Power transmission apparatus

• US 9,490,687 B2
• Filed: 04/29/2014
• Issued: 11/08/2016
• Est. Priority Date: 08/27/2007
• Status: Expired due to Fees

• Current Assignee: Kabushiki Kaisha Toyota Chuo Kenkyusho (Toyota Motor Corporation), Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Original Assignee: Kabushiki Kaisha Toyota Chuo Kenkyusho (Toyota Motor Corporation), Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Inventors: Watanabe, Takao, Tsuchiya, Eiji, Nishizawa, Hiroyuki, Kitahata, Takeshi
• Primary Examiner(s): MULLINS, BURTON S
• Application Number:
  US14/264,919
• Publication Number:
  US 20140232228A1
• Time in Patent Office: 924 Days
• Field of Search: 475/5, 180/65.22, 180/65.245
• US Class Current: 1/1
• CPC Class Codes: B60K 1/02 comprising more than one electric motor
• CPC Class Codes: B60K 2006/262 the motor or generator are used as clutch, e.g. between engine and driveshaft
• CPC Class Codes: B60K 2006/4833 Step up or reduction gearing driving generator, e.g. to operate generator in most efficient speed range
• CPC Class Codes: B60K 6/22 characterised by apparatus, components or means specially adapted for HEVs
• CPC Class Codes: B60K 6/26 characterised by the motors or the generators
• CPC Class Codes: B60K 6/36 characterised by the transmission gearings
• CPC Class Codes: B60K 6/365 with the gears having orbital motion
• CPC Class Codes: B60K 6/448 Electrical distribution type
• CPC Class Codes: B60K 6/48 Parallel type
• CPC Class Codes: B60K 6/543 the transmission being a continuously variable transmission
• CPC Class Codes: B60L 15/2054 by controlling transmissions or clutches
• CPC Class Codes: B60L 2210/10 DC to DC converters
• CPC Class Codes: B60L 2210/30 AC to DC converters
• CPC Class Codes: B60L 2210/40 DC to AC converters
• CPC Class Codes: B60L 2220/42 with use of more than one motor
• CPC Class Codes: B60L 2220/52 Clutch motors
• CPC Class Codes: B60L 2240/421 Speed
• CPC Class Codes: B60L 2240/423 Torque
• CPC Class Codes: B60L 50/16 with provision for separate direct mechanical propulsion
• CPC Class Codes: B60L 50/61 by batteries charged by engine-driven generators, e.g. series hybrid electric vehicles
• CPC Class Codes: B60W 10/06 : including control of combustion engines
• CPC Class Codes: B60W 10/08 : including control of electric propulsion units, e.g. motors or generators
• CPC Class Codes: B60W 10/10 : including control of change-speed gearings
• CPC Class Codes: B60W 20/00 : Control systems specially adapted for hybrid vehicles hybrid vehicle design, B60K6/00; electric vehicles B60L
• CPC Class Codes: B60W 20/15 : Control strategies specially adapted for achieving a particular effect
• CPC Class Codes: B60W 20/30 : Control strategies involving selection of transmission gear ratio control of change speed gearings, together with other vehicle sub-units B60W10/10; HEV transmission gearing B60K6/36; gearings and control thereof F16H
• CPC Class Codes: B60W 2510/081 : Speed
• CPC Class Codes: B60W 2710/083 : Torque
• CPC Class Codes: H02K 16/00 : Machines with more than one rotor or stator machines for transmitting mechanical power from a driving shaft to a driven shaft and comprising structurally interrelated motor and generator parts H02K51/00; permanent magnet machines with multiple rotors or stators relatively rotated for vectorially combining the excitation fields or the armature voltages H02K21/029
• CPC Class Codes: H02K 16/025 : with rotors and moving stators connected in a cascade cascade arrangement of an asynchronous motor with another dynamo-electric motor or converter H02K17/34
• CPC Class Codes: H02K 17/36 : with another asynchronous induction motor
• CPC Class Codes: H02K 47/00 : Dynamo-electric converters
• CPC Class Codes: H02K 51/00 : Dynamo-electric gears, i.e. dynamo-electric means for transmitting mechanical power from a driving shaft to a driven shaft and comprising structurally interrelated motor and generator parts
• CPC Class Codes: H02K 7/006 : Structural association of a motor or generator with the drive train of a motor vehicle
• CPC Class Codes: H02K 7/116 : with gears
• 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: Y02T 10/7072 : Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
• CPC Class Codes: Y02T 10/72 : Electric energy management in electromobility

Abstract

A rotational difference is generated between a first and a second rotor and a third rotor, which causes an induced current to flow in a first rotor winding. This causes a torque to act between the first rotor and the third rotor. The rotary magnetic field generated by the induced current flowing through a second rotor winding interacts with a second stator, which in turn generates an induced electromotive force in a second stator winding. The induced electromotive force is applied via a phase adjustment circuit to a first stator winding, which generates a rotary magnetic field and causes a torque to act between the first stator and the third rotor. The rotary magnetic field generated by the second rotor winding and the induced current flowing in the second stator winding causes a torque to act between the second stator and the second rotor.

Claims

1. A power transmission apparatus comprises:

a first rotary element having a first rotary element conductor that can generate a rotary magnetic field;

a second rotary element coupled with the first rotary element and having a second rotary element conductor that is connected to the first rotary element conductor and can generate a rotary magnetic field;

a first stationary element having a first stationary element conductor that can generate a rotary magnetic field;

a third rotary element that can rotate relative to the first and second rotary elements, wherein a torque acts between the first rotary element and the third rotary element according to the rotary magnetic field generated by the first rotary element conductor, and a torque acts between the first stationary element and the third rotary element according to the rotary magnetic field generated by the first stationary element conductor; and

a second stationary element having a second stationary element conductor through which induced current flows according to the rotary magnetic field generated by the second rotary element conductor, with an interaction between the induced current and the rotary magnetic field generated by the second rotary element conductor that can generate a torque acting between the second rotary element and the second stationary element,

wherein

power of a prime mover is transmitted to one of the first and second rotary elements and the third rotary element, and power of the other of the first and second rotary elements and the third rotary element is transmitted to a load,

the first and second rotary element conductors can generate the rotary magnetic field when induced current flows according to a rotational difference generated between the first rotary element and the third rotary element,

the first rotary element conductor and the second rotary element conductor are connected in such a manner that a rotational direction of the rotary magnetic field generated by the first rotary element conductor and a rotational direction of the rotary magnetic field generated by the second rotary element conductor are the same when induced current flows through the first rotary element conductor and the second rotary element conductor,

the number of poles of the second rotary element is equal to the number of poles of the first rotary element,

electric power can be supplied from the second stationary element conductor to the first stationary element conductor, and

a phase adjustment circuit is provided between the second stationary element conductor and the first stationary element conductor.