# US 10,321,612 B2 · Power conversion device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,321,612 B2 - Document ID: US10321612B2 - Status: Granted - Kind: B2 - Application number: 16/006,574 - Filed: 2018-06-12 - Published: 2019-02-21 - Granted: 2019-06-11 - Earliest claimed: 2017-08-15 - Assignees: Delta Electronics (Thailand) Public Co., Ltd. - Applicants: Delta Electronics (Thailand) Public Company Limited - Inventors: Dagang Liu; Junlai Huang; Xuanshun Qi; Kai Dong; Zhongwei Ke - Web page: https://patentgrep.com/patent/US10321612B2 ## CPC - H05K 7/20909: {Forced ventilation, e.g. on heat dissipaters coupled to components} - H02M 1/44: Circuits or arrangements for compensating for electromagnetic interference in converters or inverters - H05K 1/0233: {Filters, inductors or a magnetic substance} - H05K 1/141: {One or more single auxiliary printed circuits mounted on a main printed circuit, e.g. modules, adapters (H05K1/142 and H05K1/147 take precedence)} - H05K 7/1492: {having electrical distribution arrangements, e.g. power supply or data communications} - H05K 7/20172: {Fan mounting or fan specifications} - H02M 1/007: {Plural converter units in cascade (push-pull DC/DC converters with pre-regulator H02M3/3374; DC-AC converters following a DC-DC stage including a high frequency transformer H02M7/4807; DC-AC converters following a DC-DC conversion stage generating periodically varying voltages H02M7/4826)} - H02M 1/14: Arrangements for reducing ripples from DC input or output - H02M 3/003: {Constructional details, e.g. physical layout, assembly, wiring or busbar connections} - H02M 3/33576: {having at least one active switching element at the secondary side of an isolation transformer} - H05K 2201/10015: Non-printed capacitor - H05K 2201/1003: Non-printed inductor - H05K 2201/10053: Switch - H05K 2201/10272: Busbars, i.e. thick metal bars mounted on the printed circuit board [PCB] as high-current conductors - H05K 2201/10363: Jumpers, i.e. non-printed cross-over connections - H05K 2201/10409: Screws - H05K 2201/10522: Adjacent components - H05K: PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS - 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) ## Abstract A power conversion device includes a main board, an electromagnetic interference filter module, an auxiliary power module, a capacitor group, a main power unit, a control plate, an output bus bar and a fan. A first air channel is formed between the auxiliary power module and the electromagnetic interference filter module. A second air channel is formed between two rows of the capacitor group. A third air channel is formed between the two main power conversion modules of the main power unit. The control plate is perpendicularly installed on the main board. The output bus bar is perpendicularly installed on the main board, arranged in parallel with the control plate and located near the control plate. The fan is located near the main power unit and producing airflow to the first air channel, the second air channel and the third air channel. ## Claims ### Claim 1 A power conversion device, comprising: a main board; an electromagnetic interference filter module installed on the main board; an auxiliary power module, wherein the auxiliary power module and the electromagnetic interference filter module are arranged in parallel with each other and separately installed on the main board, and a first air channel is formed between the auxiliary power module and the electromagnetic interference filter module; a main power unit installed on the main board and comprising at least two main power conversion modules, wherein the at least two main power conversion modules are arranged in parallel with each other on the main board, and a third air channel is formed between the at least two main power conversion modules; and a fan producing airflow to the first air channel and the third air channel. ### Claim 2 (depends on 1) The power conversion device according to claim 1, wherein the main board comprises a first edge, a second edge, a third edge and a fourth edge, wherein the first edge and the second edge are opposed to each other, the third edge and the fourth edge are opposed to each other, and the first air channel and the third air channel are arranged between the third edge and the fourth edge. ### Claim 3 (depends on 2) The power conversion device according to claim 2, wherein a distance between the third edge and the fourth edge is longer than a distance between the first edge and the second edge, and the distance between the first edge and the second edge is in a range between 35 mm and 55 mm. ### Claim 4 (depends on 3) The power conversion device according to claim 3, wherein the distance between the first edge and the second edge is 40 mm, 45 mm or 54 mm. ### Claim 5 (depends on 2) The power conversion device according to claim 2, further comprising an input part and an output part, wherein the input part is electrically connected with an external power source and the electromagnetic interference filter module. ### Claim 6 (depends on 5) The power conversion device according to claim 5, wherein the input part comprises an input plate and at