Direct current motors

Claim 2

A separately excited two pole direct current motor system comprising, stationary field windings with first and second terminals, rotating armature, armature windings, commutators and associated stationary brushes, slip rings and associated stationary brushes, a full wave bridge rectifier, said armature windings comprising a three phase winding with first second and third terminals, said commutators comprising first second and third commutator rings and associated first and second sets of stationary commutator brushes, said three commutator rings being mechanically identical each having an electrically conductive segment not exceeding 120* of the commutator ring surface and the rest of the surface being non-conductive, each said conductive segment of said three commutator rings being displaced symmetrically by 120* with respect to the other two segments whereby leading one and lagging the other segment, each said first and second set of commutator brushes comprising a first second and third brushes each said brush resting against a corresponding one of said first second and third commutator rings, said first and second sets of commutator brushes being on diametrically opposite sides of the said commutators and being electrically connected to the positive and negative terminals respectively of a variable dc voltage provided by a fixed voltage source through a voltage controller, said slip rings comprising of first second and third electrically conductive rings and associated first second and third stationary slip ring brushes resting against the corresponding rings, said first second and third end terminals of said armature winding connected respectively to said first second and third commutator segments such that each said winding terminal is electrically conductive with a conducting segment of one of the corresponding said commutator rings, also said first second and third end terminal of said armature winding connected respectively to said first second and third slip rings such that each winding terminal is electrically conductive with one of said three slip rings, said full wave bridge rectifier comprising three pairs of first and second diodes, the anode-cathode junction of each pair of said three pairs of first and second diodes being electrically connected to one of the said three slip ring brushes, the cathode ends of all said three pairs of first and second diodes connected together by a first conductor, the anode ends of all said three pairs of first and second diode connected together by a second conductor, said first conductor connected to the positive terminal of said variable dc voltage source, said second conductor connected to the negative terminal of said variable dc voltage source, said stationary field winding energized separately from said dc voltage source through a field controller.

Claim 3

A direct current series two pole motor system comprising, field windings with first and second terminals, field diode, rotating armature, armature windings, commutators and associateD stationary brushes, slip rings and associated stationary brushes, a full wave bridge rectifier, said armature windings comprising a three phase winding with first second and third terminals, said commutators comprising first second and third commutator rings and associated first and second sets of stationary commutator brushes, said three commutator rings being mechanically identical each having an electrically conductive segment not exceeding 120* of the commutator ring surface and the rest of the surface being non-conductive, each said conductive segment of said three commutator rings being displaced symmetrically by 120* with respect to the other two segments whereby leading one and lagging the other segment, each said first and second set of commutator brushes comprising a first second and third brushes each said brushes resting against a corresponding one of said first second and third commutator rings, said first and second sets of commutator brushes being on diametrically opposite sides of the said commutators and being electrically connected in series with said field winding to positive and negative terminals of a variable dc voltage source provided by a fixed voltage source through a voltage controller, said positive terminal connected to first terminal of said field winding, second terminal of said field winding connected to said first set of commutator brushes, said second set of commutator brush connected to negative terminal of said variable dc voltage source, said slip rings comprising of first second and third electrically conductive rings and associated first second and third stationary slip ring brushes resting against the corresponding rings, said first second and third end terminals of said armature winding connected respectively to said first second and third commutator segments such that each said winding terminal is electrically conductive with a conducting segment of one of the corresponding said commutator rings, also said first second and third end terminal of said armature winding connected respectively to said first second and third slip rings such that each winding terminal is electrically conductive with one of said three slip rings, said full wave bridge rectifier comprising three pairs of first and second diodes, the anode-cathode junction of each pair of said three pairs of first and second diodes being electrically connected to one of the said three slip ring brushes, the cathode ends of all said three pairs of first and second diodes connected together by a first conductor, the anode ends of all said three pairs of first and second diode connected together by a second conductor, said first conductor connected to the positive terminal of said variable dc voltage source, said second conductor connected to the negative terminal of said variable dc voltage source, cathode and anode of said field diode connected across first and second terminals respectively of said field winding.

Claim 4

A direct current series two pole motor system comprising, field windings with first and second terminals, field diode, rotating armature, armature windings, commutators and associateD stationary brushes, slip rings and associated stationary brushes, a full wave bridge rectifier, said armature windings comprising a three phase winding with first second and third terminals, said commutators comprising first second and third commutator rings and associated first and second sets of stationary commutator brushes, said three commutator rings being mechanically identical each having an electrically conductive segment not exceeding 120* of the commutator ring surface and the rest of the surface being non-conductive, each said conductive segment of said three commutator rings being displaced symmetrically by 120* with respect to the other two segments whereby leading one and lagging the other segment, each said first and second set of commutator brushes comprising a first second and third brushes each said brushes resting against a corresponding one of said first second and third commutator rings, said first and second sets of commutator brushes being on diametrically opposite sides of the said commutators and being electrically connected in series with said field winding to positive and negative terminals of a variable dc voltage source provided by a fixed voltage source through a voltage controller, said positive terminal connected to first terminal of said field winding, second terminal of said field winding connected to said first set of commutator brushes, said second set of commutator brush connected to negative terminal of said variable dc voltage source, said slip rings comprising of first second and third electrically conductive rings and associated first second and third stationary slip ring brushes resting against the corresponding rings, said first second and third end terminals of said armature winding connected respectively to said first second and third commutator segments such that each said winding terminal is electrically conductive with a conducting segment of one of the corresponding said commutator rings, also said first second and third end terminal of said armature winding connected respectively to said first second and third slip rings such that each winding terminal is electrically conductive with one of said three slip rings, said full wave bridge rectifier comprising three pairs of first and second diodes, the anode-cathode junction of each pair of said three pairs of first and second diodes being electrically connected to one of the said three slip ring brushes, the cathode ends of all said three pairs of first and second diodes connected together by a first conductor, the anode ends of all said three pairs of first and second diode connected together by a second conductor, said first conductor connected to the positive terminal of said variable dc voltage source, said second conductor connected to the negative terminal of said variable dc voltage source, cathode and anode of said field diode connected across first and second terminals respectively of said field winding.

Claim 5

A permanent magnet field, two pole direct current motor system comprising, permanent magnets to provide the field flux, rotating armature, armature winding, commutators and associated stationary brushes, slip rings and associated stationary brushes, a full wave bridge rectifier, said armature windings comprising a three phase winding with first second and third terminals, said commutators comprising first second and third commutator rings and associated first and second sets of stationary commutator brushes, said three commutator rings being mechanically identical each having an electrically conductive segment not exceeding 120* of the commutator ring surface and the rest of the surface being non-conductive, each said conductive segment of said three commutator rings being displaced symmetrically by 120* with respect to the other two segments whereby leading one and lagging the other segment, each said first and second set of commutator brushes comprising a first second and third brushes, each said brush resting against a corResponding one of said first second and third commutator rings, said first and second sets of commutator brushes being on diametrically opposite sides of the said commutators and being electrically connected to the positive and negative terminals respectively of a variable dc voltage provided by a fixed voltage source through a voltage controller, said slip rings comprising first second and third electrically conductive rings and associated first second and third stationary slip ring brushes resting against the corresponding rings, said first second and third end terminals of said armature winding connected respectively to said first second and third commutator segments such that each said winding terminal is electrically conductive with a conducting segment of one of the corresponding said commutator rings, also said first second and third end terminals of said armature winding connected respectively to said first second and third slip rings such that each winding terminal is electrically conductive with one of the said three slip rings, said full wave bridge rectifier comprising three pairs of first and second diodes, the anode-cathode junction of each pair of said three pairs of first and second diodes being electrically connected to one said three slip ring brushes, the cathode ends of all said three pairs of first and second diodes connected together by a first conductor, the anode ends of all said three pairs of first and second diode connected together by a second conductor, said first conductor connected to the positive terminal of said variable dc voltage source, said second conductor connected to the negative terminal of said variable dc voltage source.

Claim 6

A permanent magnet field, two pole direct current motor system comprising, permanent magnets to provide the field flux, rotating armature, armature winding, commutators and associated stationary brushes, slip rings and associated stationary brushes, a full wave bridge rectifier, said armature windings comprising a three phase winding with first second and third terminals, said commutators comprising first second and third commutator rings and associated first and second sets of stationary commutator brushes, said three commutator rings being mechanically identical each having an electrically conductive segment not exceeding 120* of the commutator ring surface and the rest of the surface being non-conductive, each said conductive segment of said three commutator rings being displaced symmetrically by 120* with respect to the other two segments whereby leading one and lagging the other segment, each said first and second set of commutator brushes comprising a first second and third brushes, each said brush resting against a corResponding one of said first second and third commutator rings, said first and second sets of commutator brushes being on diametrically opposite sides of the said commutators and being electrically connected to the positive and negative terminals respectively of a variable dc voltage provided by a fixed voltage source through a voltage controller, said slip rings comprising first second and third electrically conductive rings and associated first second and third stationary slip ring brushes resting against the corresponding rings, said first second and third end terminals of said armature winding connected respectively to said first second and third commutator segments such that each said winding terminal is electrically conductive with a conducting segment of one of the corresponding said commutator rings, also said first second and third end terminals of said armature winding connected respectively to said first second and third slip rings such that each winding terminal is electrically conductive with one of the said three slip rings, said full wave bridge rectifier comprising three pairs of first and second diodes, the anode-cathode junction of each pair of said three pairs of first and second diodes being electrically connected to one said three slip ring brushes, the cathode ends of all said three pairs of first and second diodes connected together by a first conductor, the anode ends of all said three pairs of first and second diode connected together by a second conductor, said first conductor connected to the positive terminal of said variable dc voltage source, said second conductor connected to the negative terminal of said variable dc voltage source.

Claim 7

The motor system according to claim 1, where additional means are provided for continuous shifting of all said commutator brushes as a total unit to either sides of nominal design axis in order to optimize motor efficiency and performance.

Claim 8

A permanent magnet field, two pole direct current motor system comprising, rotating permanent magnets to provide the field flux, stationary armature winding, commutators and associated stationary brushes, slip rings and associated stationary brushes, a full wave bridge rectifier, said stationary armature windings comprising a three phase winding with first second and third terminals, said commutators comprising first second and third rotating commutator rings and associated first and second sets of stationary commutator brushes, said three commutator rings being mechanically identical each having an electrically conductive segment not exceeding 120* of the commutator ring surface and the rest of the surface being non-conductive, each said conductive segment of said three commutator rings being displaced symmetrically by 120* with respect to the other two segments whereby leading one and lagging the other segment, each said first and second set of commutator brush comprising first second and third brushes each said brush resting against a corresponding one of said first second and third commutator rings, said first and second sets of commutator brushes being on diametrically opposite sides of the said commutators and being electrically connected to the positive and negative terminals respectively of a variable dc voltage provided by a fixed voltage source through a voltage controller, said slip rings comprising of first second and third electrically conductive rotating rings and associated first second and third stationary slip ring brushes resting against the corresponding rings, said first second and third conductive rings of of said slip rings connected respectively to said first second and third commutator segments such that each said ring is electrically conductive with conducting segment of one of the corresponding said commutator rings, said first second and third end terminal of said armature winding connected respectively to said first second and third slip ring brushes such that each winding terminal is electrically conductive with one of said tHree slip rings, said full wave bridge rectifier comprising three pairs of first and second diodes, the anode-cathode junction of each pair of said three pairs of first and second diodes being electrically connected to one of the said three slip ring brushes thus making the anode and cathode of said diode pair also electrically conductive with one corresponding three end terminals of the said stationary armature winding, the cathode ends of all said three pairs of first and second diodes connected together by a first conductor, the anode ends of all said three pairs of first and second diode connected together by a second conductor, said first conductor connected to the positive terminal of said variable dc voltage source, said second conductor connected to the negative terminal of said variable dc voltage source.

Claim 9

A permanent magnet field, two pole direct current motor system comprising, rotating permanent magnets to provide the field flux, stationary armature winding, commutators and associated stationary brushes, slip rings and associated stationary brushes, a full wave bridge rectifier, said stationary armature windings comprising a three phase winding with first second and third terminals, said commutators comprising first second and third rotating commutator rings and associated first and second sets of stationary commutator brushes, said three commutator rings being mechanically identical each having an electrically conductive segment not exceeding 120* of the commutator ring surface and the rest of the surface being non-conductive, each said conductive segment of said three commutator rings being displaced symmetrically by 120* with respect to the other two segments whereby leading one and lagging the other segment, each said first and second set of commutator brush comprising first second and third brushes each said brush resting against a corresponding one of said first second and third commutator rings, said first and second sets of commutator brushes being on diametrically opposite sides of the said commutators and being electrically connected to the positive and negative terminals respectively of a variable dc voltage provided by a fixed voltage source through a voltage controller, said slip rings comprising of first second and third electrically conductive rotating rings and associated first second and third stationary slip ring brushes resting against the corresponding rings, said first second and third conductive rings of of said slip rings connected respectively to said first second and third commutator segments such that each said ring is electrically conductive with conducting segment of one of the corresponding said commutator rings, said first second and third end terminal of said armature winding connected respectively to said first second and third slip ring brushes such that each winding terminal is electrically conductive with one of said tHree slip rings, said full wave bridge rectifier comprising three pairs of first and second diodes, the anode-cathode junction of each pair of said three pairs of first and second diodes being electrically connected to one of the said three slip ring brushes thus making the anode and cathode of said diode pair also electrically conductive with one corresponding three end terminals of the said stationary armature winding, the cathode ends of all said three pairs of first and second diodes connected together by a first conductor, the anode ends of all said three pairs of first and second diode connected together by a second conductor, said first conductor connected to the positive terminal of said variable dc voltage source, said second conductor connected to the negative terminal of said variable dc voltage source.