CN206620068U - A kind of magnetron power source - Google Patents
A kind of magnetron power source Download PDFInfo
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- CN206620068U CN206620068U CN201720350061.XU CN201720350061U CN206620068U CN 206620068 U CN206620068 U CN 206620068U CN 201720350061 U CN201720350061 U CN 201720350061U CN 206620068 U CN206620068 U CN 206620068U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
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Abstract
The utility model is related to magnetron technology field, discloses a kind of magnetron power source, including：Main power circuit, single-chip microcomputer governor circuit, driving synchronous circuit and IGBT drive circuit, main power circuit is by driving synchronous circuit, IGBT drive circuit and single-chip microcomputer governor circuit to connect；Main power circuit includes：Rectification circuit, LC filter circuits, LC resonance circuits, IGBT switches and voltage doubling rectifing circuit, one end of rectification circuit is connected with external power source, the other end is connected with LC filter circuits, LC resonance circuits are connected in parallel with LC filter circuits again after being connected with IGBT switches, the coil of LC resonance circuits and the coil magnetic coupling of voltage doubling rectifing circuit；Driving synchronous circuit is used for the zero crossing for monitoring LC resonance circuits, so that single-chip microcomputer governor circuit drives IGBT to switch by IGBT drive circuit, magnetron power source is controlled by the synchronizing process of LC resonance circuits and IGBT switches, reduce the voltage x current stress of IGBT switches, the reliability of whole power supply is greatly improved, while having the advantages that efficiency high, cost are low.
Description
Technical field
The utility model is related to magnetron technology field, more particularly to a kind of magnetron power source.
Background technology
Magnetron is widely used in the equipment such as radar, micro-wave oven, is the core devices of this kind equipment, for producing specific frequency
The microwave of rate, is a diode being placed in steady electromagnetic field in a sense.Electronics receives phase in diode pipe
Mutually the control of vertical stationary magnetic field and steady electric field, reacts in electromagnetic field of high frequency, obtains microwave energy, thus can
Produce microwave.The major part of magnetron is that vacuum must be kept inside tube core and magnet steel, magnetron.
The anode resonator system of magnetron can not only produce the electromagnetic viscosimeter required for itself, and can produce various
The electromagnetic viscosimeter of different characteristics, wants to make magnetron be operated under stable pattern, usually makes interference mould using " every type band "
Formula is kept apart, and anode vanes are located against every type band connecting one by one, can so make mode of operation with it is adjacent
Frequency interval increase between jamming pattern, in addition, after energy exchange, electronics still has certain energy, this
A little electronics can raise temperature of anode, and the electronics collected with anode increases, the temperature of anode also more and more higher, because
This, anode must have good radiating effect.Power tube usually using forcing wind to freeze, there is fin above anode.And it is big
Power tube is usually freezed using water, has a set of cooling water system above anode, such negative electrode heated current is very big, it is desirable to negative electrode
Negative line not only want short but also thick, coupling part will also ensure there is good contact.During the cathode leg work of high-power pipe
Temperature it is especially high, therefore we are through frequently with forcing wind refrigeration radiating.Negative electrode will be connected to negative when magnetron work is carried out
High pressure, such cathode leg will have good insulation effect, in order to prevent anode from overheating, must after magnetron operating temperature
The electric current of negative electrode must be reduced according to the rules, can so extend the service life of magnetron.
Traditional magnetron power source use semibridge system LLC resonance structures, driving insulated gate bipolar transistor (IGBT,
Insulated Gate Bipolar Transistor) when the problem of be not present synchronous, can be turned on and off with any moment
IGBT, but two IGBT are needed, cost is high, and the upper pipe of half-bridge has " floating ground ", and drive circuit is complicated, further
Add cost.
Utility model content
The main purpose of the utility model embodiment is to propose a kind of magnetron power source, passes through LC resonance circuits and IGBT
The synchronizing process of switch controls magnetron power source, reduces the voltage x current stress of IGBT switches, greatly improves whole power supply
Reliability, while having the advantages that efficiency high, cost are low.
