CN202177471U - IGBT temperature measuring circuit used for induction cooker - Google Patents
IGBT temperature measuring circuit used for induction cooker Download PDFInfo
- Publication number
- CN202177471U CN202177471U CN 201120261386 CN201120261386U CN202177471U CN 202177471 U CN202177471 U CN 202177471U CN 201120261386 CN201120261386 CN 201120261386 CN 201120261386 U CN201120261386 U CN 201120261386U CN 202177471 U CN202177471 U CN 202177471U
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- igbt
- thermistor
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Abstract
The utility model provides an IGBT temperature measuring circuit used for an induction cooker. The IGBT circuit includes a thermistor, and a voltage-sharing resistor connecting with the thermistor in series. The thermistor is welded on a PCB at a position close to an E electrode pin of the IGBT. An ground terminal pin of the thermistor connects with the E electrode pin of the IGBT. The heat generated by the IGBT is transmitted to the thermistor through the E electrode pin of the IGBT. By adopting the novel thermistor installation technique in the utility model, the grounding terminal pin of the thermistor is welded with the E electrode of the IGBT directly, thereby realizing the temperature transmission of the IGBT. The welding of the temperature measuring circuit can be realized by adopting inserts and an SMT technique directly. Thus, external auxiliary parts are saved and no human intervention is needed. The production efficiency is improved, and the production cost is reduced.
Description
Technical field
The utility model relates to a kind of electromagnetic oven with IGBT temperature measurement circuit and new-type welding and assembling technics.
Background technology
Electromagnetic oven generally adopts thermistor as temperature sensor IGBT to be carried out temperature detection.Divider resistance and the thermistor fixing by resistance are composed in series series circuit, and 5V voltage and ground wire load said series circuit two ends respectively.Through heat conduction with the temperature transfer of IGBT to thermistor, the voltage of divider resistance and thermistor link can intuitively reflect the temperature of thermistor, the MCU of subband AD conversion carries out the detection of partial pressure value, cooperates software to carry out the temperature protection of IGBT.
At present, the thermistor of IGBT temperature detection adopts the conventional mounting mode: one, thermistor is encapsulated in the terminal, through holding screw said terminal and IGBT surface is fitted tightly, realize the heat conduction.Two, thermistor is installed in the rubber blanket, the thermistor pin passes said rubber blanket and is welded on the pcb board, and the heating radiator of IGBT or IGBT is pressed in said rubber blanket surface and directly contacts with the interior thermistor of said rubber blanket, realizes the heat conduction.The technology of tradition temperature measurement circuit needs to use extra auxiliary component, and cost height and mounting process are complicated, and labor intensive is more.
Summary of the invention
For avoiding existing electromagnetic oven to adopt the above-mentioned deficiency of the temperature measurement circuit of thermistor, the utility model provides a kind of improved electromagnetic oven to use the IGBT temperature measurement circuit, and it is with the E of thermistor pin and IGBT
Utmost point pin directly welds together, and the E utmost point pin through said IGBT conducts to thermistor with heat, realizes the IGBT temperature survey, can accomplish the welding of temperature measurement circuit with plug-in unit or SMT technology automatically.
The electromagnetic oven of the utility model is used the IGBT temperature sensing circuit; Comprise: thermistor and the divider resistance of connecting with this thermistor; This thermistor is welded on the pcb board position near the E utmost point pin of IGBT; The earth terminal pin of this thermistor is connected with the E utmost point pin of IGBT, and the heat that IGBT sends is delivered to this thermistor through its E utmost point pin.
Said thermistor can be selected the straight cutting thermistor for use, and the earth terminal pin of this straight cutting thermistor directly is connected with the E utmost point pin of said IGBT.
It is the paster thermistor that said thermistor also can be selected for use, and the earth terminal pin of this paster thermistor directly is connected with the E utmost point pin of said IGBT, or the E utmost point ground connection copper through IGBT on the pcb board is thin is connected with the E utmost point pin of said IGBT.
