High-robustness phased array electronic countermeasure equipment power supply system with feedforward compensation

Abstract

The application discloses a high-robust phased array electronic countermeasure equipment power supply system with feedforward compensation, which realizes electrical isolation and primary voltage conversion through a high-voltage isolation proportional transformer, realizes auxiliary power supply of T / R units and power supply of array surface control circuits through a non-isolation load point transformer, realizes anode power supply of the T / R units through a non-isolation proportional transformer, realizes the function of an ideal DC transformer through cascaded high-voltage isolation proportional transformers and non-isolation proportional transformers, realizes system filtering and energy storage through a high-voltage DC bus capacitor, realizes matching of a power distribution network through a transfer bus capacitor and an anode power supply capacitor, and realizes feedforward voltage regulation through a three-phase active power factor correction circuit according to impedance of the power supply system, array surface emission parameters and high-voltage DC bus working current collected by a current sampling circuit, so as to compensate anode power supply voltage fluctuation caused by voltage conversion of voltage drop of the power supply system under different loads.

Description

Technical Field

[0001] The present invention belongs to the technical field of power supplies, and in particular relates to a high-robustness phased array electronic countermeasure equipment power supply system with feedforward compensation. Background Art

[0002] The main power consumption of the power supply system of phased array electronic countermeasure equipment is concentrated in the drain power supply of the T / R unit on the array surface, accounting for more than 80% of the system power supply. This load is the power amplifier transistor of the transmitting unit of the T / R unit array.

[0003] The operating mode of the transmitting unit of the electronic countermeasure equipment is flexible and changeable according to the countermeasure target and countermeasure style. For the transmitting unit power amplifier transistor of the T / R unit array, it may be in a continuous wave state or a pulse state during operation. The working repetition frequency and working pulse width in the pulse state will change from hundreds of milliseconds to microseconds, and the frequency characteristics of the load are changeable.

[0004] In order to radiate electromagnetic waves with higher time domain capability, the RF envelope of the transmitting unit of the electronic countermeasure equipment needs to be as steep as possible, often in the order of tens of nanoseconds or even several nanoseconds. Therefore, the pulse load of the power amplifier transistor of the transmitting unit exhibits strong nonlinearity.

[0005] In order to meet the variable frequency characteristics and strong nonlinearity of the load, the currently designed phased array power supply system for electronic countermeasure equipment needs to add a large number of capacitors at the load end to meet the energy storage of different working pulses, so as to reduce the fluctuation of the load point voltage and at the same time reduce the pulsating current component of the previous system to improve the stability of the system.

[0006] The final converter of the power supply system currently designed is a closed-loop voltage-stabilized converter, which has problems of closed-loop feedback delay and loop stability. Summary of the Invention

[0007] The purpose of the present invention is to provide a highly robust phased array electronic countermeasure equipment power supply system with feedforward compensation to overcome the problems of the prior art in terms of closed-loop feedback delay and loop stability.

[0008] In order to achieve the above tasks, the present invention adopts the following technical solutions:

[0009] A highly robust phased array electronic countermeasure equipment power supply system with feedforward compensation, comprising:

[0010] Power filter and surge protector, three-phase active power factor correction circuit, high-voltage DC bus capacitor, high-voltage isolated proportional converter, transfer bus capacitor, non-isolated proportional converter, non-isolated proportional converter, drain supply capacitor and current sampling circuit, including:

[0011] The power filter and surge protector are used to filter and suppress EMI in the three-phase AC power input to the system and then send it to the three-phase active power factor correction circuit. The three-phase active power factor correction circuit is used to convert the three-phase AC power into a high-voltage DC bus voltage and then send it to M high-voltage isolated proportional converters connected in parallel at the input end. Each high-voltage isolated proportional converter converts the high-voltage DC bus voltage into a transfer bus voltage according to a fixed ratio and then sends it to N non-isolated proportional converters and one non-isolated load point converter. Each non-isolated proportional converter is used to provide drain power to multiple T / R units on the array surface of the phased array electronic countermeasure equipment, and each non-isolated load point converter is used to provide auxiliary power for the multiple T / R units and control power for the array surface control circuit. The high-voltage DC bus capacitor is arranged on the high-voltage DC bus, and the transfer bus capacitor and drain power supply capacitor are respectively arranged on the transfer bus and the drain power supply line of the T / R unit. The current sampling circuit is used to collect the working current of the high-voltage DC bus.

