magnetic switching system 中文意思是什麼
magnetic switching system
解釋
磁力開關系統-
There are five parts are as follows : in part one, the concept of switching function is introduced first to establish the nonlinear mathematical model of the induction motor variable frequency speed adjustment system which is fed by a sine pulse width modulated ( spwm ) inverter and takes the effect of the main magnetic circuit saturation into consideration, then the low frequency oscillation of the system is simulated according to the model. next, from the view point of energy conversion of the inverter - induction system, a criterion for the low frequency oscillation is proposed to determine whether the system is in low frequency oscillation which is judged by whether the interval of the negative current component of the inverter input current is more than 1 / fc ( fc is the carrier wave frequency of the inverter ) or not
首先引入開關函數概念，建立了正弦脈寬調制（ spwm ）逆變器供電異步電動機，考慮主磁路飽和時的變頻調速系統整體數學模型，模擬系統的低頻振蕩；其次從逆變器-異步電動機系統能量轉換角度出發，提出通過檢測逆變器輸入電流中負電流的間隔時間是否大於1 / f _ c （ f _ c為逆變器載波頻率）來判定系統是否出現低頻振蕩；最後的實驗結果驗證了系統低頻振蕩建模和判據的實用性和正確性。 -
This dissertation focuses on the integration technology in the magnetic bearing system including permanent magnet biased axial - radial magnetic bearing, bearingless induction motor, novel switching amplifier used in mb and robust control of mb
電磁軸承集成技術是目前磁軸承高速電機領域研究的熱點。該技術對于提高系統的可靠性、減小轉子軸向長度和體積，改善高速電機的動態性能具有獨特的作用。 -
Kc - 1 type of bistable magnetic protection switching also known as magnetic relay, the lift system into a true sensor
1 kc - 1型雙穩態磁保開關亦稱磁保持繼電器，系電梯 -
On the basis of the principle of direct torque control, a control strategy of the grade of errors for induction motor has been proposed to improve the performance of powertrain system of hybrid vehicle in this thesis. the stator flux error, electric magnetic torque error and flux position angle are considered as control variables, and the switching states are determined by the control rules of the direct torque control
本文在直接轉矩控制系統的基礎上提出了一種基於誤差等級的直接轉矩控制dtc策略，它以電機定子磁鏈誤差、電機電磁轉矩誤差及磁鏈位置角作為控制變量，然後根據直接轉矩控制原理制定控制規則來選擇開關狀態，進而提高系統瞬態時的轉矩響應。 -
In the design of real - time control system, the paper takes three - phase full - bridge mosfet inverter as the real - time control main circuit, and adopts a control scheme with 120 ? switching mode combined with half - bridge pulse width modulation ( pwm ), which would avoid straightthrough short of a certain bridge. phase current is detected by single current sensor ; three - phase position signals generated by position sensors could not only supply commutation information for inverter, but also be used for speed detecting based on signals " period measurement, which makes the speed sensor unnecessary. the whole control system adopts speed and current dual closed - loop control strategy in order to construct a high performance rare - earth permanent magnetic brushless dc motor ( repm bldcm ) full - digital real - time control system
在實時控制系統的設計中，本文以三相全橋mosfet逆變電路作為實時控制主電路，採用120導通方式結合半橋pwm調制的控制方案，從而有效地避免了橋臂的直通短路；本文用單電流傳感器實現對相電流的檢測，來自位置傳感器的三相位置信號不僅為逆變電路提供換相信息，而且也用於基於信號周期測量的轉速檢測，這樣就省去了速度傳感器；系統採用的是速度、電流雙閉環控制策略，力求構建高性能的稀土永磁無刷直流電動機全數字實時控制系統。 -
The standard current controlled bi - state pwm switching power amplifier has its intrinsic deficiencies, such as significant harmonic distortion and restriction of the dynamic characteristic, which have serious negative effects on the magnetic bearing system
傳統的磁軸承開關功放大都採用電流兩態調制技術，存在電流紋波大、動態特性受限等缺點。
分享友人