CN201583821U - Power regulator control circuit for heating furnace - Google Patents
Power regulator control circuit for heating furnace Download PDFInfo
- Publication number
- CN201583821U CN201583821U CN2009202522180U CN200920252218U CN201583821U CN 201583821 U CN201583821 U CN 201583821U CN 2009202522180 U CN2009202522180 U CN 2009202522180U CN 200920252218 U CN200920252218 U CN 200920252218U CN 201583821 U CN201583821 U CN 201583821U
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- heating furnace
- switching value
- unit
- control circuit
- output unit
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Abstract
The utility model belongs to a power regulator control circuit for a heating furnace, which is technically characterized by comprising a DSP control unit, a synchronous voltage collection unit, a switching value input unit, a switching value output unit, an analog quantity input unit and an analog quantity output unit which are all connected, wherein the synchronous voltage collection unit is connected with a heating furnace master control circuit power source, input ends of the switching value input unit and the analog quantity input unit are respectively connected with switching value signals and analog quantity signals of a heating furnace master control circuit, and output ends of the switching value output unit and the analog quantity output unit respectively output switching value signals and analog quantity signals and are connected with the heating furnace master control circuit. The power controller circuit has reasonable design, adopts the 16-bit DSP control unit to achieve accurate control functions to the heating furnace, and has the advantages of high control precision, short prolonged time, strong anti-disturbance capability, easy monitor and the like. The power controller circuit satisfies requirements controlled under different output powers, and can be applicable to systems requiring temperature control, such as heating furnaces.
Description
Technical field
The utility model belongs to the heating furnace field, especially a kind of power regulating eqiupment control circuit that is used for heating furnace.
Background technology
At present, use furnace apparatus in a large number in industrial processes such as metallurgy, chemical industry, and the power regulation device that is used to control the heating furnace output power has obtained also using widely.The output power that power regulating eqiupment adopts thyristor and trigger circuit control heating furnace thereof usually realizes the Control for Kiln Temperature system is controlled.The problem that the power regulating eqiupment control circuit of existing heating furnace exists is: 1, processing speed is slow: because the primary precondition of the reliable triggering of governor circuit thyristor is that circuit is accurately gathered the synchronizing signal zero crossing of voltage, existing single chip circuit all uses 8 single-chip microcomputers, there are shortcomings such as execution speed is slow, the built-in command cycle is long, therefore in synchronous signal acquisition, causing delay easily, make the triggering starting point lag behind voltage over zero, cause non-zero cross fired, cause consequences such as harmonic wave generation; 2, sampling precision is low: the control circuit that constitutes owing to single-chip microcomputer is generally 8 bit data precision, and is relatively poor to outside current sample precision, can't accurately detect the running status of power regulating eqiupment; 3, comprehensive treatment capability is poor: because the control circuit that single-chip microcomputer constitutes is not only as central processing system, and send part as the instruction of external control signal, can't accomplish real-time processing, can only adopt the way of time-division processing, therefore can not accomplish real-time detection for the catastrophic failure signal of outside, perhaps can only carry out simple fault detect, reduce the comprehensive treatment capability of power regulating eqiupment.
Summary of the invention
The purpose of this utility model is to overcome the deficiencies in the prior art, and the power regulating eqiupment control circuit that is used for heating furnace that a kind of processing speed is fast, sampling precision is high, comprehensive treatment capability is strong is provided.
The utility model solves its technical matters and takes following technical scheme to realize:
A kind of power regulating eqiupment control circuit that is used for heating furnace, by DSP control module and synchronizing voltage collecting unit, the switching value input block, the switching value output unit, analog input unit and analog quantity output unit connect and compose, the synchronizing voltage collecting unit is connected with heating furnace governor circuit power supply, the switching value input block, the input end of analog input unit is connected with analog signals with the switching value signal of heating furnace governor circuit respectively, and the output terminal of switching value output unit and analog quantity output unit is exported the switching value signal respectively and is connected with analog signals and with the heating furnace governor circuit.
And described DSP control module also connects a display unit by the I/O interface.
And described DSP control module adopts 16 bit DSP chips.
And described synchronizing voltage collecting unit is made of photoelectric isolated chip, and its input end is connected with heating furnace governor circuit power supply.
And described analog input unit is made of operational amplifier and I/V change-over circuit; Described analog quantity output unit is connected and composed by the D/A conversion chip.
And described analog input unit connects 5 tunnel analog quantity input signals; The analog quantity output unit is exported 2 road analog signalses.
And described switching value input block and switching value output unit constitute by the gate circuit buffer circuit.
