公开(公告)号：US06330143B1

公开(公告)日：2001-12-11

申请号：US09512480

申请日：2000-02-23

Applicant: Douglas Keith Maly ,  Chingchi Chen

Inventor： Douglas Keith Maly ,  Chingchi Chen

IPC: H02H318

CPC classification number: H03K17/0828 ,  H03K17/0826 ,  H03K2217/0027

Abstract: The present invention discloses a circuit and method for detecting a fault current in a circuit containing a power transistor. A comparator in communication with a parasitic inductance is utilized to sense the excessive change in current through the power transistor. When the voltage magnitude through the parasitic inductor exceeds a predefined limit, the comparator triggers a gate drive circuit. The gate drive circuit is in communication with the power transistor. The gate drive circuit shuts off the power transistor when the predefined limit is reached. Thus, the present invention is capable of reacting quickly to fault currents through the power transistor thereby protecting the transistor and other circuit components from damage.

Abstract translation: 本发明公开了一种用于检测包含功率晶体管的电路中的故障电流的电路和方法。 利用与寄生电感通信的比较器来感测通过功率晶体管的电流的过度变化。 当通过寄生电感的电压大小超过预定极限时，比较器触发栅极驱动电路。 栅极驱动电路与功率晶体管连接。 当达到预定极限时，门驱动电路关闭功率晶体管。 因此，本发明能够快速地对通过功率晶体管的故障电流进行反应，从而保护晶体管和其它电路部件免受损坏。

公开(公告)号：US5272616A

公开(公告)日：1993-12-21

申请号：US871500

申请日：1992-04-21

Applicant: Deepakraj M. Divan ,  Donald W. Novotny ,  Chingchi Chen

Inventor： Deepakraj M. Divan ,  Donald W. Novotny ,  Chingchi Chen

IPC: H02M5/14 ,  H02M5/458 ,  H02M5/293

CPC classification number: H02M5/458 ,  H02M5/14 ,  Y10S323/908

Abstract: An apparatus for converting single phase input power to three phase output power supplied to a motor includes a pair of input lines, and a pair of DC bus lines, a pair of capacitors, a pair of diodes, and a pair of controlled switching devices which are each connected between the DC bus lines. One of the input lines is connected to the node between the capacitors and the other input line is connected to the node between the diodes. Two output lines are connected to the input line and a third output line is connected to the node between the two switching devices, with the three output lines being connected to a motor to supply three phase power to the motor. The switching devices are switched in a pulse width modulated manner to provide a voltage between the third output line and the other two output lines which provides the three phase power. During motor startup, at least one startup capacitor is switched in between one or both of the input lines and the output lines to provide startup torque for the motor. This capacitor is switched out after the motor has been started. A capacitor may also be switched in between the two input lines during startup to reduce the in-rush current on the input lines. Conversion of single phase to three phase power is obtained with only two active switching devices and a simple control strategy.

Abstract translation: 用于将单相输入功率转换为提供给电动机的三相输出功率的装置包括一对输入线，一对DC总线，一对电容器，一对二极管和一对受控开关装置， 都连接在直流总线之间。 输入线之一连接到电容器之间的节点，另一条输入线连接到二极管之间的节点。 两个输出线连接到输入线，第三输出线连接到两个开关器件之间的节点，三条输出线连接到电动机，以向电动机提供三相电力。 切换装置以脉冲宽度调制方式切换，以在第三输出线和提供三相电源的其它两条输出线之间提供电压。 在电机起动期间，至少有一个起动电容器在一个或两个输入线路和输出线路之间切换，以提供电机的起动转矩。 电机起动后，该电容器被切断。 在启动期间，也可以在两个输入线之间切换电容器以减小输入线上的浪涌电流。 仅使用两个有源开关器件和简单的控制策略可以获得单相到三相功率的转换。

公开(公告)号：US09190896B2

公开(公告)日：2015-11-17

申请号：US13234684

申请日：2011-09-16

Applicant: Lihua Chen ,  Chingchi Chen ,  Michael W. Degner ,  Shahram Zarei

Inventor： Lihua Chen ,  Chingchi Chen ,  Michael W. Degner ,  Shahram Zarei

IPC: H02P1/04 ,  G05B11/28 ,  H02P27/04 ,  H02M1/32 ,  B60L3/00 ,  B60L11/00 ,  B60L11/14 ,  B60L11/18 ,  B60L15/00 ,  B60L15/20 ,  H02P27/08 ,  H02P29/00 ,  H02P29/02 ,  H02M7/5387 ,  H02M1/00

