| 摘要 |
Apparatus and three phase induction motor starting and stopping control method The invention refers to an apparatus and starting and stopping control method of three phase induction motors and consists of carrying out the striking of the static switches simultaneously two by two, establishing a synchronization with a determined point of the compound voltage wave corresponding to the phases that are struck, cyclically repeating in the three phases, determining the operating condition in discontinuous conduction, with instants without current in any phase. The apparatus basically comprises some voltage transducers connected between the input and output terminals of the static switches placed in each phase. At least in one of the phases there is a passing by zero detector connected, a striking control device, an electromotive power detector and an intensity transducer connected to the corresponding converter.
|
