Position Sensorless Torque Control System of PMSM in Overmodulation Range

Asano, Daisuke; Lerdudomsak, Smith; Doki, Shinji; Okuma, Shigeru

doi:10.1109/ipec.2010.5544571

Cited by 6 publications

(3 citation statements)

References 7 publications

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“…References report an attempt to separate the low‐order harmonic current component is generated by the harmonic voltage in the overmodulation range. The harmonic current voltage is estimated using the motor model with an input harmonic voltage.…”

Section: Proposed Current Control System For Signal Injectionmentioning

confidence: 99%

An Adjusted Current Control System for Signal Injection‐Based Position Sensorless Control and Parameter Identification

Jung¹,

Ohnuma

Doki

et al. 2014

Electrical Engineering Japan

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SUMMARYThis paper proposes a current controller for signal injection-based control schemes such as those for parameter identification and position sensorless control. In a conventional current control system with voltage signal injection, the separation of the injected frequency components from the current is carried out by using band stop filters. However, the separation is not accurate, especially when the system is in the transient state and/or when the current controller bandwidth is close to the injected signal frequency. This leads to distortion of the transient response and affects the stability of the current control system. The proposed controller estimates the injected frequency components in the current on the basis of a motor model by using the injected signal as the input. Therefore, accurate signal separation is accomplished even in the transient state. The current controller's stability and dynamic performance are improved significantly. Experimental results are presented to validate the proposed method. Factors that play an important role in the implementation of the controller, such as time delay and parameter variation, are discussed.

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Section: Proposed Current Control System For Signal Injectionmentioning

confidence: 99%

An Adjusted Current Control System for Signal Injection‐Based Position Sensorless Control and Parameter Identification

Jung¹,

Ohnuma

Doki

et al. 2014

Electrical Engineering Japan

Self Cite

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“…The state equation is also given in (4). The parameter ' a' is the tuning parameter that adjust the dynamic response of estimation proposed in [13]. The author mentioned that the a can adjust a balance between steady-state estimation error and transient response.…”

Section: A Injectionfrequency Current Estimator Using Injection Signalmentioning

confidence: 99%

Adjusted current controller for signal-injection based control algorithms

Jung

Doki

Okuma

et al. 2011

IECON 2011 - 37th Annual Conference of the IEEE Industrial Electronics Society

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This Paper proposes current controller for signal injection based control schemes such as parameter identification and position-sensorless control. In conventional current control system with voltage signal-injection, the injected frequency cur rent separation is carried out by BSFs. However the separation is not properly conducted especially during transient state and when the current controller bandwidth is close to injection signal frequency. This distorts transient response and affects stability of current control system. The proposed method estimates the injected frequency current components based on motor model using the injection signal as an input. Therefore the precise signal separation is accomplished even in transient state. Moreover, cur rent controller's stability and dynamic performance are improved significantly. Experimental results are presented to verify the proposed method. Moreover, implementation issues such as time delay and parameters variation is discussed.

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“…There are various techniques that utilize the overmodulation region to maximize the output power through high utilization of the dc-link voltage [1]- [7]. A voltage amplitude compensator that employs an inverter gain [1], [2] and a current harmonic compensator for a pulse width modulation (PWM) drive in the overmodulation region [3] have been proposed. A fluxweakening control suitable for quasi six-step operation in the current control-based PMSM drives has been reported in [4].…”

Section: Introductionmentioning

confidence: 99%

Square-wave operation of direct torque controlled PMSM drive system

Inoue

Maeda

Morimoto

et al. 2013

2013 IEEE Energy Conversion Congress and Exposition

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This paper proposes a square-wave operation of permanent magnet synchronous motor drive system based on direct torque control. It is important to operate in the overmodulation region to maximize the motor output power. In the proposed system, the transition from the PWM drive to the square-wave drive is achieved by comparing the reference values of the stator flux-linkage. The reference values are calculated by the control laws of the maximum torque per ampere and the flux weakening in the M-T frame, which is a reference frame synchronized with the stator flux-linkage vector. Hence, the voltage and current limitations can be achieved by simple mathematical equations. In addition, the proposed system also includes amplitude compensation for an overmodulation PWM drive, armature voltage estimation for a square-wave drive. The effectiveness of the proposed system is experimentally demonstrated.

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Position Sensorless Torque Control System of PMSM in Overmodulation Range

Cited by 6 publications

References 7 publications

An Adjusted Current Control System for Signal Injection‐Based Position Sensorless Control and Parameter Identification

An Adjusted Current Control System for Signal Injection‐Based Position Sensorless Control and Parameter Identification

Adjusted current controller for signal-injection based control algorithms

Square-wave operation of direct torque controlled PMSM drive system

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