CN101557663A - Magnetron driving power supply - Google Patents
Magnetron driving power supply Download PDFInfo
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- CN101557663A CN101557663A CNA2009100390139A CN200910039013A CN101557663A CN 101557663 A CN101557663 A CN 101557663A CN A2009100390139 A CNA2009100390139 A CN A2009100390139A CN 200910039013 A CN200910039013 A CN 200910039013A CN 101557663 A CN101557663 A CN 101557663A
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- 230000005611 electricity Effects 0.000 claims abstract description 8
- 239000003990 capacitor Substances 0.000 claims description 39
- 230000000087 stabilizing effect Effects 0.000 claims description 32
- 238000005070 sampling Methods 0.000 claims description 28
- 238000007493 shaping process Methods 0.000 claims description 21
- 238000001914 filtration Methods 0.000 claims description 16
- 230000009466 transformation Effects 0.000 claims description 4
- 238000001816 cooling Methods 0.000 abstract 2
- 238000011038 discontinuous diafiltration by volume reduction Methods 0.000 abstract 1
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- 230000033228 biological regulation Effects 0.000 description 4
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- 238000010438 heat treatment Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 238000005265 energy consumption Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 230000017525 heat dissipation Effects 0.000 description 1
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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
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- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
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Abstract
A magnetron driving power supply comprises a high-voltage three-phase generator set, more than one magnetron, filament transformers with the same number as the magnetrons, a rectification filter circuit and a pulse width modulation circuit, wherein high voltage electricity generated by the high-voltage three-phase generator set is input into the pulse width modulation circuit after passing through the rectification filter circuit, the high voltage electricity is respectively input into the magnetron and the filament transformers after being output by the pulse width modulation circuit, the filament transformers are input into the magnetron after being transformed by the magnetron, and the output current after passing through the pulse width modulation circuit is pulse current with a fixed periodic duty ratio. The invention adopts a high-voltage three-phase generator set, replaces a leakage inductance transformer by a rectifier filter circuit and a pulse width modulation circuit, can accurately control the current of the magnetron by the pulse width modulation circuit for controlling the current of the magnetron, does not need to additionally install cooling fins or other cooling equipment, and has the advantages of simple circuit structure, volume reduction, weight reduction and cost saving.
Description
Technical field
The present invention relates to a kind of magnetron drive power supply, particularly a kind of driving magnetron power supply that is used on bituminous pavement microwave heating equipment/car.
Background technology
Microwave technology has been applied in daily production of people or the life widely, and for example microwave degerming, microwave dryer are used for the microwave oven of food heating etc.Should satisfy the requirement of high voltage and constant current as the driving power of the needs of the microwave producing component magnetron on these microwave equipments, because these equipment all are to be fixed on particular place for a long time to carry out work basically, and employed magnetron equipment only has a spot of several on machinery equipment, its employed power supply is civil power or the power supply of three-phase generation unit of adopting civil power or the 380V of 220V, high voltage requirement to magnetron substantially all is to boost by transformer to realize, in Chinese patent literature CN 201167422Y a kind of magnetron operating apparatus is disclosed as our company, include supply unit and several magnetron devices, the output electrode of supply unit is connected with the transformer with plurality of voltages output; Several magnetron devices are connected on the several lead-out terminal of transformer, each magnetron device all is connected with and comprises piezo-resistance, the bridge rectifier that rectifier bridge is formed, wherein rectifier bridge lead-out terminal is electrically connected also all ground connection with the magnetron device shell, another lead-out terminal is electrically connected the back with a lead-out terminal of transformer and is connected with a terminal of magnetron device jointly, another lead-out terminal of transformer is connected with another terminal of magnetron device, it is together that piezo-resistance is connected rectifier bridge two lead-out terminals, an input terminal of each rectifier bridge all is connected with the positive pole of supply unit by switch, and another input terminal of rectifier bridge is connected with the negative pole of supply unit.This magnetron operating apparatus is in the process of boosting, transformer must produce the heat more than tens watts, the generation of these useless energy consumptions has reduced the utilance of electric energy, there are dozens of even up to a hundred magnetron devices to work simultaneously on the present bituminous pavement microwave heating equipment, to be 380V voltage that the three-phase generation unit is sent by transformer boost the power supply of magnetron again flows to magnetron after oversampling circuit pressure regulation filtering or pressure regulation filtering are boosted again, but no matter be that pressure regulation all will produce bigger energy waste after first pressure regulation is boosted or boosted earlier, also need to increase heat abstractor to distribute the heat that is produced in the transformation process fast for avoiding Yin Gaowen to reduce transformer performance simultaneously, this has not only increased the deployment cost of transformer and heat abstractor, taken the locus of bituminous pavement microwave heating equipment, and increased weight of equipment, also cause energy waste.
