# US 2014/0153296 A1 · Isolated power conversion apparatus and method of converting power > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2014/0153296 A1 - Document ID: US20140153296A1 - Status: Published application - Kind: A1 - Application number: 14/096,836 - Filed: 2013-12-04 - Published: 2014-06-05 - Earliest claimed: 2012-12-05 - Assignees: Hep Tech Co., Ltd. - Applicants: Hep Tech Co., Ltd. - Inventors: Ching-Tsai PAN; Po-Yen CHEN; Ta-Sheng HUNG - Web page: https://patentgrep.com/patent/US20140153296A1 ## CPC - H02M 3/335: using semiconductor devices only - H02M 1/346: {Passive non-dissipative snubbers} - H02M 3/33523: {with galvanic isolation between input and output of both the power stage and the feedback loop} - 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 An isolated power conversion apparatus includes an isolation transformer and an auto charge pump circuit. The isolation transformer has a primary side and a second side, wherein the primary side is electrically connected to a pulsed power supply, and the secondary side has a first end and a second end; the auto charge pump circuit electrically connects the isolation transformer to a loading to improve power conversion efficiency and suppress output voltage ripples. ## Claims ### Claim 1 An isolated power conversion apparatus for converting electric power of a pulsed power supply and transmitting the converted electric power to a loading, comprising: an isolated transformer having a primary side and a secondary side, wherein the primary side is electrically connected to the pulsed power supply, and the secondary side has a first end and a second end; and an auto charge pump circuit electrically connecting the isolated transformer to the loading, comprising: a first diode having an anode and a cathode, wherein the anode is connected to the second end of the secondary side of the isolated transformer, and the cathode is connected to the first end of the secondary side of the isolated transformer; a first capacitor having an end electrically connected to the first end of the secondary side and the cathode of the first diode; an inductor electrically connecting another end of the first capacitor to the cathode of the first diode; and a second capacitor, which is electrically connected to the loading in parallel, having two ends, one of which is electrically connected to the first capacitor and the inductor, and the other of which is electrically connected to the anode of the first diode and the second end of the secondary side of the isolated transformer. ### Claim 2 (depends on 1) The isolated power conversion apparatus of claim 1, further comprising a second diode having an anode and a cathode, wherein the anode of the second diode is connected to the cathode of the first diode, and the cathode thereof is connected to the inductor. ### Claim 3 (depends on 1) The isolated power conversion apparatus of claim 1, further comprising a third diode, which is set at the first end of the secondary side of the isolated transformer, having an anode and a cathode, wherein the cathode of the third diode is connected to the cathode of the first diode and the first capacitor, and the anode thereof is connected to the secondary side. ### Claim 4 (depends on 1) The isolated power conversion apparatus of claim 1, wherein the first capacitor is a non-polarity capacitor. ### Claim 5 (depends on 1) The isolated power conversion apparatus of claim 1, wherein the second capacitor is a non-polarity capacitor. ### Claim 6 A method of converting power, comprising the steps of: A. charging an isolated transformer at a primary side thereof with electric power provided by a pulsed power supply, and providing energy to a loading from an inductor, a first capacitor, and a second capacitor which are connected in parallel; B. charging the inductor, the first capacitor, and the second capacitor by a secondary side of the isolated transformer to keep providing energy to the loading from the second capacitor when the pulsed power supply stops providing the electric power; C. conducting a diode to make the first capacitor and the inductor generate a reverse voltage, and to charge the second capacitor for keeping providing energy to the loading. ### Claim 7 (depends on 6) The method of claim 6, further comprising the step of repeating the steps from the step A to the step C after the step C. ### Claim 8 (depends on 6) The method of claim 6, wherein the secondary side of the isolated transformer transmits stored energy thereof to the second capacitor through a resonant circuit formed by the first capacitor and the inductor in the step B. ### Claim 9 (depends on 8) The method of claim 8, wherein once the resonant circuit is formed, a voltage drop of the first capacitor reverses to conduct the diode. ### Claim 10 (depends on 8) The method of claim 8, wherein the pulsed power supply has a switch; the pulsed power supply provides the electric power when the switch is on, and stops providing the electric power when the switch is off. ### Claim 11 An auto charge pump circuit for receiving electric power from a pulsed power supply and providing energy to a loading, wherein the pulsed power supply has a first output and a second output; the auto charge pump circuit comprising” a first diode having an anode and a cathode, wherein the anode is electrically connected to the second output of the pulsed power supply, and the cathode is electrically connected to the first output of the pulsed power supply; a first capacitor having two ends, one of which is electrically connected to the first output of the pulsed power supply and the cathode of the first diode; an inductor electrically connecting the other end of the first capacitor to the cathode of the first diode; and a second capacitor, which is connected to the loading in parallel, having tow ends, one of which is electrically connected to the first capacitor and the inductor, and the other of which is electrically connected to the anode of the first diode and the second output of the pulsed power supply. ### Claim 12 (depends on 1) The auto charge pump circuit of claim 1, further comprising a second diode having an anode and a cathode, wherein the anode of the second diode is connected to the cathode of the first diode, and the cathode thereof is connected to the inductor.