CN113726160A - Output characteristic adjusting circuit and power supply system - Google Patents
Output characteristic adjusting circuit and power supply system Download PDFInfo
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- CN113726160A CN113726160A CN202111020031.XA CN202111020031A CN113726160A CN 113726160 A CN113726160 A CN 113726160A CN 202111020031 A CN202111020031 A CN 202111020031A CN 113726160 A CN113726160 A CN 113726160A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
- H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
- H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M3/145—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M3/155—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/156—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators
- H02M3/158—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load
- H02M3/1584—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load with a plurality of power processing stages connected in parallel
Abstract
The invention provides an output characteristic adjusting circuit and a power supply system, wherein the output characteristic adjusting circuit is provided with a first end and a second end, the first end is connected to a connecting path between a power supply and a load, the second end is connected to a reference node, and the load is a magnetron, a klystron or an electron tube; the output characteristic adjustment circuit includes: a reactive array having a plurality of reactive elements, wherein at least some of the plurality of reactive elements are connected between the first and second ends by conductive paths; a switching unit for selectively switching the conductive paths on or off so as to vary the overall reactance of the reactance array. The invention can make the power supply have wider output power interval by adjusting the output characteristic of the output pulse.
Description
The power supply system is a divisional application, the application number of the original application is 201810719338.0, the application date is 2018, 6 and 29, and the name of the power supply system is 'power supply system with an output characteristic regulating circuit'.
Technical Field
The present invention relates to power supply systems, and particularly to an output characteristic adjusting circuit and a power supply system.
Background
At present, a microwave system using a magnetron is widely used as a power source in systems such as a radiotherapy accelerator, an industrial irradiation accelerator, and a radar.
The existing magnetron microwave system changes the output microwave power within a relatively small range by changing the working voltage and current of a high-voltage power supply. For example, a magnetron with a peak power of 3MW generally has an adjustable output power range of about 1MW, i.e. a power range of 2MW to 3 MW. When it is desired to continuously adjust the voltage and the current to make the adjustable range of the output power wider, the output power of the magnetron is unstable due to the low or high rising rate of the output pulse of the high-voltage power supply.
Except for a magnetron microwave system, a klystron or an electron tube has certain requirements on the voltage rising rate of a high-voltage power supply, the conventional high-voltage power supply cannot meet the requirements, and the rising rate needs to be increased by changing the internal structure of the power supply at a higher cost. Meanwhile, the klystron and the electron tube often have different working points, and the high-voltage power supply cannot meet the requirement of the rising rate of the working points at the same time.
It is therefore desirable to provide an improved power supply system that provides controllable output characteristics.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a power supply with an output characteristic adjusting circuit, which can enable the power supply to have a wider output power range by adjusting the output characteristic of output pulses.
To solve the above technical problem, the present invention provides an output characteristic adjustment circuit having a first terminal for connecting to a connection path between a power supply and a load, and a second terminal for connecting to a reference node, the load being a magnetron, a klystron, or an electron tube; the output characteristic adjustment circuit includes: a reactive array having a plurality of reactive elements, wherein at least some of the plurality of reactive elements are connected between the first and second ends by conductive paths; a switching unit for selectively switching the conductive paths on or off so as to vary the overall reactance of the reactance array.
In an embodiment of the invention, the reactance array has a plurality of reactance branches connected in parallel, at least one of the plurality of reactance branches being connected between the first and second ends through the corresponding conductive path.
In an embodiment of the invention, at least one of the plurality of reactive branches comprises a plurality of reactive elements connected in series.
In an embodiment of the invention, the reactance element is a resistive element, a capacitive element or an inductive element.
In an embodiment of the invention, the switching unit comprises a switch arranged in the conductive path.
In an embodiment of the invention, the output characteristic adjustment circuit further includes a control unit providing the control signal, and the switching unit selectively turns on or off the conductive path according to the control signal.
In an embodiment of the present invention, the output characteristic adjustment circuit further includes a detection unit for detecting a connection state of the conductive path.
The present invention still further provides an output characteristic adjusting circuit having a first terminal for connecting to a connection path between a power supply and a load and a second terminal for connecting to a reference node, the load being a magnetron, a klystron, or a valve; the output characteristic adjustment circuit includes: an adjustable reactive component comprising one or more adjustable reactive elements.
