CN201290186Y - Switch power circuit and electromagnetic stove using the same - Google Patents
Switch power circuit and electromagnetic stove using the same Download PDFInfo
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- CN201290186Y CN201290186Y CNU2008202128226U CN200820212822U CN201290186Y CN 201290186 Y CN201290186 Y CN 201290186Y CN U2008202128226 U CNU2008202128226 U CN U2008202128226U CN 200820212822 U CN200820212822 U CN 200820212822U CN 201290186 Y CN201290186 Y CN 201290186Y
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Abstract
The utility model relates to a switch power supply circuit and an electromagnetic oven using the switch power circuit. The switch power circuit comprises a rectification and filter module and a voltage control module, wherein the voltage control module comprises triodes Q5 and Q6, a transformer T1, a diode D9, a zener diode ZD1 and a capacitor C15. The collector of the triode Q5 is connected to the primary side terminal 4 of the transformer T1, the primary side terminal 1 of the transformer T1 is connected to the output voltage terminal A of the rectification and filter module, the emitter if the triode Q5 grounds, the collector of the triode Q6 is connected with the base of the triode Q5, the emitter of the triode Q6 grounds, the base is connected with the positive pole of the zener diode ZD1, and the negative pole of the zener diode ZD1 is connected with the cathode of the diode D9. The switch power circuit of the utility model has advantages of low cost and simple circuit.
Description
Technical field
The utility model relates to appliance field, more particularly, relates to the electromagnetic oven of a kind of switching power circuit and this switching power circuit of use.
Background technology
The switching power circuit that electromagnetic oven is commonly used utilizes Switching Power Supply control chip VIPer12A or FSD200 to realize.The technical scheme of employing Switching Power Supply control chip VIPer12A as shown in Figure 1, alternating current is after the rectification of rectifier bridge heap, through D8, R35, obtain a 310V left and right sides direct voltage (when interchange is input as the 220V power supply) behind the C15 rectifying and wave-filtering, this direct voltage is connected to the 7th pin of transformer T3, the 8th pin of T3 is connected to the DRAIN pin of VIPer12A, the 1st pin of the output winding of transformer T3 passes through D9, R49, ZD1, C25, R48, C23 is connected to the feedback pin FB of chip, the FB heel makes output voltage keep stable according to the switch of the inner MOSFET of big or small control chip of feedback current.Its chip internal block diagram as shown in Figure 3.
The technical scheme of employing Switching Power Supply control chip FSD200 as shown in Figure 2.Alternating current is after the rectification of rectifier bridge heap, through D8, R30, obtain a 310V left and right sides direct voltage (when interchange is input as the 220V power supply) behind the C12 rectifying and wave-filtering, this direct voltage is connected to the 1st pin of transformer T1, and the 2nd pin of T1 is connected to the DRAIN pin of chip, and this direct voltage also is directly connected to the Vstr pin of chip, Vstr pin voltage is by the direct voltage of the high pressure regulator HV/REG generation 7V of chip internal, and this voltage is as the control voltage of chip internal.The 3rd pin of the output winding of transformer T1 is connected to the feedback pin Vfb of chip by D12, ZD1, R49, R52, Q5, R51, C28, the 0.6V/0.5V hysteresis comparator of the feedback voltage of Vfb pin and chip internal relatively, by the gate-drive of the MOSFET of comparative result control chip inside, make output voltage keep stable.Its chip internal block diagram as shown in Figure 4.
Adopt above-mentioned two kinds of technical schemes, need to adopt special Switching Power Supply control chip and rectification drive circuit, thereby the entire circuit complexity, and cost is higher.
Therefore, need a kind of cost lower, the simple switching power circuit of circuit.
The utility model content
The technical problems to be solved in the utility model is that at the switching power circuit complexity of prior art, the defective that cost is higher provides a kind of circuit simple, lower-cost switching power circuit.
