Multi-phase motor

Claim 2

A polyphase electric motor comprising: a stator including a core of magnetic material; a rotor; a main polyphase stator winding wound on said core and encompassing said magnetic material, said winding comprising a plurality of coils, each coil representing a single phase; a plurality of input terminals adapted to be connected to a source of polyphase AC voltage; a plurality of capacitors; means connecting each of said coils in a series circuit with one of said capacitors and said series circuits being connected with said input terminals; each of said capacitors being capable of being charged to a voltage sufficient, when added to said AC voltage, to develop a volt-second value across the magnetic material of said stator core greater than the volt-second capacity of said magnetic material so that said magnetic material will periodically be driven into saturation in opposite directions upon changes in polarity of the phases of said polyphase AC voltage; and means for introducing a control flux into said magnetic material to vary the amount of magnetic material effectively encompassed by said main stator winding.

Claim 3

The motor of claim 1 wherein said means for introducing a control flux comprises a control winding wound an said stator core encompassing said magnetic material and means for supplying a control current to said control winding.

Claim 4

The motor of claim 2 in which switch means are provided in shunt with each of said capacitors.

Claim 5

The motor of claim 3 in which said switch means are centrifugally operated and are closed at starting.

Claim 6

The motor of claim 2 in which said coils and their associated capacitors are connected in a wye configuration.

Claim 7

The motor of claim 2 in which said coils and their associated capacitors are connected in a delta configuration.

Claim 8

The motor of claim 2 in which at least one auxiliary winding is wound on said core to encompass said magnetic material and connected to a pair of said input terminals.

Claim 9

The motor of claim 2 in which said coils and their associated capacitors are connected to said input terminals in a wye configuration, and in which a plurality of auxiliary windings are wound on said core to encompass said magnetic material, each of said auxiliary windings being connected in parallel with one of said series circuits.

Claim 10

The motor of claim 2 in which said coils and their associated capacitors are connected to said input terminals in a delta configuration, and in which a plurality of auxiliary windings are wound on said core to encompass said magnetic material, each of said auxiliary windings being connected in parallel with one of said series circuits.

Claim 11

The motor of claim 2 in which a plurality of auxiliary windings are wound on said core to encompass said magnetic material, said coils and their associated capacitors being connected to said input terminals in a wye configuration and said auxiliary windings being connected to said input terminals in a selta configuration.

Claim 12

The motor of claim 2 in which a plurality of auxiliary windings are wound on said core to encompass said magnetic material, said coils and their associated capacitors being connected to said input terminals in a delta configuration and said auxiliary windings being connected to said input terminals in a wye configuration.

Claim 13

A polyphase electric motor comprising: a stator including a core of magnetic material; a rotor, and an air gap between the stator and rotor; a main polyphase stator winding wound on said core and encompassing said magnetic material such that the flux path of the main winding includes the air gap and links the rotor, said winding comprising a plurality of coils, each coil representing a single phase; a plurality of input terminals adapted to be connected to a source of polyphase AC voltage; a plurality of capacitors; means connecting each of said coils in a series circuit with one of said capacitors and said series circuits being connected with said input terminals, and means for introducing a control flux into said magnetic material to vary the amount of magnetic material effectively encompassed by said main stator winding without substantially generating control flux in said air gap or linking the rotor.

Claim 14

A polyphase electric motor comprising: a stator including a core of magnetic material; a rotor, and an air gap between the stator and rotor; a main polyphase stator winding wound on said core and encompassing said magnetic material such that the flux path of the main winding includes the air gap and links the rotor, said winding comprising a plurality of coils, each coil representing a single phase; a plurality of input terminals adapted to be connected to a source of polyphase AC voltage; a plurality of capacitors; means connecting each of said coils in a series circuit with one of said capacitors and said series circuits being connected with said input terminals, and means for introducing a control flux into said magnetic material to vary the amount of magnetic material effectively encompassed by said main stator winding without substantially generating control flux in said air gap or linking the rotor.

Claim 15

The motor of claim 12 wherein said means for introducing a control flux comprises a control winding wound on said stator core encompassing said magnetic material such that the flux path of the control winding does not substantially include the air gap or link the rotor, and means for supplying a control current to said control winding.

Claim 16

The motor of claim 13 in which switch means are provided in shunt with each of said capacitors.

Claim 17

The motor of claim 14 in which said switch means are centrifugally operated and are closed at starting.

Claim 18

The motor of claim 13 in which said coils and their associated capacitors are connected in a wye configuration.

