Experimental tests on a 12-slot 8-pole Integrated Starter-Alternator

In modern vehicles, the Integrated Starter-Alternator (ISA) is an electrical machine that has to crank up the internal combustion engine, and to generate electric power during normal driving. Therefore, the ISA has to exhibit high torque and a wide constant-power speed range. This paper reports some design criteria, analysis and test results of an ISA that has been developed using a fractional-slot interior permanent magnet motor.