Patent ID: 6977475
Filing Date: 2005-12-20
Classification: F02N,H02K

Abstract:
1. An automotive electric power supply apparatus comprising: a battery; an automotive dynamoelectric machine linked to an engine, said automotive dynamoelectric machine being driven by electric power from said battery to start said engine during starting of said engine, and being driven by said engine to generate alternating-current power after said engine has been started; an inverter having a plurality of element-diode sets, each element-diode set including a pair of switching elements connected in series between positive and negative terminals of said battery and a diode connected in parallel to said switching elements, a connection point of said switching elements connected in series being connected to said automotive dynamoelectric machine; and a control apparatus for controlling said inverter such that said automotive dynamoelectric machine is driven by switching said switching elements on and off to supply electric power from said battery to said automotive dynamoelectric machine during said starting of said engine, and said battery is charged by switching said switching elements off to enable said diodes to rectify alternating-current power generated in said automotive dynamoelectric machine into direct-current electric power at least across an entire normal rotational speed region of said engine, wherein said automotive dynamoelectric machine is constructed so as to satisfy an expression {E/(p