Читать книгу Origin of Power Converters - Tsai-Fu Wu - Страница 16

In power converters, when switch turns on with infinite current through or infinite voltage across components, this is because there is no current‐limiting or voltage‐blocking components in the conduction path, resulting in severe electromagnetic interference (EMI) problems. This type of power converter cannot be controlled with PWM and is called a non‐PWM converter. On the contrary, there exist current‐limiting and voltage‐blocking components in the conduction path of a power converter, and it can be controlled with PWM, which is called a PWM converter. This claim will be presented and illustrated with some power converter examples, as follows.