Rapid Self-Compensation Method of Commutation Phase Error for Low- Inductance BLDC Motor

Zhou, Xinxiu; Chen, Xi; Lu, Ming–Feng; Zeng, Fanquan

doi:10.1109/tii.2017.2653812

Cited by 47 publications

(16 citation statements)

References 32 publications

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“…e e i ( 1 e ) Ie 2L (10) Where is the maximum phase current. According to the formula (8) and formula (10), the maximum and the minimum phase current are expressed as : (13) Where is the phase current fluctuation. As can be seen from the formula (2-9), when the inverter carrier frequency has the same circumference, the higher the PWM frequency is, the larger the electric time constant is and the smaller the current fluctuation rate is.…”

Section: B Analysis Of Motor Phase Current At Non-commutation Timementioning

confidence: 99%

“…motor is maintained at rated power [7], which means that the precise control of the motor phase current is an important part of the motor control. The literature [8] proposes current commutation compensation control strategy, which request that the detecting accuracy of the rotor speed is very high, and achieving the control strategy is too complicated. The literature [9] proposes the current hysteresis control strategy, which lead that the switching frequency of power tubes is not controllable.…”

Section: Introductionmentioning

confidence: 99%

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The peak current control of permanent magnet brushless DC machine with asymmetric dual-three phases

Bian

Li²,

Zhao³

2018

Trans. Electr. Mach. Syst.

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The asymmetric dual-three phase BLDC motor has two sets of stator windings, in which the back EMF coefficients are different. This paper takes advantage of the asymmetric dualthree phase BLDC motor's structural features and proposes a new method for the accelerated problem of the BLDC motor operating in the high speed and the constant electromagnetic power. The dual phase windings of the BLDC motor are integrated into the circuit in the starting stage. When the motor's back EMF value is equal to the terminal voltage value, switch off a set of RST three phase windings whose back EMF coefficient is bigger and make the other set of stator winding UVW with smaller back EMF coefficient continue to operate under the rated power. As the motor rotor speed continues to increase, the electromagnetic torque remains unchanged. By using the peak current control strategy, we can deduce that the phase current of the UVW threephase winding is twice the RST three-phase winding when the asymmetric dual-three phase BLDC motor operates at high speed and constant power. Index Terms-Asymmetric dual three phases, back emf coefficient, peak current control.

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Section: B Analysis Of Motor Phase Current At Non-commutation Timementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

The peak current control of permanent magnet brushless DC machine with asymmetric dual-three phases

Bian

Li²,

Zhao³

2018

Trans. Electr. Mach. Syst.

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show abstract

“…In order to obtain a more accurate commutation point of the sensorless method to reduce the phenomenon of high current ripple and motor power consumption, a large number of researchers have invented various sensorless control methods in the past decades to correct the inevitable commutation point error [24][25][26][27][28][29][30][31]. Jang et al used the proportion-integration (PI) controller to adjust the voltage difference between the front and rear ends of the back-EMF in a conduction interval to compel the elimination of commutation error indirectly.…”

Section: Introductionmentioning

confidence: 99%

Commutation error rapid compensation for brushless DC motor based on DC‐link current phase extraction method

Liu

Chen

Zheng

et al. 2020

IET Electric Power Applications

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In order to reduce the torque ripple and running loss caused by the commutation error in the brushless DC motor (BLDCM) of the magnetically suspended control moment gyroscope (MSCMG), this study proposes a novel method dealing with commutation error in sensorless controlled BLDCM by rapid phase extraction and compensation technique. First, a traditional virtual neutral point circuit consisted of three-phase resistance network and low-pass filter are used to obtain the zero-crossing points of the non-conducting phase back electromotive force without noise interference. Then, an improved phase extraction method is built after analysing the DC-link current. Commutation error is extracted from DC-link current with the improved phase extractor rapidly. Furthermore, the effect of speed offset caused by fluctuation during phase extraction is also analysed and an adaptive commutation error compensation method based on the DC-link current phase extraction is proposed. Finally, simulation and experimental results performed on the high-speed motor of MSCMG verify its effectiveness and rapidity. The main novelties of this study are the direct phase extraction algorithm with natural parameter insensitivity and robustness and the rapid iterative commutation error compensation method based on the extraction algorithm.

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“…Wang and Lee [8] employ the first-order and second-order Butterworth filters depending on different speed zone to minimize the influence from sensor noise and to reduce delay. Zhou et al [9] proposes a novel selfcompensation method of commutation error based on the relationship between the commutation point shift and the difference of DC-link current. Li et al [10] reduces the differ-ence of the non-energized phase's terminal voltage between the beginning and the end of commutation to make the actual commutation instants approach to the ideal commutation instants.…”

Section: Introductionmentioning

confidence: 99%

A Lag Angle Compensation Strategy of Phase Current for High-Speed BLDC Motors

et al. 2019

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For brushless dc motor operating at ideal commutation point, the angle of the phase current vector will lag behind that of the back electromotive force (EMF) vector due to the motor phase inductance. The lag angle increases the root-mean-square (rms) value of phase current under a certain average torque output, which results in more heat and less efficiency, especially at high rotational velocity. The principle that the angle of ideal current vector is equal to that of the back EMF vector at the center of a conduction sector is analyzed. A novel advance compensation method for commutation point is proposed based on the principle. The advance angle is calculated in real time according to the phase current, the inductance, and the flux linkage established by the magnet of the motor. By conducting the voltage vector of voltage source inverter before the ideal commutation point in advance, the lag of the phase current would be eliminated. Thereby, the rms value of the phase current is reduced. Finally, both simulation and experiments verify the effectiveness of the proposed method.

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Rapid Self-Compensation Method of Commutation Phase Error for Low- Inductance BLDC Motor

Cited by 47 publications

References 32 publications

The peak current control of permanent magnet brushless DC machine with asymmetric dual-three phases

The peak current control of permanent magnet brushless DC machine with asymmetric dual-three phases

Commutation error rapid compensation for brushless DC motor based on DC‐link current phase extraction method

A Lag Angle Compensation Strategy of Phase Current for High-Speed BLDC Motors

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