Adjustable Speed Induction Motor Drive

During the last decade, permanent magnet synchronous motors have been used widely in the industry to replace DC motors and induction machines. The main characteristics of these motors are the low inertia, the high efficiency, power density and reliability. Due these

Brushless DC motors are a vital part of the technology we use today in many different aspects of life; a common being computers. This essay will study how a brushless DC motor works, it’s pros, cons and how it compares to a brushed DC motor. Throughout will be various physics concepts and terms in order to provide the most accurate and detailed explanation.

Starting Current of both motors were different, when analyzed using ETAP. Starting current of Induction motor was more than that of the synchronous motor. However Induction motor is used for Stable operation in running condition [1]

It seized above 60 years to appear at the conception of the induction motor, here are a little of the most prominent contributors to the invention.

In this chapter, an overview of the state of the art system of an induction motor is carried out. It looks at various induction motor control methodologies utilizing current and voltage control to control the flux and the torque of the dynamic system. Highlight of the current and future challenges of induction motor drives are presented. To do that, a general principle of induction motor drives is discussed first follow by phase controlled of induction motor drives, frequency controlled of induction motor, and vector controlled of induction motor.

The brushless DC motors are becoming more popular in low and medium power applications due to the characteristics they have such as better speed versus torque characteristics, high dynamic response, high efficiency, noiseless operation and higher torque to weight ratio. They also have a long life span. With rapid development in power electronics, semiconductor and manufacturing technology for high performance magnetic materials, the brushless DC motors have been used for energy savings applications such as air conditioners, refrigerators, air pumps, kitchen appliances and electric vehicles.

Abstract—This paper proposes a method for optimization of the harmonic performance of CHB inverter under Selective Harmonic Elimination PWM modulation (SHEPWM) control. The proposed optimization techniques are used to solve the set of non-linear transcendental trigonometrical equations. SHE were implemented to reduce the THD value. The set of non-linear transcendental equation is minimized by proposed Big Bang-Big Crunch optimization technique. The proposed topology is suitable for any number of levels. In this paper third, fifth, seventh and ninth level harmonics have been eliminated. Simulation work is done in MATLAB software and experimental results have been presented to validate the theory.

However, the problems are found in these motor for variable speed operation over last decades keeping technology growth in power semiconductors, microprocessors, adjustable speed drivers control schemes and permanent-magnet brushless electric motor production have been joined to enable reliable, cost-effective solution for a wide area of adjustable speed applications.

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Abstract: - SEDC motors are used extensively in industrial variable speed applications because of most demanding speed-torque characteristics and are simple in controlling aspects. This paper presents an implementation of internal model control (IMC) for speed control of separately excited SEDC motor based on LabVIEW. A mathematical model of the process has been developed using real plant data and then conventional controller has been designed. A comparative analysis of performance evaluation of controller has been done.

1) are derived first by algebraically solving the equivalent circuit shown in Fig. 2. These extreme values include maximum torque, maximum mechanical power, maximum power factor, maximum efficiency, and maximum electric power. It will be shown that the torque and mechanical power extrema can be expressed in analytical forms while the power factor, efficiency and electric power extrema need to be solved numerically. It will then be shown that these extrema can also be determined graphically using the circle diagram method. The circle diagram method is an old method but can still be found in some textbooks (e.g., [3]-[4]). The research into graphical methods for induction motor analysis is still active (e.g., [5][11]). One may consider that the circle diagram method is limited to qualitative evaluation because it cannot give accurate results. In fact, if the circle diagram method is carried out by a modern computer drawing tool that allows the user to draw geometric diagrams with parameters (i.e., coordinates, lengths, angles, etc.) to the accuracy of four decimal places, then the circle diagram method is able to give all the aforementioned performance extrema with required accuracy. Unlike the circle diagram method used in [10] and [11] that is based on the approximate equivalent circuit of induction machine and is limited to motoring mode of operation, the circle diagram method used in this paper is based on

Induction motor is widely used in many different industries, it is a kind of machine use AC electric power to generate magnetic force and field from the stator winding. The different of induction motor from other kinds of motors is that induction motor need no automatic commutation, separate-excitation or self-excitation from stator to rotor to changing the power. Rotor voltage is induced in the rotor rather than being

A notable application of Nikola Tesla’s Alternating Current induction motor is the Electric Vehicle (EV). EVs are powered by an electric motor rather than a conventional gasoline engine. It is important to make the distinction between an EV and a hybrid, plug-in hybrid, or hydrogen fuel cell car. For our analysis, an EV is a vehicle that is completely driven by an electric motor, which is powered by a large battery, such as the BMW i3 and the Tesla Model S.

BRIEF DESCRIPTION OF MOTORS AND DRIVES: In this segment, I will briefly review the diverse types of variable-speed drives used in the industry. For the most part, electronic AC and DC drives find their domination in manufacturing and commercial HVAC uses of today. This brief look at drive machineries will assist you, should you encounter any of these types in the future. In addition, I will also review the benefits and limits of each type.

Abstract: The area of the multiphase motor has experienced a significant growth in last decade numerous interesting development have been reported in the literature in this chain this paper is an attempt to mathematically model both three phase and six-phase induction motor for comparison of their characteristics. Using this mathematical modeling a Simulink model is created whose results shows that the six-phase induction motor can sustain more than four times the torque that can be sustained by three phase induction motor of same design parameters. The six-phase motor is better not just in torque handling capacity but it also has inherent advantages of the multiphase induction motor.