And described switching value input block connects 4 way switch amount input signals; Described switching value output unit is exported 4 way switch amount signals.
Advantage of the present utility model and good effect are:
1, this power regulating eqiupment control circuit employing DSP control module can be gathered the synchronous voltage signal in the heating furnace governor circuit exactly, switching value signal and analog signals and by after the dsp chip analyzing and processing output control signal corresponding with control heating furnace output power, thereby reach the temperature control function of control heating furnace, because employing 16 bit DSP chips can be quick, carry out data acquisition and output control exactly, have electrical network nuisanceless, no harmonic wave, Cos φ is bordering on 1, frequency self-adaption, characteristics such as control accuracy height have satisfied the requirement of different capacity control.
2, the synchronizing voltage collecting unit of this power regulating eqiupment control circuit adopts photoelectric isolating device to be connected to and exchanges 380V governor circuit power supply, be transformed into ac small signal by damping resistance and operational amplifier, be sent to the DSP control module after isolating through photoelectricity again, have short characteristics time delay, realized complete zero cross fired function.
3, the switching value input block of this power regulating eqiupment control circuit and switching value output unit adopt gate circuit buffering outside various logic signal of connection and warning, combined floodgate, sub-gate signal, have the advantages that transmission delay is little, antijamming capability is strong.
4, this power regulating eqiupment control circuit is provided with display module, can show signals such as present output power number percent and fault alarm in real time, has realized monitoring the function of the operation of heating furnace, and has been convenient in time find the operation troubles of heating furnace.
5, the utility model is reasonable in design, adopt the accurate control function of 16 bit DSP control modules realization to heating furnace, have that control accuracy height, time delay are short, antijamming capability is strong and be easy to characteristics such as supervision, satisfied the requirement of different output power control, can be widely used in the temperature controlled system of needs such as heating furnace.
Description of drawings
Fig. 1 is a circuit block diagram of the present utility model;
Fig. 2 is a schematic block circuit diagram of the present utility model.
Embodiment
Below in conjunction with accompanying drawing the utility model embodiment is further described.
A kind of power regulating eqiupment control circuit that is used for heating furnace, as shown in Figure 1, pass through I/O interface and synchronizing voltage collecting unit by the DSP control module, the switching value input block, the switching value output unit, analog input unit and analog quantity output unit and display unit connect and compose, the synchronizing voltage collecting unit is connected with heating furnace governor circuit power supply, the switching value input block, the input end of analog input unit is connected with analog signals with the switching value signal of heating furnace governor circuit respectively, and the output terminal of switching value output unit and analog quantity output unit is exported the switching value signal respectively and is connected with analog signals and with the heating furnace governor circuit.In the present embodiment, the DSP control module adopts 16 bit DSP chips, its core as the power regulating eqiupment control circuit is gathered synchronous voltage signal, switching value signal and analog signals in the heating furnace governor circuit by synchronizing voltage collecting unit, switching value input block, analog input unit, the DSP control module by the above-mentioned signal of gathering is analyzed with computing after, by switching value output unit, analog quantity output unit output switching value signal and analog signals, realize control to the heating furnace governor circuit.The DSP control module can show signals such as present output power number percent and fault alarm by display unit.
Shown in Figure 2 be the schematic block circuit diagram of a kind of embodiment, in the present embodiment, the DSP control module is 16 bit DSP chips, the synchronizing voltage collecting unit is 2 tunnel input Uab and Ucb, this input end Uab and Ucb are connected to 380V heating furnace governor circuit power supply; The switching value input block is the inputs of 4 way switch amounts, and 4 way switch amount signals of its connection are: Contact, M/A, Hot, oc; The switching value output unit is the outputs of 4 way switch amounts, can export 4 way switch amount signals; Analog input unit is the inputs of 5 tunnel analog quantitys, and the analog signals of its connection is: IA, IB, IC, 0～10V, 4～20mA; The analog quantity output unit is the outputs of 2 tunnel analog quantitys, and the analog signals of its output is: 0～10V, 4～20mA.
The synchronizing voltage collecting unit is made of photoelectric isolated chip TLP521-1, its input end is connected with 380V heating furnace governor circuit power supply, convert the alternating voltage small-signal later on to through resistance decrement and operational amplifier, again through forming the square-wave signal identical behind the photoelectric isolated chip TLP521-1 with the governor circuit electric voltage frequency, and send into the cap capture channel of dsp chip, dsp chip carries out the seizure of rising edge to this square wave, with the starting point of this rising edge starting point, finish triggering work as zero cross fired.This synchronizing voltage collecting unit adopts difference method to be connected directly to and exchanges the 380V power supply, and adopts in advance the detection line voltage method to handle, and has short characteristics time delay, has realized that simultaneously zero triggers function.