The present invention also provides an output characteristic adjustment circuit having a first terminal for connection to a connection path between a power supply and a load, and a second terminal for connection to a reference node, the load being a magnetron, a klystron, or a valve; the output characteristic adjustment circuit includes: the plurality of reactance elements can adjust the output voltage and current of the power supply by changing the reactance of one or more reactance elements of the output characteristic adjusting circuit or changing the connection relation of the plurality of reactance elements, so that the load is in different working points and different powers are output.
The invention also provides a power supply system, which comprises a power supply and an output characteristic adjusting circuit, wherein the power supply is suitable for being connected with a load, and the load is a magnetron, a klystron or an electron tube; the output characteristic adjustment circuit has a first terminal for connection to a connection path between a power source and a load and a second terminal for connection to a reference node, the output characteristic adjustment circuit including: an adjustable reactive component; a reactance adjustment unit adapted to dynamically change a reactance value of the adjustable reactance component in accordance with a control signal.
The present invention also provides a power supply system including a power supply for connecting to a load to supply electric power and the output characteristic adjustment circuit according to any of the embodiments of the present invention.
The present invention also provides a power supply system including a power supply adapted to be connected to a load and an output characteristic adjustment circuit having a first terminal for connection to a connection path between the power supply and the load and a second terminal for connection to a reference node, the output characteristic adjustment circuit including: and a plurality of reactance elements, the overall reactance of which can be changed by changing the reactance of one or more reactance elements of the output characteristic adjusting circuit or by changing the connection relationship of the plurality of reactance elements. In an embodiment of the present invention, the power supply system further includes: a control unit providing the control signal; a detection unit connected to the conductive path and detecting a connection state of the conductive path, the control unit receiving a detection signal of the detection unit.
In an embodiment of the invention, the adjustable reactive component comprises one or more adjustable reactive elements; the reactance adjustment unit varies the reactance of the one or more adjustable reactance elements in response to a control signal, thereby varying the overall reactance of the adjustable reactance component.
In an embodiment of the invention, the control unit is configured to generate the control signal in dependence on an input signal, the input signal comprising a voltage and/or a current of the power supply.
In an embodiment of the invention, the control unit determines the reactance of the adjustable reactance component based on the voltage and/or current of the power supply, thereby generating the control signal.
In an embodiment of the present invention, a correspondence table of voltage and/or current of a power supply and reactance of an adjustable reactance component is preset in the control unit, and the correspondence table includes a plurality of sets of correspondences.
In an embodiment of the invention, the load is a magnetron, a klystron or an electron tube.
Compared with the prior art, the invention can selectively turn on or off the conductive paths by changing the switching unit of the output characteristic adjusting circuit, and correspondingly, the reactance elements connected between the first end and the second end in the reactance array can be changed, so that the overall reactance value of the reactance array is changed, and the power supply and the load are in different matching states. In this way, the output power of the power supply can cover a wider interval.
Drawings
Fig. 1 is an electrical schematic diagram of a magnetron microwave system according to a first embodiment of the present invention.
Fig. 2 is an electrical schematic diagram of a magnetron microwave system of a second embodiment of the present invention.
Fig. 3 is an electrical schematic diagram of a magnetron microwave system of a third embodiment of the present invention.
Fig. 4 is a circuit diagram of an output characteristic adjustment circuit of the first embodiment of the present invention.
Fig. 5 is a circuit diagram of an output characteristic adjustment circuit of a second embodiment of the present invention.
Fig. 6 is a circuit diagram of an output characteristic adjustment circuit of a third embodiment of the present invention.
Fig. 7 is a circuit diagram of an output characteristic adjustment circuit of a fourth embodiment of the present invention.
Fig. 8 is an example of adjusting the capacitance value of the capacitive element by the number of turns in the present invention.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, but the present invention may be practiced in other ways than those specifically described herein, and thus the present invention is not limited to the specific embodiments disclosed below.
As used in this application and the appended claims, the terms "a," "an," "the," and/or "the" are not intended to be inclusive in the singular, but rather are intended to be inclusive in the plural unless the context clearly dictates otherwise. In general, the terms "comprises" and "comprising" merely indicate that steps and elements are included which are explicitly identified, that the steps and elements do not form an exclusive list, and that a method or apparatus may include other steps or elements.
