Circuit breaker and power supply system

Patent metadata

Field	Value
Publication number	US-12597579-B2
Application number	US-202318470780-A
Country	US
Kind code	B2
Filing date	Sep 20, 2023
Priority date	Mar 30, 2021
Publication date	Apr 7, 2026
Grant date	Apr 7, 2026

Abstract

A circuit breaker includes a mechanical switch circuit, and the mechanical switch circuit includes a busbar, a power module, and a drive module. The power module includes a movable contact and a stationary contact that is electrically connected to the busbar. When the movable contact is connected to the stationary contact, the mechanical switch circuit is connected. The drive module includes a switch circuit, a movable coil, and a stationary coil. The movable coil and the stationary coil are disposed adjacently, the switch circuit is configured to control a current direction of the movable coil and a current direction of the stationary coil, and the movable coil and the stationary coil attract or repel each other based on whether the current directions are the same to enable the movable coil to drive the movable contact to be connected to or disconnected from the stationary contact.

First claim

What is claimed is:

1 . A circuit breaker, comprising a mechanical switch circuit, wherein the mechanical switch circuit comprises:
a busbar; a power module, comprising a movable contact and a stationary contact that is electrically connected to the busbar, wherein, when the movable contact is connected to the stationary contact, the mechanical switch circuit is connected-, and when the movable contact is disconnected from the stationary contact, the mechanical switch circuit is disconnected; and a drive module, comprising a switch circuit, a movable coil, and a stationary coil, wherein the movable coil and the stationary coil are disposed adjacently to form a single coil pair, the switch circuit is configured to control a current direction of the movable coil and a current direction of the stationary coil, and the movable coil and the stationary coil attract each other when the current direction of the movable coil is aligned with the current direction of the stationary coil, and repel each other when the current direction of the movable coil is opposite to the current direction of the stationary coil, to enable the movable coil to drive the movable contact to be connected to or disconnected from the stationary contact.

2 . The circuit breaker according to claim 1 , wherein the movable coil and the movable contact are of a fixed connection structure, or
a linkage structure is disposed between the movable coil and the movable contact.

3 . The circuit breaker according to claim 2 , wherein the movable contact and the movable coil are connected by using an insulating substance comprising epoxy resin.

4 . The circuit breaker according to claim 3 , wherein a first conductive material is used for a wound coil of the movable coil, a second conductive material is used for a wound coil of the stationary coil, and a density of the first conductive material is less than a density of the second conductive material.

5 . The circuit breaker according to claim 1 , further comprising:
a solid-state switch circuit, wherein the solid-state switch circuit is connected in parallel to the mechanical switch circuit, when the circuit breaker is closed, the solid-state switch circuit is connected prior to the mechanical switch circuit, and when the circuit breaker is opened, the mechanical switch circuit is disconnected prior to the solid-state switch circuit.

6 . The circuit breaker according to claim 5 , wherein a first end of the solid-state switch circuit is connected to an anode of a first diode and a cathode of a second diode, and a second end of the solid-state switch circuit is connected to an anode of a third diode and a cathode of a fourth diode, a cathode of the first diode and a cathode of the third diode are connected to a first end of the switch transistor, and an anode of the second diode and an anode of the fourth diode are connected to a second end of the switch transistor.

7 . The circuit breaker according to claim 1 , wherein the movable coil is configured to:
when a current passing through the movable coil and the current passing through the stationary coil are in a same direction, move away from the stationary coil, and drive the movable contact to be disconnected from the stationary contact; and when the current passing through the movable coil and the current passing through the stationary coil are in the same direction, approach the stationary coil, and drive the movable contact to be connected to the stationary contact.

8 . The circuit breaker according to claim 1 , wherein the switch circuit comprises a first switch to a fourth switch, wherein
a first end of the drive module is connected to a first end of the first switch and a first end of the second switch, a second end of the first switch is connected to a first end of the stationary coil, a second end of the second switch is connected to a second end of the stationary coil, a first end of the third switch is connected to the first end of the stationary coil, a second end of the third switch is connected to a first end of the movable coil, a first end of the fourth switch is connected to the second end of the stationary coil, a second end of the fourth switch is connected to the first end of the movable coil, and a second end of the movable coil is connected to a second end of the drive module.

9 . The circuit breaker according to claim 8 , wherein,
when the first switch and the fourth switch are turned on, and the second switch and the third switch are turned off, a direction of the current passing through the movable coil is aligned with a direction of the current passing through the stationary coil, and the movable coil and the stationary coil attract each other, to drive the movable contact to be connected to the stationary contact.

10 . The circuit breaker according to claim 8 , wherein,
when the second switch and the third switch are turned on, and the first switch and the fourth switch are turned off, a direction of the current passing through the movable coil is opposite to a direction of the current passing through the stationary coil, and the movable coil and the stationary coil repel each other, to drive the movable contact to be disconnected from the stationary contact.

11 . The circuit breaker according to claim 1 , wherein the drive module further comprises:
an energy storage module configured to supply a current to the drive module.

12 . The circuit breaker according to claim 11 , wherein the energy storage module comprises:
a capacitor, a first end of the capacitor is configured to be connected to the first end of the drive module, and a second end of the capacitor is configured to be connected to the second end of the drive module.

13 . The circuit breaker according to claim 12 , wherein the energy storage module further comprises:
a diode, an anode of the diode is connected to the second end of the capacitor, and a cathode of the diode is connected to the first end of the capacitor.

14 . The circuit breaker according to claim 1 , wherein the movable coil and the stationary coil are connected in series with each other during operation.

15 . A power supply system, comprising:
power supply, circuit breaker and electrical equipment, wherein the circuit breaker is connected between the power supply and the electrical equipment, and, the circuit breaker, comprising a mechanical switch circuit, wherein the mechanical switch circuit comprises: a busbar; a power module, comprising a movable contact and a stationary contact, wherein the stationary contact is electrically connected to the busbar, the movable contact is movable, when the movable contact is connected to the stationary contact, the mechanical switch circuit is connected, and when the movable contact is disconnected from the stationary contact, the mechanical switch circuit is disconnected; and a drive module, comprising a switch circuit, a movable coil, and a stationary coil, wherein the movable coil and the stationary coil are disposed adjacently to form a single coil pair, the switch circuit is configured to control a current direction of the movable coil and a current direction of the stationary coil, and the movable coil and the stationary coil attract each other when the current direction of the movable coil is aligned with the current direction of the stationary coil, and repel each other when the current direction of the movable coil is opposite to the current direction of the stationary coil, to enable the movable coil to drive the movable contact to be connected to or disconnected from the stationary contact.

Assignees

• Huawei Digital Power Tech Co Ltd

Inventors

• Bissal Ara
• Zhao Fugao
• Wang Shuai

Classifications

• H01H73/04

  Contacts · CPC title

• H01H2009/544

  the static switching means being an insulated gate bipolar transistor, e.g. IGBT, Darlington configuration of FET and bipolar transistor · CPC title

• H01H2009/543

  third parallel branch comprising an energy absorber, e.g. MOV, PTC, Zener · CPC title

• H01H9/542

  Contacts shunted by static switch means · CPC title

• H01H33/285

  using electro-dynamic repulsion (assisting the movement of pistons by accelerating coil H01H33/882) · CPC title