Summary of the invention
Purpose of the present invention aims to provide that a kind of energy consumption is low, volume is little, in light weight, the simple magnetron drive power supply of circuit, to overcome weak point of the prior art.
A kind of magnetron drive power supply by this purpose design, comprise high pressure three-phase generation unit, more than one magnetron reaches the filament transformer with the magnetron equal number, it is characterized in that magnetron drive power supply also comprises current rectifying and wave filtering circuit and pulse-width modulation circuit (30), the high-tension electricity that high pressure three-phase generation unit sends is input to pulse-width modulation circuit behind current rectifying and wave filtering circuit, be input to magnetron and filament transformer respectively after the pulse-width modulation circuit output, be input to magnetron after the filament transformer transformation again, become the pulse current of fixing change in duty cycle of cycle through the output current behind the pulse-width modulation circuit.
Described current rectifying and wave filtering circuit comprises diode D8, diode D9, diode D10, diode D11, diode D12, diode D13, capacitor C 5 and capacitor C 6, wherein, diode D8 and diode D11 series aiding connection, diode D9 and diode D12 series aiding connection, diode D10 and diode D13 series aiding connection, after in parallel with capacitor C 5 and capacitor C 6 respectively, three live wires of high pressure three-phase generation unit insert between diode D8 and the diode D11 respectively, between diode D9 and the diode D12, between diode D10 and the diode D13; The collector electrode of the anode of diode D8, diode D9 and diode D10 and the igbt in the pulse-width modulation circuit (IGBT) Q4 is connected, and the negative electrode of diode D11 and the grounding leg of magnetron are directly connected.
Described pulse-width modulation circuit comprises igbt (IGBT) Q4, voltage stabilizing circuit, booster circuit, drive circuit, shaping feedback circuit, programming device, condition indication circuit, current sampling circuit and ISP programmable device; Wherein, the emitter of igbt (IGBT) is connected with voltage stabilizing circuit, voltage stabilizing circuit is gone back respectively and current sampling circuit, booster circuit, the shaping feedback circuit, programming device, condition indication circuit connects, the output of current sampling circuit respectively with the shaping feedback circuit, magnetron is connected with filament transformer, the shaping feedback circuit is connected with programming device, booster circuit also is connected with programming device and drive circuit, drive circuit also connects igbt and programming device, and condition indication circuit is connected with programming device respectively with the ISP programmable device.
Described voltage stabilizing circuit comprises capacitor C 1 and diode D4 in parallel, the anode of diode D4 is connected and ground connection with resistance R 5 in the current sampling circuit, the negative electrode of diode D4 is connected with the output stage of igbt (IGBT) Q4, and is connected with inductance L 1, resistance R 9 in the programming device and capacitor C 4, the resistance R 11 in the condition indication circuit in the booster circuit
Described current sampling circuit comprises sampling resistor R5, and the end of sampling resistor R5 is connected with voltage stabilizing circuit, and its other end is connected with the resistance R 6 of magnetron and shaping feedback circuit
Described booster circuit comprises capacitor C 2, diode D2, inductance L 1, diode D3, resistance R 4 and triode Q5, the anode of diode D2 connects the negative electrode of the diode D4 in the voltage stabilizing circuit 301, the negative electrode that is connected diode D3 after capacitor C 2 and the diode D2 parallel connection, the anode of one terminating diode D2 of inductance L 1, its other end connects the anode of diode D3 and the collector electrode of triode Q5 respectively, the negative electrode of diode D3 connects the negative electrode of the diode D1 of drive circuit, the two ends of resistance R 4 are connected the grounded emitter of triode Q5 with the base stage of triode Q5 with programming device Programmable Logic Controller U1 signal output pin PA7 respectively.