To achieve the above object there is provided a kind of magnetron power source, including：Main power circuit, single-chip microcomputer governor circuit, drive
Dynamic synchronous circuit and IGBT drive circuit, the main power circuit pass through the driving synchronous circuit, IGBT drive circuit and institute
State the connection of single-chip microcomputer governor circuit；The main power circuit includes：Rectification circuit, LC filter circuits, LC resonance circuits, IGBT are opened
Close and voltage doubling rectifing circuit, one end of the rectification circuit is connected with external power source, the other end of the rectification circuit with it is described
LC filter circuits are connected, and the LC resonance circuits are connected in parallel with the LC filter circuits again after being connected with IGBT switches, described
The coil of LC resonance circuits and the coil magnetic coupling of the voltage doubling rectifing circuit；The driving synchronous circuit is used to monitor the LC
The zero crossing of resonance circuit, so that the single-chip microcomputer governor circuit drives IGBT to switch by IGBT drive circuit.
Alternatively, in addition to：It is voltage sampling circuit, current sampling circuit, temperature sensing circuit, over-voltage detection circuit, auxiliary
Power supply circuit and panel communicating circuit are helped, wherein, the voltage sampling circuit is connected with the external power source, and will collect
Magnitude of voltage is sent to the single-chip microcomputer governor circuit；The current sampling circuit is connected with IGBT switches, and will be collected
Current value be sent to the single-chip microcomputer governor circuit；The temperature sensing circuit is connected with the single-chip microcomputer governor circuit；Institute
State over-voltage detection circuit to be connected with the LC resonance circuits, the auxiliary power supply circuit and the external power source, single-chip microcomputer master control
Circuit, voltage sampling circuit, current sampling circuit and IGBT drive circuit connection；The panel communicating circuit and the single-chip microcomputer
Governor circuit is connected.
Alternatively, the rectification circuit includes：Diode D1, diode D2, diode D3 and the diode of bridge-type connection
D4, the positive pole of the diode D1 is connected with one end of diode D3 negative pole and the external power source, the diode D2's
Positive pole is connected with diode D4 negative pole and the other end of the external power source.
Alternatively, the LC filter circuits include：Inductance Ls and electric capacity Cs, the inductance Ls one end and the diode
D1 negative pole and the diode D2 negative pole connection, the other end of the inductance Ls are connected with one end of the electric capacity Cs, institute
The positive pole that the electric capacity Cs other end is stated with the positive pole of the diode D3 and the diode D4 is connected.
Alternatively, the LC resonance circuits include：The electric capacity Cr that is connected in parallel and transformation coil T1, the one of the electric capacity Cr
End is connected with one end of the transformation coil T1 and the other end of the inductance Ls, the other end and the transformation of the electric capacity Cr
The source electrode connection of the coil T1 other end and IGBT switches.
Alternatively, the grid of the IGBT switches is connected with the IGBT drive circuit；The drain electrode of IGBT switch with
Resistance Rs one end connection, the other end of the resistance Rs connects with the positive pole of the diode D3 and the positive pole of the diode D4
Connect；The resistance Rs is in parallel with the current sampling circuit.
Alternatively, one end of the voltage doubling rectifing circuit passes through transformation coil T2 and the transformation coil T1 magnetic couplings, institute
The other end for stating voltage doubling rectifing circuit is connected with magnetron；The transformation coil T1 also with transformation coil T3 magnetic couplings, the change
Line ball circle T3 is connected with magnetron heater.
Alternatively, the driving synchronous circuit includes：Operational amplifier A 1, resistance R1, resistance R2, resistance R3 and resistance
R4, one end of the resistance R1 is connected with one end of the electric capacity Cr, and one end of the resistance R3 is another with the electric capacity Cr's
End connection, the other end of the resistance R1 is connected with one end of the resistance R2 and an input of operational amplifier A 1, institute
The other end for stating resistance R3 is connected with one end of the resistance R4 and another input of operational amplifier A 1, the resistance R2
The other end and the resistance R4 other end be grounded, the output end of the operational amplifier A 1 and the single-chip microcomputer governor circuit
Connection.
Alternatively, the quantity of the IGBT switches is one.
