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    • 4. 发明授权
    • Moving driving device of camera
    • 移动相机的驱动装置
    • US4849779A
    • 1989-07-18
    • US169449
    • 1988-03-17
    • Kouji YamamotoShinji TominagaAkira YamanakaHiroshi UedaNobuyuki TaniguchiIkushi NakamuraMichihiro Iwata
    • Kouji YamamotoShinji TominagaAkira YamanakaHiroshi UedaNobuyuki TaniguchiIkushi NakamuraMichihiro Iwata
    • G03B7/091G03B7/16G03B15/05G03B17/42G03B1/00
    • G03B17/425G03B15/05G03B7/091G03B7/16G03B2215/0503
    • The motor drive device according to the present invention drives a motor until a hold signal disappears and the motor is braked when the holding signal disappears. After a predetermined period from the time when the holding signal disappears, it is detected whether or not a completion position signal representing that the load has reached the normal complete position is output. If the completion position signal is not output, the motor is started again. The load is driven until the load reaches the position where the completion position signal is output, and then the motor is braked. Thus the load can be stopped at the correct position. Also, with the motor drive device according to the present invention, the motor may be braked after the load is driven by a predetermined amount. After a predetermined period has passed therefrom, it is detected whether or not a signal representing that the load is normally driven is output, and if the signal is not ouput, the motor is started again. The load is driven until the signal is output and then the motor is braked. Thus, the load can be correctly driven.
    • 根据本发明的电机驱动装置驱动马达直到保持信号消失,并且当保持信号消失时马达被制动。 在保持信号消失之后的预定时间段之后,检测出表示负载已达到正常完成位置的完成位置信号是否被输出。 如果未输出完成位置信号,则电机再次启动。 负载被驱动直到负载到达完成位置信号输出的位置,然后电动机被制动。 因此,负载可以停在正确的位置。 此外,根据本发明的电动机驱动装置,在负载被驱动预定量之后,电动机可以被制动。 在经过预定时间之后,检测是否输出表示负载正常驱动的信号,如果信号不输出,则电动机再起动。 负载被驱动直到信号输出,然后马达被制动。 因此,可以正确地驱动负载。