The technical scheme that its technical problem that solves the utility model adopts is: construct a kind of switching power circuit, comprise rectification filtering module and voltage control module, wherein, described voltage control module comprises: triode Q5, Q6, transformer T1, diode D9, voltage stabilizing didoe ZD1 and capacitor C 15, the base stage of wherein said triode Q5 is connected to the output voltage terminal A of rectification filtering module, the collector electrode of described triode Q5 is connected to former limit 4 ends of described transformer T1, former limit 1 end of described transformer T1 is connected to the output voltage terminal A of described rectification filtering module, the grounded emitter of described triode Q5, the collector electrode of described triode Q6 links to each other with the base stage of described triode Q5, the grounded emitter of described triode Q6, base stage links to each other with the positive pole of voltage stabilizing didoe ZD1, the negative level of described voltage stabilizing didoe ZD1 links to each other with the negative electrode of diode D9 and the positive pole of described capacitor C15, the minus earth of described capacitor C15, the anode of described diode D9 links to each other with secondary 7 ends of described transformer T1, secondary 5 ends of described transformer T1 link to each other with the collector electrode of described triode Q6, described transformer secondary mid point 6 end ground connection.
In the described switching power circuit of utility model, described voltage control module further comprises: resistance R 52, R53, R33, capacitor C 12 and diode D7, wherein, be connected to the base stage of the output voltage terminal A and the described triode Q5 of described rectification filtering module after described resistance R 52, the R53 series connection, be connected to after described resistance R 33 and 12 parallel connections of described capacitor C between former limit 1 end of the negative electrode of described diode D7 and described transformer, the anode of described diode D7 is connected to the former limit of described transformer 4 ends.
In the described switching power circuit of utility model, described voltage control module further comprises: resistance R 47, R48, diode D10 and capacitor C 20, wherein said resistance R 47 1 ends link to each other with the emitter of triode Q5, an end ground connection, the anode of described diode D10 links to each other with the emitter of described triode Q5, negative electrode is through resistance R 48 ground connection, described capacitor C 20 1 ends link to each other with the anode of described diode D10, and the other end links to each other with the negative electrode of described diode D10.
In the described switching power circuit of utility model, described voltage control module further comprises: resistance R 49, R50 and capacitor C 21, described resistance R 49 is connected between the positive pole of 5 ends of described transformer T1 and described voltage stabilizing didoe ZD1, between the collector electrode of described resistance R 50 and 5 ends that are connected to described transformer T1 after capacitor C 21 is connected and described triode Q6.
In the described switching power circuit of utility model, described voltage control module further comprises: capacitor C 23 and resistance R 51, wherein said resistance C23 is in parallel with described diode D9, and described resistance R 51 is connected between the base stage of the anode of described voltage stabilizing didoe ZD1 and described triode Q6.
In the described switching power circuit of utility model, described rectification filtering module comprises rectifier bridge heap T, diode D8, resistance R 30 and capacitor C 11,1 end of described rectifier bridge heap T links to each other with ACN with alternating current input ACL respectively with 3 ends, 4 end ground connection, 3 ends link to each other with the anode of diode D8, the negative electrode of described diode D8 links to each other through the positive pole of resistance R 30 with described capacitor C 11, the negative level ground connection of described capacitor C 11, the just very described output voltage terminal A of described capacitor C 11.
The another technical scheme that its technical problem that solves the utility model adopts is: construct a kind of electromagnetic oven, comprise body of heater, be arranged on described body of heater switch inside power circuit, described switching power circuit comprises rectification filtering module and voltage control module, it is characterized in that, described voltage control module comprises: triode Q5, Q6, transformer T1, diode D9, voltage stabilizing didoe ZD1 and capacitor C 15, the base stage of wherein said triode Q5 is connected to the output voltage terminal A of rectification filtering module, the collector electrode of described triode Q5 is connected to former limit 4 ends of described transformer T1, former limit 1 end of described transformer T1 is connected to the output voltage terminal A of described rectification filtering module, the grounded emitter of described triode Q5, the collector electrode of described triode Q6 links to each other with the base stage of described triode Q5, the grounded emitter of described triode Q6, base stage links to each other with the positive pole of voltage stabilizing didoe ZD1, the negative level of described voltage stabilizing didoe ZD1 links to each other with the negative electrode of diode D9 and the positive pole of described capacitor C15, the minus earth of described capacitor C15, the anode of described diode D9 links to each other with secondary 7 ends of described transformer T1, secondary 5 ends of described transformer T1 link to each other with the collector electrode of described triode Q6, described transformer secondary mid point 6 end ground connection.
