Digital integrated control microwave power module

Abstract

The invention discloses a digital integrated control microwave power module, which replaces a plurality of previous analog controllers with a digital integrated controller, simplifies a control circuit of the microwave power module, and reduces the size of the control circuit. Preheating, high voltage and emission instructions and spiral voltage and spiral current sampling of the microwave power module are integrated through a digital integrated communication bus, and original complex level interfaces and analog interfaces are simplified and unified into the communication bus. Through processing of the digital control chip, a control circuit and an external interface of the microwave power module are simplified, the size of the control circuit of the microwave power module is reduced, electrical isolation of the digital integrated controller and the power circuit is completed through the optocoupler, the isolation driver, the transformer and the like, and reliability is improved.

Description

Technical Field

[0001] This invention belongs to the field of microwave transmission, and specifically relates to a digitally integrated control microwave power module. Background Technology

[0002] The microwave power module integrates a preamplifier, a miniaturized high-voltage power supply, and a mini traveling wave tube (TWT). It combines the advantages of high small-signal gain of the solid-state amplifier with the high-power final-stage amplification efficiency of the TWT. By reducing the gain of the TWT, the size of the TWT and the cathode voltage are greatly reduced, achieving miniaturization of the TWT and the high-voltage power supply. The gain deficiency is compensated by cascading a preamplifier with high small-signal gain. It features high RF amplification efficiency, light weight, small size, and high power density, and has significant advantages in application platforms with limited power supply or size and weight constraints.

[0003] The microwave power module currently designed internally uses a dedicated analog PWM controller to perform PWM control on the filament modulator power supply and a dedicated analog PWM controller to perform PWM control on the high-voltage power supply. It uses a cascaded trigger oscillation gate circuit to perform carrier modulation on the transmit pulse. The preheating, high voltage, and transmit control of the miniaturized high-voltage power supply are completed through external level commands.

[0004] The microwave power modules currently designed have problems such as complex control circuits and numerous external interfaces. Summary of the Invention

[0005] To address the aforementioned problems, the present invention aims to provide a digitally integrated control microwave power module. This module integrates the filament power conversion circuit, the PWM signal of the high-voltage power conversion circuit, the carrier modulation and attenuation control of the transmitted pulse signal, commands, and status reports of the microwave power module into a single digital control chip. This simplifies the control circuit and external interface of the microwave power module, reduces the size of the control circuit, and achieves electrical isolation between the digital integrated controller and the power circuit through optocouplers, isolation drivers, transformers, etc., thereby improving reliability.

[0006] The specific technical solution for achieving the objective of this invention is as follows:

[0007] A digitally integrated microwave power module includes a digitally integrated controller, a filament power conversion circuit, a pulse isolation transformer, a high-voltage power conversion circuit, a preamplifier solid-state amplifier, a filament transformer, a high-voltage power transformer, a filament power supply and modulator, a high-voltage rectifier and filter circuit, and a miniaturized traveling wave tube.

[0008] The digital integrated controller receives external signals and sends them to the filament power conversion circuit, the pulse isolation transformer, and the high-voltage power conversion circuit, respectively.

[0009] The digital integrated controller receives external communication bus messages to complete the attenuation control of the preamplifier solid-state amplifier;

[0010] The pre-amplifier provides amplified radio frequency signals to the miniaturized traveling wave tube; the high-voltage power conversion circuit sends the high-voltage conversion switch voltage to the high-voltage power transformer, the high-voltage power transformer sends the converted voltage to the high-voltage rectifier and filter circuit, and the high-voltage rectifier and filter circuit provides rectified and filtered voltage to the miniaturized traveling wave tube;

[0011] The filament power conversion circuit sends the filament switching voltage to the filament transformer, which in turn sends the high-frequency filament switching voltage and the high-frequency focusing electrode switching voltage to the filament power supply and modulator. The filament power supply and modulator provide filament power to the miniaturized traveling wave tube and provide the focusing electrode of the miniaturized traveling wave tube with the high-voltage floating carrier modulated pulse signal sent from the pulse isolation transformer.

