An adaptive output DC-DC converter and method for a spaceborne radio frequency T-assembly

Abstract

An adaptive output DC-DC converter and method for a spaceborne radio frequency T-module, comprising: a maximum efficiency point tracker and a DC-DC power converter; the maximum efficiency point tracker includes: a T-module power amplifier output acquisition circuit, a DC-DC power converter output acquisition circuit, an efficiency calculation circuit, and an output control logic unit; performing efficiency calculation to obtain an efficiency value η, and determining a reference voltage V based on the increase or decrease of the efficiency value η in the current sampling period and the previous sampling period. ref Through its own voltage closed-loop control, the output voltage V is made... TX Tracking input reference voltage V ref This invention enables the satellite radio frequency T component power amplifier chip to maintain high efficiency even when it is back off from full power, which can reduce the burden on the thermal control system and improve the efficiency of satellite energy use.

Description

Technical Field

[0001] This invention belongs to the field of space power technology or communication satellite power design technology, and in particular, it relates to an adaptive output DC-DC converter and method for a spaceborne radio frequency T component. Background Technology

[0002] Under normal operating conditions, the receiving power of the TR transmitting component is very low, while the transmitting power accounts for over 90%. According to the satellite's on-orbit service model, when traffic is low, the phased array antenna TR component remains in a power-back-off state or even a silent state for extended periods, and the power consumption of the TR transmitting component (T component) is close to its static power consumption. This operating condition accounts for a high percentage, exceeding 60%. In this case, if the input voltage VTX of the T component's power amplifier (referred to as the T component power amplifier) ​​remains unchanged, maintaining the input voltage in high-power mode, the efficiency of the power amplifier will significantly decrease, leading to increased heat dissipation of the T component. Therefore, it is necessary to optimize the power supply design for providing the input voltage to the T component under this operating condition.

[0003] A typical efficiency curve for a T-component power amplifier is as follows: Figure 1 As shown in the diagram. The horizontal axis represents the amplifier's output power, and the vertical axis represents the amplifier's additional efficiency. Different curves represent different amplifier input voltages. Figure 1 As shown, when the power supply voltage remains constant, the additional efficiency of the power amplifier increases with the increase of the output signal. When the power amplifier is saturated, the efficiency reaches its maximum. If the input signal is further increased, i.e. the amplified signal, the output power will increase, which will reduce the efficiency of the power amplifier. At this time, the power amplifier has already experienced saturation distortion, and the excess energy will appear in the form of harmonics.

[0004] like Figure 1 As shown, when the power amplifier is in low-power output mode (small input signal), appropriately reducing the power amplifier's power supply voltage can maintain a high conversion efficiency, thus avoiding a significant reduction in the amplifier's additional efficiency caused by using a constant power supply voltage under this condition. This will help improve the overall satellite energy utilization efficiency, reduce the burden on the thermal control system, and provide greater flexibility in the design of the overall satellite power system. Figure 2 Taking the example shown, when the power level is reduced from P1 to P2, if the amplifier input voltage remains constant at 4.5V, the amplifier operating point changes from A to E, and the amplifier efficiency decreases. If the amplifier input voltage is then reduced to 4V, the operating point changes from E to C, where the efficiency is greater than at E, meaning the amplifier efficiency increases. Further reducing the voltage to 3.5V changes the operating point from C to B, where the efficiency is greater than at C, meaning the amplifier efficiency continues to increase. Further reducing the voltage to 3V changes the operating point from B to D, where the efficiency is lower than at B, meaning the amplifier efficiency decreases. Therefore, point B is the optimal efficiency operating point at power level P2, with a power supply voltage of 3.5V. Summary of the Invention

[0005] The technical problem solved by this invention is to overcome the shortcomings of the prior art and provide an adaptive output DC-DC converter and method for a spaceborne radio frequency T component. It is applicable to the power amplifier of the spaceborne radio frequency T component and is used for power amplifier power supply voltage regulation. The purpose of voltage regulation is to enable the power amplifier chip to maintain high efficiency when it is back off from full power, reduce the heat dissipation of the T component, and improve the energy efficiency ratio.

