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This paper proposes H∞ control based on linear parameter varying(LPV) systems for load torque compensation of the permanent magnet synchronous motors(PMSMs). The proposed method consists of torque modulation, commutation scheme and LPV H∞ controller. The dynamics of PMSMs was represented as the LPV systems depend on varying parameters. By the LPV modeling, we designed H∞ controller. Stability is proven...
This paper presents H2 control based on linear parameter varying (LPV) systems for speed control of permanent magnet synchronous motors(PMSMs). PMSMs model is rewritten in LPV systems which depend on online accessible time varying parameters given by real time information. Since the PMSM nonlinear model can be transformed into LPV systems, we design H2 control with gain scheduling. The proposed method...
In this paper, PID controller with feedforward low pass Alters (FLPFs) is developed to guarantee desired currents for a permanent magnet stepper motor (PMSM). The proposed method consist of position controller and FLPFs. The position controller consists of a PID controller, a commutation scheme, and a Lyapunov based controller. To generate the desired torque, the PID controller is incorporated. Commutation...
Since the previous position control methods for permanent magnet stepper motors (PMSMs) require states information, the methods was used to obtain the states with the observers and/or the sensors. In using observer case, the bandwidth of observer is determined by PMSM parameters. In using sensor case, since measured states have high frequency noises, low pass filters (LPFs) are used. However, using...
In this paper, a simple field weakening control (FWC) without direct quadrature (DQ) transformation is proposed for position tracking of permanent magnet stepper motors (PMSMs). The proposed method consists of the PID controller for a torque modulation and a commutation scheme to achieve FWC without DQ transformation. In proposed commutation scheme, the desired negative direct current is designed...
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