CN217096053U - Drive control circuit of heating equipment and brazing furnace - Google Patents
Drive control circuit of heating equipment and brazing furnace Download PDFInfo
- Publication number
- CN217096053U CN217096053U CN202220862169.8U CN202220862169U CN217096053U CN 217096053 U CN217096053 U CN 217096053U CN 202220862169 U CN202220862169 U CN 202220862169U CN 217096053 U CN217096053 U CN 217096053U
- Authority
- CN
- China
- Prior art keywords
- circuit
- controller
- drive control
- signal
- temperature
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Abstract
The application relates to a drive control circuit of heating equipment and a brazing furnace. The driving control circuit of the heating equipment comprises a controller, a switch circuit, a current sampling circuit and a temperature sampling circuit; the control end of the switching circuit is connected with the controller, the first end of the switching circuit is used for being connected with a power supply, and the second end of the switching circuit is used for being connected with the heating coil; the current sampling circuit is used for collecting a working current signal of the heating coil and transmitting the working current signal to the controller; and the temperature sampling circuit is used for acquiring a temperature signal of the workpiece to be heated and transmitting the temperature signal to the controller. The drive control circuit of the heating device can acquire more working condition information through the temperature signal acquired by the temperature sampling circuit and the working current signal acquired by the current sampling circuit so that the controller can further control the switch circuit, thereby adjusting the frequency of the alternating current and the amplitude of the output voltage and further providing hardware support for accurate temperature control of the drive control circuit.
Description
Technical Field
The application relates to the technical field of induction heating, in particular to a drive control circuit of heating equipment and a brazing furnace.
Background
The vacuum brazing furnace is a device for heating workpieces in vacuum or special protective gas, and is mainly used for welding high-quality and easily-oxidized materials. The large-current electrode is generally used for electric automobiles, large-capacity electrical equipment and the like, and electrode welding spots are required to have no internal defects, high strength and good consistency and are generally processed by adopting a vacuum brazing furnace.
In the implementation process, the inventor finds that at least the following problems exist in the conventional technology: the traditional heating equipment has the problems of poor control precision, poor functionality and the like.
SUMMERY OF THE UTILITY MODEL
In view of the above, it is necessary to provide a drive control circuit of a heating apparatus and a brazing furnace capable of improving control accuracy and functionality.
In order to achieve the above object, in one aspect, an embodiment of the present invention provides a driving control circuit of a heating apparatus, including:
a controller;
a switching circuit; the control end of the switching circuit is connected with the controller, the first end of the switching circuit is used for being connected with a power supply, and the second end of the switching circuit is used for being connected with the heating coil;
the current sampling circuit is used for collecting a working current signal of the heating coil and transmitting the working current signal to the controller;
and the temperature sampling circuit is used for acquiring a temperature signal of the workpiece to be heated and transmitting the temperature signal to the controller.
In one embodiment, the device further comprises a switching value interface circuit;
one end of the switching value interface circuit is connected with the controller, and the other end of the switching value interface circuit is used for connecting auxiliary equipment; the auxiliary equipment comprises any one or more of the following equipment: cabin door on-off mechanism, start and stop vacuum pump, protection air valve, admission valve, discharge valve and fan.
In one embodiment, the switching circuit comprises a driving circuit and an IGBT module;
one end of the driving circuit is connected with the controller, and the other end of the driving circuit is connected with the first end of the IGBT module; the second end of the IGBT module is used for being connected with the heating coil, and the third end of the IGBT module is used for being connected with a power supply.
In one embodiment, the monitoring and alarming device further comprises a monitoring and alarming circuit;
the first end of the monitoring alarm circuit is connected with the controller, the second end of the monitoring alarm circuit is connected with the switch circuit, and the third end of the monitoring alarm circuit is connected with the current sampling circuit.
In one embodiment, the monitoring alarm circuit comprises a processor and a comparator;
the first input end of the comparator is connected with the current sampling circuit, the second input end of the comparator is grounded, and the output end of the comparator is connected with the processor; the processor is respectively connected with the switch circuit and the controller.
In one embodiment, the current sampling circuit comprises a current transformer and a signal conditioning circuit;
the signal conditioning circuit is respectively connected with the current transformer and the controller; the current transformer is used for collecting working current signals.
In one embodiment, the temperature sampling circuit comprises a temperature sensor and a signal amplifying circuit;
the signal amplifying circuit is respectively connected with the temperature sensor and the controller; the temperature sensor is used for acquiring temperature signals.
