CN109951048A - A long primary permanent magnet linear synchronous motor position signal detection device - Google Patents

Abstract

The invention provides a position signal detection device of a long primary permanent magnet linear synchronous motor, which belongs to the field of motors. The present invention is a long-primary permanent magnet linear synchronous motor position signal detection device. The mover is composed of a conductive core and a permanent magnet. The stator is composed of several linear Hall sensor components arranged at equal distances. The linear Hall sensor components are connected with the controller. , the mover composed of a magnetic core and a permanent magnet is installed on one side of the linear motor mover, the stator composed of several equidistant linear Hall sensor assemblies and the linear motor stator are installed on the base, and the permanent magnets are surface-mounted On the lower surface of the conductive magnet core, the lower surface of the permanent magnet is arc-shaped, and the adjacent permanent magnets have opposite polarities. The invention realizes the cable-free movement of the mover, improves the running speed and positioning accuracy of the linear motor system, and simultaneously adopts the linear Hall sensor to detect the position signal, thereby saving the system cost.

Description

A long primary permanent magnet linear synchronous motor position signal detection device

technical field

The invention relates to a position signal detection device of a long primary permanent magnet linear synchronous motor, which belongs to the field of motors.

Background technique

Long primary permanent magnet linear motor synchronous motor has the advantages of small mover mass and good reliability, and can comprehensively consider factors such as efficiency, controllability and safety life cycle, and adopts modular and standardized design. with broadly application foreground. However, at present, the motor still adopts the traditional position detection method of reading head plus grating ruler or magnetic grating ruler, which is costly, and the reading head is installed on the motor mover side, which has the problem of drag and disturbance of the position signal transmission line, which limits the long primary permanent Further improvements in operating speed and positioning accuracy of the magnetic linear synchronous motor system.

SUMMARY OF THE INVENTION

The purpose of the present invention is to solve the above problems existing in the prior art, and further provide a position signal detection device for a long primary permanent magnet linear synchronous motor.

The purpose of this invention is to realize through the following technical solutions:

A long primary permanent magnet linear synchronous motor position signal detection device, the long primary permanent permanent magnet linear synchronous motor position signal detection device comprises a mover, a stator, a base and a controller, and the mover is composed of a conductive magnet core and a permanent magnet, The stator is composed of several linear Hall sensor components arranged at equal distances. The linear Hall sensor components are connected to the controller. The mover composed of a magnetic core and a permanent magnet is installed on one side of the linear motor mover. The stator composed of the arrayed linear Hall sensor components and the linear motor stator are installed on the base, the permanent magnets are attached to the lower surface of the conductive magnet core, the lower surface of the permanent magnets is arc-shaped, and the adjacent permanent magnets have opposite polarities.

The present invention is a long-primary permanent magnet linear synchronous motor position signal detection device. The longitudinal length of the linear Hall sensor assembly is half of the pole pitch of the permanent magnet, and the distance between adjacent linear Hall sensor assemblies is smaller than the longitudinal length of the mover. .

The present invention is a long primary permanent magnet linear synchronous motor position signal detection device, wherein the linear Hall sensor assembly is provided with a signal lamp to display its working state.

The present invention is a long primary permanent magnet linear synchronous motor position signal detection device. Metal shielding casings are installed on both ends and the upper surface of the mover composed of a conductive magnetic core and a permanent magnet.

The present invention is a long-primary permanent magnet linear synchronous motor position signal detection device. An adapter plate is arranged between the mover and the linear motor mover.

The present invention is a long-primary permanent magnet linear synchronous motor position signal detection device, which adopts a linear Hall sensor to detect the position signal, replaces the magnetic grating ruler or the grating ruler in the existing device, and greatly reduces the cost; The sub-wire moves without cables, which improves the running speed and positioning accuracy of the linear motor system.

Description of drawings

FIG. 1 is a schematic diagram of a position signal detection device of a long primary permanent magnet linear synchronous motor according to the present invention.

FIG. 2 is a right side view of the linear Hall sensor assembly of the present invention.

The reference numerals in the figure are: 1 is a conductive magnetic core; 2 is a permanent magnet; 3 is a linear Hall sensor assembly; 4 is a base; 5 is a linear Hall sensor.

Detailed ways

The present invention will be further described in detail below with reference to the accompanying drawings: the present embodiment is implemented on the premise of the technical solution of the present invention, and provides a detailed implementation manner, but the protection scope of the present invention is not limited to the following embodiments.