least one input terminal, wherein the input plate is connected with the electromagnetic interference filter module through a jumper wire, an opening runs through a first surface and a second surface of the input plate, and a screw is penetrated through the opening, wherein a first end of the screw is tightened in the second surface of the input plate, a second end of the screw is protruded from the first surface of the input plate and tightened in a fastening part of a casing, the power conversion device is enclosed by the casing, and the at least one input terminal is electrically connected with the electromagnetic interference filter module through the input plate. ### Claim 7 (depends on 6) The power conversion device according to claim 6, wherein the opening is larger than the first end of the screw, so that the input plate is movable relative to the screw in a horizontal direction, wherein there is a gap between the first end of the screw and the second surface of the input plate, so that the input plate is movable relative to the screw in a vertical direction. ### Claim 8 (depends on 5) The power conversion device according to claim 5, further comprising at least one output capacitor, wherein the at least one output capacitor is installed on the main board and arranged between the fan and the main power unit, and the at least one output capacitor is electrically connected with the main power unit. ### Claim 9 (depends on 1) The power conversion device according to claim 1, wherein the electromagnetic interference filter module comprises plural electromagnetic interference filter components, a common mode inductor and a first circuit board, wherein the first circuit board is inserted on the main board, and the plural electromagnetic interference filter components and the common mode inductor are disposed on the first circuit board. ### Claim 10 (depends on 1) The power conversion device according to claim 1, wherein each of the at least two main power conversion modules comprises a second circuit board, a first conversion circuit and a second conversion circuit, wherein the second circuit board is inserted on the main board, and the first conversion circuit and the second conversion circuit are disposed on the second circuit board. ### Claim 11 (depends on 10) The power conversion device according to claim 10, wherein the first conversion circuit comprises an input inductor and at least one first switch set, and the second conversion circuit comprises a transformer, at least one second switch set and a filtering inductor, wherein the input inductor, the transformer and the filtering inductor are sequentially arranged on the second circuit board. ### Claim 12 (depends on 1) The power conversion device according to claim 1, wherein output terminals of the at least two main power conversion modules are electrically connected with each other in parallel. ### Claim 13 (depends on 1) The power conversion device according to claim 1, wherein the fan is fixed on a casing, and the power conversion device is enclosed by the casing. ### Claim 14 (depends on 1) The power conversion device according to claim 1, further comprising: a capacitor group installed on the main board, wherein the capacitor group comprises at least two capacitors, and the at least two capacitors are separately arranged in at least two rows, wherein a second air channel is formed between the at least two rows of the at least two capacitors; wherein the main power unit is electrically connected with the capacitor group, wherein the first air channel, the second air channel and the third air channel are in communication with each other to define a fan airflow passageway, and the fan produces airflow to the fan airflow passageway. ### Claim 15 (depends on 1) The power conversion device according to claim 1, further comprising: a control plate perpendicularly installed on the main board, and electrically connected with the auxiliary power module and the main power unit; and an output bus bar perpendicularly installed on the main board, arranged in parallel with the control plate and located near the control plate, wherein the output bus bar is electrically connected with the main power unit. ### Claim 16 (depends on 15) The power conversion device according to claim 15, wherein the output bus bar comprises two parallel conductive plates, and the two parallel conductive plates are attached near each other with an isolation between the two parallel conductive plates, wherein each of the two conductive plates comprises plural insertion terminals, and the two parallel conductive plates are perpendicularly mounted on the main board. ### Claim 17 (depends on 15) The power conversion device according to claim 15, wherein the control plate comprises a third circuit board, and the third circuit board is inserted on the main board. ### Claim 18 (depends on 17) The power conversion device according to claim 17, wherein the auxiliary power module comprises a fourth circuit board, and the fourth circuit board is inserted on the main board, wherein the third circuit board, the fourth circuit board and the output bus bar are arranged in parallel with each other.