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The follow-up control system has the feature of input signal random changing. On the basis of motor driving technology, the system can follow the change of the input signal. Permanent Magnet Synchronous Motor (PMSM) has small output torque ripple feature. Thus it has broad application prospect in the follow-up control system. The vector control of PMSM has coupling feature, reducing the speed dynamic...
In order to reduce energy consumption, we have developed a technique that quickly reverses salient poles in permanent magnet (PM) motors. When this proposed technique is used, because of this permanent magnetization, PM motors can change negative salient poles to positive salient poles. This paper proposes a novel PM motor that uses our proposed technique to reverse saliency and describes the principle...
The closed-loop speed control for a high speed switched reluctance machine (SRM) is studied in this paper. A speed-and-current dual closed-loop control scheme is selected for speeds as high as 50 krpm. The novelty of the proposed control method is inclusion of the inductance profile selection for a flux-bridge rotor. In this paper, the nonlinear SRM is modeled in a linearized form by small signal...
This paper proposes a speed-control law for a parametrically uncertain surface-mounted permanent magnet synchronous motor (SPMSM) using a multivariable approach, which robustly and optimally stabilizes the tracking error dynamics using only the lower and upper bounds of the SPMSM parameters. The contributions of this article are twofold. First, both the inner- and outer-loop controllers are designed...
Switched reluctance (SR) motors have many advantages such as simple and solid construction, low-cost on manufacturing, excellent reliability at high temperatures, and large torque density. However, the higher torque ripple from magnetic saliency is a serious problem preventing its applications from being expanded. Several torque control methods have been already proposed. In practical use, a controller...
This paper presents a new self-tuning fuzzy logic control (FLC) based speed controller of a switched reluctance generator (SRG) for wind power applications. Due to its doubly salient structure and magnetic saturation, the SRG possesses an inherent characteristic of strong nonlinearity. In addition, its flux linkage, inductance, and torque are highly coupled with the rotor position and phase current...
This paper proposes the predictive controller design for a sensorless interior permanent magnet synchronous motor drive system. The predictive controllers include a current-loop predictive controller and a speed-loop predictive controller. By using the proposed control algorithms, the closed-loop sensorless interior permanent magnet synchronous motor drive system can achieve fast transient responses,...
This paper proposes a new closed loop speed control of an induction motor fed by a high performance Z-source inverter (ZSI), the speed control is based on V/F control and indirect field-oriented control (IFOC) strategies. The indirect field-oriented control based on PWM voltage modulation with voltage decoupling compensation is used to insert the shoot-through state within the switching signals. A...
The windup phenomenon caused by the current limitation and PWM voltage regulation in the brushless DC motor (BLDCM) double PI loop speed regulating system has been investigated. And the anti-windup controller has been applied to suppress the relevant windup phenomenon. The simulation illustrates that the anti-windup controller make the BLDCM speed regulating less overshoot and quickly dynamic response...
This paper presents a new approach to control the turn-off angle θoff used to excite the Switched Reluctance Motor (SRM) used in electric vehicles (EV). The controller selects the turn-off angle which will improve the performance of the electric drive system with turn-on angle constant. This control scheme consisting of classical current controller and speed controller depend on lookup table to choose...
The DC motor disturbance torque can be calculated using the known voltage input to the motor and the measured motor speed response. The cogging torque and friction can be estimated from the calculated disturbance torque. The calculated disturbance torque can be further utilized on-line to eliminate the speed ripples in speed regulation applications. Experiment results demonstrated the effectiveness...
Elimination of the electrolytic capacitor in the inverters of motor system driven domestic appliances is desirable, because the electrolytic capacitor increases the appliance volume and has the problem of short lifetime. Two different control methods for an interior permanent magnet synchronous machine (IPMSM) speed control system without an electrolytic capacitor are compared. The performance of...
This paper presents a method for estimating the torque and speed of line-start induction motor (IM). IM is being used for various purposes because that is a high trust machine for the load mechanism and can be used easily. So, IM is non-breakable. However, load mechanism sometime break. We try to check the condition of load mechanism by estimate the torque and speed of IM. We take up the motor-operated...
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