The utility model proposes a kind of magnetron power source, including：Main power circuit, single-chip microcomputer governor circuit, driving are same
Step circuit and IGBT drive circuit, the main power circuit pass through the driving synchronous circuit, IGBT drive circuit and the list
Piece machine governor circuit is connected；The main power circuit includes：Rectification circuit, LC filter circuits, LC resonance circuits, IGBT switch and
Voltage doubling rectifing circuit, one end of the rectification circuit is connected with external power source, and the other end of the rectification circuit is filtered with the LC
Wave circuit is connected, and the LC resonance circuits are connected in parallel with the LC filter circuits again after being connected with IGBT switches, and the LC is humorous
Shake the coil of circuit and the coil magnetic coupling of the voltage doubling rectifing circuit；The driving synchronous circuit is used to monitor the LC resonance
The zero crossing of circuit, so that the single-chip microcomputer governor circuit drives IGBT to switch by IGBT drive circuit, passes through LC resonance electricity
Road controls magnetron power source with the synchronizing process of IGBT switches, reduces the voltage x current stress of IGBT switches, greatly improves
The reliability of whole power supply, while having the advantages that efficiency high, cost are low.
Brief description of the drawings
A kind of circuit diagram for magnetron power source that Fig. 1 provides for the utility model embodiment；
The circuit diagram for the driving synchronous circuit that Fig. 2 provides for 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.
Embodiment
As shown in figure 1, the present embodiment proposes a kind of magnetron power source, including：Main power circuit, single-chip microcomputer governor circuit,
Drive synchronous circuit and IGBT drive circuit, the main power circuit by the driving synchronous circuit, IGBT drive circuit with
The single-chip microcomputer governor circuit connection；The main power circuit includes：Rectification circuit, LC filter circuits, LC resonance circuits, IGBT
Switch and voltage doubling rectifing circuit, one end of the rectification circuit are connected with external power source, the other end of the rectification circuit and institute
The connection of LC filter circuits is stated, the LC resonance circuits are connected in parallel with the LC filter circuits again after being connected with IGBT switches, institute
State the coil of LC resonance circuits and the coil magnetic coupling of the voltage doubling rectifing circuit；The driving synchronous circuit is described for monitoring
The zero crossing of LC resonance circuits, so that the single-chip microcomputer governor circuit drives IGBT to switch by IGBT drive circuit.
In the present embodiment, magnetron power source is controlled by the synchronizing process of LC resonance circuits and IGBT switches, reduced
The voltage x current stress of IGBT switches, greatly improves the reliability of whole power supply, while having low excellent of efficiency high, cost
Point.
In the present embodiment, the quantity of the IGBT switches is one, model 20N135IHR, by detecting LC resonance
The zero crossing of circuit obtains switch switching instant, and IGBT switch switching is carried out at this moment, using can reduce after this circuit
Voltage x current stress and loss on IGBT, are the main power circuit that magnetron power source can be achieved using an IGBT, with half-bridge
Scheme also simplify IGBT drive circuit, so as to reduce the cost of whole magnetron power source, carry compared to an IGBT is reduced
High reliability.
As shown in figure 1, in the present embodiment, in addition to：Voltage sampling circuit, current sampling circuit, temperature sensing circuit,
Over-voltage detection circuit, auxiliary power supply circuit and panel communicating circuit, wherein, the voltage sampling circuit connects with the external power source
Connect, and the magnitude of voltage collected is sent to the single-chip microcomputer governor circuit；The current sampling circuit is switched with the IGBT
Connection, and the current value collected is sent to the single-chip microcomputer governor circuit；The temperature sensing circuit and the single-chip microcomputer
Governor circuit is connected, for gathering environment temperature；The over-voltage detection circuit is connected with the LC resonance circuits, for gathering
The source voltage of IGBT switches；The auxiliary power supply circuit and the external power source, single-chip microcomputer governor circuit, voltage sample electricity
Road, current sampling circuit and IGBT drive circuit connection, for the single-chip microcomputer governor circuit, voltage sampling circuit, electric current
Sample circuit and IGBT drive circuit provide working power；The panel communicating circuit is connected with the single-chip microcomputer governor circuit,
For receiving from outside control signal, and return to the instruction of magnetron power source working condition.
In the present embodiment, the IGBT drive circuit is used to drive high-power IGBT to switch, and in overvoltage, excessively stream, mistake
IGBT switches are turned off when heat, it is to avoid circuit and device failure.
