CN201663720U - Induction cooker controller with IGBT protective circuit and induction cooler - Google Patents
Induction cooker controller with IGBT protective circuit and induction cooler Download PDFInfo
- Publication number
- CN201663720U CN201663720U CN2009202623887U CN200920262388U CN201663720U CN 201663720 U CN201663720 U CN 201663720U CN 2009202623887 U CN2009202623887 U CN 2009202623887U CN 200920262388 U CN200920262388 U CN 200920262388U CN 201663720 U CN201663720 U CN 201663720U
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- protective circuit
- electromagnetic oven
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Abstract
The utility model relates to an induction cooker controller with an IGBT protective circuit. The induction cooker controller comprises an IGBT, an IGBT driving circuit and an IGBT protective circuit, wherein the IGBT driving circuit and the IGBT protective circuit are connected to an IGBT input end. The IGBT protective circuit is connected to an input end of the IGBT driving circuit, and controls the IGBT driving circuit to input low level to an IGBT grid electrode when an induction cooker is electrified. The utility model further provides an induction cooker. When the induction cooker is turned on and VCC is lower than +18V, the induction cooker controller with an IGBT protective circuit can ensure driving voltage of the IGBT grid electrode to be in low level, thereby guaranteeing the IGBT against being damaged when just being electrified or in fast plugging and unplugging.
Description
Technical field
The utility model relates to electromagnetic oven, relates in particular to and have insulated gate bipolar transistor (InsulatedGate Bipolar Transistor, IGBT) the electromagnetic oven controller of protective circuit and use the electromagnetic oven of this electromagnetic oven controller.
Background technology
Electromagnetic oven is when just powering on, because insulated gate bipolar transistor (Insulated Gate BipolarTransistor, IGBT) special job specification, if be enough to make the IGBT conducting at the driving stage grid generation certain width of IGBT and the pulse signal of amplitude, this moment, IGBT may be in magnifying state or saturation condition.Because the voltage of collector electrode was very high when IGBT was in magnifying state, power consumption is very big when IGBT flows through certain electric current, and IGBT is in magnifying state than the easier damage of saturation condition IGBT.Therefore,, just might when just powering on, cause the IGBT transient flow to cross the long period overcurrent, IGBT is damaged when the IGBT conducting is uncontrolled.Last electric protection has certain safeguard measure to prior art to the IGBT of electromagnetic oven, but because circuit design is reasonable inadequately, the protection effect is unsatisfactory, often occurs electromagnetic oven just damages IGBT when just powering on problem.
The utility model content
The purpose of this utility model is to provide a kind of electromagnetic oven controller and electromagnetic oven of the IGBT of having protective circuit, to solve existing electromagnetic oven damages IGBT when just powering on problem.
The utility model provides a kind of electromagnetic oven controller of the IGBT of having protective circuit to comprise IGBT and is connected in the IGBT drive circuit and the IGBT protective circuit of IGBT input.The IGBT protective circuit is connected in the input of IGBT drive circuit, and the IGBT protective circuit is when electromagnetic oven powers on, and the voltage that control IGBT drive circuit is imported to the IGBT grid is low level.
Preferably, the electromagnetic oven controller of the above-mentioned IGBT of having protective circuit also comprises the synchronized oscillation signal output apparatus, is connected in the output of IGBT protective circuit and the input of IGBT drive circuit.
Preferably, the electromagnetic oven controller of the above-mentioned IGBT of having protective circuit comprises that also MCU is connected in the output of synchronized oscillation signal output apparatus and IGBT protective circuit, and the input that is connected in the IGBT drive circuit.
Preferably, above-mentioned IGBT protective circuit comprises divider resistance R2, and the divider resistance R3 that connects with divider resistance R2.
Preferably, above-mentioned IGBT protective circuit also comprises and divider resistance R2 diode connected in parallel D1, and the capacitor C 1 in parallel with divider resistance R3.
Preferably, above-mentioned IGBT protective circuit also comprises pull-up resistor R1, triode VT2 and voltage stabilizing didoe Z1, and the end of voltage stabilizing didoe Z1 is connected between divider resistance R2 and the R3, and the other end is connected in the base stage of triode VT2; The grounded emitter of triode VT2, collector electrode are connected in pull-up resistor R1.