In electromagnetic oven described in the utility model, described voltage control module further comprises: resistance R 52, R53, R33, capacitor C 12 and diode D7, wherein, be connected to the base stage of the output voltage terminal A and the described triode Q5 of described rectification filtering module after described resistance R 52, the R53 series connection, be connected to after described resistance R 33 and 12 parallel connections of described capacitor C between former limit 1 end of the negative electrode of described diode D7 and described transformer, the anode of described diode D7 is connected to the former limit of described transformer 4 ends.
In electromagnetic oven described in the utility model, described voltage control module further comprises: resistance R 47, R48, diode D10 and capacitor C 20, wherein said resistance R 47 1 ends link to each other with the emitter of triode Q5, an end ground connection, the anode of described diode D10 links to each other with the emitter of described triode Q5, negative electrode is through resistance R 48 ground connection, described capacitor C 20 1 ends link to each other with the anode of described diode D10, and the other end links to each other with the negative electrode of described diode D10.
In electromagnetic oven described in the utility model, described rectification filtering module comprises rectifier bridge heap T, diode D8, resistance R 30 and capacitor C 11,1 end of described rectifier bridge heap T links to each other with ACN with alternating current input ACL respectively with 3 ends, 4 end ground connection, 3 ends link to each other with the anode of diode D8, the negative electrode of described diode D8 links to each other through the positive pole of resistance R 30 with described capacitor C 11, the negative level ground connection of described capacitor C 11, the just very described output voltage terminal A of described capacitor C 11.
Use switching power circuit described in the utility model and electromagnetic oven, need not to adopt special switching power source chip, circuit design is simple, and cost is lower.
Description of drawings
The utility model is described in further detail below in conjunction with drawings and Examples, in the accompanying drawing:
Fig. 1 is the circuit theory diagrams of switching power source chip of the use VIPer12A chip of prior art;
Fig. 2 is the circuit theory diagrams of switching power source chip of the use PSD200 chip of prior art;
Fig. 3 is the internal structure schematic diagram of the VIPer12A chip of prior art;
Fig. 4 is the internal structure schematic diagram of the PSD200 chip of prior art;
Fig. 5 is the schematic diagram of first embodiment of switching power circuit of the present utility model;
Fig. 6 is the schematic diagram of second embodiment of switching power circuit of the present utility model.
Embodiment
As shown in Figure 5, switching power circuit of the present utility model, comprise rectification filtering module and voltage control module, wherein, described voltage control module comprises: triode Q5, Q6, transformer T1, diode D9, voltage stabilizing didoe ZD1 and capacitor C 15, the base stage of wherein said triode Q5 is connected to the output voltage terminal A of rectification filtering module, the collector electrode of described triode Q5 is connected to former limit 4 ends of described transformer T1, former limit 1 end of described transformer T1 is connected to the output voltage terminal A of described rectification filtering module, the grounded emitter of described triode Q5, the collector electrode of described triode Q6 links to each other with the base stage of described triode Q5, the grounded emitter of described triode Q6, base stage links to each other with the positive pole of voltage stabilizing didoe ZD1, the negative level of described voltage stabilizing didoe ZD1 links to each other with the negative electrode of diode D9 and the positive pole of described capacitor C15, the minus earth of described capacitor C15, the anode of described diode D9 links to each other with secondary 7 ends of described transformer T1, secondary 5 ends of described transformer T1 link to each other with the collector electrode of described triode Q6, described transformer secondary mid point 6 end ground connection.Described rectification filtering module comprises rectifier bridge heap T, diode D8, resistance R 30 and capacitor C 11,1 end of described rectifier bridge heap T links to each other with ACN with alternating current input ACL respectively with 3 ends, 4 end ground connection, 3 ends link to each other with the anode of diode D8, the negative electrode of described diode D8 links to each other through the positive pole of resistance R 30 with described capacitor C 11, the negative level ground connection of described capacitor C 11, the just very described output voltage terminal A of described capacitor C 11.
