CN201134946Y - Main power tube controlling circuit - Google Patents
Main power tube controlling circuit Download PDFInfo
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- CN201134946Y CN201134946Y CNU2008200008022U CN200820000802U CN201134946Y CN 201134946 Y CN201134946 Y CN 201134946Y CN U2008200008022 U CNU2008200008022 U CN U2008200008022U CN 200820000802 U CN200820000802 U CN 200820000802U CN 201134946 Y CN201134946 Y CN 201134946Y
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- 238000001514 detection method Methods 0.000 claims description 23
- 238000010438 heat treatment Methods 0.000 abstract description 2
- 239000003990 capacitor Substances 0.000 description 8
- 230000010355 oscillation Effects 0.000 description 6
- 238000010586 diagram Methods 0.000 description 4
- 238000010411 cooking Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000012797 qualification Methods 0.000 description 1
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Abstract
The utility model provides a main power tube control circuit for an electromagnetic oven, which comprises a switch circuit, wherein the switch circuit comprises a rectifier bridge and a control circuit, wherein the input end of the rectifier bridge is connected with a power supply, and the output end is connected with the load of the electromagnetic oven to realize the load power, and the rectifier bridge comprises a one-way thyristor, and the input end of the control circuit is connected with an operating circuit, and the output end is connected with the control end of the one-way thyristor, and the control circuit can control the make-break of the one-way thyristor through the instructions from the operating circuit. The main power tube control circuit of the utility model realizes the continuous low power heating of the electromagnetic oven through controlling half waves of an IGBT which work on the commercial power, reduces the switching loss of the IGBT, and prolongs the service life of the IGBT.
Description
Technical field
The utility model relates to electromagentic furnace technology, relates in particular to a kind of main power tube control circuit of electromagnetic oven.
Background technology
Existing electromagnetic oven is worked on complete two half-waves of civil power, this working method is uncontrollable, when electromagnetic oven needs continuously the output low-power, can only realize heating continuously with lowest power 800W, otherwise IGBT (main power tube) can be because switching loss increases, make the device temperature rise make the complete machine job insecurity, can't realize high-powerly exporting (2000W even higher), again can continuous low power the problem of output (200W even lower).
In order to reduce the IGBT temperature rise, the minimum power output of electromagnetic oven is limited in more than the higher relatively value (800W), export lower power if desired, can only make average output power reach a lower numerical value and realize with intermittently used mode (promptly circulating) in high power output with between quitting work.This mode can not realize continuous low-power output, has not only brought unnecessary electromagnetic impact, has also influenced the result of use of electromagnetic oven in some cooking, has limited the scope of application of electromagnetic oven.
The utility model content
The purpose of this utility model is to propose a kind of main power tube control circuit that is used for electromagnetic oven, and the half-wave by control IGBT is operated in civil power makes electromagnetic oven internal temperature rise when exporting low-power continuously unaffected.
For achieving the above object, the main power tube control circuit that is used for electromagnetic oven of the present utility model comprises switching circuit, and switching circuit comprises: rectifier bridge, and the input of rectifier bridge connects power supply, output connects the load of electromagnetic oven to realize bearing power, and rectifier bridge comprises one-way SCR; And control circuit, the input attended operation circuit of control circuit, output connects the control end of one-way SCR, and the control circuit basis is from the break-make of the commands for controlling one-way SCR of function circuit.
Rectifier bridge comprises an one-way SCR D6 and three diode D1, D2, and D3, one-way SCR is connected with three diodes.
Control circuit comprises: first capacitor C, 1, the second capacitor C, 2, the four resistance R, 4, the five resistance R, 5, the four diode D4, the 5th diode D5, the pulse transformer T and the second triode Q2; Wherein, the 4th diode D4 is with in parallel with first capacitor C 1 again after the output of pulse transformer T is connected, and back in parallel one end connects one-way SCR D6, and the other end that the other end connects the 4th resistance R 4, the four resistance R 4 connects one-way SCR D6; The second triode Q2 and the 5th diode D5 are in parallel and is connected the input of pulse transformer T with second capacitor C, 2 series connection backs, one end, and the other end and the 5th resistance R 5 are connected, and the 5th resistance R 5 is connected with function circuit.
The main power tube control circuit also comprises voltage zero-crossing detection circuit, and voltage zero-crossing detection circuit is connected with function circuit respectively with switching circuit.
Voltage zero-crossing detection circuit comprises: first resistance R 1, the second resistance R, 2, the three resistance R 3 and the first triode Q1, and the first triode Q1 is connected first resistance R 1 with second resistance R, 2 backs in parallel, one end, and the other end connects the 3rd resistance R 3.
