CN211859583U

CN211859583U - Motor protection structure

Info

Publication number: CN211859583U
Application number: CN202020830277.8U
Authority: CN
Inventors: 张连青; 张浩宇; 耿英男
Original assignee: Tangshan Chengrui Intelligent Technology Co ltd
Current assignee: Tangshan Chengrui Intelligent Technology Co ltd
Priority date: 2020-05-14
Filing date: 2020-05-14
Publication date: 2020-11-03
Anticipated expiration: 2030-05-14

Abstract

The utility model discloses a motor protection architecture, it relates to motor technical field. The soft starter comprises a current transformer, an open-phase protector, a controller, a breaker and a soft starter, wherein the current transformer is arranged on the outlet side of the soft starter, the current transformer is connected with the open-phase protector, the open-phase protector is connected with the breaker through the controller, and the breaker is connected to the inlet side of the soft starter. The utility model discloses can protect electrical equipment and starting drive to suffer destruction, improve the power supply reliability, application prospect is wide.

Description

Motor protection structure

Technical Field

The utility model relates to a motor technical field, concretely relates to motor protection architecture.

Background

At present, the starting of a motor in alternating current and direct current power supply is roughly divided into variable frequency starting, direct starting, soft starting and the like, wherein the soft starting is a main starting method at present, and when the motor is started, the soft starting enables the starting current of the motor to be increased to a set value from a zero line through gradually increasing the conduction angle of a thyristor, so that the soft starting has no impact on the motor, the motor is started stably, the impact torque on a load machine is reduced, and the service life of the motor is prolonged. However, in the working process of soft start, if the power is blocked due to short circuit, phase failure or sudden change of load of the motor, the motor and soft start equipment can be burnt due to instantaneous increase of current, and because the designed program has time current-limiting protection during starting, the protection function cannot identify working faults in time, sudden current increase, the equipment does not give a protection prompt value, a thyristor is burnt, the motor equipment and the start equipment are burnt, and the loss is serious. Based on this, it is especially necessary to design a new type of motor protection structure.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a motor protection structure, simple structure, reasonable in design can protect electrical equipment and starting drive to suffer destruction, improves the reliability of supplying power, and the practicality is strong, easily uses widely.

In order to achieve the above purpose, the present invention is realized by the following technical solution: a motor protection structure comprises a current transformer, an open-phase protector, a controller, a breaker and a soft starter, wherein the current transformer is arranged on the outgoing line side of the soft starter, the current transformer is connected with the open-phase protector, the open-phase protector is connected with the breaker through the controller, and the breaker is connected to the incoming line side of the soft starter.

Preferably, the current transformer is matched with the motor equipment.

The utility model has the advantages that: the device can protect the motor equipment and the starting equipment, reduces the loss caused by short circuit of the motor, has strong practicability, greatly improves the power supply reliability and has wide application prospect.

Drawings

The present invention will be described in detail with reference to the accompanying drawings and specific embodiments;

fig. 1 is a block diagram of the present invention.

Detailed Description

In order to make the technical means, creation features, achievement purposes and functions of the present invention easy to understand, the present invention is further described below with reference to the following embodiments.

Referring to fig. 1, the following technical solutions are adopted in the present embodiment: the utility model provides a motor protection structure, includes current transformer 1, open-phase protector 2, controller 3, circuit breaker 4, soft starter 5, current transformer 1 installs the side of being qualified for the next round of competitions at soft starter 5, current transformer 1 and electrical equipment phase-match, current transformer 1 is connected with open-phase protector 2, open-phase protector 2 links to each other with circuit breaker 4 through controller 3, circuit breaker 4 connects to the side of being qualified for the next round of competitions of soft starter 5.

The specific embodiment is improved on the basis of the existing motor protection circuit, when the motor equipment is normally started, the starting current is 2-3 times of the normal current, and at the moment, the protection function is normally operated; if the short circuit of the motor occurs, the load suddenly changes, the current is increased instantly, the current transformer 1 matched with the motor equipment is additionally arranged on the wire outlet side of the soft starter 5, the current transformer 1 is connected with the open-phase protector 2 of the motor, the open-phase protector 2 of the motor is controlled by the change of the current in the current transformer, the open-phase protector 2 sends an instruction, and the air circuit breaker 4 above the soft starter 5 is controlled and cut off by the controller 3, so that the protection effect of automatic power-off of the equipment due to the blocked current short circuit is achieved. The equipment protection device can effectively reduce the damage of the motor short circuit to the electrical equipment and the starting equipment in the soft starting process of the motor, reduce the loss, improve the power supply safety and reliability, and has wide market application prospect.

The basic principles and the main features of the invention and the advantages of the invention have been shown and described above. It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the foregoing embodiments and descriptions are provided only to illustrate the principles of the present invention without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. The utility model provides a motor protection architecture, its characterized in that, including current transformer (1), open-phase protector (2), controller (3), circuit breaker (4), soft starter (5), the outgoing line side at soft starter (5) is installed in current transformer (1), current transformer (1) is connected with open-phase protector (2), open-phase protector (2) link to each other with circuit breaker (4) through controller (3), circuit breaker (4) connect to the incoming line side of soft starter (5).

2. A motor protection arrangement according to claim 1, characterized in that said current transformer (1) is adapted to the electrical machine.