Small dimension polyphase electric motor for operating air admission valves in automobiles, uses Hall effect rotor position sensors with analogue or digital outputs

摘要

The motor (1) includes rotor position sensors (9) used to control the motor in auto-commutation mode. The sensors (9) are Hall effect probes having analogue or digital outputs.. The motor (1) has a stator (2) with windings (3) and a rotor having N pole pairs (5), where N is greater than or equal to 4 all being different by a multiple of 3. The stator has P * 9 identical poles (6), separated by 40 degrees / P. The stator poles are consecutively grouped by three so as to define a phase (8) forming a circuit W of three consecutive poles (6). The central stator pole (7) supports the phase winding (3). A rotor position sensor (9) is placed in a location (10) sensibly equidistant between two consecutive stator poles not belonging to the same phase.