CN107790840B - Electronic control system for global universal wide voltage input electric soldering iron - Google Patents
Electronic control system for global universal wide voltage input electric soldering iron Download PDFInfo
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- CN107790840B CN107790840B CN201711330471.9A CN201711330471A CN107790840B CN 107790840 B CN107790840 B CN 107790840B CN 201711330471 A CN201711330471 A CN 201711330471A CN 107790840 B CN107790840 B CN 107790840B
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- voltage
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- main control
- control module
- power
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K3/00—Tools, devices, or special appurtenances for soldering, e.g. brazing, or unsoldering, not specially adapted for particular methods
- B23K3/02—Soldering irons; Bits
- B23K3/03—Soldering irons; Bits electrically heated
- B23K3/033—Soldering irons; Bits electrically heated comprising means for controlling or selecting the temperature or power
Abstract
An electronic control system of an electric soldering iron with universal voltage input relates to the technical field of control circuits of electric soldering irons. The utility model provides a solve current electric iron control circuit and have adaptation difference, temperature control is not accurate enough, the technique of function singleness is not enough, including the power input, the power input is connected with voltage accuse width of cloth circuit and main control power supply circuit respectively, voltage control width of cloth circuit connection generates heat the core power supply, main control power supply circuit connection main control module power supply, main control module connects control voltage control width of cloth circuit, main control module still is connected with the sampling circuit that is used for peak value detection and sinusoidal voltage detection between power input, main control module still is connected with the temperature sensing circuit to the core temperature detection that generates heat. The power supply can be used in 85V-264V sinusoidal alternating current mains supply, is suitable for the mains supply of all countries worldwide, and the main control module adjusts the duty ratio of the voltage amplitude control circuit according to a preset program according to the peak value of working voltage, sinusoidal voltage and the temperature of the heating core, so that the heating core can be ensured to be in constant preset power and is not influenced by input voltage.
Description
Technical Field
The invention relates to the technical field of control circuits of electric soldering irons.
Background
The existing electric soldering iron temperature control circuit is generally shown in the working principle shown in fig. 1, 220V alternating voltage is output after being reduced, rectified and stabilized, one path of the 220V alternating voltage is used as the input direct voltage of the TL431 type three-terminal voltage-stabilizing integrated circuit, and the other path of the 220V alternating voltage is used for providing control voltage for the TL431 type three-terminal voltage-stabilizing integrated circuit after being divided by the thermistor Rr, the resistor R3 and the adjustable resistor Rp. When the measured temperature is lower than the set temperature of the adjustable resistor Rp, the electric heater EH is electrified to start heating, and when the measured temperature is higher than the set temperature of the adjustable resistor Rp along with the continuous rising of the temperature, the electric heater EH is powered off to stop heating, so that the electric heater EH is circularly controlled to be started or closed according to the change of the temperature, and the measured temperature is controlled to be within a set range.
The defects of the existing control circuit include: 1. the voltage is low and the temperature is not controlled (because the heating core is a single voltage input, when the input voltage is far below the rated voltage of the heating core, the heating core is always heated), and a machine is damaged by high voltage (power supply can be caused by excessive voltage and key elements are damaged directly); 2. inaccurate temperature (temperature is not accurate enough because the linearity problem of the heating element is not compensated for; 3. the functions are single, no dormancy, no temperature compensation, no authority management, no Fahrenheit conversion and the like.
Disclosure of Invention
In summary, the invention aims to solve the technical defects of poor adaptation, inaccurate temperature control and single function of the existing electric soldering iron control circuit, and provides an electric soldering iron electronic control system with global universal voltage input.
In order to solve the technical problems, the invention adopts the following technical scheme:
the electronic control system for the electric soldering iron is characterized by comprising a power input end for rectifying an accessed 85V-264V sinusoidal alternating current commercial power into pulsating voltage and outputting the pulsating voltage, wherein the power input end is respectively connected with a voltage amplitude control circuit and a main control power circuit, the voltage amplitude control circuit is connected with a heating core for supplying power, the main control power circuit is connected with a main control module for supplying power, the main control module is connected with a control voltage amplitude control circuit, a sampling circuit for peak value detection and sinusoidal voltage detection is further connected between the main control module and the power input end, the main control module is further connected with a temperature sensing circuit for detecting the temperature of the heating core, and the main control module controls the voltage amplitude control circuit to supply power for the heating core according to the sampling circuit and the temperature sensing circuit.
The voltage amplitude control circuit is a chopper circuit formed by MOS tubes controlled by pulse width modulation signals of a main control module.