Described shaping feedback circuit comprises resistance R 6, resistance R 7, resistance R 8 and inverter U2 and capacitor C 3, one end of resistance R 6 is connected with resistance R 5 in the current sampling circuit, the other end of resistance R 6 connects the inverting input of resistance R 7 and inverter U2 respectively, one end of resistance R 8 connects the other end of resistance R 7 and the output of inverter U2 respectively, the other end of resistance R 8 connects an end and the programming device Programmable Logic Controller U1 feedback signal input PA0 of capacitor C 3 respectively, the other end ground connection of capacitor C 3, the in-phase input end ground connection of inverter U2 also is connected with power input terminal, and another power input terminal of inverter U2 connects the negative electrode of the diode D4 in the voltage stabilizing circuit.
Described programming device comprises Programmable Logic Controller U1, resistance R 9, resistance R 10 and capacitor C 4, and programming device is determined the wiring requirement of Programmable Logic Controller U1 pin under pre-set program; The negative electrode of diode D4 in the one termination voltage stabilizing circuit of resistance R 9, the other end of resistance R 9 is connected with the PA2 pin of Programmable Logic Controller U1 and an end of resistance R 10 respectively, the other end of resistance R 10 connects GND pin and the ground connection of Programmable Logic Controller U1 respectively, one end ground connection of capacitor C 4, its other end is connected with the negative electrode of diode D4 in the power input VCC of Programmable Logic Controller U1 and the voltage stabilizing circuit respectively, the PB3 pin of Programmable Logic Controller U1, the PA4 pin, PA5 pin and PA6 pin connect 2 pin of ISP programmable device respectively, 3 pin, 4 pin and 5 pin, the PB2 pin of Programmable Logic Controller U1 and PA3 pin connect an end of the resistance R 12 and the resistance R 13 of condition indication circuit respectively, and the PB0 pin of Programmable Logic Controller U1 and PA1 pin are empty.
Described drive circuit comprises resistance R 1, triode Q1, triode Q2, triode Q3, resistance R 2, resistance R 3 and diode D1, the drive circuit signal input part PB1 of Programmable Logic Controller U1 in one end of resistance R 1 and the programming device is connected, the other end of resistance R 1 is connected with the base stage of triode Q3, the grounded emitter of triode Q3, the collector electrode of triode Q3 connects an end of base stage and the resistance R 2 of triode Q1 and triode Q2 respectively, the collector electrode of the other end of resistance R 2 and triode Q1, the negative electrode of the negative electrode of diode D1 and the diode D3 in the booster circuit connects, the emitter of triode Q1 connects the emitter of triode Q2 respectively, the grid of one end of the anode of diode D1 and resistance R 3 and igbt (IGBT) Q4, the collector electrode of another termination igbt (IGBT) of resistance R 3.
Described condition indication circuit comprises resistance R 11, resistance R 12, resistance R 13, lamp D5, lamp D6 and lamp D7, the minus earth of lamp D5, lamp D6 and lamp D7, its anode is connecting resistance R11, resistance R 12, resistance R 13 respectively, the negative electrode of diode D4 in another termination voltage stabilizing circuit of resistance R 11, the other end of resistance R 12 and resistance R 13 is connected with the PA3 pin with the PB2 pin of programming device Programmable Logic Controller U1 respectively, the 5V of 1 pin computer USB of ISP programmable device, 6 pin of ISP programmable device connect the ground of computer USB.
The present invention adopts high pressure three-phase generation unit, replaces leakage inductance transformer by current rectifying and wave filtering circuit and pulse-width modulation circuit, and the pulse-width modulation circuit of control magnetron current size can accurately be controlled the magnetron current size.The current value of magnetron has only the hundreds of milliampere, therefore, main power consumption device, the power consumption of igbt (IGBT) is less, the power consumption of The whole control circuit also has only several watts, do not need other finned or other heat dissipation equipment, have with respect to existing magnetron power source that power consumption is little, circuit structure is also simple, not only reduced volume, reduced weight, but also saved cost.
