CN117767803A - Motor rotating speed feedback circuit - Google Patents
Motor rotating speed feedback circuit Download PDFInfo
- Publication number
- CN117767803A CN117767803A CN202311106202.XA CN202311106202A CN117767803A CN 117767803 A CN117767803 A CN 117767803A CN 202311106202 A CN202311106202 A CN 202311106202A CN 117767803 A CN117767803 A CN 117767803A
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- resistor
- circuit
- irf830
- rotating speed
- motor
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- 238000007493 shaping process Methods 0.000 claims abstract description 27
- 239000003990 capacitor Substances 0.000 claims description 16
- 230000005669 field effect Effects 0.000 claims description 16
- 239000000203 mixture Substances 0.000 claims description 9
- 230000001788 irregular Effects 0.000 claims description 4
- 238000010586 diagram Methods 0.000 description 5
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
Abstract
The invention discloses a motor rotating speed feedback circuit which comprises a rotating speed acquisition module, a shaping circuit, a monostable circuit and a feedback output module which are sequentially connected; the motor speed feedback circuit is composed of a speed acquisition module, a shaping circuit, a monostable circuit and a feedback output module, is simple in structure, low in price and excellent in performance, and can replace the traditional motor speed feedback link.
Description
Technical Field
The invention relates to the field of motors, in particular to a motor rotating speed feedback circuit.
Background
In order to ensure the stability of the motor rotation speed, a closed-loop control system is generally adopted, a feedback link comprises motor rotation speed feedback, and a tachogenerator is generally adopted to change the rotation speed of the motor into a corresponding analog voltage signal.
Disclosure of Invention
The invention aims to provide a motor rotating speed feedback circuit which is composed of a rotating speed acquisition module, a shaping circuit, a monostable circuit and a feedback output module, has a simple structure, low price and excellent performance, and can replace the traditional motor rotating speed feedback link.
A motor rotation speed feedback circuit comprises a rotation speed acquisition module, a shaping circuit, a monostable circuit and a feedback output module which are sequentially connected;
the rotating speed acquisition module consists of a Hall sensor and a rotating disc connected to a motor, wherein a magnet is arranged on the rotating disc, the motor drives the rotating disc to rotate, a pulse signal proportional to the rotating speed is obtained through a Hall circuit, and the pulse signal is sent to the shaping circuit for processing;
the shaping circuit converts irregular pulse information transmitted by the rotating speed acquisition module into a rectangular wave pulse signal and transmits the rectangular wave pulse signal to the monostable circuit;
the monostable circuit converts the rectangular wave pulse signals with equal amplitude and unequal width transmitted by the shaping circuit into rectangular wave signals with equal amplitude and equal width and transmits the rectangular wave signals to the feedback output module;
the feedback output module is used for converting the digital signal into a direct-current voltage signal.
Preferably, the shaping circuit is formed by Q 2 IRF830 and R resistor 1、 Resistor R 2 The composition of the composite material comprises the components,
preferably, the monostable circuit is formed by a timer NE55D, a resistor R 3 Capacitance C 1 And C 2 Composition is prepared.
Preferably, the feedback output module is formed by Q 2 IRF830 and R resistor 4、 Resistor R 5、 Resistor R 6、 Resistor R 7 And capacitor C 3 Composition, wherein, resistance R 7 Is connected to the third leg of the timer NE55D, R 7 And the other end of (2) and the resistor R 4 Connected with Q at the same time 2 Grid G of field effect tube IRF830 is connected with resistor R 4 And a resistor R 7 Connected with Q at the same time 2 Grid G of field effect tube IRF830 is connected with resistor R 4 The other end of the resistor R is also connected with the positive electrode of the power supply 5 One end and resistor R 6 Connected with each other ， At the same time sum Q 2 The drain D of the field effect transistor IRF830 is connected with the capacitor C 3 Connected with capacitor C 3 The other end of the capacitor is also connected with the negative electrode of the power supply, Q 2 The source S of field effect transistor IRF830 is connected to the negative supply.
Preferably, the hall sensor in the acquisition module can be replaced by a photoelectric rotation speed sensor.
The invention has the advantages that: the motor speed feedback circuit is composed of a speed acquisition module, a shaping circuit, a monostable circuit and a feedback output module, is simple in structure, low in price and excellent in performance, and can replace the traditional motor speed feedback link.
Drawings
FIG. 1 is a schematic diagram of the present invention;
FIG. 2 is a schematic diagram of a motor speed feedback circuit according to the present invention;
FIG. 3 is a waveform diagram of a motor speed feedback circuit of the present invention;
FIG. 4 is a waveform diagram of a motor speed feedback circuit of the present invention;
the device comprises a rotating speed acquisition module, a rotating speed acquisition module and a control module, wherein 1; 2 shaping circuit; 3 monostable circuits; 4. and a feedback output module.
