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    • 4. 发明授权
    • Combination current hysteresis and voltage hysteresis control for a power converter
    • 电力转换器的组合电流滞后和电压滞后控制
    • US07417336B2
    • 2008-08-26
    • US10929689
    • 2004-08-31
    • James P. Johnson
    • James P. Johnson
    • H02J3/02H02H3/24H02M7/44
    • H02M7/53873H02J3/387H02J2001/004H02J2003/388H02M2001/007Y10T307/336Y10T307/391Y10T307/675
    • Consistent with an aspect of the present disclosure, a method is provided for controlling an AC signal, which is supplied to a load and selectively supplied to a utility grid. In response to a fault in the utility grid, the method includes decoupling the AC signal from the utility grid, and determining whether a voltage associated with the AC signal is within a desired band. The method also includes adjusting the voltage associated with the AC signal when the AC signal is outside the desired band, and comparing a magnitude of a current associated with the AC signal with a desired current value to thereby obtain a comparison result. In response to the comparison result, the current associated with the AC signal is adjusted when the voltage associated with the AC signal is within the desired band.
    • 根据本公开的一个方面,提供了一种用于控制AC信号的方法,其被提供给负载并选择性地提供给公用电网。 响应于公用电网中的故障,该方法包括将AC信号与公用电网分离,以及确定与AC信号相关联的电压是否在期望频带内。 该方法还包括当AC信号在期望频带之外时调整与AC信号相关联的电压,以及将与AC信号相关联的电流的大小与期望的电流值进行比较,从而获得比较结果。 响应于比较结果,当与AC信号相关联的电压在期望频带内时,与AC信号相关联的电流被调整。
    • 8. 发明授权
    • Line driver system
    • US4024501A
    • 1977-05-17
    • US609942
    • 1975-09-03
    • William M. HerringJames P. JohnsonDennis B. Walling
    • William M. HerringJames P. JohnsonDennis B. Walling
    • H04L12/40H04L25/26H04Q1/00
    • H04L12/40032H04L25/26
    • A line driver system for digital communication, using logic-level voltages, between an electronic transmitter-receiver device and an electronic receiver device, such as between a computer and a typewriter, a line printer or a cathode ray tube, has the transmitter-receiver device at a location remote from the receiver device. An output of the transmitter-receiver device is electronically coupled to an input of the receiver device using one line of a communications bus. This output of the transmitter-receiver device is coupled to that line of the bus through an optical isolator and then through a power booster. The receiver device has an output that provides a voltage signal when the receiver device is switched on-line. This voltage signal is provided at that output of the receiver device when the receiver device is capable of transforming digital information, that is provided at its input, to a readable form that is printed or displayed by the receiver device. This output of the receiver device is coupled through another optical isolator and through another power booster to a second line of the bus so that this second line of the bus receives a voltage signal when the receiver device is in the on-line condition. This second line of the bus is electronically coupled to an input of the transmitter-receiver device that senses the presence of this signal at that input prior to initiating a transmittal of digital information as logic-level voltages to the first line of the bus to provide logic-level voltages at the input of the receiver device. Each power booster has a high current gain amplifier with unity voltage gain. When the receiver device is also a transmitter device another output of the receiver device is electronically coupled through an optical isolator and a further power booster to a third line of the bus that is electronically coupled to another input of the transmitter-receiver device so that digital information as logic-level voltages are received from the receiver device by the transmitter-receiver device.