[0012] Furthermore, the digital integrated controller acquires the spiral voltage and spiral current of the high-voltage power conversion circuit and sends them to the external host computer via a message bus.

[0013] Furthermore, when the digital integrated controller acquires the spiral voltage and spiral current of the high-voltage power conversion circuit:

[0014] The spiral voltage and spiral current are collected by the resistor sampling network of the high-voltage power supply section in the high-voltage power conversion circuit, amplified by the first operational amplifier, and then sent to the second operational amplifier for proportional adjustment.

[0015] The conditioned voltage or current signal is sent to the analog voltage isolator for signal isolation via magnetic isolation. After that, it is proportionally adjusted by the third operational amplifier and then sent to the fourth operational amplifier for emitter follower amplification. Finally, the sampling circuit in the digital integrated controller samples the solenoid voltage and solenoid current.

[0016] Furthermore, the digital integrated controller provides filament conversion PWM signals to the filament power conversion circuit;

[0017] The digital integrated controller receives external communication bus messages and completes the preheating and transmission command control of the filament power conversion circuit.

[0018] Furthermore, the digital integrated controller provides a high-voltage conversion PWM signal for the high-voltage power conversion circuit;

[0019] The digital integrated controller receives external communication bus messages and completes high-voltage command control of the high-voltage power conversion circuit.

[0020] Furthermore, when the digital integrated controller completes the preheating, transmission command control and high voltage command control, the digital integrated controller GPIO in the digital integrated controller sends the command to the light-emitting diode side of the optocoupler after passing through the buffer driver, and then outputs it to the filament power conversion circuit or the high voltage power conversion circuit respectively.

[0021] The command from the high-voltage power supply side is provided by the pull-up of the phototransistor, which completes the electrical isolation.

[0022] Furthermore, the digital integrated controller achieves electrical isolation between the filament power conversion circuit and the high voltage power conversion circuit's filament conversion PWM signal and the high voltage conversion PWM signal through an isolation driver;

[0023] The digital integrated controller is equipped with a digital integrated controller DPWM. After the PWM signal is sent out, it is sent to the isolation driver after level conversion and decoupling. The isolation driver achieves electrical isolation between the two circuits through capacitor isolation.

[0024] Furthermore, the digital integrated controller receives the transmitted pulse from the outside, processes it into a carrier-modulated pulse signal, and then sends it to the pulse isolation transformer.

[0025] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0026] The present invention integrates the filament power conversion circuit, the PWM signal of the high-voltage power conversion circuit, the carrier modulation of the transmitted pulse signal, attenuation control, command and status reporting into a digital integrated controller, thereby reducing the size of the microwave power module control circuit, simplifying and unifying the external interface of the microwave power module, and achieving electrical isolation between the digital integrated controller and the power circuit through optocouplers, isolation drivers, transformers, etc., thus improving reliability.

[0027] (1) Small control circuit size: The digital integrated control microwave power module of the present invention replaces multiple analog controllers with a digital integrated controller, which simplifies the control circuit of the microwave power module and reduces the size of the control circuit.

[0028] (2) Simple and unified external interface: The digital integrated control microwave power module of the present invention integrates the preheating, high voltage, transmission command and solenoid voltage and solenoid current sampling of the microwave power module through the digital integrated communication bus, simplifying and unifying the original complex level interface and analog interface into a communication bus.

[0029] (3) High reliability: The digital integrated control microwave power module of the present invention completes the electrical isolation between the digital integrated controller and the power circuit through optocouplers, isolation drivers, transformers, etc., ensuring that abnormal electrical stress will not be applied to the digital integrated controller through the common ground loop when the high voltage power supply or traveling wave tube arcs, thus improving reliability.

