# US 2023/0412062 A1 · Resonant 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 2023/0412062 A1 - Document ID: US20230412062A1 - Status: Published application - Kind: A1 - Application number: 18/251,307 - Filed: 2020-11-06 - Published: 2023-12-21 - Earliest claimed: 2020-11-06 - Assignees: Nissan Motor Co., Ltd.; RENAULT s.a.s. - Applicants: Nissan Motor Co., Ltd.; Renault S.A.S. - Inventors: Taku Shimomura; Keiichiro Numakura; Akinori Okubo - Web page: https://patentgrep.com/patent/US20230412062A1 ## CPC - H02M 1/0054: {Transistor switching losses (periodically suspending operation of switching converter in low power mode H02M1/0035)} - H02M 1/0058: {by employing soft switching techniques, i.e. commutation of transistors when applied voltage is zero or when current flow is zero (using an auxiliary actively switched resonant commutation circuit connected to an intermediate DC voltage or between two push-pull branches of an inverter bridge H02M7/4811; in resonant inverters H02M7/4815; in inverters operating from a resonant DC source H02M7/4826)} - H02M 1/08: Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters - H02M 3/015: {with means for adaptation of resonance frequency, e.g. by modification of capacitance or inductance of resonance circuit} - H02M 3/156: with automatic control of output voltage or current, e.g. switching regulators - H02M 7/4815: {Resonant converters (H02M7/4811 and H02M7/4826 take precedence)} - H02M 7/4818: {with means for adaptation of resonance frequency, e.g. by modification of capacitance or inductance of resonance circuits} - Y02B 70/10: Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes - 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) - Y02B: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS ## Abstract A resonant power conversion device includes: a main circuit provided with a semiconductor switch, a capacitor and an inductor connected in series or parallel to the semiconductor switch; and a drive circuit configured to drive the switching element. The switching element enters an off-state or an on-state depending on a control voltage input to a gate terminal, and the drive circuit includes two or more types of control voltages, as a control voltage at which the switching element enters an off-state. ## Claims ### Claim 1 A resonant power conversion device comprising: a main circuit provided with a switching element having a high-potential terminal, a low-potential terminal and a control terminal, and provided with a capacitor and an inductor connected in series or parallel to the high potential terminal or the low potential terminal, and the main circuit being configured to convert and output input power; and a drive circuit configured to output a control signal to the control terminal and drive the switching element, wherein the switching element enters an off-state or an on-state depending on a signal value of the control signal input to the control terminal, the drive circuit includes two or more types of signal values, as the signal value of the control signal at which the switching element enters an off-state, and each of the two or more types of signal values is set in accordance with a resonant frequency to be generated in the main circuit. ### Claim 2 (canceled) ### Claim 3 (depends on 1) The resonant power conversion device according to claim 1, wherein the drive circuit changes the signal value of the control signal at which the switching element enters an off-state, using the two or more types of signal values. ### Claim 4 (depends on 3) The resonant power conversion device according to claim 3, wherein the drive circuit, when changing the switching element to a second off-period coming after an on-period after a first off-period, changes a signal value of the control signal in the second off-period from a signal value of the control signal in the first off-period. ### Claim 5 (depends on 4) The resonant power conversion device according to claim 4, wherein the drive circuit changes the signal value of the control signal in the second off-period from the signal value of the control signal in the first off-period, based on input and output of the main circuit and based on one or more values among a voltage, current, and temperature of the semiconductor switch, the capacitor, and the inductor. ### Claim 6 (depends on 5) The resonant power conversion device according to claim 5, wherein the drive circuit, when output of the main circuit increases, makes the signal value of the control signal in the second off-period greater than the signal value of the control signal in the first off-period. ### Claim 7 (depends on 3) The resonant power conversion device according to claim 3, wherein the drive circuit changes the signal value of the control signal in one off-period, one or more times, and in the off-period, sets a first period in which the signal value of the control signal is low and a second period in which the signal value of the control signal is greater than that of the first period. ### Claim 8 (depends on 7) The resonant power conversion device according to claim 7, wherein the drive circuit changes one or both of a ratio between the first period and the second period in the off-period and a ratio of the signal value of the control signal in the first period and the signal value of the control signal in the second period, based on input and output of the main circuit and based on one or more values among a voltage, current, and temperature of the semiconductor switch, the capacitor, and the inductor. ### Claim 9 (depends on 7) The resonant power conversion device according to claim 7, wherein the drive circuit sets the first period and the second period in the off-period, in order from the first period to the second period. ### Claim 10 (depends on 3) The resonant power conversion device according to claim 3, wherein the drive circuit continuously changes the signal value of the control signal in accordance with a transition of time in one off period.