Detailed Description
The invention is further described in connection with the following detailed description, in order to make the technical means, the creation characteristics, the achievement of the purpose and the effect of the invention easy to understand.
As shown in fig. 1 to 4, the invention comprises a rotating speed acquisition module 1, a shaping circuit 2, a monostable circuit 3 and a feedback output module 4 which are connected in sequence;
the rotating speed acquisition module 1 consists of a Hall sensor and a rotating disc connected to a motor, wherein a magnet is arranged on the rotating disc, the motor drives the rotating disc to rotate, a pulse signal proportional to the rotating speed is obtained through a Hall circuit, and the pulse signal is sent to the shaping circuit 2 for processing;
the shaping circuit 2 converts irregular pulse information transmitted by the rotating speed acquisition module 1 into a rectangular wave pulse signal and transmits the rectangular wave pulse signal to the monostable circuit 3;
the monostable circuit 3 converts the rectangular wave pulse signals with equal amplitude and unequal width transmitted by the shaping circuit 2 into rectangular wave signals with equal amplitude and equal width and transmits the rectangular wave signals to the feedback output module 4;
the feedback output module 4 functions to convert the digital signal into a direct voltage signal.
The rotating speed acquisition module 1 is used for acquiring the rotating speed of the motor to obtain rotating speed pulse signals with different widths; the output of the rotating speed acquisition module 1 is sent to the shaping circuit 2, the shaping circuit 2 is used for preventing signal interference, and the output of the shaping circuit 2 is sent to the monostable circuit 3; the monostable circuit 3 is used for converting the received rotating speed pulse signals with different widths into rectangular wave signals with the same widths, and outputting the rectangular wave signals to the feedback output module 4; the feedback output module 4 converts the received rectangular wave signal with equal width into a direct current voltage signal. The whole work engineering finishes the accurate conversion from the motor rotating speed to the direct-current voltage signal, and sends the direct-current voltage signal to a given link of a control system, thereby finishing the whole feedback process.
Wherein the shaping circuit 2 is formed by Q 2 IRF830 and R resistor 1、 Resistor R 2 The monostable circuit 3 consists of a timer NE55D and a resistor R 3 Capacitance C 1 And C 2 Composition is prepared.
And the feedback output module 4 is formed by Q 2 IRF830 and R resistor 4、 Resistor R 5、 Resistor R 6、 Resistor R 7 And capacitor C 3 Composition, wherein, resistance R 7 Is connected to the third leg of the timer NE55D, R 7 And the other end of (2) and the resistor R 4 Connected with Q at the same time 2 Grid G of field effect tube IRF830 is connected with resistor R 4 And a resistor R 7 Connected with Q at the same time 2 Grid G of field effect tube IRF830 is connected with resistor R 4 The other end of the resistor R is also connected with the positive electrode of the power supply 5 One end and resistor R 6 Connected with each other ， At the same time sum Q 2 The drain D of the field effect transistor IRF830 is connected with the capacitor C 3 Connected with capacitor C 3 The other end of the capacitor is also connected with the negative electrode of the power supply, Q 2 The source S of field effect transistor IRF830 is connected to the negative supply.
In particular, the hall sensor in the acquisition module 1 can be replaced by a photoelectric speed sensor.
Specific embodiments and principles:
as shown in fig. 2, the rotation speed acquisition module 1 consists of a hall sensor and a turntable connected to a motor, wherein a magnet is arranged on the turntable, the motor drives the turntable to rotate, a pulse signal proportional to the rotation speed is obtained through a hall circuit, and the pulse signal is sent to the shaping circuit 2 for processing; the shaping circuit 2 is composed of Q 2 IRF830 and R resistor 1、 Resistor R 2 The irregular pulse information transmitted by the rotating speed acquisition module 1 is changed into a rectangular wave pulse signal; single sheetThe steady-state circuit 3 is composed of a timer NE55D and a resistor R 3 Capacitance C 1 And C 2 The rectangular wave pulse signal with equal amplitude and unequal width transmitted by the shaping circuit 2 is converted into rectangular wave signal with equal amplitude and equal width by a monostable circuit, so that the average value of the output direct current voltage of the pulse in each unit time corresponds to the number of the pulse in the unit time precisely, namely the motor rotating speed precisely, and the waveform diagram is shown in figure 3.