[0030] As can be seen, the digitally integrated control microwave power module of this invention replaces multiple analog controllers with a digitally integrated controller, simplifying the control circuit of the microwave power module and reducing its size. The preheating, high-voltage, and transmission commands, as well as the sampling of solenoid voltage and current, of the microwave power module are integrated through a digitally integrated communication bus, simplifying and unifying the previously complex level interfaces and analog interfaces into a single communication bus. Electrical isolation between the digitally integrated controller and the power circuit is achieved through optocouplers, isolation drivers, transformers, etc., ensuring that abnormal electrical stress will not be applied to the digitally integrated controller through a common ground loop and cause failure in cases such as arcing of the high-voltage power supply or traveling wave tube, thus improving reliability.

[0031] The present invention will be further described below with reference to specific embodiments. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of the microwave power module architecture for digital integrated control according to the present invention.

[0033] Figure 2 This is a schematic diagram of the isolation circuit for sampling helical voltage and current in the digital integrated controller of the present invention.

[0034] Figure 3 This is a schematic diagram of the preheating, high voltage, and transmission command output isolation circuit in the digital integrated controller of the present invention.

[0035] Figure 4 This is a schematic diagram of the PWM isolation drive circuit in the digital integrated controller of the present invention.

[0036] Figure 5 This is a three-dimensional structural diagram of the microwave power module with digital integrated control according to the present invention. Detailed Implementation

[0037] Example

[0038] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. The described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0039] As indicated in this application and claims, unless the context clearly indicates otherwise, the words "a," "an," "an," and / or "the" do not specifically refer to the singular and may also include the plural. Generally speaking, the terms "comprising" and "including" only indicate the inclusion of explicitly identified steps and elements, which do not constitute an exclusive list, and the method or apparatus may also include other steps or elements.

[0040] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of this application. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0041] Combination Figure 1 A microwave power module with digital integrated control includes a digital integrated controller 1, a filament power conversion circuit 2, a pulse isolation transformer 3, a high-voltage power conversion circuit 4, a pre-amplifier 5, a filament transformer 6, a high-voltage power transformer 7, a filament power supply and modulator 8, a high-voltage rectifier and filter circuit 9, and a miniaturized traveling wave tube 10.

[0042] The digital integrated controller 1 receives external signals and sends them to the filament power conversion circuit 2, the pulse isolation transformer 3, and the high-voltage power conversion circuit 4, respectively.

[0043] The digital integrated controller 1 receives external communication bus messages and completes attenuation control of the pre-solid-state amplifier 5;

[0044] Specifically, the pre-amplifier 5 provides amplified radio frequency signals to the miniaturized traveling wave tube 10; the high-voltage power conversion circuit 4 sends high-voltage conversion switch voltage to the high-voltage power transformer 7, and the high-voltage power transformer 7 sends the converted voltage, including the three-conversion switch voltage, the second-receiver conversion switch voltage, the first-receiver conversion switch voltage, and the high-voltage conversion switch voltage, to the high-voltage rectifier and filter circuit 9, which provides rectified and filtered voltage to the miniaturized traveling wave tube 10, including power supply to the cathode, the third-receiver, the second-receiver, and the first-receiver.

[0045] The filament power conversion circuit 2 sends the filament switching voltage to the filament transformer 6. The filament transformer 6 sends the high-frequency filament switching voltage and the high-frequency focusing pole switching voltage to the filament power supply and modulator 8. The filament power supply and modulator 8 provide filament power supply to the miniaturized traveling wave tube 10, and provide the focusing pole of the miniaturized traveling wave tube 10 with the high-voltage floating carrier modulation pulse signal sent from the pulse isolation transformer 3.

[0046] Specifically, the digital integrated controller 1 collects the spiral voltage and spiral current of the high-voltage power conversion circuit 4, and completes the external reporting to the external host computer through the information bus message.

[0047] When the digital integrated controller 1 acquires the spiral voltage and spiral current of the high-voltage power conversion circuit 4, it completes the acquisition of the spiral voltage and spiral current through an isolation circuit, such as... Figure 2 The diagram shown is a schematic of the isolation circuit for sampling the internal solenoid voltage of a digitally integrated control microwave power module.

[0048] The spiral voltage and spiral current are collected by the resistor sampling network of the high-voltage power supply section in the high-voltage power conversion circuit 4, and then amplified by the first operational amplifier N1A before being sent to the second operational amplifier N1B for proportional adjustment.

