CN203301781U - Control circuit of electromagnetic oven - Google Patents
Control circuit of electromagnetic oven Download PDFInfo
- Publication number
- CN203301781U CN203301781U CN2013203092256U CN201320309225U CN203301781U CN 203301781 U CN203301781 U CN 203301781U CN 2013203092256 U CN2013203092256 U CN 2013203092256U CN 201320309225 U CN201320309225 U CN 201320309225U CN 203301781 U CN203301781 U CN 203301781U
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- circuit
- electromagnetic oven
- mcu
- filter
- control circuit
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Abstract
A control circuit of an electromagnetic oven is characterized by comprising a rectifier circuit, an LC resonance circuit, a filter circuit, a relay control circuit, an MCU circuit and a drive circuit, wherein the input end of the rectifier circuit is connected with a mains supply, the rectifier circuit is connected with the filter circuit, the filter circuit is connected with the LC resonance circuit, the LC resonance circuit is connected with the drive circuit, the drive circuit is connected with the MCU circuit, and the MCU circuit is connected with the relay control circuit. Low-power continuous heating of the electromagnetic oven is realized. Switching loss of an IGBT when the electromagnetic oven is under high voltage and low power is reduced. Security and reliability of the electromagnetic oven are improved, and the service life of the electromagnetic oven is prolonged.
Description
Technical field
The utility model relates to the technical field of household cookware, especially a kind of control circuit of electromagnetic oven.
Background technology
Electromagnetic oven has another name called electromagnetic stove, is the product of modern kitchen revolution, and it is without naked light or conduction-type heats and allow heat directly in the bottom of a pan, produce, so the heat efficiency is greatly improved.Be a kind of energy-efficient kitchen utensils, be different from all fire being arranged or heat kitchen tools without the fire conduction of tradition fully.Electromagnetic oven is the electric cooking apparatus that utilizes electromagnetic inductive heating principle to make.By high-frequency induction heating coil (being magnet exciting coil), High frequency power conversion equipment, controller and ferromagnetic material the bottom of a pan cooker etc., partly formed.During use, in heater coil, pass into alternating current, around coil, just produce an alternating magnetic field, the magnetic line of force of alternating magnetic field is most of by metal pan, in the bottom of a pan, produces a large amount of eddy current, thereby produces the required heat of culinary art.In heating process, there is no naked light, so safety, health.
Electromagnetic oven has been broken the principle of heating that traditional naked light cooking method adopts magnetic field induction electric current (being called again eddy current), electromagnetic oven be by the electronic circuit board part produce alternating magnetic field, when when containing irony pan bottom placement boiler face, pan namely cuts the alternation magnetic line of force and in the pan bottom metal, partly produces the electric current (being eddy current) of alternation, eddy current makes the free electron in the ferrous material of pan bottom be the alternate motion of whirlpool shape, and the Joule heat (P=I^2*R) by electric current makes the bottom of a pan heating.(therefore: the thermal source that electromagnetic oven is cooked comes from the pan bottom rather than electromagnetic oven heating itself is conducted to pan, so the heat efficiency all exceeds nearly 1 times than the efficiency of all cookers) utensil itself is generated heat at a high speed voluntarily, be used for heating and cooking food, thereby reach the purpose of cooking.Have that quick heating, the heat efficiency are high, the flames of anger, smoke dust, without pernicious gas, to surrounding environment do not produce thermal radiation, volume is small and exquisite, fail safe good and the advantage such as appearance looks elegant, the overwhelming majority that can complete family cooks task.Therefore, in universal some countries of electromagnetic oven, people's reputation be " god of culinary art " and " green stove and accessory ".Because producing eddy current by the direct induced field in the bottom of a pan, electromagnetic oven produces heat; therefore should select irony (stainless steel) cooker that meets the requirement of electromagnetic oven Design cooling load; the cooker of other materials is excessive or too small due to resistivity of material; can cause induction cooker load extremely to start protection automatically, cisco unity malfunction.Simultaneously because iron is abundant to the absorption in magnetic field, shield effectiveness is also very good, has reduced so a lot of magnetic radiations, so iron pan is also all safer than the cooker of other any materials.In addition, iron is the material useful to health, is also the essential elements that human body need to absorb for a long time.
The electromagnetic oven major loop is comprised of rectification, filtering, LC parallel resonance and IGBT switching circuit at present.Because of the on-off action of IGBT, the direct current of rectification, filtering is formed to the high-frequency alternating electric current on coil and produce the alternating magnetic field power output.The resonant parameter of magnet exciting coil L and capacitor C is constant at present.Guarantee that IGBT is in low damage state, will high-powerly heat.Want to realize the low power laser heating of 200W, the natural resonance frequency that switching frequency will substantial deviation LC.IGBT just is in more on off state, and loss increases, and heating is serious, even burns pipe.
