直流電機(jī)速度控制中英文翻譯‘(已改無(wú)錯(cuò)字)
2022-12-13 23:20:37 本頁(yè)面
【正文】 age vector control PWM (SVPWM) also calls the magic flux sine PWM law .It take the threephase profile whole production effect as the premise, take approaches the electrical machinery air gap the ideal circular rotary field path as the goal, has the actual magic flux with the inventor different switch pattern to approach the base director circle magic flux, by theirs parison result decided the inventor the switch, forms the PWM profile. This law embarks from the electric motor angle, regards as the inventor and the electrical machinery a whole, inscribes the polygon to approach the circle the way to carry on the control, causes the electrical machinery to obtain the peaktopeak value constant circular magic field (sine magic flux). The concrete method divides into the magic flux splitring type and the magic flux closed loop type. The magic flux splitring law synthesizes an equivalent voltage vector with a two nonvanishing vector sum null vector, if the sampling time enough is small, may synthesize the random voltage vector. When this law output ratiovoltage sinewave modulation enhances 15% close, sum of the harmonic current effective value smallest. The magic flux closed loop type introduces the magic flux feedback, controls the magic flux the size and the change speed .Estimates the magic flux after the parison and assigns the magic flux, according to the error decided has the next voltage vector, forms the PWM profile. This method has overe the magic flux splitring method insufficiency, when has solved the electrical machinery low speed, the stator resistance affects the major problem, reduced the electrical machinery pulsation and the noise. But because has not introduced the torque the adjustment, the system performance has not had the fundamental improvement. 直流電機(jī)速度控制 調(diào)節(jié)系統(tǒng) 調(diào)節(jié)系統(tǒng)是一類(lèi)通常能提供穩(wěn)定輸出功率的系統(tǒng)。 例如，電機(jī)速度調(diào)節(jié)器要能在負(fù)載轉(zhuǎn)矩變化時(shí)仍能保持電機(jī)速度為恒定值。即使負(fù)載轉(zhuǎn)矩為零，電機(jī)也必須提供 足夠的轉(zhuǎn)矩來(lái)克服軸承的粘滯摩擦影響。其它類(lèi)型的調(diào)節(jié)器也提供輸出功率，溫度調(diào)節(jié)器必須保持爐內(nèi)的溫度恒定，也就是說(shuō)，即使?fàn)t內(nèi)的熱量散失也必須保持爐溫不變。一個(gè)電壓調(diào)節(jié)器必須也保持負(fù)載電流值變化時(shí)輸出電壓恒定。對(duì)于任何一個(gè)提供一個(gè)輸出，例如速度、溫度、電壓等
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