CN101936555B - Detection device and detection method for phase-shifted full-bridge hard switch of high-power induction cooker - Google Patents
Detection device and detection method for phase-shifted full-bridge hard switch of high-power induction cooker Download PDFInfo
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- CN101936555B CN101936555B CN2010102850708A CN201010285070A CN101936555B CN 101936555 B CN101936555 B CN 101936555B CN 2010102850708 A CN2010102850708 A CN 2010102850708A CN 201010285070 A CN201010285070 A CN 201010285070A CN 101936555 B CN101936555 B CN 101936555B
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- 230000006698 induction Effects 0.000 title abstract 2
- 238000005070 sampling Methods 0.000 claims abstract description 54
- 239000000523 sample Substances 0.000 claims abstract description 47
- 238000009434 installation Methods 0.000 claims description 4
- 239000003990 capacitor Substances 0.000 description 10
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 208000033999 Device damage Diseases 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000008447 perception Effects 0.000 description 1
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Abstract
The invention discloses a detection device of a phase-shifted full-bridge hard switch of an induction cooker, which comprises a phase-shifted full-bridge circuit, a logic drive circuit, a microcontroller, a first temperature sampling circuit, a second temperature sampling circuit, a first temperature sensing probe, a second temperature sensing probe and a power supply circuit, wherein the phase-shifted full-bridge circuit, the logic drive circuit, the microcontroller, the first temperature sampling circuit, the second temperature sampling circuit, the first temperature sensing probe, the second temperature sensing probe and the power supply circuit are arranged on the surface of a machine core radiator. The detection method comprises the following steps: 1. setting a reference value Tset; 2. the microcontroller reads a temperature sampling value AD1 of a lagging bridge arm in the phase-shifted full-bridge circuit through the first temperature sampling circuit; reading a temperature sampling value AD0 of an advance bridge arm in the phase-shifted full-bridge circuit through a second temperature sampling circuit; 3. the microcontroller judges whether the difference value of the temperature sampling value AD1 of the lagging bridge arm and the temperature sampling value AD0 of the leading bridge arm is larger than a reference value Tset or not; if not, returning to the main program, and if not, switching off the lag bridge arm and the lead bridge arm through the logic drive circuit. The invention can effectively protect the lagging bridge arm.
Description
Technical field
The present invention is a kind of checkout gear and detection method thereof of phase-shifting full-bridge hard switching, particularly a kind of checkout gear and detection method thereof of high-power electromagnetic oven phase-shifting full-bridge hard switching.
Background technology
Electromagnetic oven phase-shifting full-bridge on-off circuit comprises lagging leg and the leading-bridge of being made up of switching device IGBT, under normal operation such as load such as coil panel, resonant capacitance, its waveform as shown in Figure 1, the voltage-phase II is ahead of the current phase I, leading-bridge IGBT is that no-voltage is open-minded, and lagging leg IGBT is a zero current turning-on.Leading-bridge IGBT and lagging leg IGBT switching loss are basic identical, and the temperature difference is very little.
When load occurs when unusual such as the coil disc of electric stove water inlet causes turn-to-turn short circuit etc., the coil panel inductance sharply diminishes, and the duty of circuit can enter the capacitive district by the perception district.Waveform under this non-normal working situation as shown in Figure 2, the voltage-phase II lags behind the current phase I, leading-bridge IGBT still is that no-voltage is open-minded, lagging leg IGBT is a non-zero current hard switching opening state.Lagging leg IGBT temperature sharply rises, and under the constant situation of leading-bridge IGBT loss, it is very big that the two temperature difference becomes.If do not protect, will cause the damage of lagging leg IGBT.
Summary of the invention
The objective of the invention is to consider the problems referred to above and a kind of checkout gear and the detection method that can effectively avoid the high-power electromagnetic oven phase-shifting full-bridge hard switching that phase-shifting full-bridge lagging leg switching device damages be provided.
Technical scheme of the present invention is: a kind of checkout gear of high-power electromagnetic oven phase-shifting full-bridge hard switching, comprise the phase whole-bridging circuit that is installed on electromagnetic oven movement spreader surface, logic drive circuit, microcontroller, first temperature sampling circuit, second temperature sampling circuit, first temperature-sensing probe, second temperature-sensing probe and power circuit, wherein the input of power circuit is electrically connected with the city, output respectively with logic drive circuit, microcontroller, first temperature sampling circuit, second temperature sampling circuit connects, first temperature-sensing probe is connected with the input of first temperature sampling circuit with second temperature sampling circuit respectively with second temperature-sensing probe, the output of first temperature sampling circuit and second temperature sampling circuit is connected with the input of microcontroller, the output of microcontroller is connected with the input of logic drive circuit, the output of logic drive circuit is connected with the input of phase whole-bridging circuit, phase whole-bridging circuit comprises lagging leg and leading-bridge, it is characterized in that described first temperature-sensing probe and second temperature-sensing probe are installed in the installation region of phase whole-bridging circuit of movement spreader surface.
