In these studies, the increase in performance using a combination of the two methods is apparent.…”

“…In that paper, highly complex analytical calculations were used and only the FW region was examined. A maximum torque per ampere (MTPA) strategy was used in [26][27][28] to reduce motor losses. These studies were also based on a single method that included intensive analytical procedures, as in the previous research.…”