CN205726492U - A kind of Electromagnetic Heating soft start structure - Google Patents
A kind of Electromagnetic Heating soft start structure Download PDFInfo
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- CN205726492U CN205726492U CN201620269469.XU CN201620269469U CN205726492U CN 205726492 U CN205726492 U CN 205726492U CN 201620269469 U CN201620269469 U CN 201620269469U CN 205726492 U CN205726492 U CN 205726492U
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- 238000010438 heat treatment Methods 0.000 title claims abstract description 26
- 238000001514 detection method Methods 0.000 claims abstract description 19
- 238000000034 method Methods 0.000 claims abstract description 8
- 238000006243 chemical reaction Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 240000007594 Oryza sativa Species 0.000 description 1
- 235000007164 Oryza sativa Nutrition 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010411 cooking Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 235000013305 food Nutrition 0.000 description 1
- 235000009566 rice Nutrition 0.000 description 1
Abstract
The utility model discloses a kind of Electromagnetic Heating soft start structure, including LC oscillating circuit, IGBT/MOSFET drive circuit, synchronization hardware circuit, single-chip microcomputer, zero cross detection circuit, described synchronization hardware circuit is connected with described single-chip microcomputer, and described single-chip microcomputer processes synchronizing signal and obtains synchronization pulse；Described single-chip microcomputer is connected with described IGBT/MOSFET drive circuit, described IGBT/MOSFET drive circuit is given by described single-chip microcomputer output switch control signal, control described IGBT/MOSFET level high and low, described single-chip microcomputer detects zero cross detection circuit in real time, and judge zero crossing, the zero crossing detected further according to described zero cross detection circuit, sends a signal to described single-chip microcomputer, and described single-chip microcomputer can open soft start at zero crossing every time.This utility model uses single-chip microcomputer to gather electrical network zero cross signal, single-chip microcomputer is opened soft start according to system heating state from zero crossing and is heated, start soft start routine and can effectively reduce the noise that Electromagnetic Heating produces, reach the acceptable purpose of noise, promote client's user satisfaction.
Description
Technical field
This utility model relates to household electrical appliance technical field, is specifically related to a kind of Electromagnetic Heating soft start structure.
Background technology
Rice cooker cooking food heats sometimes for little firepower, but typically use intermittent-heating i.e. heat some seconds close some seconds realize little firepower heating, this mode theoretically realizes the heating of little firepower, but culinary art effect is bad, use fast intermittent heating i.e. heating 10ms to close 10ms on this basis to realize, although solving continuous low power heating, bring noise problem therewith.
Utility model content
For the problems referred to above, this utility model aims to provide a kind of Electromagnetic Heating soft start structure.The present invention can effectively reduce the noise that Electromagnetic Heating produces, and promotes client's user satisfaction.
For realizing this technical purpose, scheme of the present utility model is: a kind of Electromagnetic Heating soft start structure, including LC oscillating circuit, IGBT/MOSFET drive circuit, synchronization hardware circuit, single-chip microcomputer, zero cross detection circuit, described synchronization hardware circuit is connected with described single-chip microcomputer, and described single-chip microcomputer processes synchronizing signal and obtains synchronization pulse；Described single-chip microcomputer is connected with described IGBT/MOSFET drive circuit, described IGBT/MOSFET drive circuit is given by described single-chip microcomputer output switch control signal, control described IGBT/MOSFET level high and low, described single-chip microcomputer detects zero cross detection circuit in real time, and judge zero crossing, the zero crossing detected further according to described zero cross detection circuit, sends a signal to described single-chip microcomputer, and described single-chip microcomputer can open soft start at zero crossing every time.Open soft start at zero crossing and reduce Electromagnetic Heating startup noise problem.
As preferably, described single-chip microcomputer triggers described IGBT/MOSFET drive circuit conducting width, and it is open-minded that described single-chip microcomputer triggers PPG according to synchronization pulse.
