Detection of the angular position of the rotor of a brush motor without using sensors

摘要: A method of detecting an angular position a rotor motor includes switching ripple peaks and armature current disturbance using peak detector configured to generate square wave having edges coinciding with detected peaks. The further filtering the in time domain by generating integration ramp, toward set value, estimated frequency for interval based on frequency. An enablement range is established reset ramp setting threshold below above value window centered end each period resetting updating upon determined resetting, if edge within window. also integrating until exceeded, reducing not