# US 2019/0168598 A1 · Electric vehicle > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2019/0168598 A1 - Document ID: US20190168598A1 - Status: Published application - Kind: A1 - Application number: 16/199,557 - Filed: 2018-11-26 - Published: 2019-06-06 - Earliest claimed: 2017-12-01 - Assignees: Toyota Jidosha Kabushiki Kaisha - Applicants: Toyota Jidosha Kabushiki Kaisha - Inventors: Hiroyuki HATTORI - Web page: https://patentgrep.com/patent/US20190168598A1 ## CPC - B60K 6/26: characterised by the motors or the generators - 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) - B60K 1/02: comprising more than one electric motor - B60K 17/354: having separate mechanical assemblies for transmitting drive to the front or to the rear wheels or set of wheels - B60K 23/08: for changing number of driven wheels {, for switching from driving one axle to driving two or more axles (B60K17/3515 takes precedence)} - B60L 3/0061: {relating to electrical machines} - B60L 15/2054: {by controlling transmissions or clutches} - B60K 1/04: of the electric storage means for propulsion - B60K 6/46: Series type - B60K 6/52: Driving a plurality of drive axles, e.g. four-wheel drive - B60K 17/356: having fluid or electric motor, for driving one or more wheels - B60K 2001/001: {one motor mounted on a propulsion axle for rotating right and left wheels of this axle} - B60L 15/007: {Physical arrangements or structures of drive train converters specially adapted for the propulsion motors of electric vehicles} - B60L 50/61: by batteries charged by engine-driven generators, e.g. series hybrid electric vehicles - B60W 20/11: using model predictive control [MPC] strategies, i.e. control methods based on models predicting performance {(utilising navigation and traffic information in the control strategy B60W20/12)} - B60W 20/40: Controlling the engagement or disengagement of prime movers, e.g. for transition between prime movers {(power-up or power-down of the driveline B60W30/192)} - B60Y 2400/61: Arrangements of controllers for electric machines, e.g. inverters - Y02T 10/62: Hybrid vehicles - Y02T 10/64: Electric machine technologies in electromobility - Y02T 10/70: Energy storage systems for electromobility, e.g. batteries - Y02T 10/72: Electric energy management in electromobility - 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 - B60Y: INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY - Y02T: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION ## Abstract To suppress occurrence of a counter electromotive force due to a permanent magnet motor, in an electric vehicle that includes a permanent magnet motor and a non-permanent magnet motor rotating a drive shaft. An electric vehicle includes a permanent magnet type PM motor that rotates a front wheel drive shaft. The PM motor and the drive shaft are connected and disconnected by a clutch. The electric vehicle also includes a non-permanent magnet type SR motor that rotates a rear wheel drive shaft. When the clutch disconnects the PM motor and the drive shaft, the SR motor rotates the drive shaft. ## Claims ### Claim 1 An electric vehicle comprising: a permanent magnet motor that rotates a drive shaft; a clutch that connects and disconnects the permanent magnet motor and the drive shaft; and a non-permanent magnet motor that rotates the same drive shaft or a different drive shaft, wherein when the clutch disconnects the permanent magnet motor and the drive shaft, the non-permanent magnet motor rotates the same or a different drive shaft. ### Claim 2 (depends on 1) The electric vehicle according to claim 1, wherein: at low speed, the clutch is connected and at least the permanent magnet motor performs driving; and at high speed, the clutch is disconnected and the non-permanent magnet motor performs driving. ### Claim 3 (depends on 1) The electric vehicle according to claim 1, wherein: the permanent magnet motor drives any either of a front wheel drive shaft for driving front wheels and a rear wheel drive shaft for driving rear wheels; the non-permanent magnet motor drives the other of the front wheel drive shaft and the rear wheel drive shaft; and the front wheel drive shaft and the rear wheel drive shaft are not connected and are provided separately. ### Claim 4 (depends on 1) The electric vehicle according to claim 1, wherein: the drive shaft is either one of a front wheel drive shaft for driving front wheels and a rear wheel drive shaft for driving rear wheels; and the permanent magnet motor and the non-permanent magnet motor rotate the same drive shaft selected from either the front wheel drive shaft for driving front wheels or the rear wheel drive shaft for driving rear wheels.