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    • 2. 发明申请
    • SYSTEM AND METHOD FOR GROUND FAULT DETECTION AND PROTECTION IN ADJUSTABLE SPEED DRIVES
    • 用于地面故障检测和可调节速度驱动器中的保护的系统和方法
    • US20130293988A1
    • 2013-11-07
    • US13464014
    • 2012-05-04
    • Huaqiang LiYakov Lvovich Familiant
    • Huaqiang LiYakov Lvovich Familiant
    • H02H7/08
    • H02H3/165H02H7/1227H02P29/0241H02P29/027
    • A system and method for detecting ground faults in an AC motor drive is disclosed. A fault detection and protection system for an AC motor drive includes current sensors to measure first and second phase output currents, a voltage sensor to measure a DC link voltage, and a desaturation control circuit to determine a voltage and associated current across PWM inverter switches for a third phase of the output. A controller compares the first and second phase currents, the measured DC link voltage, and the voltage across the PWM inverter switches on the third phase, to a plurality of thresholds. The controller detects a ground fault on one of the first, second, and third phases of the three phase output to the AC motor based on the comparisons of the first and the second phase currents, the DC link voltage, and the voltage across the switches to the thresholds.
    • 公开了一种用于检测交流电动机驱动器中的接地故障的系统和方法。 用于AC电动机驱动器的故障检测和保护系统包括用于测量第一和第二相输出电流的电流传感器,用于测量DC链路电压的电压传感器,以及去饱和控制电路,用于确定PWM逆变器开关上的电压和相关电流 第三阶段的输出。 控制器将第一相和第二相电流,所测量的直流链路电压以及第三相上的PWM逆变器开关上的电压相比较,以达到多个阈值。 控制器基于第一和第二相电流,直流链路电压和开关两端的电压的比较,检测到三相输出到交流电动机的第一相,第二相和第三相中的一个接地故障 到阈值。
    • 3. 发明授权
    • System for optimizing switching dead-time and method of making same
    • 优化切换死区时间的系统及其制作方法
    • US09166469B2
    • 2015-10-20
    • US13597552
    • 2012-08-29
    • Yakov Lvovich FamiliantHuaqiang LiXiaoling LiLeo Sun
    • Yakov Lvovich FamiliantHuaqiang LiXiaoling LiLeo Sun
    • H02M1/088H02M1/38H02M1/08
    • H02M1/38H02M1/08H02M1/088
    • A system for optimizing switching dead-time includes a power converter that includes a half-bridge circuit comprising a first switch coupled in series with a second switch, first and second state detection circuits respectively coupled to the first and second switches and configured to respectively detect an activation state of the first and second switches. First and second switch control circuits coupled respectively to the first and second switches are configured to respectively toggle the first and second switches between an activate state and a deactivated state. The first switch control circuit includes a first input configured to receive an activation signal from the second state detection circuit indicative of the activation state of the second switch, and the second switch control circuit includes a first input configured to receive an activation signal from the first state detection circuit indicative of the activation state of the first switch.
    • 用于优化切换死区时间的系统包括功率转换器,其包括半桥电路,该半桥电路包括与第二开关串联耦合的第一开关,第一和第二状态检测电路,分别耦合到第一和第二开关,并且被配置为分别检测 第一和第二开关的激活状态。 分别耦合到第一和第二开关的第一和第二开关控制电路被配置为分别在激活状态和去激活状态之间切换第一和第二开关。 第一开关控制电路包括被配置为从第二状态检测电路接收指示第二开关的启动状态的激活信号的第一输入,并且第二开关控制电路包括被配置为从第一开关接收激活信号的第一输入 指示第一开关的激活状态的状态检测电路。
    • 4. 发明申请
    • SYSTEM FOR OPTIMIZING SWITCHING DEAD-TIME AND METHOD OF MAKING SAME
    • 用于优化切换死区的系统及其制造方法
    • US20140063883A1
    • 2014-03-06
    • US13597552
    • 2012-08-29
    • Yakov Lvovich FamiliantHuaqiang LiXiaoling LiLeo Sun
    • Yakov Lvovich FamiliantHuaqiang LiXiaoling LiLeo Sun
    • H02M7/537
    • H02M1/38H02M1/08H02M1/088
    • A system for optimizing switching dead-time includes a power converter that includes a half-bridge circuit comprising a first switch coupled in series with a second switch, first and second state detection circuits respectively coupled to the first and second switches and configured to respectively detect an activation state of the first and second switches. First and second switch control circuits coupled respectively to the first and second switches are configured to respectively toggle the first and second switches between an activate state and a deactivated state. The first switch control circuit includes a first input configured to receive an activation signal from the second state detection circuit indicative of the activation state of the second switch, and the second switch control circuit includes a first input configured to receive an activation signal from the first state detection circuit indicative of the activation state of the first switch.
    • 用于优化切换死区时间的系统包括功率转换器,其包括半桥电路,该半桥电路包括与第二开关串联耦合的第一开关,第一和第二状态检测电路,分别耦合到第一和第二开关,并且被配置为分别检测 第一和第二开关的激活状态。 分别耦合到第一和第二开关的第一和第二开关控制电路被配置为分别在激活状态和去激活状态之间切换第一和第二开关。 第一开关控制电路包括被配置为从第二状态检测电路接收指示第二开关的启动状态的激活信号的第一输入,并且第二开关控制电路包括被配置为从第一开关接收激活信号的第一输入 指示第一开关的激活状态的状态检测电路。
    • 7. 发明授权
    • System and method for ground fault detection and protection in adjustable speed drives
    • 可调速驱动器中接地故障检测和保护的系统和方法
    • US09160161B2
    • 2015-10-13
    • US13464014
    • 2012-05-04
    • Huaqiang LiYakov Lvovich Familiant
    • Huaqiang LiYakov Lvovich Familiant
    • H02H7/08H02H3/16H02P29/02H02H7/122
    • H02H3/165H02H7/1227H02P29/0241H02P29/027
    • A system and method for detecting ground faults in an AC motor drive is disclosed. A fault detection and protection system for an AC motor drive includes current sensors to measure first and second phase output currents, a voltage sensor to measure a DC link voltage, and a desaturation control circuit to determine a voltage and associated current across PWM inverter switches for a third phase of the output. A controller compares the first and second phase currents, the measured DC link voltage, and the voltage across the PWM inverter switches on the third phase, to a plurality of thresholds. The controller detects a ground fault on one of the first, second, and third phases of the three phase output to the AC motor based on the comparisons of the first and the second phase currents, the DC link voltage, and the voltage across the switches to the thresholds.
    • 公开了一种用于检测交流电动机驱动器中的接地故障的系统和方法。 用于AC电动机驱动器的故障检测和保护系统包括用于测量第一和第二相输出电流的电流传感器,用于测量DC链路电压的电压传感器,以及去饱和控制电路,用于确定PWM逆变器开关上的电压和相关电流 第三阶段的输出。 控制器将第一相和第二相电流,所测量的直流链路电压以及第三相上的PWM逆变器开关上的电压相比较,以达到多个阈值。 控制器基于第一和第二相电流,直流链路电压和开关两端的电压的比较,检测到三相输出到交流电动机的第一相,第二相和第三相中的一个接地故障 到阈值。