CN100522832C - Control circuit of magnetized liquid device - Google Patents
Control circuit of magnetized liquid device Download PDFInfo
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- CN100522832C CN100522832C CNB2005101105162A CN200510110516A CN100522832C CN 100522832 C CN100522832 C CN 100522832C CN B2005101105162 A CNB2005101105162 A CN B2005101105162A CN 200510110516 A CN200510110516 A CN 200510110516A CN 100522832 C CN100522832 C CN 100522832C
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Abstract
The invention is about a pilot circuit of liquid magnetizing device which includes rectifying and filter circuit, switch circuit, energizing circuit and energy-conducting circuit. The switch circuit contains at least one power transistor, every power transistor works in on and off state, during the period when the power transistor is broken-over; the pulse power source is exerted to the magnet exciting coil. The characteristic of the circuit: when the power transistor changes from break-over to cut-off, the energy stored in the magnetic field goes back to the filtering capacitance, when the power transistor is broken-over again, the electric charges is utilized again to become the magnetic energy in the coil so the invention has quite little energy expenditure. The advantages of the invention: the pulse magnetic field in the invention can improve the magnetizing efficiency and decrease the energy expenditure; the control circuit in the invention can decrease the consumed power in pilot circuit, extend the service life of the pilot circuit as well as decrease the cost.
Description
Technical field
The invention relates to pilot circuit, especially for the pilot circuit of magnetized liquid device.
Background technology
Liquid through magnetizing, because its molecular grouping is less, characteristics such as seepage force, solvency power, oxygen level, electroconductibility are all than the liquid height before the magnetization, so be widely used in various different field, with the magnetized water is example, the advantages such as output that it has the dissolving incrustation scale, promotes agricultural-food.
Traditional magnetized device of liquid that makes adopts permanent magnet, direct current standing field, power frequency alternating magnetic field or produces alternating magnetic field with the mode of quasi-resonance to make the liquid magnetization usually.
Yet, use permanent magnet, direct current standing field, and the magnetizing assembly of power frequency alternating magnetic field, its volume is bigger, and the magneticstrength of permanent magnet is immutable, though it is immutable to change its operating frequency for direct current standing field and its magneticstrength of power frequency alternating magnetic field.In view of these defectives, occurred producing alternating magnetic field and made the magnetized device of liquid with the quasi-resonance mode.But the magnetic field that this mode produced is that its magnetization efficient of the magnetic field that promptly produces positive and negative both direction in one-period of alternation is lower, and, adopting its diversion member of device of this mode must be the ferromegnetism material, and (otherwise it is too high and damage this power tube to cause being added in the pilot circuit reverse voltage on the power output tube.) power output transistor in its pilot circuit must select high back-pressure for use.(this will make the cost of pilot circuit higher) will induce powerful eddy current on the diversion member when the circuit works better, this will consume a large amount of electric energy and produce suitable heat the liquid in the diversion member of flowing through will be heated, the fluid temperature that is magnetized is risen, and this is that we are undesirable.Consider cost and efficient, how can be under the prerequisite that does not influence the magnetization effect, the power that reduces this pilot circuit as far as possible and consumed, particularly consume energy on guiding subassembly (that is, the load of this pilot circuit), become an important topic of the pilot circuit of magnetized liquid device.In addition, known pilot circuit assembly damages easily, particularly when the magnetization frequency is high, easily cause the too high voltages problem along with the variation of the material of selected guiding subassembly, can shorten the life-span of magnetized liquid device, and often must the higher transistor of withstand voltage, the also required cost of remote effect magnetized liquid.
Therefore, need a kind of pilot circuit that can address the above problem.
Summary of the invention
An object of the present invention is to provide a kind of pilot circuit of magnetized liquid device, wherein the power transistor in the power output circuit can add to inductive load by the direct supply after with rectification in conduction period, to produce pulsed magnetic field, be about to electric field energy and convert magnetic field energy to, and be stored in the inductive load; And, the magnetic field energy in the inductive load can be converted to electric field energy and return to current rectifying and wave filtering circuit between the off period at power transistor.Therefore, it is minimum to treat that in order to guiding magnetized liquid passes the energy that is consumed on the guiding subassembly of pulsed magnetic field in the device, even when the material of guiding subassembly is nonmagnetic substance, the circuit energy that it consumed can be ignored, so can under the situation that does not influence magnetic field energy intensity, effectively reduce the power that pilot circuit consumes.