In one embodiment, the system further comprises a digital quantity interface circuit;
one end of the digital quantity interface circuit is used for connecting the PLC control equipment, and the other end of the digital quantity interface circuit is connected with the controller.
In one embodiment, the device further comprises a communication interface circuit;
one end of the communication interface circuit is used for connecting an upper computer, and the other end of the communication interface circuit is connected with a controller.
On the other hand, the embodiment of the utility model provides a brazing furnace still provides, include the drive control circuit of firing equipment as above-mentioned any one.
One of the above technical solutions has the following advantages and beneficial effects:
the drive control circuit of the heating device can acquire more working condition information through the temperature signal acquired by the temperature sampling circuit and the working current signal acquired by the current sampling circuit so that the controller can further control the switch circuit, thereby adjusting the frequency of the alternating current and the amplitude of the output voltage and further providing hardware support for accurate temperature control of the drive control circuit.
Drawings
The foregoing and other objects, features and advantages of the application will be apparent from the following more particular description of preferred embodiments of the application, as illustrated in the accompanying drawings. Like reference numerals refer to like parts throughout the drawings, and the drawings are not intended to be drawn to scale in actual size, with emphasis instead being placed upon illustrating the subject matter of the present application.
FIG. 1 is a schematic block diagram of a drive control circuit of a heating apparatus in one embodiment;
FIG. 2 is a block diagram showing two schematic configurations of a drive control circuit of the heating apparatus in one embodiment;
FIG. 3 is a block diagram showing three schematic configurations of a drive control circuit of the heating apparatus in one embodiment;
FIG. 4 is a block diagram showing a fourth schematic configuration of a drive control circuit of the heating apparatus in one embodiment;
fig. 5 is a block diagram showing five schematic configurations of a drive control circuit of the heating apparatus in one embodiment.
Detailed Description
To facilitate an understanding of the present application, the present application will now be described more fully with reference to the accompanying drawings. Preferred embodiments of the present application are shown in the drawings. This application may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
It will be understood that when an element is referred to as being "connected" to another element, it can be directly connected to the other element and be integral therewith, or intervening elements may also be present. The terms "mounted," "one end," "the other end," and the like are used herein for illustrative purposes only.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
In one embodiment, as shown in fig. 1, there is provided a driving control circuit of a heating apparatus, including:
a controller;
a switching circuit; the control end of the switching circuit is connected with the controller, the first end of the switching circuit is used for being connected with a power supply, and the second end of the switching circuit is used for being connected with the heating coil;
the current sampling circuit is used for collecting a working current signal of the heating coil and transmitting the working current signal to the controller;
and the temperature sampling circuit is used for acquiring a temperature signal of the workpiece to be heated and transmitting the temperature signal to the controller.
The type of the controller is not limited, and can be set according to the actual application condition. For example, it may be a general-purpose Processor including a Central Processing Unit (CPU), a Network Processor (NP), etc.; but may also be a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), an off-the-shelf programmable gate array (FPGA) or other programmable logic device, discrete gate or transistor logic, discrete hardware components, etc. In one particular example, the controller may be a single chip.
The switching circuit is used for being connected with the PWM output end of the controller and executing on-off operation under the control of the PWM signal of the controller, so that the electric signal of the power supply is converted into sine wave alternating current with adjustable frequency and amplitude. The power supply can be a direct current power supply or an alternating current power supply, and a rectifying circuit is connected between the power supply and the switch circuit in series under the condition that the power supply is the alternating current power supply. The heating coil is an induction heating coil, and the sine wave alternating current drives the induction heating coil to work.
The temperature sampling circuit may be any circuit capable of temperature sampling in the art. The current sampling circuit may be any circuit capable of current sampling in the art.
Specifically, the power supply sends the direct current to the switching circuit, the controller outputs a PWM pulse signal to the switching circuit through the PWM output port, and the direct current is converted into sinusoidal alternating current with adjustable frequency and amplitude through the switching signal under the control of the pulse signal. The controller receives an operating current signal (specifically, a current phase of the operating current) fed back by the current sampling circuit and a temperature signal fed back by the temperature sampling circuit. The controller can adjust the frequency of the alternating current according to the working current signal, so that the phase difference between the current phase and the output voltage is minimum, and the amplitude of the output voltage is adjusted according to the temperature signal, so that the temperature approaches to a set value. It should be noted that adjusting the frequency of the alternating current according to the operating current signal and adjusting the amplitude of the output voltage according to the temperature signal are common technical means in the art.
