# US 5,350,031 A · Plural generator apparatus for an electric hybrid automobile

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- Number: US 5,350,031 A
- Document ID: US5350031A
- Status: Granted
- Kind: A
- Application number: 08/079,923
- Filed: 1993-06-23
- Granted: 1994-09-27
- Earliest claimed: 1992-07-07
- Assignees: Mitsubishi Denki Kabushiki Kaisha
- Inventors: Takeshi Sugiyama; Yutaka Kitamura
- Web page: https://patentgrep.com/patent/US5350031A

## CPC

- B60K 6/28: characterised by the electric energy storing means, e.g. batteries or capacitors
- B60K 6/46: Series type
- B60K 6/48: Parallel type
- B60L 50/10: using propulsion power supplied by engine-driven generators, e.g. generators driven by combustion engines
- B60L 50/61: by batteries charged by engine-driven generators, e.g. series hybrid electric vehicles
- B60W 10/08: including control of electric propulsion units, e.g. motors or generators
- H02J 7/1415: {with a generator driven by a prime mover other than the motor of a vehicle}
- B60K 2006/4833: {Step up or reduction gearing driving generator, e.g. to operate generator in most efficient speed range}
- B60L 2220/12: Induction machines
- Y02T 10/62: Hybrid vehicles
- Y02T 10/70: Energy storage systems for electromobility, e.g. batteries
- Y02T 10/7072: Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
- Y02T 10/72: Electric energy management in electromobility
- Y10S 903/903: having energy storing means, e.g. battery, capacitor
- Y10S 903/907: Electricity storage, e.g. battery, capacitor
- B60K: ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60L: PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES (arrangements or mounting of electrical propulsion units or of plural diverse prime-movers for mutual or common propulsion in vehicles B60K1/00, B60K6/20; arrangements or mounting of electrical gearing in vehicles B60K17/12, B60K17/14; preventing wheel slip by reducing power in rail vehicles B61C15/08; dynamo-electric machines H02K; control or regulation of electric motors H02P); SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES (electric coupling devices combined with mechanical couplings of vehicles B60D1/64; electric heating for vehicles B60H1/00); ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL (control or regulation of electric motors H02P); MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60W: CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- H02J: ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- Y02T: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y10S: TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS

## Abstract

A power generation apparatus for an electric hybrid automobile. Two a.c. generators 21, 22 which have different rotation speeds at the initiation of power generation and which provide high efficiency at or near the different rotation speeds are driven by an internal combustion engine 1 via a belt 23. An a.c. power is supplied to a rectifier 4, and the power is used as a power source for an induction motor 7 and a battery 5.

## Claims

### Claim 1

A power generation apparatus for an electric hybrid automobile, said power generation apparatus comprising:
a) a plurality of a.c. generators commonly driven in parallel by an internal combustion engine (1) through a rotation transmitting means (23),
b) a rectifier (4) for rectifying a.c. output voltages of the a.c. generators,
c) a battery (5) charged with an output from the rectifier,
d) a control device (6) supplied with a d.c. voltage from the rectifier of the battery, for converting the d.c. voltage into a variable frequency a.c. voltage by means of a stationary inverter, and
e) an induction motor (7) supplied with a.c. power by the control device for driving an automobile,
f) one of the a.c. generators having a relatively low rotation speed at the initiation of power generation, and another one of the a.c. generators having a relatively high rotation speed at the initiation of power generation.

### Claim 2 (depends on 1)

The power generation apparatus according to claim 1, wherein two a.c. generators are used, and a control voltage applied to the a.c. generator having a relatively low rotation speed at the initiation of power generation is lower than a control voltage applied to the a.c. generator having a relatively high rotation speed at the initiation of power generation.