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公开(公告)号：US08653823B2
公开(公告)日：2014-02-18
申请号：US13152360
申请日：2011-06-03
IPC分类号： G01R31/08
CPC分类号： H02M1/32
摘要： A system for the detection of welded contacts in a circuit of a line converter system has a plurality of inverter switches, a plurality of utility switches in which a pair of utility switches is connected in series through a line to a utility, a voltage detector, an electronic controller, and a DC input source. The line converter system converts incoming DC power into AC output power that is delivered to the utility grid. The voltage detector measures the voltage across a first node and a second node of the circuit and provides an output that is interpreted by an electronic controller for each step performed during a method of detection of welded contacts. The detection method has a sequence of test steps in which at least one switch is opened and/or closed, a DC bus of the inverter or the utility grid is used as a stimulus voltage, and the voltage is measured. If a voltage is not detected across the first and second nodes, the test sequence is continued until a welded contact is detected or the electronic controller determines that none of the contacts are welded. If the controller determines that none of the contacts are welded, the line converter system is permitted to connect and supply AC power to the utility.
摘要翻译： 用于检测线路转换器系统的电路中的焊接触点的系统具有多个逆变器开关，多个效用开关，其中一对效用开关通过线路串联连接到公用设施，电压检测器， 电子控制器和DC输入源。 线路转换器系统将输入的直流电力转换成交付输出功率，并输送到公用电网。 电压检测器测量电路的第一节点和第二节点上的电压，并提供由电子控制器解释的输出，用于在焊接触点的检测方法期间执行的每个步骤。 检测方法具有一系列测试步骤，其中至少一个开关被打开和/或关闭，逆变器或公用电网的DC总线用作激励电压，并且测量电压。 如果在第一和第二节点之间没有检测到电压，则继续测试序列直到检测到焊接接触点，或者电子控制器确定没有焊接接触点。 如果控制器确定没有一个触点被焊接，则允许线路转换器系统连接并向公用设施提供AC电力。
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公开(公告)号：US20110299312A1
公开(公告)日：2011-12-08
申请号：US13151766
申请日：2011-06-02
IPC分类号： H02M7/5387
CPC分类号： H02M7/487 , H02J3/383 , Y02E10/563
摘要： A full-bridge, NPC inverter uses pulse width modulation (PWM) to convert the DC voltage from a solar panel array to an AC voltage at the output of the inverter that is acceptable for connection to a utility. The PWM control unit has a predetermined carrier frequency. The carrier unit uses for each carrier period either positive or negative values of a reference voltage to generate a predetermined number of signals to control the switching on and off of each of the eight inverter switching elements in a predetermined pattern for a predetermined period of the carrier frequency period to thereby produce the acceptable alternating current voltage at the inverter output and not produce between the inverter input and earth ground a carrier frequency component.
摘要翻译： 全桥NPC逆变器使用脉冲宽度调制（PWM）将来自太阳能电池板阵列的直流电压转换为连接到公用设施可接受的逆变器输出端的交流电压。 PWM控制单元具有预定的载波频率。 载波单元在每个载波周期使用参考电压的正值或负值，以产生预定数量的信号，以在载波的预定时段内以预定模式控制八个逆变器开关元件中的每一个的开关 从而在逆变器输出端产生可接受的交流电压，并且不会在变频器输入和接地之间产生载波频率分量。
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公开(公告)号：US20110298470A1
公开(公告)日：2011-12-08
申请号：US13152360
申请日：2011-06-03
IPC分类号： G01R31/08
CPC分类号： H02M1/32
摘要： A system for the detection of welded contacts in a circuit of a line converter system has a plurality of inverter switches, a plurality of utility switches in which a pair of utility switches is connected in series through a line to a utility, a voltage detector, an electronic controller, and a DC input source. The line converter system converts incoming DC power into AC output power that is delivered to the utility grid. The voltage detector measures the voltage across a first node and a second node of the circuit and provides an output that is interpreted by an electronic controller for each step performed during a method of detection of welded contacts. The detection method has a sequence of test steps in which at least one switch is opened and/or closed, a DC bus of the inverter or the utility grid is used as a stimulus voltage, and the voltage is measured. If a voltage is not detected across the first and second nodes, the test sequence is continued until a welded contact is detected or the electronic controller determines that none of the contacts are welded. If the controller determines that none of the contacts are welded, the line converter system is permitted to connect and supply AC power to the utility.