In the present embodiment, the rectification circuit includes：Bridge-type connection diode D1, diode D2, diode D3 and
Diode D4, the positive pole of the diode D1 is connected with one end of diode D3 negative pole and the external power source, two pole
Pipe D2 positive pole is connected with diode D4 negative pole and the other end of the external power source.
In the present embodiment, the model of four diodes is all D20SB80, and parameter is 20A, 800V.
In the present embodiment, the LC filter circuits include：Inductance Ls and electric capacity Cs, one end of the inductance Ls with it is described
Diode D1 negative pole and the diode D2 negative pole connection, one end of the other end of the inductance Ls and the electric capacity Cs connects
Connect, the other end of the electric capacity Cs is connected with the positive pole of the diode D3 and the positive pole of the diode D4.
In the present embodiment, the parameter of the inductance Ls is 82uH, and the parameter of the electric capacity Cs is 3uF/400V.
In the present embodiment, the LC resonance circuits include：The electric capacity Cr and transformation coil T1 being connected in parallel, the electric capacity
Cr one end is connected with one end of the transformation coil T1 and the other end of the inductance Ls, the other end of the electric capacity Cr and institute
State the source electrode connection of transformation coil the T1 other end and IGBT switches.
In the present embodiment, the parameter of the electric capacity Cr is 0.1uF/600V.
In the present embodiment, the grid of the IGBT switches is connected with the IGBT drive circuit；The IGBT switches
Drain electrode is connected with resistance Rs one end, the other end of the resistance Rs and the diode D3 positive pole and the diode D4
Positive pole is connected；The resistance Rs is in parallel with the current sampling circuit.
In the present embodiment, one end of the voltage doubling rectifing circuit passes through transformation coil T2 and the transformation coil T1 magnetic couplings
Close, the other end of the voltage doubling rectifing circuit is connected with magnetron；The transformation coil T1 also with transformation coil T3 magnetic couplings, institute
Transformation coil T3 is stated to be connected with magnetron heater.
As shown in Fig. 2 in the present embodiment, the driving synchronous circuit includes：Operational amplifier A 1, resistance R1, resistance
R2, resistance R3 and resistance R4, one end of the resistance R1 are connected with one end of the electric capacity Cr, one end of the resistance R3 and institute
State electric capacity Cr other end connection, one of the other end of the resistance R1 and the resistance R2 one end and operational amplifier A 1
Input is connected, and the other end of the resistance R3 connects with one end of the resistance R4 and another input of operational amplifier A 1
Connect, the other end of the resistance R2 and the resistance R4 other end are grounded, the output end of the operational amplifier A 1 with it is described
Single-chip microcomputer governor circuit is connected.
In the present embodiment, the resistance of the resistance R1 is that 940K Ω, the resistance R2 resistance are 880K Ω, the electricity
Resistance R3 resistance is that 5.6K Ω, the resistance R1 resistance are 5.4K Ω,
It should be noted that herein, term " comprising ", "comprising" or its any other variant are intended to non-row
His property is included, so that process, method, article or device including a series of key elements not only include those key elements, and
And also including other key elements 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
Also there is other identical element in process, method, article or the device of key element.
Preferred embodiment of the present utility model is these are only, the scope of the claims of the present utility model is not thereby limited, 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 fields, are similarly included in scope of patent protection of the present utility model.
Claims (9)
1. a kind of magnetron power source, it is characterised in that including：Main power circuit, single-chip microcomputer governor circuit, driving synchronous circuit and
IGBT drive circuit, the main power circuit passes through the driving synchronous circuit, IGBT drive circuit and the single-chip microcomputer master control
Circuit is connected；The main power circuit includes：Rectification circuit, LC filter circuits, LC resonance circuits, IGBT switches and voltage multiplying rectifier
Circuit, one end of the rectification circuit is connected with external power source, and the other end of the rectification circuit connects with the LC filter circuits
Connect, the LC resonance circuits are connected in parallel with the LC filter circuits again after being connected with IGBT switches, the LC resonance circuits
Coil and the coil magnetic coupling of the voltage doubling rectifing circuit；The driving synchronous circuit is used for the mistake for monitoring the LC resonance circuits
Zero point, so that the single-chip microcomputer governor circuit drives IGBT to switch by IGBT drive circuit.
