所有的这些电路都不需要外部的功率开关。
None of the circuits requires the use of external power switches.
同时采用软启动电路防止浪涌电流，保护功率开关管。
To protect power switches, soft-starting circuit was designed to overcome the surge current.
采用先进的逆变技术和进口MOSFET功率开关器件。
Apply advanced reversing technology and imported MOSFET power switch.
电源还设置了软起动及过流保护电路，以防逆变功率开关管的损坏。
The source is put up the circuits with the soft start and overcurrent protection to prevent the switching-transistor from breakdowning.
电力电子线路的核心多为大功率开关器件，其稳定安全运行至关重要。
The core of electric power circuit probably is big power switch unit, and it's most important that it runs stably and safely.
该装置的电路由脉冲形成源、压频变换器和光耦与功率开关三部分组成。
The circuit of this device is formed the source, pressed frequently by the pulse changer, photosensitive resister and power switch three parts make up.
该电路拓扑族包括单四象限功率开关式、推挽式、半桥式、全桥式等四种电路。
The circuit topologies family include single four-quadrant power switch mode, push-pull mode, half-bridge mode, and full-bridge mode circuits.
该电路拓扑族包括单四象限功率开关式、推挽式、半桥式、全桥式等四种电路。
The circuit topologic family includes circuits of single four-quadrant power switch mode, push-pull mode, half-bridge mode. and full-bridge mode.
与其他种类的功率开关器件相比，具有开关速度快，易于实现栅控关断等优点。
Compared with other power device, it has many merits, such as high switch speed, convenient to turn-off by control of gate bias.
选用IGBT作为功率开关器件，自主设计了一套驱动电路对IGBT进行驱动；
Select IGBT for power switch device, design one urge circuit for IGBT independently;
该仪器由可编程脉冲发生器、高压可调稳压电源、高压功率开关和保护电路组成。
It mainly consists of a programmable pulse generator, adjustable high voltage regulator, high voltage switch and protection circuits.
该变流器采用MCS - 8098单片机作为控制器，GTO作为功率开关器件。
MCS 8098 single chip microcomputer and GTOs are adopted as processor and power switching devices.
软开关技术能够有效改善功率开关管的工作环境，降低开关损耗，提高变换器的效率。
Soft switching technique could improve the circumstance of the power switch, reduce the losses and increase the efficiency of the converter.
开关电源的高频化使得功率开关的损耗加大，采用软开关技术是减小该损耗的有效手段。
As the working frequency of the switches in SMPS (switch Mode Power Supply) increases, the switching loss increases, too. Soft switch technique can overcome this problem.
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.
该拓扑具有所有功率开关均为软开关，输出二极管电压应力低和输入输出滤波器小的特点。
There are soft switching conditions of all switches, low voltage stresses on the output diodes, and smaller input and output filters in this topology.
介绍一种带变压隔离器、含多个功率开关器件的PWM变换器工作在连续状态的建模方法。
A new method is introduced for modeling PWM DC-DC converter with multi-switches and transformers, which operate in continuous conduction mode, including parasitic components.
主要内容包括PWM斩波电路结构及功率开关器件的选择，驱动电路，保护电路以及软件编程。
The PWM chopper circuit and the selection of power switching elements, protecting circuits, driving units and software programming are given out.
该逆变电路克服了传统逆变器的直通问题，功率开关管和功率二极管可以分别得到最优设计。
This topology overcomes the shootthrough problem in traditional inverter. The switch and diode can be designed separately.
然而，由于漏感影响，反激变换器功率开关管关断时将引起电压尖峰，必须用钳位电路加以抑制。
However, due to leakage effects flyback converter power switch off when the voltage spike caused by the need to be inhibited by clamping circuit.
针对逆变桥功率开关管短路、开路及霍尔传感器缺相等故障进行了仿真，得到了相应的特征波形。
The faults including short circuit, open circuit in power transistors and phasefault in Hall sensors are simulated and performance waveforms relevant to different faults are obtained.
在采用降压开关功率开关转换器降低正输入电压的同时，通常还需要一个额外的低功率负输出电压。
When we use low-dropout switching power switching converter to reduce positive input voltage, we usually need an extra low - power negative output voltage.
该焊机采用“无源引弧器”引弧，引入CMOS、时基、大功率开关等集成电路进行弧焊自动控制。
Welding machine control unit is equiped with no power source arc start unit, CMOS, and high power switch.
在异步电机运行中，经常会出现烧毁功率开关 器件的事故，而此原因多是因为电机启动失控造成的。
The trouble which the power switch is always fired occurs often in the process of motor running. It is because of the lose-control of the start.
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.
结果表明：采用智能功率开关的H桥电路具有工作可靠、控制策略简单、可靠，电路制造成本低等优点。
The results showed that the new H-bridge has more strong points in the aspects of reliability, convenience to control, low cost and so on.
尤其适合以igbt作为主功率开关管的高电压、大功率功率变换，具有广泛的应用前景和巨大的经济价值。
So this novel converter has a wide application and huge economy effect in power converting field, especially in the high voltage and high power feild where IGBT is used as the main switch.
尤其适合以igbt作为主功率开关管的高电压、大功率功率变换，具有广泛的应用前景和巨大的经济价值。
So this novel converter has a wide application and huge economy effect in power converting field, especially in the high voltage and high power feild where IGBT is used as the main switch.
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