Position detecting apparatus having electric motor and method for detecting position
AssigneesDenso Corporation, Nippon Soken, Inc.
InventorsKiyoshi Kimura, Taku Itoh, Shigeru Yoshiyama, Masashi Hori
Life of this patent
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Abstract
A reference position detecting apparatus includes an electric motor and a motor control unit. The electric motor includes a plurality of first coils and a plurality of second coils. The electric motor further includes a rotor that rotates when at least one of the plurality of first coils and the plurality of second coils is supplied with electricity. The motor control unit controls electricity supplied to either one of the plurality of first coils and the plurality of second coils to rotate the rotor to a limit position in a movable range of an object.
Claims15
A reference position detecting apparatus comprising:
- an electric motor that includes a coil device and a rotor, the rotor rotating when the coil device is supplied with electricity;
- a driven object that is driven by the rotating rotor;
- a tapping control unit that performs a tapping control, in which the rotor rotates to a limit position on one side in a movable range of the driven object;
- and
- a reference position recognizing unit that defines a point, at which rotation of the rotor stops, as a reference position of one of the rotor and the driven object during the tapping control,
- wherein the tapping control unit performs a duty control with respect to electricity supplied to the coil device such that an amount of electricity flowing through the coil device becomes substantially constant during the tapping control.
A reference position detecting apparatus comprising:
- an electric motor that includes a coil device and a rotor, the rotor rotating when the coil device is supplied with electricity;
- a driven object that is driven by the rotating rotor;
- a tapping control unit that performs a tapping control, in which the rotor rotates to a limit position on one side in a movable range of the driven object;
- and
- a reference position recognizing unit that defines a point, at which rotation of the rotor stops, as a reference position of one of the rotor and the driven object during the tapping control,
- wherein the tapping control unit performs a duty control with respect to electricity supplied to the coil device in accordance with speed of the rotor such that output torque of the rotor becomes substantially constant during the tapping control.
Dependencies are inferred from the claim text.