Sensorless Control of IPMSM: Past, Present, and Future

Sul, Seung-Ki; Kim, Sung-Min

doi:10.1541/ieejjia.1.15

Cited by 72 publications

(18 citation statements)

References 41 publications

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“…Hence, position sensors such as rotary encoders or hole-effect sensors are used. Because position sensors have disadvantages such as reduced reliability and increased costs, many sensorless control methods have been proposed (1)- (7) . Generally, sensorless control methods of IPMSM utilize the back electromotive force (EMF) that is proportional to the motor speed (2) .…”

Section: Intoroductionmentioning

confidence: 99%

Audible Noise Reduction Method in IPMSM Position Sensorless Control Based on High-Frequency Current Injection

Tauchi

Kubota

2015

IEEJ Journal IA

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Methods for sensorless control involving the injection of a high-frequency signal into the low-speed range of an interior permanent-magnet synchronous motor (IPMSM) have been proposed. However, audible noise is a concern for these methods. We propose a method to reduce the audible noise due to a high-frequency current by minimizing the injection-signal amplitude suitable for IPMSM driving states.Keywords: audible noise, high-frequency, IPMSM, position sensorless control IntoroductionIPMSMs are often used in elevators, air conditioners, and HEVs because they are more compact and efficient as compared to induction motors. To drive an IPMSM, the pole position information is necessary. Hence, position sensors such as rotary encoders or hole-effect sensors are used. Because position sensors have disadvantages such as reduced reliability and increased costs, many sensorless control methods have been proposed(1)-(7) . Generally, sensorless control methods of IPMSM utilize the back electromotive force (EMF) that is proportional to the motor speed (2) . These methods become common technologies, and the microcomputer that automatically carries out a computation (current control(ACR), coordinate transformation, etc.) for the vector control by the embedded hardware in it is available (8) . When this microcomputer is used, the software to drive the IPMSM is only the estimation of the rotor position and the current command calculation.Methods based on back EMF presents good performance in middle and high-speed range drive of the IPMSM. However, they are not able to be applied to drive of the IPMSM at lowspeeds or standstill, because the back EMF is proportional to the motor speed. So, methods based on saliency of IPMSM have been proposed too (3)- (7) . These methods present good performance at standstill and low-speed range drive of the IPMSM. The saliency based sensorless methods have to inject high-frequency current (3) , high-frequency voltage (4)-(6) , or pulse voltage (7) . But, audible noise is a concern when a highfrequency signal is injected. In general, the high-frequency signal amplitude is maintained at a required constant value. This general approach makes a large audible noise.To solve the problem, a method to determine the highfrequency signal amplitude from experimental results has been proposed (9) . This method changes the injection signal amplitude within the range of the lower limit and the higher a) Correspondence to: Yuki Tauchi. E-mail: ce31054@meiji.ac.jp * Meiji University 1-1-1, Higashi-mita, Tama-ku, Kawasaki, Kanagawa 214-8571, Japan limit which are determined experimentally. At the transient state, the injection signal amplitude is increased to the higher limit in order that estimation performance does not deteriorate. At the steady state, the injection signal amplitude is decreased to the lower limit which does not depend on conditions such as rotational speed or load torque. In order to minimize the audible noise, the injection signal amplitude should be changed depending on conditions such as ro...

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Section: Intoroductionmentioning

confidence: 99%

Audible Noise Reduction Method in IPMSM Position Sensorless Control Based on High-Frequency Current Injection

Tauchi

Kubota

2015

IEEJ Journal IA

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“…In recent years, interior permanent magnet synchronous motors (IPMSMs) have been widely applied because of their high power density and high efficiency (1) . IPMSMs are also utilized as a source of power for battery-driven vehicles.…”

Section: Introductionmentioning

confidence: 99%

Position Sensorless Control System within Over-modulation Range Based on Mathematical Model Robust against Magnetic Saturation of IPMSMs

2017

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This paper proposes a position sensorless control system for interior permanent magnet synchronous motors (IPMSMs) within the inverter over-modulation range. In general, using the position sensorless control method in the middle-and high-speed regions requires q-axis inductance, which varies significantly owing to magnetic saturation. Therefore, parameter mismatch may occur, which decreases the motor efficiency and causes control system instability. Furthermore, in the inverter over-modulation range, the performance of the auto current regulator deteriorates significantly because disturbance components, which consist of low-order harmonic current components, are fed back to the controller. As a result, the operation range is not appropriately expanded if no measurements are obtained for these components. First, the robustness against magnetic saturation is increased by constructing a position sensorless control system based on the L d model. Next, a comb-filter-based harmonic current countermeasure method is proposed. The position sensorless control system can expand the operation range in this method. Finally, the effectiveness of the proposed control system is confirmed by several experiments.

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“…In recent years, Permanent Magnet Synchronous Motors (PMSMs) are successfully being applied to various fields such as railway vehicle, electric vehicle (EV), hybrid electric vehicle (HEV), electric appliance or industry fields for their compactness, high power density and high efficiency (1) (2) . Vector control is a most commonly used control method to operate PMSMs for accurate torque control and fast torque response.…”

Section: Introductionmentioning

confidence: 99%

Position Estimation System for PMSM Position Sensorless Control in Inverter Overmodulation Drive

Kondo

Doki

2017

IEEJ Journal IA

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This study investigates compensation methods for harmonic components to realize PMSM position sensorless control in inverter overmodulation drive. While applying PMSMs as traction motor motors in an EV or HEV, operating PMSM in inverter overmodulation drive is an effective method to widen high-speed drive region of PMSM and achieve fast torque response when voltage saturates because it enable to utilize 27% higher fundamental voltage as compared to linear drive. In addition, position sensorless control is regarded as an important technique for adding a fail-safe function and downsizing of the drive system. However, the harmonic components which are inevitably generated in inverter overmodulation drive have negative effects on closed current control and position estimation systems.The key to realize position sensorless control in inverter overmodulation drive is an appropriate compensation for the harmonic components in the input voltage and input current of a the position estimator. There are several methods to achieve this, and differences in position estimation performance possibly exist among these methods.In this study, the compensation methods for harmonic components in overmodulation drive are compared, and a suitable compensation method for sensorless control is investigated through an experiment.

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Sensorless Control of IPMSM: Past, Present, and Future

Cited by 72 publications

References 41 publications

Audible Noise Reduction Method in IPMSM Position Sensorless Control Based on High-Frequency Current Injection

Audible Noise Reduction Method in IPMSM Position Sensorless Control Based on High-Frequency Current Injection

Position Sensorless Control System within Over-modulation Range Based on Mathematical Model Robust against Magnetic Saturation of IPMSMs

Position Estimation System for PMSM Position Sensorless Control in Inverter Overmodulation Drive

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