CN220137163U - Rotating speed measuring instrument of totally-enclosed variable frequency motor - Google Patents
Rotating speed measuring instrument of totally-enclosed variable frequency motor Download PDFInfo
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- CN220137163U CN220137163U CN202321515984.8U CN202321515984U CN220137163U CN 220137163 U CN220137163 U CN 220137163U CN 202321515984 U CN202321515984 U CN 202321515984U CN 220137163 U CN220137163 U CN 220137163U
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Abstract
The utility model relates to a rotating speed measuring instrument of a totally-enclosed variable frequency motor, which comprises: the motor comprises a Hall sensor, a signal amplifying circuit, a key and display circuit, a signal processing circuit and a power supply, wherein the Hall sensor is arranged on a motor cable and used for collecting frequency signals of alternating voltage, the signal amplifying circuit is used for processing the frequency signals of the alternating voltage, and the signal processing circuit is used for supplying power to a rotating speed measuring instrument; the Hall sensor is connected with the signal amplifying circuit, and the signal amplifying circuit, the key and the display circuit are connected with the signal processing circuit. The device can be used for detecting the rotating speed of the totally-enclosed variable frequency motor and displaying the rotating speed in real time, and is suitable for all variable frequency motor models.
Description
Technical Field
The utility model belongs to the technical field of mechanical equipment state monitoring, and particularly relates to a rotating speed measuring instrument of a totally-enclosed variable frequency motor.
Background
The rotating speed of the variable frequency motor is controlled by a set frequency, the current general frequency converter is mostly in an open loop control mode, the actual rotating speed is not fed back, and because of the influence of control errors and load changes, sometimes, larger deviation occurs between the given rotating speed and the actual rotating speed, so that a user unit cannot completely master the actual state of the motor, and therefore, accurate measurement of the actual rotating speed is necessary. The existing rotation speed measuring method is generally to install a reflection sheet or a magnet on an exposed rotating component of a motor, and measure the rotation speed by utilizing the periodical change of photoelectric or magnetic signals. In some special occasions, due to the safety or dustproof requirements, a fully-closed device is required, so that the rotary part cannot be directly observed by the method.
Disclosure of Invention
The utility model aims to provide a rotating speed measuring instrument of a totally-enclosed variable frequency motor.
The technical scheme for solving the problems is as follows:
a rotational speed measuring instrument of a totally enclosed variable frequency motor, comprising: the motor comprises a Hall sensor, a signal amplifying circuit, a key and display circuit, a signal processing circuit and a power supply, wherein the Hall sensor is arranged on a motor cable and used for collecting frequency signals of alternating voltage, the signal amplifying circuit is used for processing the frequency signals of the alternating voltage, and the signal processing circuit is used for supplying power to a rotating speed measuring instrument;
the Hall sensor is connected with the signal amplifying circuit, and the signal amplifying circuit, the key and the display circuit are connected with the signal processing circuit.
According to the scheme, the Hall sensor collects the frequency signal of the alternating voltage on the motor cable in a non-contact mode.
According to the scheme, the key and display circuit comprises a key module and a display circuit, the key module comprises a key and a storage unit, the key and the storage unit are used for inputting the model of the variable frequency motor, and the display circuit adopts an SP410361N display chip.
According to the scheme, the signal processing circuit adopts the STM32F301 singlechip, the output of the signal amplifying circuit is connected with the pin 6 of the STM32F301 singlechip, the output of the key module is connected with the pins 18 to 22 of the STM32F301 singlechip, and the output of the display circuit is connected with the pins 8 to 15 of the STM32F301 singlechip.
According to the scheme, the signal processing circuit adopts the multiplication circuit, the division circuit and the STM32F301 singlechip which are sequentially connected, the output of the signal amplification circuit is connected with the pin 6 of the STM32F301 singlechip after passing through the multiplication circuit and the division circuit, 5 key outputs of the key module are respectively connected with the pins 18 to 22 of the STM32F301 singlechip, and the output of the display circuit is connected with the pins 8 to 15 of the STM32F301 singlechip.
The working principle of the device is as follows: the induction magnetic field signals of the current in the motor cable are collected through the Hall sensor, then the frequency conversion motor model is obtained according to the key module, and the induction magnetic field signals are converted into the rotating speed through the signal processing circuit by combining the frequency conversion motor model and are displayed on the screen.
The device has the beneficial effects that: the device can be used for detecting the rotating speed of the totally-enclosed variable frequency motor and displaying the rotating speed in real time, and is suitable for all variable frequency motor models.
Drawings
FIG. 1 is a schematic circuit diagram of an apparatus according to an embodiment of the present utility model;
fig. 2 is a schematic circuit diagram of a signal processing circuit according to an embodiment of the present utility model.
Detailed Description
The present utility model will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present utility model more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.
