CN206807813U - Auxiliary power supply circuit, power circuit and micro-wave oven - Google Patents
Auxiliary power supply circuit, power circuit and micro-wave oven Download PDFInfo
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- CN206807813U CN206807813U CN201720348900.4U CN201720348900U CN206807813U CN 206807813 U CN206807813 U CN 206807813U CN 201720348900 U CN201720348900 U CN 201720348900U CN 206807813 U CN206807813 U CN 206807813U
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Abstract
The utility model discloses a kind of auxiliary power supply circuit, power circuit and micro-wave oven, the auxiliary power supply circuit includes single tube resonance circuit, power supply circuit, mu balanced circuit, the second reduction voltage circuit and the rectification circuit being composed in series by primary winding and power switch pipe；The power supply circuit is in parallel with the single tube resonance circuit, and the power supply circuit includes the first reduction voltage circuit and filter circuit, and first reduction voltage circuit and the filter circuit are connected in series；The mu balanced circuit and the filter circuit simultaneously connect；One end of the rectification circuit is connected with the mu balanced circuit, and the other end of the rectification circuit is connected with one end of second reduction voltage circuit；The input of another termination power switch pipe of second reduction voltage circuit.Auxiliary power supply circuit, power circuit and micro-wave oven disclosed in the utility model, circuit conversion efficiency is high, and small, reliable operation is lost.
Description
Technical field
The utility model is related to microwave oven supply power technical field, more particularly to a kind of auxiliary power supply circuit, power circuit and
Micro-wave oven.
Background technology
Frequency-conversion microwave oven is high with its efficiency, homogeneous heating in the unit interval and receive the favor of increasing user.
Compared with traditional microwave oven supply power, frequency-conversion microwave oven power supply employs the Switching Power Supply of power continuously adjustabe within the specific limits
Instead of power output can not continuously adjustable Industrial Frequency Transformer.
During the utility model is realized, inventor has found that prior art has problems with：Existing micro-wave oven
Power supply is mostly half-bridge resonance topological structure, and half-bridge resonance electric circuit characteristic is that its output voltage is burning voltage, and microwave oven supply power
Output voltage be 4.2KV high pressure.If a stable low pressure is obtained from the secondary windings of transformer is used as work(
Bigger difficulty be present, it is necessary to reliably solve the problems, such as insulation and space wiring distance in the power supply of rate switching tube.And such as
Fruit is used in ac input end power taking, is depressured and filtered with resistance after diode rectification, then electric with voltage-regulator diode parallel filtering
Road voltage regulation way power supply, resistance loss is big, and efficiency is low.
Utility model content
Main purpose of the present utility model is to propose a kind of auxiliary power supply circuit, power circuit and micro-wave oven, it is intended to solves
The problem of certainly prior art is present.
To achieve the above object, the utility model embodiment first aspect provides a kind of auxiliary power supply electricity of microwave oven supply power
Road, including be composed in series by primary winding and power switch pipe single tube resonance circuit, power supply circuit, mu balanced circuit,
Second reduction voltage circuit and rectification circuit；
The power supply circuit is in parallel with the single tube resonance circuit, and the power supply circuit includes the first reduction voltage circuit and filtering
Circuit, first reduction voltage circuit and the filter circuit are connected in series；
The mu balanced circuit is connected in parallel with the filter circuit；
One end of the rectification circuit is connected with the mu balanced circuit, the other end of the rectification circuit and the described second drop
One end connection of volt circuit；The input of another termination power switch pipe of second reduction voltage circuit.
Further, the auxiliary power supply circuit also includes the first electric capacity；First electric capacity and single tube resonance electricity
Road is connected in parallel.
Further, first reduction voltage circuit includes first resistor, and the filter circuit includes the second electric capacity, and described
One resistance is connected in series with the second electric capacity.
Further, the mu balanced circuit includes voltage-stabiliser tube, second resistance, the 3rd electric capacity；
The voltage-stabiliser tube and the filter circuit simultaneously connect；
The series-connection circuit of the second resistance and the 3rd electric capacity composition is connected in parallel with the voltage-stabiliser tube.
Further, the rectification circuit includes the first commutation diode and the second commutation diode being connected in series；
The negative electrode of first commutation diode and the second resistance and the 3rd capacitance connection；First rectification
The anode of diode is connected with one end of second reduction voltage circuit；
The negative electrode of second commutation diode is connected with the anode of first commutation diode, second rectification two
The anode of pole pipe is connected to ground.