Preferably, above-mentioned IGBT protective circuit also comprises triode VT2, and the base stage of triode VT1 is connected in the collector electrode of triode VT2, grounded emitter, and collector electrode is connected in the input of IGBT drive circuit.
The utility model also provides a kind of electromagnetic oven, comprises the electromagnetic oven controller of the above-mentioned IGBT of having protective circuit.
The electromagnetic oven controller of the IGBT of having protective circuit of the present utility model just powers at electromagnetic oven, and VCC also do not reach+during 18V, the gate drive voltage of control IGBT is a low level, thereby guarantees that IGBT is just powering on and can not damage during the fast insert-pull electricity.
Description of drawings
Fig. 1 is the structural representation that the utlity model has the electromagnetic oven controller of IGBT protective circuit.
Embodiment
Below in conjunction with the drawings and specific embodiments technical solutions of the utility model are described in further detail, so that those skilled in the art can better understand the utility model and being implemented, but illustrated embodiment is not as to qualification of the present utility model.
Fig. 1 is the structural representation that the utlity model has the electromagnetic oven controller of IGBT protective circuit.
The electromagnetic oven controller that the utlity model has the IGBT protective circuit comprises insulated gate bipolar transistor (Insulated Gate Bipolar Transistor; IGBT) 104 and be connected in the IGBT drive circuit 103 and the IGBT protective circuit 101 of IGBT104 input.IGBT protective circuit 101 is connected in the input of IGBT drive circuit 103, and IGBT protective circuit 101 is when electromagnetic oven powers on, and the voltage that control IGBT drive circuit 103 is imported to the IGBT104 grid is low level.
Further, the electromagnetic oven controller that the utlity model has the IGBT protective circuit also comprises synchronized oscillation signal output apparatus 102, is connected in the output of IGBT protective circuit 101 and the input of IGBT drive circuit 103.
Further; the electromagnetic oven controller that the utlity model has the IGBT protective circuit also comprises central controller (MCU) 105; be connected in the output of synchronized oscillation signal output apparatus 102 and IGBT protective circuit 101, and the input that is connected in IGBT drive circuit 103.
Further, above-mentioned IGBT protective circuit comprises divider resistance R2, divider resistance R3, diode D1, capacitor C 1, pull-up resistor R1, triode VT2, voltage stabilizing didoe Z1 and triode VT2.Wherein, divider resistance R3 connects with divider resistance R2.Diode D1 is in parallel with divider resistance R2, and capacitor C 1 is in parallel with divider resistance R3.The end of voltage stabilizing didoe Z1 is connected between divider resistance R2 and the R3, and the other end is connected in the base stage of triode VT2; The grounded emitter of triode VT2, collector electrode are connected in pull-up resistor R1.Triode VT2, the base stage of triode VT1 is connected in the collector electrode of triode VT2, grounded emitter, collector electrode is connected in the input of IGBT drive circuit.
The operation principle of electromagnetic oven controller that the utlity model has the IGBT protective circuit is as follows, and when electromagnetic oven powered on, VCC voltage began to rise from 0V, and the voltage that VCC voltage is imported to IGBT drive circuit 103 does not reach+18V.VCC voltage is after divider resistance R2 and divider resistance R3 dividing potential drop; to capacitor C 1 charging; as the voltage V1 at divider resistance R3 and capacitor C 1 two ends during less than the conducting voltage of voltage stabilizing didoe Z1; triode VT2 ends; VCC voltage makes triode VT1 conducting through pull-up resistor R1; the collector voltage V2 of triode VT1 is a low level near 0V; and the collector electrode of triode VT1 is connected to the input of synchronized oscillation signal output apparatus and IGBT drive circuit 103; when V2 is low level; this low level signal can be stable the output voltage V 3 of control IGBT drive circuit 103 be low level; thereby the grid voltage that makes IGBT104 is a low level; IGBT104 is in complete cut-off state, thereby protects IGBT104 can not damage when just powering on effectively.
When VCC voltage constantly rises, the tube voltage drop (0.7V) of base stage when V1 will add triode VT2 conducting greater than the conducting voltage of voltage stabilizing didoe Z1, triode VT2 conducting this moment, triode VT1 ends, the signal controlling that the collector voltage of triode VT1 is exported by synchronized oscillation signal output apparatus 102, V2 is no longer controlled by triode VT1, this moment is owing to VCC voltage surpasses+5V, reached the operating voltage of MCU105, the operating state of electromagnetic oven each several part circuit will be controlled by MCU105, control V2 that can be stable is a low level voltage, thereby the voltage that IGBT drive circuit 103 is exported is low level, the grid of guaranteeing IGBT104 is a low level, and IGBT104 is in cut-off state, thereby can guarantee that IGBT can not cause damage when just powering on.