[0012] Furthermore, the high-voltage isolated proportional converter and the non-isolated proportional converter are open-loop converters with fixed voltage gain.

[0013] Furthermore, the power conversion circuit of the high-voltage isolated proportional converter and the non-isolated proportional converter includes: a transistor, a transistor, a transistor, a transistor, a resonant inductor and a resonant capacitor; wherein the drain of the transistor and the drain of the transistor are connected in parallel to the positive end of the input voltage Vin, the source of the transistor and the source of the transistor are connected in parallel to the negative end of Vin, the source of the transistor and the drain of the transistor are connected to one end of the resonant inductor, the other end of the resonant inductor is connected to one end of the resonant capacitor, the source of the transistor and the drain of the transistor are connected, and the other end of the resonant capacitor and the drain of the transistor serve as output ends to send out a high-frequency sine wave Vsine.

[0014] Furthermore, the three-phase active power factor correction circuit completes feedforward voltage regulation according to the power supply system impedance, array emission parameters and the high-voltage DC bus operating current collected by the current sampling circuit.

[0015] Furthermore, the feedforward voltage regulation includes:

[0016] Dynamic feedforward compensation voltage is set based on the array emission parameters and load point voltage drop value of the phased array electronic countermeasure equipment to complete dynamic feedforward compensation when different array emission parameters are issued; and

[0017] The feedforward voltage regulation also sets the steady-state feedforward compensation voltage according to the power supply system impedance and the high-voltage DC bus operating current collected by the current sampling circuit, completing the steady-state feedforward compensation when different array transmission parameters are issued.

[0018] Furthermore, the calculation formula of the dynamic feedforward compensation voltage is:

[0019]

[0020] In the above formula, V comp1 is the dynamic feedforward compensation voltage, V droppol is the preset load point voltage drop value, D% is the duty ratio in the array emission parameters, K, K ′ They are the transformation ratio coefficients of high-voltage isolated proportional converter and non-isolated proportional converter respectively.

[0021] Furthermore, the calculation formula of the steady-state feedforward compensation voltage is:

[0022]

[0023] Among them, V comp2 Represents the steady-state feedforward compensation voltage, R pdn It represents the result of normalizing the impedance of the power supply system to the high-voltage DC bus side, which is determined by harness simulation and testing; I represents the high-voltage DC bus operating current collected by the current sampling circuit, and R out Represents the equivalent internal resistance of the high-voltage isolated proportional converter, R out ′ represents the equivalent internal resistance of the non-isolated proportional converter, K, K ′ They are the transformation ratio coefficients of high-voltage isolated proportional converter and non-isolated proportional converter respectively.

[0024] Furthermore, the K ′ Set to 1 / 8 and K to 1 / 4.

[0025] Furthermore, at time t1, the array emission parameters are determined. At this time, the three-phase active power factor correction circuit receives the array emission parameters and starts to perform dynamic feedforward adjustment of the high-voltage DC bus. At this time, the high-voltage isolation proportional converter output voltage V OUT , that is, the transfer bus voltage begins to rise, and the output voltage V OUT ′, that is, the drain supply voltage increases with V OUT The output current of the non-isolated proportional converter I OUT 'The static current of drain cutoff changes to the emission current of drain conduction, as I OUT ′ changes, V OUT With V OUT′ begins to decrease linearly; at t3, the three-phase active power factor correction circuit adjusts the steady-state feedforward of the high-voltage DC bus according to the high-voltage DC bus working current collected by the current sampling circuit, until t4, the three-phase active power factor correction circuit completes the steady-state feedforward adjustment; after dynamic feedforward adjustment and steady-state feedforward adjustment, V OUT 'Quickly stabilize at the target voltage.