Further, second reduction voltage circuit includes the inductance and the 4th electric capacity being connected in series；
The inductance is connected with the anode of first commutation diode, and one end of the 4th electric capacity is opened with the power
Close the input connection of pipe.
Further, the single tube resonance circuit also includes the 5th electric capacity；
5th electric capacity is connected with the primary winding parallel.
Further, the power switch pipe is insulated gate bipolar transistor or metal oxide semiconductor field-effect
Pipe；
The control terminal is the grid of insulated gate bipolar transistor, and the input is insulated gate bipolar transistor pipe
Colelctor electrode, the output end be insulated gate bipolar transistor emitter stage；Or the control terminal is that metal oxide is partly led
The grid of body FET, the input are the drain electrode of metal oxide semiconductor field effect tube, and the output end is metal
The source electrode of oxide semiconductor field effect pipe.
In addition, to achieve the above object, the utility model embodiment second aspect provides a kind of microwave oven supply power circuit, institute
Stating microwave oven supply power circuit includes a kind of auxiliary power supply circuit of above-mentioned microwave oven supply power.
Furthermore to achieve the above object, the utility model embodiment third aspect provides a kind of micro-wave oven, the micro-wave oven
Including a kind of above-mentioned microwave oven supply power circuit.
Auxiliary power supply circuit, power circuit and the micro-wave oven that the utility model embodiment provides, circuit conversion efficiency is high, damage
Consume small, reliable operation.
Brief description of the drawings
Fig. 1 is the auxiliary power supply electrical block diagram of the microwave oven supply power of the utility model embodiment.
Realization, functional characteristics and the advantage of the utility model purpose will be described further referring to the drawings in conjunction with the embodiments.
Embodiment
It should be appreciated that specific embodiment described herein is not used to limit this only to explain the utility model
Utility model.
The each embodiment of the utility model is realized referring now to accompanying drawing description.In follow-up description, using for
The suffix of such as " module ", " part " or " unit " of element is represented only for being advantageous to explanation of the present utility model, itself
Not specific meaning.
The description for being related to " first ", " second " etc. in the utility model is only used for describing purpose, and it is not intended that referring to
Show or imply its relative importance or imply the quantity of the technical characteristic indicated by indicating.Thus, " first ", " are defined
At least one this feature can be expressed or be implicitly included to two " feature.In addition, the technical scheme between each embodiment can
To be combined with each other, but must can be implemented as basis with those of ordinary skill in the art, when the combination of technical scheme occurs
It is conflicting or will be understood that the combination of this technical scheme is not present when can not realize, also not in the guarantor of the requires of the utility model
Within the scope of shield.
First embodiment：
As shown in figure 1, a kind of auxiliary power supply circuit of microwave oven supply power of the utility model first embodiment offer, including by
Single tube resonance circuit 10 that transformer T armature windings and power switch pipe Q1 are composed in series, power supply circuit 11, mu balanced circuit 12,
Second reduction voltage circuit 14 and rectification circuit 13；
Power supply circuit 11 is in parallel with single tube resonance circuit 10, and power supply circuit 11 includes the first reduction voltage circuit and filter circuit,
First reduction voltage circuit and filter circuit are connected in series；
Mu balanced circuit 12 and filter circuit simultaneously connect；
One end of rectification circuit 13 is connected with mu balanced circuit 12, the other end of rectification circuit 13 and the second reduction voltage circuit 14
One end connects；Another termination power switch pipe Q1 of second reduction voltage circuit 14 input.
In the present embodiment, transformer T secondary windings is connected with output loop, and output loop is used for the magnetic for micro-wave oven
Keyholed back plate is powered.Output loop can be the voltage doubling rectifing circuit or other circuits of prior art, and therefore not to repeat here.
In the present embodiment, power switch pipe Q1 output head grounding, control terminal are used to receive control signal, control signal
It can be pwm signal.
In the present embodiment, auxiliary power supply circuit also includes the first electric capacity C1；First electric capacity C1 and single tube resonance circuit 10
It is connected in parallel.
In the present embodiment, the first reduction voltage circuit includes first resistor R1, and filter circuit includes the second electric capacity C2, the first electricity
Resistance R1 and the second electric capacity C2 is connected in series.
In the present embodiment, mu balanced circuit 12 includes voltage-stabiliser tube ZD1, second resistance R2, the 3rd electric capacity C3；
Voltage-stabiliser tube ZD1 is connected in parallel with filter circuit, i.e., is connected in parallel with the second electric capacity C2；
The series-connection circuit of second resistance R2 and the 3rd electric capacity C3 compositions is connected in parallel with voltage-stabiliser tube ZD1.
