CN202679686U - Voltage sampling and surge protection circuit of electromagnetic stove - Google Patents
Voltage sampling and surge protection circuit of electromagnetic stove Download PDFInfo
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- CN202679686U CN202679686U CN 201220204275 CN201220204275U CN202679686U CN 202679686 U CN202679686 U CN 202679686U CN 201220204275 CN201220204275 CN 201220204275 CN 201220204275 U CN201220204275 U CN 201220204275U CN 202679686 U CN202679686 U CN 202679686U
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- 238000005070 sampling Methods 0.000 title claims abstract description 59
- 239000003990 capacitor Substances 0.000 claims abstract description 17
- 238000001514 detection method Methods 0.000 claims abstract description 8
- 238000010586 diagram Methods 0.000 description 5
- 238000001914 filtration Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 238000004806 packaging method and process Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000005538 encapsulation Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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- 238000012544 monitoring process Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
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Abstract
The utility model discloses a voltage sampling and surge protection circuit of an electromagnetic stove. The voltage sampling and surge protection circuit comprises a rectification module, a surge detection module, and a single-chip microcomputer MCU, wherein the surge detection module comprises a voltage comparator, and an output end of the voltage comparator is connected with the single-chip microcomputer MCU. The voltage sampling and surge protection circuit is characterized by comprising a signal sampling module connected with the rectification module, wherein the signal sampling module comprises a speeding capacitor C1, a divider resistor R2, a divider resistor R3 and a filter capacitor C2, a signal sampling end is arranged on the connection part of the divider resistor R2 and divider resistor R3, the input end of the voltage comparator is connected with the signal sampling end by a surge sampling branch, and an input port of the single-chip microcomputer MCU is connected with the signal sampling end by the voltage sampling branch. The parallel connection between sampling and surge is avoided, thus the power consumption and the standby power consumption are reduced.
Description
Technical field
The utility model relates to voltage sample and the surge protection circuit in kitchen appliance field, particularly a kind of electromagnetic oven.
Background technology
Voltage sample circuit and voltage surge circuit are obtained after by rectification from civil power respectively in the electromagnetic oven of prior art, and introduce two parts from direct in parallel use of high pressure.For example; the voltage and current surge protection circuit that existing a kind of electromagnetic oven is used; wherein be provided with voltage surge testing circuit, current surge testing circuit; access respectively again two voltage comparators; the voltage signal that draws is accessed a logic sum gate again, again this digital logic signal is sent into the in addition pulse output of an IGBT control module.Usually, voltage surge circuit and voltage sample circuit are located at the rectification circuit front end and are drawn from the zero line circuit, and are respectively equipped with voltage surge mouth and voltage sampling mouth, and this scheme causes standby energy consumption higher.And because the working power of electromagnetic oven is introduced from the civil power high pressure, resistance is had relatively high expectations, cost is higher, so need to solve this defective.
Summary of the invention
The technical problems to be solved in the utility model is to overcome above-mentioned problems of the prior art, proposes a kind of voltage sample and surge protection circuit of electromagnetic oven.
In order to solve the problems of the technologies described above; a kind of voltage sample and surge protection circuit of electromagnetic oven are provided; comprise rectification module; surge detection module and single-chip microprocessor MCU; the surge detection module comprises voltage comparator; the output of voltage comparator is connected with single-chip microprocessor MCU; it is characterized in that: described voltage sample and surge protection circuit also comprise the signal sampling module that is connected with rectification module; the signal sampling module comprises speed-up capacitor C1; divider resistance R2; divider resistance R3 and filter capacitor C2; junction between divider resistance R2 and the divider resistance R3 is provided with the signal sampling end; the input of voltage comparator is connected with the signal sampling end through surge sampling branch road, and the input port of single-chip microprocessor MCU is connected with the signal sampling end through the voltage sample branch road.
Further, the signal sampling module is connected in the output of rectification circuit.
Further, the signal sampling module is connected in the mains current input end of rectification circuit.
