Improvement of Torque Accuracy of Interior Permanent Magnet Synchronous Motor Considering Temperature Variation

Kang, Dongkil; Hwang, Jaeyeob; Lee, Geun-Ho; Lim, Heesun; Jin, Wonjoon

doi:10.4283/jmag.2021.26.3.311

Cited by 1 publication

(3 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…To verify the validity of the proposed algorithm, the prewritten LUT at 30 • C, LUT interpolation at each temperature [8], algorithm 1 [5], algorithm 2 [9], and the current command to which the proposed algorithm is applied are compared.…”

Section: A Simulation Resultsmentioning

confidence: 99%

“…However, many experiments must be conducted to create an LUT for each temperature, resulting in time and material resource consumption. For this reason, [9] compensated for torque reduction caused by temperature changes of a motor based on a single LUT.…”

Section: Introductionmentioning

confidence: 99%

“…In [9], a torque command compensation technique using the change in the size of BEMF due to the change in magnetic flux was proposed by creating a LUT at intermediate temperature. Main idea of this is based on the change in the size of BEMF due to the change in magnetic flux.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

A Study of Reduced Torque Compensation Method Under Temperature Variation Based on Single Torque-Current Lookup Table

et al. 2023

View full text Add to dashboard Cite

In permanent magnet motors, the stator resistance and magnetic flux of the magnet change as the temperature increases. These changes result in a change in the maximum torque point per unit ampere (MTPA) of the motor. Without adequate compensation, this leads to a decrease in output torque. For this reason, look-up table (LUTs) are prepared over the temperature range and used for interpolation. This paper proposes a method to compensate for the output torque reduction due to a temperature increase using only a single LUT prepared at a base temperature. First, an estimation of the magnetic flux linkage and the output torque using a single LUT is performed. Second, the problem is modeled as a limited optimization problem to minimize the loss due to the torque reduction. The magnetic flux linkage and output torque are calculated in real time through the fundamental active power. The compensation value is calculated using the Lagrange multiplier method, an optimization technique, using the estimated magnetic flux linkage and output torque. The proposed method is verified by comparing it with other algorithms through simulation and experiment.INDEX TERMS IPMSM, permanent magnet motor, active power, reactive power, torque compensation, Lagrange multiplier method, torque control.

show abstract

Section: A Simulation Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%