[0006] The technical solution of this invention is:

[0007] First aspect

[0008] An adaptive output DC-DC converter for a spaceborne radio frequency T-module includes: a maximum efficiency point tracker and a DC-DC power converter;

[0009] The maximum efficiency point tracker receives the power amplifier output voltage V from the feedback of the T component power amplifier. o and output current I o and the output voltage V of the DC-DC power converter TX and output current I TX The power amplifier output voltage V fed back through the T component power amplifier. o Output current I o and the output voltage V of the DC-DC power converter TX Output current I TX Efficiency calculations are performed to obtain the reference voltage V. ref And output to the DC-DC power converter;

[0010] The DC-DC power converter receives the reference voltage V output from the maximum efficiency point tracker. ref Generates a voltage equal to or greater than the reference voltage V. ref The corresponding output voltage V TX and output current I TX The output voltage V TX and output current I TX The output is supplied to the T-component power amplifier and the maximum efficiency point tracker.

[0011] Preferably, the maximum efficiency point tracker includes: a T-component power amplifier output acquisition circuit, a DC-DC power converter output acquisition circuit, an efficiency calculation circuit, and an output control logic unit;

[0012] The T-component power amplifier output acquisition circuit receives the power amplifier output voltage V fed back from the T-component power amplifier. o and power amplifier output current I o And output it to the efficiency calculation circuit;

[0013] The DC-DC power converter output acquisition circuit receives the output voltage V from the DC-DC power converter.TX and output current I TX And output it to the efficiency calculation circuit;

[0014] The efficiency calculation circuit is based on the power amplifier output voltage V. o Power amplifier output current I o The output voltage V of the DC-DC power converter TX and output current I TX Efficiency calculations are performed to obtain the efficiency value η, and the efficiency value η is output to the output control logic unit.

[0015] The output control logic unit receives the efficiency value η from the efficiency calculation circuit; based on the increase or decrease of the efficiency value η between the current sampling period and the previous sampling period, it determines the reference voltage V. ref It is then output to the DC-DC power converter.

[0016] Preferably, the efficiency calculation circuit obtains the efficiency value η as follows:

[0017]

[0018] P DC =V TX I TX

[0019] P in =V in I in

[0020] P o =V o I o

[0021] Among them, V in and I in The voltage and current of the input signal received by the T component power amplifier.

[0022] Preferably, the output control logic unit determines the reference voltage V. ref Specifically:

[0023] Perform a logical judgment to determine whether the current state needs to be switched. Based on the logical judgment, determine whether the current state is ST1 or ST2, and refer to the reference voltage V from the previous sampling period. r ′ ef Determine the reference voltage V ref ;

[0024] If the state after the logical judgment is ST1, then the reference voltage V ref =V r ′ ef +Δv;

[0025] If the logical judgment results in state ST2, then the reference voltage V ref =V r ′ ef -Δv;

[0026] Where Δv is the reference voltage V ref The step size of the change ranges from 0.1 to 1V.

[0027] Preferably, determining whether the current state needs to be switched involves:

[0028] If the current state is ST1 and the efficiency value η of the current sampling period is greater than or equal to η of the previous sampling period, then the state remains unchanged and is still ST1.

[0029] If the current state is ST1 and the efficiency value η of the current sampling period is smaller than that of the previous sampling period, then the state switches to ST2.

[0030] If the current state is ST2 and the efficiency value η of the current sampling period is greater than or equal to that of the previous sampling period, then the state remains unchanged and is still ST2.

[0031] If the current state is ST2 and the efficiency value η of the current sampling period is smaller than that of the previous sampling period, then the state switches to ST1.

[0032] Secondly,

[0033] A method for voltage regulation using an adaptive output DC-DC converter of a spaceborne radio frequency T-component as described in the first aspect includes:

[0034] The T-component power amplifier output acquisition circuit is used to receive the power amplifier output voltage V fed back from the T-component power amplifier. o and power amplifier output current I o And output it to the efficiency calculation circuit;

[0035] The output voltage V of the DC-DC power converter is received using the output acquisition circuit of the DC-DC power converter. TX and output current I TX And output it to the efficiency calculation circuit;

[0036] Using an efficiency calculation circuit, based on the power amplifier output voltage V o Power amplifier output current I o The output voltage V of the DC-DC power converter TX and output current I TX Efficiency calculations are performed to obtain the efficiency value η, and the efficiency value η is output to the output control logic unit.

