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    • 1. 发明授权
    • Gate voltage modulation for transistor fault conditions
    • 晶体管故障条件的栅极电压调制
    • US5892643A
    • 1999-04-06
    • US888825
    • 1997-07-07
    • Albert Andreas Maria EsserLee Burton SilverthornLyle Thomas Keister
    • Albert Andreas Maria EsserLee Burton SilverthornLyle Thomas Keister
    • H03K17/082H03K17/16H02H7/00
    • H03K17/0828H03K17/166H03K17/168
    • A power device control system includes a power device having an input gate and first and second output terminals, a controller, and a gate driver for supplying current to the input gate of the power device, comparing a voltage difference between the first and second output terminals, and providing a comparator signal to the controller if the voltage difference is greater than or equal to a predetermined maximum voltage difference. The controller is capable of providing a command signal to the gate driver and pulse width modulating the command signal upon receiving a comparator signal from the gate driver to gradually switch off the power device. The control system can further include a current sensor coupled between one of the first and second output terminals and the controller for supplying a current signal and an integrated current signal to the controller. The control system can be capable of variably pulse width modulating the command signal, and, in one embodiment, the modulation process includes varying on/off switching of the command signal to increase a percentage of off time during subsequent periods of modulation.
    • 功率器件控制系统包括具有输入栅极和第一和第二输出端子的功率器件,控制器和用于向功率器件的输入栅极提供电流的栅极驱动器,比较第一和第二输出端子之间的电压差 并且如果电压差大于或等于预定的最大电压差,则向控制器提供比较器信号。 控制器能够向栅极驱动器提供命令信号,并且在从栅极驱动器接收到比较器信号以逐渐关闭功率器件时,对命令信号进行脉宽调制。 控制系统还可以包括耦合在第一和第二输出端子之一之间的电流传感器和用于向控制器提供电流信号和积分电流信号的控制器。 控制系统能够以可变的方式对命令信号进行脉宽调制,并且在一个实施例中,调制过程包括改变命令信号的接通/断开切换以增加随后调制周期期间的关断时间百分比。
    • 2. 发明授权
    • Gate voltage modulation for transistor fault conditions
    • 晶体管故障条件的栅极电压调制
    • US5689394A
    • 1997-11-18
    • US566494
    • 1995-12-04
    • Albert Andreas Maria EsserLee Burton SilverthornLyle Thomas Keister
    • Albert Andreas Maria EsserLee Burton SilverthornLyle Thomas Keister
    • H03K17/082H03K17/16H02H9/00
    • H03K17/0828H03K17/166H03K17/168
    • A power device control system includes a power device having an input gate and first and second output terminals, a controller, and a gate driver for supplying current to the input gate of the power device, comparing a voltage difference between the first and second output terminals, and providing a comparator signal to the controller if the voltage difference is greater than or equal to a predetermined maximum voltage difference. The controller is capable of providing a command signal to the gate driver and pulse width modulating the command signal upon receiving a comparator signal from the gate driver to gradually switch off the power device. The control system can further include a current sensor coupled between one of the first and second output terminals and the controller for supplying a current signal and an integrated current signal to the controller. The control system can be capable of variably pulse width modulating the command signal, and, in one embodiment, the modulation process includes varying on/off switching of the command signal to increase a percentage of off time during subsequent periods of modulation.