In the present embodiment, rectification circuit includes the first commutation diode D1 and the second commutation diode being connected in series
D2；First commutation diode D1 negative electrode is connected with second resistance R2 and the 3rd electric capacity C3；First commutation diode D1 anode
It is connected with one end of the second reduction voltage circuit 14；Second commutation diode D2 negative electrode and the first commutation diode D1 anode connect
Connect, the second commutation diode D2 anode is connected to ground.
In the present embodiment, the second reduction voltage circuit 14 includes the inductance L1 and the 4th electric capacity C4 being connected in series；Inductance L1 with
First commutation diode D1 anode connection, the 4th electric capacity C4 one end is connected with power switch pipe Q1 input.At other
In mode, the second reduction voltage circuit 14 also includes the resistance (not shown) being connected in series, the resistance and the electricity of inductance L1 and the 4th
Hold putting in order for C4 not to be restricted.
In the present embodiment, single tube resonance circuit 10 also includes the 5th electric capacity C5；5th electric capacity C5 and transformer T primary around
Group is connected in parallel.
In the present embodiment, power switch pipe Q1 can be that insulated gate bipolar transistor (IGBT) or metal oxide are partly led
Body FET (MOSFET)；
Control terminal is the grid of insulated gate bipolar transistor, and input is the current collection of insulated gate bipolar transistor pipe
Pole, output end are the emitter stage of insulated gate bipolar transistor；Or the grid that control terminal is metal oxide semiconductor field effect tube
Pole, input are the drain electrode of metal oxide semiconductor field effect tube, and output end is metal oxide semiconductor field effect tube
Source electrode.
In the present embodiment, alternating current by bulky capacitor C1 filtering after, flow through all the way single tube resonance circuit transformer T,
Electric capacity C5 and power tube Q1, it is depressured all the way by resistance R1, the direct current stablized after C2 capacitor filterings and voltage-stabiliser tube ZD1 voltage stabilizings
Voltage, before chip does not work, power supply is in holding state, and the electric current that it is consumed is smaller, therefore resistance R1 can take one
The resistance of big resistance, it is only necessary to the electric current can for providing 2mA or so supports the normal startup of chip, so resistance R1 losses compared with
It is small.After chip starts, pwm signal input power switch pipe Q1 control terminal, single tube resonance circuit, which is started working, produces high pressure
To drive magnetron, another way Q1 input power taking, through electric capacity C4, after inductance L1 decompressions, through diode D1, D2 rectification
Afterwards, then after electric capacity C3 filtering a DC voltage is obtained, obtaining a stable DC electricity through R2 current limlitings, after C2 filtering and ZD1 voltage stabilizings carries
Chip is supplied, ensures that chip power supply is continual and steady.
The whole work process of this example is；Starting current is provided by resistance R1 first, after chip startup, then by second
Reduction voltage circuit L1, C4 provide the most running current needed for chip.
In this example, electric capacity C4 and inductance L1 is lossless element, so loss is smaller, conversion efficiency is relative with simple
Resistance decompression efficiency will height, power consumption greatly reduces, and improves operating efficiency and the reliability of device.
The auxiliary power supply circuit for the microwave oven supply power that the utility model embodiment provides, circuit conversion efficiency is high, and loss is small,
Reliable operation.
Second embodiment
The utility model second embodiment provides a kind of microwave oven supply power circuit, and microwave oven supply power circuit, which includes first, to be implemented
A kind of auxiliary power supply circuit of microwave oven supply power described in example.
The microwave oven supply power circuit that the utility model embodiment provides, circuit conversion efficiency is high, and small, reliable operation is lost.
3rd embodiment
The utility model 3rd embodiment provides a kind of micro-wave oven, and micro-wave oven includes a kind of microwave described in second embodiment
Stove power circuit.
The micro-wave oven that the utility model embodiment provides, circuit conversion efficiency is high, and small, reliable operation is lost.
It should be noted that herein, term " comprising ", "comprising" or its any other variant are intended to non-row
His property includes, so that process, method, article or device including a series of elements not only include those key elements, and
And also include the other element being not expressly set out, or also include for this process, method, article or device institute inherently
Key element.In the absence of more restrictions, the key element limited by sentence "including a ...", it is not excluded that including this
Other identical element also be present in the process of key element, method, article or device.
