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US 2007/0182218 A1Published application
Sun roof drive device
AssigneesShinano Kenshi Co., Ltd., Yachiyo Kogyo Kabushiki Kaisha
InventorsTakashi Kanai, Takahiro Maruyama, Yutaka Nagai, Munehiro Kawai, Yoshikazu Ito
Life of this patent
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Abstract
The sun roof drive device opens and closes a vehicle sun roof by a DC brushless motor, which is driven by rectangular waves when high torque is required at a low rotational speed and which is driven by sinusoidal waves or pseudo-sinusoidal waves when low noise is required.
Claims9
A sun roof drive device for opening and closing a vehicle sun roof, comprising:
- a DC blushless motor acting as a drive source;
- a motor drive unit for switching drive voltage, which is applied to stator coils on the basis of a rotational position of a rotor detected by a magnetic sensor for detecting pole positions of a rotor magnet;
- a control unit controlling the opening and closing actions of the vehicle sun roof, with said motor drive unit, on the basis of a detection signal of the magnetic sensor;
- and
- a push-pull mechanism pushing and pulling a push-pull means, which is linked with said DC brushless motor by a speed reduction unit.
2 more elements
Dependencies are inferred from the claim text.