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Peifei Li

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Conference paper
Published: 09 July 2019 in IOP Conference Series: Earth and Environmental Science
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The ground current equivalent circuit of the series chopper circuit is proposed. The ground current of the following two switching modes is analysed: The IGBT of the upper chopper circuit is turned on when the IGBT of the lower chopper circuit is in the off state; The IGBT of the upper chopper circuit is turned off when the IGBT of the lower chopper circuit is in the off state. The ground current paths of the two switching modes are analyzed, and the mechanism of ground current crosstalk between the upper and lower chopper circuits in the series chopper circuit is obtained. The analysis is verified by simulation and experimentation.

ACS Style

Peifei Li; Lei Zhang; Bin Ouyang; Xiaofei Zhai. Research on Ground Current of High-Power Series Chopper Circuit. IOP Conference Series: Earth and Environmental Science 2019, 252, 032105 .

AMA Style

Peifei Li, Lei Zhang, Bin Ouyang, Xiaofei Zhai. Research on Ground Current of High-Power Series Chopper Circuit. IOP Conference Series: Earth and Environmental Science. 2019; 252 (3):032105.

Chicago/Turabian Style

Peifei Li; Lei Zhang; Bin Ouyang; Xiaofei Zhai. 2019. "Research on Ground Current of High-Power Series Chopper Circuit." IOP Conference Series: Earth and Environmental Science 252, no. 3: 032105.

Journal article
Published: 04 April 2019 in Electronics
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In the model reference adaptive speed observer, the induction motor supply voltage is used as the input of the reference model. However, measuring the supply voltage complicates the system and increases the cost, so the command voltage calculated by the controller is generally used instead of the actual supply voltage in the drive system. However, due to the nonlinear effects of the inverter, the voltage calculated by the controller is different from the actual supply voltage, resulting in a speed observation deviation. This paper analyzes the multiple effects that cause the three-level neutral-point clamped (TL-NPC) inverter output voltage and command voltage deviation. A voltage deviation compensation measure based on the volt-second balance principle is proposed. In this context, the expression of the rotational speed deviation caused by the voltage deviation is derived rigorously and in detail. Finally, the effectiveness of the voltage compensation measure is verified by experiments. The experimental results are basically consistent with the theoretical derivation expressions. The method and analysis in this paper is applicable to induction motor speed sensorless control systems driven by two-level and other multilevel inverters.

ACS Style

Peifei Li; Lei Zhang; Bin Ouyang; Yong Liu. Nonlinear Effects of Three-Level Neutral-Point Clamped Inverter on Speed Sensorless Control of Induction Motor. Electronics 2019, 8, 402 .

AMA Style

Peifei Li, Lei Zhang, Bin Ouyang, Yong Liu. Nonlinear Effects of Three-Level Neutral-Point Clamped Inverter on Speed Sensorless Control of Induction Motor. Electronics. 2019; 8 (4):402.

Chicago/Turabian Style

Peifei Li; Lei Zhang; Bin Ouyang; Yong Liu. 2019. "Nonlinear Effects of Three-Level Neutral-Point Clamped Inverter on Speed Sensorless Control of Induction Motor." Electronics 8, no. 4: 402.