CN217522704U

CN217522704U - Positioning system of common alternating current motor

Info

Publication number: CN217522704U
Application number: CN202220123433.6U
Authority: CN
Inventors: 于艳伟; 夏海涛; 尚宝刚; 孙雪松; 梁起会; 胡森; 王东; 王志勇
Original assignee: Dandong Tianke Ray Instrument Co ltd
Current assignee: Dandong Tianke Ray Instrument Co ltd
Priority date: 2022-01-18
Filing date: 2022-01-18
Publication date: 2022-09-30
Anticipated expiration: 2032-01-18

Abstract

The utility model discloses a positioning system of a common alternating current motor, relating to the technical field of positioning of common alternating current motors, the utility model comprises an alternating current motor, wherein an output shaft of the alternating current motor is connected with a load lead screw, and the other end of the load lead screw is connected with an encoder; the encoder is electrically connected with a PLC (programmable logic controller) for controlling the alternating current motor, and the PLC controls the alternating current motor based on signals of the encoder. The stop position of the alternating current motor can be controlled through continuous feedback, the positioning problem caused by inertia is effectively avoided, the moving precision of linear motion converted by rotation of the lead screw can be controlled below 0.5mm, the requirement of the existing radiographic inspection equipment is met, and low cost can be achieved.

Description

Positioning system of common alternating current motor

Technical Field

The utility model relates to a technical field of ordinary alternating current motor location specifically is an ordinary alternating current motor's positioning system.

Background

For a common alternating current motor, when a positioning request is made, for example, for a radiographic inspection detection device, the conventional method is to set a positioning switch at a positioning point that needs to be stopped, and stop the motor immediately when a control system detects the action of the positioning switch, but because the inertia of the rotor of the motor cannot be stopped immediately, the positioning accuracy is generally not high. If a servo motor is used, the cost is too high. Although there is a demand for positioning accuracy, it is obvious that high accuracy of the servo motor is not required, which results in wasted performance. The present patent therefore aims to address the above problems by proposing a solution with a positioning accuracy higher than that of the conventional positioning method, but less costly than that of a servomotor.

SUMMERY OF THE UTILITY MODEL

The utility model provides a positioning system of a common alternating current motor, which comprises an alternating current motor, wherein an output shaft of the alternating current motor is connected with a load lead screw, and the other end of the load lead screw is connected with an encoder; the encoder is electrically connected with a PLC (programmable logic controller) for controlling the alternating current motor, and the PLC controls the alternating current motor based on signals of the encoder.

The utility model discloses a further set up to: the PLC controls the alternating current motor through the frequency converter.

The utility model has the advantages that:

the stop position of the alternating current motor can be controlled through continuous feedback, the positioning problem caused by inertia is effectively avoided, the moving precision of linear motion converted by rotation of the lead screw can be controlled below 0.5mm, the requirement of the existing radiographic inspection equipment is met, and low cost can be achieved.

Drawings

Fig. 1 shows a connection diagram for signal transmission in the present invention;

fig. 2 shows a schematic diagram of a connection structure between the ac motor and the encoder in the present invention.

Reference numerals: 1. an alternating current motor; 2. an encoder; 3. a PLC; 4. a frequency converter; 5. and loading the lead screw.

Detailed Description

Preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only for explaining the technical principle of the present invention, and are not intended to limit the scope of the present invention.

Referring to fig. 1 and 2, the utility model provides a positioning system of ordinary alternating current motor, including alternating current motor 1, alternating current motor 1's output shaft load lead screw 5, two sections of lead screw are equipped with the bearing frame, and load lead screw 5's the other end passes through retarder connection encoder 2. The load screw 5 is a structural member for driving the device to move in the radiographic inspection equipment and is driven to rotate by the alternating current motor 1. Encoder 2 is connected with the PLC3 electricity that is used for controlling AC motor 1, and encoder 2 can generate corresponding signal of telecommunication based on the angular displacement, and PLC3 is based on encoder 2's signal control AC motor 1, specifically PLC3 passes through converter 4 control AC motor 1, and converter 4 can improve PLC 3's control effect.

After the whole device is operated, the stop position of the alternating current motor 1 can be controlled through continuous feedback, the positioning problem caused by inertia is effectively avoided, the moving precision of linear motion converted by rotation of the lead screw can be controlled below 0.5mm, the requirement of the existing radiographic inspection equipment is met, and the device is different from a servo motor. In the prior art, the control precision of a servo motor with excellent performance can reach 0.01mm, and the servo motor is wasted in performance and higher in cost.

While the invention has been described with reference to a preferred embodiment, various modifications may be made and equivalents may be substituted for elements thereof without departing from the scope of the invention, and particularly, various features shown in the various embodiments may be combined in any combination as long as there is no structural conflict. The present invention is not limited to the particular embodiments disclosed herein, but encompasses all technical solutions falling within the scope of the claims.

In the description of the present invention, the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like, which indicate directions or positional relationships, are based on the directions or positional relationships shown in the drawings, which are merely for convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

Furthermore, it should be noted that, unless otherwise explicitly stated or limited in the description of the present invention, the terms "mounted," "connected" and "connected" are to be construed broadly and may be, for example, fixedly connected, detachably connected or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

The terms "comprises," "comprising," or any other similar term are intended to cover a non-exclusive inclusion, such that a process, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, article, or apparatus.

So far, the technical solution of the present invention has been described with reference to the preferred embodiments shown in the drawings, but it is easily understood by those skilled in the art that the scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, a person skilled in the art can make equivalent changes or substitutions to the related technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.

Claims

1. A positioning system of a common alternating current motor is characterized in that: the device comprises an alternating current motor (1), wherein an output shaft of the alternating current motor (1) is connected with a load lead screw (5), and the other end of the load lead screw (5) is connected with an encoder (2); the encoder (2) is electrically connected with a PLC (3) used for controlling the alternating current motor (1), and the PLC (3) controls the alternating current motor (1) based on a signal of the encoder (2).

2. A positioning system for a conventional ac motor according to claim 1, wherein: the PLC (3) controls the alternating current motor (1) through the frequency converter (4).