[0026] Compared with the prior art, the present invention has the following technical features:

[0027] 1. High robustness: The highly robust phased array electronic countermeasure equipment power supply system with feedforward compensation of the present invention uses open-loop proportional converters for the busbar converter and the load point converter that supply power to the drain of the array T / R unit. This system has no closed-loop feedback loop stability issues, is adaptable to any pulse operating conditions, and has strong resistance to load disturbances.

[0028] 2. Fast transient response: The highly robust phased array electronic countermeasure equipment power supply system with feedforward compensation of the present invention uses a three-phase active power factor correction circuit to complete feedforward voltage regulation according to the power supply system impedance and array emission parameters and the high-voltage DC bus operating current collected by the current sampling circuit. The load point converter that supplies power to the drain of the array T / R unit is an open-loop proportional converter, and there is no load point closed-loop feedback response delay.

[0029] 3. High power density of the load point converter: The high-robustness phased array electronic countermeasure equipment power supply system with feedforward compensation of the present invention completes the drain power supply of the array T / R unit through a cascaded open-loop proportional converter, and advances the system's pulse energy storage capacitor to the high-voltage DC bus. The load point only needs to match the capacitor of the distribution network, which greatly reduces the load point capacitor and improves the power density of the load point converter.

[0030] It can be seen that the highly robust phased array electronic countermeasure equipment power supply system with feedforward compensation of the present invention completes the drain power supply to the array T / R unit through a cascaded open-loop proportional converter, and advances the system's pulse energy storage capacitor to the high-voltage DC bus. The load point only needs to match the capacitor of the distribution network, which greatly reduces the load point capacitor and improves the power density of the load point converter. There is no closed-loop feedback response delay and loop stability problems, it can adapt to any pulse working conditions, has strong load disturbance resistance, and fast transient capability. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 This is a circuit block diagram of the power supply system of the present invention;

[0032] Figure 2 It is a schematic diagram of a power conversion circuit of a proportional converter of the present invention;

[0033] Figure 3 This is an equivalent circuit diagram of the high-voltage isolation proportional converter of the present invention;

[0034] Figure 4 is an equivalent circuit diagram of a non-isolated proportional converter of the present invention;

[0035] Figure 5 Schematic diagram of the feedforward compensation voltage and current waveforms of the present invention;

[0036] Figure 6 is a schematic diagram of dynamic feed-forward compensation of the present invention;

[0037] Figure 7 is a schematic diagram of steady-state feedforward compensation of the present invention;

[0038] Figure 8 It is the equivalent circuit diagram of the power supply system impedance analysis of the present invention. DETAILED DESCRIPTION

[0039] The present invention provides a highly robust power supply system for phased array electronic countermeasure equipment with feedforward compensation. A high-voltage isolation proportional converter is used to achieve electrical isolation and primary voltage conversion. A non-isolated point-of-load converter is used to provide auxiliary power to a T / R unit and power to an array control circuit. The non-isolated proportional converter is used to provide drain power to the T / R unit. The cascaded high-voltage isolation proportional converter and the non-isolated proportional converter achieve functions similar to those of an ideal DC transformer. High-voltage DC bus capacitors are used to filter and store energy in the system. Transfer bus capacitors and drain supply capacitors are used to match the distribution network. A three-phase active power factor correction circuit performs feedforward voltage regulation based on the impedance of the power supply system, array emission parameters, and the high-voltage DC bus operating current collected by a current sampling circuit, thereby compensating for drain supply voltage fluctuations caused by voltage drop conversion of the power supply system's internal resistance under different loads.

