CN210781423U - Electromagnetic heating drive circuit based on single chip microcomputer control - Google Patents
Electromagnetic heating drive circuit based on single chip microcomputer control Download PDFInfo
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- CN210781423U CN210781423U CN201921674834.5U CN201921674834U CN210781423U CN 210781423 U CN210781423 U CN 210781423U CN 201921674834 U CN201921674834 U CN 201921674834U CN 210781423 U CN210781423 U CN 210781423U
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Abstract
The utility model discloses an electromagnetic heating drive circuit based on single chip microcomputer control, which comprises a single chip microcomputer, a voltage division circuit, a drive output soft start circuit, an isolation circuit, a heat dissipation control circuit and a heating control circuit, wherein the voltage division circuit, the drive output soft start circuit, the isolation circuit, the heat dissipation control circuit and the heating control circuit are respectively connected with the single chip microcomputer; the input end of the driving output soft start circuit is simultaneously connected with the first input end and the second input end of the singlechip; the input end of the isolation circuit is connected with the output end of the driven device; the first output end of the isolation circuit is connected with the second output end of the singlechip, and the first output end of the isolation circuit is simultaneously connected with a power supply VCC through a resistor R3; the input end of the heat dissipation control circuit is connected with the power supply input end of the single chip microcomputer; the power input end of the singlechip is simultaneously connected with a power VCC; the fourth output of singlechip is connected to heating control circuit's input, the utility model discloses can realize the real time monitoring to receiving drive arrangement running state.
Description
Technical Field
The utility model relates to an electromagnetic heating drive circuit especially relates to an electromagnetic heating drive circuit based on single chip microcomputer control.
Background
During the operation of the electromagnetic heating device, various faults are easy to occur, such as overcurrent faults or heat dissipation faults and the like. In order to facilitate real-time monitoring of the operation state of the electromagnetic heating device, an additional dedicated monitoring device is generally configured for the electromagnetic heating device. Although the special monitoring equipment can play a role in monitoring the electromagnetic heating equipment in real time, the special monitoring equipment is usually complex in internal design and high in purchase cost, and brings unnecessary use cost to users. Moreover, in order to facilitate on-off control of the electromagnetic heating device, in practical applications, it is necessary to implement soft-start control of the electromagnetic heating device, but the configured dedicated monitoring device usually does not have the function of controlling the electromagnetic heating device by soft-start, and at this time, an additional soft-start control device needs to be configured to control on and off of the electromagnetic heating device, which undoubtedly brings trouble to users in use and increases use cost.
SUMMERY OF THE UTILITY MODEL
In view of the above technical problem, an object of the present invention is to provide an electromagnetic heating driving circuit based on single chip microcomputer control, so as to solve the above technical problem.
The technical proposal adopted by the utility model for solving the technical problems is to provide an electromagnetic heating driving circuit based on the control of a single chip microcomputer, which comprises the single chip microcomputer, and a voltage division circuit, a driving output soft start circuit, an isolation circuit, a heat dissipation control circuit, a heating control circuit, a driving indication circuit and an over-current indication circuit which are respectively connected with the single chip microcomputer,
the input end of the voltage division circuit is connected with a power supply VCC, and the first output end of the voltage division circuit is connected with the first input end of the singlechip; the second output end of the voltage division circuit is grounded;
the input end of the driving output soft start circuit is simultaneously connected with the first input end and the second input end of the singlechip; the output end of the driving output soft start circuit is grounded;
the input end of the isolation circuit is connected with the output end of the driven device; the first output end of the isolation circuit is connected with the second output end of the single chip microcomputer, and the first output end of the isolation circuit is simultaneously connected with the power supply VCC through a resistor R3; the second output end of the isolation circuit is grounded;
the output end of the heat dissipation control circuit is grounded, and the input end of the heat dissipation control circuit is connected with the power supply input end of the single chip microcomputer; the power supply input end of the single chip microcomputer is simultaneously connected with the power supply VCC;
the output end of the heating control circuit is grounded; the input end of the heating control circuit is connected with the fourth output end of the single chip microcomputer;
the output end of the driving indication circuit is grounded; the input end of the driving indication circuit is connected with the third output end of the single chip microcomputer;
the output end of the over-current indicating circuit is grounded; the input end of the over-current indicating circuit is connected with the first output end of the singlechip.
As an optimized proposal of the utility model, the specific model of the single chip microcomputer is ATtiny 26.
