# US 8,243,474 B2 · Control circuit for power supplying

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- Number: US 8,243,474 B2
- Document ID: US8243474B2
- Status: Granted
- Kind: B2
- Application number: 12/603,793
- Filed: 2009-10-22
- Published: 2011-01-27
- Granted: 2012-08-14
- Earliest claimed: 2009-07-23
- Assignees: Feeling Technology Corp.
- Inventors: Hsuan-Chuan Chen; Teng-Tsai Lin
- Web page: https://patentgrep.com/patent/US8243474B2

## CPC

- G06F 1/20: Cooling means
- H02M 3/158: including plural semiconductor devices as final control devices for a single load
- H02P 6/28: Arrangements for controlling current (H02P6/10 takes precedence)
- H02M 3/1555: {for the generation of a regulated current to a load whose impedance is substantially inductive}
- G06F: ELECTRIC DIGITAL DATA PROCESSING (computer systems based on specific computational models G06N)
- 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)
- H02P: CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS

## Abstract

The control circuit for power supplying includes a driving module and a control module, wherein the driving module includes a first switch, a second switch, a third switch, and a fourth switch. In a first power supply mode, the first switch and the second switch are turned on, and the third switch and the fourth switch are turned off. The load current flows to the ground terminal via the first switch, the inductive load, and the second switch. When the control module sends a switching signal to the driving module, the first switch and the second switch are turned off and the third switch and the fourth switch are turned on, and the load current flows to the high potential terminal via the fourth switch, the inductive load, and the third switch due to the current inertia.

## Claims

### Claim 1

A control circuit for power supplying, electrically connecting a power supply module to provide a load current in a first direction to an inductive load, the control circuit for power supplying comprising:
a driving module having a first end point, a second end point, a third end point, and a fourth end point, the first end point electrically connecting to a high potential terminal of the power supply module, the second end point electrically connecting to a ground terminal, the third end point and the fourth end point electrically connecting to two ends of the inductive load respectively, the driving module further comprising a plurality of switches:
a first switch of the plurality of switches electrically connected between the first end point and the third end point;
a second switch of the plurality of switches electrically connected between the second end point and the fourth end point;
a third switch of the plurality of switches electrically connected between the first end point and the fourth end point; and
a fourth switch of the plurality of switches electrically connected between the second end point and the third end point; and
a control module electrically connecting the high potential terminal, the ground terminal and the driving module, wherein in a first power supply mode that the first switch and the second switch are turned on and the third switch and the fourth switch are turned off, the load current flows to the ground terminal via the first end point, the first switch, the third end point, the inductive load, the fourth end point, the second switch, and the second end point; and, while in the first power supply mode, upon when the control module sends a switching signal to the driving module, the first switch and the second switch are turned off and the third switch and the fourth switch are turned on, and the load current flows to the high potential terminal via the second end point, the fourth switch, the third end point, the inductive load, the fourth end point, the third switch and the first end point;
wherein when the power supply module is in a powered-off state, the control circuit for power supplying utilizes the inertia characteristics of the inductive load and switch the plurality of switches to change the first direction of the load current to a second direction to provide a different power supplying path to the control module.

### Claim 2 (depends on 1)

The control circuit for power supplying of claim 1, wherein the first switch is selected from the group of a Metal-Oxide Semiconductor and a relay.

### Claim 3 (depends on 1)

The control circuit for power supplying of claim 1, wherein the second switch is selected from the group of a Metal-Oxide Semiconductor and a relay.

### Claim 4 (depends on 1)

The control circuit for power supplying of claim 1, wherein the third switch is selected from the group of a Metal-Oxide Semiconductor and a relay.

### Claim 5 (depends on 1)

The control circuit for power supplying of claim 1, wherein the fourth switch is selected from the group of a Metal-Oxide Semiconductor and a relay.

### Claim 6 (depends on 1)

The control circuit for power supplying of claim 1, wherein the control module electrically connects individually with the first switch, the second switch, the third switch, and the fourth switch.

### Claim 7 (depends on 1)

The control circuit for power supplying of claim 1, further comprising a charge/discharge module electrically connected between the high potential terminal and the ground terminal, in a parallel manner with each of the power supply module, the driving module, and the control module.

### Claim 8 (depends on 7)

The control circuit for power supplying of claim 7, wherein the charge/discharge module is a capacitor.

### Claim 9 (depends on 1)

The control circuit for power supplying of claim 1, wherein the control module comprises a voltage comparison unit with a predetermined first reference voltage value for the voltage comparison unit to compare with a voltage at the high potential terminal and thereby to generate a comparison result, the control module sends the switching signal to the driving module by judging the comparison result.

### Claim 10 (depends on 1)

The control circuit for power supplying of claim 1, further comprising a driving module power switch electrically connected between the high potential terminal and the driving module, and also electrically connected with and controlled by the control module.

### Claim 11 (depends on 10)

The control circuit for power supplying of claim 10, wherein the driving module power switch is selected from the group of a Metal-Oxide Semiconductor and a relay.

### Claim 12 (depends on 1)

The control circuit for power supplying of claim 1, wherein the control module comprises a voltage comparison unit with a predetermined second reference voltage value for the voltage comparison unit to compare with a voltage at the high potential terminal and thereby to obtain a comparison result, the control module judges the comparison result to send a power switching signal to the driving module power switch so as to switch the driving module power switch and to electrically disconnect the driving module from the power supply module and the control module.