主电路开关频率恒定，容易实现。
The main circuit switching frequency is constant, which is desirable for industrial applications.
主电路以反并联的晶闸管作为控制开关，控制焊接用的电阻点焊变压器通电与否。
In the main circuit, the inverse parallel couple SCRs (silicon-controlled rectifier) are used as a electric switch, switching the transformer of resistance spot welding.
研制的谐振式软开关弧焊逆变电源，主电路采用新型LCL结构，控制系统选用恒频移相调脉宽控制方案。
The resonant soft switching inverter arc welding power source uses LCL type structure in the main circuit, and selects phase shifting pulse wide modulation technique in the control system.
分析了一种带交流谐振环节软开关谐波补偿器的主电路拓扑。
A topology of the main circuit for the harmonic compensator with a resonant AC link soft-switching is analyzed.
主电路采用双管双正激拓扑结构，采用了逐脉冲电流比较控制技术和软开关技术。
The main circuit USES the double barrel pair to stir up the topology, and USES the pulse electric current comparison control technology and soft switch technology.
其主电路采用全桥式拓扑结构，以IGBT管为功率开关器件，中频变压器使用微晶磁心。
Full bridge topology was used in the main circuit, IGBT was used as power switching device, and micro-crystal core was used in mid-frequency transformer.
主放大器采用开关电容共模反馈电路在获得大输出摆幅的同时降低了功耗。
Used the switched capacitor Common Mode Feedback circuit(CMFB) in main amplifier to achieve a large output voltage swing and decrease the static power consumption at the same time.
同时，在主电路结构中，采用LCL滤波，改善了对高频开关谐波的抑制。
Meanwhile, in the main circuit structure, the use of LCL filter, improved high frequency switching harmonics suppression.
和磁开关不同，该变流器在主反馈输出上没有最小输出负载的要求，从而电路可以达到更高的效率。
Without the minimum output power requirement in the main output just as magnetic amplifier, higher efficiency can be achieved in this circuit.
利用有源钳位电路实现主变压器铁心对称复位，功率开关在宽输入电压和宽负载电流范围内零电压开关。
By using an active clamp circuit, the power transformer core is symmetrically reset. Zero voltage switching conditions are achieved over a broad input voltage and output current range.
第三章详细介绍了软起动控制器的硬件设计，包括主电路、控制电路、驱动保护回路和辅助开关电源电路的分析和设计。
The third chapter mainly introduces the hardware design of soft starter, including the main circuit, control circuit, drive circuit, and protect circuit and auxiliary switched power design.
在介绍了补偿器的无功补偿原理及电路主拓扑图的基础上，主要研究电容器的投切开关以及装置的投切判据。
It introduces compensation theory and main circuit, and that the mainly study are switches of capacitor and criterions of the device.
对于开关补偿电源的主电路部分，特别是变压器设计、PWM控制芯片选择、以及工作原理进行了详细的阐述。
As for the main part of switching power, in particular, more detail in the transformer design, PWM controller selection, and working theory.
该变频调速系统主电路采用交-直-交形式，以(CPLD)作为调速系统逆变电路功率开关器件(IPM)的逻辑控制器件。
The AC-DCAC voltage source inverter composes the main circuit of this variable frequency system and CPLD is the logic control device of the power device (IPM).
介绍了利用高频开关管IGBT构成模块化充电电源的主电路、控制电路及保护电路的结构、原理。
The structure and theory of main circuit, control circuit and protection circuit of modularized charge power supply composed by IGBT high frequency switch tubes are introduced in this paper.
由于采用了一种新型的低损耗无源缓冲电路，开关管和主二极管的电流电压应力较小，并降低了能量损耗，提高了工作效率。
Since the novel low-loss passive snubber circuit is used, the low current and voltage stress, low energy loss and high efficiency properties are achieved.
对移相全桥软开关电源主电路和控制电路进行了详细的参数设计。
Have carried on the detailed parameter design to the phase-shifted Full-Bridge soft switching power supply main circuit and the control circuit.
本文介绍了一种煤矿掘进工作面用智能型组合开关，由主电路和控制电路组成。
This paper presents an intelligent Multi-Function Switch used in dig working face of coal mine, which be constituted by the main electric circuit and the control electric circuit.
变频调速系统主电路采用交-直-交形式，以可编程逻辑器件(CPLD)作为调速系统逆变电路功率开关器件IGBT的逻辑控制器件。
Alternating-direct-alternating circuit is adopted and CPLD is used as logic control device of power IGBT in main circuit of variance-frequency timing system.
主电路采用具有无源辅助谐振网络的双管正激变换器，与普通双管正激变换器相比，功率管开关状态得到较好的改善，同时并没有增加电路的复杂性。
This paper introduces the circuit topology of portable inverter arc welder with soft snubber, mainly power circuit is a double switch forward converter with assistant resonant circuit.
研究采用正负斜率交替的锯齿载波，成功地解决了主电路在任何电压矢量下都能实现零电压开关动作；
The saw-tooth carrier waves with positive or negative slope alternately are studied and applied into the three-phase PWM inverter soft-switching operation.
以地铁车辆用DC750V牵引变频器为例，采用IGBT作为主要开关元件设计了逆变器主电路及控制系统，并利用MATLAB/SIMULINK进行了仿真。
It is designed that the main circuit and control system using the IGBT as its switch element based on the DC750V traction transducer of metro vehicles. The system is also simulated by MATLAB/SIMULINK.
电力变换器主电路部（3），其根据该脉冲宽度调制波对开关元件进行驱动，将直流电压转换为三相交流电压；
A power converter circuit (3) drives a switching device by the pulse-width modulated wave for converting a direct current into the three phase alternating current.
提出一种新颖的零电压开关（ZVS）双PWM变频主电路拓扑结构，具有结构最简单的优点；
A novel Zero Voltage Switching(ZVS)double PWM inverter topology circuit is proposed which contains such advantage as the most simple structure.
本文介绍了一种新型的脉冲氙灯预燃电源，它利用三端开关电源模块构成其主电路。
This paper introduces a new power supply of preignition for pulse xenon lamp.
可为电路控制开关、主令控制开关及电焊机开关等。
It can be used as circuit control switch, master control switch, and switch for welding machine and etc.
从主电路的拓扑结构和控制方式，分析了开关电源、PF C电路、软开关pwm电路的工作原理。
From the main circuit topology and control, analysis of the switching power supply, PFC circuit, soft-switching PWM circuit works.
选择了反激式开关电源作为高压电源的主电路，并以555脉冲控制电路和反激式驱动电路作为辅助电路。
The flyback mode switch power supply is chosen as the main circuit of the high voltage power in the paper with 555 pulse control circuit and flyback drive circuit.
给出了主开关管和同步整流管实现ZVS的具体条件和参数设计，同时对变换器的主电路进行了设计。
The parameters and the condition of realizing ZVS of the main switches and rectifiers, the parameters of the main circuits are given.
给出了主开关管和同步整流管实现ZVS的具体条件和参数设计，同时对变换器的主电路进行了设计。
The parameters and the condition of realizing ZVS of the main switches and rectifiers, the parameters of the main circuits are given.
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