An actuator utilizes a voice coil motor with one or more voice coil windings supported on a light weight moveable bobbin that connects at one end to move an object rapidly up to a small number of millimeters translationally along a system axis. The bobbin moves over a distal portion of a center pole of a stator, which supports the voice coil motor magnets. The pole, which acts as a flux path for the voice coil motor, also provides a thin film of air in a gap between the pole and the bobbin via an air path and corresponding holes at the distal end of the pole. The bobbin moves translationally relative to the pole on the thin film of air under the control of the voice coil motor.

A stator assembly has coils in a distributed winding configuration. A poly-phase switched reluctance motor assembly may include a stator assembly with multiple coils in a distributed winding configuration. The stator assembly may have a central bore into which a rotor assembly having multiple poles is received and configured to rotate. A method of controlling a switched reluctance motor may include at least three phases wherein during each conduction period a first phase is energized with negative direction current, a second phase is energized with positive current and there is at least one non-energized phase. During each commutation period either the first phase or second phase switches off to a non-energized state and one of the non-energized phases switches on to an energized state with the same direction current as the first or second phase that was switched off. The switched reluctance motor may include a distributed winding configuration.

A stator assembly has coils in a distributed winding configuration. A poly-phase switched reluctance motor assembly may include a stator assembly with multiple coils in a distributed winding configuration. The stator assembly may have a central bore into which a rotor assembly having multiple poles is received and configured to rotate. A method of controlling a switched reluctance motor may include at least three phases wherein during each conduction period a first phase is energized with negative direction current, a second phase is energized with positive current and there is at least one non-energized phase. During each commutation period either the first phase or second phase switches off to a non-energized state and one of the non-energized phases switches on to an energized state with the same direction current as the first or second phase that was switched off. The switched reluctance motor may include a distributed winding configuration.

A lead screw attachment mechanism for a linear actuator system is provided. The attachment mechanism comprises an attachment housing comprising a fixed cover configured to house the attachment mechanism. The attachment mechanism comprises a first coupling mechanism configured to couple the attachment mechanism to an output shaft of a motor and a second coupling mechanism configured to couple the attachment mechanism to a lead nut, wherein the lead nut is configured to move linearly along an axis defined by a length of the attachment mechanism. The attachment mechanism is configured to rotate about the axis, within the fixed cover.

A lead screw attachment mechanism for a linear actuator system is provided. The attachment mechanism comprises an attachment housing comprising a fixed cover configured to house the attachment mechanism. The attachment mechanism comprises a first coupling mechanism configured to couple the attachment mechanism to an output shaft of a motor and a second coupling mechanism configured to couple the attachment mechanism to a lead nut, wherein the lead nut is configured to move linearly along an axis defined by a length of the attachment mechanism. The attachment mechanism is configured to rotate about the axis, within the fixed cover.

An electric motor assembly (10), in particular for driving a vehicle, comprises an electric motor (12), a magnetic sensor (46) and a shield (14), the electric motor (12) being equipped with a stator (16), a rotor (18) and at least one magnet (28) which is connected to the rotor (18) for conjoint rotation therewith and generates a measuring magnetic field (M.sub.M). The magnetic sensor (46) is located in the measuring magnetic field (M.sub.M) and is connected to the shield (14), and the shield (14) has high magnetic permeability and is closed in the area of the magnetic sensor (46).

A starter/generator system that includes a first and second electric machine. The first electric machine has a first rotor and a first stator where the first rotor is adapted to receive kinetic energy and the first stator includes a first set of windings. The second electric machine has a second rotor rotatable and a second stator. The second stator is fixed relative to the first stator and the second stator includes a second set of windings.

A rotary reciprocating drive actuator capable of increasing the size and amplitude of a movable object such as a mirror, and of stabilizing the drive performance is provided. The rotary reciprocating drive actuator includes a movable part including a rotating shaft, a fixed part supporting the rotating shaft, and a driving part that includes a coil and a core disposed on the fixed part and a magnet disposed on the rotating shaft, and rotates the rotating shaft about the axis thereof with respect to the fixed part by utilizing electromagnetic interaction. The fixed part includes first and second supports disposed so as to face each other with the magnet therebetween in the axial direction. The rotating shaft is rotatably attached to the first and second supports via first and second bearings. One of the first and second bearings is a rolling bearing, and the other is a slide bearing.

A rotary reciprocating drive actuator capable of increasing the size and amplitude of a movable object such as a mirror, and of stabilizing the drive performance is provided. The rotary reciprocating drive actuator includes a movable part including a rotating shaft, a fixed part supporting the rotating shaft, and a driving part that includes a coil and a core disposed on the fixed part and a magnet disposed on the rotating shaft, and rotates the rotating shaft about the axis thereof with respect to the fixed part by utilizing electromagnetic interaction. The fixed part includes first and second supports disposed so as to face each other with the magnet therebetween in the axial direction. The rotating shaft is rotatably attached to the first and second supports via first and second bearings. One of the first and second bearings is a rolling bearing, and the other is a slide bearing.

A motor and a ground structure of an EMC component and/or EMD component for the motor, wherein the ground structure includes a conductive housing, an insulating cover; the insulating cover is provided with an EMC component and/or EMD component, and an conductive terminal connected to the EMC component and/or EMD component; the ground structure further includes a conductive cover; the first pin of the EMC component and/or ESD component is connected to the conductive terminal; the second pin of the EMC component and/or ESD component is located between the conductive housing and the conductive cover, such that the EMC component and/or ESD component can still be grounded stably even when the insulating cover is deformed because of temperature and vibration.