Note that the resultant vector of two revolving flux vectors is a stationary vector that oscillates in length with time along X-axis. Therefore, an alternating field can be replaced by two relating fields of half its amplitude rotating in opposite directions at synchronous speed. This theory is based on the fact that an alternating sinusoidal flux can be represented by two revolving fluxes, each equal to one-half of the maximum value of alternating flux (i.e., m/2) and each rotating at synchronous speed in opposite directions. The double-field revolving theory is proposed to explain this dilemma of no torque at start and yet torque once rotated. Nor can it be employed fur a motor located at some inaccessible spot.Įxplain why single phase induction motor does not start in the light of Double-Field Revolving Theory? This method of starting is generally not convenient for large motors. Once the motor is running at this speed, it will continue to rotate even though single-phase current is flowing through the stator winding. As a matter of fact, the rotor quickly accelerates until it reaches a speed slightly below the synchronous speed. If the rotor of a single-phase motor is rotated in one direction by some mechanical means, it will continue to run in the direction of rotation. What is basic method to start single phase induction motor and why it is not preferred? Consequently, the alternating flux cannot produce rotation in a stationary squirrel-cage rotor. The field polarity reverses after each half cycle but the field does not rotate. The single-phase stator winding produces a magnetic field that pulsates in strength in a sinusoidal manner.
Why single phase induction motor does not self starts? Unlike a 3-phase induction motor, a single-phase induction motor is not self- starting but requires some starting means.
ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.) Filing date Publication date Priority to US201261731618P priority Critical Application filed by Emerson Electric Co filed Critical Emerson Electric Co Priority to US13/835,087 priority patent/US20140154115A1/en Assigned to EMERSON ELECTRIC CO. Original Assignee Emerson Electric Co Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.) Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.) Abandoned Application number US13/835,087 Inventor Matthew Paul Bingaman John Patrick Powers Current Assignee (The listed assignees may be inaccurate.
SINGLE PHASE MOTOR WINDING PDF
Google Patents Scroll Compressor Having A Single Phase Induction Motor With Aluminum Windingsĭownload PDF Info Publication number US20140154115A1 US20140154115A1 US13/835,087 US201313835087A US2014154115A1 US 20140154115 A1 US20140154115 A1 US 20140154115A1 US 201313835087 A US201313835087 A US 201313835087A US 2014154115 A1 US2014154115 A1 US 2014154115A1 Authority US United States Prior art keywords scroll compressor winding slots windings stator core Prior art date Legal status (The legal status is an assumption and is not a legal conclusion.
Google Patents US20140154115A1 - Scroll Compressor Having A Single Phase Induction Motor With Aluminum Windings US20140154115A1 - Scroll Compressor Having A Single Phase Induction Motor With Aluminum Windings
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