Single phase induction motors

Claim 2

In an AC single phase induction motor having a stator and rotor, said stator having an axis and said rotor being mounted so as to rotate about said axis, said stator having stator coil means for creating stator magnetic flux, said coil means being adapted to be connected to an AC current source, said rotor having electrical conductors extending in the direction of the length of said stator coil means and means electrically connecting the ends of said conductors, the improvement which comprises: auxiliary winding means for creating a time delayed magnetic flux field in response to current flow in said conductors in said rotor, said auxiliary winding means being unconnected to said current source, said auxiliary winding means being located within said stator and extending only part of the length of said stator coil means and of said rotor and being positioned with respect to said stator coil means so the magnetic poles caused by current flow in said auxiliary winding means are physically displaced from the magnetic poles created by current flowing through said stator coil means, the extremities of said conductors and said stator coil means being physically displaced from one another so that the magnetic poles produced by current flowing through said conductors are displaced from the magnetic poles produced by said stator coil means.

Claim 3

An induction motor as claimed in claim 1 wherein: the extremitIes of said conductors and said stator coil means are displaced from one another at one of the ends of said rotor and said stator in an amount of from about 45 to about 135 electrical degrees around said axis.

Claim 4

An induction motor as claimed in claim 1 wherein: the extremities of said conductors and said stator coil means are displaced from one another at one of the ends of said rotor and said stator in an amount of about 90 electrical degrees around said axis.

Claim 5

An induction motor as claimed in claim 1 wherein: the ends of said stator coil means at the ends of said stator are displaced around said axis so as to achieve said displacement of the extremities of said conductors and said stator coil means.

Claim 6

An induction motor as claimed in claim 1 wherein: said auxiliary winding means includes an auxiliary coil means, the ends of said auxiliary coil means being directly connected to one another so as to short out said auxiliary winding means and connect said auxiliary coil means in an endless series.

Claim 7

An induction motor as claimed in claim 1 wherein: said auxiliary winding means includes an auxiliary coil means, the ends of said auxiliary coil means being connected to one another through a capacitor.

Claim 8

An induction motor as claimed in claim 1 including: a second auxiliary winding means located within said stator and positioned with respect to said stator coil means so that the magnetic poles caused by current flow in said second auxiliary winding means are displaced from the magnetic poles created by current flowing through said stator coil means and are displaced from the magnetic poles created by current flowing through said stator coil means, and from the magnetic poles created by current flowing through said first mentioned auxiliary winding means, and switch means for controlling current flow in both of said auxiliary winding means, said switch means being capable of connecting extremities of either of said auxiliary winding means so as to short out the same in an endless path when the extremities of the other of said auxiliary winding means are not connected so that no current will flow through the other of said auxiliary winding means, the direction of said rotor rotation being dependent upon which said auxiliary winding means has its extremities connected.

Claim 9

An induction motor as claimed in claim 1 wherein: said auxiliary winding means are located within said stator so that the magnetic poles caused by current flow in said auxiliary winding means are displaced from the magnetic poles created by current flowing through said stator coil means in an amount of from about 45 to about 135 electrical degrees around said axis.

Claim 10

An induction motor as claimed in claim 1 wherein: said auxiliary winding means are located within said stator so that the magnetic poles caused by current flow in said auxiliary winding means displaced from the magnetic poles created by current flowing through said stator coils in an amount of about 90 electrical degrees around said axis.

Claim 11

An induction motor as claimed in claim 1 wherein: the extremities of said conductors and said stator coil means are displaced from one another at one of the ends of said rotor and said stator in an amount of about 90 electrical degrees around said axis, the ends of said stator coil means at the ends of said stator are displaced around said axis so as to achieve said displacement of the extremities of said conductors and said stator coil means, said auxiliary winding means includes an auxiliary coil means, the ends of said auxiliary coil means being directly connected to one another so as to short out said auxiliary winding means and connect said auxiliary coil means in an endless series, said auxiliary winding means are located within said stator so that the magnetic poles caused by current flow in said auxiliary winding means are displaced from the magnetic poles created by curRent flowing through said stator coils in an amount of about 90 electrical degrees around said axis.

Claim 12

An induction motor as claimed in claim 1 wherein: the extremities of said conductors and said stator coil means are displaced from one another at one of the ends of said rotor and said stator in an amount of about 90 electrical degrees around said axis, the ends of said stator coil means at the ends of said stator are displaced around said axis so as to achieve said displacement of the extremities of said conductors and said stator coil means, said auxiliary winding means includes an auxiliary coil means, the ends of said auxiliary coil means being connected to one another through a capacitor, said auxiliary winding means are located within said stator so that the magnetic poles caused by current flow in said auxiliary winding means are displaced from the magnetic poles created by current flowing through said stator coils in an amount of about 90 electrical degrees around said axis.

