CN109714835A - A kind of electrically heated control method - Google Patents
A kind of electrically heated control method Download PDFInfo
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- CN109714835A CN109714835A CN201910005590.XA CN201910005590A CN109714835A CN 109714835 A CN109714835 A CN 109714835A CN 201910005590 A CN201910005590 A CN 201910005590A CN 109714835 A CN109714835 A CN 109714835A
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- temperature
- plc controller
- heating wire
- electrically connected
- control method
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Abstract
The invention discloses a kind of electrically heated control methods, including PLC controller, PLC controller power supply wiring front end is electrically connected with breaker, the PLC controller is electrically connected with electric heating wire by solid-state relay, the PLC controller is electrically connected with temperature control modules by A/D module, and the installation site of temperature sensor is located in electric heating wire thermal radiation range in the temperature control modules.The electrically heated control method, by the way that temperature control modules are arranged, achieve the effect that adjust heating temperature section in real time, when the heating power of electric heating wire is 1500W, temperature is controlled at 30 DEG C -90 DEG C, it uses PT100 as temperature sensor, controls the heating time of heating wire by solid-state relay using PLC；When the system is operating, when temperature is lower than 30 DEG C, low-temperature warning is issued, when being higher than 90 DEG C, issues high temperature alarm, the numerical value of setting is realized by touch screen, to have the characteristics that soft connection is adjustable.
Description
Technical field
The present invention relates to electric heating control technical fields, more specifically, it relates to a kind of electrically heated control method.
Background technique
Electric heating is at present to metal material heating efficiency highest, fastest, the induction heating of low-loss and energy-saving environment-friendly type
Equipment.Electric heating also known as high frequency heating machine, HF induction heating apparatus, high-frequency induction heating apparatus, high-frequency heating power, height
Frequency power, high frequency furnace.High-frequency welder, high frequency induction heating machine, high frequency induction heater (soldering apparatus) etc., in addition also
There are Intermediate Frequency Induction Heating Equipment, superelevation frequency induction heating equipment etc..Application range is very extensive.
In the heating equipments such as current electric heating wire/pipe, the most of temperature start and stop range that controls all compares fixation, seldom
Equipment there is on-line control temperature alarming start stop apparatus, and in alarm, be all much temperature control device directly and executive component
Between be all rigid connection, calculating between each data conversion is rough simple, is easy error, while the sensing element to interact
It is closer, it is easy to be influenced by electronic component in actual use.
Summary of the invention
In view of the deficiencies of the prior art, the present invention intends to provide a kind of electrically heated control method, tool
There is the characteristics of soft connection is adjustable, it is accurate to calculate, does not interfere with each other.
To achieve the above object, the present invention provides the following technical scheme that
A kind of electrically heated control method, including PLC controller, PLC controller power supply wiring front end are electrically connected
There is breaker, the PLC controller is electrically connected with electric heating wire by solid-state relay.
The PLC controller is electrically connected with temperature control modules, temperature in the temperature control modules by A/D module
The installation site of sensor is located in electric heating wire thermal radiation range.
Further, the PLC of the model FX2N-32MR of PLC controller, the PLC controller are electrically connected with touch
Screen.
Further, the PLC of the model FX2N-32MR of PLC controller, the PLC controller are electrically connected with touch
Screen.
Further, when electric heating wire corresponding device is electric heating kettle, temperature sensor is shielded by cable or multiple twin
Cable is separated as simulation input cable, and with control line and power supply line.
Further, PLC controller includes PID system, and the PID system includes PWM pulsewidth modulation instruction.
In conclusion the invention has the following advantages:
1, by setting temperature control modules, achieved the effect that adjust heating temperature section in real time, when electricity adds
The heating power of heated filament is 1500W, controls temperature at 30 DEG C -90 DEG C, uses PT100 as temperature sensor, passed through using PLC
The heating time of solid-state relay control heating wire；When the system is operating, when temperature is lower than 30 DEG C, low-temperature warning is issued, is higher than
At 90 DEG C, high temperature alarm is issued, the numerical value of setting is realized by touch screen, to have the characteristics that soft connection is adjustable.