    • 功率器件控制系统包括具有输入栅极和第一和第二输出端子的功率器件,控制器和用于向功率器件的输入栅极提供电流的栅极驱动器,比较第一和第二输出端子之间的电压差 并且如果电压差大于或等于预定的最大电压差,则向控制器提供比较器信号。 控制器能够向栅极驱动器提供命令信号,并且在从栅极驱动器接收到比较器信号以逐渐关闭功率器件时,对命令信号进行脉宽调制。 控制系统还可以包括耦合在第一和第二输出端子之一之间的电流传感器和用于向控制器提供电流信号和积分电流信号的控制器。 控制系统能够以可变的方式对命令信号进行脉宽调制,并且在一个实施例中,调制过程包括改变命令信号的接通/断开切换以增加随后调制周期期间的关断时间百分比。
    • 5. 发明授权
    • Active damping control for active power filter
    • 有源电力滤波器的主动阻尼控制
    • US5691626A
    • 1997-11-25
    • US474212
    • 1995-06-07
    • Albert Andreas Maria EsserPaul Michael SzczesnyJeffrey Joseph NasadoskiRobert Joseph BastianPeter Claudius Sanza
    • Albert Andreas Maria EsserPaul Michael SzczesnyJeffrey Joseph NasadoskiRobert Joseph BastianPeter Claudius Sanza
    • H02J3/01H02J3/18G05F3/00G05F1/70
    • H02J3/1835H02J3/01Y02E40/22
    • An active damping control device for an active power filter includes a filter circuit having an inductor and a capacitor for suppressing noise in the active power filter; a first current sensor for sensing a three phase capacitor current of the filter capacitor; a second current sensor for detecting a three phase load current; and an active power filter controller for extracting the fundamentals of the capacitor and load currents and calculating a reference current for the active power filter. The active power filter controller can include a phase locked loop device or a notch filter for receiving a grid voltage and providing a corresponding voltage angle; first and second discrete fourier transform devices for using the voltage angle and the capacitor and load currents for extracting the fundamentals of the capacitor and load currents, respectively, and providing respective first and second output currents; and a subtractor for subtracting the first output current from the second output current to obtain the reference current. The active power filter can further include, situated between the first discrete fourier transform device and the subtractor, a multiplier for multiplying the first output current by a predetermined factor and a high pass filter for filtering the first output current. The filter circuit can include a circuit breaker coupling the inductor, the capacitor, and the first current sensor to the load for providing overcurrent protection to the filter circuit.
    • 一种有源电力滤波器的主动阻尼控制装置,包括具有用于抑制有源电力滤波器中的噪声的电感器和电容器的滤波电路; 用于感测滤波电容器的三相电容器电流的第一电流传感器; 用于检测三相负载电流的第二电流传感器; 以及有源电力滤波器控制器,用于提取电容器的基本原理和负载电流,并计算有功功率滤波器的参考电流。 有源电力滤波器控制器可以包括锁相环装置或陷波滤波器,用于接收电网电压并提供对应的电压角; 第一和第二离散傅里叶变换装置,分别使用电压角和电容器和负载电流分别提取电容器的基本面和负载电流,并提供相应的第一和第二输出电流; 以及用于从第二输出电流减去第一输出电流以获得参考电流的减法器。 有源电力滤波器可以进一步包括位于第一离散傅里叶变换装置和减法器之间的乘法器,用于将第一输出电流乘以预定因子,以及用于过滤第一输出电流的高通滤波器。 滤波器电路可以包括将电感器,电容器和第一电流传感器耦合到负载的断路器,以向滤波器电路提供过电流保护。
    • 8. 发明授权
    • Bidirectional buck boost converter
    • 双向降压升压转换器
    • US5734258A
    • 1998-03-31
    • US657249
    • 1996-06-03
    • Albert Andreas Maria Esser
    • Albert Andreas Maria Esser
    • H02M3/158G05F3/16
    • H02M3/1582B60L2210/14Y02T10/7225
    • A bidirectional buck boost converter and method of operating the same allows regulation of power flow between first and second voltage sources in which the voltage level at each source is subject to change and power flow is independent of relative voltage levels. In one embodiment, the converter is designed for hard switching while another embodiment implements soft switching of the switching devices. In both embodiments, first and second switching devices are serially coupled between a relatively positive terminal and a relatively negative terminal of a first voltage source with third and fourth switching devices serially coupled between a relatively positive terminal and a relatively negative terminal of a second voltage source. A free-wheeling diode is coupled, respectively, in parallel opposition with respective ones of the switching devices. An inductor is coupled between a junction of the first and second switching devices and a junction of the third and fourth switching devices. Gating pulses supplied by a gating circuit selectively enable operation of the switching devices for transferring power between the voltage sources. In the second embodiment, each switching device is shunted by a capacitor and the switching devices are operated when voltage across the device is substantially zero.
    • 双向降压升压转换器及其操作方法允许调节第一和第二电压源之间的功率流,其中每个源的电压电平可能发生变化,功率流量与相对电压电平无关。 在一个实施例中,转换器被设计用于硬切换,而另一个实施例实现了开关器件的软开关。 在两个实施例中,第一和第二开关器件串联耦合在第一电压源的相对正极端子和相对负极端子之间,其中第三和第四开关器件串联耦合在第二电压源的相对正极端子和相对负极端子之间 。 分别与相应的开关装置并联地连接续流二极管。 电感器耦合在第一和第二开关器件的结和第三和第四开关器件的结点之间。 由选通电路提供的门控脉冲选择性地使得开关装置的操作能够在电压源之间传递功率。 在第二实施例中,每个开关器件由电容器分流,并且当器件上的电压基本上为零时,开关器件被操作。