CN202261887U - Low-noise control circuit of electromagnetic oven - Google Patents
Low-noise control circuit of electromagnetic oven Download PDFInfo
- Publication number
- CN202261887U CN202261887U CN2011203133420U CN201120313342U CN202261887U CN 202261887 U CN202261887 U CN 202261887U CN 2011203133420 U CN2011203133420 U CN 2011203133420U CN 201120313342 U CN201120313342 U CN 201120313342U CN 202261887 U CN202261887 U CN 202261887U
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- control circuit
- noise control
- electromagnetic relay
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- 239000003990 capacitor Substances 0.000 claims abstract description 5
- 230000001681 protective effect Effects 0.000 claims description 16
- 230000000087 stabilizing effect Effects 0.000 claims description 4
- 230000000694 effects Effects 0.000 abstract description 8
- 238000000034 method Methods 0.000 abstract description 4
- 230000008569 process Effects 0.000 abstract description 4
- 230000008859 change Effects 0.000 abstract description 2
- 238000001914 filtration Methods 0.000 abstract 1
- 230000002035 prolonged effect Effects 0.000 abstract 1
- 239000000853 adhesive Substances 0.000 description 5
- 230000001070 adhesive effect Effects 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 3
- 230000009467 reduction Effects 0.000 description 3
- 230000003139 buffering effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 235000014676 Phragmites communis Nutrition 0.000 description 1
- 239000012814 acoustic material Substances 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000001186 cumulative effect Effects 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000013017 mechanical damping Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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- 238000012797 qualification Methods 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
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Abstract
The utility model relates to a low-noise control circuit of an electromagnetic oven. The low-noise control circuit comprises a filtering loop and a main resonant loop provided with an IGBT (insulated gate bipolar transistor), wherein an IGBT protection circuit comprises a power supply, an electromagnetic relay for controlling the conduction of the main resonant loop and a triode, the electromagnetic relay comprises a relay switch connected in the main resonant loop and a relay coil connected in series with the triode, and a polar capacitor which is connected in parallel with the relay coil is arranged in the IGBT protection circuit. The rate of change of voltage of the electromagnetic relay is reduced through the charge-discharge process of the polar capacitor, so that the buffer driving effect of the electromagnetic relay is achieved, the mutual impact force of internal mechanical contact points is reduced for realizing a denoising effect, the deformation probability of an internal spring leaf of the electromagnetic relay is simultaneously reduced and the service life of the electromagnetic relay is prolonged.
Description
Technical field
The utility model relates to the kitchen appliance field, particularly a kind of low noise control circuit of electromagnetic oven.
Background technology
In the electromagnetic oven of prior art for preventing at powered on moment; IGBT is damaged because of overcurrent; And then cause the phenomenon of electromagnetic oven generation aircraft bombing, used electromagnetic relay that IGBT is gone up electric protection, but the mechanicalness noise that electromagnetic relay produces in the course of the work become one of factor that influences the product quality level; For reaching the effect of insulating noise; Prior art mainly reaches noise reduction through following dual mode: the one, and through between the contact of inner adhesive of electromagnetic relay and relieving, adding sound arrester (like elastic composition, curable resin or other mechanical damping composition or materials),, the shortcoming of this scheme is subject to the restriction and the influence of factors such as temperature but being the acoustic material that adds; Easy phenomenon such as solidify, go bad; Operate as normal to relay itself is prone to produce the harm of losing efficacy, and cost is higher, and technology is more complicated also; The 2nd, inner at electromagnetic relay, the contact of relay adhesive and relieving is installed in the airtight glass shell, and with being evacuated or inert gas injecting in the airtight glass shell, however this scheme equally also complex design, cost height.
Summary of the invention
The technical problem that the utility model will solve is to overcome the problem that exists in the above-mentioned prior art and provides a kind of safety and circuit structure simply also can effectively realize the low noise control circuit of the electromagnetic oven of noise reduction.
In order to solve the problems of the technologies described above; The technical scheme that the utility model adopts is: a kind of low noise control circuit of electromagnetic oven comprises filter circuit, is provided with the main resonance loop of IGBT; The IGBT protective circuit comprises the electromagnetic relay and the triode of power supply, control main resonance loop conducting; Electromagnetic relay comprises relay switch of being located in the main resonance loop and the relay coil that is connected in series with triode, and being provided with in the said IGBT protective circuit with relay coil is connected in parallel has an electrode capacitance.
Aforementioned relay coil and diode are connected in parallel.Relay coil one end is connected with transistor collector, transistor emitter ground connection, and base stage is connected with single-chip microcomputer.