[0040] See attached Figure 1 The present invention provides a highly robust phased array electronic countermeasure equipment power supply system with feedforward compensation, comprising: a power filter and surge protector 1, a three-phase active power factor correction circuit 2, a high-voltage DC bus capacitor 3, a high-voltage isolated proportional converter 4, a transfer bus capacitor 5, a non-isolated proportional converter 6, a non-isolated proportional converter 7, a drain supply capacitor 8, and a current sampling circuit 9, wherein:

[0041] The power filter and surge protector 1 is used to filter and suppress EMI in the three-phase AC power input to the system, and then send it to the three-phase active power factor correction circuit 2. The three-phase active power factor correction circuit 2 is used to convert the three-phase AC power into a high-voltage DC bus voltage and then send it to M high-voltage isolated proportional converters 4 connected in parallel at the input end. Each high-voltage isolated proportional converter 4 converts the high-voltage DC bus voltage into a transfer bus voltage according to a fixed ratio, and then sends it to N non-isolated proportional converters 6 and a non-isolated load point converter 7 respectively; wherein each non-isolated proportional converter 6 is used to provide drain power to multiple T / R units of the phased array electronic countermeasure equipment array, and each non-isolated load point converter 7 is used to provide auxiliary power for the multiple T / R units and provide control power for the array control circuit;

[0042] The high-voltage DC bus capacitor 3 is arranged on the high-voltage DC bus to achieve system filtering and energy storage; the transfer bus capacitor 5 and the drain power supply capacitor 8 are respectively arranged on the transfer bus and the drain power supply line of the T / R unit to complete the matching of the intermediate distribution network and the T / R unit drain distribution network.

[0043] Among them, the non-isolated proportional converter 6 is used to provide drain power to the T / R unit, thereby realizing power supply for the high-power system of the phased array electronic countermeasure equipment array; and the non-isolated load point converter 7 is used to provide auxiliary power to the T / R unit and control power to the array control circuit, thereby realizing power supply for the low-power system of the phased array electronic countermeasure equipment array.

[0044] In this solution, the high-voltage isolated proportional converter 4 and the non-isolated proportional converter 6 are open-loop converters with fixed voltage gains, which realize functions similar to those of an ideal DC transformer.

[0045] The three-phase active power factor correction circuit 2 performs feedforward voltage regulation according to the power supply system impedance, array emission parameters and the high-voltage DC bus working current collected by the current sampling circuit 9, compensating for the drain supply voltage fluctuations caused by the voltage drop transformation of the power supply system internal resistance under different loads.

[0046] The feedforward voltage regulation sets a dynamic feedforward compensation voltage based on the array emission parameters and the load point voltage drop value of the phased array electronic countermeasure equipment, thereby completing dynamic feedforward compensation when different array emission parameters are issued. At the same time, the feedforward voltage regulation also sets a steady-state feedforward compensation voltage based on the power supply system impedance and the high-voltage DC bus operating current collected by the current sampling circuit 9, thereby completing steady-state feedforward compensation when different array emission parameters are issued.

[0047] like Figure 2As shown, the power conversion circuit of the high-voltage isolated proportional converter 4 and the non-isolated proportional converter 6 of the present invention includes: a transistor 41, a transistor 42, a transistor 44, a transistor 45, a resonant inductor 43, and a resonant capacitor 46; wherein the drain of the transistor 41 and the drain of the transistor 45 are connected in parallel to the + end of the input voltage Vin, the source of the transistor 42 and the source of the transistor 44 are connected in parallel to the - end of Vin, the source of the transistor 41 and the drain of the transistor 42 are connected to one end of the resonant inductor 43, the other end of the resonant inductor 43 is connected to one end of the resonant capacitor 46, the source of the transistor 45 and the drain of the transistor 44 are connected, and the other end of the resonant capacitor 46 and the drain of the transistor 44 serve as output ends to send out a high-frequency sine wave Vsine.

[0048] The switching frequency of the high-voltage isolated proportional converter 4 and the non-isolated proportional converter 6 is set to be the same as the resonant frequency of the resonant inductor 43 and the resonant capacitor 46. Then, the power conversion circuit outputs a sine wave, completing half a cycle of resonance before the full-bridge switching dead zone. Before turning on, the bridge arm current returns to zero through resonance, that is, the switching transistors 41, 42, 44, and 45 are all turned on at zero current, achieving soft switching. The power conversion circuit can also participate in the symmetrical half-bridge to complete the sinusoidal resonance, and the principle is the same as Figure 2 same.

