Patent ID: 6888327
Filing Date: 2005-05-03
Classification: H02P,Y10S

Abstract:
1. An electronically commutatable motor comprising: a plurality of excitation windings having a common magnetic circuit; a corresponding plurality of power semiconductor output stages, the output stages including low-side-connected N-channel MOSFETs, wherein each of the excitation windings is connected in a series circuit integrally with a respective one of the MOSFETs, the excitation windings being connected to a common direct-current supply voltage, the excitation windings being energized successively in a commutation cycle and being situated alternatingly in opposite directions into the series circuits with the MOSFETs, wherein, in the context of more than two excitation windings, the commutation cycle extends over an even number of successive, alternatingly oppositely polarized excitation windings, and wherein, in associated commutation phases, the MOSFETs are driven fully into a conductive state with uniform control signals; and a smoothing capacitor connected in parallel to the series circuits of the MOSFETs and windings between the voltage and ground for transferring back, in a countercurrent direction to the direct-current supply voltage, a disconnection energy transferred in a transformer fashion, upon disconnection of the excitation windings, to a respectively next energizable excitation winding.