Embodiment 1: As shown in Figures 1 and 2, a long-primary permanent magnet linear synchronous motor position signal detection device involved in this embodiment includes a mover, a stator, a base and a controller. It is composed of permanent magnets. The stator is composed of several linear Hall sensor components arranged at equal distances. The linear Hall sensor components are connected to the controller. The stator composed of several equidistant linear Hall sensor assemblies and the linear motor stator are installed on the base, the permanent magnets are attached to the lower surface of the conductive magnet core, the lower surface of the permanent magnets is arc-shaped, and the polarity of the adjacent permanent magnets is on the contrary.

The surface of the permanent magnet is attached to the lower surface of the conductive magnet core, and the lower surface of the permanent magnet is arc-shaped, so as to improve the sine degree of the air gap magnetic density generated by the permanent magnet. Adjacent permanent magnets have opposite polarities, and the N poles and S poles are alternately arranged.

Four linear Hall sensors are arranged at equal intervals in the linear Hall component, which are used to detect the vector direction of the magnetic induction intensity generated by the permanent magnet, and output the corresponding voltage signal. Each linear Hall sensor outputs a state value of 0 or 1 by measuring the vector direction of the magnetic induction intensity at its location. During the movement of the linear motor mover, the mover of the position signal detection device moves along with it, and the state value output by each linear Hall sensor changes constantly. Movement direction and relative displacement of the child.

Embodiment 2: As shown in FIG. 2, the present embodiment relates to a long-primary permanent magnet linear synchronous motor position signal detection device, the longitudinal length of the linear Hall sensor assembly is half of the permanent magnet pole pitch, The distance between adjacent linear Hall sensor assemblies is less than the longitudinal length of the mover.

Embodiment 3: As shown in FIG. 2 , in a long-primary permanent magnet linear synchronous motor position signal detection device involved in this embodiment, the linear Hall sensor assembly is provided with a signal lamp to display its working state.

The linear hall sensor assembly is provided with a signal light to display its working state. When the mover moves in the area above the linear hall sensor assembly, the signal light is on, and when the mover leaves the area above the linear hall sensor assembly, the signal light is off.

Embodiment 4: As shown in FIG. 1 , in the position signal detection device of a long primary permanent magnet linear synchronous motor involved in this embodiment, the two ends and the upper surface of the mover composed of a conductive magnetic core and a permanent magnet are installed with Metal shielded enclosure.

Metal shielding shells are installed on both ends and the upper surface of the mover to shield electromagnetic interference.

Embodiment 5: As shown in FIG. 1 , in a long-primary permanent magnet linear synchronous motor position signal detection device involved in this embodiment, an adapter plate is arranged between the mover and the linear motor mover.

An adapter plate is arranged between the mover and the linear motor mover to adjust the air gap width between the mover and the stator of the position signal detection device (the optimal value of the air gap width between the mover and the stator of the position signal detection device is 4mm-6mm).

The above are only preferred specific embodiments of the present invention, and these specific embodiments are based on different implementations under the overall concept of the present invention, and the protection scope of the present invention is not limited to this, any person familiar with the technical field Changes or substitutions that can be easily conceived by a skilled person within the technical scope disclosed by the present invention shall be included within the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims (5)

1. a kind of long primary permanent magnet linear synchronous generator position signal detection device, which is characterized in that the long primary permanent magnet is straight Line locking motor position signal detection device includes mover, stator, pedestal (4) and controller, and mover is by conducting magnet core (1) and forever Magnet (2) composition, stator are made of the linear hall sensor component (3) of several equidistant arrangements, linear hall sensor group Part (3) is connect with controller, is mounted on linear motor rotor side by the mover that conducting magnet core (1) and permanent magnet (2) are constituted, by The stator and linear motor stator electric that the linear hall sensor component (3) of several equidistant arrangements is constituted are mounted on pedestal (4), Permanent magnet (2) Surface Mount is arc in conducting magnet core (1) lower surface, permanent magnet (2) lower surface, and adjacent permanent magnet (2) polarity is opposite.

2. long primary permanent magnet linear synchronous generator position signal detection device according to claim 1, which is characterized in that institute The longitudinal length for stating linear hall sensor component (3) is the half of permanent magnet (2) pole span, adjacent linear hall sensor component (3) distance is less than mover longitudinal length.

3. long primary permanent magnet linear synchronous generator position signal detection device according to claim 1, which is characterized in that institute It states linear hall sensor component (3) and is provided with the signal lamp for showing its working condition.

4. long primary permanent magnet linear synchronous generator position signal detection device according to claim 1, which is characterized in that institute It states the mover both ends being made of conducting magnet core (1) and permanent magnet (2) and upper surface is equipped with Metal shielding shell.

5. long primary permanent magnet linear synchronous generator position signal detection device according to claim 1, which is characterized in that institute It states and is provided with pinboard between mover and linear motor rotor.