The main control module comprises a voltage signal comparator connected with the sampling circuit, a control IC connected with the voltage signal comparator, and a PWM (pulse-width modulation) module, an MOS (metal oxide semiconductor) tube driving circuit, a reference voltage circuit and a power compensation circuit which are respectively connected with the control IC.
The main control module is also connected with a vibration switch.
The main control module is also connected with a display module.
The beneficial effects of the invention are as follows: the invention can be used in 85V-264V sinusoidal alternating current mains supply, is suitable for the mains supply of all countries worldwide, and the main control module adjusts the duty ratio of the voltage amplitude control circuit according to the peak value of working voltage, sinusoidal voltage and heating core temperature and a preset program, thereby ensuring that the heating core can be in constant preset power and is not influenced by input voltage.
The problems that the input voltage of the existing electric soldering iron is single, the voltage fluctuation cannot be too large, the input power changes along with the change of the voltage, the application field and the area are small, the amplitude of the voltage fluctuation is too large, and the equipment is damaged are solved; the invention makes the input voltage range wider, makes the used field and area wider, such as a plurality of countries, cities, remote areas, even under severe environment (the voltage fluctuation range is extremely large), can be normally used.
Drawings
FIG. 1 is a schematic diagram of a conventional electric soldering iron temperature control circuit;
FIG. 2 is a waveform diagram of the power input before and after rectification according to the present invention;
FIG. 3 is a waveform diagram of the voltage amplitude control circuit of the present invention after rectifying the voltage and performing programmable amplitude control;
FIG. 4 is a schematic block diagram of the circuit principle of the present invention;
fig. 5 is a schematic circuit diagram of one embodiment of the present invention.
Detailed Description
The structure of the present invention will be further described with reference to the drawings and preferred embodiments of the present invention.
Referring to fig. 2 to 5, the electronic control system for the electric soldering iron with global wide voltage input comprises a power input end for rectifying an accessed 85V-264V sinusoidal alternating current commercial power into pulsating voltage output, wherein the power input end is respectively connected with a voltage amplitude control circuit and a main control power circuit, the voltage amplitude control circuit is connected with a heating core for supplying power, the main control power circuit is connected with a main control module for supplying power, the main control module is connected with a control voltage amplitude control circuit, a sampling circuit for peak detection and sinusoidal voltage detection is further connected between the main control module and the power input end, the main control module is further connected with a temperature sensing circuit for detecting the temperature of the heating core, and the main control module controls the voltage amplitude control circuit to supply power for the heating core according to the sampling circuit and the temperature sensing circuit.
The main control module can be composed of a voltage signal comparator connected with the sampling circuit, a control IC connected with the voltage signal comparator, and a PWM (pulse-width modulation) module, a MOS (metal oxide semiconductor) tube driving circuit, a reference voltage circuit and a power compensation circuit which are respectively connected with the control IC. As shown in fig. 5, the main control module adopts a singlechip IC2 with the model number STM 8-32; the sampling circuit consists of a resistor R14, a resistor R15 and a resistor R16; the voltage amplitude control circuit is a chopper circuit formed by an MOS tube Q1 controlled by a pulse width modulation signal of a main control module, and the MOS tube Q1 is driven by a singlechip IC2 through an MOS tube driving circuit formed by a triode Q2.
When the input voltage of the power supply input end changes within the range of 85V-264V, the change of the zero point and the highest point of the sinusoidal voltage can cause the output power and the voltage amplitude to change, the sampling sinusoidal voltage of the sampling circuit changes along with the change, the acquired voltage signal is compared with the reference voltage to generate an error signal, the chopping processing is carried out on the parameters after the power compensation, and the parameters are chopped to be higher than the reference voltage value, as shown in figure 3.
The chopping is to control the switch of the MOS transistor Q1 to chop the reference voltage value higher than the set reference voltage value after the duty ratio width of the PWM module in the main control module is regulated, which is the regulation process after the temperature reaches a constant state.
Because the power supply of the heating core is the output voltage of the voltage amplitude control circuit, the duty ratio of the PWM module is adjusted, and the temperature sensing circuit and the error signal value are also interposed at the same time to adjust the duty ratio of the PWM module.
Overvoltage and undervoltage protection, namely when the voltage value of the peak value is higher than the 264V reference voltage value, the main control module turns off the output of the PWM module, the MOS tube Q1 is disconnected, and the main control module simultaneously sends an overvoltage signal prompt signal.
Otherwise, when the detected sine voltage value is lower than the 85V reference voltage value, the main control module turns off the output of the PWM module, the MOS tube Q1 is disconnected, and an undervoltage protection prompt signal is sent at the same time.
