# US 10,483,882 B2 · Drive device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,483,882 B2 - Document ID: US10483882B2 - Status: Granted - Kind: B2 - Application number: 16/019,001 - Filed: 2018-06-26 - Published: 2019-03-21 - Granted: 2019-11-19 - Earliest claimed: 2017-09-19 - Assignees: Toyota Jidosha Kabushiki Kaisha - Applicants: Toyota Jidosha Kabushiki Kaisha - Inventors: Shinjiro Ashida - Web page: https://patentgrep.com/patent/US10483882B2 ## CPC - B60L 3/0038: {relating to sensors} - H02P 6/15: Controlling commutation time - B60L 3/0092: {with use of redundant elements for safety purposes} - 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 50/50: using propulsion power supplied by batteries or fuel cells - H02P 6/16: Circuit arrangements for detecting position - H02P 29/024: Detecting a fault condition, e.g. short circuit, locked rotor, open circuit or loss of load - B60L 2200/10: Air crafts - B60L 2200/32: Waterborne vessels - B60L 2270/147: electro magnetic [EMI] - 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 - 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 - H02P: CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS - Y02T: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION ## Abstract A drive device includes a motor, an inverter, and a rotation angle detector. The rotation angle detector includes a resolver and an electronic control unit. The electronic control unit converts a signal from the resolver to a master rotation angle of the motor. The electronic control unit converts a signal obtained by attenuating a high frequency component of a frequency higher than a predetermined frequency with respect to the signal from the resolver to a slave rotation angle of the motor. The electronic control unit determines that the master rotation angle is normal when a determination condition that a difference between the master rotation angle and the slave rotation angle is equal to or greater than a first threshold and a temporal variation as a variation of the master rotation angle per unit time is equal to or greater than a second threshold is not established. ## Claims ### Claim 1 A drive device comprising: a motor; an inverter configured to drive the motor with switching of a plurality of switching elements; and a rotation angle detector configured to detect a rotation angle of the motor, the rotation angle detector including a resolver and an electronic control unit, wherein: the resolver is attached to a rotational shaft of the motor and is configured to output a signal according to rotation of the motor; the electronic control unit is configured to convert a signal from the resolver to a master rotation angle of the motor; the electronic control unit is configured to convert a signal obtained by attenuating a high frequency component of a frequency higher than a predetermined frequency with respect to the signal from the resolver to a slave rotation angle of the motor; and the electronic control unit is configured to determine that the master rotation angle is normal when a determination condition that a difference between the master rotation angle and the slave rotation angle is equal to or greater than a first threshold and a temporal variation as a variation of the master rotation angle per unit time is equal to or greater than a second threshold is not established, and determine that the master rotation angle is abnormal when the determination condition is established. ### Claim 2 (depends on 1) The drive device according to claim 1, wherein the electronic control unit is configured to determine that the determination condition is established when a proportion of a state in which the difference is equal to or greater than the first threshold and the temporal variation is equal to or greater than the second threshold is equal to or greater than a third threshold for a predetermined time, and determine that the master rotation angle is abnormal. ### Claim 3 (depends on 1) The drive device according to claim 1, wherein: the electronic control unit is configured to convert the signal from the resolver to the master rotation angle using a first gain; and the electronic control unit is configured to convert the signal from the resolver to the slave rotation angle using a second gain smaller than the first gain. ### Claim 4 (depends on 1) The drive device according to claim 1, wherein: the electronic control unit is configured to convert the signal from the resolver to the master rotation angle using a predetermined gain; the electronic control unit is configured to perform filter processing for attenuating the high frequency component with respect to the signal from the resolver to generate a filtered signal; and the electronic control unit is configured to convert the filtered signal to the slave rotation angle using the predetermined gain. ### Claim 5 (depends on 1) The drive device according to claim 1, wherein: the electronic control unit is configured to convert the signal from the resolver to the master rotation angle using a predetermined gain; and the electronic control unit is configured to perform filter processing for attenuating the high frequency component with respect to the master rotation angle to generate the slave rotation angle. ### Claim 6 (depends on 1) The drive device according to claim 1, wherein the electronic control unit is configured to control the inverter using the master rotation angle in a case where the electronic control unit determines that the master rotation angle is normal, and control the inverter using the slave rotation angle in a case where the electronic control unit determines that the master rotation angle is abnormal.