# US 2020/0286459 A1 · Active vibration noise control system > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2020/0286459 A1 - Document ID: US20200286459A1 - Status: Published application - Kind: A1 - Application number: 16/648,918 - Filed: 2017-09-27 - Published: 2020-09-10 - Earliest claimed: 2017-09-27 - Assignees: Honda Motor Co., Ltd. - Applicants: Honda Motor Co., Ltd. - Inventors: Toshio INOUE; So NAKAMURA - Web page: https://patentgrep.com/patent/US20200286459A1 ## CPC - G10K 11/178: by electro-acoustically regenerating the original acoustic waves in anti-phase - H02P 6/157: {wherein the commutation is function of electro-magnetic force [EMF]} - B60R 11/02: for radio sets, television sets, telephones, or the like; Arrangement of controls thereof - G10K 11/17815: {between the reference signals and the error signals, i.e. primary path} - G10K 11/17854: {the filter being an adaptive filter} - G10K 11/17883: {the reference signal being derived from a machine operating condition, e.g. engine RPM or vehicle speed} - H02P 29/00: Arrangements for regulating or controlling electric motors, appropriate for both AC and DC motors (arrangements for starting electric motors H02P1/00; arrangements for stopping or slowing electric motors H02P3/00; control of motors that can be connected to two or more different electric power supplies H02P4/00; regulating or controlling the speed or torque of two or more electric motors H02P5/00; vector control H02P21/00) - B60L 2270/142: acoustic - G10K 2210/1282: Automobiles - G10K 2210/129: Vibration, e.g. instead of, or in addition to, acoustic noise - Y02T 10/64: Electric machine technologies in electromobility - G10K: SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR - H02P: CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS - B60R: VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR - 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 active vibration noise control system is applied to a vehicle provided with an EPS motor to change behavior of the vehicle. The active vibration noise control system includes an ANC processor configured to receive acoustic information at a predetermined position in a vehicle compartment as an error signal and control a vibration noise based on a reference signal correlate with the vibration noise and the error signal that is received and an inverse electromotive force information receiving section receiving information on an inverse electromotive force induced on the EPS motor by behavior change of the vehicle. The ANC processor utilizes as a reference signal the information on the inverse electromotive force received by the inverse electromotive force information receiving section. The active vibration noise control system actively controls the vibration noise generated in the vehicle. ## Claims ### Claim 1 An active vibration noise control system configured to be applied to a vehicle fitted with an electric motor to be driven to change a behavior of the vehicle and to actively control vibration noise generated in the vehicle, the active vibration noise control system comprising; an error signal receiving section receiving acoustic information at a predetermined position in a vehicle compartment of the vehicle as an error signal; a vibration noise control section controlling the vibration noise based on a reference signal correlating with the vibration noise and the error signal received by the error signal receiving section; and an inverse electromotive force information receiving section receiving information on an inverse electromotive force induced on the electric motor by a behavior change of the vehicle, wherein the vibration noise control section makes use of the information on the inverse electromotive force as the reference signal. ### Claim 2 (depends on 1) The active vibration noise control system as claimed in claim 1, wherein the electric motor is constituted by one of or a combination of two or more of an EPS motor generating a supplemental force for steering control, an RTC motor generating a supplemental force for toe angle control and an AS motor generating a supplemental force for damping control of an active suspension. ### Claim 3 (depends on 1) The active vibration noise control system as claimed in claim 1, further comprising an operation amount information receiving section receiving information on an target operation amount to the electric motor and an actual operation amount of the electric motor, wherein the inverse electromotive force information receiving section is configured to calculate a difference between the target operation amount to the electric motor and the actual operation amount of the electric motor which are received by the operation amount information receiving section and obtain the difference that is calculated as information on the inverse electromotive force induced on the electric motor. ### Claim 4 (depends on 3) The active vibration noise control system as claimed in claim 3, wherein the vibration noise control section makes use of information on an inverse electromotive force induced on the electric motor by the vibration noise when the electric motor is not in operation as the reference signal. ### Claim 5 (depends on 1) The active vibration noise control system as claimed in claim 1, wherein the inverse electromotive force information receiving section includes an inversely induced current protection circuit to which an inversely induced current induced to pass through the electric motor is input, and receives information on an inverse electromotive force through the inversely induced current protection circuit. ### Claim 6 (depends on 2) The active vibration noise control system as claimed in claim 2, further comprising an operation amount information receiving section receiving information on an target operation amount to the electric motor and an actual operation amount of the electric motor, wherein the inverse electromotive force information receiving section is configured to calculate a difference between the target operation amount to the electric motor and the actual operation amount of the electric motor which are received by the operation amount information receiving section and obtain the difference that is calculated as information on the inverse electromotive force induced on the electric motor. ### Claim 7 (depends on 6) The active vibration noise control system as claimed in claim 6, wherein the vibration noise control section makes use of information on an inverse electromotive force induced on the electric motor by the vibration noise when the electric motor is not in operation as the reference signal. ### Claim 8 (depends on 2) The active vibration noise control system as claimed in claim 2, wherein the inverse electromotive force information receiving section includes an inversely induced current protection circuit to which an inversely induced current induced to pass through the electric motor is input, and receives information on an inverse electromotive force through the inversely induced current protection circuit. ### Claim 9 (depends on 3) The active vibration noise control system as claimed in claim 3, wherein the inverse electromotive force information receiving section includes an inversely induced current protection circuit to which an inversely induced current induced to pass through the electric motor is input, and receives information on an inverse electromotive force through the inversely induced current protection circuit. ### Claim 10 (depends on 4) The active vibration noise control system as claimed in claim 4, wherein the inverse electromotive force information receiving section includes an inversely induced current protection circuit to which an inversely induced current induced to pass through the electric motor is input, and receives information on an inverse electromotive force through the inversely induced current protection circuit. ### Claim 11 (depends on 6) The active vibration noise control system as claimed in claim 6, wherein the inverse electromotive force information receiving section includes an inversely induced current protection circuit to which an inversely induced current induced to pass through the electric motor is input, and receives information on an inverse electromotive force through the inversely induced current protection circuit. ### Claim 12 (depends on 7) The active vibration noise control system as claimed in claim 7, wherein the inverse electromotive force information receiving section includes an inversely induced current protection circuit to which an inversely induced current induced to pass through the electric motor is input, and receives information on an inverse electromotive force through the inversely induced current protection circuit.