變頻器工作原理外文文獻(xiàn)翻譯、中英文翻譯

1、外文資料Converter working principleMain circuit is for induction motors provide voltage variable frequency power source power conversion part, the inverter main circuit in general can be divided into two categories 1: voltage is voltage source DC converter for AC inverter, the DC loop filter is capacita

2、nce. Current model is the current source of the direct streamization AC inverter, the DC circuit filter inductance. It consists of three parts, the power supply conversion for DC power rectifier, absorption produced in converter and inverter voltage ripple flat wave circuit, and DC power converter f

3、or AC power inverter .(1) rectifier: Recently a lot of use is diode converter, it is the power supply conversion for the DC power supply. Also available two groups of transistor converters constitute a reversible converter, due to its power direction reversible can regeneration operation.(2) the fla

4、t wave circuit: in the rectifier DC voltage, containing 6 times the frequency of power supply ripple voltage, furthermore the inverter produces a pulsating current the DC voltage changes. In order to suppress the voltage fluctuation, the inductance and capacitance absorption pulsating voltage (curre

5、nt). Device volume hours, if power supply and a main circuit component in margin can save inductance of the simple flat wave circuit.(3) inverter: Contrary to rectifier, inverter is the DC power conversion is the desired frequency AC power and to determine the time the six switch device turn-on and

6、off you can get 3 phase AC output. By voltage type PWM converter as exemplifying the switching time and voltage waveform.Control circuit is to provide a loop control signal to the asynchronous motor power supply (voltage, frequency) of the main circuit, the frequency, the voltage operation circuit,

7、the main circuit of the voltage and current detection circuit, the motor speed detection circuit, operation circuit of control signal amplification drive circuit , and the inverter and the motor protection circuit.(1) arithmetic circuit: the external speed, torque and other instructions with the det

8、ection circuit of the current, voltage signal comparison operation, determine the output voltage of the inverter, frequency.(2) voltage, current detection circuit: with the main circuit potential isolation detection voltage, current and so on.(3) driving circuit, driving circuit of main circuit devi

9、ces. It and control isolation circuit enable device in the main circuit turn-on, turn off. (4) speed detection circuit installed in asynchronous motor shaft machine speed detector (TG, PLG) signal for speed signal into the computing circuit, according to the instruction and operation can make the mo

10、tor run in the speed command.(5) protection circuit: detection of the main circuit of the voltage, current and so on, when the occurrence of overload or over voltage, etc., in order to prevent the inverter and asynchronous motor damage, so that the inverter to stop working or inhibit voltage, curren

11、t value.中文翻譯變頻器工作原理主電路是給異步電動(dòng)機(jī)提供調(diào)壓調(diào)頻電源的電力變換部分，變頻器的主電路大體上可分為兩類1:電壓型是將電壓源的直流變換為交流的變頻器，直流回路的濾波是電容。電流型是將電流源的直流變換為交流的變頻器，其直流回路濾波是電感。 它由三部分構(gòu)成，將工頻電源變換為直流功率的“整流器”，吸收在變流器和逆變器產(chǎn)生的電壓脈動(dòng)的“平波回路”，以及將直流功率變換為交流功率的“逆變器”。 （1）整流器：最近大量使用的是二極管的變流器，它把工頻電源變換為直流電源。也可用兩組晶體管變流器構(gòu)成可逆變流器，由于其功率方向可逆，可以進(jìn)行再生運(yùn)轉(zhuǎn)。 （2）平波回路：在整流器整流后的直流電壓中，含

12、有電源6倍頻率的脈動(dòng)電壓，此外逆變器產(chǎn)生的脈動(dòng)電流也使直流電壓變動(dòng)。為了抑制電壓波動(dòng)，采用電感和電容吸收脈動(dòng)電壓（電流）。裝置容量小時(shí)，如果電源和主電路構(gòu)成器件有余量，可以省去電感采用簡(jiǎn)單的平波回路。 （3）逆變器：同整流器相反，逆變器是將直流功率變換為所要求頻率的交流功率，以所確定的時(shí)間使6個(gè)開(kāi)關(guān)器件導(dǎo)通、關(guān)斷就可以得到3相交流輸出。以電壓型pwm逆變器為例示出開(kāi)關(guān)時(shí)間和電壓波形。 控制電路是給異步電動(dòng)機(jī)供電（電壓、頻率可調(diào)）的主電路提供控制信號(hào)的回路，它有頻率、電壓的“運(yùn)算電路”，主電路的“電壓、電流檢測(cè)電路”，電動(dòng)機(jī)的“速度檢測(cè)電路”，將運(yùn)算電路的控制信號(hào)進(jìn)行放大的“驅(qū)動(dòng)電路”，以及逆變器和電動(dòng)機(jī)的“保護(hù)電路”組成。 （1）運(yùn)算電路：將外部的速度、轉(zhuǎn)矩等指令同檢測(cè)電路的電流、電壓信號(hào)進(jìn)行比較運(yùn)算，決定逆變器的輸出電壓、頻率。 （2）電壓、電流檢測(cè)電路：與主回路電位