As an optimized scheme of the utility model, including a potentiometre in the bleeder circuit, the input of potentiometre is connected the power VCC, the output ground connection of potentiometre, the middle-end connection of potentiometre the seventh pin of singlechip.
As a preferred scheme of the present invention, the driving output soft start circuit is a capacitor C1, and one end of the capacitor C1 is connected to the seventh pin and the ninth pin of the single chip microcomputer; the other end of the capacitor C1 is grounded.
As a preferable scheme of the present invention, the isolation circuit is a photoelectric coupler U2, and an input end of the photoelectric coupler U2 is connected to an output end of the driven device; a first output end of the photoelectric coupler is connected with a fourteenth pin of the single chip microcomputer, and the first output end of the photoelectric coupler is simultaneously connected with the power supply VCC through a third resistor R3; and the second output end of the photoelectric coupler is grounded.
As a preferred scheme of the utility model, the concrete model of optoelectronic coupler is PC 817.
As a preferred scheme of the present invention, the heat dissipation control circuit is a switch S2, and one end of the switch S2 is connected to the fifth pin and the fifteenth pin of the single chip microcomputer; the other end of the switch S2 is grounded;
and a fifth pin and a fifteenth pin of the single chip microcomputer are connected with a power supply VCC after being in short circuit.
As a preferable scheme of the present invention, the heating control circuit is a switch S1, and one end of the switch S1 is connected to a twelfth pin of the single chip; the other end of the switch S1 is grounded.
As an optimized scheme of the present invention, the driving indication circuit includes a fifth resistor R5 and a second light emitting diode D2, one end of the fifth resistor R5 is connected to the thirteenth pin of the single chip, the other end of the fifth resistor R5 is connected to the anode of the second light emitting diode D2, and the cathode of the second light emitting diode D2 is grounded.
As a preferable embodiment of the present invention, the overcurrent indication circuit includes a sixth resistor R6 and a third light emitting diode D3, one end of the sixth resistor R6 is connected to the seventeenth pin of the single chip, the other end of the sixth resistor R6 is connected to the anode of the third light emitting diode D2, and the cathode of the third light emitting diode D3 is grounded.
The utility model has the advantages that:
the utility model discloses singlechip based on conventional can realize the real-time supervision to electromagnetic heating equipment running state to according to the analysis program of predetermineeing in the singlechip, the fault signal based on electromagnetic heating equipment feedback simultaneously can separate out electromagnetic heating equipment's fault type, with the suggestion user intervene the processing as early as possible. And, the utility model discloses can realize the soft start to electromagnetic heating equipment, make things convenient for the user to electromagnetic heating equipment's start/close control.
Drawings
Fig. 1 is a circuit diagram of an electromagnetic heating driving circuit based on single chip microcomputer control according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a single chip microcomputer adopted in the electromagnetic heating driving circuit provided by the embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.
It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict.
The present invention will be further described with reference to the accompanying drawings and specific embodiments, but the present invention is not limited thereto.
The embodiment of the present invention provides an electromagnetic heating driving circuit based on single chip microcomputer control, please refer to fig. 1 and fig. 2, which includes a single chip microcomputer, and a voltage dividing circuit, a driving output soft start circuit, an isolation circuit, a heat dissipation control circuit, a heating control circuit, a driving indication circuit and an over-current indication circuit respectively connected to the single chip microcomputer,
the input end of the voltage division circuit is connected with a power supply VCC, and the first output end of the voltage division circuit is connected with the first input end of the singlechip; the second output end of the voltage division circuit is grounded;
the input end of the driving output soft start circuit is simultaneously connected with the first input end and the second input end of the singlechip; the output end of the driving output soft start circuit is grounded;
the input end of the isolation circuit is connected with the output end of the driven device; the first output end of the isolation circuit is connected with the second output end of the singlechip, and the first output end of the isolation circuit is simultaneously connected with a power supply VCC through a resistor R3; the second output end of the isolation circuit is grounded;
the output end of the heat dissipation control circuit is grounded, and the input end of the heat dissipation control circuit is connected with the power supply input end of the single chip microcomputer; the power input end of the singlechip is simultaneously connected with a power VCC;
the output end of the heating control circuit is grounded; the input end of the heating control circuit is connected with the fourth output end of the singlechip;
the output end of the driving indication circuit is grounded; the input end of the driving indicating circuit is connected with the third output end of the single chip microcomputer;
the output end of the overcurrent indicating circuit is grounded; the input end of the overcurrent indicating circuit is connected with the first output end of the singlechip.
