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Actuators for medium voltage circuit breakers

A technology for actuators and circuit breakers, which is applied to high-voltage air circuit breakers, power devices and circuits inside switches to reduce costs, eliminate demand, and improve reliability.

Active Publication Date: 2022-07-15
ABB (SCHWEIZ) AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The challenges with electromagnetic actuators are primarily: cost (competing with low-cost springs); high torque requirements in a compact size (competing with very high spring force densities); robustness (requiring electronics for controlled operation); and Modularity (current spring-operated actuators can be installed / removed with minimal disassembly of the circuit breaker

Method used

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  • Actuators for medium voltage circuit breakers
  • Actuators for medium voltage circuit breakers
  • Actuators for medium voltage circuit breakers

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0049] Figure 1 to Figure 4 Actuators for medium voltage circuit breakers as provided herein and how they operate with medium voltage circuit breakers are shown.

[0050] These figures show actuators for medium voltage circuit breakers. The actuator includes a rotor, a stator, and at least one coil. The stator is configured to be fixedly mounted to the main shaft of the circuit breaker of the medium voltage switchgear such that the rotor and main shaft rotate together. The stator is configured to be mounted at least partially around the rotor. At least one coil is wound around at least a portion of the stator. The rotation angle of the rotor relative to the stator is limited.

[0051] According to an example, the rotational angle of the rotor relative to the stator is limited by the driving electromagnetic force.

[0052] In an example, the angle of rotation of the rotor is limited to less than one full circumference around the axis of the main shaft.

[0053] According t...

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Abstract

The present invention relates to an actuator for medium voltage circuit breakers. The actuator includes a rotor, a stator, and at least one coil. The rotor is configured to be fixedly mounted to the main shaft of the circuit breaker of the medium voltage switchgear such that the rotor and main shaft rotate together. The stator is configured to be mounted at least partially around the rotor. At least one coil is wound around at least a portion of the stator. The rotation angle of the rotor relative to the stator is limited.

Description

technical field [0001] The present invention relates to an actuator for a medium voltage circuit breaker and to a medium voltage circuit breaker having such an actuator. Background technique [0002] Traditional medium voltage switchgear solutions use load springs for opening and closing operations. However, this opening and closing behavior was not affected after assembly. Replacing the spring for the closing operation by an electromagnetic actuator allows the closing operation to be controlled by means of current control. In distribution networks with voltage classes between 10kV and 30kV, each distribution circuit is provided with a medium voltage switch that performs maintenance work in the event of a short circuit or overload or in the closed environment of the circuit will be disconnected. The breaking operation is usually accomplished by separating the contact of the two poles within the vacuum chamber, thereby causing ignition of the vacuum arc carrying the arc cu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01H3/28H01H33/666
CPCH01H3/28H01H33/666H02K26/00H01H33/6662
Inventor T·申德勒E·莫雷利M·布克A·特苏茨S·布赖奇T·施塔尔H·罗伊特纳尔C·尼奇G·梅希勒
Owner ABB (SCHWEIZ) AG