It 2, include PID system by the way that PLC controller is arranged, PID system includes PWM pulsewidth modulation instruction, has reached accurate
The effect of control is calculated, in use, connecting start button, system just carries out PID adjusting, and setting value and current value are carried out PID
Operation obtains output valve, the time of the logical point of heating wire is controlled using this output valve, the temperature difference is smaller, and output valve is just smaller, connects
The logical time is shorter；The temperature difference is bigger, and output valve is bigger, and the time of connection is just grown, when temperature deviation is 0, output valve 0,
Heating furnace is just disconnected；One fixed period is set, such as 10 seconds, the time connected with PWM instruction adjust automatically heating wire,
If the temperature difference of system is big, for the output valve that side PID adjusts out with regard to big, turn-on time is long, and the temperature difference is small, the time of connection with regard to short,
Achieve the effect that accurately to adjust, to have the characteristics that accurately calculate.
3, cable or paired shield cable are passed through as simulation input cable by setting temperature sensor, and and control line
And power supply line separates, and has reached non-interfering effect, in use, PT100 sensor is made by cable or paired shield cable
It for simulation input cable, and is separated with control line and power supply line, avoids generating electrical Interference；I=1500W/220V=7A is left
The right side considers floating range I0=1.35*I=9.3A of curent change or so, and the close copper wire of electricity is every square millimeter of 2.5A, so line
Diameter is (9.3/2.5*4/pi)=2.18mm under radical sign, to have the characteristics that not interfereing with each other.
Detailed description of the invention
Fig. 1 is present system main circuit diagram figure；
Fig. 2 is present system schematic diagram figure；
Fig. 3 is that PID system of the present invention adjusts figure figure；
Fig. 4 is PWM pulsewidth modulation instruction figure of the present invention；
Fig. 5 is that kettle of the present invention controls ladder diagram figure；
Fig. 6 is that kettle of the present invention controls ladder diagram figure.
Specific embodiment
Embodiment:
Below in conjunction with attached drawing 1-6, invention is further described in detail.
A kind of electrically heated control method, as shown in Figure 1, including PLC controller, before the PLC controller power supply wiring
End is electrically connected with breaker, and the PLC controller is electrically connected with electric heating wire by solid-state relay；
As shown in Fig. 2, the PLC controller is electrically connected with temperature control modules, the temperature control by A/D module
The installation site of temperature sensor is located in electric heating wire thermal radiation range in module.
As shown in Fig. 2, having reached the effect adjusted in real time to heating temperature section by setting temperature control modules
Fruit, when the heating power of electric heating wire is 1500W, control temperature is used PT100 as temperature sensor, is adopted at 30 DEG C -90 DEG C
The heating time of heating wire is controlled by solid-state relay with PLC；When the system is operating, when temperature is lower than 30 DEG C, low temperature is issued
Alarm when being higher than 90 DEG C, issues high temperature alarm, and the numerical value of setting is realized by touch screen, to have soft connection adjustable
The characteristics of section.
Further, the PLC of the model FX2N-32MR of PLC controller, the PLC controller are electrically connected with touch
Screen.
Further, the PLC of the model FX2N-32MR of PLC controller, the PLC controller are electrically connected with touch
Screen.
Further, as seen in figs. 5-6, when electric heating wire corresponding device is electric heating kettle, temperature sensor passes through electricity
Cable or paired shield cable are separated as simulation input cable, and with control line and power supply line；
As seen in figs. 5-6,1), program flow diagram, after system starting, thermal module is digital quantity temperature inversion, will
The temperature and setting value measured carries out PID adjusting, and the output valve that PID is adjusted instructs the on-off of control heating wire with PWM,
Low temperature and high temperature alarm are controlled with section compare instruction；2), programme diagram, the control require realization, and system is realized respectively by X0, X1
Open, stop controlling, thermal module be No. 0, for by temperature inversion at digital quantity, setting for temperature uses number as 1s.
As seen in figs. 5-6, by setting temperature sensor by cable or paired shield cable as simulation input cable,
And separated with control line and power supply line, reach non-interfering effect, in use, PT100 sensor passes through cable or multiple twin
Shielded cable is separated as simulation input cable, and with control line and power supply line, avoids generating electrical Interference；I=1500W/
220V=7A or so considers that floating range I0=1.35*I=9.3A of curent change or so, the close copper wire of electricity are every square of 2.5A
Millimeter, so line footpath is (9.3/2.5*4/pi)=2.18mm under radical sign, to have the characteristics that not interfereing with each other.