Another object of the present invention provides a kind of pilot circuit of magnetized liquid device, even it is under the situation that the material of guiding subassembly changes, still can low voltage operating, promptly, the voltage that puts on power output circuit changes hardly thereupon, so the (PCC) power in the circuit can not damage because the guiding subassembly material changes the too high voltages that causes, so can select for use the lower power transistor of withstand voltage to reduce cost.
Another purpose of the present invention provides a kind of pilot circuit of magnetized liquid device, it is by the direct or indirect driving power output circuit of actuate signal, and the frequency of actuate signal, dutycycle (Duty Cycle) etc. all can be according to suitably adjusting for the different demands of magnetized liquid.
A further object of the present invention provides a kind of pilot circuit of magnetized liquid device, and the magnetic field that it produced is a pulsed magnetic field, does not all change in the direction of whole on period magneticstrength, and just its size is made periodic change.This has just been avoided the negative function of reversed magnetic field to previous magnetic field magnetisation effect, thereby has improved magnetization efficient.The pilot circuit of magnetized liquid device provided by the invention comprises: rectification and filtering circuit are converted to direct supply with the AC power of importing; Switch circuit, this direct supply is converted to the pulse power, and be applied on the inductive load, to produce pulsed magnetic field liquid is magnetized, this switch circuit comprises: power output circuit, comprise at least one power transistor, and each power transistor is operated on off state, in each power transistor conduction period, the pulse power is applied on the inductive load; Driving circuit is in order to control the transistorized conducting in the power output circuit and to end; And order wire circuit,, between the off period magnetic field energy in the inductive load is returned in the filtering circuit with the electric energy form at each power transistor.
Description of drawings
Accompanying drawing 1 produces the double tube positive exciting formula power switch circuit skeleton diagram of driving pulse for the present invention adopts the CPLD chip.
Accompanying drawing 2 produces the double tube positive exciting formula power switch circuit skeleton diagram of actuate signal voluntarily for driving circuit of the present invention.
Accompanying drawing 3 produces the double tube positive exciting formula power switch circuit skeleton diagram of actuate signal voluntarily for the another kind of driving circuit of the present invention.
Accompanying drawing 4 is skeleton diagrams that the present invention adopts the output of single tube positive activation type power switch.
Accompanying drawing 5 is basic circuit diagrams of accompanying drawing 1.
Accompanying drawing 6 is basic circuit diagrams of accompanying drawing 2.
Accompanying drawing 7 is basic circuit diagrams of accompanying drawing 3.
Accompanying drawing 8 is basic circuit diagrams of accompanying drawing 4.
Label declaration in the accompanying drawing;
10～energy conduction circuit
11～overcurrent/excess voltage protection
12～EMC filtering circuit
13～current rectifying and wave filtering circuit/110V/220V change-over switch
14～switching power circuit
15～pair transistor positive activation type power output circuit
16～power transistor A driving circuit (producing actuate signal) with the CPLD chip
17～power transistor B driving circuit (producing actuate signal) with the CPLD chip
18～pulse signal generating circuit
26～power transistor A driving circuit (producing actuate signal and directly driving) with the switch power supply special chip
27～power transistor B driving circuit
28～output power adjusting circuit
29～output frequency regulating circuit
35～pair transistor positive activation type power output circuit
36～power transistor A driving circuit (time spent base circuit chip produces actuate signal and directly drives)
37～power transistor B driving circuit
38～output power adjusting circuit
39～output frequency regulating circuit
40～energy conduction circuit
45～single-transistor positive activation type power output circuit
46～power transistor drive circuit (time spent base circuit chip produces actuate signal and directly drives)
48～output power adjusting circuit
49～output frequency regulating circuit
Embodiment
Now see also Fig. 1 and 5, it shows respectively according to functional diagram and the basic circuit diagram of employing CPLD (PLD) chip of the present invention with an embodiment of the pilot circuit of driving pair transistor positive activation type invertor.