Description of drawings
Fig. 1 is the circuit block diagram of one embodiment of the invention.
Fig. 2 is the current rectifying and wave filtering circuit schematic diagram.
Fig. 3 is the pulse-width modulation circuit block diagram.
Fig. 4 is the pulse-width modulation circuit schematic diagram.
Fig. 5 is the voltage oscillogram of high-tension electricity between a, b of high pressure three-phase generation unit output
After Fig. 6 is the high-tension electricity process current rectifying and wave filtering circuit of high pressure three-phase generation unit output, the voltage oscillogram of between c, d, exporting.
After Fig. 7 is the high-tension electricity process pulse-width modulation circuit of high pressure three-phase generation unit output, the current waveform figure at the o place.
Among the figure: 10 is high pressure three-phase generation unit, and 20 is current rectifying and wave filtering circuit, and 30 is pulse-width modulation circuit, 40 is magnetron, and 50 is filament transformer, and 301 is voltage stabilizing circuit, 302 is booster circuit, and 303 is drive circuit, and 304 are the shaping feedback circuit, 305 is programming device, 306 is condition indication circuit, and 307 is current sampling circuit, and 308 is the ISP programmable device, U1 is a Programmable Logic Controller, and U2 is an inverter.
Embodiment
Below in conjunction with drawings and Examples the present invention is further described.
Referring to Fig. 1-Fig. 7, this magnetron drive power supply, comprise high pressure three-phase generation unit 10, current rectifying and wave filtering circuit 20, pulse-width modulation circuit 30 and more than one magnetron 40, filament transformer 50, the high-tension electricity that high pressure three-phase generation unit 10 sends is input to pulse-width modulation circuit 30 behind current rectifying and wave filtering circuit 20, be input to magnetron 40 and filament transformer 50 respectively after the pulse-width modulation circuit output, be input to magnetron after the filament transformer transformation again, become the cycle to fix through the output current behind the pulse-width modulation circuit 30, the pulse current of change in duty cycle.
Current rectifying and wave filtering circuit 20 comprises diode D8, diode D9, diode D10, diode D11, diode D12, diode D13, capacitor C 5 and capacitor C 6, see Fig. 2, diode D8 and diode D11 series aiding connection, diode D9 and diode D12 series aiding connection, diode D10 and diode D13 series aiding connection, after in parallel with capacitor C 5 and capacitor C 6 respectively, three live wire A, B of high pressure three-phase generation unit 10, C insert between diode D8 and the diode D11 respectively, between diode D9 and the diode D12, between diode D10 and the diode D13; The gate turn-on of the anode of diode D8, diode D9 and diode D10 and igbt (IGBT) Q4 in the pulse-width modulation circuit 30, the grounding leg of the negative electrode of the negative electrode of diode D11, diode D12 and the negative electrode of diode D13 and magnetron 40 is directly connected.
Pulse-width modulation circuit 30 comprises igbt (IGBT) Q4, voltage stabilizing circuit 301, booster circuit 302, drive circuit 303, shaping feedback circuit 304, programming device 305, condition indication circuit 306, current sampling circuit 307 and ISP programmable device 308; See Fig. 3, the emitter of insulated gate bipolar transistor IGBT is connected with voltage stabilizing circuit 301, voltage stabilizing circuit respectively also with current sampling circuit 307, booster circuit 302, shaping feedback circuit 304, programming device 305, condition indication circuit 306 connects, the output of current sampling circuit 307 is connected with magnetron 40 with shaping feedback circuit 304 respectively, shaping feedback circuit 304 is connected with programming device 305, booster circuit 302 also is connected with programming device 305 and drive circuit 303, drive circuit also connects igbt (IGBT) and programming device 305, and condition indication circuit 306 is connected with programming device 305 respectively with ISP programmable device 308.
