# US 2010/0164422 A1 · Variable magnetic flux electric rotary machine > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2010/0164422 A1 - Document ID: US20100164422A1 - Status: Published application - Kind: A1 - Application number: 12/645,854 - Filed: 2009-12-23 - Published: 2010-07-01 - Earliest claimed: 2008-12-26 - Assignees: Hitachi, Ltd. - Inventors: Kohin SHU; Taizo MIYAZAKI; Houng Joong KIM; Satoru OKABE - Web page: https://patentgrep.com/patent/US20100164422A1 ## CPC - H02K 21/029: {Vectorial combination of the fluxes generated by a plurality of field sections or of the voltages induced in a plurality of armature sections} - B60L 2200/26: Rail vehicles - Y02T 10/64: Electric machine technologies in electromobility - H02K: DYNAMO-ELECTRIC MACHINES (dynamo-electric relays H01H53/00; conversion of DC or AC input power into surge output power {H03K3/53}) - 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 - Y02T: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION ## Abstract An electric rotary machine is disclosed which can adjust relative angles of sub-rotors continuously and regardless of torque direction without generating an attractive force between the field magnets of the sub-rotors. The electric rotary machine includes: a stator having a winding; a dual rotor which is rotatably disposed with a gap from the stator and divided axially along a shaft into a first rotor and a second rotor each having field magnets with different polarities arranged alternately in a rotation direction; a mechanism for varying the axial position of the second rotor relative to the first rotor continuously; and a non-magnetic member located between the first rotor and the second rotor. ## Claims ### Claim 1 An electric rotary machine comprising: a stator having a winding; a dual rotor which is rotatably disposed with a gap from the stator and divided axially along a shaft into a first rotor and a second rotor each having field magnets with different polarities arranged alternately in a rotation direction; a mechanism for varying an axial position of the second rotor relative to the first rotor continuously; and a non-magnetic member located between the first rotor and the second rotor. ### Claim 2 An electric rotary machine comprising: a stator having a winding; a triple rotor which is rotatably disposed with a gap from the stator and divided axially along a shaft into a first rotor, a second rotor and a third rotor each having field magnets with different polarities arranged alternately in a rotation direction; and a mechanism for varying axial positions of the second rotor and the third rotor relative to the first rotor continuously. ### Claim 3 An electric rotary machine comprising: a stator having a winding; a rotor which is rotatably disposed with a gap from the stator and divided axially along a shaft into four or more sub-rotors each having field magnets with different polarities arranged alternately in a rotation direction; and a control mechanism for controlling rotation of each rotor. ### Claim 4 (depends on 1) The electric rotary machine according to claim 1, wherein the first rotor is fixed on the shaft; wherein the second rotor can move axially while rotating through a spline structure of the shaft; and wherein a support mechanism for supporting the second rotor and adjusting its axial position is provided. ### Claim 5 (depends on 2) The electric rotary machine according to claim 2, wherein the first rotor of the triple rotor is fixed on the shaft; wherein the second rotor and the third roller can move axially while rotating through a spline structure of the shaft; wherein the third rotor is adjacent to the first rotor fixed on the shaft; and wherein the electric rotary machine has a structure for the third rotor to rotate to an angle at which an attractive force and a repulsive force of magnets of the first rotor and the third rotor are balanced and a structure for the second rotor to rotate to an angle at which centers of magnets of the second rotor are aligned with centers of reverse-polarity magnets of the first rotor fixed on the shaft. ### Claim 6 (depends on 5) The electric rotary machine according to claim 5, wherein an axial length ratio of the first rotor, fixed on the shaft of the triple rotor, to the second rotor, rotatable relative to the first rotor, is approximately 1:1. ### Claim 7 (depends on 5) The electric rotary machine according to claim 5, wherein an axial length ratio of the first rotor, fixed on the shaft of the triple rotor, to the second rotor and the third rotor, rotatable relative to the first rotor, is approximately 1:1:1. ### Claim 8 (depends on 1) A vehicle comprising: an internal combustion engine which drives wheels; a battery which charges or discharges power; a starter-alternator which is mechanically connected with a crankshaft of the internal combustion engine, driven by power supplied from the battery to drive the engine, and powered by the engine to generate power and supply the generated power to the battery; a power converter which controls power supplied to the starter-alternator and power supplied from the starter-alternator; and a controller which controls the power converter, wherein the starter-alternator is an electric rotary machine according to claim 1. ### Claim 9 (depends on 1) A vehicle comprising: an internal combustion engine which drives wheels; a battery which charges or discharges power; a motor-generator which is driven by power supplied from the battery to drive the wheels and receives a driving force from the wheels, generates power and supplies the generated power to the battery; a power converter which controls power supplied to the motor-generator and power supplied from the motor-generator; and a controller which controls the power converter, wherein the motor-generator is an electric rotary machine according to claim 1. ### Claim 10 (depends on 1) A vehicle comprising: a battery which charges or discharges power; a motor-generator which is driven by power supplied from the battery to drive wheels and receives a driving force from the wheels, generates power and supplies the generated power to the battery; a power converter which controls power supplied to the motor-generator and power supplied from the motor-generator; and a controller which controls the power converter, wherein the motor-generator is an electric rotary machine according to claim 1. ### Claim 11 (depends on 1) A mobile device comprising: a battery which charges or discharges power; and an electric rotary machine which is driven by power supplied from the battery to drive the mobile device, wherein the mobile device has output characteristics of low-speed large torque and high-speed large-output; and wherein the electric rotary machine is an electric rotary machine according to claim 1. ### Claim 12 (depends on 1) An air conditioner comprising: a compressor which compresses a refrigerant circulating in a refrigerating cycle; a motor which functions as a driving source for the compressor; a drive circuit which drives the motor; an indoor heat exchanger which exchanges heat with the refrigerant circulating in the refrigerating cycle in a room; a heat exchanger which exchanges heat with the refrigerant circulating in the refrigerating cycle outdoors; an expansion valve for the refrigerant circulating in the refrigerating cycle; and a valve which changes a flow direction of the refrigerant circulating in the refrigerating cycle, wherein the motor is an electric rotary machine according to claim 1. ### Claim 13 (depends on 1) A washing machine comprising: a washing and dewatering tub rotatably journalled in an outer tub with a shaft as its center; a rotor rotatably journalled on a bottom of the washing and dewatering tub with a shaft concentric with the shaft as its center; a switching mechanism for connecting the shaft of the washing and dewatering tub to the shaft of the rotor or disconnecting the shaft of the washing and dewatering tub from the shaft of the rotor; and a motor for rotating the rotor, wherein the motor is an electric rotary machine according to claim 1. ### Claim 14 (depends on 1) A wind power generation system comprising: a main shaft to which a blade is attached; a generator connected with the main shaft; an inverter electrically connected with the generator; a controller for controlling the inverter; means for controlling a pitch of the blade depending on a wind condition; a brake for stopping rotation of the blade; and an anemovane for detecting a wind condition, wherein the generator is an electric rotary machine according to claim 1. ### Claim 15 (depends on 1) A hybrid transport vehicle requiring overhead wires and a rail track, comprising: a plurality of types of energy supply means and drive means or a hybrid transport vehicle designed to run on a predetermined rail track, comprising: a plurality of energy supply means such as overhead wires, capacitor, fuel cell, engine or generator driven thereby; and at least one driving means for running such as a motor or engine, wherein the motor or generator is an electric rotary machine according to claim 1.