motor switching system 中文意思是什麼
motor switching system
解釋
旋轉制交換系統-
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。 -
It is validated that the design of induction machine vvvf control system has its rationality and feasibility. the distinct reduction of switching loss shows the efficiency of the three optimal switching patterns initiated. the research of this paper lays a solid foundation for the research of the high - speed motor control system to be continued
空載和負載實驗表明文中所提出的感應電機調速方案的正確性和實用性，以及三種優化svpwm開關模式在減少開關損耗等方面的有效性，為后續的高速、超高速電機控制打下了理論和實驗基礎。 -
In order to solve the problem of direct torque control ( dtc ) for permanent magnet synchronous motor ( pmsm ) related to the flux and the torque ripple and the uncertainty of switching frequency, a method which shorten the voltage - vector - function - time by svm ( space vector modulation ) is developed, and in order to improve the system performance, the stator flux linkage sectors and vectors are subdivided
摘要為了解決永磁同步電機傳統直接轉矩控制低速時磁鏈和轉矩脈動大的問題，提出了1種用空間矢量調制（ svm ）實現減小電壓矢量在1個控制周期中的作用時間的直接轉矩控制方法;為進一步提高系統性能，對磁鏈扇區和電壓矢量進行了細分。 -
The inverters based on space - vector pwm technique have many good qualities, such as less pulsating torque, higher usage of dc bus voltage, less switching loss, better high - speed regulation performance, so it is applicable for the high - performance motor control system
電壓空間矢量pwm技術（ svpwm ）將逆變器和電動機視為一體，由之控制的變頻器具有輸出轉矩脈動量低、直流電壓利用率高、開關損耗小、高速調速性能好等優點，適用於高性能電機調速控制系統。 -
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。 -
To reduce the high starting current as asynchronous motors start up directly and eliminate the negative influence that brought about by switching of contact when it starts up with reduced - voltage means, two new methods based on power electronics technology for improving the starting characteristics of three - phase induction motor are presented. one is alternative voltage regulator, the other is alternative voltage chopper. the three - phase regulating circuit - asynchronous motors system and the three phase chopper circuit - asynchronous motors system are analyzed and simulated with matlab
為解決上述問題，本文提出一種基於斬波方式的三相交流異步電動機的軟起動新方法，論文對電路的起動特性、功率因數、諧波以及控制策略進行了研究，模擬結果表明這種基於斬波方式的三相交流異步電動機的軟起動方法比基於三相交流調壓的三相交流異步電動機的軟起動方法具優越性。 -
The dissertation takes the pmsm ( permanent magnet synchronous motor ) ac servo drive system as research object, according to the requirement of developing high performance pmsm ac servo drive system, and combing the new development of control theories and soft - switching technology. on the basis of analysis and research of theory, a full digital pmsm ac servo drive system based on soft - switching technology is developed, with the dsp ( tms320f2812 ) and cpld ( epf10k10lc84 - 15 ) as the central control unit
本文以極具發展前景的pmsm交流伺服驅動系統為研究對象，在綜合分析現代交流伺服系統發展趨勢和借鑒前人研究成果的基礎上，針對發展高性能pmsm交流伺服驅動系統的需要並結合控制理論和軟開關技術的新發展，在理論研究的基礎上，設計實現了一套完整的基於軟開關技術並應用dsp （ tms320f2812 ）和cpld （ epf10k10lc84 - 15 ）為控制核心的全數字化pmsm交流伺服驅動系統。 -
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。
分享友人