Further, the voltage sample branch road is provided with gate-controlled switch.
Further, the voltage sample branch road comprises filter resistance R4 and filter capacitor C3.
Further, described voltage comparator is integrated in MCU inside, and is connected with the signal sampling end by an I/O mouth.
Further, the rectification module output is connected with filter circuit.
Because the utility model electromagnetic oven is only obtained signal with one the road from the civil power high pressure, carries out voltage surge and voltage sampling, so compared with prior art have following beneficial effect:
This programme adopts one road signal of obtaining from high pressure, has avoided voltage sampling and surge two-way in parallel, thereby has reduced work power consumption and stand-by power consumption.Simultaneously owing to only have one road signal of obtaining from high pressure, cost and the noise of having avoided the many devices of multichannel to increase; If A/D sample tap and voltage comparator are integrated in MCU inside, also can reduce by a leads ends, save the MCU packaging cost; By saving device and encapsulation, reduced the pcb board size, reduced cost; Realized that voltage surge signal and voltage sampling signal are multiplexing, avoided increasing stand-by power consumption and power consumption, saved element; By integrated comparator and A/D sample tap, reduce packaging cost and encapsulated space simultaneously, realized the product miniaturization.
Description of drawings
The utility model is described in further detail below in conjunction with accompanying drawing:
Fig. 1 is the circuit diagram of embodiment one of the present utility model;
Fig. 2 is the circuit diagram of embodiment two of the present utility model;
Fig. 3 is the circuit diagram of embodiment three of the present utility model;
Fig. 4 is the circuit diagram of embodiment four of the present utility model;
Fig. 5 is the circuit diagram of embodiment five of the present utility model.
The main element label:
The input 11 of protective tube 1, signal sampling module, reference voltage circuit 12, rectification circuit 2, signal sampling end 21, filter circuit 3, speed-up capacitor C1, main resonant circuit 4, divider resistance R1, MCU5, divider resistance R2, comparator 6, divider resistance R3, voltage sampling circuit 7, filter capacitor C2, IGBT control circuit 8, IGBT circuit 9, filter resistance R4, gate-controlled switch 31, filter capacitor C3, gate-controlled switch 32.
Embodiment
Embodiment one:
A kind of embodiment of the utility model as shown in Figure 1; a kind of voltage sample of electromagnetic oven and surge protection circuit; electromagnetic oven comprises civil power live wire L and the zero line N of temperature safety tube 1 and input rectification circuit 2; filter circuit 3 and main resonant circuit 4; voltage sample and surge protection circuit comprise rectification module 2; surge detection module and single-chip microprocessor MCU 5; the surge detection module comprises voltage comparator 6; the output of voltage comparator 6 is connected with single-chip microprocessor MCU; described voltage sample and surge protection circuit also comprise the signal sampling module 10 that is connected with rectification module 2; the signal sampling module comprises speed-up capacitor C1; divider resistance R2; divider resistance R3 and filter capacitor C2; junction between divider resistance R2 and the divider resistance R3 is provided with signal sampling end 21; the input of voltage comparator is connected with signal sampling end 21 through surge sampling branch road, and the input port of single-chip microprocessor MCU is connected with signal sampling end 21 through voltage sample branch road 7.
Main resonant circuit 4 is provided with IGBT circuit 9 and is electrically connected to the IGBT control circuit 8 of MCU 5.The C utmost point of IGBT circuit 9 is connected with resonant capacitance with heater coil, and is controlled by an IGBT control circuit 8, the operation that MCU 5 realizes control circuit 8.
Wherein, signal sampling end 21 is that voltage sample branch road 7 comprises filter resistance R4 and filter capacitor C3 by voltage sample branch road 7 access MCU 5, the output access MCU 5 of voltage comparator 6.MCU 5 carries out permanent power control after filtering and software processing.The input of signal sampling module 10 is connected with the circuit of rectification circuit 2 outputs, realize the input of voltage sampling and surge voltage signal, through speed-up capacitor C1, divider resistance R1 is connected with R2 and is connected with the input of comparator 6, and be connected to MCU5 at this signal sampling end 21, realize the sampling of 5 pairs of voltages of MCU, carry out permanent power control after processing through filtering.