Claim 13

An induction motor as claimed in claim 1 wherein: the extremities of said conductors and said stator coil means are displaced from one another at one of the ends of said rotor and said stator in an amount of about 90 electrical degrees around said axis, the ends of said stator coil means at the ends of said stator are displaced around said axis so as to achieve said displacement of the extremities of said conductors and said stator coil means, a second auxiliary winding means located within said stator and positioned with respect to said stator coil means so that the magnetic poles caused by current flow in said second auxiliary winding means are displaced from the magnetic poles created by current flowing through said stator coil means and are displaced from the magnetic poles created by current flowing through said stator coil means, and from the magnetic poles created by current flowing through said first-mentioned auxiliary winding means, and switch means for controlling current flow in both of said auxiliary winding means, said switch means being capable of connecting extremities of either of said auxiliary winding means so as to short out the same in an endless path when the extremities of the other of said auxiliary winding means are not connected so that no current will flow through the other of said auxiliary winding means, the direction of said rotor rotation being dependent upon which said auxiliary winding means has its extremities connected, said auxiliary winding means are located within said stator so that the magnetic poles caused by current flow in said auxiliary winding means are displaced from the magnetic poles created by current flowing through said stator coils in an amount of about 90 electrical degrees around said axis.

Claim 14

In an AC, single-phase induction electric motor having a stator and a rotor; said stator having stator coil means for creating a stator magnetic field, said stator coil means being adapted to be connected to an AC current source, said rotor being rotatably mounted with respect to said stator, having electrical conductors extending along the length thereof and means electrically connected the ends of said conductors, the improvement which comprises: said conductors and said stator coil means being located so that the magnetic poles caused by current flowing through said coil means and caused by induced currents in said conductors are physically displaced from one another about 90 electrical degrees at the opposite extremities of said stator and said rotor at the start of rotation of said rotor and, auxiliary winding means for creating a further magnetic field physically located at one of the extremities of said stator about 90 electrical degrees displaced from the poles of said stator coil means, said auxiliary winding means extending only part of the length of said stator coil means and said rotor, and being unconnecteD to said current source.

Claim 15

In an AC, single-phase induction electric motor having a stator and a rotor; said stator having stator coil means for creating a stator magnetic field, said stator coil means being adapted to be connected to an AC current source, said rotor being rotatably mounted with respect to said stator, having electrical conductors extending along the length thereof and means electrically connected the ends of said conductors, the improvement which comprises: said conductors and said stator coil means being located so that the magnetic poles caused by current flowing through said coil means and caused by induced currents in said conductors are physically displaced from one another about 90 electrical degrees at the opposite extremities of said stator and said rotor at the start of rotation of said rotor and, auxiliary winding means for creating a further magnetic field physically located at one of the extremities of said stator about 90 electrical degrees displaced from the poles of said stator coil means, said auxiliary winding means extending only part of the length of said stator coil means and said rotor, and being unconnecteD to said current source.

Claim 16

An electric motor as claimed in claim 13 wherein: said stator coil means consists of a plurality of stator coils connected in series, said auxiliary winding means comprises a plurality of auxiliary winding coils, each of said coils being located so as to extend between two of said stator coils, said coils being connected in an endless series.

Claim 17

An electric motor as claimed in claim 14 wherein: said displacement is accomplished by offsetting the ends of said stator coils so that an end of each stator coil is offset from the other end of the same coil by 90 electrical degrees.

Claim 18

An electric motor as claimed in claim 14 including: a second auxiliary winding means comprising a plurality of second auxiliary winding coils, each of said second auxiliary winding coils being located so as to extend between two of said stator coils, said second auxiliary winding coils being connected in an endless series and being located for creating still further magnetic fields at the other of said extremities of said stator about 90 electrical degrees displaced from the poles of said stator coil means, said auxiliary winding means being displaced in different directions from said stator coil means, a switch means located in series with each of said auxiliary winding means, said rotor normally rotating in one direction when one of said switch means is closed and the other is open and rotating in the other direction when the previously open switch means is closed and the previously closed switch means is open.

Claim 19

An electric motor as claimed in claim 14 including: a capacitor connected in series between the ends of said auxiliary winding means.