Method for controlling the speed of a collectorless DC motor and collectorless DC motor for performing the method

摘要

In the case of a DC motor without a commutator, a storage element is provided which is charged whenever a specific rotor position is reached. At the same time, a variable on this storage element is changed. This variable is compared with another variable which is dependent on a desired parameter. On reaching a specific comparison criterion, a comparison signal is produced. The interval between the start of this comparison signal and a second predetermined rotor position, which follows the first predetermined rotor position in time, is measured, and the electrical current through the DC motor without a commutator is influenced on the basis of this measured value.