The utility model also proposes a kind of main power tube control circuit that is used for electromagnetic oven and comprises: switching circuit, and switching circuit comprises: rectifier bridge, it comprises four diode D1 of connection, D2, D3, D7; And relay, any one diode of its series connection rectifier bridge; The control end attended operation circuit of relay, relay is according to instruction conducting and disconnection from function circuit.
The main power tube control circuit also comprises voltage zero-crossing detection circuit, and voltage zero-crossing detection circuit is connected with function circuit respectively with switching circuit.
The utility model also proposes a kind of main power tube control circuit that is used for electromagnetic oven and comprises: rectifier bridge, and it comprises four diode D1 of bridge joint, D2, D3, D7; And switching circuit, it comprises relay and the diode D8 that is connected in parallel, and the positive pole of diode D8 connects the zero line of power supply, and the negative pole of diode D8 connects between diode D3 and the diode D7; The control end attended operation circuit of relay, it is according to instruction conducting and disconnection from function circuit.
The main power tube control circuit also comprises voltage zero-crossing detection circuit, and voltage zero-crossing detection circuit is connected with function circuit respectively with rectifier bridge.
By the main power tube control circuit that the utility model proposes, be operated in the half-wave of civil power by control IGBT, the realization electromagnetic oven can be exported 200W to 2000W even higher power continuously, and has reduced the switching loss of IGBT, has prolonged the useful life of IGBT.
Description of drawings
Accompanying drawing described herein is used to provide further understanding of the present utility model, constitutes the application's a part, and illustrative examples of the present utility model and explanation thereof are used to explain the utility model, do not constitute improper qualification of the present utility model.In the accompanying drawings:
Fig. 1 is a main power tube control circuit device block diagram of the present utility model;
Fig. 2 is the circuit diagram of embodiment of the present utility model;
Fig. 3 is the circuit diagram of another embodiment of the present utility model; And
Fig. 4 is the circuit diagram of an embodiment more of the present utility model.
Embodiment
Below with reference to accompanying drawing, describe embodiment of the present utility model in detail.
The main power tube control circuit that is used for electromagnetic oven of the present utility model, as shown in Figure 1, this circuit comprises switching circuit 101, function circuit 102 and voltage zero-crossing detection circuit 103, and voltage zero-crossing detection circuit 103 is connected with function circuit 102 respectively with switching circuit 101.Wherein, switching circuit 101 comprises: rectifier bridge 1011, and its input connects power supply, and its output connects the load of electromagnetic oven to realize bearing power, and rectifier bridge 1011 comprises one-way SCR; And control circuit 1012, its input attended operation circuit 102, its output connects the control end of one-way SCR, and control circuit 1012 bases are from the break-make of the commands for controlling one-way SCR of function circuit 102.
As shown in Figure 2, rectifier bridge comprises: an one-way SCR D6 and three diode D1, and D2, D3, one-way SCR is connected with three diodes; Control circuit comprises: first capacitor C, 1, the second capacitor C, 2, the four resistance R, 4, the five resistance R, 5, the four diode D4, the 5th diode D5, the pulse transformer T and the second triode Q2; Wherein, the 4th diode D4 is with in parallel with first capacitor C 1 again after the output of pulse transformer T is connected, and back in parallel one end connects one-way SCR D6, and the other end that the other end connects the 4th resistance R 4, the four resistance R 4 connects one-way SCR D6; The second triode Q2 and the 5th diode D5 are in parallel and be connected the input of pulse transformer T with second capacitor C, 2 series connection backs, one end, the other end and 5 series connection of the 5th resistance R, the 5th resistance R 5 is connected with the input/output port (I/O) of function circuit, and this function circuit is a microcomputer.
Voltage zero-crossing detection circuit comprises: first resistance R 1, the second resistance R, 2, the three resistance R 3 and the first triode Q1, and the first triode Q1 is connected first resistance R 1 with second resistance R, 2 backs in parallel, one end, and the other end connects the 3rd resistance R 3.
Control circuit is according to the break-make from the associative operation commands for controlling one-way SCR D6 of function circuit, thereby power supply is switched between half-wave and all-wave.When electromagnetic oven output low-power (below the 800W), D6 disconnects, when voltage zero-cross, and the IGBT starting of oscillation, more automatically adjusted according to setting power and measured power by software the cycle of oscillation of IGBT; When the electromagnetic oven output high-power (more than the 800W), the D6 conducting, the same with existing electromagnetic oven.
