# US 2014/0197816 A1 · Tap changer

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- Number: US 2014/0197816 A1
- Document ID: US20140197816A1
- Status: Published application
- Kind: A1
- Application number: 13/978,717
- Filed: 2012-01-30
- Published: 2014-07-17
- Earliest claimed: 2011-02-05
- Inventors: Jochen Von Bloh; Dieter Dohnal; Karsten Viereck
- Web page: https://patentgrep.com/patent/US20140197816A1

## CPC

- G05F 1/20: semiconductor devices only
- E01H 1/1206: {for picking up excrements (manure or urine pouches for animal husbandry A01K23/00)}
- H02M 5/12: for conversion of voltage or current amplitude only
- H02M 5/257: using semiconductor devices only
- H02P 13/06: by tap-changing; by rearranging interconnections of windings
- E01H 2001/1293: {Walking cane or the like, i.e. implements allowing handling while in an upright position}
- H01F 29/02: with tappings on coil or winding; with provision for rearrangement or interconnection of windings
- H02M 1/32: Means for protecting converters other than automatic disconnection
- G05F: SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
- E01H: STREET CLEANING; CLEANING OF PERMANENT WAYS; CLEANING BEACHES; DISPERSING {OR PREVENTING} FOG IN GENERAL {CLEANING STREET OR RAILWAY FURNITURE OR TUNNEL WALLS}(cleaning in general B08B)
- 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
- H01F: MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES

## Abstract

The invention relates to a stepping switch for voltage control, comprising semiconductor switch elements on a variable transformer having associated regulating windings. The stepping switch has a modular design, wherein each module comprises a respective sub-winding of the regulating winding which can be activated or deactivated by semiconductor switch elements.

## Claims

### Claim 1

A tap changer for voltage regulation with semiconductor switching elements at a regulating transformer with a regulating winding, the tap changer comprising:
two switching subassemblies connected in series and each having a parallel connection of two branches,
two semiconductor switching units in series connection with one another in the first branch,
two further semiconductor switching units in series connection with one another in the parallel second branch,
a first sub-winding of the regulating winding between the two serially connected semiconductor switching units in the first branch and the two serially connected semiconductor switching units in the second branch, the second switching subassembly having a parallel connection of three branches,
two semiconductor switching units in series connection with one another in the third branch,
two semiconductor switching units in series connection with one another in the fourth branch, and
two semiconductor switching units in series connection with one another in the fifth branch,
a second sub-winding of the regulating winding between the two serially connected semiconductor switching units in the third branch and the two serially connected semiconductor switching units in the fourth branch, and
a third sub-winding between the two serially connected semiconductor switching units in the fourth branch and the two serially connected semiconductor switching units if in the fifth branch, one of the two switching subassemblies being electrically connected with the load diverter.

### Claim 2 (depends on 1)

The tap changer according to claim 1, wherein the sub-windings have different winding numbers.

### Claim 3 (depends on 1)

The tap changer according to claim 1, wherein at least one of the semiconductor switching units consists of a series connection of two or more individual semiconductor switches.