MOOG伺服閥與MOOG變頻閥的區(qū)別
兩者的共同點：溝通伺服的技術(shù)自身就是學(xué)習(xí)并應(yīng)用了變頻的技術(shù)，在直流電機的伺服操控的基礎(chǔ)上經(jīng)過變頻的PWM方法仿照直流電機的操控方法來完結(jié)的，也就是說溝通伺服電機一定有變頻的這一環(huán)節(jié)：變頻就是將工頻的50、60HZ的溝通電先整流成直流電，然后經(jīng)過可操控門極的各類晶體管（IGBT，IGCT等）經(jīng)過載波頻率和PWM調(diào)度逆變?yōu)轭l率可調(diào)的波形類似于正余弦的脈動電，因為頻率可調(diào)，所以溝通電機的速度就可調(diào)了（n=60f/p ，n轉(zhuǎn)速，f頻率， p極對數(shù)）簡略的變頻器只能調(diào)度溝通電機的速度，這時能夠開環(huán)也能夠閉環(huán)要視操控方法和變頻器而定，這就是傳統(tǒng)意義上的V/F操控方法。許多的變頻現(xiàn)已經(jīng)過數(shù)學(xué)模型的建立，將溝通電機的定子磁場UVW3相轉(zhuǎn)化為能夠操控電機轉(zhuǎn)速和轉(zhuǎn)矩的兩個電流的重量，大多數(shù)能進行力矩操控的品牌的變頻器都是選用這么方法操控力矩，UVW每相的輸出要加霍爾效應(yīng)的電流檢查設(shè)備，采樣反響后構(gòu)成閉環(huán)負(fù)反響的電流環(huán)的PID調(diào)度；ABB的變頻又提出和這么方法不一樣的直接轉(zhuǎn)矩操控技術(shù)，詳細(xì)請查閱有關(guān)材料。這么能夠既操控電機的速度也可操控電機的力矩，并且速度的操控精度優(yōu)于v/f操控，編碼器反響也可加可不加，加的時分操控精度和照顧特性要好許多。
驅(qū)動器方面：伺服驅(qū)動器在展開了變頻技術(shù)的前提下，在驅(qū)動器內(nèi)部的電流環(huán)，速度環(huán)和方位環(huán)（變頻器沒有該環(huán)）都進行了比通常變頻更準(zhǔn)確的操控技術(shù)和算法運算，在功用上也比傳統(tǒng)的伺服強健許多，首要的一點能夠進行準(zhǔn)確的方位操控。經(jīng)過上位操控器發(fā)送的脈沖序列來操控速度和方位（當(dāng)然也有些伺服閥內(nèi)部集成了操控單元或經(jīng)過總線通訊的方法直接將方位和速度等參數(shù)設(shè)定在驅(qū)動器里），驅(qū)動器內(nèi)部的算法和更快更準(zhǔn)確的核算以及功用更優(yōu)良的電子器件使之更*于變頻器。
電機方面：伺服電機的材料、構(gòu)造和加工技術(shù)要遠(yuǎn)遠(yuǎn)高于變頻器驅(qū)動的溝通電機（通常溝通電機或恒力矩、恒功率等各類變頻電機），也就是說當(dāng)驅(qū)動器輸出電流、電壓、頻率改動很快的電源時，伺服電機就能根據(jù)電源改動發(fā)生照顧的動作改動，照顧特性和抗過載才華遠(yuǎn)遠(yuǎn)高于變頻器驅(qū)動的溝通電機，電機方面的嚴(yán)峻差異也是兩者功用不一樣的根柢。就是說不是變頻器輸出不了改動那么快的電源信號，而是電機自身就反響不了，所以在變頻的內(nèi)部算法設(shè)守時為了保護電機做了相應(yīng)的過載設(shè)定。當(dāng)然即便不設(shè)定變頻器的輸出才華仍是有限的，有些功用優(yōu)良的變頻器就能夠直接驅(qū)動伺服電機。
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Both have in common is that of the ac servo technology itself is the reference and application of frequency conversion technology, on the basis of the dc motor servo control imitation of dc motor by PWM variable frequency control mode, that is to say, there must be ac servo motor frequency conversion of this link: frequency conversion power frequency is 50, 60 hz ac rectifier to dc first, and then through a control gate of the transistor (IGBT, IGCT, etc.) through the carrier frequency and PWM control inverter for adjustable frequency waveform is similar to the cosine of pulse power, because the frequency is adjustable, so the speed of ac motor is adjustable (n = 60 f/p, n speed, frequency, f p a logarithmic)Simple inverter can adjust the speed of ac motor, then can be open loop or closed loop depends on control mode and frequency converter, which is in the traditional sense of the V/F control mode.Many frequency conversion has been through the establishment of mathematical model of ac motor stator magnetic field UVW3 phase into can control the motor speed and torque of the two current component, most of the famous brand can control the torque converter is controlled by such way moment, UVW output of each phase with hall effect current detection device, after sampling feedback constitute a closed-loop feedback current loop PID regulation;ABB variable frequency is put forward and the way of such different direct torque control technology, specific please refer to the relevant data.This can not only control the motor speed also can control the motor torque, speed and control precision is better than that of v/f control, encoder feedback can also add don't add, add better control precision and response characteristics.Drive: servo driver in the development of the premise of frequency conversion technology, inside the drive current loop, velocity loop and position loop (inverter without the ring) have been more accurate than general frequency conversion control technology and algorithm of computing, powerful in function than the traditional servo many, the main point can be accuray position control.Through the upper controller sends a pulse sequence to control the speed and position (of course also some internal integration servo control unit directly or through the bus communication way to set the parameters such as position and speed) in the drive, drive internal algorithm and a faster and more accurate calculation and performance more superior electronics is superior in frequency converter.Aspects: motor servo motor material, structure and processing technology is far higher than the frequency inverter ac motor driven (general ac motor or constant torque and constant power and other kinds of variable frequency motor), that is to say, when the driver output current, voltage, the power of the frequency change quickly, the servo motor can vary according to the action of the power supply change response, response characteristic and the overload capacity is much higher than ac frequency converter drive motor, the motor of the serious differences and they have different performance.That is not the power of the inverter output is not changed so fast signal, but the machine itself can't reaction, when the internal algorithm of frequency conversion is set so did corresponding overload set in order to protect the motor., of course, even if you don't set the output of the converter capacity is limited, some of the excellent performance of frequency converter can be direct drive servo motor.