The utility model also proposes a kind of main power tube control circuit that is used for electromagnetic oven, and as shown in Figure 3, this circuit comprises: switching circuit, and switching circuit comprises: rectifier bridge, rectifier bridge comprise four diode D1 that connect successively, D2, D3, D7; And relay K, any one diode of its rectifier bridge of can connecting, as shown in the figure, relay K is connected with diode D7, the control end attended operation circuit of relay K, relay K is according to instruction conducting and disconnection from function circuit, and this function circuit is a microcomputer.
Wherein, the main power tube control circuit also comprises voltage zero-crossing detection circuit, and voltage zero-crossing detection circuit is connected with the function circuit (not shown) respectively with switching circuit.Voltage zero-crossing detection circuit comprises: first resistance R 1, the second resistance R, 2, the three resistance R 3 and the first triode Q1, and the first triode Q1 is connected first resistance R 1 with second resistance R, 2 backs in parallel, one end, and the other end connects the 3rd resistance R 3.
Relay K is according to associative operation instruction conducting and disconnection from function circuit, and K and D7 make power supply switch between half-wave and all-wave together.When electromagnetic oven output low-power (below the 800W), K disconnects, when voltage zero-cross, and the IGBT starting of oscillation, more automatically adjusted according to setting power and measured power by software the cycle of oscillation of IGBT; When the electromagnetic oven output high-power (more than the 800W), the K conducting, the same with existing electromagnetic oven.
The utility model also proposes a kind of main power tube control circuit that is used for electromagnetic oven, and as shown in Figure 4, this circuit comprises: rectifier bridge, and it comprises four diode D1 of bridge joint, D2, D3, D7; And switching circuit, it comprises relay K and the diode D8 that is connected in parallel, and the positive pole of diode D8 connects the zero line of power supply, and the negative pole of diode D8 connects between diode D3 and the diode D7; The control end attended operation circuit of relay K, it is according to instruction conducting and disconnection from function circuit, and this function circuit is a microcomputer.
Wherein, the main power tube control circuit also comprises voltage zero-crossing detection circuit, and voltage zero-crossing detection circuit is connected with the function circuit (not shown) respectively with rectifier bridge.Voltage zero-crossing detection circuit comprises: first resistance R 1, the second resistance R, 2, the three resistance R 3 and the first triode Q1, and the first triode Q1 is connected first resistance R 1 with second resistance R, 2 backs in parallel, one end, and the other end connects the 3rd resistance R 3.
Relay K is according to associative operation instruction conducting and disconnection from function circuit, and K and D8 make power supply switch between half-wave and all-wave together.When electromagnetic oven output low-power (below the 800W), K disconnects, when voltage zero-cross, and the IGBT starting of oscillation, more automatically adjusted according to setting power and measured power by software the cycle of oscillation of IGBT; When the electromagnetic oven output high-power (more than the 800W), the K conducting, the same with existing electromagnetic oven.
The above is a preferred embodiment of the present utility model only, is not limited to the utility model, and for a person skilled in the art, the utility model can have various changes and variation.All within spirit of the present utility model and principle, any modification of being done, be equal to replacement, improvement etc., all should be included within the protection range of the present utility model.
Claims (9)
1. a main power tube control circuit that is used for electromagnetic oven is characterized in that, comprise switching circuit, described switching circuit comprises:
Rectifier bridge, the input of described rectifier bridge connects power supply, and output connects the load of described electromagnetic oven to realize described bearing power, and described rectifier bridge comprises one-way SCR; And
Control circuit, the input attended operation circuit of described control circuit, output connects the control end of described one-way SCR, and described control circuit basis is from the break-make of the described one-way SCR of commands for controlling of described function circuit.
2. main power tube control circuit according to claim 1 is characterized in that, described rectifier bridge comprises that (D3), described one-way SCR is connected with described three diodes for D1, D2 for an one-way SCR (D6) and three diodes.
3. main power tube control circuit according to claim 2, it is characterized in that, described control circuit comprises: first electric capacity (C1), second electric capacity (C2), the 4th resistance (R4), the 5th resistance (R5), the 4th diode (D4), the 5th diode (D5), pulse transformer (T) and second triode (Q2);
Wherein, described the 4th diode (D4) is with in parallel with described first electric capacity (C1) again after the output of described pulse transformer (T) is connected, back in parallel one end connects described one-way SCR (D6), the other end connects described the 4th resistance (R4), and the other end of described the 4th resistance (R4) connects described one-way SCR (D6); Described second triode (Q2) and described the 5th diode (D5) are in parallel and be connected the input of described pulse transformer (T) with described second electric capacity (C2) series connection back one end, the other end and described the 5th resistance (R5) series connection, described the 5th resistance (R5) is connected with described function circuit.