It will be understood that when an element or module is referred to as being "connected," "coupled" to another element, module or block, it can be directly connected or coupled or in communication with the other element, module or block or intervening elements, modules or blocks may be present, unless the context clearly dictates otherwise. As used herein, the term "and/or" can include any and all combinations of one or more of the associated listed items.
Embodiments of the present application describe a power supply system and an output characteristic adjustment circuit thereof. Power supply systems typically have a power supply connected to a load to provide power and an output characteristic adjustment circuit. The output characteristic adjustment circuit according to the embodiment of the present invention has a first terminal connected to a connection path between a power source and a load and a second terminal connected to a reference node (e.g., a ground potential). The output characteristic adjusting circuit may include a plurality of reactance elements such as a resistance element, a capacitance element, and an inductance element, and the output voltage and the output current of the power supply may be adjusted by changing the reactance of one or more reactance elements in the output characteristic adjusting circuit or by changing the connection relationship of the plurality of reactance elements, so that the load may be set to different operating points to output different powers.
In the embodiments of the present application, the load may be a magnetron, a klystron, an electron tube, or the like, and the following embodiments will be described by taking the magnetron as an example.
First embodiment
Fig. 1 is an electrical schematic diagram of a magnetron microwave system according to a first embodiment of the present invention. Referring to fig. 1, the magnetron microwave system of the present embodiment may include a power supply 10, a magnetron 20, and an output characteristic adjusting circuit 30. The power supply 10 and the output characteristic adjustment circuit 30 constitute a power supply system. The power supply 10 is connected to the magnetron 20. The power supply 10 is a high voltage power supply required for a magnetron and is capable of supplying a voltage of the order of kV and a current of several tens to several hundreds of a. The output characteristic adjustment circuit 30 may have a first terminal N1 and a second terminal N2. The first terminal N1 is connected to a connection path between the power supply 10 and the magnetron 20, and the second terminal N2 may be connected to a reference node, such as ground.
The output characteristic adjusting circuit 30 may include a switching unit 31 and a reactance array 32. The reactive array 32 may have a plurality of reactive elements. Here, the reactance elements may be resistive elements, capacitive elements, or inductive elements. At least some of these reactive elements are connected between the first terminal N1 and the second terminal N2 by controlled conductive paths. The switching unit 31 can selectively turn on or off the conductive paths according to a control signal, thereby changing the overall reactance of the reactance array. Here, the reactive elements in the reactive array 32 may be connected in various ways, such as in series, in parallel, or in a combination of series and parallel. The plurality of reactance elements connected in parallel or in series may be the same kind of reactance elements (e.g., resistance elements) or different kinds of reactance elements (e.g., resistance elements and capacitance elements). The conductive path controlled in the reactive array 32 may be one or more. One reactive element may correspond to one conductive path, or a plurality of reactive elements may correspond to one conductive path.
Fig. 4 is a circuit diagram of an output characteristic adjustment circuit of the first embodiment of the present invention. In the example of fig. 4, the reactance array 32 has a plurality of reactance branches 321-32n in parallel. These reactive branches 321-32n include a plurality of reactive elements in series, such as capacitive elements C1-Cn and resistive elements R1-Rn. Although each of the reactive legs 321-32n is shown here as having a similar construction, it will be appreciated that the type and number of reactive elements in each reactive leg may vary. In addition, the reactance values of the reactive elements in the respective reactive branches 321-32n may be the same or different. These reactive branches 321-32N are each between a first end N1 and a second end N2 through a corresponding conductive path. It is however understood that only some of the reactive branches may be provided with corresponding conductive paths so as to be selectively connected between the first terminal N1 and the second terminal N2, while the other reactive branches are constantly connected between the first terminal N1 and the second terminal N2.
As mentioned above, each conductive path is composed of nodes Y1-Yn and corresponding nodes D1-Dn. The switching unit 31 comprises a switch S1-Sn provided in the conductive path. Typically, a switch is provided on each conductive path, for example, switch S1 on the conductive path of Y1 and D1, although this is not a limitation. The switch herein may be selected to be a high voltage switch capable of withstanding high voltages, depending on the voltage requirements. Each of the switches S1-Sn may be controlled by a set of control signals to turn on or off, thereby turning on or off the corresponding conductive path. Accordingly, the reactive element in the reactive array connected between the first terminal N1 and the second terminal N2 may vary, thereby changing the overall reactance of the reactive array. For example, when switch S1 is on and switches S2-Sn are off, the overall reactance of the reactance array is the reactance embodied by the reactance branch 321; when switches S1 and S2 are on and switches S3-Sn are off, the overall reactance of the reactance array is the reactance embodied by the reactance legs 321 and 322.
