Control circuit for e.g. vacuum cleaner`s fan motor, has microprocessor modifying control signal in dependent to voltage measuring signal such that load is provided with phase ranges, which are adapted to main voltages

摘要

The circuit has a microprocessor (100) whose supply voltage is measured at a voltage divider, where the control circuit is directly connected to different main voltages, whose upper threshold value exceeds lower threshold value more than 130 percentage. The microprocessor modifies a control signal in dependent to a voltage measuring signal such that load is provided with phase ranges, which are adapted to main voltages.