Among Fig. 1; the AC power of 110V or 220V inputs to overcurrent/excess voltage protection 11; via electromagnetic compatibility (EMC) filtering circuit 12; put on rectification and filtering circuit 13 again; the AC power of input is converted to direct supply; this rectification and filtering circuit 13 comprise the 110V/220V change-over switch in addition, make that the AC power of input is changeable to be 220V or 110V.
Fig. 5 shows that overcurrent/excess voltage protection 11 can be made up of fuse (fuse) and voltage sensitive element (ZMR); EMC filtering circuit 12 can be made up of electrical condenser C1 and C2 and reactance coil (choke) L1; rectification and filtering circuit 13 can be by bridge rectifier (BD); negative temperature coefficient (NTC) thermistor; electrical condenser C3 and C4 and resistor R 1 and R2 form; the 110V/220V change-over switch is made of SW3; when input voltage switches to 220V; rectification and filtering circuit 13 are full-wave rectification; when input voltage switched to 110V, rectification and filtering circuit 13 were voltage multiplying rectifier.
Among Fig. 1, pair transistor positive activation type power output circuit 15, power transistor A driving circuit 16, power transistor B driving circuit 17 and pulse signal generating circuit 18 are as the positive activation type invertor (forward inverter) of switch circuit, the direct supply of rectification and filtering circuit 13 outputs is converted to the pulse power, and the inductive load that is applied to magnet coil for example is to produce pulsed magnetic field, in order to magnetized liquid.
Pulse signal generating circuit 18 mainly utilizes CPLD (PLD) chip to produce pulse signal, be sent to power transistor A driving circuit 16 and power transistor B driving circuit 17 respectively, produce respectively again between actuate signal switches between conduction period and off period with each transistor that drives pair transistor positive activation type power output circuit 15 simultaneously.In conduction period, the direct supply after the rectification is applied to magnet coil, to produce pulsed magnetic field, soon electric field energy converts magnetic field energy to and is stored in the magnet coil; Between the off period, the inductive emf that produces in the magnet coil then converts magnetic field energy to electric field energy, returns to rectification and filtering circuit 13 via energy conduction circuit 10.
As shown in Figure 5, pair transistor positive activation type power output circuit 15, mainly pair transistor Q1 and the Q2 by field-effect transistor (MOSFET) (or igbt (IGBT) etc. similarly) constitutes, it is under the situation that the material of guiding subassembly changes, still can low voltage operating, promptly, the voltage that puts on power output transistor changes hardly thereupon, so power transistor can not damage because the guiding subassembly material changes the too high voltages that causes, so can select for use the lower power transistor of withstand voltage to reduce cost.
Power transistor A driving circuit 16 mainly is made up of the bipolar transistor Q4 to Q7 of separation assembly (discretecomponent), transistor Q2 in order to driving power output circuit 15, power transistor B driving circuit 17 mainly is made up of the integrated circuit (IC) 2 of optically coupled integrated circuit TLP251 (or fellows such as HP3120, HCNW3120), thereby be able to and power transistor A driving circuit 16 forms electrical isolation, and in order to the transistor Q1 of driving power output circuit 15.
Pulse signal generating circuit 18 mainly is made up of CPLD (PLD) chip.This pulse signal is pulse-width modulation (Pulse Width Modulation, PWM) signal (or similarly), its frequency and dutycycle (Duty Cycle) all can be regulated according to the magnetization required energy of particular fluid, regulate dutycycle and promptly regulate output rating.Generally speaking, the variation range of its dutycycle is 10-50%, and its signal is a square wave.
The pilot circuit of Fig. 1 comprises a switch power supply (switching power) circuit 14 in addition, transfers driving circuit 16,17 and the required low-voltage dc power supply of whole low voltage control system in order to the direct supply with rectification and filtering circuit 13 outputs.
