Small engine vehicle including a generator

• US 6,617,725 B2
• Filed: 08/26/2002
• Issued: 09/09/2003
• Est. Priority Date: 04/16/2001
• Status: Expired due to Fees

• Current Assignee: Briggs & Stratton Corporation
• Original Assignee: Briggs & Stratton Corporation
• Inventors: Rose, Robert E. Sr.
• Primary Examiner(s): LE, DANG D
• Application Number:
  US10/227,681
• Publication Number:
  US 20030034712A1
• Time in Patent Office: 379 Days
• Field of Search: 310/71, 310/74, 310/69, 310/70.R, 310/152, 310/153, 310/179-185, 310/188-190, 310/198, 310/200, 310/202-210, 123/149.D, 123/149.R, 123/601
• US Class Current: 310/74
• CPC Class Codes: B60K 6/26 characterised by the motors or the generators
• CPC Class Codes: B60K 6/485 Motor-assist type
• CPC Class Codes: B60L 2200/22 Microcars, e.g. golf cars
• CPC Class Codes: B60L 2260/12 of combustion engines
• CPC Class Codes: B60L 50/30 using propulsion power stored mechanically, e.g. in fly-wheels
• CPC Class Codes: B60W 10/08 including control of electric propulsion units, e.g. motors or generators
• CPC Class Codes: F02B 63/04 for electric generators
• CPC Class Codes: H02K 7/1807 Rotary generators H02K7/006 takes precedence
• CPC Class Codes: H02K 7/1815 structurally associated with reciprocating piston engines general aspects of generating sets, e.g. housing, F02B63/04
• CPC Class Codes: Y02T 10/62 Hybrid vehicles
• 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
• CPC Class Codes: Y10S 903/906 Motor or generator

Abstract

A small-engine vehicle including a plurality of wheels, an internal combustion engine having a drive shaft interconnected to drive at least one of the wheels, and a generator. The generator includes a stator having a core disposed next to the engine and a winding disposed on the core. The generator further includes a flywheel-rotor apparatus surrounding at least a portion of the stator and having an aperture that receives the drive shaft. The flywheel-rotor apparatus is operable to magnetically interact with the stator to produce a first high-voltage, alternating-current signal in the winding, and to provide an inertia to the internal combustion engine. The generator further includes power circuitry electrically connected to the winding. The power circuitry receives the high-voltage, alternating-current signal and controllably generates a second high-voltage, alternating-current signal.

Claims

1. A generator comprising:

an engine having a shaft;

a rotor interconnected with the shaft;

a stator including

a core having a plurality of teeth that receive wire, the teeth being numbered consecutively from (1) to (x),

a first wire disposed on the core to form a first group of coils, the first group of coils forming at least two poles numbered consecutively from (1) to (x−

n) with each pole being formed on a respective tooth, the first wire including first and second ends that exit the core between two adjacent teeth receiving the first group of coils, and

a second wire disposed on the core to form a second group of coils, the second group of coils forming at least two poles numbered consecutively from (x−

n+1) to (x) with each pole being formed on a respective tooth, the second wire having third and fourth ends that exit the core between two adjacent teeth receiving the second group of coils; and

wherein (x) and (n) are integers and (x) is greater than (n).

2. A generator as set forth in claim 1 wherein the coils forming the odd numbered poles of the first group are wound in a first direction, and wherein the coils forming the even numbered poles of the first group are wound in a second direction different than the first direction.

3. A generator as set forth in claim 2 wherein the coils forming the odd numbered poles of the second group are wound in the first direction and the coils forming the even numbered poles of the second group are wound in the second direction.

4. A generator as set forth in claim 2 wherein the coils forming the odd numbered poles of the second group are wound in the second direction and the coils forming the even numbered poles of the second group are wound in the first direction.

5. A generator as set forth in claim 1 wherein (x) is 18 and (n) is 2.

6. A generator as set forth in claim 1 wherein (x) is 16 and (n) is 2.

7. A generator as set forth in claim 1 wherein the first and second ends exit the core between the first and second teeth.

8. A generator as set forth in claim 7 wherein the third and fourth ends exit the core between the (x−

1) and (x) teeth.

9. A generator as set forth in claim 1 wherein the rotor magnetically interacts with the stator to generate a first voltage in the first wire and to generate a second voltage in the second wire, and wherein the first voltage is greater than the second voltage.

10. A generator as set forth in claim 9 wherein the first voltage is greater than approximately two hundred volts peak-to-peak, and wherein the second voltage is less than approximately fifty volts peak-to-peak.