摘要翻译： 用于检测线路转换器系统的电路中的焊接触点的系统具有多个逆变器开关，多个效用开关，其中一对效用开关通过线路串联连接到公用设施，电压检测器， 电子控制器和DC输入源。 线路转换器系统将输入的直流电力转换成交付输出功率，并输送到公用电网。 电压检测器测量电路的第一节点和第二节点上的电压，并提供由电子控制器解释的输出，用于在焊接触点的检测方法期间执行的每个步骤。 检测方法具有一系列测试步骤，其中至少一个开关被打开和/或关闭，逆变器或公用电网的DC总线用作激励电压，并且测量电压。 如果在第一和第二节点之间没有检测到电压，则继续测试序列直到检测到焊接接触点，或者电子控制器确定没有焊接接触点。 如果控制器确定没有一个触点被焊接，则允许线路转换器系统连接并向公用设施提供AC电力。
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公开(公告)号：US06741059B2
公开(公告)日：2004-05-25
申请号：US10200689
申请日：2002-07-22
IPC分类号： H02P736
摘要： The direct torque control (DTC) principle is used to control the torque of a wound ring rotor slip induction machine, also known as a doubly fed or cascade machine, by utilizing a solid state inverter on the rotor side. In addition, the DTC principle is used to control the power factor at the stator terminals of the doubly fed machine to a desired level and also to perform the task of synchronization of stator voltage to the grid voltage. An integrated controller is used to implement these three functions.
摘要翻译： 直接转矩控制（DTC）原理用于通过在转子侧利用固态逆变器来控制绕线环转子滑动感应电机的扭矩，也称为双馈或级联机。 此外，DTC原理用于将双馈机器的定子端子的功率因数控制在所需水平，并且还执行定子电压与电网电压同步的任务。 使用集成控制器来实现这三个功能。
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公开(公告)号：US06448735B1
公开(公告)日：2002-09-10
申请号：US09842998
申请日：2001-04-26
IPC分类号： H02P736
摘要： The direct torque control (DTC) principle is used to control the torque of a wound ring rotor slip induction machine, also known as a doubly fed or cascade machine, by utilizing a solid state inverter on the rotor side. In addition, the DTC principle is used to control the power factor at the stator terminals of the doubly fed machine to a desired level and also to perform the task of synchronization of stator voltage to the grid voltage. An integrated controller is used to implement these three functions.
摘要翻译： 直接转矩控制（DTC）原理用于通过在转子侧利用固态逆变器来控制绕线环转子滑动感应电机的扭矩，也称为双馈或级联机。 此外，DTC原理用于将双馈机器的定子端子的功率因数控制在所需水平，并且还执行定子电压与电网电压同步的任务。 使用集成控制器来实现这三个功能。
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公开(公告)号：US06965290B2
公开(公告)日：2005-11-15
申请号：US10635271
申请日：2003-08-06
CPC分类号： H01F3/14 , H01F38/023 , H02M1/126 , Y10T29/4902 , Y10T29/49069 , Y10T29/49075 , Y10T29/49078
摘要： Non-linear inductor(s) are used to reduce the percent total harmonic distortion of the harmonics in the line currents in the input side rectifier system of an ac drive system. Several constructions for the non-linear inductor(s) are described. The non-linear inductor(s) may be constructed from E and I laminations. The gap depends on the construction of the middle leg of the E laminations and may have a step with a constant spacing or a variable spacing which depends on the stacking of the laminations. Alternatively the non-linear inductor(s) may be constructed from a toriodal core that either has a step gap or a variable type gap.
摘要翻译： 非线性电感用于降低交流驱动系统输入侧整流系统中线路电流中谐波的总谐波失真百分比。 描述了用于非线性电感器的若干结构。 非线性电感器可以由E和I叠层构成。 间隙取决于E叠片的中间腿的结构，并且可以具有取决于叠片的堆叠的恒定间隔或可变间隔的台阶。 或者，非线性电感器可以由具有阶跃间隙或可变型间隙的环形磁芯构成。
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7.发明授权Method and apparatus for minimizing torque ripple in a DC brushless motor using phase current overlap 失效在使用相电流重叠的直流无刷电机中使转矩波动最小化的方法和装置
公开(公告)号：US5672944A
公开(公告)日：1997-09-30
申请号：US735150
申请日：1996-10-22
IPC分类号： H02P6/10
CPC分类号： H02P6/10
摘要： A method for minimizing torque ripple in a permanent magnet brushless DC motor includes the steps of energizing a first winding of the motor to generate a first current, energizing a second winding of the motor to generate a second current, and overlapping the first and second currents in time by a preselected time to reduce torque ripple. The structure for performing the method includes conventional brushless DC motor drive circuitry responsive to a motor rotor position signal, and a speed control signal, to sequentially generate a gate drive signal for driving a respective semiconductor switch to energize each winding of the motor. The structure further includes a phase overlapping circuit interposed between the conventional brushless DC motor control circuitry output and the semiconductor switches used to energize each winding of the motor. The phase current overlap circuit includes a monostable multi-vibrator for generating a "one-shot." The pulse width or duration of the "one-shot" determines the extent of the phase current overlap. The overlapping circuit detects transitions on the gate drive signal lines, and in response generates a trigger signal. The trigger signal triggers generation of the "one-shot." The overlapping circuit maintains two of its gate drive signals for the duration of the "one-shot."
