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    • 5. 发明授权
    • Electronic braking system for power press die change carriers
    • 电动刹车系统
    • US5113684A
    • 1992-05-19
    • US601338
    • 1990-10-22
    • Eugene A. Oster
    • Eugene A. Oster
    • B21D37/14B21J13/08B30B15/02B60L7/00B60L9/16
    • B21D37/14B21J13/085B30B15/028Y10S100/918
    • The invention provides an automatic die changing system for a power press with at least one carrier for transporting dies to and from a selected location in the press. The carrier is supported on a set of wheels, which are driven by at least one AC induction motor. An adjustable frequency AC motor drive supplies an AC frequency and voltage to the AC induction motor to control the speed of the motor and therefore the speed of a horizontal movement of the carrier into or out of the press. The speed of the carrier may be rapidly increased by increasing the AC frequency supplied to the motor on the individual wheels. A proximity detector signals the motor drive to trip a dynamic braking resistor, which electronically changes the phase order of the motors to reverse the direction of motor rotation, to decelerate the carrier in order to locate the carrier in the proper position.
    • 本发明提供了一种用于动力式压力机的自动模具更换系统,该系统具有至少一个用于将压模传送到压机中的选定位置的模具的载体。 载体支撑在由至少一个AC感应电动机驱动的一组轮上。 可变频率交流电动机驱动器为交流感应电动机提供交流频率和电压,以控制电动机的速度,并因此控制承载件进出压力机的水平运动速度。 通过增加在各个车轮上提供给马达的交流频率,可以快速增加载体的速度。 接近检测器用信号通知电机驱动器以动态制动电阻器,该电动机电动地改变电动机的相位顺序以反转电动机的旋转方向,以使载体减速,以将载体定位在适当位置。