Claim 19

The motor of claim 13 in which said coils and their associated capacitors are connected in a delta configuration.

Claim 20

The motor of claim 13 in which at least one auxiliary winding is wound on said core to encompass said magnetic material and connected to a pair of said input terminals.

Claim 21

The motor of claim 13 in which said coils and their associated capacitors are connected to said input terminals in a wye configuration, and in which a plurality of auxiliary windings are wound on said core to encompass said magnetic material, each of said auxiliary windings being connected in parallel with one of said series circuits.

Claim 22

The motor of claim 13 in which said coils and their associated capacitors are connected to said input terminals in a delta configuration, and in which a plurality of auxiliary windings are wound on said core to encompass said magnetic material, each of said auxiliary windings being connected in parallel with one of said series circuits.

Claim 23

The motor of claim 13 in which a plurality of auxiliary windings are wound on said core to encompass said magnetic material, said coils and their associated capacitors being connected to said input terminals in a wye configuration and said auxiliary windings being connected to said input terminals in a delta configuration.

Claim 24

The motor of claim 13 in which a plurality of auxiliary windings are wound on said core to encompass said magnetic material, said coils and their associated capacitors being connected to said input terminals in a delta configuration and said auxiliary windings being connected to said input terminals in a wye configuration.

Claim 25

A polyphase electric motor comprising: a stator including a core of magnetic material; a rotor, and an air gap between the stator and rotor; a main polyphase stator winding wound on said core and encompassing said magnetic material such that the flux path of the main winding includes the air gap and links the rotor, said winding comprising a plurality of coils, each coil representing a single phase; a plurality of input terminals adapted to be connected to a source of polyphase AC voltage; a plurality of capacitors; means connecting eachh of said coils in a series circuit with one of said capacitors, and said series circuits being connected in a wye configuration with said input terminals, and said capacitors being capable of being charged so that the stator core will periodically change nonlinearly from a nonsaturated to a saturated condition; means for introducing a control flux into said magnetic material to vary the amount of magnetic material effectively encompassed by said main stator winding without substantially generating control flux in said air gap or linking the rotor; and an auxiliary polyphase auxiliary winding comprising a plurality of coils with each coil representing a single phase, said coils of the auxiliary winding being connected in a wye configuration with said input terminals.

Claim 26

A polyphase electric motor comprising: a stator including a core of magnetic material; a rotor, and an air gap between the stator and rotor; a main polyphase stator winding wound on said core and encompassing said magnetic material such that the flux path of the main winding includes the air gap and links the rotor, said winding comprising a plurality of coils, each coil representing a single phase; a plurality of input terminals adapted to be connected to a source of polyphase AC voltage; a plurality of capacitors; means connecting eachh of said coils in a series circuit with one of said capacitors, and said series circuits being connected in a wye configuration with said input terminals, and said capacitors being capable of being charged so that the stator core will periodically change nonlinearly from a nonsaturated to a saturated condition; means for introducing a control flux into said magnetic material to vary the amount of magnetic material effectively encompassed by said main stator winding without substantially generating control flux in said air gap or linking the rotor; and an auxiliary polyphase auxiliary winding comprising a plurality of coils with each coil representing a single phase, said coils of the auxiliary winding being connected in a wye configuration with said input terminals.

Claim 27

A polyphase electric motor comprising: a stator including a core of magnetic material; a rotor, and an air gap between the stator and rotor; a main polyphase stator winding wound on said core and encompassing said magnetic material such that the flux path of the main winding includes the air gap and links the rotor, said winding comprising a plurality of coils, each coil representing a single phase; a plurality of input terminals adapted to be connected to a source of polyphase AC voltage; a plurality of capacitors; means connecting each of said coils in a series circuit with one of said capacitors, and said series circuits being connected in a delta configuration with said input terminals, and said capacitors being capable of being charged so that the stator core will periodically change nonlinearly from a nonsaturated to a saturated condition; means for introducing a control flux into said magnetic material to vary the amount of magnetic material effectively encompassed by said main stator winding without substantially generating control flux in said air gap or linking the rotor; and an auxiliary polyphase auxiliary winding comprising a plurality of coils with each coil representing a single phase, said coils of the auxiliary winding being connected in a delta configuration with said input terminals.

