Modified SVPWM technique for CMV reduction in asymmetrical dual three phase induction machine drive
Manoj K Chaudhury1, Mukesh K Pathak2, Girish K Singh2
1Department of Electrical Engineering, IIT Roorkee, Roorkee, India. mcelect05@gmail.com.
Scientific Reports
|December 13, 2023
Summary
This study introduces a new SVPWM technique to reduce common-mode voltage in dual three-phase induction motor drives. The modified method significantly lowers damaging voltage, enhancing system reliability and performance.
Area of Science:
- Electrical Engineering
- Power Electronics
- Motor Drives
Background:
- Asymmetrical dual three-phase induction motor drives are used in high-power applications.
- Common-mode voltage (CMV) from inverters causes winding insulation damage, bearing issues, electromagnetic interference, and leakage currents.
Purpose of the Study:
- To analyze CMV in dual three-phase induction motor drives.
- To propose a novel modified space vector decomposition-based Space Vector Pulse Width Modulation (SVPWM) technique for CMV reduction.
Main Methods:
- Vector space decomposition-based SVPWM technique.
- Exploiting the additional degree of freedom in dual three-phase systems.
- Experimental validation of the proposed scheme.
Main Results:
- Reduced CMV to one-sixth of the DC link voltage, compared to half in conventional SVPWM.
- Demonstrated effectiveness in reducing CMV amplitude and pulsations.
- Showcased reduced total harmonic distortion (THD) in current.
Conclusions:
- The proposed modified SVPWM technique effectively reduces CMV in dual three-phase induction motor drives.
- The method enhances system reliability by mitigating insulation and bearing damage.
- Experimental results confirm the significant improvement in CMV reduction and current quality.
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