[0049] The switching conversion circuits in the high-voltage isolated proportional converter 4 and the non-isolated proportional converter have a fixed frequency and a fixed on-pulse width, and are in a fixed-frequency and fixed-width operating mode. They do not change with the feedback loop and can achieve soft switching under different load and input voltage conditions.

[0050] like Figure 3 As shown in the figure, the equivalent circuit diagram of the high-voltage isolation proportional converter 4 of the present invention is similar to a DC transformer with a ratio coefficient of K. The primary side of the high-voltage DC bus is equivalent to a static working current source 405I in parallel. Q and a controlled current source 406, the current of the controlled current source 406 is the output current I OUT K times, the transfer bus side is equivalent to a controlled voltage source 407, and the voltage across the controlled voltage source is the input voltage V of the high-voltage isolation proportional converter 4 IN K times, 401L is ignored in steady-state analysis IN_LEAD 、402L INT and 411L OUT_LEAD impact.

[0051] The output voltage of the high-voltage isolated proportional converter 4 is:

[0052] V OUT =V IN ×KR OUT ×IOUT (1)

[0053] where R OUT is the equivalent internal resistance of the high-voltage isolation proportional converter 4.

[0054] like Figure 4 As shown in the equivalent circuit diagram of the non-isolated proportional converter 6 of the present invention, the non-isolated proportional converter 6 is similar to a non-isolated DC transformer with a ratio coefficient of K′, and the input side is equivalent to a static working current source 604I in parallel. Q ' and a controlled current source 605, the current of the controlled current source 605 is the output current I OUT ' is K' times, and the output side is equivalent to a controlled voltage source 606. The voltage across the controlled voltage source is the input voltage V IN 'K' times, ignoring 601L in steady-state analysis IN_LEAD ' and 610L OUT_LEAD ′’s influence.

[0055] The output voltage of the non-isolated proportional converter 6 is:

[0056] V OUT ′=V IN ′×K′-R OUT ′×I OUT ′ (2)

[0057] where R OUT ' is the equivalent internal resistance of the non-isolated proportional converter 6.

[0058] like Figure 5 As shown in the figure, it is a schematic diagram of the feedforward compensation voltage and current waveforms of the present invention. Time t1 is the moment when the array emission parameters are determined. At this time, the three-phase active power factor correction circuit 2 receives the array emission parameters and starts to complete the dynamic feedforward adjustment of the high-voltage DC bus. At this time, the high-voltage isolation proportional converter 4 outputs a voltage V OUT , that is, the transfer bus voltage starts to rise, and the output voltage V OUT ′, that is, the drain supply voltage increases with V OUT rises proportionally; t2 is the time when the T / R unit transmits the pulse, t1 to t2 is the time delay of the phased array electronic countermeasure equipment, and t2 is the time when the output current of the non-isolated proportional converter 6 I OUT 'The static current of drain cutoff changes to the emission current of drain conduction, as I OUT ′ changes, V OUT With V OUT′decreases linearly according to the relationship described by formulas (1) and (2); at t3, the three-phase active power factor correction circuit 2 performs steady-state feedforward adjustment on the high-voltage DC bus according to the current sampling feedback signal of the current sampling circuit 9, and the time between t2 and t3 is the response delay of the current sampling circuit 9 and the three-phase active power factor correction circuit 2; at t4, the three-phase active power factor correction circuit 2 completes the steady-state feedforward adjustment, and the time between t3 and t4 is the system stabilization time for the three-phase active power factor correction circuit 2 to complete the steady-state feedforward adjustment; at t4, after undergoing dynamic feedforward adjustment and steady-state feedforward adjustment, V OUT 'Quickly stabilize at the target voltage.

[0059] like Figure 6 Figure 1 shows a schematic diagram of the dynamic feedforward compensation of the present invention. The red line shows the waveform of the open-loop voltage drop amplitude of the load point output power supply in the uncompensated state as a function of the load current. The blue line shows the calculated design value for dynamic feedforward compensation based on the array transmission parameters and the load point voltage drop value. The green line shows the expected voltage after adaptive compensation. After dynamic feedforward compensation, the voltage regulation of the three-phase active power factor correction circuit 2 is based on closed-loop feedback based on the input voltage feedback loop of the power factor correction circuit and the externally input array transmission parameter feedback compensation. The output voltage is linearly compensated based on the externally input array transmission pulse duty ratio, and the compensation voltage amplitude is adjusted according to the array transmission pulse duty ratio.