[0037] The output control logic unit receives the efficiency value η from the efficiency calculation circuit; based on the increase or decrease of the efficiency value η between the current sampling period and the previous sampling period, the reference voltage V is determined. ref And output to the DC-DC power converter;

[0038] The DC-DC power converter receives the reference voltage V output from the maximum efficiency point tracker. ref Generates a voltage equal to or greater than the reference voltage V. ref The corresponding output voltage V TX and output current I TX The output voltage V TX and output current I TX The output is supplied to the T-component power amplifier and the DC-DC power converter output acquisition circuit.

[0039] Preferably, the method for obtaining the efficiency value η is as follows:

[0040]

[0041] P DC =V TX I TX

[0042] P in =V in I in

[0043] P o =V o I o

[0044] Among them, V in and I in The voltage and current of the input signal received by the T component power amplifier.

[0045] Preferably, the reference voltage V is determined. ref Specifically:

[0046] Perform a logical judgment to determine whether the current state needs to be switched. Based on the logical judgment, determine whether the current state is ST1 or ST2, and refer to the reference voltage V from the previous sampling period. r ′ ef Determine the reference voltage V ref ;

[0047] If the state after the logical judgment is ST1, then the reference voltage V ref =V r ′ ef +Δv;

[0048] If the logical judgment results in state ST2, then the reference voltage V ref =Vr ′ ef -Δv;

[0049] Where Δv is the reference voltage V ref The step size of the change ranges from 0.1 to 1V.

[0050] Preferably, the method for determining whether the current state needs to be switched is as follows:

[0051] If the current state is ST1 and the efficiency value η of the current sampling period is smaller than that of the previous sampling period, then the state switches to ST2.

[0052] If the current state is ST2 and the efficiency value η of the current sampling period is greater than or equal to that of the previous sampling period, then the state remains unchanged and is still ST2.

[0053] If the current state is ST2 and the efficiency value η of the current sampling period is smaller than that of the previous sampling period, then the state switches to ST1.

[0054] The advantages of this invention compared to the prior art are:

[0055] This invention employs an efficiency-voltage dual closed-loop control method, which adaptively adjusts the supply voltage V of the T component power amplifier through an output control logic unit. TX This ensures that the T-component power amplifier always operates in a high-efficiency range, reducing the heat dissipation of the T-component, alleviating the burden on the satellite's thermal control system, and supporting the weight reduction of the entire satellite's energy system. Attached Figure Description

[0056] Figure 1 The power-efficiency curve of the TR component power amplifier;

[0057] Figure 2 This is a schematic diagram illustrating the tracking of the maximum efficiency point.

[0058] Figure 3 Diagram of an adaptive DC-DC converter;

[0059] Figure 4 This is a structural diagram of a DC-DC power converter;

[0060] Figure 5 Logic flowchart for the maximum efficiency point tracker;

[0061] Figure 6 Simulation waveform diagram of adaptive output DC-DC converter. Detailed Implementation

[0062] This invention proposes a power supply voltage adaptive adjustment strategy and implementation method to optimize power amplifier efficiency, thereby finding the optimal efficiency operating point at different power levels and ensuring that the phased array T-module power amplifier operates at that point. To better describe this invention, a detailed explanation is provided below with reference to schematic diagrams.

[0063] like Figure 3 As shown, the adaptive output DC-DC converter proposed in this invention relates to a secondary power supply suitable for satellite RF T-modules. It includes a two-stage structure: the front stage is a maximum efficiency point tracker, and the rear stage is a DC-DC power converter. The two stages are connected in series and together with the T-module power amplifier, form an efficiency-voltage dual-loop feedback. The outer loop is for efficiency feedback, and the inner loop is for voltage feedback.

[0064] The satellite's integrated service unit dynamically determines and adjusts the power level of the phased array antenna T-module with the optimal energy efficiency under the overall satellite traffic volume, and outputs a signal (amplified signal) of corresponding magnitude to the T-module power amplifier according to the power level. The fixed correspondence between traffic volume, power level, and amplified signal is loaded into the satellite's overall service management program.

