Analysis and optimisation of electromagnetic interference in motor drive system

The integrated power unit (IPU) is an important source of electromagnetic interference in hybrid electrical vehicles. In this paper, applying pulse width modulation (PWM) technology, IPU converts the high-voltage DC power from power battery into three-phase AC power with adjustable voltage amplitude...

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Bibliographic Details
Published in:International journal of electric and hybrid vehicles 2020, Vol.12 (1), p.15-31
Main Authors: Wu, Xiaoshan, Shi, Xiaohui, Li, Xu, Lei, Jianmei
Format: Article
Language:English
Subjects:
Alternating current
Circuits
Electric converters
Electric noise
Electromagnetic compatibility
Electromagnetic interference
Extraterrestrial radiation
Hybrid vehicles
Optimization
Permanent magnets
Product design
Pulse duration modulation
Radiation
Switching
Synchronous motors
Voltage
Waveforms
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Summary:The integrated power unit (IPU) is an important source of electromagnetic interference in hybrid electrical vehicles. In this paper, applying pulse width modulation (PWM) technology, IPU converts the high-voltage DC power from power battery into three-phase AC power with adjustable voltage amplitude and frequency through the switching device IGBT to drive the permanent magnet synchronous motor. Due to the large di/dt and du/dt during the IGBT switching process, the spectra of switching voltage and current waveforms have rich high-frequency components, which generate electromagnetic interference through the circuit connection or space radiation, affecting the normal operation of electrical systems inside and around the car. Therefore, this paper analyses the electromagnetic interference mechanism and coupling propagation paths of motor drive system. The test bench of IPU was built, and the EMI characteristics of IPU were analysed based on the measured results. Finally, in order to suppress IPU electromagnetic interference, the corresponding methods are proposed to meet the electromagnetic compatibility requirements of the vehicle.
ISSN:1751-4088
1751-4096
DOI:10.1504/IJEHV.2020.104261