CN1086370A - Double push-pull multifurnace type electromagnetic heating device - Google Patents
Double push-pull multifurnace type electromagnetic heating device Download PDFInfo
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- CN1086370A CN1086370A CN 92112790 CN92112790A CN1086370A CN 1086370 A CN1086370 A CN 1086370A CN 92112790 CN92112790 CN 92112790 CN 92112790 A CN92112790 A CN 92112790A CN 1086370 A CN1086370 A CN 1086370A
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- induction coil
- electromagnetic heating
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Abstract
A kind of double push-pull multifurnace type electromagnetic heating device, lie in and be provided with a micro processor controls one logical drive amplifying circuit in a kind of electromagnetic heating system, drive at least one power component (power transistor) alternate conduction in order to the output high-frequency pulse signal, one end of this power component is according to series connection two electromagnetism sensing coils, the common end that this two induction coil is connected is connected in the common contact of a relay, the normally closed contact of this relay and normal opened contact system are connected to its end of two induction coils, that is this relay can be selected the short circuit in parallel of one of two induction coils, and make another induction coil energising action, make a logical drive amplifying circuit can drive two induction coils.
Description
The present invention relates to a kind of electromagnetic heater, more especially refer to a kind of double push-pull multifurnace type heater.
Known to prior art, known electromagnetic heater generally is all SEPP single ended push-pull formula exchange drive circuit, that is utilize a transistor power component (ON/OFF) to change with high-frequency start switching (Switching) circuit work " leading to "/" breaking ", make a solenoid produce alternation magnetic field boundary, in order to respond to magnetic conductivity pot body heating.Because this power transistor must bear high-pressure spray and meet the demand of high frequency operating characteristics, so element cost height, the supply of power component is more restricted; Moreover the maximum power output of known SEPP single ended push-pull formula electromagnetic heater can't significantly improve, and mostly is 1200 watts of power outputs about (1.2 kilowatts) at present, so be only applicable to small-power heating purposes.
In addition, commonly use electromagnetic heater system and control an electromagnetic induction heating coil with one group of exchange drive circuit, and the kitchen cooking needs a plurality of electrothermal furnaces usually, therefore known heater system is embedded at many electromagnetic ovens on the stove seat and forms, but the electromagnetic heater cost of these many stoves is improved, and then influence the universalness of electromagnetic heater.
A main purpose of the present invention provides a kind of double push-pull multifurnace type electromagnetic heating device, is the double push-pull circuit design, to improve the power output size of electromagnetic heater.
Another main purpose of the present invention provides a kind of electromagnetic heater, controls a plurality of electromagnetic induction heating coils with an exchange drive circuit, saves the circuit manufacturing cost.
In order to achieve the above object, double push-pull multifurnace type electromagnetic heating device of the present invention comprises a microprocessor, the output control signal is controlled a double-push-pull type logical drive amplifying circuit, make two power component alternate conduction ON/OFF, this two power component is connected in series mutually, its common ends two electromagnetic induction coils of connecting, the common ends of this two electromagnetic induction coil connects the common contact (Common) of a relay, normal opened contact of this relay (Normal open) and normally closed contact (Normal close) then connect the other end of this two electromagnetic induction coil more respectively, then utilize this relay to use the short circuit of one of two induction coils, and can use another induction coil energising effect; In other words, control the action of two electromagnetic induction coils according to the present invention system with one group of double push-pull exchange drive circuit, and be can Selective Control two electromagnetic induction coils with a relay.
About detailed construction of the present invention, function and characteristics, can get fully by the detailed description of following examples conjunction with figs. and understand.Wherein:
Fig. 1 is the potential circuit figure of double-push-pull type electromagnetic heater of the present invention.
Fig. 2 is the oscillogram of many stoves of circuit change action of the present invention.
