A rotary machine, in particular electric motor, includes a position sensing means for sensing a rotational position of a pole wheel that is rotatable about an axis of rotation. The pole wheel has a circumferential edge, and the position sensing means has at least one first position sensor for sensing a change in a magnetic field, at least one magnetic element arranged on the pole wheel, and at least one circuit card on which electronic components are arranged. The first position sensor is arranged at least indirectly on the circuit card. The first position sensor extends at least partially into a space of the pole wheel that surrounded by the circumferential edge.

A rotary machine, in particular electric motor, includes a position sensing means for sensing a rotational position of a pole wheel that is rotatable about an axis of rotation. The pole wheel has a circumferential edge, and the position sensing means has at least one first position sensor for sensing a change in a magnetic field, at least one magnetic element arranged on the pole wheel, and at least one circuit card on which electronic components are arranged. The first position sensor is arranged at least indirectly on the circuit card. The first position sensor extends at least partially into a space of the pole wheel that surrounded by the circumferential edge.

The present invention provides a motor including a stator, a rotor disposed inside the stator, a shaft coupled to the rotor, a busbar disposed above the stator, and a wire assembly connected to the busbar, wherein the wire assembly includes a grommet, a cable of which a part is disposed inside the grommet, and a first terminal connected to the cable. The first terminal includes a connecting end portion, the grommet includes a body having the cable therein, and an extension extending from the body and having the first terminal therein, the extension includes an insert hole formed to pass through from a lower surface of the extension to an upper surface of the extension, and the connecting end portion is disposed inside the insert hole.

In accordance with an embodiment, a method for driving a motor includes determining a position of a first pole of a rotor of the motor relative to a position of a Hall sensor. A drive signal is generated in response to the position of the first pole of the rotor of the motor, the drive signal having a duty in accordance with the duty control signal or a second duty control signal. In accordance with another embodiment, a drive circuit for a motor includes a state controller connected to a rotational state generation unit, a pulse width modulation detection circuit, and a duty control controller. An align duty set circuit is connected to the duty control controller.

The present disclosure relates to actuators. The teachings thereof may be embodied in an actuator drive for a flap or for a valve for setting a gaseous or liquid volume flow, for example in the heating, ventilation, and/or air conditioning of a building, for a DC motor with a reduction gear connected downstream and a gearbox-side output. The actuator may include: a motor control unit and a voltage supply unit. The motor may be a brushless two-phase DC motor with a stator comprising a quadruple T armature, each armature comprising an armature coil and a radially outward-lying rotor mounted to rotate relative to the stator. Each armature may have precisely four alternating permanent magnetic poles uniformly distributed. The rotor is connected to a spring applying a restoring force to the rotor if the rotor is deflected from a rest position. The motor control unit includes switches for the DC motor and connects the armature coils to the voltage supply unit as a function of a rotational position of the rotor and the armature coils are interconnected in such a way that, when subjected to current excitation, two adjacent armature coils never form magnetic poles having the same polarity.

The present disclosure relates to actuators. The teachings thereof may be embodied in an actuator drive for a flap or for a valve for setting a gaseous or liquid volume flow, for example in the heating, ventilation, and/or air conditioning of a building, for a DC motor with a reduction gear connected downstream and a gearbox-side output. The actuator may include: a motor control unit and a voltage supply unit. The motor may be a brushless two-phase DC motor with a stator comprising a quadruple T armature, each armature comprising an armature coil and a radially outward-lying rotor mounted to rotate relative to the stator. Each armature may have precisely four alternating permanent magnetic poles uniformly distributed. The rotor is connected to a spring applying a restoring force to the rotor if the rotor is deflected from a rest position. The motor control unit includes switches for the DC motor and connects the armature coils to the voltage supply unit as a function of a rotational position of the rotor and the armature coils are interconnected in such a way that, when subjected to current excitation, two adjacent armature coils never form magnetic poles having the same polarity.

A phase control circuit for a brushless motor includes a signal output unit that outputs M signals, whose phases differ from each other, in response to a change in the magnetic field resulting from the rotation of magnets placed in a rotor, and a control signal generator that generates two or more different kinds of group of phase control signals, based on at least the M signals, the group of phase control signals being used to control drive voltages, whose phases differ from each other, which are supplied to each phase of an N-phase coil (N being an integer greater than or equal to two). The control signal generator is configured such that a first phase control signal group and a second phase control signal group can be generated.

An actuator comprising a housing defining an interior cavity for a motor, gear assemblies, and a printed circuit overlying the motor and the gear assemblies. An elastomeric seal band is located between the housing and the cover for sealing the interior cavity of the housing. The seal band includes a plurality of compressible elastomeric beads that abut against the cover and exert a force against the printed circuit board respectively for preventing the vibration of the printed circuit board in the housing. A plurality of curved clips are received in respective clip brackets formed on the housing and the cover respectively for clamping a cover to the housing.

An electric motor-attached speed reducer includes a first member, an electric motor, a speed reduction mechanism, and a second member. The electric motor is arranged to produce rotational motion with respect to the first member. The speed reduction mechanism is arranged to transfer the rotational motion obtained from the electric motor while reducing the speed thereof. The second member is arranged to rotate relative to the first member at a rotation rate resulting from the speed reduction. A first bearing is arranged between the first and second members. A second bearing is arranged between the first member and a rotor of the electric motor. The speed reduction mechanism includes a flexible third bearing arranged between a non-perfect circular cam and a flexible external gear. The second bearing is arranged to radially overlap with a rotor holder at a first axial position. The third bearing is arranged to radially overlap with the rotor holder at a second axial position different from the first axial position.

In a controller for an AC rotating electric machine, a failure-state determining circuitry determines a failure state of a magnetic-pole position sensor based on an output signal from the magnetic-pole position sensor. A modulation-ratio switching circuitry outputs a target value of a modulation ratio and also changes the target value to be output based on a result of the failure-state determining circuitry. The modulation-ratio switching circuitry sets, when the magnetic-pole position sensor is determined as being abnormal by the failure-state determining circuitry, the target value to be smaller than in a case in which the magnetic-pole sensor is determined as being normal by the failure-state determining circuitry.