# US 7,746,206 B2 · Inverter transformer and inverter power module having the same for use in electric/electronic device

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- Number: US 7,746,206 B2
- Document ID: US7746206B2
- Status: Granted
- Kind: B2
- Application number: 11/770,770
- Filed: 2007-06-29
- Published: 2008-07-31
- Granted: 2010-06-29
- Earliest claimed: 2007-01-26
- Assignees: Samsung Electronics Co., Ltd.
- Inventors: Cheol-jin Park
- Web page: https://patentgrep.com/patent/US7746206B2

## CPC

- H01F 38/10: Ballasts, e.g. for discharge lamps
- H01F 27/36: Electric or magnetic shields or screens (movable for varying inductance H01F21/10)
- H02M 7/003: {Constructional details, e.g. physical layout, assembly, wiring or busbar connections}
- H05B 41/2822: {using specially adapted components in the load circuit, e.g. feed-back transformers, piezoelectric transformers; using specially adapted load circuit configurations}
- H01F 27/065: {Mounting on printed circuit boards}
- H01F 2005/043: {having multiple pin terminals, e.g. arranged in two parallel lines at both sides of the coil}
- H01F: MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- 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)
- H05B: ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL

## Abstract

An inverter power module for use in an electric/electronic device includes a driving circuit board, a power transformer mounted on the driving circuit board, an inverter transformer mounted on the driving circuit board, and a blocking unit to block a magnetic flux that is generated from the inverter transformer from being emitted to the outside. With this, the magnetic flux that is generated from the inverter transformer is blocked from being emitted to the outside, thereby allowing an EMI noise, a heating problem, a noise of the system circuit, etc. to be minimized.

## Claims

### Claim 1

An inverter power module for use in an electric/electronic device, comprising:
a driving circuit board;
a power transformer mounted on the driving circuit board;
an inverter transformer mounted on a first side of the driving circuit board, comprising a cover; and a blocking unit which blocks a magnetic flux that is generated from the inverter transformer from being emitted to the outside;
wherein the blocking unit comprises a first blocking unit having a second core, and
wherein the cover comprises an inserting groove formed therein into which the second core is detachably disposed such that the cover surrounds a top surface and a bottom surface of the second core entirely when the second core is disposed in the cover.

### Claim 2 (depends on 1)

The inverter power module as claimed in claim 1, wherein the inverter transformer further comprises:
a bobbin having a plurality of lead pins connected to the driving circuit board;
a first core disposed in the bobbin; and
a coil wound on the bobbin and connected to the lead pins;
wherein the cover accommodates the bobbin, the first core and the coil.

### Claim 3 (depends on 2)

The inverter power module as claimed in claim 2, wherein the second core is disposed side by side to the first core.

### Claim 4 (depends on 2)

The inverter power module as claimed in claim 2, wherein the second core has a horizontal area larger than that of the first core.

### Claim 5 (depends on 2)

The inverter power module as claimed in claim 2, wherein the blocking unit further comprises a second blocking unit which blocks the magnetic flux from being emitted below the inverter transformer.

### Claim 6 (depends on 5)

The inverter power module as claimed in claim 5, wherein the second blocking unit comprises a third core detachably disposed to a protection element installed below the driving circuit board to correspond to the inverter transformer.

### Claim 7 (depends on 6)

The inverter power module as claimed in claim 6, wherein the third core is disposed side by side to the first and the second cores.

### Claim 8 (depends on 7)

The inverter power module as claimed in claim 7, wherein the protection element has an inserting groove formed to insert the third core.