The feedback output module 4 is composed of Q 2 IRF830 and R resistor 4、 Resistor R 5、 Resistor R 6、 Resistor R 7 And capacitor C 3 Composition, wherein, resistance R 7 Is connected to the third leg of the timer NE55D, R 7 And the other end of (2) and the resistor R 4 Connected with Q at the same time 2 The grid G of the field effect transistor IRF830 is connected; resistor R 4 And a resistor R 7 Connected with Q at the same time 2 Grid G of field effect tube IRF830 is connected with resistor R 4 The other end of the power supply is also connected with the positive electrode of the power supply; resistor R 5 One end and resistor R 6 Connected with Q at the same time 2 The drain D of the field effect transistor IRF830 is connected with the capacitor C 3 Connected with capacitor C 3 The other end of the capacitor is also connected with the negative electrode of the power supply, Q 2 The source S of the field effect transistor IRF830 is connected with the negative electrode of the power supply, and the feedback output module 4 is used for converting the digital signal into a direct-current voltage signal, wherein the input signal waveform u of the monostable circuit 3 02 Output signal waveform u 02 And feedback output module 4 outputs signal waveform u 03 The waveforms of which are shown in fig. 3 and 4, the circuit ultimately obtains an accurate dc feedback voltage corresponding to the motor speed.
Based on the above, the motor speed feedback circuit is composed of the speed acquisition module, the shaping circuit, the monostable circuit and the feedback output module, has simple structure, low price and excellent performance, and can replace the traditional motor speed feedback link.
It will be appreciated by those skilled in the art that the present invention can be carried out in other embodiments without departing from the spirit or essential characteristics thereof. Accordingly, the above disclosed embodiments are illustrative in all respects, and not exclusive. All changes that come within the scope of the invention or equivalents thereto are intended to be embraced therein.
Claims (5)
1. The motor rotating speed feedback circuit is characterized by comprising a rotating speed acquisition module (1), a shaping circuit (2), a monostable circuit (3) and a feedback output module (4) which are connected in sequence;
the rotating speed acquisition module (1) consists of a Hall sensor and a rotating disc connected to a motor, wherein a magnet is arranged on the rotating disc, the motor drives the rotating disc to rotate, a pulse signal proportional to the rotating speed is obtained through a Hall circuit, and the pulse signal is sent to the shaping circuit (2) for processing;
the shaping circuit (2) converts irregular pulse information transmitted by the rotating speed acquisition module (1) into a rectangular wave pulse signal and transmits the rectangular wave pulse signal to the monostable circuit (3);
the monostable circuit (3) converts rectangular wave pulse signals with equal amplitude and unequal width transmitted by the shaping circuit (2) into rectangular wave signals with equal amplitude and equal width and transmits the rectangular wave signals to the feedback output module (4);
the feedback output module (4) is used for converting the digital signal into a direct-current voltage signal.
2. A motor speed feedback circuit as claimed in claim 1, wherein: the shaping circuit 2 is formed by Q 2 IRF830 and R resistor 1、 Resistor R 2 Composition is prepared.
3. A motor speed feedback circuit as claimed in claim 1, wherein: the monostable circuit (3) consists of a timer NE55D and a resistor R 3 Capacitance C 1 And C 2 Composition is prepared.
4. A motor speed feedback circuit as claimed in claim 1, wherein: the feedback output module (4) is formed by Q 2 IRF830 and R resistor 4、 ResistorR 5、 Resistor R 6、 Resistor R 7 And capacitor C 3 Composition, wherein, resistance R 7 Is connected to the third leg of the timer NE55D, R 7 And the other end of (2) and the resistor R 4 Connected with Q at the same time 2 Grid G of field effect tube IRF830 is connected with resistor R 4 And a resistor R 7 Connected with Q at the same time 2 Grid G of field effect tube IRF830 is connected with resistor R 4 The other end of the resistor R is also connected with the positive electrode of the power supply 5 One end and resistor R 6 Connected with each other ， At the same time sum Q 2 The drain D of the field effect transistor IRF830 is connected with the capacitor C 3 Connected with capacitor C 3 The other end of the capacitor is also connected with the negative electrode of the power supply, Q 2 The source S of field effect transistor IRF830 is connected to the negative supply.
5. A motor speed feedback circuit as claimed in claim 1, wherein: the hall sensor in the acquisition module (1) can be replaced by a photoelectric rotation speed sensor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311106202.XA CN117767803A (en) | 2023-08-30 | 2023-08-30 | Motor rotating speed feedback circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311106202.XA CN117767803A (en) | 2023-08-30 | 2023-08-30 | Motor rotating speed feedback circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117767803A true CN117767803A (en) | 2024-03-26 |
Family
ID=90322626
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311106202.XA Pending CN117767803A (en) | 2023-08-30 | 2023-08-30 | Motor rotating speed feedback circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117767803A (en) |
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2023
- 2023-08-30 CN CN202311106202.XA patent/CN117767803A/en active Pending
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