The Starting mode of a kind of Electromagnetic Heating soft start, comprises the following steps:
1) described zero cross detection circuit detection zero cross signal, detects that zero cross signal enters next step after feeding back to described single-chip microcomputer；
2) single is opened fixing PPG and is driven width, again opens fixing PPG and drives width, dry time of circulation promise, enter next step at back-pressure minimum point；
3) normal mode, step such as " PPG/MOSFET drive circuit " are started；Wherein enter described PPG/MOSFET drive circuit to comprise the following steps:
A) described synchronization hardware circuit is connected to the switching device formation voltage branch circuit of electromagnetic oven energy conversion drum and described IGBT/MOSFET drive circuit, and described single-chip microcomputer processes according to bleeder circuit and obtains synchronization pulse；
B) described single-chip microcomputer is open-minded by synchronization pulse triggering PPG according to the width of the size calculating described IGBT/MOSFET drive circuit of conducting of power；
C) single-chip microcomputer is automatically switched off the output of PPG signal according to IGBT/MOSFET ON time after terminating；
D) step 1 is returned), wait the upset of synchronization hardware circuit signal.
The beneficial effects of the utility model:
This utility model uses single-chip microcomputer to gather electrical network zero cross signal, single-chip microcomputer is opened soft start according to system heating state from zero crossing and is heated, start soft start routine and can effectively reduce the noise that Electromagnetic Heating produces, reach the acceptable purpose of noise, promote client's user satisfaction.
Accompanying drawing explanation
Fig. 1 is circuit structure schematic diagram of the present utility model；
Fig. 2 is zero cross detection circuit detection waveform schematic diagram of the present utility model；
Fig. 3 is PPG signal waveform schematic diagram of the present utility model.
Detailed description of the invention
With specific embodiment, this utility model is described in further details below in conjunction with the accompanying drawings.
As shown in Figure 1, a kind of Electromagnetic Heating soft start structure of optimal specific embodiment of the present utility model, including LC oscillating circuit, IGBT/MOSFET drive circuit, synchronization hardware circuit, single-chip microcomputer, zero cross detection circuit, described synchronization hardware circuit is connected with described single-chip microcomputer, and described single-chip microcomputer processes synchronizing signal and obtains synchronization pulse；Described single-chip microcomputer is connected with described IGBT/MOSFET drive circuit, described IGBT/MOSFET drive circuit is given by described single-chip microcomputer output switch control signal, control described IGBT/MOSFET level high and low, described single-chip microcomputer detects zero cross detection circuit in real time, and judge zero crossing, the zero crossing detected further according to described zero cross detection circuit, sends a signal to described single-chip microcomputer, and described single-chip microcomputer can open soft start at zero crossing every time.Open soft start at zero crossing and reduce Electromagnetic Heating startup noise problem.
As preferably, described single-chip microcomputer triggers described IGBT/MOSFET drive circuit conducting width, and it is open-minded that described single-chip microcomputer triggers PPG according to synchronization pulse.
The Starting mode of a kind of Electromagnetic Heating soft start, comprises the following steps:
1) described zero cross detection circuit detection zero cross signal, detects that zero cross signal enters next step after feeding back to described single-chip microcomputer；
2) single is opened fixing PPG and is driven width, again opens fixing PPG and drives width, dry time of circulation promise, enter next step at back-pressure minimum point；
3) normal mode, step such as " PPG/MOSFET drive circuit " are started；Wherein enter described PPG/MOSFET drive circuit to comprise the following steps:
A) described synchronization hardware circuit is connected to the switching device formation voltage branch circuit of electromagnetic oven energy conversion drum and described IGBT/MOSFET drive circuit, and described single-chip microcomputer processes according to bleeder circuit and obtains synchronization pulse；
B) described single-chip microcomputer is open-minded by synchronization pulse triggering PPG according to the width of the size calculating described IGBT/MOSFET drive circuit of conducting of power；
C) single-chip microcomputer is automatically switched off the output of PPG signal according to IGBT/MOSFET ON time after terminating；
D) step 1 is returned), wait the upset of synchronization hardware circuit signal.
