# US 12,422,244 B2 · Encoder, servo motor, servo system, and encoder control method > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,422,244 B2 - Document ID: US12422244B2 - Status: Granted - Kind: B2 - Application number: 18/643,946 - Filed: 2024-04-23 - Published: 2024-08-15 - Granted: 2025-09-23 - Earliest claimed: 2021-04-09 - Assignees: Kabushiki Kaisha Yaskawa Denki - Applicants: Kabushiki Kaisha Yaskawa Denki - Inventors: Ryo Inoue; Ikuma Murokita; Kenichi Sadakane; Masanobu Harada; Yuji Arinaga; Yasuhiro Matsutani - Web page: https://patentgrep.com/patent/US12422244B2 ## CPC - G01B 7/30: for measuring angles or tapers; for testing the alignment of axes - G01D 5/34792: {with only digital scales or both digital and incremental scales} - G01D 5/16: by varying resistance - G05B 19/4155: characterised by program execution, i.e. part program or machine function execution, e.g. selection of a program - H01M 10/0585: of accumulators having only flat construction elements, i.e. flat positive electrodes, flat negative electrodes and flat separators - H01M 10/46: Accumulators structurally combined with charging apparatus (circuits for charging H02J7/00) - H02J 7/865: {Battery or charger load switching, e.g. concurrent charging and load supply (H02J7/50 takes precedence)} - G01D 2205/26: Details of encoders or position sensors specially adapted to detect rotation beyond a full turn of 360°, e.g. multi-rotation - G05B 2219/34013: Servocontroller - H02J 7/933: {the cycle being controlled or terminated in response to electric parameters} - H02J 9/005: {using a power saving mode (for copiers G03G15/5004)} - Y02E 60/10: Energy storage using batteries - G01B: MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS - G01D: MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR - G05B: CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS (systems for controlling or regulating non-electric variables G05D; systems for regulating electric or magnetic variables G05F; control devices or systems insofar as characterised by mechanical features only G05G) - H01M: PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY - H02J: ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY - Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION ## Abstract An encoder includes: an optical module that detects angular position information indicating an angular position of a rotating disk within one rotation thereof; a magnetic detecting unit that detects multi-rotation information indicating the number of rotations of the disk; a battery that supplies a power to the magnetic detecting unit when an external power is not supplied to the encoder; and a connector that connects connection terminals of the battery to a substrate to which at least one of the optical module and the magnetic detecting unit is connected, via solders in contact with the connection terminals. ## Claims ### Claim 1 An encoder comprising: an angular position information detector configured to detect angular position information indicating an angular position of a rotating disk within one rotation thereof; a multi-rotation information detector configured to detect multi-rotation information indicating a number of rotations of the disk; a battery configured to supply a power to the multi-rotation information detector when an external power is not supplied to the encoder; and a single processor, wherein the single processor executes a process of switching between supply of the power from the battery to the multi-rotation information detector and stop of the supply, and a process of performing a predetermined arithmetic process based on the multi-rotation information detected by the multi-rotation information detector, the power is supplied through the processor from the battery to the multi-rotation information detector to detect the multi-rotation information, when the external power is not supplied, and the processor stops the supply of the power from the battery to the multi-rotation information detector, after acquiring the multi-rotation information from the multi-rotation information detector. ### Claim 2 (depends on 1) The encoder according to claim 1, further comprising: a substrate, on which at least the multi-rotation information detector, the battery, and the single processor are mounted; and a connector configured to directly connect a connection terminal of the battery to the substrate via a solder in contact with the connection terminal. ### Claim 3 (depends on 1) The encoder according to claim 1, wherein the processor executes, as the predetermined arithmetic process, generating first position data of the disk based on at least one of the angular position information and the multi-rotation information, when the external power is supplied, and generating second position data of the disk based on the multi-rotation information detected by the multi-rotation information detector using the power supplied from the battery, when the external power is not supplied. ### Claim 4 (depends on 1) The encoder according to claim 1, wherein the processor stops the supply of the power from the battery to the multi-rotation information detector before starting the predetermined arithmetic process. ### Claim 5 (depends on 1) The encoder according to claim 1, further comprising: a non-volatile memory capable of recording and reading data and maintaining recorded contents even when the power is OFF, wherein the processor records a result of the predetermined arithmetic process in the non-volatile memory. ### Claim 6 (depends on 1) The encoder according to claim 1, wherein when a supply of the external power is stopped, the processor enters a sleep mode by the power from the battery, and stops the supply of the power to the multi-rotation information detector in the sleep mode. ### Claim 7 (depends on 6) The encoder according to claim 6, further comprising: an electric signal generator configured to generate an electric signal in response to a rotation of the disk, wherein the processor receives the electric signal to be restored from the sleep mode and start the supply of the power to the multi-rotation information detector. ### Claim 8 (depends on 1) The encoder according to claim 1, wherein the battery is a secondary battery that is usable repeatedly by being charged, and when a state where the external power is not supplied is restored to a state where the external power is supplied, the processor executes a process of detecting an abnormality of the battery, with reference to information recorded by performing the process of detecting an abnormality of the battery based on a voltage of the battery when the external power is not supplied. ### Claim 9 (depends on 8) The encoder according to claim 8, wherein the battery is an all-solid-state battery having a solid electrolyte. ### Claim 10 (depends on 9) The encoder according to claim 9, further comprising: a charger configured to charge the all-solid-state battery when the external power is supplied, and to stop the charging of the all-solid-state battery when the external power is not supplied. ### Claim 11 (depends on 10) The encoder according to claim 10, further comprising: a rectifier electrically connected between the charger and the all-solid-state battery, and configured to regulate a current direction to a direction from the charger toward the all-solid-state battery. ### Claim 12 (depends on 10) The encoder according to claim 10, wherein the processor generates position data of the disk based on at least one of the angular position information and the multi-rotation information, when the external power is supplied, and the charger and the processor are connected to a power supply line of the external power, to be electrically parallel with each other. ### Claim 13 (depends on 1) The encoder according to claim 1, further comprising: a connector configured to directly connect a connection terminal of the battery to a substrate by a solder. ### Claim 14 (depends on 1) A servo system comprising: a motor in which a rotor rotates around a stator; the encoder of claim 1 configured to detect at least one of a position, speed, and acceleration of the rotor; and a controller configured to control the motor based on a detection result of the encoder.