EPE Association: EPE 2023 - LS7d: Special Topologies and Controls of Electric Drives

EPE 2023 - LS7d: Special Topologies and Controls of Electric Drives
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 2023 ECCE Europe - Conference > EPE 2023 - Topic 05: Renewable Energy Power Systems > EPE 2023 - LS7d: Special Topologies and Controls of Electric Drives

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   An active control method after switch short-circuit fault for open-end winding motor system with isolated supply
By Xiangwen SUN, Zicheng LIU, Dong JIANG, Ronghai QU, Hongyang LIU, Guang YANG [View]
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Abstract: The open-end winding drive with isolated supply is equipped with redundant control degrees of freedom to improve the operation reliability. For the switch short-circuit fault with higher probability of occurrence and greater harm, this paper proposes a new perspective, in which the fault is treated as an extra voltage constraint. The constrain is substituted into the vector control design, ensuring the normal operation of motor with smooth torque after the fault. Then the new outputs of healthy bridges are solved. Therefore, the unexpected faults can be fault-tolerant through active adjustment of control, rather than passively removing the faulty parts. The proposed method has been verified in a induction motor.

   Sensorless Control Techniques for Variable Magnetomotive Force Motors Using Magnetic Flux Estimation
By Manato ISHIMIZU, Sari MAEKAWA [View]
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Abstract: This paper proposes a control configuration in which the variable magnetic flux of the VMFM is detected online and feedback to the control. We show that applying a non-true value of the magnetic flux to sensorless control results in unstable control, and report on the usefulness of the proposed method.

   Vibration Reduction Method by Instantaneous Current Control in Sensorless 120-degree Conduction Drive of Compressor motor
By Yusuke OMI, Takumi YASUDA, Takahiro KUMAGAI, Hiroki WATANABE, Jun-Ichi ITOH [View]
[Download]

Abstract: This paper proposes the vibration suppression method for compressors driven in 120-degree conduction mode. The load torque characteristic of the compressor fluctuates in one period of the mechanical angle. Thus, the speed ripple occurs in the motor, and the compressor vibrates. Therefore, this paper proposes a vibration reduction method with an instantaneous current control with a disturbance observer for the compressor driven by the 120-degree conduction mode. The feature of this paper is that motor speed is estimated by the back electromotive force (EMF) of the open phase due to the 120-degree conduction mode drive. The proposed method is verified experimentally under a limited loaded condition of the compressor as a fundamental study. As a result, the proposed control method reduces the fundamental frequency component of the vibration by 66.4\% at a low speed of 0.19 p.u.

EPE 2023 - LS7d: Special Topologies and Controls of Electric Drives
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 2023 ECCE Europe - Conference > EPE 2023 - Topic 05: Renewable Energy Power Systems > EPE 2023 - LS7d: Special Topologies and Controls of Electric Drives
	[return to parent folder]

	An active control method after switch short-circuit fault for open-end winding motor system with isolated supply By Xiangwen SUN, Zicheng LIU, Dong JIANG, Ronghai QU, Hongyang LIU, Guang YANG	[View] [Download]
Abstract: The open-end winding drive with isolated supply is equipped with redundant control degrees of freedom to improve the operation reliability. For the switch short-circuit fault with higher probability of occurrence and greater harm, this paper proposes a new perspective, in which the fault is treated as an extra voltage constraint. The constrain is substituted into the vector control design, ensuring the normal operation of motor with smooth torque after the fault. Then the new outputs of healthy bridges are solved. Therefore, the unexpected faults can be fault-tolerant through active adjustment of control, rather than passively removing the faulty parts. The proposed method has been verified in a induction motor.

	Sensorless Control Techniques for Variable Magnetomotive Force Motors Using Magnetic Flux Estimation By Manato ISHIMIZU, Sari MAEKAWA	[View] [Download]
Abstract: This paper proposes a control configuration in which the variable magnetic flux of the VMFM is detected online and feedback to the control. We show that applying a non-true value of the magnetic flux to sensorless control results in unstable control, and report on the usefulness of the proposed method.

	Vibration Reduction Method by Instantaneous Current Control in Sensorless 120-degree Conduction Drive of Compressor motor By Yusuke OMI, Takumi YASUDA, Takahiro KUMAGAI, Hiroki WATANABE, Jun-Ichi ITOH	[View] [Download]
Abstract: This paper proposes the vibration suppression method for compressors driven in 120-degree conduction mode. The load torque characteristic of the compressor fluctuates in one period of the mechanical angle. Thus, the speed ripple occurs in the motor, and the compressor vibrates. Therefore, this paper proposes a vibration reduction method with an instantaneous current control with a disturbance observer for the compressor driven by the 120-degree conduction mode. The feature of this paper is that motor speed is estimated by the back electromotive force (EMF) of the open phase due to the 120-degree conduction mode drive. The proposed method is verified experimentally under a limited loaded condition of the compressor as a fundamental study. As a result, the proposed control method reduces the fundamental frequency component of the vibration by 66.4\% at a low speed of 0.19 p.u.