发明授权
US07453222B2 Sun roof drive device 有权
太阳屋顶驱动装置

Sun roof drive device
摘要:
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.
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