Interlocking and self-locking circuit of three-phase motor
By designing a three-way motor interlocking and self-locking circuit containing specific circuit components, the complex problem of power line and AC contactor lines in the prior art is solved, and the coordinated operation of the three-way motors and a simple wiring method are realized.
Patent Information
- Application Number
- CN202421011153.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-11
- Publication Date
- 2025-01-03
- Estimated Expiration
- 2034-05-11
AI Technical Summary
The lack of effective three-digit motor interlocking and self-locking circuits in the prior art leads to complex power lines and complex AC contactor lines, making it impossible to achieve coordinated operation of the three-digit motors.
A three-item motor interlocking and self-locking circuit including specific circuit components is designed, and the interlocking and self-locking connection is made through the interlocking and self-locking connection of components such as line L1, normally closed contact FR, push-button switch SB1-5, auxiliary contact KM1-6, etc. , simplifies the layout of power cords and AC contactor lines.
The three motor interlocking and self-locking are realized, saving the circuit complexity on the power cord and AC contactor, simplifying the wiring method, and improving the simplicity and reliability of the system.
Smart Images
Figure CN222301658U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of circuit connection methods, in particular to an interlocking and self-locking circuit of a three-phase motor. Background Art
[0002] Three-phase motor interlocking and self-locking is an automation technology, and its background can be traced back to the development of electrical control systems. In industrial production, it is often necessary to control multiple motors to run or stop at the same time, and there is a mutual influence relationship between these motors, such as motor B can only start running after motor A stops running. Therefore, a way is needed to achieve coordinated operation between motors. In this context, three-phase motor interlocking and self-locking technology came into being. It can enable multiple motors to achieve mutual influence and coordinated operation through circuit design and control logic. For example, when motor A starts running, the circuit can automatically turn off the power supply of motors B and C to prevent them from running out of sync. Similarly, when motor B stops running, the circuit can automatically control the start and stop of motor C to prevent it from starting when motor B is not stopped. Three-phase motor interlocking and self-locking technology has the advantages of simplicity, safety, reliability, and energy saving, and is widely used in various industrial occasions.
[0003] However, there are few interlocking and self-locking circuits for three-phase motors on the market, or the existing related technologies have certain defects, such as the inability to achieve interlocking and self-locking of the three-phase motors, complex power lines, and complex lines on the AC contactor. Utility Model Content
[0004] The purpose of the utility model is to overcome the above technical defects, provide an interlocking and self-locking circuit for three-phase motors, and solve the problems that the interlocking and self-locking of the three-phase motors cannot be achieved, the power lines are complicated, and the lines on the AC contactor are complicated.
[0005] In order to solve the above technical problems, the technical solution provided by the utility model is: an interlocking and self-locking circuit of a three-phase motor, including a circuit L1, a normally closed contact FR, a normally closed push button switch SB1, a normally open push button switch SB2, a normally open push button switch SB3, a normally closed auxiliary contact KM1, a coil operating device KM2, a normally open auxiliary contact KM3, a normally closed push button switch SB4, a normally closed auxiliary contact KM4, a normally open auxiliary contact KM5, a normally closed push button switch SB5, a coil operating device KM6 and a circuit N, wherein the normally closed push button switch SB1, the normally open push button switch SB2, the normally open push button switch SB3, the normally closed auxiliary contact KM1, the coil operating device KM2, the normally open auxiliary contact KM3, the normally closed push button switch SB4, the normally closed auxiliary contact KM4, the normally open auxiliary contact KM5, the normally closed push button switch SB5 and the coil operating device KM6 are connected in an interlocking and self-locking manner.
[0006] Furthermore, the line L1 is connected to a normally closed contact FR, and the other end of the normally closed contact FR is connected in series with a normally closed button switch SB1, a normally open button switch SB2, and a normally open button switch SB3. The normally closed button switch SB1, the normally open button switch SB2, and the normally open button switch SB3 are connected in parallel, and the normally open button switch SB3 is connected in series with a normally closed auxiliary contact KM1 at the other end, and the other end of the normally closed auxiliary contact KM1 is connected in series with a coil operating device KM2 and a normally open auxiliary contact KM3, and the coil operating device KM2 is connected to the line N.
