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    • 35. 发明申请
    • ROTARY MACHINE CONTROL
    • 旋转机控制
    • WO02041485A1
    • 2002-05-23
    • PCT/SE2001/002137
    • 2001-10-03
    • H02P1/26H02P3/18H02P23/08
    • H02P3/18H02P1/26H02P23/08
    • The present invention discloses devices and methods for improved starting and stopping of rotary motors. A rotary electrical machine (3) is supplied with a voltage from a voltage supply (10). The magnitude of a phase current is measured. The measured cuurent value (IM) and applied voltage (U) is compared with what is expected for a predetermined target slip (ST), by means of a relation between phase current, applied voltage and slip. The comparison gives a discrepancy value, which is used to create a regulation signal ( DELTA U) to the voltage supply (10). To start and stop the machine, the target slip is increased and decreased, respectively, in a predetermined manner. The means for regulation may be provided as a separate add-on unit to existing soft starter equipment.
    • 本发明公开了一种用于改善旋转马达的起动和停止的装置和方法。 旋转电机(3)被供给来自电压源(10)的电压。 测量相电流的大小。 通过相电流,施加电压和滑差之间的关系,将测量的真值(IM)和施加电压(U)与期望的预定目标滑差(ST)进行比较。 该比较给出了差异值,其用于产生对电压源(10)的调节信号(DELTA U)。 为了启动和停止机器,目标滑移分别以预定的方式增加和减小。 调节装置可以作为单独的附加单元提供给现有的软启动器设备。
    • 36. 发明申请
    • CONTROLLING DEVICE FOR ELECTRIC MOTORS
    • 电动马达控制装置
    • WO1993017490A1
    • 1993-09-02
    • PCT/SE1993000122
    • 1993-02-17
    • CWEJMAN, Wlodzimierz
    • H02P07/628
    • H02P23/08
    • Device for controlling electric motors of the asynchronous motor type operated by means of three-phase alternating current. For producing the operating current of the motor (5) a voltage-controlled oscillator (2) is foreseen and a generator (4, 6) controlled by the same and conditionally fed from a direct current source (1). The control device (3, 7, 8) is arranged to receive the pulse which arises upon operation of the motor (5) in its feed conductors (10-12) for alternating current and is thereby arranged to detect changes in the pulse shape of the operating voltage which occur due to electromotive forces induced from the motor windings when these are passed by the induced field of the rotor. These changes vary with the size of the slip. On the basis of the level of said deviations, a proportional voltage is induced which is transferred to the oscillator for its frequency control. With changes in the rotational torque loading on the motor, the control voltage is thereby changed and also the frequency of the oscillator and consequently the rotational speed of the motor, so that an adaptation to the operating resistance is obtained.
    • 用于控制通过三相交流电操作的异步电动机类型的电动机的装置。 为了产生电动机(5)的工作电流,可以预见压控振荡器(2)和发电机(4,6)由相同的控制并有条件地从直流电源(1)馈送。 控制装置(3,7,8)被布置为接收在其馈电导体(10-12)中为了交流电而在马达(5)的操作时产生的脉冲,并且由此布置成检测脉冲形状的变化 当由转子的感应场通过时,由电动机绕组引起的电动势产生的工作电压。 这些变化随滑差的大小而变化。 基于所述偏差的电平,引起比例电压,其被传送到振荡器进行频率控制。 随着马达上的旋转扭矩负载的变化,控制电压因此改变,并且振荡器的频率以及因此电动机的转速,从而获得适应于工作电阻。