[0065] The output control logic unit of this invention changes the reference voltage V output by the maximum efficiency point tracker in fixed steps Δv according to its own state (whether it is currently in ST1 or ST2 state) and the increase or decrease of the power amplifier's operating efficiency η. ref .

[0066] The present invention provides an adaptive output DC-DC converter for a spaceborne radio frequency T-component, comprising: a maximum efficiency point tracker and a DC-DC power converter;

[0067] The maximum efficiency point tracker receives the power amplifier output voltage V from the feedback of the T component power amplifier. o and output current I o and the output voltage V of the DC-DC power converter TX and output current I TX Through efficiency calculation and control logic, the output reference voltage V is determined. ref For DC-DC power converters;

[0068] The DC-DC power converter receives the reference voltage V output from the maximum efficiency point tracker. ref Through power electronic conversion, a voltage equivalent to the reference voltage V is generated. ref The corresponding output voltage V TX and output current I TX The output voltage V TX and output current I TX The output is supplied to the T-component power amplifier and the maximum efficiency point tracker.

[0069] The maximum efficiency point tracker includes: a T-component power amplifier output acquisition circuit, a DC-DC power converter output acquisition circuit, an efficiency calculation circuit, and an output control logic unit;

[0070] The T-component power amplifier output acquisition circuit receives the power amplifier output voltage V fed back from the T-component power amplifier. o and power amplifier output current I o And output it to the efficiency calculation circuit;

[0071] The DC-DC power converter output acquisition circuit receives the output voltage V from the DC-DC power converter. TX and output current I TX And output it to the efficiency calculation circuit;

[0072] The efficiency calculation circuit is based on the power amplifier output voltage V. o Power amplifier output current I o The output voltage V of the DC-DC power converter TX and output current I TX Calculate the working efficiency of the T component power amplifier, obtain the efficiency value η, and output the efficiency value η to the output control logic unit;

[0073] The output control logic unit receives the efficiency value η from the efficiency calculation circuit; based on the change in the efficiency value η between the current sampling period and the previous sampling period—that is, whether the efficiency value η increases or decreases compared to the previous sampling period—it determines the reference voltage V. ref It then outputs the voltage to the PI controller in the DC-DC power converter, thereby switching the state in the control logic; different states correspond to different reference voltages V. ref Calculation method, i.e. Figure 5 As shown.

[0074] Example

[0075] like Figure 3 As shown, the input to the maximum efficiency point tracker is the power amplifier output voltage V obtained from the feedback of component T. o and output current I o And the voltage V output from the DC-DC power stage to the T component power amplifier. TX and current I TX Among them, V o and I o That is, the useful signal after being amplified by the T component power amplifier.

[0076] The output of the maximum efficiency point tracker is the reference voltage V. reff This is then fed to the subsequent DC-DC power converter. The maximum efficiency point tracker calculates the efficiency value η of the T-component power amplifier and determines the state switching of the output control logic unit based on the increase or decrease of η.

[0077] ST1 indicates an increased output state, in which the output control logic will increase V. ref .

[0078] ST2 indicates a decrease or maintenance of the output state. In this state, the output control logic will decrease the output V. ref Or maintain the current V ref constant.

[0079] In this embodiment of the invention, the initial state is ST1.

[0080] If the current state is ST1 and the efficiency value η of the current sampling period is greater than or equal to η of the previous sampling period, then the state remains unchanged and is still ST1.

[0081] If the current state is ST1 and the efficiency value η of the current sampling period is smaller than that of the previous sampling period, then the state switches to ST2.

[0082] If the current state is ST2 and the efficiency value η of the current sampling period is greater than or equal to that of the previous sampling period, then the state remains unchanged and is still ST2.

[0083] If the current state is ST2 and the efficiency value η of the current sampling period is smaller than that of the previous sampling period, then the state switches to ST1.

[0084] After the above state determination process is completed, if the state is ST1, then according to formula V... ref =V′ ref +Δv determines the reference voltage V ref The output is then sent to the PI controller of the DC-DC power converter; if the state is ST2, it is determined whether the Vo waveform is distorted at this time. If it is not distorted, then according to the formula V ref =V′ ref -Δv determines the reference voltage V ref The output is then sent to the PI controller of the DC-DC power converter; if Vo is already distorted, then V is maintained. ref constant.

