The stator has a laminated construction, made up of stampings. On the other hand the presentation includes most recent results and includes new ones. We know about different types of synchronous motors, apart from all these motor works based on reluctance. This paper introduces the common types of electric vehicles, and studies the control techniques of sixphase induction electric machine. The reluctance motor has basically two main parts called stator and rotor. The operation of reluctance motor with diagram a media to. The stator poles have concentrated winding rather than sinusoidal winding. The performance of the reluctance motor may approach that of induction machine.
Characteristics of a three phase and single phase induction motor. Singlephase induction motor threephase induction motor singlephase induction motor there are probably more singlephase ac induction motors in use today than the total of all the other types put together. The threephase induction motor behaves as a transformer whose secondary winding can rotate. The variable reluctance motor is based on the principle that an unrestrained piece of iron will move to complete a magnetic flux path with minimum reluctance, the magnetic analog of electrical resistance. The course includes a general overview of various types of motors and there operation. The basic idea of an electric motor is to generate two magnetic fields. The basic difference is that the load is mechanical.
Induction motor theory advanced linkedin slideshare. This is a 4phase machine with 4 stator pole pairs and 3 rotorpole pairs 86 motor. The characteristic variation of inductance of a sr motor is shown in figure 2. Motor speci cations usually involve several quantities. A reluctance motor is a type of electric motor that induces nonpermanent magnetic poles on the ferromagnetic rotor. When a voltage is applied to the stator of an induction motor, a magnetic field begins to rotate in the stator. Pdf analysis of single phase induction motor and switched. A reluctance motor torque is produced due to the tendency of the rotor to align itself in the minimum reluctance position, when the speed of the motor is close to the synchronous speed.
An engineering guide to ac and dc motor designs and operation. The rotor has neither windings nor permanent magnets. Disadvantages include high torque ripple when operated at low speed, and noise due to torque ripple. To obtain the variation of no load power and current and blocked rotor power and current with changes in the applied voltage to the stator. The induction motor is made up of the stator, or stationary windings, and the rotor. A switched reluctance motor is also known as a variable reluctance motor.
What is the operating principle of a 3 phase induction motor. Motor runs at slip speed reluctance torque, trel reluctance torque, trel maximum reluctance torque, trelmax occurs at. The rotor of a reluctance motor is a squirrel cage with some rotor teeth removed in the certain places to provide the desired number of salient rotor poles. Ac and dc motor designs and operations are explained in this article. Conventionally, the speed of a capacitor run singlephase induction motor is controlled by using an ac voltage controller generally a triac between the supply voltage and the motor. Explain how this motor can be operated as either a synchronous motor or a plain induction motor. In this way the book will prove stimulating to those. Other articles where reluctance motor is discussed. The operating principle of a 3 phase induction motor is based on the production of a rotating magnetic field r. The load inertia should be within the limits, for proper effectiveness.
Theory of synchronous reluctance motor the synchronous reluctance motor is a threephase electric motor without permanent magnets and with a magnetically anisotropic rotor structure. Fundamentals of electric motor design motion control online. Based on the type of input we have classified it into single phase and 3 phase motors. The theory used in the work was collected by studying literature on how electrical motors work, and by simplifying the explanations to suit the intended reader. For example, this rotating magnetic field may be 1800 rpm.
Target motor theory 4 3phase ac induction motor vector control motorola 3. Besides, the reluctance to the magnetic field is greater on account of the presence of the airgap across which the stator power is transferred to the rotor. For variable speed drives, the source is normally an inverter that uses power. Pdf efficiency analysis of synchronous reluctance motors.
Other motors that are included are 1phase induction motors, permanent synchronous motors and synchronous reluctance motors. The stator magnetic field is generated by a permanent magnet. Reluctance motor subtypes include synchronous, variable, switched and variable stepping. Design and comparative study of induction and synchronous. This video gives basic operating principle of reluctance motor. Reluctance is a function of rotor position in a variable reluctance motor. This paper proposes a comparison study between induction motor im and synchronous reluctance.