The setting of the overall reactance of the reactance array may be determined based on the value of the voltage and/or current desired to be output by the power supply 10. Table 1 below shows 5 typical sets of operating parameters of a magnetron microwave system of a set of output characteristic adjusting circuits, where each set of operating parameters includes power supply voltage, power supply current, output characteristic adjusting circuit capacitance, output characteristic adjusting circuit resistance, and magnetron output power.
TABLE 1
In one example, the control signal provided to the switching unit 31 may be generated according to the power output voltage and current, and the capacitance and resistance of the output characteristic adjusting circuit 30 may be determined, so that the power supply 10 and the magnetron 20 are in a desired matching state. When the combination of the capacitance and the resistance of the output characteristic adjusting circuit 30 is selected, the power supply 10 and the magnetron 20 can be in different matching states, and the output power covers the range from 0.6MW to 3.1 MW. In addition, the magnetron 20 can be stabilized at a desired output power in different matching states. For example, in one state, the magnetron 20 may be stabilized at an output power of 3.1MW, and in another state, the magnetron 20 may be stabilized at an output power of 1.60 MW.
The microwave system of the magnetron described in the embodiment can be widely used in systems such as radiotherapy accelerators, industrial irradiation accelerators and radars.
Second embodiment
Fig. 2 is an electrical schematic diagram of a magnetron microwave system of a second embodiment of the present invention. Referring to fig. 2, the magnetron microwave system of the present embodiment may include a power supply 10, a magnetron 20, and an output characteristic adjusting circuit 30 a. The power supply 10 and the output characteristic adjustment circuit 30a constitute a power supply system. The power supply 10 is connected to the magnetron 20. The power supply 10 is a high voltage power supply required for a magnetron and is capable of supplying a voltage of the order of kV and a current of several tens to several hundreds of a. The output characteristic adjustment circuit 30a may have a first terminal N1 and a second terminal N2. The first terminal N1 is connected to a connection path between the power supply 10 and the magnetron 20, and the second terminal N2 may be connected to a reference node, such as ground.
The output characteristic adjusting circuit 30a may include a switching unit 31, a reactance array 32, and a control unit 33. The reactive array 32 may have a plurality of reactive elements. Here, the reactance elements may be resistive elements, capacitive elements, or inductive elements. At least some of these reactive elements are connected between the first terminal N1 and the second terminal N2 by controlled conductive paths. The control unit 33 may generate a control signal according to the input signal. The switching unit 31 may selectively turn on or off the conductive paths in accordance with a control signal, thereby changing the overall reactance of the reactance array. Here, the reactive elements in the reactive array 32 may be connected in various ways, such as in series, in parallel, or in a combination of series and parallel. The plurality of reactance elements connected in parallel or in series may be the same kind of reactance element (e.g., resistive element) or different kinds of reactance elements (e.g., resistive element and capacitive element). The conductive path controlled in the reactive array 32 may be one or more. One reactive element may correspond to one conductive path, or a plurality of reactive elements may correspond to one conductive path.
Fig. 5 is a circuit diagram of an output characteristic adjustment circuit of a second embodiment of the present invention. In the example of fig. 5, the reactance array 32 has a plurality of reactance branches 321-32n in parallel. These details can be referred to the description of the first embodiment and will not be expanded upon here.
As mentioned above, each conductive path is composed of nodes Y1-Yn and corresponding nodes D1-Dn. The switching unit 31 comprises a switch S1-Sn provided in the conductive path. The details of the switching unit 31 can refer to the description of the first embodiment and will not be expanded here.
The setting of the overall reactance of the reactance array may be determined based on the value of the voltage and/or current desired to be output by the power supply 10. Specific settings can be found in table 1 above.
