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The stable operation regions are the important issues for direct torque control (DTC) system of permanent magnet synchronous motor (PMSM). The influences of the parameters, such as voltage, current, flux linkage and load angle, on the system operation are investigated through the analysis model presented in this paper. The analysis results show that the parameters must be properly regulated within...
In this paper, a pure torque loop control method without flux linkage observer and a modified double closed loop control method with a couple of derived simple equations for the control of the stator flux linkage amplitude were proposed for direct torque control (DTC) of brushless DC motor (BLDCM), using a 2-phase conduction mode. The objectives of the novel control strategies are trying to simplify...
The phase inductance character of permanent magnet synchronous motor (PMSM) is closely related to its saliency, which has significantly influence on the position estimation using high frequency signal injection at low speed. In this paper, the relationship between phase inductance harmonics and position estimation error is discussed with qualitative and quantitative analysis, which is helpful for...
This paper presents an improved direct torque control (DTC) method for permanent magnet synchronous motors. The proposed DTC method generates the diver signal with SVPWM for the fixed switching frequency and low torque ripple relative to conventional hysteresis controllers. Different with the popular SVM-DTC, the proposed method obtains amplitude and angle of reference voltage vector directly by the...
This paper provides the development and field validation of the following microgrid components: a 1 kW wind turbine generator, 2.5 kW solar panel, 5 kW vanadium redox battery (VRB), and a 2 kW fuel cell with hydrogen storage.
The objective of this paper is to present a novel five phase fault tolerant doubly salient electromagnetic generator (DSEG) for direct driven wind turbine. The novel generator has same distinct features as follows: first, the generator configuration is simple and reliable. The output voltage is controlled by DC exciting current easily and the position sensors and the active power converters are not...
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