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Speed control of induction motor is one of the vastly used application nowadays. Efficient, harmonic free and affordable control is a major challenge faced by the engineers. Speed Control of Induction motor using carrier based modulation of matrix converter is excellent modulation scheme as compared other modulation techniques as it eliminates harmonics and balances any unbalanced loads. It's a pulse...
Circulating currents have been experimentally observed in pulse-width modulated ac open-end winding drives. These currents have the effect of increasing conduction losses in the stator winding resistance of the ac machine. Two major causes for these currents have been identified as device voltage drops in power semi-conductor devices and dead-time used for over-current protection. Analysis of these...
Direct Torque Control (DTC) is becoming one of the most popular control methods for induction motors.This technique was introduced in the mid 1980's for voltage fed PWM inverter drives.Matrix converter (MC) has been studied widely for its advantages over the traditional converters.It is gradually employed for applications with its maturity in theoretical studies.A novel control strategy is put forward...
This paper presents a novel sensorless direct torque controlled IPM synchronous machine fed by a matrix converter. The input power factor is controlled by applying two active switching combinations in each control cycle. The FFT spectrum analysis shows the better input quality without any negative effect on the output as compared with the classical HDTC. A torque ripple minimization strategy is used...
This paper presents an improved direct torque control (DTC) method for sensorless matrix converter drives using a multi-mode indirect space vector modulation (ISVM) and an adaptive sliding mode observer. The drive system is characterized by reduced torque and flux ripples, unity input power factor, sinusoidal input/output waveforms and good sensorless control performance over a wide speed range, while...
This paper presents a current modulation scheme for matrix converter which serves as a power electronics interface in wound rotor induction generator based wind energy conversion system. It not only efficiently decouples active and reactive power of the generation system, but also gives a good grid connection performance. The proposed wind generation system is verified via simulation.
This paper presents an improved direct torque control (DTC) scheme based on indirect space vector modulation (ISVM) for matrix converter drives. Independent closed-loop control of both torque and stator flux is achieved by using two proportional-integral (PI) controllers. The reference voltages generated by the two PI controllers are provided for an ISVM unit which replaces the switching tables in...
This paper presents a new method to improve the sensorless performance of matrix converter drives using a parameter estimation scheme. To improve low-speed sensorless performance, the nonlinearities of a matrix converter drive such as commutation delays, turn-on and turn-off times of switching devices, and ON-state switching device voltage drop is modeled using p-q-r transformation and compensated...
This paper presents a novel direct torque control (DTC) scheme of an interior permanent magnet synchronous motor (IPMSM) fed by a matrix converter. In the proposed scheme, a sliding mode torque and stator flux controller is integrated with a simplified Venturini's modulation algorithm to achieve low torque and flux ripples, sinusoidal input/output currents and unity fundamental displacement factor...
An improved direct torque control (DTC) scheme for the matrix converter fed interior permanent magnet synchronous machine (IPMSM) is presented in this paper. In the proposed scheme, the modified DTC strategy for matrix converter IPMSM drives is achieved using a variable-structure torque and stator flux controller, and indirect space vector modulation (ISVM) technique. It features low torque and flux...
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