# US 2014/0152208 A1 · Power factor correction device, power supply, and motor driver > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2014/0152208 A1 - Document ID: US20140152208A1 - Status: Published application - Kind: A1 - Application number: 13/782,830 - Filed: 2013-03-01 - Published: 2014-06-05 - Earliest claimed: 2012-12-05 - Assignees: Samsung Electro-Mechanics Co., Ltd. - Applicants: Samsung Electro-Mechanics Co., Ltd. - Inventors: In Wha JEONG; Bum Seok SUH; Min Gyu PARK - Web page: https://patentgrep.com/patent/US20140152208A1 ## CPC - H02M 1/4225: {using a non-isolated boost converter} - H02M 3/1584: {with a plurality of power processing stages connected in parallel} - H02M 7/2176: {comprising a passive stage to generate a rectified sinusoidal voltage and a controlled switching element in series between such stage and the output} - 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 There is provided a power factor correction device including, a first switch switching input power to adjust a phase difference between a current and a voltage of the input power, a second switch switched on before the first switch is switched on to form a transfer path for residual power in the first switch, a first inductor charging and discharging energy according to switching of the first switch, and a second inductor adjusting an amount of current flowing through the second switch according to switching of the second switch, wherein the first inductor and the second inductor are inductively coupled. ## Claims ### Claim 1 A power factor correction device comprising: a first switch switching input power to adjust a phase difference between a current and a voltage of the input power; a second switch switched on before the first switch is switched on to form a transfer path for residual power in the first switch; a first inductor charging and discharging energy according to switching of the first switch; and a second inductor adjusting an amount of current flowing through the second switch according to switching of the second switch, wherein the first inductor and the second inductor are inductively coupled. ### Claim 2 (depends on 1) The power factor correction device of claim 1, wherein the first inductor and the second inductor are inductively coupled in a differential mode. ### Claim 3 (depends on 1) The power factor correction device of claim 1, further comprising a magnetic core shared by the first inductor and the second inductor. ### Claim 4 (depends on 3) The power factor correction device of claim 3, wherein the magnetic core includes at least one of an iron core and a ferrite core. ### Claim 5 (depends on 1) The power factor correction device of claim 1, further comprising: a diode providing a transfer path for power emitted from the first inductor according to the switching of the first switch; and a capacitor stabilizing the power transferred from the diode. ### Claim 6 (depends on 1) The power factor correction device of claim 1, wherein the input power is rectified power. ### Claim 7 (depends on 1) The power factor correction device of claim 1, wherein the second switch is switched on or off before the first switch is switched on. ### Claim 8 (depends on 1) The power factor correction device of claim 1, wherein the second switch is switched on before the first switch is switched on, and is switched off after the first switch is switched on. ### Claim 9 (depends on 1) The power factor correction device of claim 1, further comprising a control unit that outputs a control signal for the first switch and the second switch. ### Claim 10 (depends on 1) The power factor correction device of claim 1, wherein the first switch and the second switch include at least one of a transistor, an insulated gate bipolar transistor (IGBT) and a metal oxide semiconductor field-effect transistor (MOS-FET). ### Claim 11 A power factor correction device comprising: a first switch switching input power to adjust a phase difference between a current and a voltage of the input power; a second switch switched on before the first switch is switched on so as to form a transfer path for residual power in the first switch; a first inductor connected between a power input terminal for supplying the input power and the first switch; and a second inductor connected between a connection terminal between the first switch and the first inductor, and the second switch, wherein the first inductor and the second inductor are inductively coupled. ### Claim 12 A power supply comprising: a power factor correction circuit including a first inductor charging and discharging energy according to switching of a first switch and a second inductor adjusting an amount of current flowing through a second switch according to switching of the second switch; a power converting unit switching power from the power factor correction circuit to convert the power to a previously set power; and a switching control unit controlling power switching of the power converting unit. ### Claim 13 (depends on 12) The power supply of claim 12, wherein the first inductor and the second inductor are inductively coupled in a differential mode. ### Claim 14 (depends on 12) The power supply of claim 12, further comprising a magnetic core shared by the first inductor and the second inductor. ### Claim 15 (depends on 14) The power supply of claim 14, wherein the magnetic core includes at least one of an iron core and a ferrite core. ### Claim 16 A motor driver comprising: a power factor correction circuit including a first inductor charging and discharging energy according to switching of a first switch and a second inductor adjusting an amount of current flowing through a second switch according to switching of the second switch; a driver switching power from the power factor correction circuit to drive a motor; and a driving control unit controlling power switching of the driver. ### Claim 17 (depends on 16) The motor driver of claim 16, wherein the first inductor and the second inductor are inductively coupled in a differential mode. ### Claim 18 (depends on 16) The motor driver of claim 16, further comprising a magnetic core shared by the first inductor and the second inductor. ### Claim 19 (depends on 17) The motor driver of claim 17, wherein the magnetic core includes at least one of an iron core and a ferrite core.