摘要翻译： 一种用于使永磁无刷直流电动机中的转矩波动最小化的方法包括以下步骤：激励电动机的第一绕组以产生第一电流，激励电动机的第二绕组以产生第二电流，并且与第一和第二电流重叠 通过预选的时间来减少扭矩波动。 用于执行该方法的结构包括响应于电动机转子位置信号的常规无刷直流电动机驱动电路和速度控制信号，以顺序地产生用于驱动相应半导体开关以激励电动机的每个绕组的栅极驱动信号。 该结构还包括插入在常规无刷DC电动机控制电路输出端和用于激励电动机的每个绕组的半导体开关之间的相位重叠电路。 相电流重叠电路包括用于产生“单次”的单稳态多谐振荡器。 “单次”的脉冲宽度或持续时间决定了相电流重叠的程度。 重叠电路检测栅极驱动信号线上的转变，并且响应产生触发信号。 触发信号触发“单次”的生成。 重叠电路在“一次”的持续时间内保持两个门驱动信号。
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公开(公告)号：US20110194317A1
公开(公告)日：2011-08-11
申请号：US13059872
申请日：2009-08-20
IPC分类号： H02M3/335
CPC分类号： H02M3/33569
摘要： A voltage converter includes a transformer with a pair of primary coils and a secondary coil. The converter has a DC input and a capacitor bank, having a pair of capacitors, is connected across the DC input. A switch is associated with each primary coil. A gate drive feedback module outputs a pulse width modulated signal to drive either the first or second primary coil. A gate drive switch has as an input the pulse width modulated signal and outputs to the first second switch. A pulse steering logic module determines which of the first or second capacitors has a higher voltage and controls the gate drive switch to direct the pulse width modulated signal in response thereto.
摘要翻译： 电压转换器包括具有一对初级线圈和次级线圈的变压器。 该转换器具有一个直流输入和一个电容器组，具有一对电容器，跨过直流输入端连接。 开关与每个初级线圈相关联。 门驱动反馈模块输出脉宽调制信号来驱动第一或第二初级线圈。 门驱动开关具有作为输入的脉宽调制信号并输出到第一第二开关。 脉冲转向逻辑模块确定第一或第二电容器中的哪一个具有较高的电压，并且控制栅极驱动开关以响应于此而引导脉宽调制信号。
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公开(公告)号：US4998526A
公开(公告)日：1991-03-12
申请号：US533329
申请日：1990-06-05
申请人： Kalyan P. Gokhale
发明人： Kalyan P. Gokhale
CPC分类号： F02P3/0456 , F02P15/10 , F02P3/005 , F02P3/01 , F02P9/002
摘要： An ignition system for a spark ignited internal combustion engine. The system can apply alternating current to the electrodes of a spark plug to maintain an arc at the electrodes for the desired length of time. The amplitude of the arc current can be varied. The alternating current is developed by a DC to AC inverter that is comprised of a transformer that has a center tapped primary and a secondary that is connected to the spark plug. An arc is initiated at the spark plug by discharging a capacitor through one of the winding portions of the center-tapped primary. Alternatively, the energy stored in an inductor can be supplied to a primary winding portion to initiate an arc. The ignition system is powered by a controlled current source that receives input power from a source of direct voltage such as a battery on a motor vehicle.
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公开(公告)号：US4835467A
公开(公告)日：1989-05-30
申请号：US147978
申请日：1988-01-25
申请人： Kalyan P. Gokhale
发明人： Kalyan P. Gokhale
摘要： A magnetoresistive sensor monitors the passing of teeth on a rotating wheel and generates a DC biased speed signal. An amplifier compares this voltage with the capacitor voltage and charges or discharges the capacitor through a pair of parallel coupled, oppositely poled diodes to maintain the capacitor voltage equal to the DC biased speed signal. The voltage across the diode pair is supplied to a comparator switch to provide a pulse train having a frequency that is a measure of the rotational speed of the wheel.
摘要翻译： 磁阻传感器监测旋转轮上的齿的通过并产生DC偏置速度信号。 放大器将该电压与电容器电压进行比较，并通过一对并联耦合的相对极化的二极管对电容器进行充电或放电，以保持电容器电压等于直流偏置速度信号。 二极管对上的电压被提供给比较器开关以提供具有作为轮的转速的量度的频率的脉冲串。
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