Embodiment two:
As shown in Figure 2; be connected to comparator 6 such as embodiment one described signal sampling end 21; voltage sample branch road 7 is connected directly to MCU 5 by electric wire, and the middle fracture of the output access MCU 5 of voltage comparator 6 carries out the Real-Time Monitoring protection, processes by software filtering and carries out permanent power control.
Embodiment three:
As shown in Figure 3, it is with the difference of implementing embodiment one: the input of described voltage comparator 6 and voltage sample branch road 7 are all to be integrated in MCU 5 inside, be electrically connected by an I/O mouth and voltage and signal sampling end 21, voltage sample branch road 7 is provided with gate-controlled switch 31,32.
Embodiment four:
As shown in Figure 4; difference such as embodiment one is: described voltage comparator 6 is to be integrated in MCU 5 inside; and be connected with signal sampling end 21 by an I/O mouth; wherein voltage comparator 6 inputs are connected to the I/O mouth to carry out the voltage surge protection, and MCU 5 carries out permanent power control after filtering and software processing.
Embodiment five:
As shown in Figure 5, be with the difference of embodiment one: the input 11 of signal sampling module is from the rectifier bridge input sampling, and carries out rectification by diode.
According to principle of the present utility model, voltage sample in the scheme and surge protection circuit are improved or the variation that is equal to all should drop on the desired scope of claim of the present utility model.Will be appreciated that, above embodiment illustrates the utility model, and be not to be used as restriction of the present utility model, as long as in connotation scope of the present utility model, all will drop in claims scope of the present utility model variation, the modification of above embodiment.
Claims (7)
1. the voltage sample of an electromagnetic oven and surge protection circuit; comprise rectification module (2); surge detection module and single-chip microprocessor MCU (5); the surge detection module comprises voltage comparator (6); the output of voltage comparator (6) is connected with single-chip microprocessor MCU; it is characterized in that: described voltage sample and surge protection circuit also comprise the signal sampling module (10) that is connected with rectification module (2); the signal sampling module comprises speed-up capacitor C1; divider resistance R2; divider resistance R3 and filter capacitor C2; junction between divider resistance R2 and the divider resistance R3 is provided with signal sampling end (21); the input of voltage comparator is connected with signal sampling end (21) through surge sampling branch road, and the input port of single-chip microprocessor MCU is connected with signal sampling end (21) through voltage sample branch road (7).
2. the voltage sample of electromagnetic oven according to claim 1 and surge protection circuit, it is characterized in that: described signal sampling module (10) is connected in the output of rectification circuit (2).
3. the voltage sample of electromagnetic oven according to claim 1 and surge protection circuit, it is characterized in that: described signal sampling module (10) is connected in the mains current input end of rectification circuit (2).
4. according to claim 1-3 voltage sample of each described electromagnetic oven and surge protection circuit, it is characterized in that: described voltage sample branch road (7) is provided with gate-controlled switch.
5. according to claim 1-3 voltage sample of each described electromagnetic oven and surge protection circuit, it is characterized in that: described voltage sample branch road (7) comprises filter resistance R4 and filter capacitor C3.
6. according to claim 1-3 voltage sample of each described electromagnetic oven and surge protection circuit, it is characterized in that: described voltage comparator (6) is integrated in MCU(5) inside, and be connected with signal sampling end (21) by an I/O mouth.
