Temperature Estimation of IPMSM by Using Fundamental Reactive Energy Considering Variation of Inductances

Jung, Hyun-Sam; Kim, Hwigon; Sul, Seung-Ki; Berry, Daniel J.

doi:10.1109/tpel.2020.3028084

Cited by 25 publications

(6 citation statements)

References 31 publications

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“…The magnetic flux temperature coefficient A calculated through the experiment is approximately −0.103%/ • C, which is close to the usual value of NdFeB shown in Table 2. [3] λ abc = L abc I abc + φ fabc , where…”

Section: B Change In the Magnetic Flux Of Permanentmentioning

confidence: 99%

“…However, in Equation (1), φ f , L d and L q are functions of temperature, and the motors used in harsh thermal environments, such as vehicle traction motors, occur parameter fluctuations due to temperature changes [2], [3], [4]. Since the MTPA calculation method using the analytical technique considers the parameters as constants, it does not reflect the fluctuations in operating points due to parameter changes with temperature.…”

Section: Introductionmentioning

confidence: 99%

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

et al. 2023

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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.

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Section: B Change In the Magnetic Flux Of Permanentmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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

et al. 2023

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“…References in [61][62][63][64][65][66][67] exhibit methods based on the high-frequency injection for PM flux monitoring. References [68][69][70][71][72][73][74][75] are methods for PM flux monitoring without signal injection. References [76][77][78][79][80][81][82][83][84][85][86][87][88] are based on the resistance estimation for the temperature monitoring of PM machines.…”

Section: Research Trend For Extensive Monitoring For Pm Machinesmentioning

confidence: 99%

A Review of Thermal Monitoring Techniques for Radial Permanent Magnet Machines

Meng

Zhang

2021

Machines

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Permanent magnet machines are widely applied in motor drive systems. Therefore, condition monitoring of permanent magnet machines has great significance to assist maintenance. High temperatures are accountable for lots of typical malfunctions and faults, such as demagnetization of the permanent magnet (PM) and inter-turn short circuit of stator windings. Therefore, temperature monitoring of the PM and stator windings is essential for reliable operation. In this paper, an overview introducing and evaluating existing thermal monitoring methods is presented. First, the mechanism of thermal-caused failures for the PM and stator windings is introduced. Then, the design procedure and principles of existing temperature monitoring methods are introduced and summarized. Next, the evaluations and recommendations of application feasibility are demonstrated. Finally, the potential future challenges and opportunities for temperature monitoring of the PM and stator windings are discussed.

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“…These electrical model-based estimation methods can be classified into two types according to operating speed. Estimation methods in the medium-and high-speed regions exploit magnet flux linkage [11][12][13][14][15] or reactive energy [16][17][18][19], respectively. However, these methods cannot be applied where the motor's terminal voltages are insufficient due to operating at low speed.…”

Section: Introductionmentioning

confidence: 99%

Comparative Study of Magnet Temperature Estimation at Low Speeds Based on High-Frequency Resistance and Inductance

et al. 2023

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Interior permanent magnet synchronous motors have been widely used in electric vehicles. These motors employ Nd-Fe-B as the permanent magnet, which is vulnerable to temperature variations. Moreover, some features of Nd-Fe-B magnets are related to temperature, which can affect motor characteristics. Therefore, magnet temperature is an important parameter and methods for estimating it have been developed. In particular, a signal injection method has been developed for low-speed regions. In this method, two parameters are employed: high-frequency resistance and high-frequency inductance. In this paper, these two methods are compared to determine which parameter is more appropriate for estimations at low speeds and to reveal whether signal injection methods can be applied to the standstill condition. The comparison indicated that the high-frequency inductance-based method has a stronger correlation with the magnet temperature at low speed and standstill conditions than the high-frequency resistance-based method.

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Temperature Estimation of IPMSM by Using Fundamental Reactive Energy Considering Variation of Inductances

Cited by 25 publications

References 31 publications

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

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

A Review of Thermal Monitoring Techniques for Radial Permanent Magnet Machines

Comparative Study of Magnet Temperature Estimation at Low Speeds Based on High-Frequency Resistance and Inductance

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