As shown in Figure 5, switch power supply (switching power) circuit 14 mainly comprises integrated circuit (IC) 3 and the relevant feedback loop that is made of for example electrical condenser C12, resistor R 12, diode D7 or the like assembly thereof that resistor R 6, electrical condenser C6, transformer T1, diode D4 and D5, electrical condenser C5 and C7, inducer L2 and switch power supply are adjusted unicircuit VIPER 12A.This switch power supply (switchingpower) circuit 14 consumed power under the magnetized liquid device holding state is less, to save the energy and to avoid the pilot circuit temperature rise too high.
Now see also Fig. 2 and accompanying drawing 6, it shows that respectively the present invention adopts functional diagram and the thin portion schematic circuit thereof of switch power supply special chip with an embodiment of the pilot circuit of driving pair transistor positive activation type invertor.
As shown in Figure 2, itself and circuit difference shown in Figure 1 are, power transistor A driving circuit 26 produces actuate signal voluntarily, transistor with control power output circuit 15, power transistor B driving circuit 27 then receives this actuate signal, control another transistor of power output circuit 15 again, other is provided with output power adjusting circuit 28 and output frequency regulating circuit 29, in order to the duty of regulating driving circuit 26 actuate signal that produces frequency when, regulate the output rating and the output frequency of power output circuit 15 thus respectively respectively.
As shown in Figure 6, power transistor A driving circuit 26 mainly (or similarly form by switch power supply special chip UC3844 by) integrated circuit (IC) 1, in order to driving transistors Q2, power transistor B driving circuit 27 is mainly by optically coupled integrated circuit TLP251 (or HP3120, fellows such as HCNW3120) integrated circuit (IC) 2 is formed, thereby be able to form electrical isolation with power transistor A driving circuit 26, and accept the actuate signal that driving circuit 26 produces, again in order to driving transistors Q1, this time difference of two pulse signals that is sent to Q1 and Q2 respectively is very little, so Q1 and Q2 can switch in fact synchronously.Output power adjusting circuit 28 mainly is made of variohm VR2, and output frequency regulating circuit 29 mainly is made of variohm VR1, and magnet coil mainly is made of inducer L3.
The actuate signal that power transistor A driving circuit 26 produces is pulse-width modulation (Pulse Width Modulation, PWM) signal (or similarly), its frequency and dutycycle (Duty Cycle) all can be according to magnetization particular fluid required energy, by output power adjusting circuit 28 and output frequency regulating circuit 29 regulating and controlling in addition respectively.Generally speaking, the variation range of its dutycycle is 10-50%, and its signal is a square wave.
Now see also Fig. 3 and Fig. 7, it shows that respectively the present invention adopts functional diagram and the thin portion schematic circuit thereof of time-base circuit chip with an embodiment of the pilot circuit of driving pair transistor positive activation type invertor.
As shown in Figure 3, itself and the main difference of circuit shown in Figure 2 are that power transistor A driving circuit 36 utilizes the time-base circuit chip but not utilize the switch power supply special chip to produce actuate signal voluntarily as power transistor drive circuit 26.
As shown in Figure 7, power transistor A driving circuit 36 mainly (or similarly form by unicircuit time-base circuit chip NE555 by) integrated circuit (IC) 1, output power adjusting circuit 38 mainly is made of variohm VR2, output frequency regulating circuit 39 mainly is made of variohm VR1, and magnet coil mainly is made of inducer L3.
The actuate signal that power transistor A driving circuit 36 produces is pulse-width modulation (Pulse Width Modulation, PWM) signal (or similarly), its frequency and dutycycle (Duty Cycle) all can be according to magnetization particular fluid required energy, by output power adjusting circuit 38 and output frequency regulating circuit 39 regulating and controlling in addition respectively.Generally speaking, the variation range of its dutycycle is 10-50%, and its signal is a square wave.
Now see also Fig. 4 and Fig. 8, it shows that respectively the present invention adopts functional diagram and the thin portion schematic circuit thereof of time-base circuit chip with an embodiment of the pilot circuit of driving single-transistor positive activation type invertor.
As shown in Figure 4, itself and the main difference of circuit shown in Figure 3 are, the power output circuit 45 of Fig. 4 is the single crystal tubular type, drive by power transistor drive circuit 46, and the power output circuit 35 of Fig. 3 is double-transistor, is driven respectively by power transistor A driving circuit 36 and power transistor B driving circuit 37.
