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The contribution deals with steady state estimation of an electromagnetic torque ripples and a current waveform of a two-phase induction motor (IM) supplied by an three-leg IGBT bridge connected voltage source inverter (VSI). The inverter's output voltage is controlled by a modified sinusoidal SPWM of the input DC voltage. The complex Fourier series analysis of the inverter's output voltage was made,...
According to the multivariable and strong coupling characteristics of back-to-back converters and induction motors, In this paper, the four quadrant operation and bidirectional energy flow of induction motor are studied by combining sliding mode control and port controlled Hamilton (PCH) system theory. First of all, the external loop controller of voltage, speed and flux is established by sliding...
The paper presents a complete solution for speed sensorless control system for five-phase induction motor with voltage inverter, LC filter and nonlinear control of combined fundamental and third harmonic flux distribution. The control principle, also known as multiscalar control, nonlinear control or natural variables control, is based on a use of properly selected scalar variables in control feedback...
This research presented multilevel inverter using cascade transformers to supply the output voltage levels which are used to control speed of asymmetrical two-phase induction motor. Two sets of full bridge inverters and transformer with difference of number of turn ratio are combined to generate the voltage levels to supply each winding of asymmetrical two-phase induction motor. Triangular multicarrier...
Asynchronous motors are widely applied in industry, agriculture production and daily life, but in practical application, asynchronous motor often works in empty or light load because of various factors, leading to a low power factor and efficiency, which cause a great waste of energy. Therefore, it is of important practical significance to research of asynchronous motor energy conservation issue....
Electrical motors have been used for more purposes for several industrial applications. The operational behavior of an electrical motor in an industrial environment plays a major role in terms of controlling, monitoring and measurement. The energy efficient becomes a necessary consideration for analysis of speed control of electrical motor. The different papers have been published in the above mentioned...
This paper presents a modified control strategy to improve the performance of a 3-phase induction motor drive system fed by a standalone PV power source. The main functions of the proposed control strategy are: 1) ensuring successful motor starting, 2) matching the on-site induction-motor pumping load with the available PV power, and 3) forcing the PV system to operate at the maximum power point....
Energy efficiency of the process equipment is achieved by the use of modern energy-saving electric drives. One of the ways of development such systems is the use of induction motor electric drive with power factor correction (PFC). The article provides analysis of PFC, built on the boost voltage converter, develop of its control system and also functional model, made in Matlab Simulink.
The induction machine is the work horse of the industry. It has rugged construction and is suitable for many high power applications. It has also been a key aspect in revolutionizing the locomotive and the automotive industries. For such automotive applications speed control becomes the driving factor. Hence in this we discuss controlling the speed of 3-phase induction motor using constant volt per...
There is a possible risk of the voltage capability of stator winding insulation recommended by existing standards being exceeded in many cases of the induction motors which are connected to the long cabels. Hence some of the improvement methods need to be implemented for long cable which are fed to the adjustable speed drives with PWM technique. This paper proposes that the modeling of the Induction...
In typical traction Electric Vehicle applications, the DC-link voltage varies during transient accelerating and decelerating process in field-weakening region. The calculated reference voltages of current PI regulators tend to be larger than the one in steady state, which will result in the undesired flux-producing current oscillations. This further deteriorates the electromagnetic torque performance...
In this paper, the simulation of dynamic model of Linear induction Motor (LIM) using Model predictive control (MPC) is presented. Various control methods have been previously proposed for the control of three phase two level inverter. A Model Predictive Control method is a simple and powerful control scheme used for the control of voltage of a three-phase inverter. A discrete time model of the inverter,...
The three-phase Power Electronic Load (PEL) simulation of the asynchronous motor operation can be the divided into AC sine wave drive mode, the inverter open-loop drive mode and the inverter closed-loop drive mode. The control strategy of these three kinds of working conditions is simple to complex, and has certain inheritance and progressive relations. In the AC sine wave drive condition, the discrete...
This paper is based on the Diametrical Inversion (DI) technique which can be utilized for speed control of centrifugal pump. Lots of techniques are discussed in area of power electronics for smooth control over speed in case of centrifugal pump. Main purpose is to control the flow of centrifugal pump using Diametrical Inversion (DI) Technique, in which phase sequence of one of the voltage phasor is...
There has been an increasing interest in the development of energy-efficient appliances using renewable energy sources. This paper deals with a Photovoltaic (PV) powered BLDC drive as a sustainable solution to air conditioning compressor drive. Compressor of an air conditioner (AC) accounts for 95% of its total power consumption. The bottle necks of operating a compressor drive on PV are: supplying...
This paper proposes the extending application of permanent magnet synchronous machines (PMSMs) without damping windings, or non-line-start PMSMs (NLSPMSMs) to achieve effective soft start and synchronous switching from inverter drive to grid drive. The system electromechanical model during switching is deduced, and numerical analysis is adopted to verify the stability under grid drive. For the control...
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...
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 paper deals with steady state analysis of electromagnetic torque ripples of a three-phase induction machine, which is supplied by an IGBT transistors bridge connected inverter. The inverters output voltage is controlled by PWM from the input DC voltage. The complex Fourier series analysis of the inverter output voltage was made, in order a spectrum of the harmonic supply voltages. The different...
This paper presents a method for improvement of the dynamic characteristic for V/f controlled induction machines. The basic control structure is the open-loop V/f control with voltage-drop compensation and slip compensation. Additionally, a new current damper control is utilized for suppressing the dynamic oscillation. The improvement of the current control is based on complete modal synthesis. In...
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