CPC classification number: H02M1/32 ,  B60L3/003 ,  B60L11/005 ,  B60L11/14 ,  B60L11/1887 ,  B60L15/007 ,  B60L15/2009 ,  B60L2210/40 ,  B60L2220/14 ,  B60L2240/423 ,  B60L2240/525 ,  B60L2240/527 ,  B60L2240/529 ,  H02M7/53871 ,  H02M2001/0054 ,  H02M2001/327 ,  H02P27/085 ,  H02P29/027 ,  H02P29/68 ,  Y02T10/644 ,  Y02T10/645 ,  Y02T10/70 ,  Y02T10/7022 ,  Y02T10/7077 ,  Y02T10/7241 ,  Y02T10/7275 ,  Y02T10/92 ,  Y02T90/34

Abstract: A PWM strategy can be implemented to reduce device power losses and hotspot temperature in an inverter circuit that drives a synchronous motor. A method includes migrating a phase current from a power device with higher losses to a power device with lower losses. A PWM modulation signal can be modified to alter the inverter duty cycle and migrate phase current in the direction of lower losses. As an example, a PWM reference signal can be shifted to a lower value. A PWM loss reduction strategy can be performed while a motor is in a rotor-lock state to reduce device hotspot temperature. The PWM loss reduction strategy can also be performed when a motor is operating in a normal state, pushing PWM to DPWM, reducing switching and overall losses. The strategy can be practiced while a PMSM is operating as a motor, and can also be practiced during regenerative braking.

Abstract translation: 可以实现PWM策略，以减少驱动同步电机的逆变器电路中的器件功率损耗和热点温度。 一种方法包括将具有较高损耗的功率器件的相电流迁移到具有较低损耗的功率器件。 可以修改PWM调制信号以改变反相器占空比，并在较低损耗的方向上迁移相电流。 作为示例，PWM参考信号可以被移位到较低的值。 当电机处于转子锁定状态以减少器件热点温度时，可以执行PWM损耗降低策略。 当电机工作在正常状态时，也可以执行PWM损耗降低策略，将PWM推向DPWM，降低开关损耗和总体损耗。 当PMSM作为电动机操作时，可以实施该策略，并且还可以在再生制动期间实施。

公开(公告)号：US08717788B2

公开(公告)日：2014-05-06

申请号：US13044655

申请日：2011-03-10

Applicant: Chingchi Chen ,  Michael W. Degner ,  Satish Thuta

Inventor： Chingchi Chen ,  Michael W. Degner ,  Satish Thuta

IPC: H02H7/122

CPC classification number: H02M1/15 ,  H02M2001/008

Abstract: A method and system for controlling a power converter system with a direct current (DC)-bus capacitor connected to at least a first converter and a second converter. The first converter is with associated first current and the second converter is with associated second current. Switching states of the first and second converters are determined. The switching states of the second converter are sequenced relative to the first converter to reduce a difference of sums of the associated first and second currents between adjacent time intervals.

Abstract translation: 一种用于利用连接到至少第一转换器和第二转换器的直流（DC）总线电容器来控制功率转换器系统的方法和系统。 第一转换器具有关联的第一电流，第二转换器具有相关联的第二电流。 确定第一和第二转换器的切换状态。 第二转换器的开关状态相对于第一转换器排序，以减少相邻时间间隔之间的相关联的第一和第二电流之和的差。

公开(公告)号：US20120230070A1

公开(公告)日：2012-09-13

申请号：US13044655

申请日：2011-03-10

Applicant: Chingchi Chen ,  Michael W. Degner ,  Satish Thuta

Inventor： Chingchi Chen ,  Michael W. Degner ,  Satish Thuta

IPC: H02H7/122

CPC classification number: H02M1/15 ,  H02M2001/008

Abstract: A method and system for controlling a power converter system with a direct current (DC)-bus capacitor connected to at least a first converter and a second converter. The first converter is with associated first current and the second converter is with associated second current. Switching states of the first and second converters are determined. The switching states of the second converter are sequenced relative to the first converter to reduce a difference of sums of the associated first and second currents between adjacent time intervals.