2. a kind of magnetron power source according to claim 1, it is characterised in that also include：Voltage sampling circuit, electric current are adopted
Sample circuit, temperature sensing circuit, over-voltage detection circuit, auxiliary power supply circuit and panel communicating circuit, wherein, the voltage sample
Circuit is connected with the external power source, and the magnitude of voltage collected is sent into the single-chip microcomputer governor circuit；The electric current is adopted
Sample circuit is connected with IGBT switches, and the current value collected is sent into the single-chip microcomputer governor circuit；The temperature
Detection circuit is connected with the single-chip microcomputer governor circuit；The over-voltage detection circuit is connected with the LC resonance circuits, described auxiliary
Help power supply circuit and the external power source, single-chip microcomputer governor circuit, voltage sampling circuit, current sampling circuit and IGBT driving electricity
Road is connected；The panel communicating circuit is connected with the single-chip microcomputer governor circuit.
3. a kind of magnetron power source according to claim 2, it is characterised in that the rectification circuit includes：Bridge-type is connected
Diode D1, diode D2, diode D3 and diode D4, the positive pole of the diode D1 and diode D3 negative pole and institute
State one end connection of external power source, the positive pole of the diode D2 and diode D4 negative pole and the other end of the external power source
Connection.
4. a kind of magnetron power source according to claim 3, it is characterised in that the LC filter circuits include：Inductance Ls
With electric capacity Cs, one end of the inductance Ls is connected with the negative pole of the diode D1 and the negative pole of the diode D2, the electricity
The sense Ls other end is connected with one end of the electric capacity Cs, positive pole and institute of the other end of the electric capacity Cs with the diode D3
State diode D4 positive pole connection.
5. a kind of magnetron power source according to claim 4, it is characterised in that the LC resonance circuits include：Parallel connection is even
The electric capacity Cr and transformation coil T1 connect, one end of the electric capacity Cr and transformation coil T1 one end and the inductance Ls's is another
One end is connected, and the other end of the electric capacity Cr is connected with the other end of the transformation coil T1 and the IGBT source electrode switched.
6. a kind of magnetron power source according to claim 5, it is characterised in that the grid of the IGBT switches with it is described
IGBT drive circuit is connected；The drain electrode of the IGBT switches is connected with resistance Rs one end, the other end of the resistance Rs and institute
State the positive pole connection of diode D3 positive pole and the diode D4；The resistance Rs is in parallel with the current sampling circuit.
7. a kind of magnetron power source according to claim 6, it is characterised in that one end of the voltage doubling rectifing circuit passes through
Transformation coil T2 and the transformation coil T1 magnetic couplings, the other end of the voltage doubling rectifing circuit are connected with magnetron；It is described to become
Line ball circle T1 also with transformation coil T3 magnetic couplings, the transformation coil T3 is connected with magnetron heater.
8. a kind of magnetron power source according to claim 6, it is characterised in that the driving synchronous circuit includes：Computing
Amplifier A1, resistance R1, resistance R2, resistance R3 and resistance R4, one end of the resistance R1 are connected with one end of the electric capacity Cr,
One end of the resistance R3 is connected with the other end of the electric capacity Cr, one end of the other end of the resistance R1 and the resistance R2
And the input connection of operational amplifier A 1, the one end and operation amplifier of the other end of the resistance R3 with the resistance R4
Device A1 another input connection, the other end of the other end of the resistance R2 and the resistance R4 is grounded, and the computing is put
Big device A1 output end is connected with the single-chip microcomputer governor circuit.
9. a kind of magnetron power source according to claim 1, it is characterised in that the quantity of the IGBT switches is one.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720350061.XU CN206620068U (en) | 2017-04-05 | 2017-04-05 | A kind of magnetron power source |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201720350061.XU CN206620068U (en) | 2017-04-05 | 2017-04-05 | A kind of magnetron power source |
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| CN206620068U true CN206620068U (en) | 2017-11-07 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107070267A (en) * | 2017-04-05 | 2017-08-18 | 深圳戴普森新能源技术有限公司 | A kind of magnetron power source |
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- 2017-04-05 CN CN201720350061.XU patent/CN206620068U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107070267A (en) * | 2017-04-05 | 2017-08-18 | 深圳戴普森新能源技术有限公司 | A kind of magnetron power source |
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