Modelling and frequency response analysis of permanent magnet synchronous machine with battery energy storage system
With the advancement of electric vehicles, permanent magnet synchronous motor (PMSM) has been gaining popularity for its small size, light weight and high power density. A double-star six-phase PMSM is commonly used for its advantage of being fault tolerant. This project researches on the dc-link si...
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| Format: | Final Year Project |
| Language: | English |
| Published: |
2016
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| Online Access: | http://hdl.handle.net/10356/67955 |
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| Institution: | Nanyang Technological University |
| Language: | English |
| Summary: | With the advancement of electric vehicles, permanent magnet synchronous motor (PMSM) has been gaining popularity for its small size, light weight and high power density. A double-star six-phase PMSM is commonly used for its advantage of being fault tolerant. This project researches on the dc-link side of the double-star PMSM drive with battery energy storage system. The dynamics of dc-link current and voltage are analysed through analytical calculation as well as simulation model. Commonly used motor control methods and inverter modulation strategies are also presented. The calculation of dc-link current and voltage ripples to a six-phase system is also developed from a three-phase system. Simulation results of a double-star system from Matlab/Simulink model are studied, which prove the calculation through the use of dc-link capacitor.
Furthermore, this project also investigates the dc-link dynamics under certain inverter fault conditions. Through simulations, it is observed that there are differences in dc-link waveforms and harmonics between each fault. From the different effects, fault that occurs in the inverter could then be determined by observing the dc-link. |
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