ELECTRICALLY DRIVEN INDUSTRIAL VEHICLES

• US 3,865,209 A
• Filed: 07/02/1973
• Issued: 02/11/1975
• Est. Priority Date: 07/28/1972
• Status: Expired due to Term

• Current Assignee: Kouichi Kimura, Toru Aihara
• Original Assignee: Kouichi Kimura, Toru Aihara
• Inventors: Aihara, Toru, Kimura, Kouichi
• Primary Examiner(s): Reeves, Robert B.
• Assistant Examiner(s): Rolla, Joseph J.
• Application Number:
  US05/375,797
• Time in Patent Office: 589 Days
• Field of Search: 180/2,65R 310/83,129,160,166 321/64 318/11,12
• US Class Current: 180/65.1
• CPC Class Codes: B60K 1/00 Arrangement or mounting of electrical propulsion units B60K7/00 takes precedence; arrangement or mounting of plural diverse prime-movers for mutual or common propulsion B60K6/00; electric transmission arrangements B60K17/12; electric equipment or propulsion of electrically-propelled vehicles per se B60L; current-collectors for power supply lines of electrically-propelled vehicles B60L5/00
• CPC Class Codes: B60L 2200/40 Working vehicles
• CPC Class Codes: B60L 2220/12 Induction machines
• CPC Class Codes: B60L 50/10 using propulsion power supplied by engine-driven generators, e.g. generators driven by combustion engines
• CPC Class Codes: B60L 9/26 single-phase motors
• CPC Class Codes: F02B 3/06 with compression ignition compression ignition engines using air or gas for blowing fuel into compressed air in cylinder F02B13/02
• CPC Class Codes: Y02P 90/60 Electric or hybrid propulsion means for production processes
• CPC Class Codes: Y02T 10/70 Energy storage systems for electromobility, e.g. batteries
• CPC Class Codes: Y02T 10/7072 Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors

Abstract

An electrically driven vehicle employs an induction motor as a drive train motor with a gear matching transmission connecting it with the drive train of the vehicle so the transmission matches its rotational speed to be compatible with the drive train arrangements of a conventionally-driven diesel engine drive train at several different frequencies of its alternating power source, which is supplied through a cable connecting the vehicle to a suitable power source. In addition, the induction drive motor may be configured for four- or six-pole operation, whereby switching therebetween will provide a dual operating speed range for the motor at any single frequency of the power source, giving the machine additional flexibility.

Claims

1. In an alternating current electrically driven industrial vehicle compatible with both 50- and 60-cycle operations having a drive train and a vehicle transmission, an electric drive comprising:

an electrical induction motor having an output shaft mounted on said vehicle, said induction motor having at least two operable pole configurations;

a secondary transmission operably disposed between said output shaft and the vehicle transmission operable to connect said induction motor to said vehicle transmission at differing gear ratios compatible with both 50- and 60-cycle operation of said induction motor whereby the input to said vehicle transmission will be the same at both 50- and 60-cycle operation of said induction motor;

switching means connected to said induction motor and operable to connect alternate pole configurations of said motor to an alternating power source; and

means connecting said switching means to an alternating electrical power source whereby the speed of the vehicle can be varied both by said vehicle transmission and by selection of at least two different pole configurations of said induction motor, thereby more efficiently adapting the vehicle capability to its working requirements.

2. The electric drive defined in claim 1 wherein the electrical induction motor has a four- and a six-pole configuration.