Effect of Position Measurement Delay on the Performance of PMSM Drive

Singh, Anant K; Raja, R.; Sebastian, Tomy; Gebregergis, Abraham

doi:10.1109/ecce.2018.8558059

Cited by 8 publications

(3 citation statements)

References 16 publications

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“…P inv = P m + P loss (15) where P loss equals the sum of copper loss P Cu , iron loss P Fe , stray loss P str , and wind friction loss P f w . P loss = P Cu + P Fe + P str + P f w (16) Considering the temperature variation, the DC resistance of the stator windings can be represented as…”

Section: Torque Estimation Schemementioning

confidence: 99%

“…In reality, this assumption often proves inadequate due to variations in parameters, including current sensor errors [12,13] in inverters. Moreover, factors such as initial angle bias [14,15] in angle sensors and ADC sampling errors [16][17][18][19] contributing to dq-coordinate system position deviation further challenge parameter consistency. Additionally, fluctuations in stator resistance and magnetic flux linkage in motors, induced by temperature variations [20][21][22] during motor production or operation, present additional complexities.…”

Section: Introduction 1reasons and Key Considerationsmentioning

confidence: 99%

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An Accurate Torque Control Strategy for Permanent Magnet Synchronous Motors Based on a Multi-Closed-Loop Regulation Design

Ji,

Song,

et al. 2023

Energies

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Torque control accuracy is a significant index of permanent magnet synchronous motors (PMSMs) and affects the safety of many applications greatly. Due to the strong nonlinearity of the motor as well as the disturbance of non-ideal factors such as temperature fluctuation and the parameter error in field-oriented control (FOC), it is undoubtedly difficult to accurately control the actual output torque. Meanwhile, the parameter differences between motors and sensors during mass production and the assembly process affect the consistency of output torque and even increase the factory failure rate of the motor. No torque sensor is implemented due to the cost and limited space. Accurate estimation of the motor torque becomes essential to realize the closed-loop feedback for torque and improve the accuracy at a lower cost. In this paper, a look-up table (LUT) model that can reflect the nonlinear mapping relationship between power and torque is established based on numerous offline experiments, which avoids the calculation of complex losses. A multi-closed-loop control strategy is proposed to dynamically adjust the amplitude and angle of the preset current command, respectively, to improve the torque accuracy. The effectiveness of the strategy has been validated by experimental results.

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Section: Torque Estimation Schemementioning

confidence: 99%

Section: Introduction 1reasons and Key Considerationsmentioning

confidence: 99%

An Accurate Torque Control Strategy for Permanent Magnet Synchronous Motors Based on a Multi-Closed-Loop Regulation Design

Ji,

Song,

et al. 2023

Energies

View full text Add to dashboard Cite

show abstract

“…Specifically, a maximum speed of approximately 500 Hz is necessary in electric vehicle systems to achieve miniaturization and a high-efficiency drive motor. [14,15] Therefore, delayed components must be identified and compensated for secure precise torque control and performance in the weak magnetic flux region [16,17].…”

mentioning

confidence: 99%

High-Performance Permanent Magnet Synchronous Motor Control With Electrical Angle Delayed Component Compensation

Kim,

Park,

Kang

et al. 2023

IEEE Access

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Electrical angle delay resulting from inverter part and design errors causes rotor position errors. It significantly lowers motor control performance as the rotor position error rate increases owing to increased speed. Rotor position detections considering the delay component can be classified into initial rotor-position and time-delay position detections. The initial rotor position detection method causes initial rotor position errors based on speed because it does not consider the electrical angle delay component. The conventional time-delay position detection method involves currentvoltage time-delay position detection. The dynamo system manually measures and compensates for current and voltage delay coefficients based on speed to detect the time-delay position. However, achieving precise torque control performance is challenging because detecting the delay coefficient at high speeds is dangerous, and separating the electrical angle delay component is impossible. This study proposes a delay component detection and compensation algorithm by analyzing the electrical angle delay component due to inverter parts and design errors. The new initial rotor and time-delay positions are estimated to improve the torque control performance by compensating for the detected delay component. The proposed algorithm is based on the PMSM voltage equation and validated through simulation using MATLAB Simulink. The initial rotor position, time-delay position, and torque control performance are verified by experimentally detecting and compensating for the electrical angle delay component using the proposed algorithm. The results demonstrate that the proposed algorithm is robust to inverter part and design errors. Moreover, the proposed algorithm is advantageous in considerably improving the torque control performance. INDEX TERMSCurrent time delay, Delayed components, Electrical angle, Electrical angle offset, Initial rotor position, Permanent magnet synchronous motor, Time-delay position, Torque control, Voltage time delay I. INTRODUCTIONRecently, permanent magnet synchronous motors (PMSMs) have been widely adopted in mobile bodies, automobiles, agricultural machinery, and urban air mobility (UAM) fields owing to their high-power density advantages. In line with this trend, precise high-speed control of PMSMs is necessary for miniaturization and high efficiency. High-speed control of PMSM requires accurate rotor positioning and d-q axis vector control in the rotor position-aligned synchronous rotating frame [1][2][3][4][5][6][7].Typically, position sensors, such as resolvers, encoders, Hall sensors, and magnetoresistive (MR) sensors, are used to accurately detect rotor position. However, to design for rotor position detection, different circuit designs are required owing to type of sensors and filter time constants (caused by noise), which lead to design errors [8][9][10][11][12][13].Resolvers have hardware delayed components, such as filter and integrated circuit (IC) delays for excitation, sin, and cos signals, whereas encoders ...

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Influence of position and current sensor on torque ripple harmonic orders in electric drives

Singh,

Joseph,

Raja

et al. 2023

2023 IEEE Energy Conversion Congress and Exposition (ECCE)

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Effect of Position Measurement Delay on the Performance of PMSM Drive

Cited by 8 publications

References 16 publications

An Accurate Torque Control Strategy for Permanent Magnet Synchronous Motors Based on a Multi-Closed-Loop Regulation Design

An Accurate Torque Control Strategy for Permanent Magnet Synchronous Motors Based on a Multi-Closed-Loop Regulation Design

High-Performance Permanent Magnet Synchronous Motor Control With Electrical Angle Delayed Component Compensation

Influence of position and current sensor on torque ripple harmonic orders in electric drives

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