The stampings are slotted on its periphery to carry the winding called stator winding. Describe how a squirrel cage motor is built, and classify it as either an induction motor or a synchronous motor. When the rotor is at a stand still 0 rpm the rotating magnetic field of the stator cuts the conductors of the rotor at a. Among 3 phase induction motors and synchronous motors are more widely. This article will serve as a comprehensive guide for articles related to ac and dc motors. Reluctance motors operate on the principle that forces are established that tend to cause iron poles carrying a magnetic flux to align with each. The electric vehicle is a powerdriven vehicle, and with the increasing tense of resources in modern society, it has important significant for the development and application of electric vehicle. Simulation and testing of a switched reluctance motor by.
The figure below shows the 4 pole reluctance type synchronous motor. Secondly, we have seen that the speed at which the primitive motor. Consult the slosyn motor catalog for a complete description of the motor identification system and a list of the motors available. This is part 1 in a 4 part series of web seminars related to controlling a brushed dc motor using a microcontroller. One form of reluctance motor is shown in cross section in the figure. A read is counted each time someone views a publication summary such as the title, abstract, and list of authors, clicks on a figure, or views or downloads the fulltext. Theory and analysis of three phase induction motor using written pole technology kishor s. Students will gain understanding of fundamental concepts and terminology of basic electricity and magnetism, motor construction, and basic motor theory. It is logical that the least expensive, lowest maintenance type motor should be used most often. In general, the induction motor is cheaper and easier to maintain compared to other alternatives. Reluctance motor basic operating principle youtube. Developed for non engineers in need of basic motor theory, operation and application knowledge. Fundamentals of electric motor design about the course developed for those involved in the design, application, testing or manufacturing of motors this course will provide a better understanding of electric motor selection, mechanics and performance.
The stator is in thestationary electrical component. Analysis on the mathematical model of the sixphase induction. The concept of the rotating magnetic field is central to ac motor theory, so it is imperative that students grasp this concept before moving on to more advanced concepts. Here we will discuss construction and working principle of reluctance motor. In the fourpole version, the rotor has four high and four low performance axes. Permanent magnets synchronous motor control theory kept constant, hence the name vf control. If current is applied to the winding the rotor will turn until it reaches a position where it is aligned with the coils, at which point the inductance of the magnetic circuit is a minimum. Characteristics and work principles of switched reluctance. Our 60 minute guide to motor maintenance is designed to give you, the engineer, all the information you need in industrial electric motor maintenance in a format that is concise, easy to understand and is a point of reference. If you happen to have a string of blinking christmas lights to use as a prop in illustrating a rotating magnetic field, this would be a good thing to show your students. What is common to all the members of this family is that the basic physical process involved in their operation is the conversion of electromagnetic energy to mechanical energy, and vice versa. Both motor types use the same stator, but have different rotors. Learn vocabulary, terms, and more with flashcards, games, and other study tools. Sequential switching figure below of the stator phases moves the rotor from one position to the next.
Basic induction ac motor operationan ac motor has two basic electrical parts. We not only talk about different type of motors but we also see how different motors work under different conditions. Theory and analysis of three phase induction motor using. Basic motor theory, operation, and application course outline i. Themotorisallowedtorunatnoload,andissuppliedwithvarious voltages at nofcmal frequency,rangingfrom 25 percentabove normaltoa value at which the motorwill just continuerunning. Design and comparative study of induction and synchronous reluctance motors loubna boudjelida 1, redjem rebbah and mohamed yazid kaikaa1 1department of electrotechnique, university of frere mentouri constantine1, constantine, algeria abstract. To determine the equivalent circuit parameters of an induction motor. An ac motor is an electric motor driven by an alternating current ac. If the rotating field of a large synchronous motor with salient poles is deenergized, it will still develop 10 or 15% of synchronous torque. Starting from a basic understanding of linear algebra the theory is presented with complete proofs. Reluctance motors can deliver high power density at low cost, making them attractive for many applications.