4. according to claim 1,2 or 3 described main power tube control circuits, it is characterized in that described main power tube control circuit also comprises voltage zero-crossing detection circuit, described voltage zero-crossing detection circuit is connected with function circuit respectively with described switching circuit.
5. main power tube control circuit according to claim 4, it is characterized in that, described voltage zero-crossing detection circuit comprises: first resistance (R1), second resistance (R2), the 3rd resistance (R3) and first triode (Q1), described first triode (Q1) is connected described first resistance (R1) with described second resistance (R2) back in parallel one end, and the other end connects described the 3rd resistance (R3).
6. a main power tube control circuit that is used for electromagnetic oven is characterized in that, comprise switching circuit, described switching circuit comprises:
Rectifier bridge, described rectifier bridge comprise connection four diodes (D1, D2, D3, D7); And
Connect any one diode of described rectifier bridge of relay, described relay; The control end attended operation circuit of described relay, described relay is according to instruction conducting and disconnection from described function circuit.
7. main power tube control circuit according to claim 6 is characterized in that, described main power tube control circuit also comprises voltage zero-crossing detection circuit, and described voltage zero-crossing detection circuit is connected with described function circuit respectively with described switching circuit.
8. a main power tube control circuit that is used for electromagnetic oven is characterized in that, comprising:
Rectifier bridge, described rectifier bridge comprise bridge joint four diodes (D1, D2, D3, D7); And
Switching circuit, described switching circuit comprise relay and the diode (D8) that is connected in parallel, and the positive pole of described diode (D8) connects the zero line of power supply, and the negative pole of described diode (D8) is connected between diode (D3) and the diode (D7);
The control end attended operation circuit of described relay, described relay is according to instruction conducting and disconnection from described function circuit.
9. main power tube control circuit according to claim 8 is characterized in that, described main power tube control circuit also comprises voltage zero-crossing detection circuit, and described voltage zero-crossing detection circuit is connected with described function circuit respectively with described rectifier bridge.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200008022U CN201134946Y (en) | 2008-01-07 | 2008-01-07 | Main power tube controlling circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200008022U CN201134946Y (en) | 2008-01-07 | 2008-01-07 | Main power tube controlling circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201134946Y true CN201134946Y (en) | 2008-10-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008200008022U Expired - Lifetime CN201134946Y (en) | 2008-01-07 | 2008-01-07 | Main power tube controlling circuit |
Country Status (1)
| Country | Link |
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| CN (1) | CN201134946Y (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102252355A (en) * | 2011-08-05 | 2011-11-23 | 美的集团有限公司 | Control method for continuous low-power heating of induction cooker |
| CN106016386A (en) * | 2016-07-08 | 2016-10-12 | 张玉清 | Induction cooker with continuously-adjustable power |
| JP2018515739A (en) * | 2015-11-27 | 2018-06-14 | 佛山市順徳区美的電熱電器制造有限公司 | Electromagnetic heating device |
| CN109905932A (en) * | 2019-03-12 | 2019-06-18 | 九阳股份有限公司 | A kind of Poewr control method of electromagnetic heater |
| CN110708780A (en) * | 2019-09-04 | 2020-01-17 | 九阳股份有限公司 | Rectifier bridge stack for electromagnetic heating control and electromagnetic heating circuit |
-
2008
- 2008-01-07 CN CNU2008200008022U patent/CN201134946Y/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102252355A (en) * | 2011-08-05 | 2011-11-23 | 美的集团有限公司 | Control method for continuous low-power heating of induction cooker |
| JP2018515739A (en) * | 2015-11-27 | 2018-06-14 | 佛山市順徳区美的電熱電器制造有限公司 | Electromagnetic heating device |
| CN106016386A (en) * | 2016-07-08 | 2016-10-12 | 张玉清 | Induction cooker with continuously-adjustable power |
| CN106016386B (en) * | 2016-07-08 | 2019-03-12 | 张玉清 | A kind of electromagnetic oven that power is continuously adjustable |
| CN109905932A (en) * | 2019-03-12 | 2019-06-18 | 九阳股份有限公司 | A kind of Poewr control method of electromagnetic heater |
| CN110708780A (en) * | 2019-09-04 | 2020-01-17 | 九阳股份有限公司 | Rectifier bridge stack for electromagnetic heating control and electromagnetic heating circuit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: GREE ELECTRIC APPLIANCES (ZHONGSHAN) SMALL HOUSEHOLD APPLIANCES MANUFACTURING Co.,Ltd. Assignor: GREE ELECTRIC APPLIANCES,Inc.OF ZHUHAI Contract record no.: 2011440001014 Denomination of utility model: Main power tube controlling circuit Granted publication date: 20081015 License type: Exclusive License Record date: 20111021 |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20081015 |