In an embodiment of the present utility model, as shown in fig. 1, a rotation speed measuring apparatus of a totally enclosed variable frequency motor includes: the motor comprises a Hall sensor, a signal amplifying circuit, a key and display circuit, a signal processing circuit and a power supply, wherein the Hall sensor is arranged on a motor cable and used for collecting frequency signals of alternating voltage, the signal amplifying circuit is used for processing the frequency signals of the alternating voltage, and the signal processing circuit is used for supplying power to a rotating speed measuring instrument;
the Hall sensor is connected with the signal amplifying circuit, and the signal amplifying circuit, the key and the display circuit are connected with the signal processing circuit.
The Hall sensor collects frequency signals of alternating voltage on a motor cable in a non-contact mode. The Hall sensor adopts an HX6659 chip.
The signal amplifying circuit comprises a frequency acquisition part which is connected in sequence. The signal amplifying circuit adopts an OPA237NA chip.
The key and display circuit comprises a key module and a display circuit, wherein the key module comprises a key and a storage unit, the key and the storage unit are used for inputting the model of the variable frequency motor, and the display circuit adopts an SP410361N display chip. According to the type of the variable frequency motor selected by the key, the pole pair number p of the motor and the motor slip ratio s can be correspondingly stored in the storage unit.
The signal processing circuit adopts an STM32F301 singlechip, the output of the signal amplification circuit is connected with the pin 6 of the STM32F301 singlechip, 5 key outputs of the key module are respectively connected with the pins 18 to 22 of the STM32F301 singlechip, and the output of the display circuit is connected with the pins 8 to 15 of the STM32F301 singlechip.
As shown in FIG. 2, the signal processing circuit can also adopt a gate circuit design, and comprises a multiplication circuit and a division circuit, and after receiving the frequency signal acquired by the Hall sensor, the signal processing circuit obtains the rotating speed measurement result of the variable frequency motor through an amplifying circuit and a gate circuit, and displays the rotating speed measurement result on a display screen through an STM32F301 singlechip.
The power supply of the device adopts 78L05S components and TPS54202 converters.
It will be understood that modifications and variations will be apparent to those skilled in the art from the foregoing description, and it is intended that all such modifications and variations be included within the scope of the following claims.
Claims (5)
1. A rotational speed measuring instrument of a totally enclosed variable frequency motor, comprising: the motor comprises a Hall sensor, a signal amplifying circuit, a key and display circuit, a signal processing circuit and a power supply, wherein the Hall sensor is arranged on a motor cable and used for collecting frequency signals of alternating voltage, the signal amplifying circuit is used for processing the frequency signals of the alternating voltage, and the signal processing circuit is used for supplying power to a rotating speed measuring instrument;
the Hall sensor is connected with the signal amplifying circuit, and the signal amplifying circuit, the key and the display circuit are connected with the signal processing circuit.
2. The rotating speed measuring instrument of the totally enclosed variable frequency motor according to claim 1, wherein the hall sensor is an HX6659 chip for collecting frequency signals of alternating voltage on a motor cable in a non-contact mode.
3. The totally enclosed inverter motor's rotational speed measuring instrument of claim 1, wherein the button and display circuit includes a button module and a display circuit, the button module includes a button and a memory list for inputting inverter motor model, the display circuit is a button and a display section.
4. The rotating speed measuring instrument of a totally-enclosed variable frequency motor according to claim 1, wherein the signal processing circuit adopts an STM32F301 singlechip, the output of the signal amplifying circuit is connected with a pin 6 of the STM32F301 singlechip, the output of the key module is connected with pins 18 to 22 of the STM32F301 singlechip, and the output of the display circuit is connected with pins 8 to 15 of the STM32F301 singlechip.
5. The rotating speed measuring instrument of a totally-enclosed variable frequency motor according to claim 1, wherein the signal processing circuit adopts a multiplication circuit, a division circuit and an STM32F301 singlechip which are sequentially connected, the output of the signal amplification circuit is connected with a pin 6 of the STM32F301 singlechip after passing through the multiplication circuit and the division circuit, 5 key outputs of the key module are respectively connected with pins 18 to 22 of the STM32F301 singlechip, and the output of the display circuit is connected with pins 8 to 15 of the STM32F301 singlechip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321515984.8U CN220137163U (en) | 2023-06-14 | 2023-06-14 | Rotating speed measuring instrument of totally-enclosed variable frequency motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321515984.8U CN220137163U (en) | 2023-06-14 | 2023-06-14 | Rotating speed measuring instrument of totally-enclosed variable frequency motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220137163U true CN220137163U (en) | 2023-12-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321515984.8U Active CN220137163U (en) | 2023-06-14 | 2023-06-14 | Rotating speed measuring instrument of totally-enclosed variable frequency motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220137163U (en) |
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2023
- 2023-06-14 CN CN202321515984.8U patent/CN220137163U/en active Active
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