Voltage stabilizing circuit 301 comprises capacitor C 1 and diode D4 in parallel, see Fig. 4, the anode of diode D4 is connected and ground connection with resistance R 5 in the current sampling circuit 307, the negative electrode of diode D4 is connected with the emitter of igbt (IGBT), and is connected with inductance L 1, resistance R 9 in the programming device 305 and capacitor C 4, the resistance R 11 in the condition indication circuit 306 in the booster circuit 302.
Current sampling circuit 307 comprises sampling resistor R5, sees Fig. 4, and the end of sampling resistor R5 is connected with voltage stabilizing circuit 301, and its other end is connected with magnetron 40.
Booster circuit 302 comprises capacitor C 2, diode D2, inductance L 1, diode D3, resistance R 4 and triode Q5, see Fig. 4, the anode of diode D2 connects the negative electrode of the diode D4 in the voltage stabilizing circuit 301, the negative electrode that is connected diode D3 after capacitor C 2 and the diode D2 parallel connection, the anode of one terminating diode D2 of inductance L 1, the other end of inductance L 1 connects the anode of diode D3 and the collector electrode of triode Q5 respectively, the negative electrode of diode D3 connects the negative electrode of the diode D1 in the drive circuit 303, the two ends of resistance R 4 respectively with the base stage of triode Q5 and programming device 305 in Programmable Logic Controller U1 signal output pin PA7 be connected the grounded emitter of triode Q5.
Shaping feedback circuit 304 comprises resistance R 6, resistance R 7, resistance R 8 and inverter U2 and capacitor C 3, see Fig. 4, one end of resistance R 6 is connected with resistance R 5 in the current sampling circuit 307, the other end of resistance R 6 connects the inverting input of resistance R 7 and inverter U2 respectively, one end of resistance R 8 connects the other end of resistance R 7 and the output of inverter U2 respectively, the other end of resistance R 8 connects Programmable Logic Controller U1 feedback signal input PA0 in end of capacitor C 3 and the programming device 305 respectively, the other end ground connection of capacitor C 3, the in-phase input end ground connection of inverter U2 also is connected with power input terminal, and another power input terminal of inverter U2 connects the negative electrode of the diode D4 in the voltage stabilizing circuit 301.
Programming device 305 comprises Programmable Logic Controller U1, resistance R 9, resistance R 10 and capacitor C 4, and Programmable Logic Controller U1 determines the wiring requirement of pin under pre-set program; See Fig. 4, the negative electrode of diode D4 in the one termination voltage stabilizing circuit 301 of resistance R 9, the other end of resistance R 9 is connected with the PA2 pin of Programmable Logic Controller U1 and an end of resistance R 10 respectively, the other end of resistance R 10 connects GND pin and the ground connection of Programmable Logic Controller U1 respectively, one end ground connection of capacitor C 4, its other end is connected with the negative electrode of diode D4 in the power input VCC of Programmable Logic Controller U1 and the voltage stabilizing circuit respectively, the PB3 pin of Programmable Logic Controller U1, the PA4 pin, PA5 pin and PA6 pin connect 2 pin of ISP programmable device 308 respectively, 3 pin, 4 pin and 5 pin, the PB2 pin of Programmable Logic Controller U1 and PA3 pin connect an end of the resistance R 12 and the resistance R 13 of condition indication circuit 306 respectively, and the PB0 pin of Programmable Logic Controller U1 and PA1 pin are empty.
Drive circuit 303 comprises resistance R 1, triode Q1, triode Q2, triode Q3, resistance R 2, resistance R 3 and diode D1, see Fig. 4, the drive circuit signal input part PB1 of Programmable Logic Controller U1 in one end of resistance R 1 and the programming device 305 is connected, the other end of resistance R 1 is connected with the base stage of triode Q3, the grounded emitter of triode Q3, the collector electrode of triode Q3 connects base stage and the base stage of triode Q2 and the end of resistance R 2 of triode Q1 respectively, the other end of resistance R 2 respectively with the collector electrode of triode Q1, the negative electrode of diode D3 in the negative electrode of diode D1 and the booster circuit 302 connects, the emitter of triode Q1 connects the emitter of triode Q2 respectively, the grid of one end of the anode of diode D1 and resistance R 3 and igbt (IGBT) Q4, the collector electrode of another termination igbt (IGBT) of resistance R 3.