In the above technical solution, the single chip microcomputer may be an AVR-series single chip microcomputer existing in the prior art, or a PIC-series single chip microcomputer, an STM 8-series single chip microcomputer, a 51-series single chip microcomputer or other derivative series single chip microcomputers, and in this embodiment, the single chip microcomputer is preferably an AVR-series single chip microcomputer of which the model is attiy 26.
Specifically, referring to fig. 1, the voltage divider circuit includes a potentiometer 100, an input terminal 101 of the potentiometer 100 is connected to a power VCC, an output terminal 102 of the potentiometer 100 is grounded, and an intermediate terminal 103 of the potentiometer 100 is connected to a seventh pin U17 of the ATtiny26 single chip microcomputer U1.
In this embodiment, the input end 101 of the potentiometer 100 is the input end of the voltage dividing circuit, the output end 102 of the potentiometer 100 is the second output end of the voltage dividing circuit, and the middle end 103 of the potentiometer 100 is the first output end of the voltage dividing circuit; the first input end of the singlechip is the seventh pin U17 of the ATtiny26 singlechip U1.
The driving output soft start circuit is a capacitor C1, one end of the capacitor C1 is simultaneously connected with a seventh pin U17 and a ninth pin U19 of the ATtiny26 singlechip; the other terminal of the capacitor C1 is connected to ground.
It should be noted that, in this embodiment, the second input end of the single chip microcomputer is the ninth pin U19 of the ATtiny26 single chip microcomputer U1; the input end of the driving output soft start circuit is one end of a seventh pin U17 and a ninth pin U19, wherein the capacitor C1 is connected with the ATtiny26 singlechip U1; the output end of the driving output soft start circuit is the end of the capacitor C1 grounded.
The isolation circuit is a photoelectric coupler U2, and the input end U21 of the photoelectric coupler U2 is connected with the output end of the driven device; a first output end U22 of the photoelectric coupler U2 is connected with a fourteenth pin U114 of the ATtiny26 singlechip U1, and a first output end U22 of the photoelectric coupler U2 is connected with a power supply VCC through a third resistor R3; the second output terminal U23 of the optocoupler U2 is connected to ground.
Preferably, the photocoupler U2 is a photocoupler with the type PC817 in the prior art.
It should be noted that, in this embodiment, the input end of the isolation circuit is the input end U21 of the photocoupler U2; the first output end of the isolation circuit is the first output end U22 of the photoelectric coupler U2; the second output terminal of the isolation circuit is the second output terminal U23 of the photocoupler U2.
The heat dissipation control circuit is a switch S2, one end of the switch S2 is simultaneously connected with a fifth pin U15 and a fifteenth pin U115 of an ATtiny26 singlechip U1; the other end of the switch S2 is grounded;
and a fifth pin U15 and a fifteenth pin U115 of the singlechip U1 are connected with a power supply VCC after being short-circuited.
It should be noted that, in this embodiment, the output terminal of the heat dissipation control circuit is the ground terminal of the switch S2; the input end of the heat dissipation control circuit is one end of a fifth pin U15 and a fifteenth pin U115 of the switch S2 connected with the ATtiny26 singlechip U1.
The heating control circuit is a switch S1, one end of the switch S1 is connected with a twelfth pin U112 of the ATtiny26 singlechip U1; the other end of the switch S1 is connected to ground.
Here, in the present embodiment, the output terminal of the heating control circuit is the ground terminal of the switch S1; the fourth output end of the singlechip is the twelfth pin U112 of the ATtiny26 singlechip U1.
The driving indication circuit comprises a fifth resistor R5 and a second light emitting diode D2, one end of the fifth resistor R5 is connected with a thirteenth pin U113 of the ATtiny26 singlechip U1, the other end of the fifth resistor R5 is connected with the anode of the second light emitting diode D2, and the cathode of the second light emitting diode D2 is grounded.
It should be noted that, in this embodiment, the output end of the driving indication circuit is the ground end of the second light emitting diode D2; the third output end of the singlechip is the thirteenth pin U113 of the ATtiny26 singlechip U1.