Further, described first temperature-sensing probe and second temperature-sensing probe are installed in the zone between the lagging leg and leading-bridge in the phase whole-bridging circuit.
Further, the distance of described first temperature-sensing probe and lagging leg equals the distance between second temperature-sensing probe and the leading-bridge, and the two is on the same horizontal line.
Described first temperature-sensing probe and second temperature-sensing probe are thermistor or thermocouple.
A kind of detection method of checkout gear of power electromagnet stove phase-shifting full-bridge hard switching is characterized in that may further comprise the steps:
(1) a reference value Tset is set;
(2) described microcontroller reads the temperature sampling value AD1 of lagging leg in the phase whole-bridging circuit by first temperature sampling circuit; Read the temperature sampling value AD0 of leading-bridge in the phase whole-bridging circuit by second temperature sampling circuit;
(3) described microcontroller judges that whether the difference of temperature sampling value AD0 of the temperature sampling value AD1 of lagging leg and leading-bridge is greater than a reference value Tset; Be not more than and then return main program, greater than then turn-offing lagging leg and leading-bridge by logic drive circuit.
The present invention since first temperature-sensing probe and second temperature-sensing probe be installed in the installation region of phase whole-bridging circuit of electromagnetic oven movement spreader surface; when load occurs when unusual; can read the temperature difference of lagging leg and leading-bridge by microcontroller; and judge whether lagging leg hard switching takes place; and temperature difference acquires a certain degree and just forces to turn-off lagging leg and leading-bridge by logic circuit, thereby lagging leg is effectively protected.
Description of drawings
Fig. 1 is the oscillogram under the existing high-power electromagnetic oven phase-shifting full-bridge on-off circuit normal operating conditions;
Fig. 2 is the oscillogram under the existing high-power electromagnetic oven phase-shifting full-bridge on-off circuit abnormal operating state;
Fig. 3 circuit block diagram of the present invention;
The structural representation that Fig. 4 installs for temperature-sensing probe of the present invention;
Fig. 5 is the flow chart of phase-shifting full-bridge lagging leg hard switching detection method of the present invention;
Fig. 6 is the circuit theory diagrams of the embodiment of the invention;
Fig. 7 is the power circuit principle figure of the embodiment of the invention.
The specific embodiment
The present invention is further described below in conjunction with embodiment and accompanying drawing.
As shown in Figure 3, the checkout gear of high-power electromagnetic oven phase-shifting full-bridge hard switching of the present invention, comprise the phase whole-bridging circuit 1 that is installed on electromagnetic oven movement radiator 7 surfaces, logic drive circuit 2, microcontroller 3, first temperature sampling circuit 41, second temperature sampling circuit 42, first temperature-sensing probe 51, second temperature-sensing probe 52 and power circuit 6, wherein the input of power circuit 6 is electrically connected with the city, output respectively with logic drive circuit 2, microcontroller 3, first temperature sampling circuit 41, second temperature sampling circuit 42 connects, first temperature-sensing probe 51 is connected with the input of first temperature sampling circuit 41 and second temperature sampling circuit 42 respectively with second temperature-sensing probe 52, the output of first temperature sampling circuit 41 and second temperature sampling circuit 42 is connected with the input of microcontroller 3, the output of microcontroller 3 is connected with the input of logic drive circuit 2, the output of logic drive circuit 2 is connected with the input of phase whole-bridging circuit 1, and described first temperature-sensing probe 51 and second temperature-sensing probe 52 are installed in the installation region of phase whole-bridging circuit 1 on electromagnetic oven movement radiator 7 surfaces.
As shown in Figure 4, first temperature-sensing probe 51 and second temperature-sensing probe 52 are installed in the zone between the lagging leg 11 and leading-bridge 12 in the phase whole-bridging circuit 1, distance between first temperature-sensing probe 51 and the lagging leg 11 equals the distance between second temperature-sensing probe 52 and the leading-bridge 12, and the two is on the same horizontal line.