Condition indication circuit 306 comprises resistance R 11, resistance R 12, resistance R 13, lamp D5, lamp D6 and lamp D7, see the minus earth of Fig. 4 lamp D5, lamp D6 and lamp D7, its anode is connecting resistance R11, resistance R 12, resistance R 13 respectively, the negative electrode of diode D4 in another termination voltage stabilizing circuit 301 of resistance R 11, the other end of resistance R 12 and resistance R 13 is connected with the PA3 pin with the PB2 pin of the Programmable Logic Controller U1 of programming device 305 respectively, 1 pin of ISP programmable device 308 meets the 5V of computer USB, and 6 pin of ISP programmable device connect the ground of computer USB.
Current rectifying and wave filtering circuit 20 in this magnetron drive power supply becomes the ac voltage signal of high pressure three-phase generation unit 10 output into d. c. voltage signal, by pulse-width modulation circuit 30 direct current is converted to the pulse current of fixing change in duty cycle of cycle of satisfying magnetron 40 job requirements then.Drive circuit 303 in the pulse-width modulation circuit 30 is used to control the work of igbt (IGBT), the work of promptly controlling magnetron 40 with stop.Resistance R 5 in the current sampling circuit 307 can be obtained the current signal of magnetron 40, with after the feedback signal shaping, offers programming device 305 through shaping feedback circuit 304.Voltage stabilizing circuit 301 obtains 5V voltage and offers programming device 305, shaping feedback circuit 304, condition indication circuit 306 and booster circuit 302 as power supply on major loop, booster circuit 302 offers drive circuit 303 as power supply after voltage is risen to 15V, and provides voltage boosting pulse by programming device 305.Current value of setting in the comparison program of programming device 305 and magnetron 40 current values of sampling and obtaining, export certain duty ratio pulse width signal control igbt (IGBT) conducting and end, its objective is that magnetron 40 current values that the current value set in the program that makes programming device 305 and sampling are obtained equate, just do not change duty ratio and make it equal if do not wait.Whether lamp D5 indication power work in the condition indication circuit 306, when this lamp D5 is bright, the expression power supply is normal, whether lamp D6 indication magnetron 40 in the condition indication circuit 306 works, D6 is bright when this lamp, and expression magnetron 40 is working properly, and whether the lamp D7 indication moding of a magnetron in the condition indication circuit 306, when this lamp D7 is bright, expression magnetron 40 mode hoppings.
Duty ratio is meant pulse takies in one section stream time time and the ratio of total time.
Claims (10)
1. magnetron drive power supply, comprise high pressure three-phase generation unit (10), more than one magnetron (40) reaches the filament transformer (50) with the magnetron equal number, it is characterized in that magnetron drive power supply also comprises current rectifying and wave filtering circuit (20) and pulse-width modulation circuit (30), the high-tension electricity that high pressure three-phase generation unit sends is input to pulse-width modulation circuit behind current rectifying and wave filtering circuit, be input to magnetron and filament transformer respectively after the pulse-width modulation circuit output, be input to magnetron after the filament transformer transformation again, become the pulse current of fixing change in duty cycle of cycle through the output current behind the pulse-width modulation circuit.
2. magnetron drive power supply according to claim 1, it is characterized in that described current rectifying and wave filtering circuit (20) comprises diode D8, diode D9, diode D10, diode D11, diode D12, diode D13, capacitor C 5 and capacitor C 6, wherein, diode D8 and diode D11 series aiding connection, diode D9 and diode D12 series aiding connection, diode D10 and diode D13 series aiding connection, after in parallel with capacitor C 5 and capacitor C 6 respectively, three live wire (A of high pressure three-phase generation unit (10), B, C) insert respectively between diode D8 and the diode D11, between diode D9 and the diode D12, between diode D10 and the diode D13; The collector electrode of igbt (IGBT) Q4 in the anode of diode D8, diode D9 and diode D10 and the pulse-width modulation circuit (30) is connected, and the grounding leg of the negative electrode of diode D11 and magnetron (40) is directly connected.