The main control power supply circuit comprises: 1) And (3) a main power supply: the main power supply adopts an SM7015/SM 7012.AC-DC PWM power switch power supply in the case, and the main components comprise an IC SM7015/SM 7012M 7 diode, a UF4005 freewheeling diode, an energy storage inductance L and a filter capacitor, so that a +12V output power supply is obtained, and a power supply is provided for driving the MOS tube Q1.
2) The auxiliary power supply consists of 78L05 three-terminal integrated voltage stabilizer, and +5V output power supply provides working power supply for the main control module.
As shown in fig. 5, the main control module is connected with a display module for displaying humidity, a control switch S1 and a control switch S2 for adding or subtracting the temperature of the heating core, and a vibration switch S3; and when the S3 is unchanged within the preset time, the main control module is in a dormant state, and the MOS tube Q1 is controlled to be disconnected.
The technical scheme of the invention is as follows: 1. the input voltage range is wider, the used field and region are wider, such as a plurality of countries, cities and remote regions, and the device can be normally used even in severe environments (the voltage fluctuation range is extremely large). 2. There are under-voltage and over-voltage protection, and the rated voltage of the heating core is changed according to the difference of the voltages. 3. The problem that a machine is damaged due to high voltage and low temperature uncontrollable voltage is solved; 4. solving the problem of inaccurate temperature; 5. the problems of single function, no dormancy, no temperature compensation, no authority management, no Fahrenheit conversion and the like are solved.
Claims (3)
1. The electronic control system for the electric soldering iron is characterized by comprising a power input end for rectifying an accessed 85V-264V sinusoidal alternating current commercial power into pulsating voltage and outputting the pulsating voltage, wherein the power input end is respectively connected with a voltage amplitude control circuit and a main control power circuit; the voltage amplitude control circuit is a chopper circuit formed by MOS tubes controlled by pulse width modulation signals of a main control module; the main control module is also connected with a display module.
2. The global universal voltage input electronic control system for soldering iron of claim 1, wherein: the main control module comprises a voltage signal comparator connected with the sampling circuit, a control IC connected with the voltage signal comparator, and a PWM (pulse-width modulation) module, an MOS (metal oxide semiconductor) tube driving circuit, a reference voltage circuit and a power compensation circuit which are respectively connected with the control IC.
3. The global universal voltage input electronic control system for soldering iron of claim 1, wherein: the main control module is also connected with a vibration switch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711330471.9A CN107790840B (en) | 2017-12-13 | 2017-12-13 | Electronic control system for global universal wide voltage input electric soldering iron |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711330471.9A CN107790840B (en) | 2017-12-13 | 2017-12-13 | Electronic control system for global universal wide voltage input electric soldering iron |
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| CN107790840A CN107790840A (en) | 2018-03-13 |
| CN107790840B true CN107790840B (en) | 2023-05-05 |
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| CN201711330471.9A Active CN107790840B (en) | 2017-12-13 | 2017-12-13 | Electronic control system for global universal wide voltage input electric soldering iron |
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| CN110266224A (en) * | 2019-05-31 | 2019-09-20 | 海盐迪兰电器科技有限公司 | A kind of warm-air drier slew page driver having a display function |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203679477U (en) * | 2013-12-11 | 2014-07-02 | 重庆市翼珑蝶科技有限公司 | Constant-temperature control circuit for internal heating electric soldering iron |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2006026683A (en) * | 2004-07-15 | 2006-02-02 | Nippon Avionics Co Ltd | Inverter controlled pulse heat power source |
| CN100431762C (en) * | 2005-06-24 | 2008-11-12 | 深圳斯贝克动力电子有限公司 | Electric soldering iron temperature fast-compensation method and electric soldering iron capable of fast realizing temperature compensation |
| JP4883773B2 (en) * | 2006-08-07 | 2012-02-22 | 日本アビオニクス株式会社 | Pulse heat power supply |
| CN103264244B (en) * | 2013-05-22 | 2014-12-17 | 广州市精源电子设备有限公司 | Thermal compression bonding power source |
| CN103399597B (en) * | 2013-08-11 | 2015-09-09 | 中南林业科技大学 | A kind of intelligent electric flatiron constant temperature control circuit and control method |
| CN103949745A (en) * | 2014-05-13 | 2014-07-30 | 国家电网公司 | Control circuit for ensuring stable work of soldering iron electric heating wire |
| CN104972190A (en) * | 2015-06-30 | 2015-10-14 | 傅明尧 | Constant temperature electric soldering iron heating circuit |
| CN207723658U (en) * | 2017-12-13 | 2018-08-14 | 深圳创新高电子实业有限公司 | The electric iron electronic control system of Global Link Width funtion input |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203679477U (en) * | 2013-12-11 | 2014-07-02 | 重庆市翼珑蝶科技有限公司 | Constant-temperature control circuit for internal heating electric soldering iron |
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