CN200983685Y - Driving power supply of magnetic control tube - Google Patents
Driving power supply of magnetic control tube Download PDFInfo
- Publication number
- CN200983685Y CN200983685Y CNU2006200147011U CN200620014701U CN200983685Y CN 200983685 Y CN200983685 Y CN 200983685Y CN U2006200147011 U CNU2006200147011 U CN U2006200147011U CN 200620014701 U CN200620014701 U CN 200620014701U CN 200983685 Y CN200983685 Y CN 200983685Y
- Authority
- CN
- China
- Prior art keywords
- transformer
- circuit
- power supply
- switching tube
- diode
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Images
Classifications
-
- 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
Abstract
The utility model discloses a magnetron driving power source, which comprises a power supply terminal, a high-voltage circuit connected with the power supply terminal, a first logic control circuit which controls the high-voltage circuit, a filament circuit connected with the power supply terminal, and a second logic control circuit which controls the filament circuit. Using the proposal of the separation of the filament circuit and the high-voltage circuit, the utility model has the advantages of high adaptability to magnetron, and cost reduction with single tube using high-tension circuit.
Description
Technical field
The utility model relates to the power conversion technology, relates in particular to a kind of high frequency switch power and control method thereof to the magnetron power supply.
Background technology
Magnetron can be transformed into microwave energy with direct current energy, is the core devices of microwave oven.Magnetron drive power supply becomes direct current energy to daily AC energy, for the work of microwave tube creates conditions.Magnetron cathode is the emitter of electronics, and continuous wave magnetron is used direct-heated cathode always, and it is by tungsten filament or the helically shaped filament of pure tungsten filament winding, and galvanization just has electron emission ability after being heated to set point of temperature.This negative electrode heating current is big, and negative electrode connects negative high voltage during magnetron work.The performance of negative electrode is very big to the operating characteristic and the life-span influence of pipe, is regarded as the heart of whole pipe.For preventing, should reduce cathode current behind the magnetron working stability in accordance with regulations to increase the service life because of electron back bombardment makes anode overheated.
Traditional magnetron drive power supply is that Industrial Frequency Transformer drives, its power is out of contior, and wasted ample resources, also can only adopt time break-make control to the control of microwave power, realize power adjustments, therefore adopt high frequency switch power that there are a lot of researchs magnetron power supply aspect for many years, number is the magnetron drive power supply of CN98802817.4 as MAT in Chinese patents, as shown in Figure 1, this power supply adopts heater chain and the integrated scheme of high-tension circuit, filament supply and high voltage source adopt same transformer-supplied, its control is adopted and is decided service time, become the mode power controlling of turn-off time, can realize power adjustments, but there are the following problems: 1, two switching tube stress differences, because voltage clamp when adopting a switching tube to carry out the main switch shutoff, to prevent the main switch overvoltage, main cause is in start process, output voltage reaches about 7KV, and when the magnetron operate as normal its voltage about 4KV, therefore after the power supply start, in the magnetron start-up course, the main switch due to voltage spikes is very high.2, output diode stress difference, particularly when the heater chain loose contact, there is the danger of over-voltage breakdown in the output high-voltage diode when high-tension circuit loose contact or open circuit; 3, power regulating range limited (in the reality 50%～100% range regulation).4, Zui Da problem, because high-tension circuit and heater chain are integrated, this power requirement magnetron heater circuit induction reactance is less, the variation of heater current within the range of permission when carrying out variable frequency control with assurance, make the variable frequency power supply of Panasonic can only adopt the high frequency magnetron of Panasonic, so just the application to Switching Power Supply has caused obstacle, has hindered the development in market.
Traditional magnetron drive power supply adopts biswitch control, and its cost is higher, and its control method is more complicated also, has influenced popularizing and developing of market.
The utility model content
The purpose of this utility model is to provide a kind of magnetron drive power supply, can be applicable to different magnetrons, and realizes improving reliability by multiple protective.
The further purpose of the utility model is to provide a kind of single switch tubular type magnetron drive power supply and control method, can reduce cost, and is fit to popular the application.
The technical solution of the utility model is as follows:
A kind of magnetron drive power supply, comprise power end, the high-tension circuit that is connected with power end, high-tension circuit is carried out first logic control circuit of controlling and driving, it is characterized in that: also comprise heater chain, its input is connected with described power end, and comprises second logic control circuit that heater chain is carried out controlling and driving.
The utility model further improves and is: described high-tension circuit comprises the current rectifying and wave filtering circuit that connects in turn, resonance branch road and the switching tube that comprises the former limit of transformer, the secondary output of transformer.
