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The effect of parametric variations in three phase induction motor such as stator resistance, rotor resistance, leakage and mutual inductances on the induction motor performance variables such as input power, output power, stator current, starting current, magnetizing current, power factor, efficiency, developed torque and starting torque have been analysed. A nonlinear polynomial of the induction...
Automating repetitive tasks in the industries increases the productivity; reduces the probability of error and maintain product quality. Traditional methods of mixing fixed quantities of different types of liquids and filling them in bottles involve manual mixing of the constituent components based on measurements and bottling of the mixture as desired. Manual handling of such tasks is time consuming;...
A Programmable Logic Controller (PLC) based power factor correction method for a 3-phase Induction Motor (IM) through switching of shunt capacitors is proposed in this paper. A 3 phase IM has a low power factor (pf) at no load as it draws large magnetizing current and the active power delivered to the motor is low, which is utilized to overcome the no-load losses. The PLC based power factor improvement...
Model Reference Adaptive System (MRAS) based estimation of stator resistance in a vector controlled induction motor (IM) drive is presented in this paper. The developed algorithm utilizes voltages and currents in synchronously rotating reference frame for the estimation of stator resistance thus reducing computational complexities as compared to the other estimation methods based on flux calculations...
In this paper, a scheme for closed loop speed control of DC motor in four quadrants using Programmable Logic Controller (PLC) is discussed. The armature voltage is varied using a Class E chopper circuit. The individual switches in the chopper circuit are switched using Pulse Width Modulation (PWM) control signals generated by PLC. Duty cycle of PWM signals are varied by PID controller of the PLC....
Application of particle swarm optimisation (PSO) in efficiency optimisation of vector controlled surface mounted permanent magnet synchronous motor (PMSM) drive is presented in this study. Analytical expressions for the controllable electrical loss in PMSM are derived and optimised through control of direct axis (d-axis) stator current, according to the desired speed of operation and load torque....
This paper presents a novel method for the efficient operation of an Induction Motor (IM) Drive through selection of optimal V/f ratio. The appropriate selection of V/f ratio is used to achieve minimum losses and thereby optimizing the efficiency. The scheme proposed in this paper is implemented successfully using a laboratory 3 HP IM in real time by exploiting the features of a Digital Signal Processing...
This paper presents an implementation of automation scheme for control of three phase Permanent Magnet Synchronous Motor (PMSM) drive. Performance evaluation and monitoring of drive is described using Supervisory Control and Data Acquisition (SCADA) and Programmable Logic Controller (PLC) system. The control, operation and monitoring of PMSM drive in three basic modes, i.e. position, speed and torque...
Performance evaluation of a three-phase AC servomotor drive having Supervisory Control and Data Acquisition (SCADA) system is presented in this paper. The Supervisory Control on drive is implemented using a Programmable Logic Controller (PLC) to monitor and control the drive performance. Mathematical modeling, simulation and experimental studies have been carried out on the drive system. The drive...
In this paper an efficiency optimization algorithm for vector controlled Induction Motor (IM) Drive has been developed and the performance of the IM Drive under different operating conditions has been analyzed. The controllable electrical loss in IM Drive is minimized by the optimal control of direct axis (d-axis) stator current, which controls the magnitude of rotor flux. Thus, the efficiency of...
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