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    • 83. 发明申请
    • METHOD AND DEVICE FOR THE COMPUTER-ASSISTED OPERATION OF AN ELECTRIC MOTOR
    • WO2018108651A1
    • 2018-06-21
    • PCT/EP2017081614
    • 2017-12-06
    • SIEMENS AG
    • MITTELSTÄDT SEBASTIANMLYNEK JONASWEBER STEFAN HAGEN
    • H02P1/16H02P1/02H02P1/26H02P23/14H02P29/60
    • H02P1/16H02P1/029H02P1/26H02P23/14H02P29/60
    • The invention describes a method for the computer-assisted operation of an electric motor (M) which is exposed to a thermal load as a result of the rotational motion of its rotor (T) during operation. In this method, measured data is received during the operation of the electric motor (M). One or more temperature values are derived from the measured data. A number of temperature characteristics curves (TPi) are then forecast with differing restart times (t(TPi)) for defining a cooling period for reducing the thermal load on the electric motor (M), wherein the approximated temperature value, which results from the approximated temperature value is used as the specific starting value for a restart in the temperature characteristics curve (TPi) to be forecast. The temperature characteristics curve (TPi) lying in the past is visualised together with the number of forecast temperature characteristics curves (TPi) in a time-temperature graph, wherein the number of forecast temperature characteristics curves (TPi) represents a possible restart of the electric motor (M) at the particular restart time (t(TPi)) with the starting value determined in each case. A quality metric (GM) is determined for each of the number of forecast temperature characteristics curves (TPi). Finally, the quality metrics (GM) are mapped on a colour scale (20), which is visually output on a user interface, wherein, in response to a user interaction input via the user interface (13), time information for the restart of the electric motor (M) is output.
    • 87. 发明申请
    • METHOD AND SYSTEM FOR RIDE-THROUGH OF AN ADJUSTABLE SPEED DRIVE FOR VOLTAGE SAGS AND SHORT-TERM POWER INTERRUPTIONS
    • 用于电压串联和短期电源中断的可调节速度驱动器的方法和系统
    • WO99041830A1
    • 1999-08-19
    • PCT/US1999/003065
    • 1999-02-12
    • H02M5/458H02M7/217H02P27/08H02P7/62
    • H02P1/029H02M5/458H02M7/217H02M2001/0022H02P27/08
    • In one embodiment of the present invention, a system for ride-through of an adjustable speed drive for voltage sags is provided. The system comprises an adjustable speed drive including a three phase electric utility, a diode rectifier, a dc-link, an inverter, and a motor. Coupled to the adjustable speed drive is a ride-through circuit which includes a controller having a first input and a second input, the first input operable to receive the voltage from each phase of the three phase electric utility and determine the magnitude and phase of the voltage sag, and the second input operable to receive the dc-link voltage to ensure that the rated dc-link voltage is not exceeded. Also included is an IGBT coupled to an output of the controller and operable to switch on and off rapidly based on the amount of voltage sag. An inductor associated with the IGBT and operable to store energy when the IGBT is switched on and to transfer energy to the dc-link when the IGBT is off is also included. This maintains the dc-link voltage to provide ride-through operation of the adjustable speed drive.
    • 在本发明的一个实施例中,提供了一种用于电压骤降的可调速驱动器的穿越系统。 该系统包括可调速驱动器,其包括三相电力公司,二极管整流器,直流链路,逆变器和电动机。 耦合到可调速驱动器是一种穿越电路,其包括具有第一输入和第二输入的控制器,第一输入可操作以从三相电力公用设施的每个相接收电压,并且确定 电压骤降​​,第二输入可操作以接收直流链路电压,以确保不超过额定直流链路电压。 还包括耦合到控制器的输出端并且可操作以基于电压暂降量快速接通和断开的IGBT。 与IGBT相关联的电感器,并且可以用于在IGBT导通时存储能量并且在IGBT关断时将能量传递到dc链路。 这保持了直流链路电压以提供可调速驱动器的穿越操作。