The drive control circuit of the heating device can acquire more working condition information through the temperature signal acquired by the temperature sampling circuit and the working current signal acquired by the current sampling circuit so that the controller can further control the switch circuit, thereby adjusting the frequency of the alternating current and the amplitude of the output voltage and further providing hardware support for accurate temperature control of the drive control circuit.
In one embodiment, as shown in fig. 2, there is provided a driving control circuit of a heating apparatus, including:
a controller;
a switching circuit; the control end of the switching circuit is connected with the controller, the first end of the switching circuit is used for being connected with a power supply, and the second end of the switching circuit is used for being connected with the heating coil;
the current sampling circuit is used for collecting a working current signal of the heating coil and transmitting the working current signal to the controller;
and the temperature sampling circuit is used for acquiring a temperature signal of the workpiece to be heated and transmitting the temperature signal to the controller.
The switching value interface circuit is also included;
one end of the switching value interface circuit is connected with the controller, and the other end of the switching value interface circuit is used for connecting auxiliary equipment; the auxiliary equipment comprises any one or more of the following equipment: cabin door on-off mechanism, start and stop vacuum pump, protection air valve, admission valve, discharge valve and fan.
Specifically, the auxiliary operation can be realized through the switching value interface circuit, and comprises the steps of opening and closing the cabin door, starting and stopping the vacuum pump, opening and closing the protective gas valve, opening and closing the air inlet valve, opening and closing the exhaust valve, opening and closing the fan and the like. Meanwhile, the workpiece body actively heats, the heated area is concentrated on the surface layer of the workpiece, and the heat energy utilization rate is high.
In one embodiment, the switching circuit comprises a driving circuit and an IGBT module;
one end of the driving circuit is connected with the controller, and the other end of the driving circuit is connected with the first end of the IGBT module; the second end of the IGBT module is used for being connected with the heating coil, and the third end of the IGBT module is used for being connected with a power supply.
Specifically, the PWM output end of the controller is connected to a driving circuit, and the driving circuit controls the on-off of the IGBT module; the IGBT module inverts direct current provided by a power supply into sine waves with adjustable frequency and amplitude under the control of the controller, and therefore the induction heating coil is driven. In one specific example, the IGBT module includes 4 IGBT tubes, constituting an H full bridge drive heating coil.
In one embodiment, as shown in fig. 3, there is provided a driving control circuit of a heating apparatus, including:
a controller;
a switching circuit; the control end of the switching circuit is connected with the controller, the first end of the switching circuit is used for being connected with a power supply, and the second end of the switching circuit is used for being connected with the heating coil;
the current sampling circuit is used for collecting a working current signal of the heating coil and transmitting the working current signal to the controller;
and the temperature sampling circuit is used for acquiring a temperature signal of the workpiece to be heated and transmitting the temperature signal to the controller.
The switching value interface circuit is also included;
one end of the switching value interface circuit is connected with the controller, and the other end of the switching value interface circuit is used for connecting auxiliary equipment; the auxiliary equipment comprises any one or more of the following equipment: cabin door on-off mechanism, start and stop vacuum pump, protection air valve, admission valve, discharge valve and fan.
The monitoring alarm circuit is also included;
the first end of the monitoring alarm circuit is connected with the controller, the second end of the monitoring alarm circuit is connected with the switch circuit, and the third end of the monitoring alarm circuit is connected with the current sampling circuit.
Specifically, a working current signal obtained by sampling the current through the current sampling circuit is sent to an ADC input interface of the controller and the monitoring alarm circuit; the monitoring alarm circuit sends the current zero-crossing and alarm information to a digital quantity input interface of the controller.
In one embodiment, the monitoring alarm circuit comprises a processor and a comparator;
the first input end of the comparator is connected with the current sampling circuit, the second input end of the comparator is grounded, and the output end of the comparator is connected with the processor; the processor is respectively connected with the switch circuit and the controller.
Specifically, the zero-crossing time of the working current signal is judged by the comparator, and the processor can be a CPLD. The zero-crossing time may be used to adjust the phase of the output current. Furthermore, the monitoring alarm circuit can also monitor faults such as overcurrent of the main loop, overheating of the IGBT module and the like, and the signals are sent to the controller for alarming and protection actions on one hand, and on the other hand, the output of the driving circuit of the IGBT module is directly forbidden so as to accelerate the speed of the protection actions.
In one embodiment, as shown in fig. 4, the current sampling circuit includes a current transformer and a signal conditioning circuit;
the signal conditioning circuit is respectively connected with the current transformer and the controller; the current transformer is used for collecting working current signals.