As shown in Figure 1, 2, double push-pull multifurnace type electromagnetic heating device of the present invention comprises a microprocessor (Microprocessor) (10), through its output line of planning control (11) output control signal Va, drive amplifying circuit (21), (22) by two output lines output high-frequency pulse signal V1, V2 through a logic oscillating circuit (20) and two, this two pulse signal V1, V2 are in order to drive this two power component Q1, Q2 alternate conduction (ON/OFF); In other words, this two power component Q1, Q2 system takes turns conducting and does not have the situation of all leading to (ON) simultaneously.This two power component Q1, Q2 be parallel diode D1, D2 respectively, capacitor C 1, C2, C3 and rectifier power source BR two ends; Be connected in series two electromagnetic induction coil LA, LB between this two capacitor C1, C2, common point (Common) P2 and two power component Q1, the Q2 common point P1; The common point P3 of this two induction coil LA, LB is connected in the common point P4 of a relay R y; The normally closed contact P5 of this relay R y is connected in the other end of induction coil LB, that is is connected to the common point P2 of capacitor C 1, C2; The normal opened contact P6 of this relay R y then connects the other end of induction coil LA, that is is connected to the common point P1 of power component Q1, Q2; This relay R y is controlled by the signal VR of microprocessor (10), to select P5 or the conducting of P6 contact.
Be the drive circuit main member of double push-pull multifurnace type electromagnetic heating device of the present invention as mentioned above, its action situation is described as follows:
This two power component Q1, Q2 be subjected to logic oscillating circuit (20) and drive amplifying circuit (21), the high frequency alternate conduction is controlled, done in (22); And according to the present invention, can select LA action of sense coil or LB action by this relay R y, below just four kinds of possible electric current situations explanations of the present invention:
1. working as VR is electronegative potential, and relay R y is failure to actuate, and common point P4 and normally closed contact P5 connect:
(a) at first Q1 conducting, Q2 is by (OFF), and through Q1, coil LA, contact P4, P5, P2 and capacitor C 2 are by coil LA energy storage by Vcc for electric current; Then power component Q1 ends, and 1 charging releases energy coil LA to capacitor C through Vcc through diode D2.
(b) then Q2 conducting, Q1 OFF, electric current I 2 is died coil LA by another counter current energy storage by capacitor C 1 discharge through contact P5, P4 flowing through coil LA and power component Q2; Then Q2 ends, and this coil LA releases energy through capacitor C 2 and diode D1.
Wherein the flow through direction of induction coil LA of electric current I 1 and I2 is opposite, so this induction coil LA produces alternation magnetic field boundary.
2. move common point P4 and normal cut-in point P6 conducting as if relay R y:
(a) at first Q1 conducting, Q2 OFF, electric current I 1 is by the Vcc Q1 that flows through, contact P6, P4, induction coil LB, contact (P2), capacitor C 2 are to induction coil LB energy storage; Then this Q1 ends, and coil LB is through contact P4, P6, diode D2, and 1 charging releases energy to capacitor C.
(b) then Q2 conducting, Q1 OFF, electric current I 2 be by capacitor C 1 discharge through contact P2, coil LB, contact P4, P6, P1 flow to power component Q2, with other direction to inductance L B energy storage; Then this Q2 ends, and this coil LB releases energy through capacitor C 2 and diode D1.
Wherein the flow through direction of induction coil LB of electric current I 1 and I2 is opposite, so induction coil LB produces alternation magnetic field boundary.
As shown in Figure 2, (T1 rises) relay R y was failure to actuate when this VR was electronegative potential Lo, so P4, P5 connects and makes coil LA action, only, during the Va change action for avoiding contact to produce spark, Va becomes electronegative potential, make the Vcc failure of oscillations, microprocessor (10) is to postpone about 20ms to make control signal Va become high potential (T2) again, even also logic oscillating circuit (20) starting oscillation action, VR is a high potential during to T3, relay R y action, contact P4, P6 connects, and makes coil LB action, and control signal Va makes control signal Va become high potential when becoming electronegative potential through 20ms to T4 again, to guarantee relay R y contact stable state; In like manner, the action of T5, T6 is also identical.Wherein, T2 to T3 is coil LA operate time, and T4 to T5 is coil LB operate time, can suitably distribute its time ratio by microprocessor, and reach two stoves power setting out of the ordinary.