Also be in series with divider resistance one between aforementioned triode and the single-chip microcomputer.
Connect between power supply and the electromagnetic relay in the aforementioned IGBT protective circuit and be provided with divider resistance two.
Electromagnetic relay comprises to be located in the main resonance loop, and the relay switch between drum and the IGBT is gone in series connection, the relay coil that carries out adhesive with relay switch behind the reception Continuity signal.
The aforementioned electromagnetic relay is normally opened relay or normally closed relay.
Connecting between power supply and the electromagnetic relay in the IGBT protective circuit in another preferred embodiment is provided with voltage stabilizing didoe and realizes the dividing potential drop effect, and aforementioned have electrode capacitance to connect with a resistance.
It is aforementioned that electrode capacitance is arranged is electrochemical capacitor.
Reduce the pace of change of electromagnetic relay voltage through being provided with the electrode capacitance that has that is connected in parallel with electromagnetic relay in the utility model IGBT protective circuit; The buffering that reaches electromagnetic relay drives effect; The mutual impact dynamics that reduces the internal mechanical contact realizes noise reduction; Also reduced simultaneously the inner reed deformation of electromagnetic relay probability, the useful life of improving electromagnetic relay.
Description of drawings
Fig. 1 is the circuit diagram of the low noise control circuit execution mode one of a kind of electromagnetic oven of the utility model.
Fig. 2 is the circuit diagram of the low noise control circuit execution mode two of a kind of electromagnetic oven of the utility model.
The main element label:
Triode 7 divider resistances 1
Divider resistance 29 voltage stabilizing didoes 10
Embodiment
Further specify the technical scheme of the utility model below in conjunction with accompanying drawing and embodiment.
As shown in Figure 1; Low noise control circuit execution mode one for a kind of electromagnetic oven of the utility model; Comprise filter circuit 1, be provided with the main resonance loop 2 of IGBT, wherein the IGBT protective circuit comprises electromagnetic relay 4, and the triode 7 of power supply 3, control main resonance loop 2 conductings.
In the IGBT protective circuit, electromagnetic relay 4 one ends are connected with triode 7 collector electrodes, the grounded emitter of triode 7, and base stage is connected with single-chip microcomputer, and also is in series with divider resistance 1 between triode 7 and the single-chip microcomputer.The other end that links to each other with electromagnetic relay 4 is provided with power supply 3, and between power supply 3 and electromagnetic relay 4, connects and be provided with divider resistance 29.
Preferred embodiment in one, what electromagnetic relay 4 adopted is often to drive electromagnetic relay.
As shown in Figure 1; When triode 7 base stages are received the high level signal from single-chip microcomputer; Have electrode capacitance 5 to carry out quick charge, electromagnetic relay 4 voltage slowly rise, and the suction that electromagnetic relay 4 repeat circuit coils 42 produce increases gradually; Until be series at the main resonance loop in relay switch 41 adhesive mutually, conducting IGBT protective circuit.
When triode 7 base stages receive the low level from single-chip microcomputer; Triode 7 ends; The electrode capacitance 5 that has in the IGBT protective circuit discharges, and electromagnetic relay 4 voltage are reduced to zero gradually, and the suction that electromagnetic relay 4 repeat circuit coils 42 produce weakens gradually; Until breaking off with relay switch 41, disconnection is connected with IGBT-'s.
Be this creation execution mode two like Fig. 2, they are different with aforementioned embodiments one to be in the divider resistance 29 of connecting between: power supply 3 and the electromagnetic relay 4 and to be set to voltage stabilizing didoe 10, and same also is the effect that realizes dividing potential drop.Have electrode capacitance 5 and a resistance to be connected in series, in electrode capacitance 5 power up were arranged, resistance made to have the charging process of electrode capacitance 5 mild, made the voltage at relay coil 42 two ends of electromagnetic relay 4 steadily rise then.
In other embodiments, the electromagnetic relay 4 here also can be set to normally closed electromagnetic relay.
In the utility model; Since in the IGBT protective circuit divider resistance 29 with powering on-dividing potential drop charging and outage-discharge process of electrode capacitance 5 arranged; The voltage at electromagnetic relay 4 relay coils 42 two ends has produced effect cumulative, that gradually fall; The suction that relay coil 42 is produced has also produced progressive formation, and final the realization had the certain buffering and the action effect of damping to the attracting process of relay switch, has controlled the noise source and noise is finally effectively reduced.
According to the principle of the utility model, the variation that is equal to that scheme IGBT protective circuit is done all should drop on the desired scope of claim of the utility model.Will be appreciated that; Above embodiment is used for explaining the utility model; And be not the qualification that is used as the utility model, as long as in the connotation scope of the utility model, all will drop in the novel claims scope of this use variation, the modification of the above embodiment.
