초록 ▼

A high efficiency automotive electrical system and method of control employing an asynchronous induction machine for performing both starting and generating functions. The induction machine is coupled to the engine through a bimodal gearset which operates as a reduction drive during the starting mod

A high efficiency automotive electrical system and method of control employing an asynchronous induction machine for performing both starting and generating functions. The induction machine is coupled to the engine through a bimodal gearset which operates as a reduction drive during the starting mode and as a direct drive during the generating mode. A computer-based controller responsive to the battery voltage and the speed of the induction machine maintains given voltage/frequency ratios during both starting and generating to provide efficient operation, and smoothly controls the transition between starting and generating modes. The vehicle electrical loads are supplied at one or more stable voltages produced by a load converter powered by the battery.

대표청구항 ▼

A motor vehicle electrical system for starting an internal combustion engine and generating electricity for charging a vehicle storage battery and energizing vehicle electrical loads, comprising in combination: an induction machine coupled to the engine for bi-directional rotary mechanical energy ex

A motor vehicle electrical system for starting an internal combustion engine and generating electricity for charging a vehicle storage battery and energizing vehicle electrical loads, comprising in combination: an induction machine coupled to the engine for bi-directional rotary mechanical energy exchange; bi-directional bridge circuit means electrically coupling the storage battery and the induction machine for bi-directional electrical energy exchange; control means for controlling the operation of said bridge circuit means (1) in an engine starting mode to operate said bridge as an inverter for energizing said induction machine with substantially sinusoidal voltage derived from the storage battery, and (2) in a generating mode to operate said bridge as a converter for drawing energy from the induction machine for charging the storage battery; and load converter means coupled between the storage battery and the electrical loads for drawing current from said storage battery at a predefined load voltage for energizing said electrical loads.