Abstract translation: 一种用于利用连接到至少第一转换器和第二转换器的直流（DC）总线电容器来控制功率转换器系统的方法和系统。 第一转换器具有关联的第一电流，第二转换器具有相关联的第二电流。 确定第一和第二转换器的切换状态。 第二转换器的开关状态相对于第一转换器排序，以减少相邻时间间隔之间的相关联的第一和第二电流之和的差。

公开(公告)号：US07646160B2

公开(公告)日：2010-01-12

申请号：US11796081

申请日：2007-04-26

Applicant: Chingchi Chen ,  Jin Wang ,  Michael W. Degner

Inventor： Chingchi Chen ,  Jin Wang ,  Michael W. Degner

IPC: H02P1/00

CPC classification number: G01R31/42

Abstract: In a multi-phase motor drive that includes a bus capacitor, a multi-phase motor, a multi-phase inverter, multiple switches each having an on-state and an off-state, and multiple current sensors each being in series with respective phase winding, a method for checking the accuracy of circuit parameters of the motor drive, including using the switches to produce a first loop that includes the capacitor bank, a first phase winding, a first current sensor, a second phase winding, and a second current sensor, using the current sensors to determine a magnitude of current in the first and second phase windings, comparing a magnitude of current indicated by the first current sensor and the second current sensor, and determining a magnitude of a difference between the current in the first and second phase windings.

Abstract translation: 在包括总线电容器，多相电动机，多相逆变器的多相电机驱动器中，具有导通状态和截止状态的多个开关以及各自与各相串联的多个电流传感器 包括使用开关产生包括电容器组的第一回路，第一相绕组，第一电流传感器，第二相绕组和第二电流的方法，用于检查电机驱动器的电路参数的精度的方法 传感器，使用电流传感器来确定第一和第二相绕组中的电流的大小，比较由第一电流传感器和第二电流传感器指示的电流的大小，以及确定第一和第二相绕组中的电流之间的差值的大小 和二相绕组。

公开(公告)号：US20080265819A1

公开(公告)日：2008-10-30

申请号：US11796081

申请日：2007-04-26

Applicant: Chingchi Chen ,  Jin Wang ,  Michael W. Degner

Inventor： Chingchi Chen ,  Jin Wang ,  Michael W. Degner

IPC: G01R31/02

CPC classification number: G01R31/42

Abstract: In a multi-phase motor drive that includes a bus capacitor, a multi-phase motor, a multi-phase inverter, multiple switches each having an on-state and an off-state, and multiple current sensors each being in series with respective phase winding, a method for checking the accuracy of circuit parameters of the motor drive, including using the switches to produce a first loop that includes the capacitor bank, a first phase winding, a first current sensor, a second phase winding, and a second current sensor, using the current sensors to determine a magnitude of current in the first and second phase windings, comparing a magnitude of current indicated by the first current sensor and the second current sensor, and determining a magnitude of a difference between the current in the first and second phase windings.

Abstract translation: 在包括总线电容器，多相电动机，多相逆变器的多相电机驱动器中，具有导通状态和截止状态的多个开关以及各自与各相串联的多个电流传感器 包括使用开关产生包括电容器组的第一回路，第一相绕组，第一电流传感器，第二相绕组和第二电流的方法，用于检查电机驱动器的电路参数的精度的方法 传感器，使用电流传感器来确定第一和第二相绕组中的电流的大小，比较由第一电流传感器和第二电流传感器指示的电流的大小，以及确定第一和第二相绕组中的电流之间的差值的大小 和二相绕组。

公开(公告)号：US06861835B2

公开(公告)日：2005-03-01

申请号：US10309793

申请日：2002-12-03

Applicant: Douglas K. Maly ,  Orrin B. West ,  Chingchi Chen

Inventor： Douglas K. Maly ,  Orrin B. West ,  Chingchi Chen

IPC: G01R31/26 ,  G01R7/00

CPC classification number: G01R31/261

Abstract: A non-invasive, non-destructive method and system for determining power transistor peak die voltage utilizes values for each of a plurality of parameters determined by measurement of external terminal voltages for any number of switches, such as transistors of an inverter. Stray inductance values are calculated and used with measured current gradient to calculate the peak die voltages for the switches. A refinement of the method determines transistor peak die voltage without measuring current.

