Initial Rotor Position Detection for Sensorless Interior PMSM With Square-Wave Voltage Injection

For salient-pole permanent magnet synchronous motor (PMSM), the amplitude of extended back electromotive force (EEMF) is determined by rotor speed, stator current and its derivative value. Theoretically, even at extremely low speed, the back EEMF can be detected if the current in q-axis is changing. However, it is difficult to detect the EEMF precisely due to the current at low speed. In this paper, novel full-order multi-input and multi-output discrete-time sliding mode observer (SMO) is built to detect the rotor position. With the proposed rotor position estimation technique, the motor can start up from standstill and reverse between positive and negative directions without a position sensor. The proposed method was evaluated by experiment.

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“…Because the amplitude of EEMF changes with speed, normalization is adopted in the observer. The position error is shown as Equation (26).…”

Section: Full-order Sliding Mode Observer Designmentioning

confidence: 99%

“…The initial rotor position is achieved by initial rotor position Estimation [26]. During the startup process, the reference speed, measured speed, estimated speed, measured rotor position, estimated rotor position, phase current, electrical position estimation error and speed estimation error are shown in Figure 9.…”

Section: Start Up From Standstillmentioning

confidence: 99%

Full-Speed Range Encoderless Control for Salient-Pole PMSM with a Novel Full-Order SMO

Wang

Xie

et al. 2018

Energies

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“…The permanent magnet synchronous motor has the advantages of simple structure, low loss, high power factor and high efficiency, so it has been widely used in the fields of industrial robots, aerospace and other fields. In order to achieve high-performance control, it is necessary to accurately detect the initial rotor position [1][2][3][4][5][6][7][8][9]. The running performance of the motor will be decreased and a smooth start-up process will not be achieved unless the initial rotor position of the permanent magnet synchronous motor is accurate.…”

Section: Introductionmentioning

confidence: 99%

“…The running performance of the motor will be decreased and a smooth start-up process will not be achieved unless the initial rotor position of the permanent magnet synchronous motor is accurate. Therefore, the initial position of the rotor needs to be accurately estimated in order to realize the high-performance control [1][2][3][4][5][6][7][8][9].…”

Section: Introductionmentioning

confidence: 99%

Initial Rotor Position Detection for Permanent Magnet Synchronous Motor Based on High-Frequency Voltage Injection without Filter

Wang

Yao

Guo

et al. 2020

WEVJ

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The accurate initial rotor position of a permanent magnet synchronous motor (PMSM) is necessary for starting the motor, and for the position sensorless control method adopted by a PMSM control system under some working conditions. This paper presents a new method to detect the initial rotor position of a permanent magnet synchronous motor (PMSM). The method does not need a low-pass filter, and has strong robustness and a simple calculation method. According to the relationship between high-frequency current response and rotor position angle θ, the rotor position angle can be obtained by arctangent and linear formulae. Finally, the magnetic polarity of the rotor is distinguished according to the change of inductance. In this method, the arctangent function is used to eliminate the filtering process and reduce the influence of the parameter deviation of the motor system on the detection accuracy of the initial position. The experimental results verify the correctness of the theoretical analysis and the effectiveness of the method.

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“…Yoon et al [14], first put forward a square-wave injection for the purpose of extending the bandwidth of position estimation as well as the speed operation range. The injection frequency is up to a half of the switching frequency (in some literature this frequency equals the switching frequency [15]) [16] and a non-filter based HF separation methodology is adopted, instead of the BPF or HPF. Through, an improved dynamic within the full speed range is achieved, this method is susceptible to system noises and measurement errors.…”

Section: Introductionmentioning

confidence: 99%

High-Frequency Injection-Based Sensorless Control for a General Five-Phase BLDC Motor Incorporating System Delay and Phase Resistance

Tian

Molinas

2019

IEEE Access

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This paper investigates the sensorless control of a general Five-phase permanent magnet brushless DC (5-BLDC) motor working at the low speeds. High frequency (HF) injection-based sensorless control is most popular, however, the system delay and stator resistance could deteriorate the sensorless control performance. In this paper, an HF model of 5 BLDCs at frequency-domain is primarily established as a replacement over the conventional static model, and an interpretation from the sinusoidal internal model is carried out to direct the sensorless control implementation. Accordingly, the measured d-axis HF current, which is typically neglected in the conventional method, is reused to demodulate the position angular information from the measured q-axis HF current. The proposed sensorless control is performed on a 5 BLDC drive, and experimental results confirm the effectiveness of this method while comparing its performance with the conventional method. INDEX TERMS Sinusoidal internal model, high-frequency injection, five-phase BLDC motor, sensorless control.

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Initial Rotor Position Detection for Sensorless Interior PMSM With Square-Wave Voltage Injection

Cited by 37 publications

References 5 publications

Full-Speed Range Encoderless Control for Salient-Pole PMSM with a Novel Full-Order SMO

Full-Speed Range Encoderless Control for Salient-Pole PMSM with a Novel Full-Order SMO

Initial Rotor Position Detection for Permanent Magnet Synchronous Motor Based on High-Frequency Voltage Injection without Filter

High-Frequency Injection-Based Sensorless Control for a General Five-Phase BLDC Motor Incorporating System Delay and Phase Resistance

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