The electromagnetic oven of the utility model adopts thermistor to be welded on the pcb board E utmost point Pin locations near IGBT through plug-in unit or SMT technology with the IGBT temperature sensing circuit; The earth terminal pin of thermistor extremely directly is connected with the E of IGBT; The heat that while IGBT sends directly is delivered to this thermistor through E utmost point pin; The resistance of thermistor is along with temperature one changes, and through the divider resistance dividing potential drop of series connection, the AD detection mouth of signal being delivered to MCU carries out the AD conversion; Through program monitoring IGBT temperature, guarantee that IGBT is operated in safe range.
It adopts new-type thermistor mounting process; The earth terminal pin of thermistor and the E of IGBT are extremely directly welded together, realize the IGBT temperature transfer, can directly adopt plug-in unit or SMT technology to accomplish the welding of temperature measurement circuit automatically; Saved extra auxiliary component; Do not need artificial the participation, improved production efficiency, reduced production cost.
Directly utilize the pcb board wires design to realize new-type temperature measurement circuit technology, thermistor design and installation position is integrated on the pcb board IGBT temperature measurement circuit near the E utmost point of IGBT, need not additional parts.
Description of drawings
Fig. 1 is the schematic diagram of the utility model temperature measurement circuit;
Fig. 2 is straight cutting thermistor, the IGBT installation site synoptic diagram on PCB;
Fig. 3 is paster thermistor, the IGBT installation site synoptic diagram on PCB.
Embodiment
Specify below in conjunction with embodiment.
With reference to Fig. 1, electromagnetic oven mainly comprises with the IGBT temperature sensing circuit: thermistor RT1 and the divider resistance R33 that connects with thermistor RT1, filter capacitor C24 is parallelly connected with thermistor RT1.Thermistor RT1 can adopt straight cutting thermistor, paster thermistor or the like.
Fig. 2 is straight cutting thermistor, the IGBT installation site synoptic diagram on PCB.IGBT (1) is installed in above the pcb board (3); Straight cutting thermistor RT1 (2) is installed in above the pcb board (3) position near the E utmost point pin of IGBT (1); The E of the earth terminal pin of straight cutting thermistor RT1 (2) and IGBT (1) extremely directly welds together, and the heat that IGBT sends is directly delivered to straight cutting thermistor RT1 through its E utmost point pin, and straight cutting thermistor RT1 changes the temperature variation of IGBT into the change in resistance of self; Through bleeder circuit; Further change the variation of voltage division signal into, the size of partial pressure value is reaction IGBT temperature directly, and the AD mouth that branch pressure voltage is sent to the MCU that carries the AD conversion carries out analog to digital conversion.Further also can realize the influence of filtering interfering through certain algorithm, to improve the measuring accuracy of IGBT temperature in said MCU embedded digital filter to voltage division signal.
Fig. 3 is paster thermistor, the IGBT installation site synoptic diagram on PCB.IGBT (1) is installed in above the pcb board (3); Paster thermistor RT1 (2) is welded below pcb board (3) and near the position of the E utmost point pin of IGBT (1); The earth terminal pin of paster thermistor RT1 (2) is connected with the E utmost point pin of said IGBT through the E utmost point ground connection copper thin (not shown among Fig. 3) of the IGBT on the pcb board (3), and the heat that IGBT sends is through the thin straight cutting thermistor RT1 that is delivered to of E utmost point ground connection copper of its E utmost point pin, IGBT.
The earth terminal pin of paster thermistor RT1 (2) also can extremely directly weld together with the E of IGBT (1), and the heat that IGBT sends is directly delivered to straight cutting thermistor RT1 through its E utmost point pin.
The utility model is according to the product design needs, and above-mentioned thermistor and IGBT can be welded in the same one side of pcb board, also can be welded respectively above pcb board, below.
Claims (6)
1. an electromagnetic oven is used the IGBT temperature sensing circuit; It is characterized in that comprising: thermistor and the divider resistance of connecting with this thermistor; This thermistor is welded on the pcb board position near the E utmost point pin of IGBT; The earth terminal pin of this thermistor is connected with the E utmost point pin of this IGBT, and the heat that this IGBT sends is delivered to this thermistor through its E utmost point pin.
2. electromagnetic oven according to claim 1 is used the IGBT temperature sensing circuit, it is characterized in that: the earth terminal pin of said thermistor directly is connected with the E utmost point pin of said IGBT.
