# US 12,014,874 B2 · Servo driver with simple assembly work of capacitor to housing > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,014,874 B2 - Document ID: US12014874B2 - Status: Granted - Kind: B2 - Application number: 17/635,378 - Filed: 2020-02-05 - Published: 2022-09-15 - Granted: 2024-06-18 - Earliest claimed: 2019-09-19 - Assignees: OMRON Corporation - Applicants: OMRON Corporation - Inventors: Shuhei Yamada; Keisuke Mori - Web page: https://patentgrep.com/patent/US12014874B2 ## CPC - H01G 2/02: Mountings - H01G 2/04: specially adapted for mounting on a chassis - G05B 19/404: characterised by control arrangements for compensation, e.g. for backlash, overshoot, tool offset, tool wear, temperature, machine construction errors, load, inertia (G05B19/19, G05B19/41 take precedence) - H01G 11/08: Structural combinations, e.g. assembly or connection, of hybrid or EDL capacitors with other electric components, at least one hybrid or EDL capacitor being the main component - H01G 11/78: Cases; Housings; Encapsulations; Mountings - H01G 11/82: Fixing or assembling a capacitive element in a housing, e.g. mounting electrodes, current collectors or terminals in containers or encapsulations - H02M 7/003: {Constructional details, e.g. physical layout, assembly, wiring or busbar connections} - H02M 7/48: using discharge tubes with control electrode or semiconductor devices with control electrode - H05K 7/12: Resilient or clamping means for holding component to structure - G05B 2219/41: Servomotor, servo controller till figures - H01G: CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE (selection of specified materials as dielectric H01B3/00; capacitors having potential barriers H10D1/62, H10K10/10) - 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) - H02M: APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF (transformers H01F; dynamo-electric converters H02K47/00; controlling transformers, reactors or choke coils, control or regulation of electric motors, generators or dynamo-electric converters H02P) - H05K: PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS ## Abstract A servo driver is provided with a housing, a substantially cylindrical capacitor, and a case body in which the capacitor is stored. The case body has a substantially box-like shape formed by being provided with an opening portion that makes it possible to take in and out the capacitor with respect to the case body along a direction orthogonal to an axial direction of the capacitor, and is assembled to the housing so that the opening portion is covered with a closing portion that is a part of the housing. An elastically deformable cushion material is interposed between the closing portion and the capacitor. While being elastically biased to a bottom portion of the case body, the capacitor is thereby sandwiched and held between the closing portion and the bottom portion. ## Claims ### Claim 1 A servo driver for controlling an operation of a servo motor, comprising: a capacitor that constitutes a smoothing circuit of an inverter and has a substantially cylindrical outer shape; a case body in which the capacitor is stored; and a housing that houses the capacitor and the case body, wherein the case body has a substantially box-like shape formed by being provided with an opening portion that makes it possible to take in and out the capacitor with respect to the case body along a direction orthogonal to an axial direction of the capacitor, wherein the case body is assembled to the housing so that the opening portion is covered with a closing portion that is a part of the housing, and wherein the capacitor is sandwiched and held between the closing portion and a bottom portion of the case body located on a side opposite to a side on which the opening portion is provided while being elastically biased to the bottom portion with a cushion material that is elastically deformable and is interposed between the closing portion and the capacitor. ### Claim 2 (depends on 1) The servo driver according to claim 1, wherein the cushion material is attached to either the closing portion or the capacitor. ### Claim 3 (depends on 2) The servo driver according to claim 2, wherein the housing comprises a lid body comprising a portion in which the closing portion is provided and a box body having an opening closed by the lid body, wherein the case body has a plurality of protrusions protruding in a direction orthogonal to a direction in which the opening portion and the bottom portion are aligned with each other, wherein a plurality of holes is provided in a portion of the box body facing the case body in the direction orthogonal to the direction in which the opening portion and the bottom portion are aligned with each other, and wherein the case body is fixed to the box body by the plurality of protrusions being fitted to the plurality of holes. ### Claim 4 (depends on 1) The servo driver according to claim 1, wherein the housing comprises a lid body comprising a portion in which the closing portion is provided and a box body having an opening closed by the lid body, wherein the case body has a plurality of protrusions protruding in a direction orthogonal to a direction in which the opening portion and the bottom portion are aligned with each other, wherein a plurality of holes is provided in a portion of the box body facing the case body in the direction orthogonal to the direction in which the opening portion and the bottom portion are aligned with each other, and wherein the case body is fixed to the box body by the plurality of protrusions being fitted to the plurality of holes. ### Claim 5 (depends on 1) The servo driver according to claim 1, comprising: an electricity storage state detection unit provided with a detection circuit that detects an electricity storage state of the capacitor by measuring a potential difference between a pair of connection terminals of the capacitor and a light emitting body that displays a detection result obtained from the detection circuit by being lit or not, wherein the electricity storage state detection unit is assembled to the case body, and a display window part enabling visual recognition from the outside of whether the light emitting body is lit or not is provided in the housing. ### Claim 6 (depends on 1) The servo driver according to claim 1, wherein the capacitor and a circuit element component to be electrically connected to the capacitor are connected by a bus bar, and wherein the bus bar is divided into a capacitor-side bus bar having one end connected to the capacitor and a circuit element component-side bus bar having one end connected to the circuit element component and the other end connected to the other end of the capacitor-side bus bar. ### Claim 7 (depends on 1) The servo driver according to claim 1, wherein the case body is made of an insulating resin member. ### Claim 8 (depends on 1) The servo driver according to claim 1, wherein the cushion material is made of a cushion sheet having high thermal conductivity.