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    • 92. 发明申请
    • SYSTEM AND METHOD TO DETERMINE ELECTRIC MOTOR EFFICIENCY NONINTRUSIVELY
    • 确定电机效率非系统性的系统和方法
    • US20080300827A1
    • 2008-12-04
    • US12132151
    • 2008-06-03
    • Bin LuThomas G. HabetlerRonald G. Harley
    • Bin LuThomas G. HabetlerRonald G. Harley
    • G01R31/34
    • G01R31/343H02P23/14
    • A system and method for nonintrusively determining electric motor efficiency includes a processor programmed to, while the motor is in operation, determine a plurality of stator input currents, electrical input data, a rotor speed, a value of stator resistance, and an efficiency of the motor based on the determined rotor speed, the value of stator resistance, the plurality of stator input currents, and the electrical input data. The determination of the rotor speed is based on one of the input power and the plurality of stator input currents. The determination of the value of the stator resistance is based on at least one of a horsepower rating and a combination of the plurality of stator input currents and the electrical input data. The electrical input data includes at least one of an input power and a plurality of stator input voltages.
    • 用于非侵入性地确定电动机效率的系统和方法包括:处理器,被编程为在电动机处于运行状态时,确定多个定子输入电流,电输入数据,转子速度,定子电阻值,以及 电机基于确定的转子速度,定子电阻值,多个定子输入电流和电气输入数据。 转子速度的确定基于输入功率和多个定子输入电流之一。 定子电阻的值的确定基于马力额定值和多个定子输入电流和电输入数据的组合中的至少一个。 电输入数据包括输入功率和多个定子输入电压中的至少一个。
    • 95. 发明授权
    • EMI noise reduction circuit and method for bridgeless PFC circuit
    • EMI降噪电路和无桥PFC电路的方法
    • US07215560B2
    • 2007-05-08
    • US11301464
    • 2005-12-13
    • Marco SoldanoBin Lu
    • Marco SoldanoBin Lu
    • H02M1/12H02M7/12
    • H02M1/4225H02M1/44H02M3/1584Y02B70/126
    • A circuit and method for improving EMI noise performance in a bridgeless PFC boost converter. Such a converter comprises a boost inductor having a first end connected to a first AC input terminal and a second end connected to a first junction defined between the anode of a first diode and a first terminal of a first switch; a second terminal of the first switch connected to a common line; a parallel circuit of a capacitance and a load connected between the cathode of the first diode and the common line; a series circuit of a second diode and a second switch connected between the cathode of the first diode and the common line; and a second AC input terminal connected to a second junction defined between the anode of the second diode and the second switch. High-frequency EMI noise is bypassed by placing a first filter capacitor between the first AC terminal and the common line. A second boost inductor may be connected between the second AC input terminal and the second junction, and a second filter capacitor may be connected between the second AC terminal and the common line. The first and/or second filter capacitor has a lower impedance in a high frequency range than the corresponding first or second boost inductor. Preferably the first and second capacitors have substantially the same capacitance.
    • 一种用于提高无桥PFC升压转换器EMI噪声性能的电路和方法。 这种转换器包括升压电感器,其具有连接到第一AC输入端子的第一端和连接到第一二极管的阳极和第一开关的第一端子之间限定的第一结的第二端; 第一开关的第二端子连接到公共线; 连接在第一二极管的阴极和公共线之间的电容和负载的并联电路; 连接在第一二极管的阴极和公共线之间的第二二极管和第二开关的串联电路; 以及第二AC输入端子,其连接到限定在所述第二二极管的阳极和所述第二开关之间的第二连接点。 通过在第一AC端子和公共线路之间放置第一滤波电容器来绕过高频EMI噪声。 第二升压电感器可以连接在第二AC输入端子和第二连接点之间,并且第二滤波电容器可以连接在第二AC端子和公共线路之间。 第一和/或第二滤波电容器在高频范围内具有比相应的第一或第二升压电感器更低的阻抗。 优选地,第一和第二电容器具有基本相同的电容。