[0085] By adjusting the reference voltage V ref The magnitude of the voltage V controls the output voltage V of the DC-DC power converter. TX This, in turn, controls the power supply voltage and operating efficiency η of the T component power amplifier. The maximum efficiency point tracker continuously adjusts V based on changes in η. ref The magnitude of the power amplifier's efficiency η is always such that it remains constant at different power levels (i.e., different amplified signals V). in and I in The maximum value is obtained under ().

[0086] The subsequent DC-DC power converter is implemented by a full-bridge converter and a full-wave rectifier circuit, such as... Figure 4 As shown. It achieves its output voltage V through its own voltage closed-loop control. TX Tracking input reference voltage V ref and V TX The power amplifier output to component T provides power to the power amplifier.

[0087] 1. Implementation of the maximum efficiency point tracker

[0088] The conversion efficiency of the T-component power amplifier is

[0089]

[0090] P DC =V TX I TX (2)

[0091] P in =V in I in (3)

[0092] P o =V o I o (4)

[0093] V ref =V r ′ ef +Δv(5)

[0094] V ref =V r ′ ef -Δv(6)

[0095] Among them, V TX and I TX V is the DC supply voltage and current output from the DC-DC power converter to the T component power amplifier. in and I in V represents the voltage and current of the input signal received by the T component power amplifier. o and I o These represent the voltage and current output by the power amplifier. (V) o and I o It does not contain harmonic components, only those related to V. in and I in Signals of the same frequency. V ref This is the output of the maximum efficiency point tracker, i.e., the reference voltage supplied to the DC-DC power converter in this sampling period. V r ′ ef This is the value of the reference voltage in the previous sampling period.

[0096] Where Δv is Vref The step size of the change ranges from 0.1 to 1V.

[0097] The maximum efficiency point tracker calculates the magnitude of η using time Δt as the sampling period, and then... Figure 5 The logic shown is adjusted to V. ref Size.

[0098] The state transition diagram of the maximum efficiency point tracker is as follows: Figure 5 As shown. The state bit S represents the current state, and execution proceeds from top to bottom.

[0099] Δt and Δv are adjusted according to the specific application. The principle for selecting Δt is that the frequency corresponding to 1 / Δt is approximately one-tenth of the bandwidth of the DC-DC power converter. At the same time, Δt cannot be too small, and V... ref The transient change in η caused by the transient change in T should have ended, and η should have entered a steady state. Δt should not be too large, so that the adaptive output DC-DC power converter can track the maximum efficiency of the T component power amplifier at a sufficient speed.

[0100] The principle for selecting Δv is that Δv cannot be too large, so that the adaptive output DC-DC converter can track the maximum efficiency of the T-component power amplifier with sufficient accuracy. Δv cannot be too small, so that the adaptive output DC-DC converter can track the maximum efficiency of the T-component power amplifier with sufficient speed.

[0101] like Figure 4 The logic shown is implemented by software within the FPGA, which is embedded on the circuit board of the DC-DC power module. Voltage and current acquisition is achieved using sensors and an analog-to-digital converter (AD) chip.

[0102] Implementation of 2DC-DC power converter

[0103] Satellite antenna arrays have numerous T-module power amplifiers and high power requirements. Therefore, the subsequent DC-DC power converter uses a full-bridge topology with a full-wave rectifier circuit, such as... Figure 4 As shown. The subsequent DC-DC power converter utilizes switching circuits and a controller to adjust its output voltage V. TX Tracking reference value V ref The steady-state output value is equal to V. ref Its closed-loop control bandwidth is more than 10 times greater than that of the previous stage maximum efficiency point tracker.

[0104] Figure 4In this configuration, S1 and S4 have the same on / off state, as do S2 and S3. When S1 and S4 are on, S2 and S3 are off; when S2 and S3 are on, S1 and S4 are off. The output voltage is adjusted by regulating the duty cycle of the switching transistors. Duty cycle adjustment is achieved using a PI (Proportional-Integral) controller. The input to the PI controller is V. ref and V TX The output is a voltage that is linearly proportional to the duty cycle. The PI controller's program is built into the FPGA chip.

[0105] The input voltage of the DC-DC power converter is the satellite bus voltage. The output voltage range is matched to the power supply voltage range required by the power amplifier, typically around 2 to 10V.