In second embodiment of the present utility model shown in Fig. 6, described voltage control module further comprises: resistance R 52, R53, R33, R47, R48, R49, R50, R51, capacitor C 12, C20, C21, C23 and diode D7, D10, wherein, described resistance R 52, be connected to the base stage of the output voltage terminal A and the described triode Q5 of described rectification filtering module after the R53 series connection, be connected to after described resistance R 33 and 12 parallel connections of described capacitor C between former limit 1 end of the negative electrode of described diode D7 and described transformer, the anode of described diode D7 is connected to the former limit of described transformer 4 ends.Described resistance R 47 1 ends link to each other with the emitter of triode Q5, an end ground connection, the anode of described diode D10 links to each other with the emitter of described triode Q5, negative electrode is through resistance R 48 ground connection, described capacitor C 20 1 ends link to each other with the anode of described diode D10, and the other end links to each other with the negative electrode of described diode D10.Described resistance R 49 is connected between the positive pole of 5 ends of described transformer T1 and described voltage stabilizing didoe ZD1, between the collector electrode of described resistance R 50 and 5 ends that are connected to described transformer T1 after capacitor C 21 is connected and described triode Q6.Described resistance C23 is in parallel with described diode D9, and described resistance R 51 is connected between the base stage of the anode of described voltage stabilizing didoe ZD1 and described triode Q6.
Its operation principle is as follows: alternating current is after rectifier bridge heap T rectification, through D8, R30, obtain a 310V left and right sides direct voltage (when interchange is input as the 220V power supply) behind the C11 rectifying and wave-filtering, this direct voltage is through R52, R53 is added to the base stage of triode Q5, make triode Q5 conducting, from 1 to 4 extreme direction has electric current to flow through in the former limit of transformer T1,1 end and 5 ends are end of the same name, and the former limit of transformer T1 produces 1 end for just, and 4 ends are negative induced voltage, this induced voltage makes the secondary of transformer T1 produce 7 ends for negative, 5 ends are positive voltage, and this voltage is through R49, R51 is added to the base stage of triode Q6, along with triode Q5 conducting, pressure drop on the resistance R 48 continues to increase, the cathode voltage of voltage stabilizing didoe ZD1 is constantly risen, when the cathode voltage of voltage stabilizing didoe ZD1 rises to certain numerical value, triode Q6 conducting, the collector voltage of triode Q6 approaches 0V, and triode Q5 is ended.Because inductive current can not suddenly change, just produce 4 ends in the former limit of transformer T1 and be, the induced voltage of 1 end for bearing, make the induced voltage of T1 secondary become 5 ends for negative, 7 ends are for just, this moment, the secondary of transformer T1 charged to capacitor C 15 by diode D9, output voltage U 0 will rise, when U0 is higher than 18V, voltage stabilizing didoe ZD1 conducting, triode Q6 base voltage is 0V, triode Q6 is ended, triode Q5 base voltage raises, when triode Q5 base voltage surpasses 0.7V, and triode Q5 conducting again, repeat this process, Switching Power Supply just can have been worked.
This scheme is compared with the scheme that adopts VIPer12A or FSD200 control chip, and its advantage is to have simplified circuit design, has reduced cost, has improved the power output of Switching Power Supply.
The utility model also further provides a kind of electromagnetic oven that uses this switching power circuit.Those skilled in the art know that this kind switching power circuit not only can be used for electromagnetic oven, can also be used for other similar field and electrical equipment.Protection range of the present utility model is not subjected to the restriction of its application.