[0007] Furthermore, one end of the normally open push button switch SB2 is connected in series with the normally closed contact FR, and the other end is connected in series with the normally closed auxiliary contact KM4. The other end of the normally closed auxiliary contact KM4 is connected in series with the normally open auxiliary contact KM3 and the normally open auxiliary contact KM5. The KM5 is connected in series with the normally closed push button switch SB4.
[0008] Furthermore, the normally closed button switch SB1 is connected in series with the normally closed button switch SB4 and the normally closed button switch SB5, and the normally closed button switch SB5 is connected in series with the normally open auxiliary contact KM3.
[0009] Furthermore, one end of the coil operating device KM6 is connected in series with the normally open auxiliary contact KM3 and the normally closed auxiliary contact KM4, and the other end is connected to the line N.
[0010] Furthermore, the coil operating device KM2 and the coil operating device KM6 are connected in parallel.
[0011] The advantage of the utility model compared with the prior art is that the advantage of this circuit is that after the wires are connected in series on the switch, the interlocking and self-locking of the three motors can be achieved, one power line can be saved, and the wires on the AC contactor do not need to be so complicated, which is relatively simple compared to the previous wiring method. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] Figure 1 The utility model is a circuit structure schematic diagram of an interlocking and self-locking circuit of a three-phase motor.
[0013] Figure 2 The utility model is a schematic diagram of the structure of an interlocking and self-locking circuit of a three-phase motor. DETAILED DESCRIPTION
[0014] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.
[0015] In the description of the embodiments of the present utility model, it should be noted that if the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate an orientation or position relationship based on the orientation or position relationship shown in the accompanying drawings, or the orientation or position relationship in which the utility model product is usually placed when in use, it is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.
[0016] In addition, the terms "horizontal", "vertical", "overhanging" and the like do not mean that the components must be absolutely horizontal or overhanging, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.
[0017] In the description of the embodiments of the present invention, "multiple" means at least 2.
[0018] In the description of the embodiments of the present utility model, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.
[0019] Example:
[0020] Line L1 is connected to a normally closed contact FR, and the other end of the normally closed contact FR is connected in series with a normally closed button switch SB1, a normally open button switch SB2, and a normally open button switch SB3. The normally closed button switch SB1, the normally open button switch SB2, and the normally open button switch SB3 are connected in parallel, and the normally open button switch SB3 is connected in series with a normally closed auxiliary contact KM1 at the other end, and the normally closed auxiliary contact KM1 is connected in series with a coil operating device KM2 and a normally open auxiliary contact KM3 at the other end, and the coil operating device KM2 is connected to line N.
[0021] One end of the normally open push button switch SB2 is connected in series with the normally closed contact FR, and the other end is connected in series with the normally closed auxiliary contact KM4. The other end of the normally closed auxiliary contact KM4 is connected in series with the normally open auxiliary contact KM3 and the normally open auxiliary contact KM5. The KM5 is connected in series with the normally closed push button switch SB4.
[0022] The normally closed button switch SB1 is connected in series with the normally closed button switch SB4 and the normally closed button switch SB5, and the normally closed button switch SB5 is connected in series with the normally open auxiliary contact KM3.
[0023] One end of the coil operating device KM6 is connected in series with the normally open auxiliary contact KM3 and the normally closed auxiliary contact KM4, and the other end is connected to the line N.
[0024] The coil operating device KM2 and the coil operating device KM6 are connected in parallel.