The utility model further improves and is: described resonance branch road comprises the former limit and the electric capacity of transformer parallel with one another, is in series with switching tube behind the resonance branch road after the parallel connection.
The utility model further improves and is: described resonance branch road comprises the former limit and the electric capacity of the transformer of mutual series connection, and electric capacity and switching tube are in parallel.
The utility model further improves and is: described transformer secondary output circuit comprises: the negative electrode of the 6th diode is connected with the anode of the 5th diode; The negative electrode output of the 5th diode; The anode of the 6th diode connects output; Be connected in the two ends of the 5th diode and the 6th diode after the 5th electric capacity and the 6th capacitances in series; Transformer secondary one end links to each other with the tie point of two diodes, and the other end links to each other with the tie point of two electric capacity;
Perhaps
Described transformer secondary output circuit comprises: connecting in turn after the series arm of electric capacity and diode is in parallel with the transformer secondary; The negative electrode of diode and anode are two outputs.
The utility model further improves and is: described heater chain is the half-bridge resonance circuit, comprise the switching tube branch road that connects in turn by second switch pipe, the 3rd switching tube and resistance, the former limit of transformer and electric capacity are in parallel with the 4th switching tube after connecting into the resonance branch road, the secondary output of transformer.
The utility model further improves and is: described heater chain is the single tube resonant circuit, comprises the switching tube branch road that single switching transistor is formed, and the former limit and the electric capacity of transformer is connected with switching tube after connecting into the resonance branch road, the secondary output of transformer.
The utility model is by separating the power source design of heater chain and high-tension circuit; can be applicable to different magnetrons; the magnetron of particularly common employing Industrial Frequency Transformer power supply can use this Switching Power Supply to realize driving magnetron without any transformation; and can realize any control of the carrying out of input power less than maximum power; and realize that heater current is little; multiple protectives such as output high pressure overvoltage improve reliability.High-tension circuit adopts single tube, has reduced cost, has vast market prospect.
Description of drawings
Fig. 1 is the integrated power supply scheme of PANASONIC in the background technology;
Fig. 2 is the high-pressure section circuit theory diagrams;
Fig. 3 is the circuit theory diagrams of high-pressure section resonant capacitance ground connection;
Fig. 4 A adopts the circuit theory diagrams of single tube voltage multiplying rectifier mode for output;
Fig. 4 B adopts another circuit theory diagrams of single tube voltage multiplying rectifier mode for output;
Fig. 5 is the control principle block diagram of high-tension circuit;
The voltage oscillogram of switching tube when Fig. 6 is Fig. 5 circuit working;
Fig. 7 is for adopting the heater chain figure of half-bridge resonance;
Fig. 8 is for adopting the heater chain figure of single tube resonance.
Embodiment
Below in conjunction with the drawings and specific embodiments the utility model is further elaborated:
Basic ideas of the present utility model are: magnetron drive power supply, comprise heater chain and high-tension circuit, and adopt independently power supply respectively; Wherein high-tension circuit adopts the LLC controlled resonant converter.Heater chain can adopt the mode of half-bridge resonance or single tube resonance, and half-bridge resonance is by the adjusting of by-pass cock frequency realization to electric current, and the single tube scheme is controlled heater current by regulating service time.
High-pressure section main circuit of the present utility model is seen Fig. 2.As shown in the figure, the interchange of input or direct current are after rectifier bridge 101 rectifications, after inductance L 1 and capacitor C 1 filtering, export, the feature of this filter circuit is that wherein capacitor C 1 does not adopt big electrochemical capacitor to carry out flat ripple to handle, therefore with common converter bigger difference is arranged, if for exchanging input, filtered voltage is the pulsating wave after the rectification.Filtered voltage is supplied with the single tube controlled resonant converter, for dwindling the volume of converter, resonant inductance can be integrated in the transformer, and for realizing the isolation of former secondary, transformer adopting is divided the method for groove coiling in this circuit, there is big leakage inductance in therefore former secondary, this leakage inductance participates in circuit working as the resonant inductance of circuit, and there is air gap on the former limit of transformer simultaneously, and therefore the collection magnetoelectricity sense of former limit is less, also can participate in circuit working, so this transformer has been realized the function of integrated leakage inductance and magnetizing inductance.This controlled resonant converter is a LLC converter.Physical circuit comprises the former limit L2 and the switching tube Q1 of the transformer that connects in turn, the L2 parallel connection of the former limit of capacitor C 2 and transformer.
The transformer secondary circuit is as follows: the negative electrode of the 6th diode D6 is connected with the anode of the 5th diode D5; The negative electrode of the 5th diode D5 connects the anode of magnetron; The anode of the 6th diode D6 connects the negative electrode (glower end) of magnetron; Be connected in the two ends of the 5th diode D5 and the 6th diode D6 after the 5th capacitor C 5 and 6 series connection of the 6th capacitor C.Transformer secondary L3 one end links to each other with the tie point of two diodes, and the other end links to each other with the tie point of two electric capacity.
Wherein resonant capacitance also can connect to Fig. 3 mode, and promptly resonant capacitance C202 is in parallel with switching tube Q1.
On the basis of Fig. 2 and high-tension circuit shown in Figure 3, the output of transformer secondary can be adopted the multiplication of voltage mode of single tube rectification, so circuit can develop into the dual mode of Fig. 4 A and Fig. 4 B.The concrete connected mode of secondary single tube rectification circuit is: transformer secondary L3 and diode D7, capacitor C 7 connect into the closed-loop path in turn, and the anode of magnetron is connected with the negative electrode of diode D7, and the negative electrode of magnetron is connected with the anode of diode D7.
The drawn control circuit of switching tube Q1 of Fig. 5, switching tube both end voltage waveform when Fig. 6 works for switching tube.Circuit control circuit operation principle is described as follows:
The FEEDBACK CONTROL chip can adopt as IR2153, and the similar chip of L6569 or other realizes, by detecting primary current and input voltage value, regulate computing by computing circuit 102 after, according to output by-pass cock frequency as a result.Variable frequency control is adopted in control, by the adjusting of control circuit, and automatic adaptive circuit parameter, the control circuit operation result has determined the service time of switching tube, the turn-off time of switching tube is determined by main circuit parameter.Switching tube closes has no progeny the former limit of transformer leakage inductance, former limit magnetizing inductance, secondary voltage and resonant capacitance carry out parallel resonance, when resonance potential resonance when the switching tube both end voltage is lower than inlet highway voltage certain value, switching tube is conducting once more, ON time is determined by feedback result.Therefore the control to this converter is to be determined by the main circuit operating state turn-off time basically, regulate by changing switching tube service time, in a switch periods, power output is little during service time short (switching frequency height), power output is big during service time long (switching frequency is low), therefore the by-pass cock frequency can be controlled the power output size.Generally under than the heavy load situation, can realize that switching tube both end voltage resonance is to zero, can realize that no-voltage is open-minded this moment, simultaneously owing to adopt bigger resonant capacitance, the switching tube both end voltage rises slowlyer during shutoff, is equivalent to no-voltage this moment and turn-offs, therefore this circuit can be realized main switch no-voltage turn-on and turn-off, can raise the efficiency, improve the EMI performance, reduce interference electrical network.
Magnetron drive power supply described in the utility model can be realized the convenient of high-pressure section input power controlled by given variation, thereby realize control to microwave power, specifically when input voltage changes, can be by suitable control, make input power basicly stable, thereby guarantee that the output microwave power is basicly stable.
Heater chain can adopt half-bridge resonance or single tube resonance scheme, and its realization and principle Analysis are as follows:
Heater chain adopts half-bridge resonance circuit and control principle as shown in Figure 7.Main circuit is: the interchange of input or direct current are exported after inductance L 9 and capacitor C 9 filtering after the rectifier bridge rectification.Filtered voltage is supplied with half bridge resonant transformer, and for dwindling the volume of converter, resonant inductance can be integrated in the transformer, utilizes transformer leakage inductance as resonant inductance.Physical circuit comprises second switch pipe Q2, the 3rd switching tube Q3 that connects in turn, current sampling resistor R, and the former limit L4 of transformer and capacitor C 401 are in parallel with the 3rd switching tube Q3 after being connected into the resonance branch road.
The output of transformer secondary connects the filament of magnetron.
Can adopt the similar control chip of IR2153 or L6569 or other in the control circuit, these chips are integrated to be driven and PWM generation function, for realizing Current Control, current feedback loop by resistance R is arranged in the circuit, resistance value when the control capacitance as a result of current feedback is discharged, thereby made for the 3rd switching tube Q3 service time fix, second switch pipe Q2 service time changes with feedback, it is constant that this circuit and control can be controlled heater current, by given variation, promptly by bigger electric current set-point of given when start, less current set-point after the operate as normal, can be implemented in when start with bigger current flow heats filament, during operate as normal with constant current work, thereby guarantee to open fast the reliability of machine and work.
Filament single tube resonant circuit and control principle are as shown in Figure 8.Main circuit is: the interchange of input or direct current are exported after inductance L 9 and capacitor C 9 filtering after the rectifier bridge rectification.Filtered voltage is supplied with the single tube controlled resonant converter, and for dwindling the volume of converter, resonant inductance can be integrated in the transformer, utilizes transformer leakage inductance as resonant inductance.Physical circuit comprises single switching tube Q4, the former limit L4 of transformer and capacitor C 402 and be unified into the resonance branch road after connect with switching tube Q4.Feedback and control circuit detect electric current and carry out FEEDBACK CONTROL, determine ON time according to feedback result, the while control circuit is sense switch pipe both end voltage and input voltage automatically, the assurance voltage resonance is opened switching tube Q4 when resonant inductance L4 both end voltage is lower than input voltage, can reduce turn-on consumption like this, raise the efficiency, by suitable control, can realize when the switching tube both end voltage is zero open-minded, thereby realize that no-voltage is open-minded; It is constant that this same circuit and control can be controlled heater current.Feedback among the figure and control circuit carry out feedback regulation, determine the service time of switching tube; The turn-off time of switching tube is determined by main circuit parameter.By given variation, promptly by bigger electric current set-point of given when start, less current set-point after the operate as normal, main circuit parameter and control circuit parameter suitably are set, can guarantee has bigger electric current to heat when magnetron starts, guarantee the magnetron reliably working with less constant current after the operate as normal, thereby guarantee to open fast the reliability of machine and work.By suitable logic control, can realize that heater current is low excessively, the input overcurrent, the high pressure overvoltage, protections such as radiator excess temperature, thus improve reliability.
Aforesaid main circuit and control method can be applied under the direct current input condition, and can cancel the input rectifying bridge this moment, or keep the input rectifying bridge as preventing the input inversion function.
Magnetron drive power supply described in the utility model because heater chain and high-tension circuit are separately, therefore has very strong adaptability, when the magnetron parameter of different manufacturers or different batches during in the certain limit deviation, still can guarantee the operate as normal of magnetron.
Claims (8)
1, a kind of magnetron drive power supply, comprise power end, the high-tension circuit that is connected with power end, high-tension circuit is carried out first logic control circuit of controlling and driving, it is characterized in that: also comprise heater chain, its input is connected with described power end, and comprises second logic control circuit that heater chain is carried out controlling and driving.
2, magnetron drive power supply according to claim 1 is characterized in that: described high-tension circuit comprises current rectifying and wave filtering circuit, the resonance branch road that comprises the former limit of transformer and the switching tube (Q1) that connects in turn, the secondary output of transformer.
3, magnetron drive power supply according to claim 2 is characterized in that: described resonance branch road comprises the former limit (L2) and the electric capacity (C2) of transformer parallel with one another, is in series with switching tube (Q1) behind the resonance branch road after the parallel connection.
4, magnetron drive power supply according to claim 2 is characterized in that: described resonance branch road comprises the former limit (L2) and the electric capacity (C202) of the transformer of mutual series connection, and electric capacity (C202) is in parallel with switching tube (Q1).
5, according to the described magnetron drive power supply of 2 to 4 arbitrary claims, it is characterized in that: described transformer secondary output circuit comprises: the negative electrode of the 6th diode (D6) is connected with the anode of the 5th diode (D5); The negative electrode output of the 5th diode (D5); The anode of the 6th diode (D6) connects output; Be connected in the two ends of the 5th diode (D5) and the 6th diode (D6) after the 5th electric capacity (C5) and the 6th electric capacity (C6) series connection; Transformer secondary (L3) end links to each other with the tie point of two diodes, and the other end links to each other with the tie point of two electric capacity;
6, according to the described magnetron drive power supply of 2 to 4 arbitrary claims, it is characterized in that:
Described transformer secondary output circuit comprises: connecting in turn after the series arm of electric capacity (C7) and diode (D7) is in parallel with transformer secondary (L3); The negative electrode of diode (D7) and anode are two outputs.
7, magnetron drive power supply according to claim 1, it is characterized in that: described heater chain is the half-bridge resonance circuit, comprise the switching tube branch road that connects in turn by second switch pipe (Q2), the 3rd switching tube (Q3) and resistance (R), the former limit (L4) of transformer and electric capacity (C401) are in parallel with the 4th switching tube (Q4) after connecting into the resonance branch road, the secondary output of transformer.
8, magnetron drive power supply according to claim 1, it is characterized in that: described heater chain is the single tube resonant circuit, comprise the switching tube branch road that single switching transistor (Q4) is formed, the former limit (L4) of transformer be connected the secondary output of transformer after electric capacity (C402) connects into the resonance branch road with switching tube (Q4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2006200147011U CN200983685Y (en) | 2006-09-13 | 2006-09-13 | Driving power supply of magnetic control tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2006200147011U CN200983685Y (en) | 2006-09-13 | 2006-09-13 | Driving power supply of magnetic control tube |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN200983685Y true CN200983685Y (en) | 2007-11-28 |
Family
ID=38910834
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2006200147011U Expired - Lifetime CN200983685Y (en) | 2006-09-13 | 2006-09-13 | Driving power supply of magnetic control tube |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN200983685Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101106846B (en) * | 2006-09-13 | 2011-09-21 | 阮世良 | A driving power and control method for magnetic control tube |
| CN101072462B (en) * | 2006-09-13 | 2012-05-30 | 阮世良 | Magnetron driving power supply and control method |
| CN102480247A (en) * | 2010-11-25 | 2012-05-30 | 合肥雷科电子科技有限公司 | Power source device for pulse magnetron transmitter |
-
2006
- 2006-09-13 CN CNU2006200147011U patent/CN200983685Y/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101106846B (en) * | 2006-09-13 | 2011-09-21 | 阮世良 | A driving power and control method for magnetic control tube |
| CN101072462B (en) * | 2006-09-13 | 2012-05-30 | 阮世良 | Magnetron driving power supply and control method |
| CN102480247A (en) * | 2010-11-25 | 2012-05-30 | 合肥雷科电子科技有限公司 | Power source device for pulse magnetron transmitter |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101106846B (en) | A driving power and control method for magnetic control tube | |
| CN101072462B (en) | Magnetron driving power supply and control method | |
| Wang et al. | A single-stage LED driver based on BCM boost circuit and $ LLC $ converter for street lighting system | |
| CN108512431A (en) | Double rectification alternating expression full-bridge single stage power factor correction power circuits and control method | |
| CN107968471B (en) | LCLC resonance circuit, wide-range constant-power output direct-current charger and control method | |
| CN107509280A (en) | A kind of high-frequency isolation type LED drive circuit and its control method | |
| CN102752929A (en) | High-power factor LED (light-emitting diode) driving circuit supporting silicon controlled rectifier dimming | |
| CN103841702A (en) | LED drive circuit and LED drive method | |
| CN115642805A (en) | ZVS-based six-switch buck-boost converter | |
| CN200983685Y (en) | Driving power supply of magnetic control tube | |
| CN101646280A (en) | LED high-voltage energy-saving power supply | |
| CN104065283B (en) | No bridge type PFC AC DC supply convertors | |
| CN1109654A (en) | Combined control inverse method of pulse width modulation and zero current zero voltage harmonic switch | |
| CN109005623A (en) | High Power Factor Dimmable LED street lamp driving power based on flyback converter | |
| CN102647100B (en) | Integrated Buck-flyback high power factor converter | |
| CN102684492A (en) | High power factor converter | |
| CN110289755B (en) | DCM Buck-Flyback PFC converter with high power factor | |
| CN111884514A (en) | Positive and negative excitation type switching power supply circuit and control method thereof | |
| CN101924481B (en) | PFC (Power Factor Correction) rectifier circuit | |
| CN2645335Y (en) | PWM pulse width modulation synchronous rectification D.C. transformer with frequency forward-feed compensation circuit | |
| CN211152285U (en) | L ED constant current drive circuit through LL C resonance control | |
| CN209488454U (en) | Booster circuit and power supply | |
| CN1665115A (en) | A high-efficiency zero-voltage switch type DC power transformer | |
| CN2904466Y (en) | Synchronous rectifier circuit for current transformer control | |
| CN1436029A (en) | Device and method for light-modulating control of fluorescent lamp |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: SHENZHEN GOSPELL ELECTRIC TECHNOLOGY CO., LTD. Free format text: FORMER OWNER: RUAN SHILIANG Effective date: 20120227 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 518057 SHENZHEN, GUANGDONG PROVINCE TO: 518035 SHENZHEN, GUANGDONG PROVINCE |
|
| TR01 | Transfer of patent right |
Effective date of registration: 20120227 Address after: 518035 Guangdong Province, Baoan District Xixiang street Shenzhen city building on the south side of Tian Yi Lu Bao Phoenix Gang first industrial zone A building 05 floor on the eastern side Patentee after: Shenzhen Gospell Electric Technology Co., Ltd. Address before: 518057, Shenzhen, Guangdong province Nanshan District science and technology south road Granville new software park, building 1, 4 floor, East Wing Patentee before: Ruan Shiliang |
|
| CX01 | Expiry of patent term |
Granted publication date: 20071128 |
|
| EXPY | Termination of patent right or utility model |