The signal conditioning circuit may be any one of the signal conditioning circuits in the art. The sampling current is sampled by a high-frequency current transformer, filtered and converted by a signal conditioning circuit, and the working current signal is sent to an ADC input interface of the controller. Furthermore, the signal conditioning circuit is also connected with a monitoring alarm circuit, and the working current signal is also output to the monitoring alarm circuit.
In one embodiment, as shown in fig. 4, the temperature sampling circuit includes a temperature sensor and a signal amplifying circuit;
the signal amplifying circuit is respectively connected with the temperature sensor and the controller; the temperature sensor is used for acquiring temperature signals.
Specifically, the temperature of the workpiece is detected by a temperature sensor, converted into a voltage signal by a signal amplifying circuit and sent to a controller through an ADC interface. The temperature sensor may be an infrared temperature sensor.
In one embodiment, as shown in fig. 5, the digital signal processor further comprises a digital interface circuit;
one end of the digital quantity interface circuit is used for connecting the PLC control equipment, and the other end of the digital quantity interface circuit is connected with the controller.
Specifically, controllers such as a PLC are connected with the controller through a digital interface circuit, so that the starting and stopping of the heating process and the switching on and off of auxiliary equipment are controlled.
In one embodiment, as shown in fig. 5, the device further comprises a communication interface circuit;
one end of the communication interface circuit is used for connecting an upper computer, and the other end of the communication interface circuit is connected with a controller.
Specifically, the communication interface circuit includes an ethernet port and an RS485 serial port. The communication interface circuit is used for the configuration, setting and monitoring of the brazing furnace by an upper computer. The drive control circuit is provided with a communication interface, and operating parameters can be configured and set through the interface; the device has multiple working modes of shutdown, constant temperature adjustment, temperature adjustment according to curves and the like; in addition, the system is also provided with a digital quantity interface, can interact with an external PLC and is convenient to integrate to an automatic production line.
In one embodiment, a display is also provided; the display is connected with the controller.
In particular, the display may include one or more of a television, a computer display, a head-mounted display, a broadcast reference monitor, a Liquid Crystal Display (LCD) screen, a Light Emitting Diode (LED) based display, an LED backlit LCD display, a Cathode Ray Tube (CRT) display, an Electroluminescent (ELD) display, an electronic paper/ink display, a plasma display panel, an Organic Light Emitting Diode (OLED) display, a Thin Film Transistor (TFT) display, a High Performance Addressing (HPA) display, surface-conduction electron-emitting displays, quantum dot displays, interferometric modulator displays, volume-scanning displays, carbon nanotube displays, zoom mirror displays, emission wavelength displays, laser displays, holographic displays, light field displays, walls, three-dimensional displays, electronic ink displays, and any other electronic device for outputting visual information. The display may comprise or be part of a touch screen. In one embodiment, the display comprises a touch screen.
In an embodiment, there is also provided a brazing furnace comprising a drive control circuit of a heating apparatus as claimed in any one of the preceding claims. Specifically, the drive control circuit includes: a controller;
a switching circuit; the control end of the switching circuit is connected with the controller, the first end of the switching circuit is used for being connected with a power supply, and the second end of the switching circuit is used for being connected with the heating coil;
the current sampling circuit is used for collecting a working current signal of the heating coil and transmitting the working current signal to the controller;
and the temperature sampling circuit is used for acquiring a temperature signal of the workpiece to be heated and transmitting the temperature signal to the controller.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the utility model. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present invention should be subject to the appended claims.
Claims (10)
1. A drive control circuit of a heating apparatus, characterized by comprising:
a controller;
a switching circuit; the control end of the switching circuit is connected with the controller, the first end of the switching circuit is used for being connected with a power supply, and the second end of the switching circuit is used for being connected with the heating coil;
the current sampling circuit is used for collecting a working current signal of the heating coil and transmitting the working current signal to the controller;
and the temperature sampling circuit is used for acquiring a temperature signal of the workpiece to be heated and transmitting the temperature signal to the controller.
2. The drive control circuit of the heating apparatus according to claim 1, further comprising a switching amount interface circuit;
one end of the switching value interface circuit is connected with the controller, and the other end of the switching value interface circuit is used for connecting auxiliary equipment; wherein the auxiliary equipment comprises any one or more of the following equipment: cabin door on-off mechanism, start and stop vacuum pump, protection air valve, admission valve, discharge valve and fan.
3. The drive control circuit of the heating apparatus according to claim 1, wherein the switching circuit includes a drive circuit and an IGBT module;
one end of the driving circuit is connected with the controller, and the other end of the driving circuit is connected with the first end of the IGBT module; and the second end of the IGBT module is used for connecting the heating coil, and the third end of the IGBT module is used for connecting the power supply.