As shown in Figure 6, described phase whole-bridging circuit 1 comprises lagging leg 11, leading-bridge 12, coil panel inductance L 11, resonant capacitance C11, absorbs capacitor C 12 and absorb capacitor C 13, wherein lagging leg 11 comprises IGBT11 and IGBT12, and leading-bridge 12 comprises IGBT13 and IGBT14.The IGBT11 emitter stage connects IGBT12 colelctor electrode, coil panel inductance L 11 1 ends respectively, the other end of coil panel inductance L 11 connects resonant capacitance C11 one end, the other end of resonant capacitance C11 connects absorption capacitor C 12 respectively, absorbs capacitor C 13, IGBT13 colelctor electrode and IGBT14 emitter stage, the other end that absorbs capacitor C 12 connects IGBT11 colelctor electrode and IGBT14 colelctor electrode, and the other end that absorbs capacitor C 13 connects the emitter stage of IGBT12 and IGBT13; The IGBT11 colelctor electrode links to each other with power supply PVCC with the IGBT14 colelctor electrode, the IGBT12 emitter stage links to each other with public connecting end PGND with the IGBT13 emitter stage, corresponding respectively IGBT11-GE, IGBT12-GE, IGBT13-GE, the IGBT14-GE end that connects in the logic drive circuit 2 of the grid of IGBT11, IGBT12, IGBT13, IGBT14.
First temperature sampling circuit 41 comprises resistance R 411, resistance R 412 and capacitor C 411, resistance R 412 1 ends connect the AD1 sample port of microcontroller 3, the other end connects first temperature-sensing probe 51 and resistance R 411 1 ends respectively, resistance R 411 other ends connect public connecting end GND, capacitor C 411 1 ends connect resistance R 412 1 ends, and the other end connects public connecting end GND.
Second temperature sampling circuit 42 comprises resistance R 421, resistance R 422 and capacitor C 421, resistance R 422 1 ends connect the AD0 sample port of microcontroller 3, the other end connects second temperature-sensing probe 52 and resistance R 421 1 ends respectively, resistance R 421 other ends connect public connecting end GND, capacitor C 421 1 ends connect resistance R 422 1 ends, and the other end connects public connecting end GND.
Described first temperature-sensing probe 51 and second temperature-sensing probe 52 are all selected 1% high precision thermosensitive resistor R51 and R52 for use.
As shown in Figure 7, power circuit 6 adopts city's piezoelectric transformer of many output winding of isolating mutually, form by 24VAC1,24VAC2,24VAC3,24VAC4,15VACx2 and 8VAC, through the AC-DC modular converter export respectively 24VDC1,24VDC2,24VDC3,24VDC4, ± 12VDC and 5VDC.
As shown in Figure 5, the detection method of the checkout gear of power electromagnet stove phase-shifting full-bridge hard switching of the present invention is:
(1) a reference value Tset is set; In the present embodiment, Tset=10 ℃.
(2) described microcontroller 3 reads the temperature sampling value AD1 of lagging leg 11 in the phase whole-bridging circuit 1 by first temperature sampling circuit 41; Read the temperature sampling value AD0 of leading-bridge 12 in the phase whole-bridging circuit 1 by second temperature sampling circuit 42;
(3) described microcontroller 3 judges that whether the difference of temperature sampling value AD0 of the temperature sampling value AD1 of lagging leg 11 and leading-bridge 12 is greater than a reference value Tset; Be not more than and then return main program, greater than then turn-offing lagging leg 11 and leading-bridge 12 by logic drive circuit 2.
Claims (5)
1. the checkout gear of a high-power electromagnetic oven phase-shifting full-bridge hard switching, comprise the phase whole-bridging circuit (1) that is installed on electromagnetic oven movement radiator (7) surface, logic drive circuit (2), microcontroller (3), first temperature sampling circuit (41), second temperature sampling circuit (42), first temperature-sensing probe (51), second temperature-sensing probe (52) and power circuit (6), wherein the input of power circuit (6) is electrically connected with the city, output respectively with logic drive circuit (2), microcontroller (3), first temperature sampling circuit (41), second temperature sampling circuit (42) connects, first temperature-sensing probe (51) is connected with the input of first temperature sampling circuit (41) with second temperature sampling circuit (42) respectively with second temperature-sensing probe (52), the output of first temperature sampling circuit (41) and second temperature sampling circuit (42) is connected with the input of microcontroller (3), the output of microcontroller (3) is connected with the input of logic drive circuit (2), the output of logic drive circuit (2) is connected with the input of phase whole-bridging circuit (1), phase whole-bridging circuit (1) comprises lagging leg (11) and leading-bridge (12), it is characterized in that described first temperature-sensing probe (51) and second temperature-sensing probe (52) are installed in the installation region of the surperficial phase whole-bridging circuit (1) of electromagnetic oven movement radiator (7).
2. the checkout gear of high-power electromagnetic oven phase-shifting full-bridge hard switching according to claim 1 is characterized in that described first temperature-sensing probe (51) and second temperature-sensing probe (52) are installed in the zone between middle lagging leg (11) of phase whole-bridging circuit (1) and the leading-bridge (12).
3. the checkout gear of high-power electromagnetic oven phase-shifting full-bridge hard switching according to claim 2, the distance that it is characterized in that described first temperature-sensing probe (51) and lagging leg (11) equals the distance between second temperature-sensing probe (52) and the leading-bridge (12), and the two is on the same horizontal line.