Claims (8)
1. the low noise control circuit of an electromagnetic oven comprises filter circuit, is provided with the main resonance loop of IGBT; The IGBT protective circuit comprises the electromagnetic relay and the triode of power supply, control main resonance loop conducting; Electromagnetic relay comprise the relay switch that is connected in the main resonance loop and with the relay coil that triode is connected in series, it is characterized in that: being provided with in the said IGBT protective circuit with relay coil is connected in parallel has an electrode capacitance.
2. the low noise control circuit of a kind of electromagnetic oven according to claim 1, it is characterized in that: said relay coil and diode are connected in parallel.
3. the low noise control circuit of a kind of electromagnetic oven according to claim 2, it is characterized in that: said relay coil one end is connected with transistor collector, transistor emitter ground connection, base stage is connected with single-chip microcomputer.
4. the low noise control circuit of a kind of electromagnetic oven according to claim 3 is characterized in that: also be in series with divider resistance one between said triode and the single-chip microcomputer.
5. the low noise control circuit of a kind of electromagnetic oven according to claim 1 is characterized in that: connecting between power supply and the electromagnetic relay in the said IGBT protective circuit is provided with divider resistance two.
6. the low noise control circuit of a kind of electromagnetic oven according to claim 1 is characterized in that: connecting between power supply and the electromagnetic relay in the said IGBT protective circuit is provided with voltage stabilizing didoe.
7. according to the low noise control circuit of each described a kind of electromagnetic oven of claim 1-6, it is characterized in that: said electromagnetic relay is normally opened relay or normally closed relay.
8. according to the low noise control circuit of each described a kind of electromagnetic oven of claim 1-6, it is characterized in that: said electrode capacitance is arranged is electrochemical capacitor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203133420U CN202261887U (en) | 2011-08-25 | 2011-08-25 | Low-noise control circuit of electromagnetic oven |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203133420U CN202261887U (en) | 2011-08-25 | 2011-08-25 | Low-noise control circuit of electromagnetic oven |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202261887U true CN202261887U (en) | 2012-05-30 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011203133420U Expired - Lifetime CN202261887U (en) | 2011-08-25 | 2011-08-25 | Low-noise control circuit of electromagnetic oven |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202261887U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103065871A (en) * | 2013-01-09 | 2013-04-24 | 深圳市元征软件开发有限公司 | Realizing circuit capable of reducing power consumption of electromagnetic relay |
| CN105428154A (en) * | 2015-12-04 | 2016-03-23 | 北京亚澳博信通信技术有限公司 | Direct-current electromagnetic relay drive circuit and drive method therefor |
| CN108626466A (en) * | 2017-03-20 | 2018-10-09 | 佛山市顺德区美的电热电器制造有限公司 | Driving circuit, electromagnetic exhaust valve, method for exhausting and cooking apparatus |
| CN112509866A (en) * | 2020-12-22 | 2021-03-16 | 华人运通(江苏)技术有限公司 | Contactor control method and device and terminal equipment |
| WO2021147579A1 (en) * | 2020-01-21 | 2021-07-29 | 福建安麟智能科技股份有限公司 | Fireproof smoke-blocking electric motor brake control circuit |
-
2011
- 2011-08-25 CN CN2011203133420U patent/CN202261887U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103065871A (en) * | 2013-01-09 | 2013-04-24 | 深圳市元征软件开发有限公司 | Realizing circuit capable of reducing power consumption of electromagnetic relay |
| CN105428154A (en) * | 2015-12-04 | 2016-03-23 | 北京亚澳博信通信技术有限公司 | Direct-current electromagnetic relay drive circuit and drive method therefor |
| CN108626466A (en) * | 2017-03-20 | 2018-10-09 | 佛山市顺德区美的电热电器制造有限公司 | Driving circuit, electromagnetic exhaust valve, method for exhausting and cooking apparatus |
| WO2021147579A1 (en) * | 2020-01-21 | 2021-07-29 | 福建安麟智能科技股份有限公司 | Fireproof smoke-blocking electric motor brake control circuit |
| CN112509866A (en) * | 2020-12-22 | 2021-03-16 | 华人运通(江苏)技术有限公司 | Contactor control method and device and terminal equipment |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP02 | Change in the address of a patent holder | ||
| CP02 | Change in the address of a patent holder |
Address after: Huaiyin District of Ji'nan City, Shandong Province, 250118 US 999 miles 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 |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120530 |