The overcurrent indicating circuit comprises a sixth resistor R6 and a third light-emitting diode D3, one end of the sixth resistor R6 is connected with a seventeenth pin U117 of the ATtiny26 singlechip U1, the other end of the sixth resistor R6 is connected with the anode of the third light-emitting diode D3, and the cathode of the third light-emitting diode D3 is grounded.
Here, in the present embodiment, the output terminal of the over-current indication circuit is the ground terminal of the third light emitting diode D3; the first output end of the singlechip is the seventeenth pin U117 of the ATtiny26 singlechip U1.
The utility model discloses the realization is to receiving drive arrangement's drive control's process brief as follows:
the I/O port of the monolithic computer U1 of the ATtiny26 outputs a stable driving signal (for example, a driving signal can be output through the nineteenth pin or the twentieth pin of the monolithic computer of ATtiny 26), and signals fed back through the I/O ports of the monolithic computer are detected in each driving cycle, so as to determine the operating condition of the driven device and the fault types corresponding to various faults when the fault occurs.
For example, in this embodiment, the fourteenth pin U114 of the monolithic computer U1 of the ATtiny26 may be connected to a driven device to perform overcurrent detection on the driven device; the twelfth pin U112 of the ATtiny26 singlechip U1 is connected with driven equipment to heat and control the driven equipment; the eleventh pin U111 of the ATtiny26 singlechip U1 can be connected with driven equipment to carry out heat dissipation and overtemperature detection on the driven equipment; the seventeenth pin U117 of the singlechip U1 can be connected with a driving indicating circuit through the ATtiny26, and the driving indicating circuit is used for indicating the electromagnetic heating driving condition of the driven equipment; an overcurrent indicating circuit can be connected with a thirteenth pin U113 of the singlechip U1 through the ATtiny26 to indicate overcurrent faults when overcurrent faults occur in the driven equipment.
In each driving period, the single chip microcomputer can read data of the I/O port or internal AD conversion register data to serve as timing register data, and the I/O port can be controlled to output driving signals with different frequencies by changing the timing register data.
Specifically, referring to fig. 1, the switch S1 is a start/stop switch, the switch S2 is a heat dissipation control switch, the second diode D2 is used for indicating an overcurrent fault of the driven device, and the third diode D3 is used for indicating an operating state of the electromagnetic heating driving circuit. The nineteenth pin U119 and the twentieth pin U120 of the ATtiny26 singlechip U1 are used for outputting driving signals for controlling the operation of the driven equipment. An overcurrent fault signal generated when overcurrent fault occurs in the driven equipment is transmitted to a fourteenth pin U114 of the ATtiny26 singlechip U1 through a photoelectric coupler U2. The potentiometer 100 divides the voltage of the power source VCC and applies the divided voltage to the seventh pin U17 of the ATtiny26 singlechip U1.
Before the singlechip outputs the driving signal, the electricity on the capacitor C1 is discharged through the ninth pin U19, so that the driving signal output has a soft start process with the frequency from high to low.
Adjusting the resistance of resistor R2 in potentiometer 199 can change the driving output frequency of the single chip. When the singlechip detects that an overcurrent signal is input into the fourteenth pin U114, the singlechip controls to close the driving output of the singlechip according to a preset control program, and then the driving output is restarted after a preset time is delayed. If the singlechip detects that the fourteenth pin U114 has an overcurrent signal input after the driving output is restarted for three times, the singlechip controls to close the driving output of the singlechip and lock the driving output until the singlechip is electrified again.
To sum up, the utility model discloses singlechip based on conventional can realize the real-time supervision to electromagnetic heating equipment running state to according to the analysis program of predetermineeing in the singlechip, the fault signal based on electromagnetic heating equipment feedback simultaneously can separate out electromagnetic heating equipment's fault type, with the suggestion user intervention processing as early as possible. And, the utility model discloses can realize the soft start to electromagnetic heating equipment, make things convenient for the user to electromagnetic heating equipment's start/close control.
The above description is only an example of the preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and those skilled in the art should be able to realize the equivalent alternatives and obvious variations of the present invention.