[0106] A DC-DC power converter includes: a PI controller, a bridge inverter circuit, and a rectifier circuit; the bridge inverter circuit and the rectifier circuit are cascaded.

[0107] The PI controller receives the output voltage V from the rectifier circuit. TX and the reference voltage V output by the maximum efficiency point tracker ref According to the output voltage V TX and reference voltage V ref Calculate the duty cycle signal; the duty cycle signal is used to control the duty cycle of the electronic switches in the bridge inverter circuit, so that the output voltage V of the rectifier circuit is... TX Tracking reference voltage V ref Changes;

[0108] The electronic switch of the bridge inverter circuit is controlled by the duty cycle signal output by the PI controller, and the output terminal of the bridge inverter circuit is connected to the rectifier circuit.

[0109] The rectifier circuit converts the output voltage V TX and output current I TX The output is supplied to the PI controller, the maximum efficiency point tracker, and the T-component power amplifier.

[0110] The adaptive output DC-DC converter adopts a two-stage series structure (maximum efficiency point tracker and DC-DC power converter), and together with the T-component power amplifier, it forms an efficiency-voltage dual-loop feedback. The outer loop is for efficiency feedback, and the inner loop is for voltage feedback.

[0111] 3. Circuit simulation verification of adaptive voltage regulation DC-DC converter

[0112] To verify the feasibility and implementation method of the proposed adaptive voltage-regulating DC-DC scheme, circuit simulation was performed. The simulation results are as follows: Figure 6As shown in the figure, the simulation curves correspond to the amplified signal level, the amplifier output power Po, the amplifier efficiency η, the current and previous sampled values ​​of the amplifier efficiency in the maximum efficiency point tracker software program, the status flag bit in the maximum efficiency point tracker software program, and the reference voltage V output by the maximum efficiency point tracker. ref .

[0113] It can be seen that during the change of the input voltage range of the T component power amplifier, i.e. the process of the amplified signal, the adaptive voltage regulation DC-DC can adaptively adjust its output, change the input voltage of the power amplifier, so that the power amplifier automatically tracks the maximum efficiency operating point and the T component maintains optimal energy efficiency.

[0114] The present invention has been experimentally verified to reduce the total power consumption of the final stage power chip of approximately 70 T-components in a phased array antenna by about 14.7% using the proposed adaptive DC-DC converter.

[0115] While the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the invention. Any person skilled in the art can make possible variations and modifications to the technical solutions of the present invention using the disclosed methods and techniques without departing from the spirit and scope of the invention. Therefore, any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present invention, without departing from the content of the technical solutions of the present invention, shall fall within the protection scope of the present invention. Where there is no conflict, the embodiments of this application and the technical features thereof can be combined with each other.

[0116] The contents not described in detail in this specification are common knowledge to those skilled in the art.

Claims

1. An adaptive output DC-DC converter for a spaceborne radio frequency T-module, characterized in that, include: Maximum efficiency point tracker and DC-DC power converter; The maximum efficiency point tracker receives the power amplifier output voltage V from the feedback of the T component power amplifier. o and output current I o and the output voltage V of the DC-DC power converter TX and output current I TX ; Efficiency calculations are performed to obtain the reference voltage. And output to the DC-DC power converter; The DC-DC power converter receives the reference voltage output from the maximum efficiency point tracker. Generates and reference voltage The corresponding output voltage V TX and output current I TX The output voltage V TX and output current I TX The output is supplied to the T-component power amplifier and the maximum efficiency point tracker; The maximum efficiency point tracker includes: a T-component power amplifier output acquisition circuit, a DC-DC power converter output acquisition circuit, an efficiency calculation circuit, and an output control logic unit; The T-component power amplifier output acquisition circuit receives the power amplifier output voltage V fed back from the T-component power amplifier. o and power amplifier output current I o And output to the efficiency calculation circuit; The DC-DC power converter output acquisition circuit receives the output voltage V from the DC-DC power converter. TX and output current I TX And output to the efficiency calculation circuit; The efficiency calculation circuit is based on the power amplifier output voltage V. o Power amplifier output current I o The output voltage V of the DC-DC power converter TX and output current I TX Efficiency calculations are performed to obtain the efficiency value η, and the efficiency value η is output to the output control logic unit. The output control logic unit receives the efficiency value η from the efficiency calculation circuit; based on the increase or decrease of the efficiency value η between the current sampling period and the previous sampling period, it determines the reference voltage. It is then output to the DC-DC power converter.