Preferred embodiment of the present utility model is these are only, not thereby limits the scope of the claims of the present utility model, it is every
The equivalent structure or equivalent flow conversion made using the utility model specification and accompanying drawing content, or be directly or indirectly used in
Other related technical areas, similarly it is included in scope of patent protection of the present utility model.
Claims (10)
1. a kind of auxiliary power supply circuit of microwave oven supply power, including be composed in series by primary winding and power switch pipe
Single tube resonance circuit, power supply circuit, mu balanced circuit, the second reduction voltage circuit and rectification circuit；
The power supply circuit is in parallel with the single tube resonance circuit, and the power supply circuit includes the first reduction voltage circuit and filtered electrical
Road, first reduction voltage circuit and the filter circuit are connected in series；
The mu balanced circuit and the filter circuit simultaneously connect；
One end of the rectification circuit is connected with the mu balanced circuit, the other end of the rectification circuit and the described second decompression electricity
One end connection on road；The input of another termination power switch pipe of second reduction voltage circuit；The power switch pipe
Output head grounding, the control terminal of the power switch pipe is used to receive control signal.
A kind of 2. auxiliary power supply circuit of microwave oven supply power according to claim 1, it is characterised in that the auxiliary power supply
Circuit also includes the first electric capacity；First electric capacity is connected in parallel with the single tube resonance circuit.
A kind of 3. auxiliary power supply circuit of microwave oven supply power according to claim 1, it is characterised in that first decompression
Circuit includes first resistor, and the filter circuit includes the second electric capacity, and the first resistor is connected in series with the second electric capacity.
A kind of 4. auxiliary power supply circuit of microwave oven supply power according to claim 1, it is characterised in that the mu balanced circuit
Including voltage-stabiliser tube, second resistance, the 3rd electric capacity；
The voltage-stabiliser tube is connected in parallel with the filter circuit；
The series-connection circuit of the second resistance and the 3rd electric capacity composition is connected in parallel with the voltage-stabiliser tube.
A kind of 5. auxiliary power supply circuit of microwave oven supply power according to claim 4, it is characterised in that the rectification circuit
Including the first commutation diode and the second commutation diode being connected in series；
The negative electrode of first commutation diode and the second resistance and the 3rd capacitance connection；The pole of first rectification two
The anode of pipe is connected with one end of second reduction voltage circuit；
The negative electrode of second commutation diode is connected with the anode of first commutation diode, second commutation diode
Anode be connected to ground.
A kind of 6. auxiliary power supply circuit of microwave oven supply power according to claim 5, it is characterised in that second decompression
Circuit includes the inductance and the 4th electric capacity being connected in series；
The inductance is connected with the anode of first commutation diode, one end and the power switch pipe of the 4th electric capacity
Input connection.
A kind of 7. auxiliary power supply circuit of microwave oven supply power according to claim 1, it is characterised in that the single tube resonance
Circuit also includes the 5th electric capacity；
5th electric capacity is connected with the primary winding parallel.
A kind of 8. auxiliary power supply circuit of microwave oven supply power according to claim 1, it is characterised in that the power switch
Manage as insulated gate bipolar transistor or metal oxide semiconductor field effect tube；
The control terminal is the grid of insulated gate bipolar transistor, and the input is the collection of insulated gate bipolar transistor pipe
Electrode, the output end are the emitter stage of insulated gate bipolar transistor；Or the control terminal is MOS field
The grid of effect pipe, the input are the drain electrode of metal oxide semiconductor field effect tube, and the output end aoxidizes for metal
The source electrode of thing semiconductor field.
9. a kind of microwave oven supply power circuit, it is characterised in that it is any described that the microwave oven supply power circuit includes claim 1-8
A kind of microwave oven supply power auxiliary power supply circuit.
10. a kind of micro-wave oven, it is characterised in that the micro-wave oven includes a kind of microwave oven supply power circuit described in claim 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720348900.4U CN206807813U (en) | 2017-04-05 | 2017-04-05 | Auxiliary power supply circuit, power circuit and micro-wave oven |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720348900.4U CN206807813U (en) | 2017-04-05 | 2017-04-05 | Auxiliary power supply circuit, power circuit and micro-wave oven |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206807813U true CN206807813U (en) | 2017-12-26 |
Family
ID=60731629
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720348900.4U Active CN206807813U (en) | 2017-04-05 | 2017-04-05 | Auxiliary power supply circuit, power circuit and micro-wave oven |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206807813U (en) |
-
2017
- 2017-04-05 CN CN201720348900.4U patent/CN206807813U/en active Active
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