Shape Design of a Rotor Bar for Improving Starting Torque And Running Efficiency in Squirrel Cage Induction Motor Ha Jeong Lee1, Sang Hyeon Im1 and Gwan Soo Park1 1School of Electrical and Computer Engineering, Pusan National University, Busan 46241, South Korea gspark@pusan.ac.kr This paper presents a design of rotor bar to improve the starting torque. US Patent for Current-energized synchronous motor A current-energized synchronous motor (1) suitable in particular for vehicle drives. It includes a stator (2) and a rotor (3) carrying the energizer winding (7). The rotor (3) has at least two rotor poles (4) with one energizer winding (7) each. The rotor includes at least one selective magnetic flux barrier, in particular in the form of a radial slot (8) along the main axis (4A) of the rotor A Performance Comparison of Different Rotor Types for High cannot withstand the large rotational stresses caused by the high circumferential velocity of the rotor. Practical studies have shown that a squirrel-cage rotor cannot operate at speeds of 50,000 rpm [1]. When a high-speed application is targeted, a solid rotor … (PDF) DESIGN OF ELECTRICAL MACHINES | RA M - Academia.edu UNIT IV INDUCTION MOTORS 9 Output equation of Induction motor – Main dimensions – Length of air gap- Rules for selecting rotor slots of squirrel cage machines – Design of rotor bars & slots – Design of end rings – Design of wound rotor -– Magnetic leakage calculations – Leakage reactance of polyphase machines- Magnetizing current
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Parameters Estimation of Squirrel Cage Induction ... First it was carried out the no-load test and the impedance test (including the locked-rotor test with 60 Hz) of a 1.5 HP, 2-pole, 380 V, squirrel cage induction motor. It is connected in star being classified as “High Efficiency” or “IE2” and it has the closed rotor slots. Optimal Design of Rotor Slot Geometry of Squirrel-Cage ... Optimal Design of Rotor Slot Geometry of Squirrel- Cage Type Induction Motors V. Fireteanu*, T. Tudorache* and O.A. Turcanu* * POLITEHNICA University of Bucharest /Electrical Eng. Dept., EPM_NM Lab., Bucharest, Romania Abstract—This paper deals with the optimal design of squirrel- cage rotor slots and copper bars of high power induction motors III. Design of a Three Phase Squirrel Cage Induction Motor for ...
Shape Design of a Rotor Bar for Improving Starting Torque And Running Efficiency in Squirrel Cage Induction Motor Ha Jeong Lee1, Sang Hyeon Im1 and Gwan Soo Park1 1School of Electrical and Computer Engineering, Pusan National University, Busan 46241, South Korea gspark@pusan.ac.kr This paper presents a design of rotor bar to improve the starting torque.
Designing Squirrel Cage Rotor Slots with High … Deep bar and multiple cage effects are useful in design of such machines. It is shown that a useful understanding of how different slot shapes work mayThe objective is to make motors more efficient because of the higher conductivity of copper. In addition, the reduced losses in such motors may... Designing Squirrel Cage Rotor Slots with High …
A squirrel-cage rotor is the rotating part of the common squirrel-cage ... the revolving magnetic field passes the rotor bars at a high rate, ... A synchronous motor may have a squirrel-cage winding embedded in its rotor, ...
Squirrel Cage Induction Motor - an overview ... The wound-rotor motor is a variation of the squirrel-cage induction motor. While the stator is equivalent to that of the squirrel-cage motor, it has a set of windings on the rotor which are not short-circuited, but are terminated to a set of slip rings. These are helpful in adding external resistors and contactors. Designing Squirrel Cage Rotor Slots with High Conductivity… conductivity of cast copper in rotors of induction motors. Deep bar and multiple cage effects are useful in design of such machines. It is shown that a useful understanding of how different slot shapes work may be developed through the use of frequency response curves that describe rotor slot impedance as a function of rotor frequency.
The rotor was in two layers with the inner layer of high conductivity .... Majority of the squirrel cage induction motors are provided with copper rotor ... In applications where a good starting torque is required, designers ... What is the difference between normal slot and deep bar rotor slots of induction motor?
ICEM 2004 Contents - Middle East Technical University Designing Squirrel Cage Rotor Slots with High Conductivity . J.L. Kirtley Jr. Application of Circuit and Field-circuit Methods in Designing Process of Small Induction Motors with Stator Cores Made from Amorphous Iron . ... stator- and Rotor-Force Excitation for the acoustic Simulation of an Induction Machine with Squirrel Cage Rotor . Axial Flux Sheet Rotor Induction Motor:Operation high pressure pumps, high speed compressor systems [2]. The present paper discusses the experiences with an Axial Flux Sheet Rotor Induction Motor. The absence of windings or squirrel cage in the rotor makes the construction of rotor much simpler as compared to the AFIM with slip ring or cage rotor. Starting process of medium power line start permanent bottom slots openings To increase double cage motor starting torque with saving motor starting current ir resistance of top squirrel cage must be lower and simultaneously bottom squirrel cage leakage reactance greater. It can be done by increasing conductivity of the top squirrel cage material and constricting bottom slots openings. Motor rated Designing, prototyping and testing of a ferrite permanent
High electrical conductivity of copper in the rotor structure of a squirrel cage induction motor can achieve a reduction in overall energy losses of around 11%–19% and a consequent increase in energy efficiency. This paper reviews the implementation of Die-Cast Copper Rotor (DCR) Motor, Efficiency Advantage of Skewed Stator Slots in the Rotor of Induction ... Advantage of Skewed Stator Slots in the Rotor of Induction Motors? In the Induction motor design, the rotor slots are purposely made with a slight skew arrangement. Construction of squirrel cage ... Thermal Analysis of Duplex 3-Phase Induction Motor Under ... the stator slot area where the copper conductors are located together with the slot insulation, the conductor insulation and the impregnation material. This problem is solved by using an equivalent thermal conductivity. A. Equivalent slot thermal conductivity [13] The effective properties of the two dominant isotropic