Patent ID: 7906925
Filing Date: 2011-03-15
Classification: H02P

Abstract:
1. An electric motor comprising: a coil array having a plurality of magnetic coils; a magnet array having a plurality of permanent magnets; a plurality of magnetic sensors each outputting an output signal that changes in analog fashion depending on relative location of the magnet array and the coil array; a drive control circuit that, utilizing analog change in the output signals of the plurality of magnetic sensors, generates application voltage for application to the coil array; and an output waveform correcting unit configured to respectively correct waveforms of the output signals of the plurality of magnetic sensors such that the output signals of the magnetic sensors assume a prescribed waveform shape during operation of the electric motors; wherein the output waveform correcting unit has a memory for storing output waveform correction values, ID codes are assigned respectively to the plurality of magnetic sensors, and the output waveform correcting unit receives from an external device an output waveform correction value for each magnetic sensor, together with the ID code for each magnetic sensor, and stores the output waveform correction value for each magnetic sensor in the memory.