In one example, the control unit 33 may determine the reactance of the output characteristic adjustment circuit 30 according to input signals including the power supply output voltage and current. Accordingly, the control unit 33 generates a control signal to be supplied to the switching unit 31, and the switching unit 31 determines the capacitance and resistance of the output characteristic adjustment circuit 30 by controlling the conductive path, so that the power supply 10 and the magnetron 20 are in a desired matching state. When the combination of the capacitance and the resistance of the output characteristic adjusting circuit 30 is selected, the power supply 10 and the magnetron 20 can be in different matching states, and the output power covers the range from 0.6MW to 3.1 MW. In addition, the magnetron 20 can be stabilized at a desired output power in different matching states. For example, in one state, the magnetron 20 may be stabilized at an output power of 3.1MW, and in another state, the magnetron 20 may be stabilized at an output power of 1.6 MW.
Third embodiment
Fig. 3 is an electrical schematic diagram of a magnetron microwave system of a third embodiment of the present invention. Referring to fig. 3, the magnetron microwave system of the present embodiment may include a power supply 10, a magnetron 20, and an output characteristic adjusting circuit 30 b. The power supply 10 and the output characteristic adjustment circuit 30b constitute a power supply system. The power supply 10 is connected to the magnetron 20. The power supply 10 is a high voltage power supply required for a magnetron and is capable of supplying a voltage of the order of kV and a current of several tens to several hundreds of a. The output characteristic adjustment circuit 30b may have a first terminal N1 and a second terminal N2. The first terminal N1 is connected to a connection path between the power supply 10 and the magnetron 20, and the second terminal N2 may be connected to a reference node, such as ground.
The output characteristic adjustment circuit 30a may include a switching unit 31, a reactance array 32, a control unit 33, and a detection unit 34. The reactive array 32 may have a plurality of reactive elements. Here, the reactance elements may be resistive elements, capacitive elements, or inductive elements. At least some of these reactive elements are connected between the first terminal N1 and the second terminal N2 by controlled conductive paths. The control unit 33 may generate a control signal according to the input signal. The switching unit 31 may selectively turn on or off the conductive paths in accordance with a control signal, thereby changing the overall reactance of the reactance array. Here, the reactive elements in the reactive array 32 may be connected in various ways, such as in series, in parallel, or in a combination of series and parallel. The plurality of reactance elements connected in parallel or in series may be the same kind of reactance element (e.g., resistive element) or different kinds of reactance elements (e.g., resistive element and capacitive element). The conductive path controlled in the reactive array 32 may be one or more. One reactive element may correspond to one conductive path, or a plurality of reactive elements may correspond to one conductive path. The detection unit 34 may be connected to the controlled conductive path, and detect the connection state of the conductive path. The detection unit 34 may transmit the detection signal to the control signal 33. The manner of detection by the detection unit 34 may be a current value on the conductive path. For example, when the conductive path is conductive, the current is of a large value and thus exceeds the set threshold, and when the conductive path is broken, the current is of a very small value and thus is less than the set threshold.
Fig. 6 is a circuit diagram of an output characteristic adjustment circuit of a third embodiment of the present invention. In the example of fig. 6, the reactance array 32 has a plurality of reactance branches 321-32n in parallel. These details can be referred to the description of the first embodiment and will not be expanded upon here.
As mentioned above, each conductive path is composed of nodes Y1-Yn and corresponding nodes D1-Dn. The switching unit 31 comprises a switch S1-Sn provided in the conductive path. The details of the switching unit 31 can refer to the description of the first embodiment and will not be expanded here.
The setting of the overall reactance of the reactance array may be determined based on the value of the voltage and/or current desired to be output by the power supply 10. Specific settings can be found in table 1 above.
In one example, the control unit 32 may determine the reactance of the output characteristic adjustment circuit 30 according to input signals including the power supply output voltage and current. Accordingly, the control unit 32 generates a control signal to be supplied to the switching unit 31, and the switching unit 31 determines the capacitance and resistance of the output characteristic adjustment circuit 30 by controlling the conductive path, so that the power supply 10 and the magnetron 20 are in a desired matching state. In addition, the detecting unit 34 may include detecting elements 341 to 34n distributed on each of the conductive paths for detecting whether each of the conductive paths is conducted. When the switch (e.g., S1) is closed, the current exceeds the threshold; when the switches (e.g., S1) are turned off, the current is lower than the threshold, and it can be determined whether each of the switches S1-Sn is in the required operating state. The control unit 32 may also report the connection status of each path upwards after receiving the detection signal.