Fig. 8 shows that power transistor drive circuit 46 mainly is made up of integrated circuit (IC) 1 and the IC2 of two time-base circuit chip NE555 (or a fellow such as time-base circuit chip NE556).It produces actuate signal voluntarily, with the transistor Q4 of control power output circuit 45.Output power adjusting circuit 48 mainly is made of variohm VR2, and output frequency regulating circuit 49 mainly is made of variohm VR1.
Energy conduction circuit 40 mainly is made up of diode D1, and magnet coil mainly is made of inducer L3 and L4.When the transistor Q4 of power output circuit 45 was in conduction period, the flow through winding of L3 of direct supply, the sense of current from top to bottom, increase gradually became the moment that ends until transistor Q4 by conducting, and electric current reaches maximum value.During this period, convert electric field energy to magnetic field energy, be stored in the magnet coil, magneticstrength is along with the increase of the electric current by coil strengthens.When the transistor Q4 of power output circuit 45 is between the off period, because inductive emf is reverse, the diode D1 conducting of energy conduction circuit 40 at this moment, electric current is back to filtering circuit via L4, the sense of current from bottom to top, by just by the time maximum value reduce gradually, the field direction that produce on the magnet coil this moment is with identical before, but intensity along with the electric current by coil reduce reduce.In other words, the reverse induction electromotive force that produces in the magnet coil via electrical condenser C3 and the C4 charging of D1 to rectification and filtering circuit 13, therefore stores electric field energy with voltage system.Hence one can see that, in the conducting of the transistor Q4 of power output circuit 45 and between the off period, all produces magnetic field on the magnet coil, and its direction is constant, but intensity is then with changing by the size of current on it.
The actuate signal that power transistor drive circuit 46 produces is pulse-width modulation (Pulse Width Modulation, PWM) signal (or fellow), its frequency and dutycycle (Duty Cycle) all can be according to magnetization particular fluid required energy, and by output power adjusting circuit 48 and output frequency regulating circuit 49 regulating and controlling in addition respectively.Generally speaking, the variation range of its dutycycle is 10-50%, and its signal is a square wave.
Pilot circuit for single-transistor positive activation type invertor, except that can adopting time-base circuit chip drives single-transistor positive activation type invertor, adopt CPLD (PLD) chip or switch power supply special chip to drive as described above as the pair transistor positive activation type invertor.For example, if the double-transistor power output circuit 15 among Fig. 1 is replaced with single crystal tubular type power output circuit, two driving circuits 16 and 17 replace with single driving circuit, make the pulse signal generating circuit 18 that utilizes the CPLD chip to produce pulse signal that pulse signal is sent to this single power transistor driving circuit, produce again between actuate signal switches between conduction period and off period with the transistor that drives this single-transistor positive activation type power output circuit, can obtain the embodiment of employing CPLD chip of the present invention with the pilot circuit that drives single-transistor positive activation type invertor.Again for example, if the double-transistor power output circuit 15 among Fig. 2 is replaced with single crystal tubular type power output circuit, power transistor drive circuit 26 produces actuate signal voluntarily, to control the transistor of this single crystal tubular type power output circuit, can obtain the present invention and adopt the embodiment of switch power supply special chip with the pilot circuit of driving single-transistor positive activation type invertor.
The present invention just embodiment elaborates, yet the foregoing description only is exemplary illustration principle of the present invention and effect, is not to be used to limit the present invention.Be familiar with this skill personage Ying Zhi, under not departing from spirit of the present invention and category, various corrections, change all can be carried out.
Claims (14)
1. the pilot circuit of a magnetized liquid device, it is characterized in that: rectification and filtering circuit convert input ac power to direct supply; Switch circuit is converted to the pulse power with this direct supply, and be applied on the inductive load, to produce pulsed magnetic field liquid is magnetized, this switch circuit comprises: power output circuit, comprise at least one power transistor, each power transistor works on off state, in each power transistor conduction period, the pulse power is applied on the inductive load; And driving circuit in order to control power transistor conducting with end; And order wire circuit, is returned to the magnetic field energy in the inductive load in the filtering circuit with the electric energy form between the off period at each power transistor.
