| 摘要 |
An improvement in PWM switching patterns applicable for almost all voltage source converters is disclosed. Conventional PWM switching patterns, including carrier based PWM, spacer vector PWM, hysteretic switching pattern, etc, contain a lot of unnecessary switching events. In the present invention, most of the unnecessary switching events are eliminated. The benefits of the method include the significant reduction in control power dissipation which is very attractive especially in high power applications; no risk of shoot through; and no need for deadtime. This method can be easily applied to all existing switching patterns with a little modification. The modification can be in hardware, if the original switching pattern is generated in hardware; it can also be in software, if the original switching pattern is generated in software.
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