4. The drive control circuit of the heating apparatus according to claim 1, further comprising a monitoring alarm circuit;
the first end of the monitoring alarm circuit is connected with the controller, the second end of the monitoring alarm circuit is connected with the switch circuit, and the third end of the monitoring alarm circuit is connected with the current sampling circuit.
5. The drive control circuit of the heating apparatus according to claim 4, wherein the monitoring alarm circuit includes a processor and a comparator;
the first input end of the comparator is connected with the current sampling circuit, the second input end of the comparator is grounded, and the output end of the comparator is connected with the processor; the processor is respectively connected with the switch circuit and the controller.
6. The drive control circuit of the heating apparatus according to claim 1, wherein the current sampling circuit includes a current transformer and a signal conditioning circuit;
the signal conditioning circuit is respectively connected with the current transformer and the controller; the current transformer is used for collecting the working current signal.
7. The drive control circuit of the heating apparatus according to claim 1, wherein the temperature sampling circuit includes a temperature sensor and a signal amplification circuit;
the signal amplification circuit is respectively connected with the temperature sensor and the controller; the temperature sensor is used for acquiring the temperature signal.
8. The drive control circuit of the heating apparatus according to claim 1, further comprising a digital quantity interface circuit;
one end of the digital quantity interface circuit is used for connecting a PLC control device, and the other end of the digital quantity interface circuit is connected with the controller.
9. The drive control circuit of the heating apparatus according to claim 1, further comprising a communication interface circuit;
one end of the communication interface circuit is used for connecting an upper computer, and the other end of the communication interface circuit is connected with the controller.
10. A brazing furnace, characterized by comprising a drive control circuit of the heating apparatus according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220862169.8U CN217096053U (en) | 2022-04-14 | 2022-04-14 | Drive control circuit of heating equipment and brazing furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220862169.8U CN217096053U (en) | 2022-04-14 | 2022-04-14 | Drive control circuit of heating equipment and brazing furnace |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217096053U true CN217096053U (en) | 2022-08-02 |
Family
ID=82583143
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220862169.8U Active CN217096053U (en) | 2022-04-14 | 2022-04-14 | Drive control circuit of heating equipment and brazing furnace |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217096053U (en) |
-
2022
- 2022-04-14 CN CN202220862169.8U patent/CN217096053U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP2929284B2 (en) | Impedance matching and power control system for high frequency plasma processing equipment | |
| JPH06113561A (en) | Circuit device for power supply to plasma and apparatus of surface technique | |
| CN217096053U (en) | Drive control circuit of heating equipment and brazing furnace | |
| CN110086372B (en) | Microwave power source for coating | |
| EP1507447A2 (en) | Power supply system for liquid crystal monitors | |
| KR960006602B1 (en) | High frequency wave induction heating device using igbt | |
| CN109871049B (en) | Multi-zone temperature control system of hot forming equipment | |
| CN210351100U (en) | PWM (pulse-width modulation) adjusting and driving device for power amplifier circuit of ultrasonic generator | |
| CN111347127B (en) | Cold welding control circuit and method and argon arc welding machine | |
| CN209390403U (en) | It is a kind of for promoting the microwave source system of microwave output stability | |
| CN208638246U (en) | A kind of stepless-adjustment nodal pattern PWM wave signal driving instrument | |
| CN106873712B (en) | Radio frequency generator control circuit and radio frequency generator | |
| CN211720773U (en) | Portable airplane outfield composite microwave repair equipment | |
| CN201900365U (en) | Multi-purpose electric welding machine allowing AC power supply and DC power supply | |
| CN114649963A (en) | HiPIMS power supply system based on spectrum feedback control | |
| CN215186462U (en) | Ultrasonic drive circuit with adjustable frequency amplitude | |
| CN206807270U (en) | A kind of multi-path digital ultrasonic-frequency power supply | |
| TW523801B (en) | Power device, semiconductor production tool using the same and manufacturing method of semiconductor wafer | |
| CN1126974C (en) | Device and method for regulating background light of display | |
| CN101457474B (en) | Low-temperature plasma electrical source for loomage surface modification and control method thereof | |
| TWM495937U (en) | Induction heating control device | |
| CN216929175U (en) | High-voltage generating device of ion fan | |
| CN203843346U (en) | Inversion welding power supply | |
| CN217394003U (en) | Cold welding isolation signal machine | |
| CN219560753U (en) | Handheld laser cleaning control system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |