Regenerative electric motor

• US 4,237,410 A
• Filed: 10/23/1978
• Issued: 12/02/1980
• Est. Priority Date: 10/23/1978
• Status: Expired due to Term

• Current Assignee: Alfred C. Erickson, Clyde W. Erickson
• Original Assignee: Alfred C. Erickson, Clyde W. Erickson
• Inventors: Erickson, Clyde W., Erickson, Alfred C.
• Primary Examiner(s): Hickey, Robert J.
• Application Number:
  US05/953,795
• Time in Patent Office: 771 Days
• Field of Search: 320/14, 320/61, 318/248, 318/376, 318/377
• US Class Current: 320/126
• CPC Class Codes: B60L 2220/54 Windings for different functions
• CPC Class Codes: B60L 2240/427 Voltage
• CPC Class Codes: B60L 58/18 of two or more battery modules
• CPC Class Codes: B60L 58/21 having the same nominal voltage
• CPC Class Codes: H02J 7/1423 with multiple batteries
• CPC Class Codes: Y02T 10/64 Electric machine technologies in electromobility
• CPC Class Codes: Y02T 10/70 Energy storage systems for electromobility, e.g. batteries

Abstract

An improved electric motor for use in battery powered vehicles wherein the motor is adapted for production of a secondary voltage to sequentially charge batteries used as the power source for powering the vehicle, which motors are adapted to be carried aboard the vehicle and to cyclically function as a means to drive the wheels of the vehicle and then to recharge the batteries used as the power source to drive the motors in operative relationship.

Claims

1. An electric motor for converting electrical energy from a primary energy source into mechanical energy while simultaneously utilizing counter-electromotive force developed during motor operation to provide a secondary source of energy, said electric motor comprising:

(a) a stator structure including a stator field generating means for receiving current from the primary energy source and for generating a first electromagnetic field in response to the flow of current so received;

(b) a brush means connected to said stator field generating means for receiving current therefrom;

(c) an armature structure mounted for rotation relative to said stator structure, said armature structure including an armature field generating means energizible by a current flow to generate a second electromagnetic field which interacts with said first electromagnetic field to create a torque for rotating said armature structure relative to said stator structure, said armature structure further including a commutator means connected to said armature field generating means for electrically contacting said brush means to conduct a flow of current periodically from the primary energy source through said stator field generating means and said brush means to said armature field generating means such that said first and second electromagnetic fields are respectively generated by said stator field generating means and said armature field generating means to create said torque for rotating said armature structure relative to said stator structure, and;

(d) transformer means connected to said brush means for generating a counter-electromotive force in response to the periodic flow of current through said brush means and for converting the counter-electromotive force so generated to an output voltage.

2. An electric motor as set forth in claim 1, wherein said stator structure includes first and second stator sections and said stator field generating means includes a first field winding disposed on said first stator section and a second field winding disposed on said second stator section.

3. An electric motor as set forth in claim 1, wherein said armature field generating means includes a plurality of armature windings and said commutator means is divided into a corresponding plurality of paired, electrically-conductive segments respectively connected to said plurality of armature windings.

4. An electric motor for converting electrical energy from a primary energy source into mechanical energy while simultaneously utilizing the counter-electromotive force developed during motor operation to provide a secondary source of energy, said motor comprising:

(a) a stator structure including a stator field generating means for receiving current from the primary energy source and for generating a first electromagnetic field in response to the flow of current so received;

(b) a brush means connected to said stator field generating means for receiving current therefrom;

(c) an armature structure mounted for rotation relative to said stator structure, said armature structure including an armature field generating means energizible by a current flow to generate a second electromagnetic field which interacts with said first electromagnetic field to create a torque for rotating said armature structure relative to said stator structure, said armature structure further including a commutator means for electrically contacting said brush means to conduct a flow of current periodically from the primary energy source through said stator field generating means and said brush means to said armature field generating means such that said first and second electromagnetic fields are respectively generated by said stator field generating means and said armature field generating means to create said torque for rotating said armature structure relative to said stator structure, said commutator means having a plurality of electrically conductive segments positioned to provide said electrical contact with said brush means and connected to said armature field generating means to conduct said periodic flow of current thereto, said commutator means also having a plurality of electrically non-conductive segments respectively interposed between adjacent electrically conductive segments, and;

(d) transformer means connected to said brush means for generating a counter-electromotive force in response to the periodic flow of current through said brush means and for converting the counter-electromotive force so generated to an output voltage.

5. An electric motor as set forth in claim 4, wherein said brush means includes two pairs of brush elements positioned such that one pair of said brush elements is in contact with said electrically conductive segments of said commutator means whenever the other pair of said brush lements is in contact with said electrically non-conductive segments of said commutator means.

6. An electric motor as set forth in claim 4, wherein said stator structure includes a first stator section and a second stator section and said stator field generating means includes a first field winding disposed on said first stator section and a second field winding disposed on said second stator section.

7. An electric motor as set forth in claim 6, wherein a first brush element in each said pair of brush element is serially connected to said first field winding and a second brush element in each said pair of brush elements is serially connected to said second field winding

8. An electric motor as set forth in claim 7, wherein said transformer means includes first and second transformer units and said first field winding provides the primary winding for said first transformer unit while the second field winding provides the primary winding for said second transformer unit.

9. An electric motor as set forth in claim 8, wherein said first primary winding and said second primary winding are both center-tapped and said first brush elements are respectively connected in series to the opposite ends of said first field winding while said second brush elements are respectively connected in series to the opposite ends of said second field winding.

10. An electric motor as set forth in claim 8, wherein said pluralities of electrically conducting and non-conducting segments on said commutator means are radially arranged with respect to the axis of rotation of said armature structure to form a commutator ring of alternating conductive and non-conductive segments, and said first and second brush elements in each said pair of brush elements are positioned in diametrically opposed relationship about the periphery of said commutator ring.

11. An electric motor system for converting electrical energy from a first electrical energy source into mechanical energy while simultaneously utilizing counter-electromotive force developed during motor operation to charge a second electrical energy source, said electric motor system comprising

(a) a first source of electrical energy;

(b) a second source of electrical energy;

(c) a stator structure including a stator field generating means for receiving current from said first source of electrical energy and for generating a first electromagnetic field in response to the flow of current so received;

(d) a brush means connected to said stator field generating means for receiving current therefrom;

(e) an armature structure mounted for rotation relative to said stator structure, said armature structure including an armature field generating means energizible by a current flow to generate a second electromagnetic field which interacts with said first electromagnetic field to create a torque for rotating said armature structure relative to said stator structure, said armature structure further including a commutator means connected to said armature field generating means for electrically contacting said brush means to conduct a flow of current periodically from said first source of electrical energy through said stator field generating means and said brush means to said armature field generating means such that said first and second electromagnetic fields are respectively generated by said stator field generating means and said armature field generating means to create said torque for rotating said armature structure relative to said stator structure;

(f) transformer means connected to said brush means for generating a counter-electromotive force in response to the periodic flow of current through said brush means and for converting the counter-electromotive force so generated to an output voltage, and;

(g) a circuit means for conducting current from one of said first and second sources of electrical energy to said stator field generating means to cause said armature structure to rotate relative to said stator structure while simultaneously supplying said output voltage from said transformer means to the other of said first and second sources of electrical energy to effect a charging relationship between said transformer means and the other of said first and second sources of electrical energy.

12. An electric motor system as set forth in claim 11, wherein said circuit means includes a switching means for alternately conducting current from one of said first and second electrical source means while alternately supplying the other of said first and second sources of electrical energy with said output voltage.

13. An electric motor system as set forth in claim 12, wherein said first and second sources of electrical energy are direct current sources.

14. An electric motor system as set forth in claim 13, wherein said first and second sources of electrical energy are batteries.

15. An electric motor as set forth in claim 14, wherein said circuit means includes diode means connected between said transformer means and the alternately supplied other source of electrical energy.