Method for operating pump e.g. auxiliary water pump for e.g. space heating of motor vehicle, involves operating pump in respective rotational directions with impeller, if target rate is above and/or below specified threshold

摘要

The method involves operating a pump (100) in one rotational direction with an impeller (130), if a target rate (155) is above a specified threshold, and operating the pump in other rotational direction with the impeller, if the target rate is below the specified threshold. The target delivery rate is defined by a phase width modulation (PWM) signal. The predetermined minimum speed of the impeller is not exceeded in the respective rotational directions. An independent claim is included for a pump.