# US 2019/0356263 A1 · Drive device and control method for vehicle > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2019/0356263 A1 - Document ID: US20190356263A1 - Status: Published application - Kind: A1 - Application number: 16/389,306 - Filed: 2019-04-19 - Published: 2019-11-21 - Earliest claimed: 2018-05-15 - Assignees: Toyota Jidosha Kabushiki Kaisha - Applicants: Toyota Jidosha Kabushiki Kaisha - Inventors: Yoshihiro SONODA; Ryota Arakawa; Masashi Yoshimi; Hiroki Tashiro - Web page: https://patentgrep.com/patent/US20190356263A1 ## CPC - H02P 29/032: Preventing damage to the motor, e.g. setting individual current limits for different drive conditions - B60L 3/003: {relating to inverters} - B60L 3/0076: {relating to braking} - B60L 15/20: for control of the vehicle or its driving motor to achieve a desired performance, e.g. speed, torque, programmed variation of speed - B60L 58/15: Preventing overcharging - B60W 10/08: including control of electric propulsion units, e.g. motors or generators - B60W 20/14: in conjunction with braking regeneration - B60W 30/18127: {Regenerative braking} - H02P 27/08: with pulse width modulation - B60L 2260/24: Coasting mode - B60W 2710/083: Torque - H02K 47/04: Motor/generators - H02M 1/327: {against abnormal temperatures} - H02M 7/53871: {with automatic control of output voltage or current} - 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 - H02P: CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS - 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 - H02K: DYNAMO-ELECTRIC MACHINES (dynamo-electric relays H01H53/00; conversion of DC or AC input power into surge output power {H03K3/53}) - H02M: APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF (transformers H01F; dynamo-electric converters H02K47/00; controlling transformers, reactors or choke coils, control or regulation of electric motors, generators or dynamo-electric converters H02P) - Y02T: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION ## Abstract The vehicle includes an AC motor generator (MG) connected to a driving wheel, a battery, an inverter configured to convert DC power supplied from the battery to AC power and supply the AC power to the MG, and a vehicle ECU configured to control the inverter. The vehicle ECU performs a zero torque control to drive the inverter so that the output torque from the MG is zero when the battery is prohibited from being charged while the MG is being driven to rotate by the motive power from the driving wheel. ## Claims ### Claim 1 A drive device for a vehicle equipped with an AC rotating electrical machine connected to a driving wheel, comprising: a power storage device; an inverter configured to convert DC power supplied from the power storage device to AC power and supply the AC power to the rotating electrical machine; and a control device configured to control the inverter, the control device being configured to perform a zero torque control to drive the inverter so that the output torque from the rotating electrical machine is zero when the power storage device is prohibited from being charged while the rotating electrical machine is being driven to rotate by the motive power from the driving wheel. ### Claim 2 (depends on 1) The drive device according to claim 1, wherein the control device is configured to perform the zero torque control when the power storage device is prohibited from being charged while the rotating electrical machine is being driven to rotate by the motive power from the driving wheel and when it is determined that the power lost by the inverter is greater than the regenerative power from the rotating electrical machine during the zero torque control. ### Claim 3 (depends on 1) The drive device according to claim 1, wherein the inverter is electrically connected between the power storage device and the rotating electrical machine, and is provided with three-phase drive arms, each of which includes an upper arm and a lower arm, the control device is configured to perform a three-phase ON control to maintain the upper arm or the lower arm of each three-phase drive arm of the inverter in a conductive state when the power storage device is prohibited from being charged while the rotating electrical machine is being driven to rotate by the motive power from the driving wheel and when it is determined that the power lost by the inverter is not greater than the regenerative power from the rotating electrical machine during the zero torque control. ### Claim 4 (depends on 2) The drive device according to claim 2, wherein the control device is configured to: determine that the power lost by the inverter is greater than the regenerative power from the rotating electrical machine during the zero torque control when the rotation speed of the rotating electrical machine is less than a threshold value; and determine that the power lost by the inverter is not greater than the regenerative power from the rotating electrical machine during the zero torque control when the rotation speed of the rotating electrical machine is greater than the threshold value. ### Claim 5 (depends on 1) The drive device according to claim 1, wherein the control device is configured to perform a shutoff control to bring the inverter into a gate shutoff state when the power storage device is prohibited from being charged while the rotating electrical machine is being driven to rotate by the motive power from the driving wheel and when a counter electromotive voltage of the rotating electrical machine is less than the voltage of the power storage device. ### Claim 6 (depends on 3) The drive device according to claim 3, wherein even when the power storage device is prohibited from being charged while the rotating electrical machine is being driven to rotate by the motive power from the driving wheel and when it is determined that the power lost by the inverter is greater than the regenerative power from the rotating electrical machine during the zero torque control, the control device is configured to perform the three-phase ON control when it is detected that the power storage device is being charged. ### Claim 7 (depends on 3) The drive device according to claim 3, wherein even when the power storage device is prohibited from being charged while the rotating electrical machine is being driven to rotate by the motive power from the driving wheel and when it is determined that the power lost by the inverter is not greater than the regenerative power from the rotating electrical machine during the zero torque control, the control device is configured to perform the zero torque control when it is detected that the rotating electrical machine or the inverter is overheated. ### Claim 8 A method for controlling a vehicle which is equipped with an AC rotating electrical machine connected to a driving wheel, a power storage device, and an inverter, the inverter being configured to convert DC power supplied from the power storage device to AC power and supply the AC power to the rotating electrical machine, the method comprising: determining whether or not the power storage device is prohibited from being charged while the rotating electrical machine is being driven to rotate by the motive power from the driving wheel; and performing a zero torque control to drive the inverter so that the output torque from the rotating electrical machine is zero when the power storage device is prohibited from being charged while the rotating electrical machine is being driven to rotate by the motive power from the driving wheel.