# US 2024/0204705 A1 · Motor control device and motor control method > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2024/0204705 A1 - Document ID: US20240204705A1 - Status: Published application - Kind: A1 - Application number: 18/555,569 - Filed: 2022-02-15 - Published: 2024-06-20 - Earliest claimed: 2021-04-22 - Assignees: Hitachi Astemo, Ltd. - Applicants: Hitachi Astemo, Ltd. - Inventors: Yasuaki SATO; Keisuke SUZUKI; Katsuhiro HOSHINO; Hideki SEKIGUCHI - Web page: https://patentgrep.com/patent/US20240204705A1 ## CPC - H02P 21/05: specially adapted for damping motor oscillations, e.g. for reducing hunting - B60L 15/007: {Physical arrangements or structures of drive train converters specially adapted for the propulsion motors of electric vehicles} - B60L 15/2081: {for drive off on a slope} - H02P 6/28: Arrangements for controlling current (H02P6/10 takes precedence) - H02P 21/14: Estimation or adaptation of machine parameters, e.g. flux, current or voltage - H02P 23/04: specially adapted for damping motor oscillations, e.g. for reducing hunting - H02P 27/06: using DC to AC converters or inverters (H02P27/05 takes precedence) - B60L 2210/42: Voltage source inverters - B60L 2240/529: Current - B60L 2270/145: Structure borne vibrations - 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 - Y02T: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION ## Abstract A motor control device includes: an inverter that supplies an alternating current to a motor mounted on a vehicle; a current detection unit that detects the alternating current; a position detection unit that detects a rotor phase angle of the motor; and an inverter control unit that controls the inverter based on a current value detected by the current detection unit and the rotor phase angle detected by the position detection unit, wherein the inverter control unit, in response to a timing at which vibration of the vehicle is generated, changes a current phase angle of the motor, and makes a cycle of a waveform of a resultant current of the alternating current irregular. ## Claims ### Claim 1 A motor control device comprising: an inverter that supplies an alternating current to a motor mounted on a vehicle; a current detection unit that detects the alternating current; a position detection unit that detects a rotor phase angle of the motor; and an inverter control unit that controls the inverter based on a current value detected by the current detection unit and the rotor phase angle detected by the position detection unit, wherein the inverter control unit, in response to a timing at which vibration of the vehicle is generated, changes a current phase angle of the motor, and makes a cycle of a waveform of a resultant current of the alternating current irregular. ### Claim 2 (depends on 1) The motor control device according to claim 1, wherein the motor is a three-phase motor, and the alternating current is a three-phase alternating current. ### Claim 3 (depends on 1) The motor control device according to claim 1, wherein the inverter control unit changes the current phase angle by advancing or delaying the current phase angle in a current control cycle of the alternating current. ### Claim 4 (depends on 3) The motor control device according to claim 3, wherein the inverter control unit generates a current command value that is equivalent to a torque of the motor before the current phase angle is changed even if the current phase angle is changed. ### Claim 5 (depends on 3) The motor control device according to claim 3, wherein the inverter control unit obtains a change value of the current phase angle corresponding to the current phase angle and the rotor phase angle. ### Claim 6 (depends on 5) The motor control device according to claim 5, wherein the inverter control unit maximizes a change in the current phase angle near a zero cross of the alternating current. ### Claim 7 (depends on 1) The motor control device according to claim 1, wherein the inverter control unit determines timing at which the vibration of the vehicle is generated based on a rotor phase angular velocity of the motor. ### Claim 8 (depends on 1) The motor control device according to claim 1, wherein the inverter control unit determines timing at which the vibration of the vehicle is generated based on a rotational speed of the motor or a torque of the motor. ### Claim 9 (depends on 1) The motor control device according to claim 1, wherein the inverter control unit determines timing at which the vibration of the vehicle is generated based on a driving scene of the vehicle. ### Claim 10 A motor control method used by a motor control device including: an inverter that supplies an alternating current to a motor mounted on a vehicle; a current detection unit that detects the alternating current; a position detection unit that detects a rotor phase angle of the motor; and an inverter control unit that controls the inverter based on a current value detected by the current detection unit and the rotor phase angle detected by the position detection unit, the motor control method comprising, in response to a timing at which vibration of the vehicle is generated, changing a current phase angle of the motor, and making a cycle of a waveform of a resultant current of the alternating current irregular.