An Adaptive PI Controller Design for Current Control of Brushless DC Motor Drives

Öz

Brushless direct current motor(BLDCM) are used to drive many systems in numerous fields. The control of BLDCM with basic drive techniques is required to obtain the desired output. Although basic drive techniques may be unsatisfactory in meeting these demands, they have found an invariable place for themselves due to their easy-to-use advantages. Due to these reasons, many researchers have focused on how innovative solutions are developed. In this paper, an adaptive PI controller is proposed to control the current of BLDCM drives. This paper aims to design a PI controller with time-varying gains for current regulation. The adaptive PI, improving the steady-state response, is constructed by one adaptation rule and a classical PI. In addition, the stability analysis is proved with Lyapunov theory. To demonstrate the effectiveness of the proposed controller, several simulations are performed with comparisons. The simulations with a classical PI and high-gain current controller comparisons are presented for set-point and sinusoidal references, and 500 rpm and 1500 rpm motor speeds. Comparing the classical PI with adaptive controller, the adaptive controller improves the current performance from 0.3442 to 0.0656 for 500 rpm, and from 0.4703 to 0.1552 for 1500 rpm in RMS of the current errors for 2A reference current. Similarly, the outcomes of comparing the high-gain controller to the adaptive PI show that the designed controller reduces RMS of the currents errors from 0.1853 to 0.1611 for 1500 rpm with 2A reference current, and from 0.1879 to 0.1720 for 1500 rpm with a sinusoidal reference current.

Anahtar Kelimeler

• Brushless direct current motor drives
• Adaptive control
• PI controller
• Current control

Fırçasız Doğru Akım Motor Sürücülerinin Akım Kontrolü için Bir Uyarlamalı PI Kontrolcü Tasarımı

Öz

Fırçasız doğru akım motoru(FDAM), sayısız alanda birçok sistemi tahrik etmek için kullanılmaktadır. FDAM temel tahrik teknikleriyle kontrolü, istenilen performansın alınabilmesi için gereklidir. Her ne kadar klasik yaklaşımlar bu talepleri karşılamada yetersiz kalsa da klasik kontrolörler kolay sürüş avantajlarından dolayı kendilerine değişmez bir yer bulmuşlardır. Bu nedenlerden dolayı, birçok araştırmacı yenilikçi çözümlerin nasıl geliştireceği üzerine odaklanmıştır. Bu makalede, FDAM akım kontrolü için uyarlamalı bir PI kontrolcü önerilmektedir. Bu makaledeki amaç, FDAM akım regülasyonu için zamanla değişen kontrolör kazançlarına sahip bir PI kontrolcü tasarlamaktır. Sürekli rejim yanıtını iyileştiren önerilen uyarlamalı PI kontrolcü, bir uyarlama kuralı ve klasik bir PI kontrolcüden oluşmaktadır. Ayrıca, kararlılık analizi Lyapunov teorisi ile kanıtlanmıştır. Önerilen kontrolörün etkinliğini göstermek için karşılaştırmalarla çeşitli simülasyonlar gerçekleştirilmiştir. Klasik PI ve yüksek kazançlı akım kontrolörü ile yapılan benzetimler, sabit ve sinüzoidal referanslar ile 500 rpm ve 1500 rpm motor hızları için karşılaştırmalı olarak sunulmuştur. Klasik PI, uyarlamalı kontrolcü ile karşılaştırıldığında, uyarlamalı kontrol 2A referans akımı için akımlarının hatasının RMS'deki akım performansını 500 rpm hız için 0,3442'den 0,0656'ya ve 1500 rpm hız için 0,4703'ten 0,1552'ye iyileştirmektedir. Benzer şekilde, yüksek kazançlı kontrolcünün uyarlamalı PI ile karşılaştırma sonuçlarında, uyarlamalı kontrolcü, motor akımlarının hatasının RMS'sini 2A referans akımında 1500 rpm hız için 0,1853'ten 0,1611'e ve sinüzoidal referans akımında 1500 rpm hız için 0,1879'dan 0,1720'ye düşürmektedir.

Anahtar Kelimeler

• Fırçasız doğru akım motor sürücüsü
• Uyarlamalı kontrol
• PI kontrol
• Akım kontrol

Kaynakça

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