[0025] In specific implementation, when the normally closed button switch SB1, the normally closed button switch SB4, and the normally closed button switch SB5 are all in the closed state, the normally open button switch SB2, the normally open button switch SB3, and the normally closed auxiliary contact KM1 will be closed, the line L1 will be connected to the load, and the line N will be connected to the coil operating device KM2 and the normally open auxiliary contact KM3, so as to achieve normal operation of the load.
[0026] However, when external interference or circuit abnormality causes any one or more of the normally closed push button switches SB1, SB4, and SB5 to open, the normally closed auxiliary contact KM1 will be closed, and the coil operating device KM2 and the normally open auxiliary contact KM3 will be disconnected, causing line L1 to be disconnected from the load, thereby achieving power-off protection for the load.
[0027] At the same time, when the normally closed push button switch SB4 is disconnected, the normally open auxiliary contact KM3 is connected in series with the normally closed push button switch SB5, the coil operating device KM6, etc., the normally closed auxiliary contact KM4 will be closed, and the coil operating device KM6 will be disconnected, realizing secondary protection of the load.
[0028] The above description of the utility model and its implementation methods is not restrictive. The drawings show only one implementation method of the utility model, and the actual structure is not limited thereto. In short, if ordinary technicians in this field are inspired by it and design structural methods and embodiments similar to the technical solution without creativity without departing from the purpose of the invention of the utility model, they should all fall within the protection scope of the utility model.
Claims
1. An interlocking and self-locking circuit for three motors, comprising a circuit L1, a normally closed contact FR, a normally closed push button switch SB1, a normally open push button switch SB2, a normally open push button switch SB3, a normally closed auxiliary contact KM1, a coil operating device KM2, a normally open auxiliary contact KM3, a normally closed push button switch SB4, a normally closed auxiliary contact KM4, a normally open auxiliary contact KM5, a normally closed push button switch SB5, a coil operating device KM6 and a circuit N, characterized in that: The normally closed button switch SB1, normally open button switch SB2, normally open button switch SB3, normally closed auxiliary contact KM1, coil operating device KM2, normally open auxiliary contact KM3, normally closed button switch SB4, normally closed auxiliary contact KM4, normally open auxiliary contact KM5, normally closed button switch SB5 and coil operating device KM6 are connected by interlocking and self-locking.
2. The interlocking and self-locking circuit of a three-phase motor according to claim 1, characterized in that: The line L1 is connected to a normally closed contact FR, and the other end of the normally closed contact FR is connected in series with a normally closed button switch SB1, a normally open button switch SB2, and a normally open button switch SB3. The normally closed button switch SB1, the normally open button switch SB2, and the normally open button switch SB3 are connected in parallel, and the normally open button switch SB3 is connected in series with a normally closed auxiliary contact KM1 at the other end, and the other end of the normally closed auxiliary contact KM1 is connected in series with a coil operating device KM2 and a normally open auxiliary contact KM3, and the coil operating device KM2 is connected to the line N.
3. The interlocking and self-locking circuit of a three-phase motor according to claim 1, characterized in that: One end of the normally open push button switch SB2 is connected in series with the normally closed contact FR, and the other end is connected in series with the normally closed auxiliary contact KM4. The other end of the normally closed auxiliary contact KM4 is connected in series with the normally open auxiliary contact KM3 and the normally open auxiliary contact KM5. The KM5 is connected in series with the normally closed push button switch SB4.
4. The interlocking and self-locking circuit of a three-phase motor according to claim 1, characterized in that: The normally closed button switch SB1 is connected in series with the normally closed button switch SB4 and the normally closed button switch SB5, and the normally closed button switch SB5 is connected in series with the normally open auxiliary contact KM3.
5. The interlocking and self-locking circuit of a three-phase motor according to claim 1, characterized in that: One end of the coil operating device KM6 is connected in series with the normally open auxiliary contact KM3 and the normally closed auxiliary contact KM4, and the other end is connected to the line N.
6. The interlocking and self-locking circuit of a three-phase motor according to claim 4, characterized in that: The coil operating device KM2 and the coil operating device KM6 are connected in parallel.