In this embodiment, when different combinations of the capacitance and the resistance of the output characteristic adjusting circuit 30 are selected, the power supply 10 and the magnetron 20 can be in different matching states, and the output power covers the range of 0.6MW to 3.1 MW. In addition, the magnetron 20 can be stabilized at a desired output power in different matching states. For example, in one state, the magnetron 20 may be stabilized at an output power of 3.1MW, and in another state, the magnetron 20 may be stabilized at an output power of 1.6 MW.
Fourth embodiment
The power supply system of the present embodiment is different from the other embodiments in the output characteristic adjusting circuit. Fig. 7 is a circuit diagram of an output characteristic adjustment circuit of a fourth embodiment of the present invention. Referring to fig. 7, the output characteristic adjustment circuit 40 of the present embodiment includes an adjustable reactance component 41 and a reactance adjustment unit 42. The adjustable reactive component 41 may comprise one or more adjustable reactive elements. The adjustable reactive element may be a capacitive element, such as C11-C1n, C21-C2 n. The adjustable reactive element may also be a resistive element, such as R1-Rn. The reactive elements in the tunable reactive component 41 may be connected in a variety of ways, such as in series, in parallel, or in a combination of series and parallel. The plurality of reactance elements connected in parallel or in series may be the same kind of reactance element (e.g., resistive element) or different kinds of reactance elements (e.g., resistive element and capacitive element). The adjustable reactance component 41 may have some reactance elements adjustable in reactance, or may have all reactance elements adjustable in reactance.
The tunable capacitive element may be a more common trim capacitor. The trimming capacitor can use ceramic as medium, and has semi-circular silver layers plated on both the moving plate and the fixed plate, and the distance between the moving plate and the fixed plate is changed by rotating the moving plate, so that the capacitance can be changed. Because the adjustable range of the trimming capacitor is small, the required capacitor requirement can be realized through a plurality of series-parallel connections. Fig. 8 is an example of adjusting the capacitance value of the capacitive element by turns in the present invention, and the reactance adjustment unit 42 may change the capacitance value by driving the moving plate to rotate by a corresponding number of turns by the adjustment signal as shown in fig. 8.
Although the present invention has been described with reference to the present specific embodiments, it will be appreciated by those skilled in the art that the above embodiments are merely illustrative of the present invention, and various equivalent changes and substitutions may be made without departing from the spirit of the invention, and therefore, it is intended that all changes and modifications to the above embodiments within the spirit and scope of the present invention be covered by the appended claims.
Claims (12)
1. An output characteristic adjustment circuit, characterized in that the output characteristic adjustment circuit has a first terminal for connection to a connection path between a power supply and a load, and a second terminal for connection to a reference node, the load being a magnetron, a klystron or a valve; the output characteristic adjustment circuit includes:
a reactive array having a plurality of reactive elements, wherein at least some of the plurality of reactive elements are connected between the first and second ends by conductive paths;
a switching unit for selectively switching the conductive paths on or off so as to vary the overall reactance of the reactance array.
2. An output characteristic adjustment circuit according to claim 1, wherein the reactance array has a plurality of reactance branches connected in parallel, at least one of the plurality of reactance branches being connected between the first and second ends by a corresponding said conductive path.
3. The output characteristic adjustment circuit of claim 2, wherein at least one of the plurality of reactive legs comprises a plurality of reactive elements in series.
4. An output characteristic adjusting circuit according to claim 2 or 3, wherein the reactance element is a resistive element, a capacitive element or an inductive element.
5. An output characteristic adjusting circuit according to claim 2 or 3, wherein the switching unit includes a switch provided in the conductive path.
6. The output characteristic adjustment circuit according to claim 1, further comprising a control unit for providing a control signal, the switching unit selectively turning on or off the conductive path according to the control signal.
7. The output characteristic adjustment circuit according to claim 1, further comprising a detection unit for detecting a connection state of the conductive path.
8. An output characteristic adjustment circuit, characterized in that the output characteristic adjustment circuit has a first terminal for connection to a connection path between a power supply and a load, and a second terminal for connection to a reference node, the load being a magnetron, a klystron or a valve; the output characteristic adjustment circuit includes:
an adjustable reactive component comprising one or more adjustable reactive elements.
9. An output characteristic adjustment circuit, characterized in that the output characteristic adjustment circuit has a first terminal for connection to a connection path between a power supply and a load, and a second terminal for connection to a reference node, the load being a magnetron, a klystron or a valve; the output characteristic adjustment circuit includes:
the plurality of reactance elements can adjust the output voltage and current of the power supply by changing the reactance of one or more reactance elements of the output characteristic adjusting circuit or changing the connection relation of the plurality of reactance elements, so that the load is in different working points and different powers are output.
