Initial rotor position estimation for surface permanent magnet synchronous motor

Tanaka, Kõji; Yuzawa, T.; Moriyama, R.; Miki, Ichiro

doi:10.1109/icems.2001.971803

Cited by 8 publications

(13 citation statements)

References 5 publications

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“…Specifically, the maximum error is 2.1 and the average of the absolute value of the error over all measured angles is 0.7 electrical. Comparing the results to those documented in [1]- [9], the proposed method appears to provide a more accurate estimate of initial rotor position. The errors documented in [1]- [8] are on the order of 10 (electrical).…”

Section: Hardware Resultssupporting

confidence: 53%

“…The errors documented in [1]- [8] are on the order of 10 (electrical). The most accurate method [9] has an average error of 1.4 .…”

Section: Hardware Resultsmentioning

confidence: 98%

“…Substituting (6)-(8) into (1) and considering the torque to vibration signal path of Fig. 2, one can show that the currents of (6)-(8) yield sensor voltages of form (9) (10) (11) where and are the gain and the phase of at . It is noted that only the time-varying component of propagates to the sensor.…”

Section: Initial Rotor Position Detectionmentioning

confidence: 99%

“…Therefore, stator voltage is applied at a level sufficient to induce saliency through saturation of the core [6]- [9]. Specifically, the respective -and -axis have distinct saturation characteristics that lead to detectable position-dependent signatures in the stator current.…”

Section: Introductionmentioning

confidence: 99%

“…Research into initial position detection has focused primarily upon developing start-up routines wherein stator voltage is applied and the resulting stator currents are measured and used to estimate position [1]- [9]. In buried-magnet machines, the magnets introduce a saliency that yields position-dependent signatures in the stator current [1]- [5].…”

Section: Introductionmentioning

confidence: 99%

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Using torque-ripple-induced vibration to determine the initial rotor position of a permanent magnet synchronous machine

Pekarek

Beccue

2006

IEEE Trans. Power Electron.

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In this letter, a method of determining the initial position of the rotor of a permanent magnet synchronous machine is derived based upon signatures in torque-ripple-induced vibration. Although requiring a vibration sensor, the method requires no knowledge of machine parameters, is applicable to both surface-and buried-magnet machines, and can be used under no load. Hardware validation has been performed using a surface-magnet machine, wherein a maximum error of 2.1 (electrical) has been achieved using a start-up routine that requires 50 ms to complete.Index Terms-Initial position measurement, permanent magnet synchronous machines (PMSM), piezoelectric materials, torque measurement.

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Section: Hardware Resultssupporting

confidence: 53%

“…The errors documented in [1]- [8] are on the order of 10 (electrical). The most accurate method [9] has an average error of 1.4 .…”

Section: Hardware Resultsmentioning

confidence: 98%

Section: Initial Rotor Position Detectionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Using torque-ripple-induced vibration to determine the initial rotor position of a permanent magnet synchronous machine

Pekarek

Beccue

2006

IEEE Trans. Power Electron.

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Review of sensorless control techniques for PMSM drives

Wang

Chen

2019

IEEJ Transactions Elec Engng

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Permanent magnet synchronous motor (PMSM) drive systems have been increasingly applied in all kinds of high-power AC drives because of their inherent advantages of good performance, rapid dynamic response, as well as high reliability and efficiency. Precise control of the system traditionally depends on the shaft encoder, but the presence of the encoder could result in increased cost and volume, reduced reliability, etc. Therefore, the development of sensorless control techniques is important to avoid the above issues by the elimination of the sensor. Based on the running process of the motor, sensorless control techniques can be classified into four categories: initial position detection methods (IPDMs), low-speed control strategies, mid-high-speed control strategies, and full-speed control strategies. The fundamental principles, their advantages and disadvantages, the control precision, and the application range of these strategies on surface and interior permanent magnet synchronous motors (SPMSMs, IPMSMs) are described in detail in this paper. Finally, the development trend of PMSM sensorless control technologies is discussed. Initial position detection methodsThe initial rotor position is very crucial to the motor starting process by FOC. If the initial position is not accurate, many problems will be caused, such as excessive starting current, small starting torque, reverse rotating, or even start-up failures. At present, according to the motion state of the rotor in the detection process, IPDMs are divided into initial position identification methods with the rotor rotating, and initial position identification methods with rotor at standstill. The former is generally applied to the starting process of applications demanding low steadiness, such as pumps and fans, while the latter is mainly applied to cranes, electric vehicles, and elevator traction machines, which demand stringent requirements for riding comfort. Initial position identification methods with rotor rotatingThe presetting method is the simplest initial position identification method and utilizes the electromagnetic torque caused by the given current to pull the rotor to the fixed location [9][10][11][12]. The process of identification of the rotor's initial position based on the presetting method is shown in Figure 1. In addition, the method is independent of saliency, so it is suitable for both of SPMSM and IPMSM.T e = 1.5p(ψ f i s * sin( θ) + (L d − L q )i 2 s * sin( θ) cos( θ)) (1)

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A high frequency SIMULINK model for PMSM for a new sensorless rotor detection technique

Zhu

2007

Australian Journal of Electrical and Electronics Engineering

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A new concept of high frequency small-signal phase inductance (L ss ) of Permanent Magnet Synchronous Motor (PMSM) is defi ned in this paper. The L ss of a Soft Magnetic Composite (SMC) motor was mapped in the experiment and the results were used to build a high frequency SIMULINK model for the simulation of a new sensorless rotor detection scheme. A new sensorless detection scheme is also proposed in this paper. "A high frequency SIMULINK model for PMSM for a new sensorless rotor…" -Chandru and Zhu

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Initial rotor position estimation for surface permanent magnet synchronous motor

Cited by 8 publications

References 5 publications

Using torque-ripple-induced vibration to determine the initial rotor position of a permanent magnet synchronous machine

Using torque-ripple-induced vibration to determine the initial rotor position of a permanent magnet synchronous machine

Review of sensorless control techniques for PMSM drives

A high frequency SIMULINK model for PMSM for a new sensorless rotor detection technique

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