[0060] The voltage fluctuation at the load point during duty ratio conversion is caused by the internal resistance of the cascaded proportional converter and the voltage drop variation of the current flowing through the system harness impedance. The voltage drop at the load point is linearly related to the duty ratio of the array emission pulse and can be designed and compensated according to the actual operating parameters of the system.

[0061] When voltage compensation is not performed in full open loop, the array transmits continuous waves (duty ratio 100%). Since the voltage at the load point has not changed during dynamic feedforward compensation, the voltage drop value at the load point is set to a preset value V droppol , when the duty ratio in the array transmission parameter is D%, the dynamic feedforward compensation voltage on the high-voltage DC bus side is:

[0062]

[0063] The above formula is the design calculation formula for the dynamic feedforward compensation of the present invention.

[0064] like Figure 7Figure 1 shows a schematic diagram of the steady-state feedforward compensation of the present invention. The red line shows the waveform of the open-loop voltage drop of the load point output power supply as a function of the load current when uncompensated. The blue line shows the calculated design value of the high-voltage DC bus operating current sampled by the current sampling circuit 9 based on the power supply system impedance. The green line shows the expected voltage after adaptive compensation. After the steady-state feedforward compensation, the voltage regulation of the three-phase active power factor correction circuit 2 is based on closed-loop feedback of the input voltage feedback loop and input current feedback loop of the power factor correction circuit. The output voltage is linearly compensated based on the output current of the three-phase power factor correction circuit 2. The compensation voltage amplitude is adjusted according to the linear output voltage drop caused by the equivalent series internal resistance of the cascaded isolated proportional conversion circuit as a function of the load current.

[0065] When calculating the design value of the compensation voltage, the internal resistance of different voltage bus levels in the cascade system needs to be normalized:

[0066] The equivalent internal resistance of the high-voltage isolation proportional converter 4 is as follows: Figure 3 R shown out The equivalent internal resistance of the non-isolated proportional converter 6 is as follows: Figure 4 R shown OUT ', the impedance of the power supply system can be determined by harness simulation and testing. The present invention normalizes the impedance of the power supply system to the high-voltage DC bus side and defines this value as R pdn , the high-voltage DC bus operating current collected by the current sampling circuit 9 is I, and the steady-state feedforward compensation voltage should be:

[0067]

[0068] The above formula is the design calculation formula for the steady-state feedforward compensation of the present invention.

[0069] like Figure 8 As shown in FIG. 1 , the impedance analysis equivalent circuit diagram of the power supply system of the present invention is shown. According to the proportional conversion coefficients K and K of the high-voltage isolation proportional converter 4 and the non-isolation proportional converter 6, ′ Will Figure 3 、 Figure 4 The converter equivalent circuit shown in FIG is analyzed by transforming the impedance to the load point.

[0070] The impedance is transformed to the load point (ie, the T / R unit and the array control circuit), and the input pin inductance L of the high-voltage DC bus side of the high-voltage isolation proportional converter 4 is IN_LEAD The equivalent inductance of 8401 after impedance transformation is:

[0071] L IN_LEAD ×K′ 2 ×K 2

[0072] The internal parasitic inductance L of the high-voltage DC bus side of the high-voltage isolation proportional converter 4 isINT The equivalent inductance of 8402 after impedance transformation is:

[0073] L INT ×K′ 2 ×K 2

[0074] The equivalent series resistance A of the input capacitor of the high-voltage isolation proportional converter 4 CIN_ESR The equivalent resistance value of 8403 after impedance transformation is:

[0075] R CIN_ESR ×K′ 2 ×K 2

[0076] The input capacitor C of the high-voltage isolation proportional converter 4 IN 8403 equivalent capacitance C after impedance transformation IN for:

[0077]

[0078] Generally, when K ′ When K is 1 / 8 and K is 1 / 4, the equivalent capacitance of the input capacitor 8403 becomes 1024 times of the original value, which can greatly improve the energy storage effect and greatly reduce the subsequent energy storage capacitor, so as to improve the power density of the non-isolated proportional converter 6 as a load point converter.

