CN212305038U

CN212305038U - Motor rotation detection mechanism with encoder function and circuit thereof

Info

Publication number: CN212305038U
Application number: CN202021001762.0U
Authority: CN
Inventors: 王志清; 陈春森; 马辉; 陈德
Original assignee: Xiamen Dashou Controls Technology Co ltd
Current assignee: Xiamen Dashou Controls Technology Co ltd
Priority date: 2020-06-04
Filing date: 2020-06-04
Publication date: 2021-01-05
Anticipated expiration: 2030-06-04

Abstract

The utility model provides a motor rotation detection mechanism with encoder function, include: a plurality of motor rotor magnetic poles which are uniformly distributed; the Hall switches are respectively a first Hall switch, a second Hall switch and a third Hall switch, are uniformly distributed at an angle of 120 degrees, are fixed in the motor, are positioned between the magnetic pole of the motor rotor and the shell of the motor and are close to the magnetic pole of the motor rotor; the circle of the Hall switch and the circle of the magnetic pole of the motor rotor are concentrically arranged. The circuit of the motor rotation detection mechanism with the encoder function is further provided, the existing encoder is replaced through the cooperation of the magnetic pole of the motor rotor and the Hall switch, the circuit structure is simplified, and the failure rate is reduced.

Description

Motor rotation detection mechanism with encoder function and circuit thereof

Technical Field

The utility model relates to a motor detects technical field, in particular to motor rotation detection mechanism with encoder function and circuit thereof.

Background

At present, a servo barrier gate is becoming the mainstream of the market, and the barrier gate is also called a car stopper and is a channel entrance and exit management device specially used for limiting the driving of a motor vehicle on a road. The servo barrier gate has the core advantage that the servo barrier gate can rapidly and stably act so as to improve the vehicle passing efficiency. Thereby servo banister need have the encoder to detect motor turned angle and realize servo function, and servo banister uses solitary photoelectric encoder or magnetoelectric encoder mostly on the market, and the cost is higher, and components and parts have more the complicated fault rate of circuit also high moreover.

SUMMERY OF THE UTILITY MODEL

The utility model provides a motor rotation detection mechanism with encoder function and circuit thereof can effectively solve above-mentioned problem.

The utility model discloses a realize like this:

a motor rotation detecting mechanism having an encoder function, comprising:

a plurality of motor rotor magnetic poles which are uniformly distributed; the Hall switches are respectively a first Hall switch H1, a second Hall switch H2 and a third Hall switch H3, the Hall switches are uniformly distributed at an angle of 120 degrees, and are fixed in the motor, positioned between a magnetic pole of a motor rotor and a shell of the motor and close to the magnetic pole of the motor rotor; the circle of the Hall switch and the circle of the magnetic pole of the motor rotor are concentrically arranged.

As a further improvement, two adjacent motor rotor poles are uniformly distributed at an angle of 36 °.

As a further improvement, the hall switch model is SS 41F.

The utility model provides a motor rotates detection mechanism's circuit with encoder function, realizes above-mentioned arbitrary motor rotate detection mechanism with encoder function, includes hall switch and connector J1, first hall switch H1 second hall switch H2 a 1 st pin of third hall switch H3 is connected to the power VCC respectively, first hall switch H1 second hall switch H2 the 2 nd pin of third hall switch H3 ground connection respectively sets up, first hall switch H1 second hall switch H2 third hall switch H3's 3 rd pin is connected to connector J1's 4 th pin, 3 rd pin, 2 nd pin respectively, connector J1's 5 th pin is connected to the power VCC, connector J1's 1 st pin ground connection sets up.

The utility model has the advantages that: the utility model provides a motor rotation detection mechanism with encoder function and circuit thereof is through setting up 3 hall switches in electric motor rotor magnetic pole periphery to carry out the electricity with hall switch and the machine controller of motor itself and be connected, when through the circular telegram, the electric motor rotor magnetic pole passes through each in turn hall switch, thereby triggers each hall switch output digital signal, and the change of passing signal represents electric motor rotor pivoted angle and direction to calculate the rotational speed when changing long, realized the function of encoder, thereby substitute the encoder. The utility model discloses need not external solitary encoder both reduce cost, reduced the quantity of components and parts again, make the complete machine circuit simpler more stable, reduced the fault rate.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

Fig. 1 is a schematic structural diagram of a motor rotation detecting mechanism with an encoder function according to an embodiment of the present invention.

Fig. 2 is a schematic structural diagram of a motor rotation detecting mechanism with an encoder function according to an embodiment of the present invention, which has a top view with an angle mark.

Fig. 3 is a circuit diagram of a motor rotation detecting mechanism with an encoder function according to an embodiment of the present invention.

Detailed Description

To make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the drawings of the embodiments of the present invention are combined to clearly and completely describe the technical solutions of the embodiments of the present invention, and obviously, the described embodiments are some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention. Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.

Referring to fig. 1 to 2, a motor rotation detecting mechanism having an encoder function includes:

a plurality of motor rotor magnetic poles which are uniformly distributed; the Hall switch comprises 3 Hall switches, namely a first Hall switch H1, a second Hall switch H2 and a third Hall switch H3, wherein the Hall switches are uniformly distributed at an angle of 120 degrees, are fixed in a motor (not shown in the figure), are positioned between a magnetic pole of a motor rotor and a shell (not shown in the figure) of the motor and are close to the magnetic pole of the motor rotor; the circle of the Hall switch and the circle of the magnetic pole of the motor rotor are concentrically arranged. The motor rotor magnetic pole comprises an N pole magnetic pole 101 and an S pole magnetic pole 102.