2. The adaptive output DC-DC converter of a spaceborne radio frequency T-assembly according to claim 1, characterized in that, The efficiency calculation circuit obtains the efficiency value η, specifically as follows: Among them, V in and I in The voltage and current of the input signal received by the T component power amplifier.

3. The adaptive output DC-DC converter of a spaceborne radio frequency T-module according to claim 1, characterized in that, The output control logic unit determines the reference voltage. Specifically: Perform a logical judgment to determine whether the current state needs to be switched. Based on the logical judgment, determine whether the current state is ST1 or ST2, and refer to the reference voltage from the previous sampling period. Determine the reference voltage ; If the state after the logical judgment is ST1, then the reference voltage ; If the logical judgment results in state ST2, then the reference voltage... ; Where Δv is the reference voltage The step size of the change ranges from 0.1 to 1V.

4. The adaptive output DC-DC converter of a spaceborne radio frequency T-assembly according to claim 3, characterized in that, To determine whether the current state needs to be switched, the following steps are taken: If the current state is ST1 and the efficiency value η of the current sampling period is greater than or equal to η of the previous sampling period, then the state remains unchanged and is still ST1. If the current state is ST1 and the efficiency value η of the current sampling period is smaller than that of the previous sampling period, then the state switches to ST2. If the current state is ST2 and the efficiency value η of the current sampling period is greater than or equal to that of the previous sampling period, then the state remains unchanged and is still ST2. If the current state is ST2 and the efficiency value η of the current sampling period is smaller than that of the previous sampling period, then the state switches to ST1.

5. A method for voltage regulation using an adaptive output DC-DC converter of a spaceborne radio frequency T-component as described in any one of claims 1 to 4, characterized in that, include: The T-component power amplifier output acquisition circuit is used to receive the power amplifier output voltage V fed back from the T-component power amplifier. o and power amplifier output current I o And output to the efficiency calculation circuit; The output voltage V of the DC-DC power converter is received using the output acquisition circuit of the DC-DC power converter. TX and output current I TX And output to the efficiency calculation circuit; Using an efficiency calculation circuit, based on the power amplifier output voltage V o Power amplifier output current I o The output voltage V of the DC-DC power converter TX and output current I TX Efficiency calculations are performed to obtain the efficiency value η, and the efficiency value η is output to the output control logic unit. The output control logic unit receives the efficiency value η from the efficiency calculation circuit; based on the increase or decrease of the efficiency value η between the current sampling period and the previous sampling period, the reference voltage is determined. And output to the DC-DC power converter; The DC-DC power converter receives the reference voltage output from the maximum efficiency point tracker. Generates and reference voltage The corresponding output voltage V TX and output current I TX The output voltage V TX and output current I TX The output is supplied to the T-component power amplifier and the DC-DC power converter output acquisition circuit.

6. The voltage regulation method according to claim 5, characterized in that, The method for obtaining the efficiency value η is as follows: Among them, V in and I in The voltage and current of the input signal received by the T component power amplifier.

7. The voltage regulation method according to claim 5, characterized in that, Determine the reference voltage Specifically: Perform a logical judgment to determine whether the current state needs to be switched. Based on the logical judgment, determine whether the current state is ST1 or ST2, and refer to the reference voltage from the previous sampling period. Determine the reference voltage ; If the state after the logical judgment is ST1, then the reference voltage ; If the logical judgment results in state ST2, then the reference voltage... ; Where Δv is the reference voltage The step size of the change ranges from 0.1 to 1V.

8. The voltage regulation method according to claim 7, characterized in that, The method for determining whether the current state needs to be switched is as follows: If the current state is ST1 and the efficiency value η of the current sampling period is smaller than that of the previous sampling period, then the state switches to ST2. If the current state is ST2 and the efficiency value η of the current sampling period is greater than or equal to that of the previous sampling period, then the state remains unchanged and is still ST2. If the current state is ST2 and the efficiency value η of the current sampling period is smaller than that of the previous sampling period, then the state switches to ST1.

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