Further, as shown in figure 3, PLC controller includes PID system, the PID system includes that PWM pulsewidth modulation refers to
It enables；
As shown in figure 3, including PID system by the way that PLC controller is arranged, PID system includes PWM pulsewidth modulation instruction, is reached
To the effect for accurately calculating control, in use, connecting start button, system just carries out PID adjusting, setting value and current value
PID arithmetic is carried out, output valve is obtained, the time of the logical point of heating wire is controlled using this output valve, the temperature difference is smaller, and output valve is just
Smaller, turn-on time is shorter；The temperature difference is bigger, and output valve is bigger, and the time of connection is just grown, when temperature deviation is 0, output
Value is 0, and heating furnace is just disconnected；One fixed period is set, such as 10 seconds, is connected with PWM instruction adjust automatically heating wire
Time, if the temperature difference of system is big, for the output valve that side PID adjusts out with regard to big, turn-on time is long, and the temperature difference is small, connection when
Between just it is short, achieve the effect that accurately to adjust, to have the characteristics that accurately calculate；
As shown in Figure 4, wherein (1), in the instruction S indicates to generate the width t (t=0~32767ms) of pulse, and S1 is indicated
The cycle T 0 (T0=1~32767ms) of pulse, and otherwise there is mistake in S≤S1；S2 is the output point of pulse, is only limited to Y0
Or Y1,2) there is pulse output when X000 sets 1, otherwise stop；(2), the utilization of PID instruction, current value are greater than the set value SV
When, execution amount is increased, when current value is less than setting value SV, reduces execution amount.When water temperature is lower than setting value, it is necessary to connect heating
Silk device is to increase water temperature.Realize that direct action, bit=1 are negative actuation as bit=0.
This specific embodiment is only explanation of the invention, is not limitation of the present invention, those skilled in the art
Member can according to need the modification that not creative contribution is made to the present embodiment after reading this specification, but as long as at this
All by the protection of Patent Law in the scope of the claims of invention.
Claims (5)
1. a kind of electrically heated control method, including PLC controller, it is characterised in that: PLC controller power supply wiring front end
It is electrically connected with breaker, the PLC controller is electrically connected with electric heating wire by solid-state relay；
The PLC controller is electrically connected with temperature control modules, temperature sensing in the temperature control modules by A/D module
The installation site of device is located in electric heating wire thermal radiation range.
2. electrically heated control method according to claim 1, it is characterised in that: the model of the PLC controller
The PLC of FX2N-32MR, the PLC controller are electrically connected with touch screen.
3. electrically heated control method according to claim 1, it is characterised in that: the model of the temperature control modules
FX2N-4AD-TC, the model PT100 of the temperature sensor.
4. electrically heated control method according to claim 1, it is characterised in that: the electric heating wire corresponding device is electricity
When heating kettle, temperature sensor by cable or paired shield cable as simulation input cable, and with control line and power supply
Line separates.
5. electrically heated control method according to claim 4, it is characterised in that: the PLC controller includes PID system
System, the PID system include PWM pulsewidth modulation instruction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910005590.XA CN109714835A (en) | 2019-01-03 | 2019-01-03 | A kind of electrically heated control method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910005590.XA CN109714835A (en) | 2019-01-03 | 2019-01-03 | A kind of electrically heated control method |
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| Publication Number | Publication Date |
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| CN109714835A true CN109714835A (en) | 2019-05-03 |
Family
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910005590.XA Pending CN109714835A (en) | 2019-01-03 | 2019-01-03 | A kind of electrically heated control method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110149734A (en) * | 2019-05-30 | 2019-08-20 | 浪潮金融信息技术有限公司 | A kind of pcb board carries intelligent heating circuit and its implementation |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202472450U (en) * | 2011-12-28 | 2012-10-03 | 武汉计算机外部设备研究所 | Full-automatic fuzzy temperature control device |
| CN106227264A (en) * | 2016-08-24 | 2016-12-14 | 成都飞机工业（集团）有限责任公司 | A kind of salt bath furnace temperature control system |
-
2019
- 2019-01-03 CN CN201910005590.XA patent/CN109714835A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202472450U (en) * | 2011-12-28 | 2012-10-03 | 武汉计算机外部设备研究所 | Full-automatic fuzzy temperature control device |
| CN106227264A (en) * | 2016-08-24 | 2016-12-14 | 成都飞机工业（集团）有限责任公司 | A kind of salt bath furnace temperature control system |
Non-Patent Citations (2)
| Title |
|---|
| 百度文库: "《百度文库》", 25 September 2017 * |
| 胡国良: "三菱PLC在电加热与温度控制中的应用", 《河南科技》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110149734A (en) * | 2019-05-30 | 2019-08-20 | 浪潮金融信息技术有限公司 | A kind of pcb board carries intelligent heating circuit and its implementation |
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Application publication date: 20190503 |