The specific works collective step of this utility model is as follows:
1, single-chip microcomputer detection zero cross signal, detects that zero cross signal enters next step, and zero cross signal is as shown in Figure 2；
2, single is opened fixing PPG and is driven width, again opens fixing PPG and drives width, dry time of circulation promise, enter next step at back-pressure minimum point, and soft start is as shown in Fig. 3 soft-start mode；
3, synchronization hardware circuit is connected to electromagnetic oven energy conversion drum and IGBT/MOSFET switching device forms voltage branch circuit, and single-chip microcomputer processes according to bleeder circuit and obtains synchronization pulse；
4, single-chip microcomputer is open-minded by synchronization pulse triggering PPG according to the width of the size calculating conducting IGBT/MOSFET of power；
5, single-chip microcomputer is automatically switched off the output of PPG signal according to IGBT/MOSFET ON time after terminating；
6, step 3 is returned), wait the upset of synchronization hardware circuit signal, work process is as shown in Fig. 3 normal mode.
The designing points of technical solutions of the utility model is to use single-chip microcomputer to gather electrical network zero cross signal, single-chip microcomputer is opened soft start according to system heating state from zero crossing and is heated, start soft start routine and can effectively reduce the noise that Electromagnetic Heating produces, reach the acceptable purpose of noise, promote client's user satisfaction.
The above; it is only preferred embodiment of the present utility model; not in order to limit this utility model, every any trickle amendment, equivalent and improvement made above example according to technical spirit of the present utility model, within should be included in the protection domain of technical solutions of the utility model.
Claims (2)
1. an Electromagnetic Heating soft start structure, it is characterized in that: include LC oscillating circuit, IGBT/MOSFET drive circuit, synchronization hardware circuit, single-chip microcomputer, zero cross detection circuit, described synchronization hardware circuit is connected with described single-chip microcomputer, and described single-chip microcomputer processes synchronizing signal and obtains synchronization pulse；Described single-chip microcomputer is connected with described IGBT/MOSFET drive circuit, described IGBT/MOSFET drive circuit is given by described single-chip microcomputer output switch control signal, control described IGBT/MOSFET level high and low, described single-chip microcomputer detects zero cross detection circuit in real time, and judge zero crossing, the zero crossing detected further according to described zero cross detection circuit, sends a signal to described single-chip microcomputer, and described single-chip microcomputer can open soft start at zero crossing every time.
Electromagnetic Heating soft start structure the most according to claim 1, it is characterised in that: described single-chip microcomputer triggers described IGBT/MOSFET drive circuit conducting width, and it is open-minded that described single-chip microcomputer triggers PPG according to synchronization pulse.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620269469.XU CN205726492U (en) | 2016-03-31 | 2016-03-31 | A kind of Electromagnetic Heating soft start structure |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620269469.XU CN205726492U (en) | 2016-03-31 | 2016-03-31 | A kind of Electromagnetic Heating soft start structure |
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| CN205726492U true CN205726492U (en) | 2016-11-23 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201620269469.XU Expired - Fee Related CN205726492U (en) | 2016-03-31 | 2016-03-31 | A kind of Electromagnetic Heating soft start structure |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108668394A (en) * | 2017-03-31 | 2018-10-16 | 佛山市顺德区美的电热电器制造有限公司 | The starter of electromagnetic heating system and its power switch tube and startup method |
-
2016
- 2016-03-31 CN CN201620269469.XU patent/CN205726492U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108668394A (en) * | 2017-03-31 | 2018-10-16 | 佛山市顺德区美的电热电器制造有限公司 | The starter of electromagnetic heating system and its power switch tube and startup method |
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| GR01 | Patent grant | ||
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Address after: 311228 Linjiang Industrial Park, Xiaoshan District, Zhejiang, 2977, No. six, Hangzhou Patentee after: Hangzhou Xinda Intelligent Technology Co.,Ltd. Address before: 311228 Linjiang Industrial Park, Xiaoshan District, Zhejiang, 2977, No. six, Hangzhou Patentee before: HANGZHOU SINODOD ELECTRIC Co.,Ltd. |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20161123 |