Study of speed sensorless permanent magnet synchronous motor (PMSM) control problem due to braking during steady state condition

Harini, Bernadeta Wuri; Subiantoro, Aries; Yusivar, Feri

doi:10.1109/qir.2017.8168479

Cited by 10 publications

(9 citation statements)

References 5 publications

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“…The synchronization loss detection mechanism used in the sensorless control system is shown in Figure 3. The system consists of two parts: the original sensorless control system [6] and the proposed synchronization loss detection system. The sensorless control system consists of: a. the motor used in this study, i.e., a PMSM with specifications as shown in Table 1, b. the observer used in this study, i.e., an MRAS to estimate motor speed, c. the current control used in this study, i.e., a Proportional Integral controller, and d. the motor speed control used in this study, i.e.,…”

Section: Methodsmentioning

confidence: 99%

“…In speed sensorless control systems in which the speed is estimated from stator current using the MRAS algorithm, a key problem is that the system is not able to detect synchronization loss that accompanies substantial increases in load, as illustrated [5] and experimentally demonstrated [6] by Harini et al ( , 2018. In their study, the load on the motor was increased substantially once motor rotation had stabilized at 90 RPM, so that it oscillated around speed 0 (i.e., the motor stopped).…”

Section: Introductionmentioning

confidence: 99%

“…In this paper, the proposed synchronization loss detection method for PMSM speed sensorless control systems is implemented experimentally. To this end, the Myway PE-Expert4 Digital Control System is used [6].…”

Section: Introductionmentioning

confidence: 99%

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A Synchronization Loss Detection Method for PMSM Speed Sensorless Control

et al. 2020

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Permanent Magnet Synchronous Motor (PMSM) is an AC motor in which the rotor must operate at synchronous speed in all load conditions. If the motor mechanical load increases, the motor can lose synchronization, stopping the motor. In sensorless control systems, i.e., those without speed sensors, the speed is estimated from the stator current using the Model Reference Adaptive System (MRAS) algorithm. Because such systems therefore cannot detect the loss of synchronization, it is necessary to design a synchronization loss detection system. Here, another speed estimation calculated from the stator currents and voltages is introduced. The speed is called a calculated speed. In the normal condition (synchronous condition), estimated speed and calculated speed will be approximately equal. However, when synchronization loss occurs, these two speed values diverge. On the basis of this phenomenon, a synchronization loss detection algorithm and method are developed. The algorithm’s speed-delta boundary values and detection period must be determined. The greater the setpoint speed, the higher the speed-delta boundary values but the smaller the detection period. The experiments confirm that the proposed algorithm is able to effectively detect the occurrence of synchronization loss.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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A Synchronization Loss Detection Method for PMSM Speed Sensorless Control

et al. 2020

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“…Electronics 2019, 8, x FOR PEER REVIEW 2 of 13 position [7][8][9][10][11]. In the sensorless control method, the stator current is measured to estimate the speed of the motor.…”

Section: Control Unit For Pmsmmentioning

confidence: 99%

“…In conventional position sensorless permanent magnet (PM) machine drives, the rotor position is obtained from the phase-locked loop (PLL) with the regulation of spatial signal in estimated back electromotive force (EMF) voltages. Due to the sinusoidal distribution of back-EMF voltages, a small-signal approximation is assumed in the PLL in order to estimate the position [7][8][9][10][11]. In the sensorless control method, the stator current is measured to estimate the speed of the motor.…”

Section: Introductionmentioning

confidence: 99%

Measurement of the PMSM Shaft Position with An Absolute Encoder

Rudnicki

2019

Electronics

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The most critical aspect of assessing a permanent magnet synchronous motor is the problem of correctly measuring the position of the synchronous motor shaft. The purpose of this article was to show the effects of employing an absolute encoder to control a synchronous motor with permanent magnets while encountering disturbances. This problem is often overlooked, but it appears from time to time. The correct measurement of the shaft position eliminates improper motor operation characterized by jerking. The article showed that despite momentary erroneous readings of the shaft’s position, it was still possible to control the permanent magnet synchronous motor (PMSM). This also allows for correct measurement of the motor speed. This paper originally proposed an adaptive correction method for a rotary encoder.

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The effect of multiple changes in motor parameter values simultaneously on the PMSM speed sensorless control system

Harini¹

2022

AIP Conference Proceedings

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One of the weaknesses in controlling the motor speed with the sensorless control method is the motor parameter values must be known precisely. The values of these motor parameters are inputted into the controller program. If the motor parameter values on the controller differ from the actual motor parameter values, it will cause errors in motor speed. The motor that is used is Permanent Magnet Synchronous Motor (PMSM). This study investigated the effect of more than one parameter values differences simultaneously. The motor parameters that are used in the sensorless control system are stator resistance, stator inductance, and magnetic flux. The combination of more than one parameters change in controller that can still reach the reference speed are:

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Study of speed sensorless permanent magnet synchronous motor (PMSM) control problem due to braking during steady state condition

Cited by 10 publications

References 5 publications

A Synchronization Loss Detection Method for PMSM Speed Sensorless Control

A Synchronization Loss Detection Method for PMSM Speed Sensorless Control

Measurement of the PMSM Shaft Position with An Absolute Encoder

The effect of multiple changes in motor parameter values simultaneously on the PMSM speed sensorless control system

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