[0079] The output internal resistance R of the high-voltage isolation proportional converter 4 OUT The equivalent resistance value after 8408 impedance transformation is:

[0080] R OUT ×K′ 2

[0081] The output capacitor equivalent series resistance R of the high-voltage isolation proportional converter 4 COUT_ESR The equivalent resistance value of 8409 after impedance transformation is:

[0082] R COUT_ESR ×K′ 2

[0083] The output capacitor C of the high-voltage isolation proportional converter 4 OUT The equivalent capacitance of 8410 after impedance transformation is:

[0084]

[0085] Generally, when K ′When the capacitance is 1 / 8, the equivalent capacitance of the output capacitor 8410 becomes 64 times of the original capacitance, which can greatly improve the energy storage effect and greatly reduce the output capacitor 8608 of the non-isolated proportional converter 6, so as to improve the power density of the non-isolated proportional converter 6 as a load point converter.

[0086] The output lead inductance L of the high-voltage isolation proportional converter 4 OUT_LEAD The equivalent inductance after 8411 impedance transformation is:

[0087] L OUT_LEAD ×K′ 2

[0088] The input lead inductance L of the non-isolated proportional converter 6 IN_LEAD The equivalent inductance of 8601 after impedance transformation is:

[0089] L IN_LEAD ×K′ 2

[0090] The input capacitor equivalent series resistance R of the non-isolated proportional converter 6 CIN_ESR The equivalent resistance value after '8602 impedance transformation is:

[0091] R CIN_ESR ′×K′ 2

[0092] The input capacitor C of the non-isolated proportional converter 6 IN The equivalent capacitance after impedance transformation of '8603 is:

[0093]

[0094] Generally, when K ′ When it is 1 / 8, the equivalent capacitance of the input capacitor 8603 becomes 64 times of the original, which can greatly improve the energy storage effect and greatly reduce the output capacitor 8608 of the non-isolated proportional converter 6, so as to improve the power density of the non-isolated proportional converter 6 as a load point converter.

[0095] exist Figure 8 In the non-isolated proportional converter 6, the output internal resistance 8067 is R OUT ′, the output capacitor equivalent series resistance 8068 is R OUT_ESR ', the output capacitor 8609 is C OUT ', the output lead inductance 8610 is L OUT_LEAD '; The power supply system harness impedance equivalent to the load point is R PDN ′.

[0096] Phased array load point T / R unit drain switch 8004 is S D, the equivalent resistance of the transmitting power consumption is 8004, R T , the equivalent series resistance of the load point capacitor is 8002, R POL_ESR The capacitance of the load point capacitor 8003 is C POL .

[0097] According to the above equivalent impedance network, the pulse energy storage capacitor of the T / R unit can be completed by the front-stage capacitor 8404, capacitor 8410, and capacitor 8603. The load capacitor 8003 only needs to complete the transient matching of the equivalent PDN parasitic parameters of the power supply system.

[0098] The highly robust phased array electronic countermeasure equipment power supply system with feedforward compensation of the present invention completes drain power supply to the array T / R unit through cascaded open-loop proportional converters. The three-phase active power factor correction circuit completes feedforward voltage regulation according to the power supply system impedance, array emission parameters, and the high-voltage DC bus operating current collected by the current sampling circuit. It has no closed-loop feedback response delay and loop stability issues, adapts to any pulse operating condition, has strong load disturbance resistance, and fast transient capability. At the same time, the system's pulse energy storage capacitor is advanced to the high-voltage DC bus, and the load point only needs to match the capacitor of the distribution network, which greatly reduces the load point capacitor and improves the power density of the load point power supply.

[0099] The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present application, and should all be included in the scope of protection of the present application.