Abstract translation: 用于确定功率晶体管峰值管芯电压的非侵入性，非破坏性方法和系统利用通过测量任何数量的开关（例如逆变器的晶体管）的外部端子电压的测量而确定的多个参数中的每一个的值。 计算杂散电感值，并与测量电流梯度一起使用，以计算开关的峰值电压。 该方法的改进确定晶体管峰值管芯电压，而不测量电流。

公开(公告)号：US06297661B1

公开(公告)日：2001-10-02

申请号：US09294071

申请日：1999-04-19

Applicant: Chingchi Chen ,  Venkateswara Anand Sankaran

Inventor： Chingchi Chen ,  Venkateswara Anand Sankaran

IPC: G01R3126

CPC classification number: G01R19/16528

Abstract: A system and method for detecting various fault conditions in semiconductor devices. A variable voltage reference is compared to the voltage output of the device during device turn-on to detect circuit fault conditions. The fault condition is then communicated to a controller.

Abstract translation: 一种用于检测半导体器件中的各种故障状况的系统和方法。 在器件导通期间，将可变参考电压与器件的电压输出进行比较，以检测电路故障状况。 然后将故障状况传送给控制器。

公开(公告)号：US5402053A

公开(公告)日：1995-03-28

申请号：US112609

申请日：1993-08-26

Applicant: Deepakraj M. Divan ,  Donald W. Novotny ,  Chingchi Chen

Inventor： Deepakraj M. Divan ,  Donald W. Novotny ,  Chingchi Chen

IPC: H02M5/14 ,  H02M5/293 ,  H02M5/458

CPC classification number: H02M5/458 ,  H02M5/14 ,  H02M5/293 ,  H02P1/265

Abstract: A converter, for providing three phase power to a three phase induction motor from a single phase supply, includes an inverter connected to the single phase input power lines which has two switching devices, and a bi-directional switch connected between one of the single phase input power and one output line to the motor. The other two outputs provided to the motor are a direct connection from the other AC input line and the output of the inverter. In a first or start-up mode of operation, the bi-directional switch and the inverter are controlled to provide currents to the motor which are at a fundamental frequency lower than the single phase AC input frequency to provide controlled start-up of the motor with limited in-rush current. After the motor has started, the converter may be switched to a second mode wherein the bi-directional switch is turned off and the inverter provides single phase power at increasing frequency to the motor to drive the motor up in speed. In a third mode, where the motor is at or near its rated speed, the hi-directional switch and the inverter may be operated to provide power at the rated frequency to the motor, but at variable and controllable voltage levels to control the speed of the motor. In a fourth mode, at or near the rated speed of the motor, the bi-directional switch is controlled to conduct constantly, and the inverter is operated to provide balanced three phase voltages to the motor. The converter may be implemented with only two switching devices in the inverter and one additional bi-directional switch.

Abstract translation: A转换器，用于从单相电源向三相感应电动机提供三相电力，包括连接到具有两个开关装置的单相输入电力线的逆变器，以及连接在单相之一之间的双向开关 输入电源和一条输出线到电机。 提供给电机的另外两个输出是与另一个交流输入线和逆变器的输出的直接连接。 在第一或启动操作模式下，控制双向开关和逆变器以向基于低于单相交流输入频率的基频提供电动机，以提供电动机的受控起动 具有有限的冲浪电流。 在电动机起动之后，转换器可以切换到第二模式，其中双向开关被关闭，并且逆变器以增加的频率向电动机提供单相功率以驱动电动机的速度。 在第三种模式中，在电动机处于或接近其额定转速的情况下，可以操作高频开关和逆变器以向电动机提供额定频率的功率，但是在可变和可控的电压电平下， 电机。 在第四种模式下，在马达额定转速或接近额定转速的情况下，双向开关被控制为恒定运行，并且逆变器被运行以向马达提供平衡的三相电压。 转换器可以在逆变器中仅使用两个开关器件和一个额外的双向开关来实现。