10. A power supply system comprising a power supply and an output characteristic adjustment circuit, the power supply being adapted to be connected to a load, the load being a magnetron, klystron or electron tube; the output characteristic adjustment circuit has a first terminal for connection to a connection path between a power source and a load and a second terminal for connection to a reference node, the output characteristic adjustment circuit including:
an adjustable reactive component;
a reactance adjustment unit adapted to dynamically change a reactance value of the adjustable reactance component in accordance with a control signal.
11. A power supply system comprising a power supply for connecting to a load to supply electric power, and the output characteristic adjustment circuit according to any one of claims 1 to 9.
12. A power supply system comprising a power supply adapted to be connected to a load and an output characteristic adjustment circuit having a first terminal for connection to a connection path between the power supply and the load and a second terminal for connection to a reference node, the output characteristic adjustment circuit comprising:
and a plurality of reactance elements, the overall reactance of which can be changed by changing the reactance of one or more reactance elements of the output characteristic adjusting circuit or by changing the connection relationship of the plurality of reactance elements.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111020031.XA CN113726160A (en) | 2018-06-29 | 2018-06-29 | Output characteristic adjusting circuit and power supply system |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111020031.XA CN113726160A (en) | 2018-06-29 | 2018-06-29 | Output characteristic adjusting circuit and power supply system |
| CN201810719338.0A CN108880251B (en) | 2018-06-29 | 2018-06-29 | Power supply system with output characteristic adjusting circuit |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810719338.0A Division CN108880251B (en) | 2018-06-29 | 2018-06-29 | Power supply system with output characteristic adjusting circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113726160A true CN113726160A (en) | 2021-11-30 |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1227678A (en) * | 1996-06-13 | 1999-09-01 | 射频功率产品公司 | Method and apparatus for matching a variable load impedence with an RF power generator impedance |
| US20120112815A1 (en) * | 2010-11-04 | 2012-05-10 | Advanced Energy Industries, Inc. | High frequency solid state switching for impedance matching |
| CN103444078A (en) * | 2011-01-20 | 2013-12-11 | 先进能源工业公司 | Impedance-matching network using BJT switches in variable-reactance circuits |
| CN107112972A (en) * | 2014-12-19 | 2017-08-29 | 麻省理工学院 | Tunable match network with phase switching elements |
| US20170301516A1 (en) * | 2014-01-10 | 2017-10-19 | Reno Technologies, Inc. | System for providing variable capacitance |
| US20170359034A1 (en) * | 2016-06-14 | 2017-12-14 | Analogic Corporation | RF Power Amplifier with Dynamic Impedance Matching through Discrete Presets and/or a Variable Power Supply |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100440679C (en) * | 2002-11-20 | 2008-12-03 | 盈正豫顺电子股份有限公司 | Mixing type virtual work compensator |
-
2018
- 2018-06-29 CN CN201810719338.0A patent/CN108880251B/en active Active
- 2018-06-29 CN CN202111020031.XA patent/CN113726160A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1227678A (en) * | 1996-06-13 | 1999-09-01 | 射频功率产品公司 | Method and apparatus for matching a variable load impedence with an RF power generator impedance |
| US20120112815A1 (en) * | 2010-11-04 | 2012-05-10 | Advanced Energy Industries, Inc. | High frequency solid state switching for impedance matching |
| CN103444078A (en) * | 2011-01-20 | 2013-12-11 | 先进能源工业公司 | Impedance-matching network using BJT switches in variable-reactance circuits |
| US20170301516A1 (en) * | 2014-01-10 | 2017-10-19 | Reno Technologies, Inc. | System for providing variable capacitance |
| CN107112972A (en) * | 2014-12-19 | 2017-08-29 | 麻省理工学院 | Tunable match network with phase switching elements |
| US20170359034A1 (en) * | 2016-06-14 | 2017-12-14 | Analogic Corporation | RF Power Amplifier with Dynamic Impedance Matching through Discrete Presets and/or a Variable Power Supply |
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| CN108880251A (en) | 2018-11-23 |
| CN108880251B (en) | 2021-07-13 |
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