# US 2022/0045672 A1 · Safe electronic switch

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- Number: US 2022/0045672 A1
- Document ID: US20220045672A1
- Status: Published application
- Kind: A1
- Application number: 17/427,504
- Filed: 2020-01-22
- Published: 2022-02-10
- Earliest claimed: 2019-01-31
- Assignees: Siemens Aktiengesellschaft
- Applicants: Siemens Aktiengesellschaft
- Inventors: PETER KOELLENSPERGER
- Web page: https://patentgrep.com/patent/US20220045672A1

## CPC

- H03K 17/08148: {in composite switches}
- H02H 3/023: {by short-circuiting}
- H03K 2217/0009: AC switches, i.e. delivering AC power to a load
- H03K 2217/0054: Gating switches, e.g. pass gates
- 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)
- H02H: EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS (indicating or signalling undesired working conditions G01R, e.g. G01R31/00, G08B; locating faults along lines G01R31/08; emergency protective devices H01H)

## Abstract

An electronic switch has a first, a second and a third connection and is configured to disconnect a current flow between the first and the second connection. An energy source is connected between the first and the third connection, and a regenerative load is connected between the second and the third connection. The electronic switch includes a semiconductor switch capable of switching currents of different polarity. A fuse is connected between the first connection and the semiconductor switch. A first short-circuiter is connected between the input of the semiconductor switch and the third connection, and a second short-circuiter is connected between the output of the semiconductor switch and the third connection. The fuse has a current trigger threshold between a permanently permitted current and a maximally permitted current of the semiconductor switch. An electrical network having such electronic switch and a method for operating an electronic switch are disclosed.

## Claims

### Claim at position 1

-9. (canceled)

### Claim 10

An electrical network, comprising:
an energy source and a regenerative road,
an electronic switch having a first connection, a second connection and a third connection, with the energy source connected to the first connection and the third connection and the load connected to the second connection and the third connection, wherein the electronic switch is configured to disconnect a current flow between the first connection and the second connection,
a semiconductor switch comprising two semiconductors, which can each switch off a current of different polarity,
a first fuse connected between the first connection and an input of the semiconductor switch,
a first short-circuiter connected between the input of the semiconductor switch and the third connection, and
a second short-circuiter connected between the output of the semiconductor switch and the third connection.

### Claim 11 (depends on 10)

The electrical network of claim 10, wherein at least one of the first and second short-circuiters is embodied as a thyristor.

### Claim 12 (depends on 10)

The electrical network of claim 10, further comprising a second fuse connected between the output of the semiconductor switch and the second connection.

### Claim 13

A method for operating en electronic switch of an electrical network, wherein the electronic switch has a first connection, a second connection and a third connection, with an energy source connected to the first connection and the third connection and a load connected to the second connection and the third connection, wherein the electronic switch is configured to disconnect a current flow between the first connection and the second connection, the electronic switch comprising a semiconductor switch comprising two semiconductors, which can each switch off a current of different polarity, a first fuse connected between the first connection and an input of the semiconductor switch, a first short-circuiter connected between the input of the semiconductor switch and the third connection, and a second short-circuiter connected between the output of the semiconductor switch and the third connection, the method comprising
closing the first short-circuiter at least temporarily when the semiconductor switch is overloaded, and
closing the second short-circuiter at least temporarily when the first short-circuiter is being closed or is closed.

### Claim 14 (depends on 13)

The method of claim 13, further comprising closing the second short-circuiter when the first short-circuiter is closed and a current or a magnitude of the current through the semiconductor switch exceeds a predetermined limit value.

### Claim 15 (depends on 13)

The method of claim 13, wherein the second short-circuiter is closed concurrently with the first short-circuiter.