# US 11,114,971 B2 · Method for controlling a drive motor of an actuator as well as drive motor of an actuator > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,114,971 B2 - Document ID: US11114971B2 - Status: Granted - Kind: B2 - Application number: 16/695,394 - Filed: 2019-11-26 - Published: 2020-05-28 - Granted: 2021-09-07 - Earliest claimed: 2018-11-27 - Assignees: SBS-Feintechnik GmbH & Co. KG - Applicants: SBS-Feintechnik GmbH & Co. KG - Inventors: Uwe Gnauert - Web page: https://patentgrep.com/patent/US11114971B2 ## CPC - H02P 27/085: {wherein the PWM mode is adapted on the running conditions of the motor, e.g. the switching frequency} - H02P 29/50: Reduction of harmonics - F16K 31/046: {with electric means, e.g. electric switches, to control the motor or to control a clutch between the valve and the motor (F16K31/041 takes precedence)} - H02K 7/003: {Couplings; Details of shafts (means for mounting rotors on shafts H02K1/28)} - H02K 7/116: with gears - H02P: CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS - F16K: VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING {(devices for emptying and evacuating the excess liquid in valves or conduits F16L55/07)} - H02K: DYNAMO-ELECTRIC MACHINES (dynamo-electric relays H01H53/00; conversion of DC or AC input power into surge output power {H03K3/53}) ## Abstract In a method for controlling a drive motor of an actuator for actuating a valve, the power of the drive motor is supplied by pulse width modulated voltage controlled by a control frequency to adjust the actuator coupled to a valve into a desired position. The control frequency is changed such that a mixture of frequencies is produced. The control frequency is changed in steps. The frequencies of the mixture of frequencies are selected to be near the nominal control frequency. A drive motor of an actuator is provided that is controlled by the described method. ## Claims ### Claim 1 A method for controlling a drive motor of an actuator for actuating a valve, the method comprising: supplying a power to the drive motor by pulse width modulated voltage controlled by a control frequency to adjust the actuator coupled to a valve into a desired position; changing the control frequency such that a mixture of frequencies is produced; repeating a fixed frequency sequence of the mixture of frequencies; providing frequencies of the fixed frequency sequence for an integer number of periods, wherein the integer number of periods is in a range of 1 to 0.2×control frequency. ### Claim 2 (depends on 1) The method according to claim 1, further comprising changing the control frequency in steps. ### Claim 3 (depends on 1) The method according to claim 1, further comprising selecting frequencies of the mixture of frequencies to be near a nominal control frequency. ### Claim 4 (depends on 1) The method according to claim 1, further comprising selecting frequencies of the mixture of frequencies to extend across a plurality of frequency groups. ### Claim 5 (depends on 4) The method according to claim 4, further comprising mixing the frequencies of the mixture of frequencies within one of the frequency groups with a same incidence. ### Claim 6 (depends on 4) The method according to claim 4, further comprising mixing the frequencies of the mixture of frequencies within one of the frequency groups with different incidences. ### Claim 7 (depends on 1) The method according to claim 1, further comprising varying the frequencies with an irregular number of periods. ### Claim 8 (depends on 1) The method according to claim 1, further comprising selecting the control frequency to be in a frequency range higher than approximately 200 Hz. ### Claim 9 (depends on 1) The method according to claim 1, further comprising selecting the control frequency to be within a frequency range lower than approximately 5 kHz. ### Claim 10 (depends on 1) The method according to claim 1, further comprising controlling the drive motor of the actuator by a bridge circuit. ### Claim 11 (depends on 10) The method according to claim 10, wherein the bridge circuit is an H-bridge. ### Claim 12 (depends on 1) The method according to claim 1, further comprising driving a valve shaft of the valve by the drive motor via a gear. ### Claim 13 (depends on 1) A drive motor of an actuator for a valve shaft, the drive motor configured to be controlled by a method according to claim 1. ### Claim 14 A method for controlling a drive motor of an actuator for actuating a valve, the method comprising: supplying a power to the drive motor by pulse width modulated voltage controlled by a control frequency to adjust the actuator coupled to a valve into a desired position; changing the control frequency such that a mixture of frequencies is produced; repeating a fixed frequency sequence of the mixture of frequencies; wherein a number of frequencies of the fixed frequency sequence is in a range of 2 to 1,000. ### Claim 15 (depends on 14) The method according to claim 14, wherein the range is 2 to 50. ### Claim 16 (depends on 14) The method according to claim 14, further comprising changing the control frequency in steps. ### Claim 17 (depends on 14) The method according to claim 14, further comprising selecting frequencies of the mixture of frequencies to be near a nominal control frequency. ### Claim 18 (depends on 14) The method according to claim 14, further comprising selecting frequencies of the mixture of frequencies to extend across a plurality of frequency groups. ### Claim 19 (depends on 18) The method according to claim 18, further comprising mixing the frequencies of the mixture of frequencies within one of the frequency groups with a same incidence. ### Claim 20 (depends on 18) The method according to claim 18, further comprising mixing the frequencies of the mixture of frequencies within one of the frequency groups with different incidences. ### Claim 21 (depends on 14) A drive motor of an actuator for a valve shaft, the drive motor configured to be controlled by a method according to claim 14.