7. the voltage sample of electromagnetic oven according to claim 1 and surge protection circuit, it is characterized in that: described rectification module (2) output is connected with filter circuit (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220204275 CN202679686U (en) | 2012-05-09 | 2012-05-09 | Voltage sampling and surge protection circuit of electromagnetic stove |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220204275 CN202679686U (en) | 2012-05-09 | 2012-05-09 | Voltage sampling and surge protection circuit of electromagnetic stove |
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| Publication Number | Publication Date |
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| CN202679686U true CN202679686U (en) | 2013-01-16 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201220204275 Expired - Lifetime CN202679686U (en) | 2012-05-09 | 2012-05-09 | Voltage sampling and surge protection circuit of electromagnetic stove |
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| CN (1) | CN202679686U (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103236801A (en) * | 2013-04-07 | 2013-08-07 | 广东鼎燊科技有限公司 | Surge impact device for detecting induction cooker |
| CN105305784A (en) * | 2015-12-01 | 2016-02-03 | 珠海格力电器股份有限公司 | Surge protection method and circuit, IGBT (Insulated Gate Bipolar Translator) circuit and heater |
| WO2016123897A1 (en) * | 2015-02-02 | 2016-08-11 | 佛山市顺德区美的电热电器制造有限公司 | Electromagnetic heating control circuit and electromagnetic heating device |
| CN105990824A (en) * | 2015-02-02 | 2016-10-05 | 佛山市顺德区美的电热电器制造有限公司 | Surge protection circuit |
| CN108988291A (en) * | 2017-06-05 | 2018-12-11 | 佛山市顺德区美的电热电器制造有限公司 | Household electrical appliance and surge protective device for household electrical appliance |
| CN113687133A (en) * | 2021-08-19 | 2021-11-23 | 华为技术有限公司 | Surge detection circuit and detection device for active protection |
-
2012
- 2012-05-09 CN CN 201220204275 patent/CN202679686U/en not_active Expired - Lifetime
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103236801A (en) * | 2013-04-07 | 2013-08-07 | 广东鼎燊科技有限公司 | Surge impact device for detecting induction cooker |
| CN103236801B (en) * | 2013-04-07 | 2015-09-02 | 广东鼎燊科技有限公司 | A kind of surge impact device detecting electromagnetic oven |
| WO2016123897A1 (en) * | 2015-02-02 | 2016-08-11 | 佛山市顺德区美的电热电器制造有限公司 | Electromagnetic heating control circuit and electromagnetic heating device |
| CN105990824A (en) * | 2015-02-02 | 2016-10-05 | 佛山市顺德区美的电热电器制造有限公司 | Surge protection circuit |
| CN105990824B (en) * | 2015-02-02 | 2018-10-02 | 佛山市顺德区美的电热电器制造有限公司 | Surge protection circuit |
| US10638551B2 (en) | 2015-02-02 | 2020-04-28 | Foshan Shunde Midea Electrical Heating Appliances Manufacturing Co., Ltd | Electromagnetic heating control circuit and electromagnetic heating device |
| CN105305784A (en) * | 2015-12-01 | 2016-02-03 | 珠海格力电器股份有限公司 | Surge protection method and circuit, IGBT (Insulated Gate Bipolar Translator) circuit and heater |
| CN105305784B (en) * | 2015-12-01 | 2018-05-01 | 珠海格力电器股份有限公司 | A kind of surge protection method and circuit, IGBT circuits and heater |
| CN108988291A (en) * | 2017-06-05 | 2018-12-11 | 佛山市顺德区美的电热电器制造有限公司 | Household electrical appliance and surge protective device for household electrical appliance |
| CN113687133A (en) * | 2021-08-19 | 2021-11-23 | 华为技术有限公司 | Surge detection circuit and detection device for active protection |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP02 | Change in the address of a patent holder |
Address after: 250118 999 Mei Li Road, Huaiyin District, Ji'nan, Shandong Patentee after: Joyoung Company Limited Address before: Xinsha Road, Huaiyin District of Ji'nan city of Shandong Province, No. 12 250118 Patentee before: Joyoung Company Limited |
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| CP02 | Change in the address of a patent holder | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130116 |
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| CX01 | Expiry of patent term |