According to above-mentioned explanation as can be known, this two power transistor Q1, Q2 alternate conduction then change flow through the induction coil LA or the LB sense of current, and then produce double push-pull alternation magnetic field boundary, because the terminal voltage of this two power transistor is lower, the withstand voltage demand of power transistor of therefore commonly using SEPP single ended push-pull reduces.Moreover, utilize the control of this relay R y, then can select the action of one of two induction coils, also can utilize micro processor controls, divide and advance to switch this relay R y action, then can make little two induction coil LA, LB interactive action, then can make this two coil LA, LB carry out induction heating simultaneously, as the twin furnace purposes.In addition, this two induction coil must be made and not wait big or small line footpath and winding turns, and the induction coil of different capacity output then can be provided.
Illustrate that by the foregoing description the present invention is with a microprocessor and a logical drive amplifying circuit, and to a little power transistor, cooperate a relay R y, then may command two induction coils heating, by that analogy, if adopt two relay R y, then four induction coils of may command heat, and reach with low this and make the electromagnetic heater of many stoves.
Certainly, the foregoing description and accompanying drawing system are in order to explanation the present invention, and non-in order to restriction the present invention, the present invention is limited by following claim.
Claims (5)
1, a kind of double push-pull multifurnace type electromagnetic heating device, comprise a logical drive amplifying circuit, drive at least one power component (power transistor) alternate conduction in order to the output high-frequency pulse signal, it is characterized in that: an end of this power component at least two electromagnetic induction coils of connecting in regular turn, the common end that this two induction coil is connected is connected in the common contact of a relay, the normally closed contact system of this relay is connected in wherein its end of an induction coil (non-common end), and its normal opened contact system is connected in its end (non-common end) of another induction coil, that is this relay can select the short circuit in parallel of one of two induction coils, and makes another induction coil energising action.
2, double push-pull multifurnace type electromagnetic heating device according to claim 1, it is characterized in that, this power component comprises two power transistors serial connection, and the common point of two power transistors is connected in series induction coil in regular turn, this two power transistor promotes mutual conducting by logic drive circuit, produces the double push-pull driving power.
3, double push-pull multifurnace type electromagnetic heating device according to claim 1 is characterized in that, the winding turns of this two induction coil and line directly are inequality.
4, double push-pull multifurnace type electromagnetic heating device according to claim 1 is characterized in that, this logical drive amplifying circuit is controlled its oscillation action or the failure of oscillations by a control signal of a microprocessor.
5, double push-pull multifurnace type electromagnetic heating device according to claim 4 is characterized in that, this micro processor controls signal is delayed a scheduled time than the change action time of relay.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92112790 CN1086370A (en) | 1992-10-30 | 1992-10-30 | Double push-pull multifurnace type electromagnetic heating device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92112790 CN1086370A (en) | 1992-10-30 | 1992-10-30 | Double push-pull multifurnace type electromagnetic heating device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1086370A true CN1086370A (en) | 1994-05-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 92112790 Pending CN1086370A (en) | 1992-10-30 | 1992-10-30 | Double push-pull multifurnace type electromagnetic heating device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1086370A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100375864C (en) * | 1997-11-25 | 2008-03-19 | 松下电器产业株式会社 | Electric cooker |
| CN102384578A (en) * | 2011-10-04 | 2012-03-21 | 王玉 | Full-automatic electromagnetic water heater |
| CN104185328A (en) * | 2013-05-24 | 2014-12-03 | 松下电器产业株式会社 | Induction heating device |
-
1992
- 1992-10-30 CN CN 92112790 patent/CN1086370A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100375864C (en) * | 1997-11-25 | 2008-03-19 | 松下电器产业株式会社 | Electric cooker |
| CN102384578A (en) * | 2011-10-04 | 2012-03-21 | 王玉 | Full-automatic electromagnetic water heater |
| CN104185328A (en) * | 2013-05-24 | 2014-12-03 | 松下电器产业株式会社 | Induction heating device |
| CN104185328B (en) * | 2013-05-24 | 2018-06-08 | 松下电器产业株式会社 | Induction heating apparatus |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C01 | Deemed withdrawal of patent application (patent law 1993) | ||
| WD01 | Invention patent application deemed withdrawn after publication |