Digital miniature circuit breaker capable of automatically opening and closing

A miniature circuit breaker, opening and closing technology, applied in the electrical field, can solve the problems of limited breaking capacity, unsatisfactory rated current, occupying space, etc., and achieve the effect of large miniaturization, large practical value, and cost reduction.

CN113178364AInactive Publication Date: 2021-07-27苏州泰立得智能科技有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2021-07-27
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a digital miniature circuit breaker capable of automatically opening and closing. The digital miniature circuit breaker comprises a main loop, a detection unit, a control module, an opening and closing coil control unit, an action unit and an execution mechanism. The action unit comprises an opening and closing coil and a movable iron core, the opening and closing coil is connected with current through an opening and closing coil control unit, and the movable iron core is in transmission connection with the execution mechanism; the detection unit is electrically connected with the control module, the output end of the control module is electrically connected with the opening and closing coil control unit, and the opening and closing coil control unit changes the flow direction of current flowing through the opening and closing coil according to received control signals of the control module and drives the movable iron core to drive the executing mechanism to be opened or closed. According to the miniature circuit breaker, an electric operation module does not need to be introduced, automatic switching-on and switching-off functions can be achieved through a single coil, the miniature circuit breaker has a large current range while product miniaturization is kept, automatic switching-on and switching-off control is achieved for the first time within the width of 18 mm, the full range of 1-128A is supported, remote control can be achieved, and the miniature circuit breaker has great practical value.
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Description

technical field

[0001] The present invention relates to the electrical field, in particular to a circuit breaker. Background technique

[0002] A circuit breaker is an electrical device used to control and protect circuits. It can automatically open and cut off the circuit when the circuit fails.

[0003] In the prior art, since the miniature circuit breaker itself cannot realize the automatic closing function, it must rely on an additional electrical operation module to realize the closing function, regardless of whether the electrical operation module is selected to be located outside the miniature circuit breaker, or connected to the miniature Circuit breakers are combined, and each miniature circuit breaker needs to be equipped with corresponding electrical operation modules one-to-one, which is uneconomical in terms of equipment power consumption and production cost.

[0004] At the same time, the size of most miniature circuit breakers with electric operation modules ...

Examples

Embodiment 1

[0037] Such as figure 1 , figure 2 As shown, a digital miniature circuit breaker that can automatically open and close is provided, including a main circuit 1, a detection unit 2, a control module 3, an opening and closing coil control unit 4, an action unit 5, and an actuator 6. The main There is a load in circuit 1;

[0038] Wherein said action unit 5 comprises opening and closing coil 51 and moving iron core 52, and described opening and closing coil 51 is the magnetic flux valve coil, and is a single coil, and described moving iron core 52 is a kind of magnet, as figure 2 As shown, the opening and closing coil 51 is sleeved on the outside of the moving iron core 52, and the opening and closing coil 51 receives current through the opening and closing coil control unit 4, and the moving iron core 52 and the moving iron core 52 The actuator 6 is connected by transmission; when the opening and closing coil 51 is supplied with current, the opening and closing coil 51 will g...

Embodiment 2

[0057] Such as image 3 The difference between the illustrated second embodiment and the first embodiment is that the main circuit 1 is provided with a short-circuit electromagnetic tripping coil 7, and when the circuit is overloaded, the tunnel magnetoresistive sensor 21 detects an overload current, and the The control module 3 sends a tripping signal to the opening and closing coil control unit 4 to realize the opening, and when a short-circuit current is generated, the short-circuit electromagnetic tripping coil 7 generates magnetic force to drive the actuator 6 to complete the opening action; That is to say, in this embodiment, through the double-coil structure of the short-circuit electromagnetic tripping coil 7 and the opening and closing coil 51 , the responses to the short-circuit and overload situations are respectively realized.

[0058] The short-circuit electromagnetic tripping coil 7 is directly connected with the current on the main circuit 1. When a short-circui...