The PWM chopper circuit and the selection of power switching elements, protecting circuits, driving units and software programming are given out.
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。
High frequency switching power supply made from it can not only simplify the circuit, but also can improve the EMC characteristics and reduce the cost.
采用它制作高频开关电源，不仅简化了电路，同时可以改善电源的电磁兼容性能，且降低了制作成本。
Snubber circuit of switching power supply.
开关电源的缓冲电路。
Novel circuit structure and topologies family of uninterruptible AC switching power supplies with high power factor are proposed.
提出了一类新颖的不间断高功率因数交流开关电源电路结构与拓扑族。
Theoretical analysis shows that the CUK circuit has inherently the features of power factor correction and soft turn off switching.
理论分析得出了CUK电路具有固有的功率因数校正和软关断开关特性。
In this paper, by the use of dual-current control mode and intelligent UC3842 chip as the core, a single-chip switching power supply circuit are presented.
本文使用双电流控制模式，以智能芯片uc 3842为核心，设计了单片开关电源的实用电路。
The main circuit consists of the switching power supply, the main control circuit, and the power circuit.
本课题硬件结构主要包括开关电源，主控电路、功率电路三部分。
In this paper, using unity power factor PWM rectifier and chopper circuit, it establishes a new type of switching power supply about PWM input rectifier circuit.
文章采用单位功率因数pwm整流器和斩波电路组成开关电源主体，建立以pwm整流电路为输入电路的新型开关电源。
The present invention discloses a power system, including a switching circuit, a resonant tank, a feedback circuit, and controller circuitry.
本发明公开了一种电源系统，包括开关电路、谐振回路、反馈电路和控制电路。
Each of the converter circuit branches may contain a power switching transistor, a diode or a winding of an isolated transformer in addition to general circuit components.
这种电路的每一支路中的元件，除一般电路元件外，还可能包括功率开关晶体管、二极管或隔离变压器的一个绕组。
A switching circuit, method and control unit (1) for controlling electric power supply for lighting fixtures.
一种用于控制用于照明设备的电源的开关电路，方法和控制单元(1)。
The transition function of soft switching inverter arc power is developed. The control circuit of outer character of the power is designed as well. And an ideal outer character is obtained.
建立了软开关逆变弧焊电源的传递函数，设计了电源外特性控制电路，得到了较理想的电源外特性。
The circuit principle and features of the typical half - bridge switching power source, the reasonable overhauling methods and steps and the key test data waveshapes in computer are discussed.
研究了微机中具有代表性的半桥脉宽式开关电源的电路原理和特点，提出了简捷、合理的检修方法和步骤，以及关键测试点的经验数据和波形图。
A new feedback circuit, which is designed based on PWM controller UC3842 of flyback switching mode power supply is presented.
介绍了一种基于PWM控制芯片uc 3842的反激式开关电源的反馈控制回路改进设计。
Novel circuit structure and topologies of single-stage DC switching power supplies with uninterruptible power supply and high power factor, based on flyback converter, are proposed.
该文提出了一类基于反激变换器的单级不间断高功率因数直流开关电源电路结构与拓扑族。
In order to make DC DC power converted, voltage resonant switch is combined by resonant circuit and switching PWM.
采用谐振电路和PWM开关结合，组成电压谐振开关，实现DC—D C功率变换。
La Circuit Design class-H, power supply with synchronous rectification switching power supply, light weight, small size, especially suitable for mobile performance of anti-sound applications.
LA系列采用高效H类电路，电源采用同步整流的开关电源，重量轻、体积小，特别适合流动演出扩声应用。
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.
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。
Receiving the third signal and based on a reference voltage, the switching circuit controls the pulse wave width of the switching signal so as to adjust output current of the power converter.
切换电路接收第三讯号并依据一参考电压，以控制切换讯号的脉波宽度，所以可调整功率转换器的输出电流。
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.
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。
A novel ZVT power factor correction circuit is proposed, in which the saturable core and the-capacitor are added to the auxiliary switching network.
提出一种新型ZVT功率因数校正电路，将饱和电感和并联电客加入辅助开关网络中。
A new drive circuit for IGBT is designed. It features high switching frequency, high driving power, simple-structure and reverse-turn-off.
论文中还设计了一种新型的IGBT驱动电路，它具有开关频率高、驱动功率大、结构简单且具有负压关断的特点。
Most switches have a standby power circuit, switching power supply in standby mode still oscillating, but the frequency of normal working hours than lower.
大多数开关电源有待机电路，在待机状态开关电源还在振荡，只是频率比正常工作时要低。
In the differential input, positive feedback circuit was used to increase the switching speed and attain low power.
在差分输入端，采用正反馈电路结构，以提高开启和关断速度，并降低功耗。
The internal circuit is made of high-power relay switching which avoiding the phenomena often burned.
内电路全部采用大功率继电器转换，避免了经常烧毁开关现象。
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.
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。
For the use of off-line switching mode power supply IC, an internal power supply circuit combining with a high voltage startup current source is proposed.
结合高压启动恒流源设计了一种用于离线式开关电源的内部电源电路。
Have carried on the detailed parameter design to the phase-shifted Full-Bridge soft switching power supply main circuit and the control circuit.
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。
This paper introduces the principle of active power factor correction (APFC), circuit-topology, control strategy and soft-switching technology, and predicts the tendency of APFC.
综述了APFC技术的基本原理，拓朴电路，控制策略及软开关技术，并预测了其发展趋势。
This paper introduces the principle of active power factor correction (APFC), circuit-topology, control strategy and soft-switching technology, and predicts the tendency of APFC.
综述了APFC技术的基本原理，拓朴电路，控制策略及软开关技术，并预测了其发展趋势。
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