[0049] The conditioned voltage or current signal is sent to the analog voltage isolator U1. After signal isolation is completed by magnetic isolation, it is proportionally adjusted by the third operational amplifier N2A and then sent to the fourth operational amplifier N2B to complete emitter follower amplification. After that, the sampling circuit in the digital integrated controller 1 completes the sampling of the solenoid voltage and solenoid current.

[0050] The analog voltage isolator U1 is powered by a power supply between +12V and PGND on the high-voltage power sampling side, and by a power supply between D+12V and GND on the digital integrated controller side, with electrical isolation between the two power supplies.

[0051] In addition, the digital integrated controller 1 also provides filament conversion PWM signals to the filament power conversion circuit 2;

[0052] The digital integrated controller 1 receives external communication bus messages and completes the preheating and transmission command control of the filament power conversion circuit 2.

[0053] Furthermore, the digital integrated controller 1 provides a high-voltage conversion PWM signal to the high-voltage power conversion circuit 4;

[0054] The digital integrated controller 1 receives external communication bus messages and completes high-voltage command control of the high-voltage power conversion circuit 4.

[0055] Combination Figure 3When the digital integrated controller 1 completes the preheating, transmission command control and high voltage command control, the digital integrated controller GPIO in the digital integrated controller 1 sends out the command, which is then sent to the light-emitting diode side of the optocouplers V1 and V3 after passing through the buffer driver U1, and is output to the filament power conversion circuit 2 or the high voltage power conversion circuit 4 respectively, which is equivalent to completing electrical isolation through the optocouplers.

[0056] In addition, the command from the high-voltage power supply side is provided by the pull-up of the phototransistor, which completes the electrical isolation.

[0057] The digital integrated controller 1 achieves electrical isolation between the filament power conversion circuit 2 and the high voltage power conversion circuit 4 through an isolation driver;

[0058] like Figure 4 The diagram shown is a schematic of the isolated drive circuit of the PWM in the digital integrated control microwave power module of the present invention.

[0059] Specifically, the digital integrated controller 1 is equipped with a DPWM (Digital Integrated PWM) function. After the PWM signal is sent out, it undergoes level conversion and decoupling before being sent to the isolation driver N4. The isolation driver N4 achieves electrical isolation between the two circuits through internal capacitor isolation. The signal side of the isolation driver N4 shares a common ground with the digital integrated controller and is powered by VCC. The drive side shares a common ground with the microwave power module input power supply and is powered by a 24V gate power supply.

[0060] The digital integrated controller 1 receives the transmitted pulse from the outside, processes it into a carrier-modulated pulse signal, and then sends it to the pulse isolation transformer 3.

[0061] like Figure 5 The diagram shown is a three-dimensional schematic of the digitally integrated control microwave power module in this embodiment. It can be seen that the digitally integrated control microwave power module of this invention replaces multiple analog controllers with a digitally integrated controller, simplifying the control circuit and reducing its size. The preheating, high-voltage, and transmission commands, as well as the sampling of solenoid voltage and current, of the microwave power module are integrated through a digitally integrated communication bus, simplifying and unifying the previously complex level interfaces and analog interfaces into a single communication bus. Electrical isolation between the digitally integrated controller and the power circuit is achieved through optocouplers, isolation drivers, and transformers, ensuring that abnormal electrical stress will not be applied to the digitally integrated controller via a common ground loop in the event of arcing in the high-voltage power supply or traveling wave tube, thus improving reliability.