3. electromagnetic oven according to claim 1 is used the IGBT temperature sensing circuit, it is characterized in that: said thermistor is the straight cutting thermistor, and the earth terminal pin of this straight cutting thermistor directly is connected with the E utmost point pin of said IGBT.
4. electromagnetic oven according to claim 1 is used the IGBT temperature sensing circuit; It is characterized in that: said thermistor is the paster thermistor; The earth terminal pin of this paster thermistor directly is connected with the E utmost point pin of said IGBT, or the E utmost point ground connection copper through IGBT on the pcb board is thin is connected with the E utmost point pin of said IGBT.
5. electromagnetic oven according to claim 1 is used the IGBT temperature sensing circuit, it is characterized in that: said thermistor and IGBT are welded in the same one side of said pcb board.
6. electromagnetic oven according to claim 1 is used the IGBT temperature sensing circuit, it is characterized in that: said thermistor and IGBT be welded respectively above said pcb board, below.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120261386 CN202177471U (en) | 2011-07-22 | 2011-07-22 | IGBT temperature measuring circuit used for induction cooker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120261386 CN202177471U (en) | 2011-07-22 | 2011-07-22 | IGBT temperature measuring circuit used for induction cooker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202177471U true CN202177471U (en) | 2012-03-28 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201120261386 Expired - Lifetime CN202177471U (en) | 2011-07-22 | 2011-07-22 | IGBT temperature measuring circuit used for induction cooker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202177471U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105490253A (en) * | 2014-10-10 | 2016-04-13 | 佛山市顺德区美的电热电器制造有限公司 | Electromagnetic heating system, over-temperature protection method and device for power device of electromagnetic heating system |
| CN109100042A (en) * | 2018-09-28 | 2018-12-28 | 珠海格力电器股份有限公司 | A kind of circuit of temperature sensing circuit and detection IGBT component temperature |
| CN110829733A (en) * | 2019-10-24 | 2020-02-21 | 珠海凯邦电机制造有限公司 | Control panel, motor and air conditioning system |
| CN112710407A (en) * | 2019-10-25 | 2021-04-27 | 佛山市顺德区美的电热电器制造有限公司 | Electromagnetic heating appliance and temperature measuring device and temperature measuring method thereof |
-
2011
- 2011-07-22 CN CN 201120261386 patent/CN202177471U/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105490253A (en) * | 2014-10-10 | 2016-04-13 | 佛山市顺德区美的电热电器制造有限公司 | Electromagnetic heating system, over-temperature protection method and device for power device of electromagnetic heating system |
| CN105490253B (en) * | 2014-10-10 | 2018-06-08 | 佛山市顺德区美的电热电器制造有限公司 | The excess temperature protection method of electromagnetic heating system and its power device, device |
| CN109100042A (en) * | 2018-09-28 | 2018-12-28 | 珠海格力电器股份有限公司 | A kind of circuit of temperature sensing circuit and detection IGBT component temperature |
| CN110829733A (en) * | 2019-10-24 | 2020-02-21 | 珠海凯邦电机制造有限公司 | Control panel, motor and air conditioning system |
| CN110829733B (en) * | 2019-10-24 | 2022-02-01 | 珠海凯邦电机制造有限公司 | Control panel, motor and air conditioning system |
| CN112710407A (en) * | 2019-10-25 | 2021-04-27 | 佛山市顺德区美的电热电器制造有限公司 | Electromagnetic heating appliance and temperature measuring device and temperature measuring method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: SHENZHEN XINHUI TECHNOLOGY CO., LTD. Free format text: FORMER NAME: SHENZHEN CHK ELECTRONICS CO., LTD. |
|
| CP01 | Change in the name or title of a patent holder |
Address after: Post office building Baoan District 13 Baomin Shenzhen city Guangdong province 518101 Road 27 layer Patentee after: Xin Huike limited company of Shenzhen Address before: Post office building Baoan District 13 Baomin Shenzhen city Guangdong province 518101 Road 27 layer Patentee before: Shenzhen CHK Electronics Co., Ltd. |
|
| CX01 | Expiry of patent term |
Granted publication date: 20120328 |
|
| CX01 | Expiry of patent term |