在常规的硬开关电路中，由于变压器漏感及寄生电容的影响，常常在开关转换瞬间会产生很高的电压尖峰。
In common hard switching circuit, high voltage spike usually could be produced during switch transition process because of the effect of transformer leakage inductance and parasitic capacitor.
抽头式电源，用转换开关改变初级线圈匝数来调节焊接电压，因此性能十分可靠，维修亦简便。
Plug-type power, user the transfer switch to change the initial step coils adjust The welding voltage. Thus the performance is reliable and maintenance id very simple.
介绍了一种新型的零电压转换软开关技术在大升压比PW M直-直变换器上的应用。
In this paper, a novel Zero voltage Transition soft switching techniques have been investigated for a PWM DC DC large boost conversion application.
开关电源是一种电压转换电路，主要的工作内容是升压和降压，广泛应用于现代电子产品。
Switching power supply Switching power supply is a voltage conversion circuit, the main work is the step-up and step-down, are widely used in modern electronic products.
主要用途：低电压整流，高频转换开关和极性保护。
Applications: Low Voltage, High Frequency Inverters, and Polarity Protection Applications.
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.
它可使原边所有的开关管零电压导通、副边的整流管零电流关断，因而可实现极高的转换效率。
In resonant converter all switches are working on the ZVS and the secondary diodes are working on the ZCS, so we can achieve high efficiency.
二是正弦波网络：主要包括正弦量化的电流源整列和开关网络，电流电压转换器，二阶低通滤波器；
The second part is to design the sine wave networks circuits which is composed of sinusoidal current source array and switches, current to voltage converter (I-V converter), two staged LPF, etc.
它由与输入控制电压同步的触发器控制四模拟开关阵列的开关转换来选择输出极性。
Its output polarity is determined by the four analog switch array controlled by an input-synchronized trigger.
柜内还装有电流表、电压表、自动空气开关、指示灯、交流接触器、工频变频转换开关及起动、停止按钮等。
Inside is arranged ammeter, voltmeter, air circuit breaker, indicator, ac contactor, conversion switch, and buttons for starting or stopping.
本发明提供了一种过压保护控制电路，包括：电压转换电路、电压比较电路和开关电路。
An overvoltage protection control circuit includes a voltage conversion circuit, a voltage comparison circuit, and a switching circuit.
开关量输出模块是将PLC内部低电压信号转换成驱动外部输出设备的开关信号，并实现PLC内外信号的电气隔离。
Output switch module is a low voltage PLC internal drive external signals into the switching signal output device and to achieve internal and external PLC electrical signal isolation.
它由与输入控制电压同步的触发器控制四模拟开关阵列的开关转换来选择输出极性。
Its output polarity is determined by the four analog switch array controlled by an input - synchronized trigger.
为提高逆变器的转换效率，提出一种新型零电压开关谐振直流环节逆变器。
A novel zero-voltage switching resonant DC link inverter was proposed to improve conversion efficiency of the inverter.
标准的双程序转换开关允许操作者设置不同的电压和送丝速度，并在两种程序间相互转换。
Standard dual procedure allows operator to set different voltage and wire feed speeds and switch between the two.
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.
结果表明，变换器有良好的零电压软开关特性和负载特性，较高的功率转换效率和较低的电磁辐射。
The results show that the converter have good ZVS and a special property of loading character, and it has a higher efficiency of power conversion and lower EMI.
电源的供电电压可使用转换开关选择110v和220v作为供电电压。
Power supply voltage selection switch can be used as a supply voltage 110v and 220v.
电源的供电电压可使用转换开关选择110v和220v作为供电电压。
Power supply voltage selection switch can be used as a supply voltage 110v and 220v.
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