# US 11,444,526 B2 · Systems and methods for reducing physical size of power converter with active filter > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,444,526 B2 - Document ID: US11444526B2 - Status: Granted - Kind: B2 - Application number: 17/103,149 - Filed: 2020-11-24 - Published: 2022-05-26 - Granted: 2022-09-13 - Earliest claimed: 2020-11-24 - Assignees: Thermo King Corporation - Applicants: Thermo King Corporation - Inventors: Xiaorui Wang; Ryan Wayne Schumacher - Web page: https://patentgrep.com/patent/US11444526B2 ## CPC - H02M 1/08: Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters - 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 3/1582: {Buck-boost converters (H02M3/1584 takes precedence)} - H02M 7/217: using semiconductor devices only - H02M 7/48: using discharge tubes with control electrode or semiconductor devices with control electrode - B60H 1/3226: {Self-contained devices, i.e. including own drive motor} - B60H 2001/3292: {Compressor drive is electric only} - Y02T 10/88: Optimized components or subsystems, e.g. lighting, actively controlled glasses - 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) - B60H: ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES - Y02T: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION ## Abstract Methods and systems for controlling a multipurpose power converter for converting power for a transport climate control system are provided. The multipurpose power converter includes a rectifier having a first leg, a second leg, and a third leg. The multipurpose power converter also includes a first switch, a second switch, and an inductor-capacitor network. The first switch and the second switch are connected to the third leg. The inductor-capacitor network is connected to the first switch. When the first switch is on and the second switch is off, the multipurpose power converter is configured as a single-phase AC power converter. When the first switch is off and the second switch is on, the multipurpose power converter is configured as a three-phase AC power converter. ## Claims ### Claim 1 A multipurpose power converter for converting power for a transport climate control system, the multipurpose power converter comprising: a rectifier having a first leg, a second leg, and a third leg; a first switch and a second switch; and an inductor-capacitor network, wherein the first switch and the second switch are connected to the third leg, the second switch being between a power source and the third leg; the inductor-capacitor network is connected to the first switch, the first switch being between the third leg and the inductor-capacitor network; when the first switch is on and the second switch is off, the multipurpose power converter is configured as a single-phase AC power converter; and when the first switch is off and the second switch is on, the multipurpose power converter is configured as a three-phase AC power converter. ### Claim 2 (depends on 1) The multipurpose power converter according to claim 1, wherein the third leg includes a connection point between a first active switch and a second active switch, and a first end of the first switch and a first end of the second switch are connected to the connection point. ### Claim 3 (depends on 2) The multipurpose power converter according to claim 2, wherein a second end of the first switch is connected to an inductor of the inductor-capacitor network. ### Claim 4 (depends on 1) The multipurpose power converter according to claim 1, wherein when the first switch is on and the second switch is off, the third leg and the inductor-capacitor network are configured as an active filter in the single-phase AC power converter. ### Claim 5 (depends on 1) The multipurpose power converter according to claim 1, wherein when the first switch is off and the second switch is on, the inductor-capacitor network is switched off in the three-phase AC power converter. ### Claim 6 A multipurpose power converter system configured to provide AC power to a load of a transport climate control system, the multipurpose power converter system comprising: a multipurpose power converter including: a rectifier having a first leg, a second leg, and a third leg; a first switch and a second switch; and an inductor-capacitor network, wherein the first switch and the second switch are connected to the third leg, the second switch being between a power source and the third leg; the inductor-capacitor network is connected to the first switch, the first switch being between the third leg and the inductor-capacitor network; when the first switch is on and the second switch is off, the multipurpose power converter is configured as a single-phase AC power converter; and when the first switch is off and the second switch is on, the multipurpose power converter is configured as a three-phase AC power converter; a DC-link capacitor; and a controller, wherein the DC-link capacitor is connected to the multipurpose power converter, and the controller is configured to control the first switch and the second switch. ### Claim 7 (depends on 6) The multipurpose power converter system according to claim 6, wherein the third leg includes a connection point between a first active switch and a second active switch, and a first end of the first switch and a first end of the second switch are connected to the connection point. ### Claim 8 (depends on 7) The multipurpose power converter system according to claim 7, wherein a second end of the first switch is connected to an inductor of the inductor-capacitor network, and a capacitor of the inductor-capacitor network is connected to the DC-link capacitor. ### Claim 9 (depends on 6) The multipurpose power converter system according to claim 6, wherein when the first switch is on and the second switch is off, the third leg and the inductor-capacitor network are configured as an active filter in the single-phase AC power converter. ### Claim 10 (depends on 6) The multipurpose power converter system according to claim 6, wherein when the first switch is off and the second switch is on, the inductor-capacitor network is switched off in the three-phase AC power converter. ### Claim 11 (depends on 6) The multipurpose power converter system according to claim 6, wherein when a single-phase AC utility power is powering the transport climate control system, the controller is configured to switch the first switch on and to switch the second switch off. ### Claim 12 (depends on 6) The multipurpose power converter system according to claim 6, wherein when a three-phase AC utility power is powering the transport climate control system, the controller is configured to switch the first switch off and to switch the second switch on. ### Claim 13 (depends on 6) The multipurpose power converter system according to claim 6, further comprising a load, the multipurpose power converter and the DC-link capacitor are configured to provide power to the load. ### Claim 14 (depends on 13) The multipurpose power converter system according to claim 13, wherein the load includes an inverter circuit. ### Claim 15 A method for controlling a multipurpose power converter for converting power for a transport climate control system, the multipurpose power converter including a rectifier having a first leg, a second leg, and a third leg; a first switch and a second switch; and an inductor-capacitor network, the first switch and the second switch are connected to the third leg, the second switch being between a power source and the third leg; and the inductor-capacitor network is connected to the first switch, the first switch being between the third leg and the inductor-capacitor network; the method comprising: determining that the multipurpose power converter is connected to one of a single-phase AC power source and a three-phase AC power source; when the multipurpose power converter is connected to a single-phase AC power source, controlling, by a controller, the first switch on and the second switch off, so that the multipurpose power converter is configured as a single-phase AC power converter; and when the multipurpose power converter is connected to a three-phase AC power source, controlling, by the controller, the first switch off and the second switch on, so that the multipurpose power converter is configured as a three-phase AC power converter. ### Claim 16 (depends on 15) The transport climate control system according to claim 15, wherein the third leg includes a connection point between a first active switch and a second active switch, and a first end of the first switch and a first end of the second switch are connected to the connection point. ### Claim 17 (depends on 15) The transport climate control system according to claim 15, wherein a second end of the first switch is connected to an inductor of the inductor-capacitor network, and a capacitor of the inductor-capacitor network is connected to a DC-link capacitor. ### Claim 18 (depends on 15) The transport climate control system according to claim 15, wherein when the first switch is on and the second switch is off, the third leg and the inductor-capacitor network are configured as an active filter in the single-phase AC power converter. ### Claim 19 (depends on 15) The transport climate control system according to claim 15, wherein when the first switch is off and the second switch is on, the inductor-capacitor network is switched off in the three-phase AC power converter. ### Claim 20 (depends on 15) The transport climate control system according to claim 15, wherein the multipurpose power converter and a DC-link capacitor are configured to provide power to a load.