The utility model is described according to specific embodiment, but it will be understood by those skilled in the art that when not breaking away from the utility model scope, can carry out various variations and be equal to replacement.In addition, for adapting to the specific occasion or the material of the utility model technology, can carry out many modifications and not break away from its protection range the utility model.Therefore, the utility model is not limited to specific embodiment disclosed herein, and comprises that all drop into the embodiment of claim protection range.
Claims (10)
1, a kind of switching power circuit, comprise rectification filtering module and voltage control module, it is characterized in that, described voltage control module comprises: triode Q5, Q6, transformer T1, diode D9, voltage stabilizing didoe ZD1 and capacitor C 15, the base stage of wherein said triode Q5 is connected to the output voltage terminal A of rectification filtering module, the collector electrode of described triode Q5 is connected to former limit 4 ends of described transformer T1, former limit 1 end of described transformer T1 is connected to the output voltage terminal A of described rectification filtering module, the grounded emitter of described triode Q5, the collector electrode of described triode Q6 links to each other with the base stage of described triode Q5, the grounded emitter of described triode Q6, base stage links to each other with the positive pole of voltage stabilizing didoe ZD1, the negative level of described voltage stabilizing didoe ZD1 links to each other with the negative electrode of diode D9 and the positive pole of described capacitor C15, the minus earth of described capacitor C15, the anode of described diode D9 links to each other with secondary 7 ends of described transformer T1, secondary 5 ends of described transformer T1 link to each other with the collector electrode of described triode Q6, described transformer secondary mid point 6 end ground connection.
2, according to the described switching power circuit of claim 1, it is characterized in that, described voltage control module further comprises: resistance R 52, R53, R33, capacitor C 12 and diode D7, wherein, be connected to the base stage of the output voltage terminal A and the described triode Q5 of described rectification filtering module after described resistance R 52, the R53 series connection, be connected to after described resistance R 33 and 12 parallel connections of described capacitor C between former limit 1 end of the negative electrode of described diode D7 and described transformer, the anode of described diode D7 is connected to the former limit of described transformer 4 ends.
3, according to the described switching power circuit of claim 1, it is characterized in that, described voltage control module further comprises: resistance R 47, R48, diode D10 and capacitor C 20, wherein said resistance R 47 1 ends link to each other with the emitter of triode Q5, an end ground connection, the anode of described diode D10 links to each other with the emitter of described triode Q5, negative electrode is through resistance R 48 ground connection, and described capacitor C 20 1 ends link to each other with the anode of described diode D10, and the other end links to each other with the negative electrode of described diode D10.
4, according to the described switching power circuit of claim 1, it is characterized in that, described voltage control module further comprises: resistance R 49, R50 and capacitor C 21, described resistance R 49 is connected between the positive pole of 5 ends of described transformer T1 and described voltage stabilizing didoe ZD1, between the collector electrode of described resistance R 50 and 5 ends that are connected to described transformer T1 after capacitor C 21 is connected and described triode Q6.
5, according to the described switching power circuit of claim 1, it is characterized in that, described voltage control module further comprises: capacitor C 23 and resistance R 51, wherein said resistance C23 is in parallel with described diode D9, and described resistance R 51 is connected between the base stage of the anode of described voltage stabilizing didoe ZD1 and described triode Q6.
6, according to the described switching power circuit of claim 1, it is characterized in that, described rectification filtering module comprises rectifier bridge heap T, diode D8, resistance R 30 and capacitor C 11,1 end of described rectifier bridge heap T links to each other with ACN with alternating current input ACL respectively with 3 ends, 4 end ground connection, 3 ends link to each other with the anode of diode D8, and the negative electrode of described diode D8 links to each other through the positive pole of resistance R 30 with described capacitor C 11, the negative level ground connection of described capacitor C 11, the just very described output voltage terminal A of described capacitor C 11.