[0062] The embodiments described above are merely one implementation method of this application, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A microwave power module with digital integrated control, characterized in that, Includes a digital integrated controller (1), a filament power conversion circuit (2), a pulse isolation transformer (3), a high-voltage power conversion circuit (4), a pre-amplifier (5), a filament transformer (6), a high-voltage power transformer (7), a filament power supply and modulator (8), a high-voltage rectifier and filter circuit (9), and a miniaturized traveling wave tube (10). The digital integrated controller (1) receives external signals and sends them to the filament power conversion circuit (2), the pulse isolation transformer (3), and the high-voltage power conversion circuit (4), respectively. The digital integrated controller (1) receives external communication bus messages and completes attenuation control of the pre-solid-state amplifier (5); The pre-amplifier (5) provides amplified radio frequency signals to the miniaturized traveling wave tube (10); the high-voltage power conversion circuit (4) sends the high-voltage conversion switch voltage to the high-voltage power transformer (7), the high-voltage power transformer (7) sends the converted voltage to the high-voltage rectifier and filter circuit (9), and the high-voltage rectifier and filter circuit (9) provides rectified and filtered voltage to the miniaturized traveling wave tube (10). The filament power conversion circuit (2) sends the filament conversion switching voltage to the filament transformer (6), and the filament transformer (6) sends the high-frequency filament switching voltage and the high-frequency focusing pole switching voltage to the filament power supply and modulator (8). The filament power supply and modulator (8) provide filament power supply to the miniaturized traveling wave tube (10), and provide the focusing pole of the miniaturized traveling wave tube (10) with the high-voltage floating carrier modulation pulse signal sent by the pulse isolation transformer (3).

2. The microwave power module with digital integrated control according to claim 1, characterized in that, The digital integrated controller (1) collects the spiral voltage and spiral current of the high-voltage power conversion circuit (4) and completes the external communication with the host computer through the information bus message.

3. The microwave power module with digital integrated control according to claim 2, characterized in that, When the digital integrated controller (1) collects the spiral voltage and spiral current of the high-voltage power conversion circuit (4): The spiral voltage and spiral current are collected by the high voltage power supply section resistor sampling network in the high voltage power conversion circuit (4), and then amplified by the first operational amplifier before being sent to the second operational amplifier for proportional adjustment. After conditioning, the voltage or current signal is sent to the inside of the analog voltage isolator. After signal isolation is completed by magnetic isolation, it is proportionally adjusted by the third operational amplifier and then sent to the fourth operational amplifier to complete emitter follower amplification. After that, the sampling circuit in the digital integrated controller (1) completes the sampling of the spiral voltage and spiral current.

4. The microwave power module with digital integrated control according to claim 1, characterized in that, The digital integrated controller (1) provides the filament conversion PWM signal to the filament power conversion circuit (2); The digital integrated controller (1) receives external communication bus messages and completes the preheating and transmission command control of the filament power conversion circuit (2).

5. The microwave power module with digital integrated control according to claim 1, characterized in that, The digital integrated controller (1) provides a high-voltage conversion PWM signal to the high-voltage power conversion circuit (4); The digital integrated controller (1) receives external communication bus messages and completes high-voltage command control of the high-voltage power conversion circuit (4).

6. The microwave power module with digital integrated control according to claim 4 or 5, characterized in that, When the digital integrated controller (1) completes the preheating, transmission command control and high voltage command control, the digital integrated controller GPIO in the digital integrated controller (1) sends out the command, which is then sent to the light-emitting diode side of the optocoupler after passing through the buffer driver, and output to the filament power conversion circuit (2) or the high voltage power conversion circuit (4) respectively. The command from the high-voltage power supply side is provided by the pull-up of the phototransistor, which completes the electrical isolation.

7. The microwave power module with digital integrated control according to claim 4 or 5, characterized in that, The digital integrated controller (1) provides electrical isolation between the filament power conversion circuit (2) and the high voltage power conversion circuit (4) and the filament conversion PWM signal and the high voltage conversion PWM signal through the isolation driver. The digital integrated controller (1) is equipped with a digital integrated controller DPWM. After the PWM signal is sent out, it is sent to the isolation driver after level conversion and decoupling. The isolation driver achieves electrical isolation between the two circuits through capacitor isolation.

8. The microwave power module with digital integrated control according to claim 1, characterized in that, The digital integrated controller (1) receives the transmitted pulse from the outside, processes it into a carrier-modulated pulse signal, and then sends it to the pulse isolation transformer (3).

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