Referring to fig. 3, a circuit of a motor rotation detection mechanism with an encoder function includes the above hall switch and a connector J1, where the 1 st pin of the first hall switch H1, the second hall switch H2, and the third hall switch H3 are respectively connected to a power VCC, the 2 nd pin of the first hall switch H1, the second hall switch H2, and the third hall switch H3 is respectively grounded, the 3 rd pin of the first hall switch H1, the second hall switch H2, and the third hall switch H3 is respectively connected to the 4 th pin, the 3 rd pin, and the 2 nd pin of the connector J1, the 5 th pin of the connector J1 is connected to the power VCC, and the 1 st pin of the connector J1 is grounded, so as to form a three-phase commutation hall circuit. The connector J1 is a 5-pin CON connector. The other end of the connector J1 is connected to a motor controller (not shown), which in this embodiment is a brushless motor, and the motor controller is used to provide a closed-loop commutation control signal for the three-phase brushless motor, and also to control the motor speed and provide the necessary protection for the motor by using the mode.

In the present embodiment, as shown in fig. 2, two adjacent motor rotor poles are uniformly distributed at an angle of 36 ° (angle α 1), so that there are 5 pairs of N-pole poles — S-pole poles. The 3 Hall switches are arranged in the motor and are uniformly distributed at an angle of 120 degrees (an angle alpha 2). The Hall switch model is SS 41F. SS41F series is a high-temperature bipolar Hall effect integrated sensor, which is a magnetic sensing circuit composed of an internal voltage stabilizing unit, a Hall voltage generator, a differential amplifier, a temperature compensation unit, a Schmitt trigger and a collector open-circuit output stage, the input of the magnetic sensing circuit is magnetic induction intensity, the output of the magnetic sensing circuit is a digital voltage signal (0 or 1), and the digital voltage signal can be directly interfaced with a logic circuit. The Hall switch is arranged on the periphery of a circle where the magnetic pole of the motor rotor is located and close to the magnetic pole of the motor rotor. When the motor is powered on, the motor rotor rotates, and due to the fact that magnetic poles (N poles and S poles) are arranged at intervals, the magnetic poles of the motor rotor alternately pass through each Hall switch, so that each Hall switch is triggered to alternately output digital signals 0 and 1. In the embodiment, when each Hall switch is in an N-pole magnetic field, a low level (0) is output, and a signal is latched; and turning off the low level until each Hall switch is in the S-pole magnetic field, and outputting a high level (1). The level signal of the alternating output of each hall switch is output to the motor controller through the connector J1, thereby controlling the stator of the motor to change the phase.

The level signal alternately output by each Hall switch can also be used for judging the rotation direction, the rotation angle and the rotation speed of the motor rotor, thereby realizing the function of an encoder. The specific realization principle is as follows:

when the motor is powered on, the motor rotor rotates, and the magnetic pole of the motor rotor alternately passes through each Hall switch, so that each Hall switch is triggered to alternately output a digital signal 0 and a digital signal 1; 3 Hall switches output 3-bit binary numbers according to the sequence of H2, H3 and H1, the binary numbers are converted into decimal numbers by the motor controller, and when the sequence of the decimal numbers corresponding to the output 3-bit binary numbers is 312546, the corresponding rotor rotates 1/5 circles clockwise; when the sequence of decimal numbers corresponding to the output 3-bit binary number is 645213, the corresponding rotor has rotated 1/5 turns counterclockwise; in this process, each change in the output represents a rotation of the rotor by 10 °, in other words, the precision of the rotation angle is 10 °. Therefore, the rotating angle and the rotating direction of the rotor are judged through the output of the 3 Hall switches, the rotating speed of the rotor can be calculated by utilizing the changed time difference, the function of the encoder is realized, and the encoder can be replaced.

The motor rotation detection mechanism with the encoder function and the circuit thereof utilize the built-in three-phase commutation Hall circuit of the brushless motor to realize the detection of the rotation angle of the motor, can replace the encoder, do not need an external independent encoder, reduce the cost, reduce the number of components and parts, make the circuit of the whole machine simpler and more stable, and reduce the failure rate. And because the device is applied to the servo barrier gate, the vehicle passing efficiency is also improved.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A motor rotation detecting mechanism with an encoder function, comprising:

a plurality of motor rotor magnetic poles which are uniformly distributed;

the Hall switches are respectively a first Hall switch H1, a second Hall switch H2 and a third Hall switch H3, the Hall switches are uniformly distributed at an angle of 120 degrees, and are fixed in the motor, positioned between a magnetic pole of a motor rotor and a shell of the motor and close to the magnetic pole of the motor rotor; the circle of the Hall switch and the circle of the magnetic pole of the motor rotor are concentrically arranged.

2. The motor rotation detecting mechanism with an encoder function as claimed in claim 1, wherein two adjacent motor rotor poles are uniformly distributed at an angle of 36 °.

3. The motor rotation detecting mechanism having an encoder function as claimed in claim 2, wherein the hall switch is of a type SS 41F.

4. A circuit of a motor rotation detecting mechanism with an encoder function, characterized by realizing a motor rotation detecting mechanism with an encoder function according to any one of claims 1 to 3, comprising a Hall switch and a connector J1, the 1 st pins of the first Hall switch H1, the second Hall switch H2 and the third Hall switch H3 are respectively connected to a power supply VCC, the 2 nd pins of the first Hall switch H1, the second Hall switch H2 and the third Hall switch H3 are respectively grounded, the 3 rd pins of the first, second and third Hall switches H1, H2 and H3 are connected to the 4 th, 3 rd and 2 nd pins of the connector J1 respectively, the 5 th pin of the connector J1 is connected to a power supply VCC, and the 1 st pin of the connector J1 is grounded.