7, a kind of electromagnetic oven, comprise body of heater, be arranged on described body of heater switch inside power circuit, described switching power circuit comprises rectification filtering module and voltage control module, it is characterized in that, described voltage control module comprises: triode Q5, Q6, transformer T1, diode D9, voltage stabilizing didoe ZD1 and capacitor C 15, the base stage of wherein said triode Q5 is connected to the output voltage terminal A of rectification filtering module, the collector electrode of described triode Q5 is connected to former limit 4 ends of described transformer T1, former limit 1 end of described transformer T1 is connected to the output voltage terminal A of described rectification filtering module, the grounded emitter of described triode Q5, the collector electrode of described triode Q6 links to each other with the base stage of described triode Q5, the grounded emitter of described triode Q6, base stage links to each other with the positive pole of voltage stabilizing didoe ZD1, the negative level of described voltage stabilizing didoe ZD1 links to each other with the negative electrode of diode D9 and the positive pole of described capacitor C15, the minus earth of described capacitor C15, the anode of described diode D9 links to each other with secondary 7 ends of described transformer T1, secondary 5 ends of described transformer T1 link to each other with the collector electrode of described triode Q6, described transformer secondary mid point 6 end ground connection.
8, according to the described electromagnetic oven of claim 7, it is characterized in that, described voltage control module further comprises: resistance R 52, R53, R33, capacitor C 12 and diode D7, wherein, be connected to the base stage of the output voltage terminal A and the described triode Q5 of described rectification filtering module after described resistance R 52, the R53 series connection, be connected to after described resistance R 33 and 12 parallel connections of described capacitor C between former limit 1 end of the negative electrode of described diode D7 and described transformer, the anode of described diode D7 is connected to the former limit of described transformer 4 ends.
9, according to the described electromagnetic oven of claim 7, it is characterized in that, described voltage control module further comprises: resistance R 47, R48, diode D10 and capacitor C 20, wherein said resistance R 47 1 ends link to each other with the emitter of triode Q5, an end ground connection, the anode of described diode D10 links to each other with the emitter of described triode Q5, negative electrode is through resistance R 48 ground connection, and described capacitor C 20 1 ends link to each other with the anode of described diode D10, and the other end links to each other with the negative electrode of described diode D10.
10, according to the described electromagnetic oven of claim 7, it is characterized in that, described rectification filtering module comprises rectifier bridge heap T, diode D8, resistance R 30 and capacitor C 11,1 end of described rectifier bridge heap T links to each other with ACN with alternating current input ACL respectively with 3 ends, 4 end ground connection, 3 ends link to each other with the anode of diode D8, and the negative electrode of described diode D8 links to each other through the positive pole of resistance R 30 with described capacitor C 11, the negative level ground connection of described capacitor C 11, the just very described output voltage terminal A of described capacitor C 11.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008202128226U CN201290186Y (en) | 2008-10-24 | 2008-10-24 | Switch power circuit and electromagnetic stove using the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008202128226U CN201290186Y (en) | 2008-10-24 | 2008-10-24 | Switch power circuit and electromagnetic stove using the same |
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| Publication Number | Publication Date |
|---|---|
| CN201290186Y true CN201290186Y (en) | 2009-08-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008202128226U Expired - Fee Related CN201290186Y (en) | 2008-10-24 | 2008-10-24 | Switch power circuit and electromagnetic stove using the same |
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| Country | Link |
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| CN (1) | CN201290186Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU2017279560B2 (en) * | 2017-03-31 | 2019-08-08 | Fujian Mindong Electric Corp., Ltd. | Power supply for smart pump controller |
-
2008
- 2008-10-24 CN CNU2008202128226U patent/CN201290186Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU2017279560B2 (en) * | 2017-03-31 | 2019-08-08 | Fujian Mindong Electric Corp., Ltd. | Power supply for smart pump controller |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090812 Termination date: 20161024 |
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| CF01 | Termination of patent right due to non-payment of annual fee |