A Transformerless Medium Voltage Multiphase Motor Drive System
A multiphase motor has several major advantages, such as high reliability, fault tolerance, and high power density. It is a critical issue to develop a reliable and efficient multiphase motor drive system. In this paper, a transformerless voltage source converter-based drive system for a medium-volt...
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| Format: | Article |
| Language: | English |
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MDPI AG
2016-04-01
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| Series: | Energies |
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| Online Access: | http://www.mdpi.com/1996-1073/9/5/323 |
| _version_ | 1811263341649199104 |
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| author | Dan Wang Jiawei Yang Zhu Chen Chengxiong Mao Jiming Lu |
| author_facet | Dan Wang Jiawei Yang Zhu Chen Chengxiong Mao Jiming Lu |
| author_sort | Dan Wang |
| collection | DOAJ |
| description | A multiphase motor has several major advantages, such as high reliability, fault tolerance, and high power density. It is a critical issue to develop a reliable and efficient multiphase motor drive system. In this paper, a transformerless voltage source converter-based drive system for a medium-voltage (MV) multiphase motor is proposed. This drive converter employs cascaded H-bridge rectifiers loaded by H-bridge inverters as the interface between the grid and multiphase motor. The cascaded H-bridge rectifier technique makes the drive system able to be directly connected to the MV grid without the phase-shifting transformer because it can offset the voltage level gap between the MV grid and the semiconductor devices, provide near-sinusoidal AC terminal voltages without filters, and draw sinusoidal line current from the grid. Based on a digital signal processor (DSP), a complete improved Phase Disposition Pulse Width Modulation (PD-PWM) method is developed to ensure the individual DC-link capacitor voltage balancing for enhancing the controllability and limiting the voltage and power stress on the H-bridge cells. A downscaled prototype is designed and developed based on a nine-phase motor. The experimental results verify the excellent performances of the proposed drive system and control strategy in steady-state and variant-frequency startup operations. |
| first_indexed | 2024-04-12T19:44:05Z |
| format | Article |
| id | doaj.art-4297378a6c0445f98f0d4d3607fbc6ba |
| institution | Directory Open Access Journal |
| issn | 1996-1073 |
| language | English |
| last_indexed | 2024-04-12T19:44:05Z |
| publishDate | 2016-04-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Energies |
| spelling | doaj.art-4297378a6c0445f98f0d4d3607fbc6ba2022-12-22T03:19:01ZengMDPI AGEnergies1996-10732016-04-019532310.3390/en9050323en9050323A Transformerless Medium Voltage Multiphase Motor Drive SystemDan Wang0Jiawei Yang1Zhu Chen2Chengxiong Mao3Jiming Lu4School of Electrical and Electronic Engineering, Huazhong University of Science and Technology, Wuhan 430074, ChinaDongfang Electric Corporation, New & Hi-tech Industry Western Zone, Xixin Avenue No. 18, Chengdu 611731, ChinaSchool of Electrical and Electronic Engineering, Huazhong University of Science and Technology, Wuhan 430074, ChinaSchool of Electrical and Electronic Engineering, Huazhong University of Science and Technology, Wuhan 430074, ChinaSchool of Electrical and Electronic Engineering, Huazhong University of Science and Technology, Wuhan 430074, ChinaA multiphase motor has several major advantages, such as high reliability, fault tolerance, and high power density. It is a critical issue to develop a reliable and efficient multiphase motor drive system. In this paper, a transformerless voltage source converter-based drive system for a medium-voltage (MV) multiphase motor is proposed. This drive converter employs cascaded H-bridge rectifiers loaded by H-bridge inverters as the interface between the grid and multiphase motor. The cascaded H-bridge rectifier technique makes the drive system able to be directly connected to the MV grid without the phase-shifting transformer because it can offset the voltage level gap between the MV grid and the semiconductor devices, provide near-sinusoidal AC terminal voltages without filters, and draw sinusoidal line current from the grid. Based on a digital signal processor (DSP), a complete improved Phase Disposition Pulse Width Modulation (PD-PWM) method is developed to ensure the individual DC-link capacitor voltage balancing for enhancing the controllability and limiting the voltage and power stress on the H-bridge cells. A downscaled prototype is designed and developed based on a nine-phase motor. The experimental results verify the excellent performances of the proposed drive system and control strategy in steady-state and variant-frequency startup operations.http://www.mdpi.com/1996-1073/9/5/323cascaded H-bridge convertermotor drivemultiphase motorPD-PWMtransformerless |
| spellingShingle | Dan Wang Jiawei Yang Zhu Chen Chengxiong Mao Jiming Lu A Transformerless Medium Voltage Multiphase Motor Drive System Energies cascaded H-bridge converter motor drive multiphase motor PD-PWM transformerless |
| title | A Transformerless Medium Voltage Multiphase Motor Drive System |
| title_full | A Transformerless Medium Voltage Multiphase Motor Drive System |
| title_fullStr | A Transformerless Medium Voltage Multiphase Motor Drive System |
| title_full_unstemmed | A Transformerless Medium Voltage Multiphase Motor Drive System |
| title_short | A Transformerless Medium Voltage Multiphase Motor Drive System |
| title_sort | transformerless medium voltage multiphase motor drive system |
| topic | cascaded H-bridge converter motor drive multiphase motor PD-PWM transformerless |
| url | http://www.mdpi.com/1996-1073/9/5/323 |
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