When electromagnetic oven cuts off the power supply, the voltage of capacitor C 1 can be by divider resistance R3 discharge, can not make V1 be in higher voltage value for a long time, thereby make triode VT2 be in cut-off state in the time of can guaranteeing to power on next time, triode VT1 is in conducting state, so when electromagnetic oven fast insert-pull electricity IGBT104 can not damaged.
In addition, the utility model also provides a kind of electromagnetic oven controller that comprises the above-mentioned IGBT of having protective circuit, the electromagnetic oven that is provided in the present embodiment, and except the electromagnetic oven controller was different with existing electromagnetic oven, the structure of other parts was all identical with function.
In sum; electromagnetic oven controller with IGBT protective circuit of the present utility model just powers at electromagnetic oven, and VCC also do not reach+during 18V; the gate drive voltage of guaranteeing IGBT104 is a low level, thereby guarantees that IGBT104 can not damage when just powering on the fast insert-pull electricity.
It below only is preferred embodiment of the present utility model; be not so limit claim of the present utility model; every equivalent structure or equivalent flow process conversion that utilizes the utility model specification and accompanying drawing content to be done; or directly or indirectly be used in other relevant technical fields, all in like manner be included in the scope of patent protection of the present utility model.
Claims (8)
1. electromagnetic oven controller with insulated gate bipolar transistor IGBT protective circuit; comprise IGBT; with the IGBT drive circuit that is connected in described IGBT input; it is characterized in that; also comprise the IGBT protective circuit; be connected in the input of described IGBT drive circuit, described IGBT protective circuit is when electromagnetic oven powers on, and the voltage that control IGBT drive circuit is imported to the IGBT grid is low level.
2. the electromagnetic oven controller with insulated gate bipolar transistor IGBT protective circuit as claimed in claim 1; it is characterized in that; also comprise the synchronized oscillation signal output apparatus, be connected in the output of described IGBT protective circuit and the input of IGBT drive circuit.
3. the electromagnetic oven controller with insulated gate bipolar transistor IGBT protective circuit as claimed in claim 2; it is characterized in that; comprise that also MCU is connected in the output of described synchronized oscillation signal output apparatus and IGBT protective circuit, and the input that is connected in the IGBT drive circuit.
4. the electromagnetic oven controller with insulated gate bipolar transistor IGBT protective circuit as claimed in claim 1 is characterized in that described IGBT protective circuit comprises divider resistance R2, and the divider resistance R3 that connects with described divider resistance R2.
5. the electromagnetic oven controller with insulated gate bipolar transistor IGBT protective circuit as claimed in claim 4; it is characterized in that; described IGBT protective circuit also comprises and described divider resistance R2 diode connected in parallel D1, and the capacitor C 1 in parallel with described divider resistance R3.
6. the electromagnetic oven controller with insulated gate bipolar transistor IGBT protective circuit as claimed in claim 5, it is characterized in that, described IGBT protective circuit also comprises pull-up resistor R1, triode VT2 and voltage stabilizing didoe Z1, the end of voltage stabilizing didoe Z1 is connected between described divider resistance R2 and the R3, and the other end is connected in the base stage of triode VT2; The grounded emitter of described triode VT2, collector electrode are connected in pull-up resistor R1.
7. the electromagnetic oven controller with insulated gate bipolar transistor IGBT protective circuit as claimed in claim 6; it is characterized in that; described IGBT protective circuit also comprises triode VT2; the base stage of described triode VT1 is connected in the collector electrode of described triode VT2; grounded emitter, collector electrode are connected in the input of described IGBT drive circuit.
