电机与控制学报
電機與控製學報
전궤여공제학보
ECTRIC MACHINES AND CONTROL
2014年
7期
24-30
,共7页
永磁同步电机%矢量控制%初始位置估计%正弦电流注入%控制器设计
永磁同步電機%矢量控製%初始位置估計%正絃電流註入%控製器設計
영자동보전궤%시량공제%초시위치고계%정현전류주입%공제기설계
permanent magnet synchronous motors%vector control%initial position estimation%sinusoidal current injection%controller design
针对传统永磁同步电机转子初始位置静止型辨识方法的注入频率过高和电流不可控等问题，提出了一种基于正弦电流注入的估计方法。在电流闭环控制的基础上，当给定子注入正弦电流时，永磁同步电机的凸极效应与转子磁极方向的非线性磁路饱和特性使得电流环控制器输出电压中含有转子磁极位置信息与极性信息，可分别用于转子磁极的初次辨识角度估计和极性判断。该方法消除了定子电阻与电感的影响，降低了注入正弦电流的频率要求，且可控的定子电流有效防止因电流过大而损坏变频器或因电流过小而影响估计精度。内嵌式永磁同步电机Matlab仿真和永磁同步电梯曳引机实验均验证了该方法的可行性。
針對傳統永磁同步電機轉子初始位置靜止型辨識方法的註入頻率過高和電流不可控等問題，提齣瞭一種基于正絃電流註入的估計方法。在電流閉環控製的基礎上，噹給定子註入正絃電流時，永磁同步電機的凸極效應與轉子磁極方嚮的非線性磁路飽和特性使得電流環控製器輸齣電壓中含有轉子磁極位置信息與極性信息，可分彆用于轉子磁極的初次辨識角度估計和極性判斷。該方法消除瞭定子電阻與電感的影響，降低瞭註入正絃電流的頻率要求，且可控的定子電流有效防止因電流過大而損壞變頻器或因電流過小而影響估計精度。內嵌式永磁同步電機Matlab倣真和永磁同步電梯抴引機實驗均驗證瞭該方法的可行性。
침대전통영자동보전궤전자초시위치정지형변식방법적주입빈솔과고화전류불가공등문제，제출료일충기우정현전류주입적고계방법。재전류폐배공제적기출상，당급정자주입정현전류시，영자동보전궤적철겁효응여전자자겁방향적비선성자로포화특성사득전류배공제기수출전압중함유전자자겁위치신식여겁성신식，가분별용우전자자겁적초차변식각도고계화겁성판단。해방법소제료정자전조여전감적영향，강저료주입정현전류적빈솔요구，차가공적정자전류유효방지인전류과대이손배변빈기혹인전류과소이영향고계정도。내감식영자동보전궤Matlab방진화영자동보전제예인궤실험균험증료해방법적가행성。
On account of the problems of traditional methods for initial rotor position identification in per-manent magnet synchronous motors ( PMSMs) at standstill, such as high injection frequency and uncon-trollable current, an estimation strategy based on sinusoidal current injection was proposed. As stator cur-rent is closed-loop controlled, when a sinusoidal current is injected into stator, the output voltage of cur-rent controllers contains rotor position and polarity information, which are used for primary rotor angle es-timation and magnetization polarity direction of initial rotor position. The impact of stator resistance and inductance was eliminated, and the injected current frequency limitation was reduced by the proposed strategy. Additionally, well-controlled stator current effectively prevented inverter damaging from too large current and avoided low estimation accuracy caused by too small current. Both Matlab simulation on inte-rior PMSM and experiment on surface-mounted permanent magnet synchronous elevator traction machine verified the strategy' s efficiency.