Analog input unit constitutes an analog quantity input buffering and a holding circuit by operational amplifier LM224 and I/V change-over circuit; it can connect 5 tunnel analog quantity input signals such as Ia, Ib, Ic, 0～10V, 4～20mA; for 0～10V, 4～20mA through the I/V change-over circuit; again analog signals is sent into the A/D passage of DSP control module; the DSP control module calculates the number percent of output power by the sampling to voltage signal, thereby regulates the number percent of turn-on cycle.The analog quantity output unit is connected and composed by 10 D/A conversion chip TLV5604, can export the analog signals of 0～10V after being handled by dsp chip.
Switching value input block and switching value output unit constitute by the 74HC4245 gate circuit, this input and output buffer circuit with the combined floodgate in the heating furnace governor circuit, overcurrent, overheated, manually reach switching value signal such as automatic and input to the DSP control module, the DSP control module according to normally whether exporting of current running status be ready to, status signal such as operation, overheated, overcurrent.
Display unit mainly is made of display driver chip HD7279a and group of four figures pipe, it can show signals such as output power number percent in the course of work and fault alarm on display unit, realize the real-time Presentation Function of the duty of power regulating eqiupment control circuit.
Embodiment described in the utility model is illustrative; rather than it is determinate; therefore the utility model is not limited to the embodiment described in the embodiment; every by those skilled in the art according to other embodiments that the technical solution of the utility model draws, belong to the scope of the utility model protection equally.
Claims (8)
1. power regulating eqiupment control circuit that is used for heating furnace, it is characterized in that: by DSP control module and synchronizing voltage collecting unit, the switching value input block, the switching value output unit, analog input unit and analog quantity output unit connect and compose, the synchronizing voltage collecting unit is connected with heating furnace governor circuit power supply, the switching value input block, the input end of analog input unit is connected with analog signals with the switching value signal of heating furnace governor circuit respectively, and the output terminal of switching value output unit and analog quantity output unit is exported the switching value signal respectively and is connected with analog signals and with the heating furnace governor circuit.
2. the power regulating eqiupment control circuit that is used for heating furnace according to claim 1 is characterized in that: described DSP control module also connects a display unit by the I/O interface.
3. the power regulating eqiupment control circuit that is used for heating furnace according to claim 1 and 2 is characterized in that: described DSP control module adopts 16 bit DSP chips.
4. the power regulating eqiupment control circuit that is used for heating furnace according to claim 1 and 2 is characterized in that: described synchronizing voltage collecting unit is made of photoelectric isolated chip, and its input end is connected with heating furnace governor circuit power supply.
5. the power regulating eqiupment control circuit that is used for heating furnace according to claim 1 and 2 is characterized in that: described analog input unit is made of operational amplifier and I/V change-over circuit; Described analog quantity output unit is connected and composed by the D/A conversion chip.
6. the power regulating eqiupment control circuit that is used for heating furnace according to claim 5 is characterized in that: described analog input unit connects 5 tunnel analog quantity input signals; The analog quantity output unit is exported 2 road analog signalses.
7. the power regulating eqiupment control circuit that is used for heating furnace according to claim 1 and 2 is characterized in that: described switching value input block and switching value output unit constitute by the gate circuit buffer circuit.
8. the power regulating eqiupment control circuit that is used for heating furnace according to claim 7 is characterized in that: described switching value input block connects 4 way switch amount input signals; Described switching value output unit is exported 4 way switch amount signals.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202522180U CN201583821U (en) | 2009-12-29 | 2009-12-29 | Power regulator control circuit for heating furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202522180U CN201583821U (en) | 2009-12-29 | 2009-12-29 | Power regulator control circuit for heating furnace |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201583821U true CN201583821U (en) | 2010-09-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009202522180U Expired - Lifetime CN201583821U (en) | 2009-12-29 | 2009-12-29 | Power regulator control circuit for heating furnace |
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| Country | Link |
|---|---|
| CN (1) | CN201583821U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103197624A (en) * | 2013-03-05 | 2013-07-10 | 天津城市建设学院 | Central heating system controller based on digital signal processor (DSP) |
-
2009
- 2009-12-29 CN CN2009202522180U patent/CN201583821U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103197624A (en) * | 2013-03-05 | 2013-07-10 | 天津城市建设学院 | Central heating system controller based on digital signal processor (DSP) |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20100915 |
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| CX01 | Expiry of patent term |