基于改進(jìn)型滑模觀測器的無刷直流電機(jī)無位置傳感器控制
發(fā)布時(shí)間:2019-04-08 09:08
【摘要】:為實(shí)現(xiàn)無刷直流電機(jī)(brushless DC motor,BLDCM)無位置傳感器控制,該文提出一種改進(jìn)型的線反電勢滑模觀測器,為減少系統(tǒng)的抖振,該觀測器引入了一種光滑的雙曲正切函數(shù),使得控制系統(tǒng)不必外加低通濾波器和相位補(bǔ)償模塊就可以獲得平滑的線反電動(dòng)勢估計(jì)值,進(jìn)而避免了反電勢估計(jì)值的相位滯后。文中將估計(jì)得到的線反電勢信號(hào)對(duì)應(yīng)為3個(gè)虛擬霍爾信號(hào),直接獲得6個(gè)離散的換相信號(hào),從而無需固定相移電路和相移角的計(jì)算。仿真和實(shí)驗(yàn)表明,該文所提出的方法能夠準(zhǔn)確估計(jì)BLDCM的線反電動(dòng)勢,實(shí)現(xiàn)了BLDCM無位置傳感器控制。
[Abstract]:In order to realize sensorless control of brushless DC motor (brushless DC motor,BLDCM), an improved linear back EMF sliding mode observer is proposed in this paper. In order to reduce the chattering of the system, a smooth hyperbolic tangent function is introduced. So that the control system can obtain smooth linear anti-EMF estimation without adding low-pass filter and phase compensation module, thus avoiding the phase lag of the back-EMF estimation. In this paper, the estimated linear back-EMF signal is corresponding to three virtual Hall signals, and six discrete commutation signals are obtained directly. Therefore, the calculation of fixed phase-shift circuit and phase-shift angle is not required. Simulation and experiments show that the proposed method can accurately estimate the linear anti-EMF of BLDCM and realize the sensorless control of BLDCM.
【作者單位】: 天津大學(xué)電氣與自動(dòng)化工程學(xué)院;
【基金】:國家重點(diǎn)基礎(chǔ)研究發(fā)展計(jì)劃項(xiàng)目(973項(xiàng)目)(2013CB035600)~~
【分類號(hào)】:TM33
[Abstract]:In order to realize sensorless control of brushless DC motor (brushless DC motor,BLDCM), an improved linear back EMF sliding mode observer is proposed in this paper. In order to reduce the chattering of the system, a smooth hyperbolic tangent function is introduced. So that the control system can obtain smooth linear anti-EMF estimation without adding low-pass filter and phase compensation module, thus avoiding the phase lag of the back-EMF estimation. In this paper, the estimated linear back-EMF signal is corresponding to three virtual Hall signals, and six discrete commutation signals are obtained directly. Therefore, the calculation of fixed phase-shift circuit and phase-shift angle is not required. Simulation and experiments show that the proposed method can accurately estimate the linear anti-EMF of BLDCM and realize the sensorless control of BLDCM.
【作者單位】: 天津大學(xué)電氣與自動(dòng)化工程學(xué)院;
【基金】:國家重點(diǎn)基礎(chǔ)研究發(fā)展計(jì)劃項(xiàng)目(973項(xiàng)目)(2013CB035600)~~
【分類號(hào)】:TM33
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