3. magnetron drive power supply according to claim 1 and 2 is characterized in that described pulse-width modulation circuit (30) comprises igbt (IGBT) Q4, voltage stabilizing circuit (301), booster circuit (302), drive circuit (303), shaping feedback circuit (304), programming device (305), condition indication circuit (306), current sampling circuit (307) and ISP programmable device (308); Wherein, the emitter of igbt (IGBT) is connected with voltage stabilizing circuit, voltage stabilizing circuit is gone back respectively and current sampling circuit, booster circuit, the shaping feedback circuit, programming device, condition indication circuit connects, the output of current sampling circuit respectively with the shaping feedback circuit, magnetron (40) is connected with filament transformer (50), the shaping feedback circuit is connected with programming device, booster circuit also is connected with programming device and drive circuit, drive circuit also connects igbt and programming device, and condition indication circuit is connected with programming device respectively with the ISP programmable device.
4. magnetron drive power supply according to claim 3, it is characterized in that described voltage stabilizing circuit (301) comprises capacitor C 1 and diode D4 in parallel, the anode of diode D4 is connected and ground connection with resistance R 5 in the current sampling circuit (307), the negative electrode of diode D4 is connected with the output stage of igbt (IGBT) Q4, and is connected with inductance L 1, resistance R 9 in the programming device (305) and capacitor C 4, the resistance R 11 in the condition indication circuit (306) in the booster circuit (302).
5. magnetron drive power supply according to claim 4, it is characterized in that described current sampling circuit (307) comprises sampling resistor R5, the end of sampling resistor R5 is connected with voltage stabilizing circuit (301), and its other end is connected with the resistance R 6 of magnetron (40) with shaping feedback circuit (304).
6. magnetron drive power supply according to claim 3, it is characterized in that described booster circuit (302) comprises capacitor C 2, diode D2, inductance L 1, diode D3, resistance R 4 and triode Q5, the anode of diode D2 connects the negative electrode of the diode D4 in the voltage stabilizing circuit 301, the negative electrode that is connected diode D3 after capacitor C 2 and the diode D2 parallel connection, the anode of one terminating diode D2 of inductance L 1, its other end connects the anode of diode D3 and the collector electrode of triode Q5 respectively, the negative electrode of diode D3 connects the negative electrode of the diode D1 of drive circuit (303), the two ends of resistance R 4 are connected the grounded emitter of triode Q5 with the base stage of triode Q5 with programming device (305) Programmable Logic Controller U1 signal output pin PA7 respectively.
7. magnetron drive power supply according to claim 3, it is characterized in that described shaping feedback circuit (304) comprises resistance R 6, resistance R 7, resistance R 8 and inverter U2 and capacitor C 3, one end of resistance R 6 is connected with resistance R 5 in the current sampling circuit (307), the other end of resistance R 6 connects the inverting input of resistance R 7 and inverter U2 respectively, one end of resistance R 8 connects the other end of resistance R 7 and the output of inverter U2 respectively, the other end of resistance R 8 connects an end and programming device (305) the Programmable Logic Controller U1 feedback signal input PA0 of capacitor C 3 respectively, the other end ground connection of capacitor C 3, the in-phase input end ground connection of inverter U2 also is connected with power input terminal, and another power input terminal of inverter U2 connects the negative electrode of the diode D4 in the voltage stabilizing circuit (301).
8. according to claim 3,6 or 7 described magnetron drive power supplies, it is characterized in that described programming device (305) comprises Programmable Logic Controller U1, resistance R 9, resistance R 10 and capacitor C 4, programming device is determined the wiring requirement of Programmable Logic Controller U1 pin under pre-set program; The negative electrode of diode D4 in the one termination voltage stabilizing circuit (301) of resistance R 9, the other end of resistance R 9 is connected with the PA2 pin of Programmable Logic Controller U1 and an end of resistance R 10 respectively, the other end of resistance R 10 connects GND pin and the ground connection of Programmable Logic Controller U1 respectively, one end ground connection of capacitor C 4, its other end is connected with the negative electrode of diode D4 in the power input VCC of Programmable Logic Controller U1 and the voltage stabilizing circuit respectively, the PB3 pin of Programmable Logic Controller U1, the PA4 pin, PA5 pin and PA6 pin connect 2 pin of ISP programmable device (308) respectively, 3 pin, 4 pin and 5 pin, the PB2 pin of Programmable Logic Controller U1 and PA3 pin connect an end of the resistance R 12 and the resistance R 13 of condition indication circuit (306) respectively, and the PB0 pin of Programmable Logic Controller U1 and PA1 pin are empty.
9. according to claim 3 or 6 described magnetron drive power supplies, it is characterized in that described drive circuit (303) comprises resistance R 1, triode Q1, triode Q2, triode Q3, resistance R 2, resistance R 3 and diode D1, the drive circuit signal input part PB1 of Programmable Logic Controller U1 in one end of resistance R 1 and the programming device (305) is connected, the other end of resistance R 1 is connected with the base stage of triode Q3, the grounded emitter of triode Q3, the collector electrode of triode Q3 connects an end of base stage and the resistance R 2 of triode Q1 and triode Q2 respectively, the collector electrode of the other end of resistance R 2 and triode Q1, the negative electrode of diode D3 in the negative electrode of diode D1 and the booster circuit (302) connects, the emitter of triode Q1 connects the emitter of triode Q2 respectively, the grid of one end of the anode of diode D1 and resistance R 3 and igbt (IGBT) Q4, the collector electrode of another termination igbt (IGBT) of resistance R 3.
10. according to claim 3 or 4 described magnetron drive power supplies, it is characterized in that described condition indication circuit (306) comprises resistance R 11, resistance R 12, resistance R 13, lamp D5, lamp D6 and lamp D7, lamp D5, the minus earth of lamp D6 and lamp D7, its anode is connecting resistance R11 respectively, resistance R 12, resistance R 13, the negative electrode of diode D4 in another termination voltage stabilizing circuit (301) of resistance R 11, the other end of resistance R 12 and resistance R 13 is connected with the PA3 pin with the PB2 pin of programming device (305) Programmable Logic Controller U1 respectively, the 5V of 1 pin computer USB of ISP programmable device (308), 6 pin of ISP programmable device connect the ground of computer USB.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2009100390139A CN101557663B (en) | 2009-04-23 | 2009-04-23 | Magnetron driving power supply |
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| CN2009100390139A CN101557663B (en) | 2009-04-23 | 2009-04-23 | Magnetron driving power supply |
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| CN101557663A true CN101557663A (en) | 2009-10-14 |
| CN101557663B CN101557663B (en) | 2011-07-27 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108988638A (en) * | 2017-06-01 | 2018-12-11 | 关英怀 | The anti-mode hopping anode supply of microwave therapy apparatus magnetron controllable constant-current |
| CN109300754A (en) * | 2018-11-24 | 2019-02-01 | 芜湖国睿兆伏电子有限公司 | A kind of control system of Vacuum Magnetic keyholed back plate |
| CN114007293A (en) * | 2021-10-20 | 2022-02-01 | 成都利尼科医学技术发展有限公司 | Magnetron filament heating current control system |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4912581B2 (en) * | 2004-10-18 | 2012-04-11 | パナソニック株式会社 | High frequency heating device |
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2009
- 2009-04-23 CN CN2009100390139A patent/CN101557663B/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108988638A (en) * | 2017-06-01 | 2018-12-11 | 关英怀 | The anti-mode hopping anode supply of microwave therapy apparatus magnetron controllable constant-current |
| CN109300754A (en) * | 2018-11-24 | 2019-02-01 | 芜湖国睿兆伏电子有限公司 | A kind of control system of Vacuum Magnetic keyholed back plate |
| CN114007293A (en) * | 2021-10-20 | 2022-02-01 | 成都利尼科医学技术发展有限公司 | Magnetron filament heating current control system |
| CN114007293B (en) * | 2021-10-20 | 2024-03-29 | 成都利尼科医学技术发展有限公司 | Magnetron filament heating current control system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101557663B (en) | 2011-07-27 |
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