4. according to the checkout gear of claim 1 or 2 or 3 described phase-shifting full-bridge hard switchings, it is characterized in that described first temperature-sensing probe (51) and second temperature-sensing probe (52) are thermistor or thermocouple.
5. the detection method of the checkout gear of high-power electromagnetic oven phase-shifting full-bridge hard switching according to claim 1 is characterized in that may further comprise the steps:
(1) a reference value Tset is set;
(2) described microcontroller (3) reads the temperature sampling value AD1 of lagging leg (11) in the phase whole-bridging circuit (1) by first temperature sampling circuit (41); Read the temperature sampling value AD0 of leading-bridge (12) in the phase whole-bridging circuit (1) by second temperature sampling circuit (42);
(3) described microcontroller (3) judges that whether the difference of temperature sampling value AD0 of the temperature sampling value AD1 of lagging leg (11) and leading-bridge (12) is greater than a reference value Tset; Be not more than and then return main program, greater than then turn-offing lagging leg (11) and leading-bridge (12) by logic drive circuit (four).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102850708A CN101936555B (en) | 2010-09-18 | 2010-09-18 | Detection device and detection method for phase-shifted full-bridge hard switch of high-power induction cooker |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010102850708A CN101936555B (en) | 2010-09-18 | 2010-09-18 | Detection device and detection method for phase-shifted full-bridge hard switch of high-power induction cooker |
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| Publication Number | Publication Date |
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| CN101936555A CN101936555A (en) | 2011-01-05 |
| CN101936555B true CN101936555B (en) | 2011-12-07 |
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| CN2010102850708A Expired - Fee Related CN101936555B (en) | 2010-09-18 | 2010-09-18 | Detection device and detection method for phase-shifted full-bridge hard switch of high-power induction cooker |
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| CN106533241B (en) * | 2017-01-03 | 2018-08-17 | 河南森源电气股份有限公司 | A kind of pwm signal control method of phase whole-bridging circuit IGBT |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1897426A (en) * | 2006-06-21 | 2007-01-17 | 艾默生网络能源有限公司 | Control of phase whole-bridging circuit and its control circuit |
| CN201376134Y (en) * | 2009-04-07 | 2010-01-06 | 上海沪工电焊机制造有限公司 | NC soft switch full-bridge phase-shifted welding power source of welding machine |
| CN101793928A (en) * | 2010-01-27 | 2010-08-04 | 广州电器科学研究院 | Phase-shifting full-bridge convertor real-time fault diagnosis method and system |
| CN201779723U (en) * | 2010-09-18 | 2011-03-30 | 美的集团有限公司 | Detection device for phase-shifted full-bridge hard switch of high-power induction cooker |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102004036160A1 (en) * | 2003-07-31 | 2005-02-24 | Fairchild Korea Semiconductor Ltd., Bucheon | Current converter for alternating/direct current voltages has a full bridge inverter with a source of voltage, triggered switches and a pulse width modulating unit |
| CN101599252A (en) * | 2008-06-02 | 2009-12-09 | 鸿富锦精密工业（深圳）有限公司 | Circuit of display driving |
| KR100940227B1 (en) * | 2008-07-04 | 2010-02-04 | 삼성전기주식회사 | Phase shift full bridge converter reduced current stress |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1897426A (en) * | 2006-06-21 | 2007-01-17 | 艾默生网络能源有限公司 | Control of phase whole-bridging circuit and its control circuit |
| CN201376134Y (en) * | 2009-04-07 | 2010-01-06 | 上海沪工电焊机制造有限公司 | NC soft switch full-bridge phase-shifted welding power source of welding machine |
| CN101793928A (en) * | 2010-01-27 | 2010-08-04 | 广州电器科学研究院 | Phase-shifting full-bridge convertor real-time fault diagnosis method and system |
| CN201779723U (en) * | 2010-09-18 | 2011-03-30 | 美的集团有限公司 | Detection device for phase-shifted full-bridge hard switch of high-power induction cooker |
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Owner name: GUANGDONG MIDEA KITCHEN APPLIANCE MANUFACTURING CO Free format text: FORMER OWNER: MIDEA ELECTRICAL HEATING APPLIANCES MANUFACTURING CO., LTD., SHUNDE DISTRICT, FOSHAN CITY Effective date: 20130929 |
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Effective date of registration: 20130929 Address after: 528311 Yongan Road, Beijiao Town, Guangdong District, Foshan, No. 6, No. Patentee after: GUANGDONG MIDEA KITCHEN APPLIANCES MANUFACTURING Co.,Ltd. Address before: Beijiao Town, Shunde District of Guangdong city of Foshan province Sanle road 528311 No. 19 Patentee before: FOSHAN SHUNDE MIDEA ELECTRICAL HEATING APPLIANCES MANUFACTURING Co.,Ltd. |
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