Summary of the invention
The utility model is the low-power laser heating function that realizes electromagnetic oven, and a kind of control circuit of electromagnetic oven is provided.
The technical solution of the utility model is achieved in that and comprises rectification circuit, LC resonant circuit, filter circuit, control relay circuit, MCU circuit and drive circuit; The input termination civil power of described rectification circuit; Described rectification circuit is connected with filter circuit, and filter circuit is connected with the LC resonant circuit, and the LC resonant circuit is connected with drive circuit, and drive circuit is connected with the MCU circuit, and the MCU circuit is connected with control relay circuit.
Two electric shocks of described control relay circuit repeat circuit connect respectively two taps of heat-generating disc L.
Described MCU control circuit is comprised of single-chip microcomputer.
The utility model has been realized the lower powered laser heating of electromagnetic oven.Reduced the switching loss of electromagnetic oven IGBT when the high voltage low-power.Improve fail safe, the reliability of electromagnetic oven, extended the useful life of electromagnetic oven.
The accompanying drawing explanation
Fig. 1 is schematic diagram of the present utility model.
The 1-rectification circuit; The 2-filter circuit; The 3-LC resonant circuit; The 4-drive circuit; The 5-MCU circuit; The 6-relay circuit.
Embodiment
As shown in Figure 1, comprise rectification circuit, LC resonant circuit, filter circuit, control relay circuit, MCU circuit and drive circuit; The input termination civil power of described rectification circuit; Described rectification circuit is connected with filter circuit, and filter circuit is connected with the LC resonant circuit, and the LC resonant circuit is connected with drive circuit, and drive circuit is connected with the MCU circuit, and the MCU circuit is connected with control relay circuit; Two electric shocks of described control relay circuit repeat circuit connect respectively two taps of heat-generating disc L; Described MCU control circuit is comprised of single-chip microcomputer; Described rectification circuit 1 is comprised of rectifier bridge BR; Described filter circuit 2 is comprised of L1 and C1; Described LC resonant circuit is comprised of LC, C2 and IGBT; Described drive circuit 4 is comprised of R1, R2, R3, R4, R5, R6, C3, C4, C5, Q1, Q2, Q3, Q4; Described control relay circuit 5 is comprised of relay R LY1, Q5, R7; Described MCU circuit 6 is comprised of single-chip microcomputer; The utility model is the low-power laser heating function that realizes electromagnetic oven, on the basis of controlling circuit of electromagnetic furnace prior art, MCU circuit and control relay circuit have been set up, MCU circuit one end is connected with drive circuit, the other end is connected with control relay circuit, electromagnetic oven is when work, as power output between 1200-2000W, single-chip microcomputer output high level, the relay adhesive, one group of short circuit in winding by heat-generating disc, make lc circuit be operated in normal resonance condition, the IGBT conducting voltage is lower, and temperature rise is also lower.When power is following lower than 1200W, the single-chip microcomputer output low level, relay contacts disconnects, and the heat-generating disc inductance value increases, and also makes lc circuit be operated in resonance condition, has realized the lower powered laser heating of electromagnetic oven.Reduced the switching loss of electromagnetic oven IGBT when the high voltage low-power.Improve fail safe, the reliability of electromagnetic oven, extended the useful life of electromagnetic oven.
Claims (3)
1. the control circuit of an electromagnetic oven, is characterized in that: comprise rectification circuit, LC resonant circuit, filter circuit, control relay circuit, MCU circuit and drive circuit; The input termination civil power of described rectification circuit; Described rectification circuit is connected with filter circuit, and filter circuit is connected with the LC resonant circuit, and the LC resonant circuit is connected with drive circuit, and drive circuit is connected with the MCU circuit, and the MCU circuit is connected with control relay circuit.
2. the control circuit of a kind of electromagnetic oven according to claim 1, it is characterized in that: two electric shocks of described control relay circuit repeat circuit connect respectively two taps of heat-generating disc L.
3. the control circuit of a kind of electromagnetic oven according to claim 1, it is characterized in that: described MCU control circuit is comprised of single-chip microcomputer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013203092256U CN203301781U (en) | 2013-05-31 | 2013-05-31 | Control circuit of electromagnetic oven |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013203092256U CN203301781U (en) | 2013-05-31 | 2013-05-31 | Control circuit of electromagnetic oven |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203301781U true CN203301781U (en) | 2013-11-20 |
Family
ID=49577757
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013203092256U Expired - Lifetime CN203301781U (en) | 2013-05-31 | 2013-05-31 | Control circuit of electromagnetic oven |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203301781U (en) |
-
2013
- 2013-05-31 CN CN2013203092256U patent/CN203301781U/en not_active Expired - Lifetime
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20131120 |
|
| CX01 | Expiry of patent term |