# US 12,224,694 B2 · Motor control device and motor control system > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,224,694 B2 - Document ID: US12224694B2 - Status: Granted - Kind: B2 - Application number: 18/716,540 - Filed: 2022-06-10 - Published: 2024-12-19 - Granted: 2025-02-11 - Earliest claimed: 2022-06-10 - Assignees: Mitsubishi Electric Corporation - Applicants: Mitsubishi Electric Corporation - Inventors: Takashi Yasue - Web page: https://patentgrep.com/patent/US12224694B2 ## CPC - H02P 29/68: based on the temperature of a drive component or a semiconductor component - B25J 13/088: {with position, velocity or acceleration sensors} - H02P 29/032: Preventing damage to the motor, e.g. setting individual current limits for different drive conditions - H02P 29/60: Controlling or determining the temperature of the motor or of the drive (H02P29/02 takes precedence) - H02P: CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS - B25J: MANIPULATORS; CHAMBERS PROVIDED WITH MANIPULATION DEVICES ({manipulators specially adapted for use in surgery A61B34/70; manipulators used in cleaning hollow articles B08B9/04}; manipulators associated with rolling mills B21B39/20; manipulators associated with forging machines B21J13/10; {manipulators associated with picking-up and placing mechanisms B23P19/007}; means for holding wheels or parts thereof B60B30/00; {vehicles with ground-engaging propulsion means, e.g. walking members B62D57/02, B62D57/032; devices for picking-up and depositing articles or materials between conveyors B65G47/90, B65G47/91; manipulators with gripping or holding means for transferring packages B65H67/065}; cranes B66C; {manipulators used in the protection or supervision of pipe-line installations F17D5/00; walking equipment adapted for nuclear steam-generators F22B37/006}; manipulators specially adapted for, or associated with, nuclear reactors G21C; {apparatus used for handling wafers during manufacture or treatment of semiconductor H10P72/50}) ## Abstract A motor control device includes, on a printed circuit board, an acceleration sensor that detects an acceleration corresponding to a posture of the printed circuit board, and outputs, as acceleration information, the acceleration detected, a temperature sensor that detects a temperature on the printed circuit board, and outputs, as detected temperature, the temperature detected, an inverter circuit that drives a motor, and a control circuit that calculates posture information indicating the posture of the printed circuit board on the basis of the acceleration information, calculates temperature information indicating a temperature of a part disposed on the printed circuit board on the basis of the detected temperature, and controls the inverter circuit by outputting, to the inverter circuit, a power supply command for the motor based on a temperature threshold set for each piece of the posture information, the posture information, and the temperature information. ## Claims ### Claim 1 A motor control device comprising: an acceleration sensor to be disposed on a printed circuit board, detect an acceleration corresponding to a posture of the printed circuit board, and output, as acceleration information, the acceleration detected; a temperature sensor to be disposed on the printed circuit board, detect a temperature on the printed circuit board, and output, as detected temperature, the temperature detected; an inverter circuit to be disposed on the printed circuit board and drive a motor; and a control circuit to be disposed on the printed circuit board, calculate posture information indicating the posture of the printed circuit board on the basis of the acceleration information, calculate temperature information indicating a temperature of a part disposed on the printed circuit board on the basis of the detected temperature, and control the inverter circuit by outputting, to the inverter circuit, a power supply command for the motor based on a temperature threshold set for each piece of the posture information, the posture information, and the temperature information. ### Claim 2 (depends on 1) The motor control device according to claim 1, wherein the temperature threshold is set on the basis of an arrangement relationship between the part and the temperature sensor. ### Claim 3 (depends on 1) The motor control device according to claim 1, wherein the temperature threshold includes a first temperature threshold and a second temperature threshold higher than the first temperature threshold, and in a case where the temperature information exceeds the first temperature threshold, the control circuit outputs, to the inverter circuit, a command to reduce a power supply amount to the motor, and in a case where the temperature information exceeds the second temperature threshold, the control circuit outputs, to the inverter circuit, a command to stop power supply to the motor. ### Claim 4 (depends on 3) The motor control device according to claim 3, wherein in a case where the temperature information exceeds the first temperature threshold and the temperature information does not exceed the second temperature threshold, the control circuit outputs, to the inverter circuit, a command to reduce a more power supply amount to the motor as the temperature information indicates a higher temperature. ### Claim 5 (depends on 1) The motor control device according to claim 1, wherein the part is the inverter circuit. ### Claim 6 (depends on 1) The motor control device according to claim 1, wherein the printed circuit board is disposed in a movable portion of a device that includes the motor, and the posture changes according to an operation of the movable portion. ### Claim 7 (depends on 6) A motor control system comprising: the motor control device according to claim 6; and the movable portion.