# US 2014/0191793 A1 · Power supply for controlling a power switch > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2014/0191793 A1 - Document ID: US20140191793A1 - Status: Published application - Kind: A1 - Application number: 14/129,027 - Filed: 2011-06-27 - Published: 2014-07-10 - Earliest claimed: 2011-06-27 - Assignees: ABB Technology AG - Inventors: Jürgen Häfner; Christer Fessel - Web page: https://patentgrep.com/patent/US20140191793A1 ## CPC - H03K 17/60: the devices being bipolar transistors (bipolar transistors having four or more electrodes H03K17/72) - H02M 1/096: the power supply of the control circuit being connected in parallel to the main switching element (H02M1/092 takes precedence) - H03K: PULSE TECHNIQUE (measuring pulse characteristics G01R; modulating sinusoidal oscillations with pulses H03C; transmission of digital information H04L; discriminator circuits detecting phase difference between two signals by counting or integrating cycles of oscillation H03D3/04; automatic control, starting, synchronisation or stabilisation of generators of electronic oscillations or pulses where the type of generator is irrelevant or unspecified H03L; coding, decoding or code conversion, in general H03M) - 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 It is presented a power supply for providing power to control a power switch for a high voltage application. The power supply comprises: a high voltage divider arranged to be connected to a first current terminal of the power switch; a step down DC/DC converter connected to an output of the high voltage divider, wherein the step down DC/DC converter is arrange to provide an output voltage for control of the at least one power switch to an output of the power supply; and a bypass control unit arranged to control the high voltage divider to short circuit an main input and a main output of the high voltage divider when the voltage across the power switch is lower than a threshold voltage. ## Claims ### Claim at position 1 1-8. (canceled) ### Claim 9 A power supply for providing power to control a power switch for a high voltage application, the power supply comprising: a high voltage divider arranged to be connected to a first controlled current terminal of the power switch; a step down DC/DC converter connected to an output of the high voltage divider, wherein the step down DC/DC converter is arrange to provide an output voltage for control of the at least one power switch to an output of the power supply; a bypass control unit arranged to control the high voltage divider to short circuit a main input and a main output of the high voltage divider when the voltage across the power switch is lower than a threshold voltage; and a voltage polarity dependent switch arranged to be connected to a second controlled current terminal of the power switch and the output of the step down DC/DC converter; and a step up DC/DC converter connected to the voltage polarity dependent switch and the output of the power supply. ### Claim 10 (depends on 9) The power supply according to claim 9, further comprising: a power limiter connected between an output of the step down DC/DC converter and the output of the power supply. ### Claim 11 (depends on 9) The power supply according to claim 9, wherein the high voltage divider comprises a plurality of serially connected resistors, selectively controlled to be part of a circuit between the first controlled current terminal of the power switch and the first DC/DC converter. ### Claim 12 (depends on 9) The power supply according to claim 9, wherein the high voltage divider comprises a plurality of serially connected capacitors, selectively controlled to be part of a circuit between the first controlled current terminal of the power switch and the first DC/DC converter. ### Claim 13 (depends on 9) The power supply according to claim 9, wherein the high voltage divider comprises a plurality of serially connected transistors, each transistor being individually controlled by the bypass control unit. ### Claim 14 (depends on 9) The power supply according to claim 9, wherein the bypass controller comprises a voltage divider, comprising a plurality of resistors, and diodes arranged to block any current from the high voltage divider. ### Claim 15 (depends on 9) The power supply according to claim 9, wherein the voltage polarity dependent switch comprises a diode bridge. ### Claim 16 (depends on 9) The power supply according to claim 9, wherein the step down DC/DC converter comprises a, Zener diode to control its output voltage. ### Claim 17 (depends on 10) The power supply according to claim 10, wherein the high voltage divider comprises a plurality of serially connected resistors, selectively controlled to be part of a circuit between the first controlled current terminal of the power switch and the first DC/DC converter. ### Claim 18 (depends on 10) The power supply according to claim 10, wherein the high voltage divider comprises a plurality of serially connected capacitors, selectively controlled to be part of a circuit between the first controlled current terminal of the power switch and the first DC/DC converter. ### Claim 19 (depends on 11) The power supply according to claim 11, wherein the high voltage divider comprises a plurality of serially connected capacitors, selectively controlled to be part of a circuit between the first controlled current terminal of the power switch and the first DC/DC converter. ### Claim 20 (depends on 10) The power supply according to claim 10, wherein the high voltage divider comprises a plurality of serially connected transistors, each transistor being individually controlled by the bypass control unit. ### Claim 21 (depends on 11) The power supply according to claim 11, wherein the high voltage divider comprises a plurality of serially connected transistors, each transistor being individually controlled by the bypass control unit. ### Claim 22 (depends on 12) The power supply according to claim 12, wherein the high voltage divider comprises a plurality of serially connected transistors, each transistor being individually controlled by the bypass control unit. ### Claim 23 (depends on 10) The power supply according to claim 10, wherein the bypass controller comprises a voltage divider, comprising a plurality of resistors, and diodes arranged to block any current from the high voltage divider. ### Claim 24 (depends on 11) The power supply according to claim 11, wherein the bypass controller comprises a voltage divider, comprising a plurality of resistors, and diodes arranged to block any current from the high voltage divider. ### Claim 25 (depends on 12) The power supply according to claim 12, wherein the bypass controller comprises a voltage divider, comprising a plurality of resistors, and diodes arranged to block any current from the high voltage divider. ### Claim 26 (depends on 13) The power supply according to claim 13, wherein the bypass controller comprises a voltage divider, comprising a plurality of resistors, and diodes arranged to block any current from the high voltage divider. ### Claim 27 (depends on 10) The power supply according to claim 10, wherein the voltage polarity dependent switch comprises a diode bridge. ### Claim 28 (depends on 11) The power supply according to claim 11, wherein the voltage polarity dependent switch comprises a diode bridge.