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Ground Bridge Effect on Reduction of Conducted Emission from Three-Phase Motor Drive System
- Source :
- 2019 International Symposium on Electromagnetic Compatibility - EMC EUROPE.
- Publication Year :
- 2019
- Publisher :
- IEEE, 2019.
-
Abstract
- In electric vehicles, the pulse width modulation scheme is widely used in three-phase motor drive systems for its high performance. However, the fast switching of semiconductor devices may induce excessively high dv/dt and di/dt, which can cause electromagnetic interference (EMI) issues, making it difficult to satisfy electromagnetic compatibility standards. In this paper, the current conducted emission test for a three-phase motor drive system is performed based on CISPR 25 component-level testing setup for AM radio frequency band, which is from 530 kHz to 1.8 MHz. Under these conditions, common-mode (CM) noise generation mechanisms of the motor drive system are identified through measurements. It is found that the dominant mechanism is the mode conversion from differential mode (DM) switching current of the three-phase PWM inverter to CM current through the cable harness due to the imbalances in the PCB structure and EMI filter network which are at the dc input side of the three-phase inverter. Based on this finding, ground (GND) bridges are added between the digital signal and power GND nets to reduce the CM noise. The GND bridge effect on the reduction of CM noise in AM band is experimentally verified and further studied using circuit simulations.
- Subjects :
- Physics
business.industry
020208 electrical & electronic engineering
Electromagnetic compatibility
Electrical engineering
020206 networking & telecommunications
02 engineering and technology
Electromagnetic interference
Motor drive
EMI
0202 electrical engineering, electronic engineering, information engineering
Radio frequency
business
Noise (radio)
Pulse-width modulation
Induction motor
Subjects
Details
- Database :
- OpenAIRE
- Journal :
- 2019 International Symposium on Electromagnetic Compatibility - EMC EUROPE
- Accession number :
- edsair.doi...........4031f2667ff177075734e979bc739d5f