# US 2013/0157042 A1 · Electrically insulating material, insulating paper, and insulating tape for a high voltage rotary machine

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- Number: US 2013/0157042 A1
- Document ID: US20130157042A1
- Status: Published application
- Kind: A1
- Application number: 13/696,665
- Filed: 2011-04-20
- Published: 2013-06-20
- Earliest claimed: 2010-05-07
- Inventors: Mario Brockschmidt; Peter Gröppel; Friedhelm Pohlmann
- Web page: https://patentgrep.com/patent/US20130157042A1

## CPC

- B32B 27/20: using fillers, pigments, thixotroping agents
- B32B 7/12: using interposed adhesives or interposed materials with bonding properties
- B32B 29/002: {as the main or only constituent of a layer, which is next to another layer of the same or of a different material (next to a layer of a particular substance B32B9/06; next to a bituminous or tarry layer B32B11/06; next to a water-setting substance layer B32B13/08; next to a metal layer B32B15/12; next to a glass layer B32B17/065; next to a layer formed of natural mineral fibres or particles B32B19/046; next to a wood layer B32B21/06; next to a cellulosic plastic layer B32B23/06; next to a natural or synthetic rubber layer B32B25/06; next to a synthetic resin layer B32B27/10)}
- H01B 3/004: {with conductive additives or conductive layers}
- H01B 3/025: {Other inorganic material}
- H02K 3/40: for high voltage, e.g. affording protection against corona discharges
- B32B 2264/102: Oxide or hydroxide
- B32B 2307/206: Insulating
- B32B 2307/302: Conductive
- Y10T 428/257: Iron oxide or aluminum oxide
- B32B: LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- H01B: CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES (selection for magnetic properties H01F1/00; waveguides H01P {; printed circuits H05K})
- H02K: DYNAMO-ELECTRIC MACHINES (dynamo-electric relays H01H53/00; conversion of DC or AC input power into surge output power {H03K3/53})
- Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION

## Abstract

An electrical insulation material for a high-voltage rotary machine includes a base resin and a filler powder distributed as the sole filler in the base resin, the powder being formed of disc-like particles of aluminum oxide. An insulation paper for a high-voltage rotary machine includes the electrical insulation material. An insulation tape for a high-voltage rotary machine includes a carrier strip and a strip of insulation paper that is applied and attached to the carrier strip.

## Claims

### Claim at position 1

1-7. (canceled)

### Claim 8

An electrical insulating material for a high voltage rotary machine, comprising:
a base resin, and
a filler powder distributed in the base resin as the sole filler and formed of disc-shaped particles made of aluminum oxide.

### Claim 9 (depends on 8)

The electrical insulating material as claimed in claim 8, wherein the proportion of the filler powder lies between 50% by vol and 75% by vol.

### Claim 10 (depends on 9)

The electrical insulating material as claimed in claim 9, wherein the proportion of the filler powder is at 70% by vol.

### Claim 11 (depends on 8)

The electrical insulating material as claimed in claim 8, wherein the filler powder exists in particle sizes in the range of 0.0002μ to 150μ.

### Claim 12 (depends on 8)

The electrical insulating material as claimed in claim 8, wherein the filler powder exists in a monomodal, bimodal or multimodal distribution.

### Claim 13 (depends on 8)

An insulating paper for a high voltage rotary machine, comprising:
an electrical insulating material as claimed in claim 8.

### Claim 14 (depends on 13)

An insulating tape for a high voltage rotary machine, comprising:
a carrier tape, and
a tape of an insulating paper as claimed in claim 13, wherein the tape of the insulating paper is applied to and secured on the carrier tape.

### Claim 15 (depends on 14)

The insulating tape as claimed in claim 14, wherein the tape of the insulating paper is glued to the carrier tape.