초록 ▼

The saturation of interphase transformers connected to an inverter is prevented through the use of an inverter switch firing control circuit. The inverter switch firing control circuit includes a control module to execute a standard switch firing scheme to produce a set of inverter pole output signa

The saturation of interphase transformers connected to an inverter is prevented through the use of an inverter switch firing control circuit. The inverter switch firing control circuit includes a control module to execute a standard switch firing scheme to produce a set of inverter pole output signals including a first inverter pole output signal and a second inverter pole output signal, with the first inverter pole output signal having a predetermined phase displacement from the second inverter pole output signal. The circuit also includes a control module to execute a system transient switch firing scheme wherein the inverter reduces the predetermined phase displacement between the first inverter pole output signal and the second inverter pole output signal in the presence of a system transient. This reduction in phase displacement between inverter pole output signals prevents saturation of interphase transformers. Thus, the size, cost, and weight of interphase transformers may be substantially reduced.

대표청구항 ▼

In a power circuit of the type including a set of interphase transformers and an inverter connected to said set of interphase transformers, said inverter generating a set of inverter pole output signals that are applied to said set of interphase transformers, said set of inverter pole output signals

In a power circuit of the type including a set of interphase transformers and an inverter connected to said set of interphase transformers, said inverter generating a set of inverter pole output signals that are applied to said set of interphase transformers, said set of inverter pole output signals including a first inverter pole output signal and a second inverter pole output signal, said first inverter pole output signal having a predetermined phase displacement from said second inverter pole output signal, the improvement comprising: a control circuit to identify a system transient, to regulate said inverter such that said inverter reduces said predetermined phase displacement between said first inverter pole output signal and said second inverter pole output signal in response to said system transient, and to restore said predetermined phase displacement between said first inverter pole output signal and said second inverter pole output signal after said system transient.