Electrical consumer e.g. starter motor, starting current limiting method for internal combustion engine of motor vehicle, involves operating switch in clocked manner to limit starting current of electrical consumer

摘要

The method involves linearly regulating a switch (S1) e.g. metal oxide semiconductor transistor, in a phase after switching-on an electrical consumer i.e. starter motor (2) for an internal combustion engine. Another switch is operated in a clocked manner to limit a starting current of the electrical consumer. The latter switch is controlled in another phase by a pulse-width-modulation (PWM) signal, where the former phase is shorter than the latter phase. A current in the latter phase is limited to approximately half of the maximum current in the former phase. An independent claim is also included for a switching device comprising switches.