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A closed form solution is presented for the transient and steady-state response of surface permanent magnet synchronous machines to single FET short circuit failure in the drive. PWM techniques such as sine and discontinuous switching schemes are compared with respect to the motor performance under such fault condition. With the help of the analytic model the sensitivity of the key control parameters...
Multilevel inverters give a near sinusoidal output, thus avoiding the need of a bulky filter in the inverter output. This paper proposes a novel three phase three level multilevel inverter using switched capacitors. The operating frequency is 400Hz, thus enabling its usage in aircraft and aerospace applications. The circuit is simulated using MATLAB Simulink and results are analyzed. A prototype is...
This paper brings forward a hybrid converter derived from the Split-Pi converter, which can provide simultaneous ac as well as dc outputs from the same dc input. The proposed converter can work both as a step up and step down converter, whereas most of the available hybrid topologies work in step up mode only. The inbuilt property of shoot through protection in inversion stage, makes this converter...
In this paper, space vector pulse width modulation (SVPWM) based induction motor drive is analyzed, designed, simulated and tested. The aim of this article is that it gives the view about the SVPWM wave generation, active and null time period calculation for switching operation in each sector. Simulation and experimental results of induction motor drive for both SVPWM and sine triangle PWM techniques...
The gate signals in a commercial three-phase two-level induction motor drive are translated to operate a three-phase three-level neutral point clamped (NPC) inverter. An FPGA is used to demodulate the two-level gate signals and then to generate NPC gate drive signals by re-modulation. A sine PWM modulation strategy with in-phase disposition of carriers is used to generate NPC gate drive signals. The...
This research is design and construct of Sine Pulse Width Modulation (SPWM) 4-leg voltage source inverter for controlling speed of asymmetrical two-phase induction motor. The Sine PWM switching signal is generated by ARM7 (Adu7024) microcontroller which is programmable and cheap, while having high frequency to generating switching signal. Two ICs No. IR2130 are used for motor driving part. The characteristics...
A four leg voltage source inverter (VSI) based active filter is implemented for elimination of neutral current, harmonics compensation with load balancing. It is controlled through an algorithm based on learning vector quantization (LVQ) under current fed type nonlinear load. This double stage supervisory control algorithm is used for extraction of reference supply currents. A small rating VSI based...
This paper presents a STATCOM based reactive power compensation control using MATLAB/SIMULINK. Whenever the reactive power compensation take place at the distribution side for the different load condition, STATCOM plays a major role to support the reactive power compensation in generation and transmission system. With the PI controller a reference voltage is generate with the sinusoidal PWM pulse...
This research is design and construct of Sine Pulse Width Modulation (SPWM) 3-leg voltage source inverter for controlling speed of asymmetrical two-phase induction motor. ICs No. IRF2130 are used for motor driving part. The characteristics of output current signal are nearly closed to sinusoidal pattern, so that low harmonics and high efficiency for motor control are obtained. The Sine PWM switching...
The objective of this paper is to make the arcane of multilevel inverters more lucid for the fresh researchers and young students of the under graduate and post graduate course at UIT-RGPV, Bhopal. A Single Phase Cascade connected H-Bridge Five Level Voltage Source Inverter is realized, using Pulse Generator and Sine PWM Firing Technique. The Inverter is of type fixed voltage and variable Frequency...
A Z-source inverter with a customized modified reference (sine) based pulse width modulation technique is proposed for energy conversion systems e.g. hybrid vehicle. In this system six reference and one carrier signal are used to generate switching pulses. This paper is to demonstrate that the Z-source inverter will boost the AC voltage whenever required, and give minimum output distortion and maximum...
This paper presents a brushless DC motor sensorless driver with sine pulse width modulation signal. For speed control, the current feedback is included to the closed loop control strategy to decrease the power consumption and increase the motor performance. In addition, the sine wave phase-changing signal is closed with a set of specific electrical angles in the zero crossing point to detect the back...
Fully digital AC drives with pulse width modulator inverters are becoming an industrial standard. For PWM inverters the most commonly used is the conventional sine PWM (SPWM). An attempt to improve this carrier based strategy is presented by means of the introduction of discontinuous techniques; such as the dead band PWM (DBPWM) and the modified SPWM (MSPWM). Their characteristics and qualities are...
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