2. press the pilot circuit of the described magnetized liquid device of claim 1, it is characterized in that: the switch power output circuit constitutes double tube positive exciting formula power output circuit by two power transistors, magnet coil is serially connected between two power transistors, and two power transistor open and close are switched in driving circuit control synchronously.
3. press the pilot circuit of the described magnetized liquid device of claim 1, it is characterized in that: the switch power output circuit also can constitute single tube positive activation type power output circuit by a power transistor, and magnet coil then is serially connected between power transistor and the input DC power.
4. press the pilot circuit of the described magnetized liquid device of claim 1, it is characterized in that: the energy conduction circuit is at two diodes of the two ends of magnet coil serial connection, the negative pole of a diode is connected with the positive pole of input DC power, and the positive pole of another diode is through current-limiting resistance ground connection.
5. by the pilot circuit of the described magnetized liquid device of claim 1, it is characterized in that: the energy conduction circuit is diode ground connection of serial connection in magnet coil.
6. press the pilot circuit of the described magnetized liquid device of claim 1, it is characterized in that: described driving circuit comprises first and second driving circuits, control two power transistor open and close respectively, and accept the pulse signal of another pulse signal generation circuit respectively.
7. by the pilot circuit of the described magnetized liquid device of claim 3, it is characterized in that: single tube positive activation type power output switching circuit, its driving circuit produces pulse drive signal voluntarily.
8. press the pilot circuit of the described magnetized liquid device of claim 2, it is characterized in that: the driving circuit of two-tube power output circuit, also can produce pulse signal voluntarily by first driving circuit, control a power transistor switch, second driving circuit is accepted the pulse signal that first crystal drive circuit produces, and controls another power transistor switch.
9. press the pilot circuit of claim 7 or 8 described magnetized liquid devices, it is characterized in that: described driving circuit is made of separative element, after one of them driving circuit was isolated by photoelectricity coupling unicircuit and another driving circuit, output pulse signal was controlled another power transistor.
10. by the pilot circuit of the described magnetized liquid device of claim 7, it is characterized in that: base chip and switch power supply special chip when the driving circuit that produces actuate signal voluntarily is provided with.
11. by the pilot circuit of claim 6 or 7 described magnetized liquid devices, it is characterized in that: described actuate signal or pulse signal are the signal of pulse-width modulation; The frequency of this pulse width modulating signal is variable; This pulse width modulating signal dutycycle is variable; The variation range of the dutycycle of this pulse width modulating signal is 10-50%.
12. by the pilot circuit of claim 1 or 2 or 3 described magnetized liquid devices, it is characterized in that: described power transistor is field-effect transistor or igbt.
13. the pilot circuit of magnetized liquid device as claimed in claim 1 is characterized in that: also comprise overcurrent/voltage protection circuit, be arranged between the AC power and rectification and filtering circuit of input.
14. the pilot circuit of magnetized liquid device as claimed in claim 1 is characterized in that: also comprise the electromagnetic compatibility filtering circuit, be arranged between the AC power and rectification and filtering circuit of input.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005101105162A CN100522832C (en) | 2005-11-18 | 2005-11-18 | Control circuit of magnetized liquid device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005101105162A CN100522832C (en) | 2005-11-18 | 2005-11-18 | Control circuit of magnetized liquid device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1966417A CN1966417A (en) | 2007-05-23 |
| CN100522832C true CN100522832C (en) | 2009-08-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2005101105162A Expired - Fee Related CN100522832C (en) | 2005-11-18 | 2005-11-18 | Control circuit of magnetized liquid device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100522832C (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101565221B (en) * | 2009-05-27 | 2012-05-30 | 上海安得利给水设备有限公司 | High-frequency electromagnetic water purification system |
| CN102883493A (en) * | 2011-07-12 | 2013-01-16 | 周世勋 | Energy-saving control module |
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2005
- 2005-11-18 CN CNB2005101105162A patent/CN100522832C/en not_active Expired - Fee Related
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| CN1966417A (en) | 2007-05-23 |
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