Claims (10)
1. An electromagnetic heating drive circuit based on single chip microcomputer control is characterized by comprising a single chip microcomputer, and a voltage division circuit, a drive output soft start circuit, an isolation circuit, a heat dissipation control circuit, a heating control circuit, a drive indication circuit and an overcurrent indication circuit which are respectively connected with the single chip microcomputer,
the input end of the voltage division circuit is connected with a power supply VCC, and the first output end of the voltage division circuit is connected with the first input end of the singlechip; the second output end of the voltage division circuit is grounded;
the input end of the driving output soft start circuit is simultaneously connected with the first input end and the second input end of the singlechip; the output end of the driving output soft start circuit is grounded;
the input end of the isolation circuit is connected with the output end of the driven device; the first output end of the isolation circuit is connected with the second output end of the single chip microcomputer, and the first output end of the isolation circuit is simultaneously connected with the power supply VCC through a resistor R3; the second output end of the isolation circuit is grounded;
the output end of the heat dissipation control circuit is grounded, and the input end of the heat dissipation control circuit is connected with the power supply input end of the single chip microcomputer; the power supply input end of the single chip microcomputer is simultaneously connected with the power supply VCC; the output end of the heating control circuit is grounded;
the input end of the heating control circuit is connected with the fourth output end of the single chip microcomputer; the output end of the driving indication circuit is grounded;
the input end of the driving indication circuit is connected with the third output end of the single chip microcomputer; the output end of the over-current indicating circuit is grounded; the input end of the over-current indicating circuit is connected with the first output end of the singlechip.
2. The electromagnetic heating driving circuit according to claim 1, wherein the specific type of the single chip microcomputer is ATtiny 26.
3. The electromagnetic heating driving circuit according to claim 2, wherein the voltage dividing circuit comprises a potentiometer, an input terminal of the potentiometer is connected to the power source VCC, an output terminal of the potentiometer is grounded, and an intermediate terminal of the potentiometer is connected to a seventh pin of the single chip microcomputer.
4. The electromagnetic heating driving circuit according to claim 2, wherein the driving output soft start circuit is a capacitor C1, and one end of the capacitor C1 is connected to the seventh pin and the ninth pin of the single chip microcomputer; the other end of the capacitor C1 is grounded.
5. The electromagnetic heating driving circuit according to claim 2, wherein the isolation circuit is an opto-coupler U2, an input terminal of the opto-coupler U2 is connected to an output terminal of the driven device; a first output end of the photoelectric coupler is connected with a fourteenth pin of the single chip microcomputer, and the first output end of the photoelectric coupler is simultaneously connected with the power supply VCC through a third resistor R3; and the second output end of the photoelectric coupler is grounded.
6. The electromagnetic heating driving circuit according to claim 5, wherein the specific type of the photocoupler is PC 817.
7. The electromagnetic heating driving circuit according to claim 2, wherein the heat dissipation control circuit is a switch S2, and one end of the switch S2 is connected to the fifth pin and the fifteenth pin of the single chip microcomputer; the other end of the switch S2 is grounded; and the fifth pin and the fifteenth pin of the single chip microcomputer are connected with the power supply VCC after being in short circuit.
8. The electromagnetic heating driving circuit according to claim 2, wherein the heating control circuit is a switch S1, and one end of the switch S1 is connected to a twelfth pin of the single chip; the other end of the switch S1 is grounded.
9. The electromagnetic heating driving circuit as claimed in claim 2, wherein the driving indication circuit includes a fifth resistor R5 and a second light emitting diode D2, one end of the fifth resistor R5 is connected to the thirteenth pin of the single chip, the other end of the fifth resistor R5 is connected to the anode of the second light emitting diode D2, and the cathode of the second light emitting diode D2 is grounded.
10. The electromagnetic heating driving circuit according to claim 2, wherein the over-current indication circuit includes a sixth resistor R6 and a third led D3, one end of the sixth resistor R6 is connected to a seventeenth pin of the single chip, the other end of the sixth resistor R6 is connected to an anode of the third led D2, and a cathode of the third led D3 is grounded.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921674834.5U CN210781423U (en) | 2019-10-09 | 2019-10-09 | Electromagnetic heating drive circuit based on single chip microcomputer control |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921674834.5U CN210781423U (en) | 2019-10-09 | 2019-10-09 | Electromagnetic heating drive circuit based on single chip microcomputer control |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210781423U true CN210781423U (en) | 2020-06-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921674834.5U Active CN210781423U (en) | 2019-10-09 | 2019-10-09 | Electromagnetic heating drive circuit based on single chip microcomputer control |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210781423U (en) |
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2019
- 2019-10-09 CN CN201921674834.5U patent/CN210781423U/en active Active
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