Claim 28

A polyphase electric motor comprising: a stator including a core of magnetic material; a rotor, and an air gap between the stator and rotor; a main polyphase stator winding wound on said core and encompassing said magnetic material such that the flux path of the main winding includes the air gap and links the rotor, said winding comprising a plurality of coils, each coil representing a single phase; a plurality of input terminals adapted to be connected to a source of polyphase AC voltage; a plurality of capacitors; means connecting each of said coils in a series circuit with one of said capacitors, and said series circuits being connected in a delta configuration with said input terminals, and said capacitors being capable of being charged so that the stator core will periodically change nonlinearly from a nonsaturated to a saturated condition; means for introducing a control flux into said magnetic material to vary the amount of magnetic material effectively encompassed by said main stator winding without substantially generating control flux in said air gap or linking the rotor; and an auxiliary polyphase auxiliary winding comprising a plurality of coils with each coil representing a single phase, said coils of the auxiliary winding being connected in a delta configuration with said input terminals.

Claim 29

A polyphase electric motor comprising: a stator including a core of magnetic material; a rotor, and an air gap between the stator and rotor; a main polyphase stator winding wound on said core and encompassing said magnetic material such that the flux path of the main winding includes the air gap and links the rotor, said winding comprising a plurality of coils, each coil representing a single phase; a plurality of input terminals adapted to be connected to a source of polyphase AC voltage; a plurality of capacitors; means connecting each of said coils in a series circuit with one of said capacitors, and said series circuits being connected in a delta configuration with said input terminals; means for introducing a control flux into said magnetic material to vary the amount of magnetic material effectively encompassed by said main stator winding without substantially generating control flux in said air gap or linking the rotor; and an auxiliary polyphase auxiliary winding comprising a plurality of coils with each coil representing a single phase, said coils of the auxiliary winding being connected in a wye configuration with said input terminals.

Claim 30

A polyphase electric motor comprising: a stator including a core of magnetic material; a rotor, and an air gap between the stator and rotor; a main polyphase stator winding wound on said core and encompassing said magnetic material such that the flux path of the main winding includes the air gap and links the rotor, said winding comprising a plurality of coils, each coil representing a single phase; a plurality of input terminals adapted to be connected to a source of polyphase AC voltage; a plurality of capacitors; means connecting each of said coils in a series circuit with one of said capacitors, and said series circuits being connected in a delta configuration with said input terminals; means for introducing a control flux into said magnetic material to vary the amount of magnetic material effectively encompassed by said main stator winding without substantially generating control flux in said air gap or linking the rotor; and an auxiliary polyphase auxiliary winding comprising a plurality of coils with each coil representing a single phase, said coils of the auxiliary winding being connected in a wye configuration with said input terminals.

Claim 31

An electric motor as in claim 25 wherein each of said capacitors is capable of being charged so that the stator core will periodically change nonlinearly from a nonsaturated to a saturated condition.

Claim 32

A polyphase electric motor comprising: a stator including a core of magnetic material; a rotor, and an air gap between the stator and rotor; a main polyphase stator winding wound on said core and encompassing said magnetic material such that the flux path of the main winding includes the air gap and links the rotor, said winding comprising a plurality of coils, each coil representing a single phase; a plurality of input terminals adapted to be connected to a source of polyphase AC voltage; a plurality of capacitors; means connecting each of said coils in a series circuit with one of said capacitors, and said series circuits being connected in a wye configuration with said input terminals; means for introducing a control flux into said magnetic material to vary the amount of magnetic material effectively encompassed by said main stator winding without substantially generating control flux in said air gap or linking the rotor; and an auxiliary polyphase auxiliary winding comprising a plurality of coils with each coil representing a single phase, said coils of the auxiliary winding being connected in a delta configuration with said input terminals.

Claim 33

A polyphase electric motor comprising: a stator including a core of magnetic material; a rotor, and an air gap between the stator and rotor; a main polyphase stator winding wound on said core and encompassing said magnetic material such that the flux path of the main winding includes the air gap and links the rotor, said winding comprising a plurality of coils, each coil representing a single phase; a plurality of input terminals adapted to be connected to a source of polyphase AC voltage; a plurality of capacitors; means connecting each of said coils in a series circuit with one of said capacitors, and said series circuits being connected in a wye configuration with said input terminals; means for introducing a control flux into said magnetic material to vary the amount of magnetic material effectively encompassed by said main stator winding without substantially generating control flux in said air gap or linking the rotor; and an auxiliary polyphase auxiliary winding comprising a plurality of coils with each coil representing a single phase, said coils of the auxiliary winding being connected in a delta configuration with said input terminals.

Claim 34

An electric motor as in claim 27 wherein each of said capacitors is capable of being charged so that the stator core will periodically change nonlinearly from a nonsaturated to a saturated condition.