8. an electromagnetic oven is characterized in that, comprises as each described electromagnetic oven controller with insulated gate bipolar transistor IGPT protective circuit of claim 1 to 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202623887U CN201663720U (en) | 2009-12-31 | 2009-12-31 | Induction cooker controller with IGBT protective circuit and induction cooler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202623887U CN201663720U (en) | 2009-12-31 | 2009-12-31 | Induction cooker controller with IGBT protective circuit and induction cooler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201663720U true CN201663720U (en) | 2010-12-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009202623887U Expired - Fee Related CN201663720U (en) | 2009-12-31 | 2009-12-31 | Induction cooker controller with IGBT protective circuit and induction cooler |
Country Status (1)
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|---|---|
| CN (1) | CN201663720U (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102263544A (en) * | 2011-07-15 | 2011-11-30 | 武汉理工大学 | IGBT driving circuit with electrification protection |
| CN102548073A (en) * | 2011-12-31 | 2012-07-04 | 美的集团有限公司 | IGBT drive circuit of electromagnetic induction heating equipment |
| CN103840642A (en) * | 2012-11-27 | 2014-06-04 | 美的集团股份有限公司 | Electromagnetic heating device and drive circuit thereof |
| CN106357248A (en) * | 2015-07-17 | 2017-01-25 | 深圳市芯创微电子有限公司 | Induction cooker power-on IGBT (insulated gate bipolar transistor) protection method |
| CN107318183A (en) * | 2017-06-30 | 2017-11-03 | 浙江绍兴苏泊尔生活电器有限公司 | Electromagnetic oven |
| CN107635299A (en) * | 2016-07-18 | 2018-01-26 | 佛山市顺德区美的电热电器制造有限公司 | The driving chip of Electromagnetic Heating cooking system and its power switch pipe |
| CN108631761A (en) * | 2017-03-16 | 2018-10-09 | 佛山市顺德区美的电热电器制造有限公司 | The control device and method of electromagnetic heating system and power switch tube |
| CN108668392A (en) * | 2017-03-29 | 2018-10-16 | 佛山市顺德区美的电热电器制造有限公司 | The Drive Protecting Circuit and method of electromagnetic heating apparatus and its power switch tube |
| CN110389552A (en) * | 2019-07-25 | 2019-10-29 | 中国科学院西安光学精密机械研究所 | A kind of calibration that can eliminate risk and power control circuit |
-
2009
- 2009-12-31 CN CN2009202623887U patent/CN201663720U/en not_active Expired - Fee Related
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102263544A (en) * | 2011-07-15 | 2011-11-30 | 武汉理工大学 | IGBT driving circuit with electrification protection |
| CN102548073A (en) * | 2011-12-31 | 2012-07-04 | 美的集团有限公司 | IGBT drive circuit of electromagnetic induction heating equipment |
| CN102548073B (en) * | 2011-12-31 | 2014-12-10 | 美的集团股份有限公司 | IGBT (Insulated Gate Bipolar Transistor) drive circuit of electromagnetic induction heating equipment |
| CN103840642A (en) * | 2012-11-27 | 2014-06-04 | 美的集团股份有限公司 | Electromagnetic heating device and drive circuit thereof |
| CN106357248A (en) * | 2015-07-17 | 2017-01-25 | 深圳市芯创微电子有限公司 | Induction cooker power-on IGBT (insulated gate bipolar transistor) protection method |
| CN107635299A (en) * | 2016-07-18 | 2018-01-26 | 佛山市顺德区美的电热电器制造有限公司 | The driving chip of Electromagnetic Heating cooking system and its power switch pipe |
| CN107635299B (en) * | 2016-07-18 | 2021-06-18 | 佛山市顺德区美的电热电器制造有限公司 | Electromagnetic heating cooking system and driving chip of power switch tube thereof |
| CN108631761A (en) * | 2017-03-16 | 2018-10-09 | 佛山市顺德区美的电热电器制造有限公司 | The control device and method of electromagnetic heating system and power switch tube |
| CN108668392A (en) * | 2017-03-29 | 2018-10-16 | 佛山市顺德区美的电热电器制造有限公司 | The Drive Protecting Circuit and method of electromagnetic heating apparatus and its power switch tube |
| CN107318183A (en) * | 2017-06-30 | 2017-11-03 | 浙江绍兴苏泊尔生活电器有限公司 | Electromagnetic oven |
| CN107318183B (en) * | 2017-06-30 | 2020-09-08 | 浙江绍兴苏泊尔生活电器有限公司 | Electromagnetic oven |
| CN110389552A (en) * | 2019-07-25 | 2019-10-29 | 中国科学院西安光学精密机械研究所 | A kind of calibration that can eliminate risk and power control circuit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20101201 Termination date: 20171231 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |