CN221175307U - Microwave power control device - Google Patents
Microwave power control device Download PDFInfo
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- CN221175307U CN221175307U CN202323121072.5U CN202323121072U CN221175307U CN 221175307 U CN221175307 U CN 221175307U CN 202323121072 U CN202323121072 U CN 202323121072U CN 221175307 U CN221175307 U CN 221175307U
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Abstract
The utility model discloses a microwave power control device which comprises a main control board, a power driving module, a boosting rectifying module, a current transformer, a magnetron and an input voltage detection module, wherein the input voltage detection module is electrically connected with the main control board, the main control board is also electrically connected with the power driving module and the current transformer respectively, the boosting rectifying module is electrically connected between the power driving module and the current transformer, and the current transformer is electrically connected with the magnetron. In the utility model, as the input current of the magnetron is related to the output power of the magnetron, the main control board adjusts the voltage transmitted to the boosting rectification module in real time by jointly monitoring the current detection value input to the magnetron and the external input voltage input to the power driving module, thereby enabling the magnetron to output stable power, simplifying the control of microwave power and controlling the production cost.
Description
Technical Field
The utility model relates to the technical field of microwave devices, in particular to a microwave power control device.
Background
The microwave power control device can realize accurate control of microwave output power through advanced control technology and an accurate measurement system. Some advanced control systems adopt a technology combining DSP and thyristor control, and change the effective voltage value of the primary coil of the high-voltage transformer by accurately controlling the conduction angle of the thyristor, so as to realize the accurate control of the anode high voltage of the magnetron and further realize the accurate control of the output microwave power of the magnetron.
The output of the high-voltage current in the prior art influences the current output power, meanwhile, the fluctuation of the external input voltage can also cause unstable output power, the technical difficulty of directly detecting the microwave power to adjust the power is high, and the cost is high, so that the microwave power control device is provided.
Disclosure of utility model
The utility model aims to solve the problems of high technical difficulty and high cost in the prior art for directly detecting the output power of microwaves to control the power, thereby providing a microwave power control device.
In order to achieve the above purpose, the present utility model adopts the following technical scheme: the microwave power control device comprises a main control board, a power driving module, a boosting rectifying module, a current transformer, a magnetron and an input voltage detecting module, wherein the input voltage detecting module is electrically connected with the main control board, the main control board is also electrically connected with the power driving module and the current transformer respectively, the boosting rectifying module is electrically connected between the power driving module and the current transformer, and the current transformer is electrically connected with the magnetron; the input voltage detection module is used for detecting the power supply input voltage input to the power driving module; the current transformer is used for isolating the high-voltage part from the low-voltage part, detecting the input current of the magnetron and feeding the detected high-voltage current back to the main control board; the boost rectification is used for boosting low voltage and converting the low voltage into pulsating direct current; the power driving module is used for amplifying the control signal output by the control panel so as to drive the load equipment; the main control board monitors the detection value of the current transformer and the detection value of the input voltage detection module, and then controls the external input voltage through the power driving module X1.
Preferably, the boost rectifying module comprises a high-voltage transformer and a bridge rectifying module, wherein the high-voltage transformer boosts the input voltage to the voltage required by the operation of the magnetron; the bridge rectifier module is used for providing pulsating direct current for the magnetron; the output end of the power driving module is electrically connected with a high-voltage transformer, the output end of the high-voltage transformer is electrically connected with a bridge rectifier module, and the output end of the bridge rectifier module is electrically connected with a current transformer.
Preferably, a primary signal amplifier and a secondary signal amplifier are sequentially connected in series between the transformer and the main control board, wherein at least one first capacitor is arranged in parallel between the primary signal amplifier and the secondary signal amplifier, and the output end of the first capacitor is grounded; the second-stage signal amplifier is connected in series with the main control board, wherein at least one second capacitor is further connected in parallel between the first resistor and the main control board, and the output end of the second capacitor is grounded.
Preferably, when the number of the first capacitors is at least two, the at least two first capacitors perform multiple filtering processing on the transmission signals between the primary signal amplifier and the secondary signal amplifier; when the number of the second capacitors is at least two, the at least two second capacitors carry out multiple filtering processing on the transmission signals between the first resistor and the main control board.
Preferably, the magnetron is also electrically connected with a magnetron auxiliary power supply; the input voltage detection module comprises a second resistor, a third resistor and a fourth resistor, wherein the second resistor is used for sampling voltage, the third resistor is used for limiting current, the fourth resistor is used for amplifying signals, the AC input voltage is connected into the operational amplifier through the third resistor, the output end of the operational amplifier is electrically connected with the fourth resistor, and the output end of the third resistor is electrically connected with the main control board.
Preferably, a fifth resistor (R6) and a third capacitor are further arranged in parallel between the main control board and the fourth resistor.
Preferably, the AC input voltage is a power supply input voltage, and an output end of the AC input voltage is electrically connected with the power driving module.
Preferably, a fourth capacitor for removing alternating current, a piezoresistor for protecting the power driving module and an optocoupler are further arranged in parallel between the power driving module and the step-up transformer, wherein the input end of the optocoupler is electrically connected with a seventh resistor, and the input end of the seventh resistor is electrically connected with a main control board.
Preferably, the output end of the AC input voltage is further electrically connected to an input end of the step-up transformer and an input end of the eighth resistor, wherein the output end of the eighth resistor and the fourth capacitor are mutually connected in series.
Preferably, the power driving module is a silicon controlled rectifier.
The beneficial effects are that: the input current of the magnetron is related to the output power of the magnetron, the main control board adjusts the voltage transmitted to the boosting rectification module in real time by jointly monitoring the current input to the magnetron and the external voltage input to the power driving module, so that the magnetron outputs stable power, and under the condition of accurately controlling the microwave power, the control of the microwave power is optimized, and the production cost is reduced; the device adopts a two-stage amplifying circuit to ensure the signal amplitude of a high-voltage current detection part and simultaneously improves the anti-interference capability, and compared with the existing direct microwave power detection device, the device has the advantages of no need of special debugging, low cost and high consistency.
Drawings
Fig. 1 is a block diagram of a microwave power control device according to the present utility model;
Fig. 2 is a block diagram of a microwave power control device according to the present utility model;
Fig. 3 is a circuit diagram of a microwave power adjustment circuit of a microwave power control device according to the present utility model;
fig. 4 is a circuit for processing a microwave output power detection signal of a microwave power control device according to the present utility model;
Fig. 5 is a circuit diagram of an input voltage fluctuation detection circuit of a microwave power control device according to the present utility model.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is evident that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
In the description of the present utility model, it should be noted that, directions or positional relationships indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., are based on directions or positional relationships shown in the drawings, are merely for convenience of description and simplification of description, and do not indicate or imply that the apparatus or element to be referred to must have a specific direction, be constructed and operated in the specific direction, and thus should not be construed as limiting the present utility model; the terms "first," "second," "third," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance, and furthermore, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "coupled," and the like are to be construed broadly, and may be either fixedly coupled, detachably coupled, or integrally coupled, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.
Example 1
Referring to fig. 1-5, an embodiment of the present utility model provides a microwave power control device, including a main control board, a power driving module X1, a boost rectifying module, a current transformer, a magnetron, and an input voltage detecting module, where the input voltage detecting module is configured to detect a power supply input voltage input to the power driving module X1, where the power supply input voltage is easy to cause voltage input fluctuation due to various factors in a power supply system;
The magnetron is used for outputting microwave power;
The current transformer is used for isolating the high-voltage part from the low-voltage part, detecting the input current of the magnetron and feeding the detected high-voltage current back to the main control board;
the boost rectification is used for boosting low voltage and converting the low voltage into pulsating direct current;
the power driving module X1 is used for amplifying a control signal output by the control panel so as to drive load equipment;
The main control board monitors the detection value of the current transformer and the detection value of the input voltage detection module, and then controls the effective value of the external input voltage through the power driving module X1;
The input voltage detection module is electrically connected with the main control board, wherein the main control board is also electrically connected with the power driving module X1 and the current transformer respectively, the boosting rectification module is electrically connected between the power driving module X1 and the current transformer, and the current transformer is electrically connected with the magnetron.
In the embodiment, as the input current of the magnetron is related to the output power of the magnetron, the main control board adjusts the voltage transmitted to the boost rectifying module in real time by jointly monitoring the current input to the magnetron and the external voltage input to the power driving module X1, so that the magnetron outputs stable power; wherein the external voltage is a supply input voltage.
Example two
Referring to fig. 1 to 5, the first difference between the present embodiment and the embodiment is that the boost rectifying module includes a high voltage transformer and a bridge rectifying module, the high voltage transformer increases the input voltage to the voltage required by the operation of the magnetron;
the bridge rectifier module is used for providing pulsating direct current for the magnetron;
The output end of the power driving module X1 is electrically connected with a high-voltage transformer, wherein the output end of the high-voltage transformer is electrically connected with a bridge rectifier module, and the output end of the bridge rectifier module is electrically connected with a current transformer;
A primary signal amplifier YU8A and a secondary signal amplifier YU8B are sequentially connected in series between the transformer and the main control board, and the primary signal amplifier YU8A and the secondary signal amplifier YU8B are arranged to enable the signal output by the transformer to meet the processing range of the main control board;
At least one first capacitor is arranged in parallel between the first-stage signal amplifier YU8A and the second-stage signal amplifier YU8B, and the output end of the first capacitor is grounded; in this embodiment, when the number of the first capacitors is 1, the first capacitors perform a single filtering process on the transmission signal between the first-stage signal amplifier YU8A and the second-stage signal amplifier YU 8B; when the number of the first capacitors is at least two, the at least two first capacitors carry out multiple filtering processing on the transmission signals between the first-stage signal amplifier YU8A and the second-stage signal amplifier YU8B, so that signals to the main control board are stable and have no high-frequency clutter interference;
A first resistor R90 is connected in series between the second-stage signal amplifier YU8B and the main control board, at least one second capacitor is also connected in parallel between the first resistor R90 and the main control board, and the output end of the second capacitor is grounded; in this embodiment, when the number of the second capacitors is 1, the second capacitors perform single filtering processing on the transmission signal between the first resistor R90 and the main control board; when the number of the second capacitors is at least two, the at least two second capacitors carry out multiple filtering processing on the transmission signals between the first resistor R90 and the main control board, so that the main control board further processes stable signal fluctuation;
the magnetron is also electrically connected with a magnetron auxiliary power supply which supplies power for the magnetron;
The input voltage detection module comprises a second resistor R7, a third resistor R3 and a fourth resistor R4 which are the same as voltage sampling, and an operational amplifier U3 used for signal amplification processing, wherein the AC input voltage is connected into the operational amplifier U3 through the third resistor R3, the output end of the operational amplifier U3 is electrically connected with the fourth resistor R4, and the output end of the third resistor R4 is electrically connected with a main control board;
A fifth resistor R6 and a third capacitor C14 are also arranged in parallel between the main control board and the fourth resistor R4, and a stable signal which is output through the operational amplifier U3 and is convenient to process is enabled to be arranged through the third capacitor C14;
The AC input voltage is power supply input voltage, wherein the output end of the AC input voltage is electrically connected with a power driving module X1;
an optical coupler is electrically connected between the power driving module X1 and the main control board;
A fourth capacitor C1 for removing alternating current, a piezoresistor ZNR1 for protecting the power driving module X1 and an optical coupler U1 are also arranged in parallel between the power driving module X1 and the step-up transformer, wherein the input end of the optical coupler is electrically connected with a seventh resistor R11, and the input end of the seventh resistor R11 is electrically connected with a main control board;
The output end of the AC input voltage is also electrically connected with the input end of the step-up transformer and the input end of the eighth resistor R9, wherein the output end of the eighth resistor R9 and the fourth capacitor C1 are mutually connected in series;
The power driving module X1 is a silicon controlled rectifier.
In the embodiment, an optocoupler is arranged between the main control board and the power driving module to realize high-low voltage isolation, wherein the output voltage of the power driving module is controlled by the main control board, and the main control board controls the power driving module according to the signal acquisition condition of the current transformer and the input voltage detection module, so that the magnetron outputs stable microwave power.
Finally, it should be noted that: the foregoing description of the preferred embodiments of the present utility model is not intended to be limiting, but rather, although the present utility model has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described, or equivalents may be substituted for elements thereof, and any modifications, equivalents, improvements or changes may be made without departing from the spirit and principles of the present utility model.
Claims (10)
1. A microwave power control device, characterized by: the power control device comprises a main control board, a power driving module, a boosting rectifying module, a current transformer, a magnetron and an input voltage detecting module, wherein the input voltage detecting module is electrically connected with the main control board, the main control board is also electrically connected with the power driving module and the current transformer respectively, the boosting rectifying module is electrically connected between the power driving module and the current transformer, and the current transformer is electrically connected with the magnetron; the input voltage detection module is used for detecting the power supply input voltage input to the power driving module; the current transformer is used for isolating the high-voltage part from the low-voltage part, detecting the input current of the magnetron and feeding the detected high-voltage current back to the main control board; the boost rectification is used for boosting low voltage and converting the low voltage into pulsating direct current; the power driving module is used for amplifying the control signal output by the control panel so as to drive the load equipment; the main control board monitors the detection value of the current transformer and the detection value of the input voltage detection module, and then controls the effective value of the external input voltage through the power driving module.
2. The microwave power control device according to claim 1, wherein: the boost rectifying module comprises a high-voltage transformer and a bridge rectifying module, wherein the high-voltage transformer boosts the input voltage to the voltage required by the work of a magnetron; the bridge rectifier module is used for providing pulsating direct current for the magnetron; the output end of the power driving module is electrically connected with a high-voltage transformer, the output end of the high-voltage transformer is electrically connected with a bridge rectifier module, and the output end of the bridge rectifier module is electrically connected with a current transformer.
3. The microwave power control device according to claim 2, wherein: a primary signal amplifier (YU 8A) and a secondary signal amplifier (YU 8B) are sequentially and serially arranged between the transformer and the main control board, wherein at least one first capacitor is arranged in parallel between the primary signal amplifier (YU 8A) and the secondary signal amplifier (YU 8B), and the output end of the first capacitor is grounded; a first resistor (R90) is connected in series between the second-stage signal amplifier (YU 8B) and the main control board, wherein at least one second capacitor is also connected in parallel between the first resistor (R90) and the main control board, and the output end of the second capacitor is grounded.
4. A microwave power control device according to claim 3, wherein: when the number of the first capacitors is at least two, the at least two first capacitors carry out multiple filtering processing on the transmission signals between the first-stage signal amplifier (YU 8A) and the second-stage signal amplifier (YU 8B); when the number of the second capacitors is at least two, the at least two second capacitors carry out multiple filtering processing on the transmission signals between the first resistor (R90) and the main control board.
5. A microwave power control device according to any one of claims 1-4, wherein: the magnetron is also electrically connected with a magnetron auxiliary power supply; the input voltage detection module comprises a second resistor (R7) which is the same as voltage sampling, a third resistor (R3) and a fourth resistor (R4) which are used for limiting current, and an operational amplifier (U3) which is used for signal amplification processing, wherein AC input voltage is connected into the operational amplifier (U3) through the third resistor (R3), the output end of the operational amplifier (U3) is electrically connected with the fourth resistor (R4), and the output end of the third resistor (R4) is electrically connected with a main control board.
6. The microwave power control device according to claim 5, wherein: a fifth resistor (R6) and a third capacitor (C14) are also arranged in parallel between the main control board and the fourth resistor (R4).
7. The microwave power control device according to claim 5, wherein: the AC input voltage is power supply input voltage, wherein the output end of the AC input voltage is electrically connected with the power driving module.
8. The microwave power control device according to claim 5, wherein: the power driving device is characterized in that a fourth capacitor (C1) for removing alternating current, a piezoresistor (ZNR 1) for protecting the power driving module and an optical coupler (U1) are further arranged in parallel between the power driving module and the step-up transformer, wherein the input end of the optical coupler (U1) is electrically connected with a seventh resistor (R11), and the input end of the seventh resistor (R11) is electrically connected with a main control board.
9. The microwave power control device of claim 8, wherein: the output end of the AC input voltage is also electrically connected with the input end of the step-up transformer and the input end of the eighth resistor (R9), wherein the output end of the eighth resistor (R9) and the fourth capacitor (C1) are mutually connected in series.
10. The microwave power control device according to claim 1, wherein: the power driving module is a silicon controlled rectifier.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202323121072.5U CN221175307U (en) | 2023-11-20 | 2023-11-20 | Microwave power control device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202323121072.5U CN221175307U (en) | 2023-11-20 | 2023-11-20 | Microwave power control device |
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| Publication Number | Publication Date |
|---|---|
| CN221175307U true CN221175307U (en) | 2024-06-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202323121072.5U Active CN221175307U (en) | 2023-11-20 | 2023-11-20 | Microwave power control device |
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| CN (1) | CN221175307U (en) |
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2023
- 2023-11-20 CN CN202323121072.5U patent/CN221175307U/en active Active
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