Claims

1. A highly robust phased array electronic countermeasure equipment power supply system with feedforward compensation, characterized in that: include: A power filter and surge protector (1), a three-phase active power factor correction circuit (2), a high-voltage DC bus capacitor (3), a high-voltage isolated proportional converter (4), a transfer bus capacitor (5), a non-isolated proportional converter (6), a non-isolated point-of-load converter (7), a drain supply capacitor (8), and a current sampling circuit (9), wherein: The power filter and surge protector (1) is used to filter EMI and suppress surges in the three-phase AC power input to the system and then send it to the three-phase active power factor correction circuit (2). The three-phase active power factor correction circuit (2) is used to convert the three-phase AC power into a high-voltage DC bus voltage and then send it to M high-voltage isolation proportional converters (4) connected in parallel at the input end. Each high-voltage isolation proportional converter (4) converts the high-voltage DC bus voltage into a transfer bus voltage according to a fixed ratio and then sends it to N non-isolated proportional converters (6) and one non-isolated load point converter (7). Each non-isolated proportional converter (6) is used to provide drain power to a plurality of T / R units on the array of a phased array electronic countermeasure device, and each non-isolated point-of-load converter (7) is used to provide auxiliary power to the plurality of T / R units and control power to the array control circuit; the high-voltage DC bus capacitor (3) is arranged on the high-voltage DC bus, the transfer bus capacitor (5) and the drain power supply capacitor (8) are respectively arranged on the transfer bus and the drain power supply line of the T / R unit, and the current sampling circuit (9) is used to collect the working current of the high-voltage DC bus; The three-phase active power factor correction circuit (2) performs feedforward voltage regulation according to the power supply system impedance, the array emission parameters and the high-voltage DC bus operating current collected by the current sampling circuit (9); The feedforward voltage regulation includes: Dynamic feedforward compensation voltage is set based on the array emission parameters and load point voltage drop value of the phased array electronic countermeasure equipment to complete dynamic feedforward compensation when different array emission parameters are issued; and The feedforward voltage regulation also sets a steady-state feedforward compensation voltage according to the power supply system impedance and the high-voltage DC bus operating current collected by the current sampling circuit (9), thereby completing steady-state feedforward compensation when different array emission parameters are issued.

2. The highly robust phased array electronic countermeasure equipment power supply system with feedforward compensation according to claim 1, characterized in that: The high-voltage isolation proportional converter (4) and the non-isolation proportional converter (6) are open-loop converters with fixed voltage gains.

3. The highly robust phased array electronic countermeasure equipment power supply system with feedforward compensation according to claim 1, characterized in that: The power conversion circuit of the high-voltage isolation proportional converter (4) and the non-isolation proportional converter (6) comprises: a transistor (41), a transistor (42), a transistor (44), a transistor (45), a resonant inductor (43) and a resonant capacitor (46); wherein the drain of the transistor (41) and the drain of the transistor (45) are connected in parallel to the positive end of the input voltage Vin, the source of the transistor (42) and the source of the transistor (44) are connected in parallel to the negative end of Vin, the source of the transistor (41) and the drain of the transistor (42) are connected to one end of the resonant inductor (43), the other end of the resonant inductor (43) is connected to one end of the resonant capacitor (46), the source of the transistor (45) and the drain of the transistor (44) are connected, and the other end of the resonant capacitor (46) and the drain of the transistor (44) serve as output ends to send out a high-frequency sine wave Vsine.

4. The highly robust phased array electronic countermeasure equipment power supply system with feedforward compensation according to claim 1, characterized in that: The calculation formula of the dynamic feedforward compensation voltage is: In the above formula, is the dynamic feedforward compensation voltage, is the preset load point voltage drop value, D% is the duty ratio in the array emission parameters, K 、 are the transformation ratio coefficients of the high-voltage isolation proportional converter (4) and the non-isolation proportional converter (6) respectively.

5. The highly robust phased array electronic countermeasure equipment power supply system with feedforward compensation according to claim 1, characterized in that: The calculation formula of the steady-state feedforward compensation voltage is: in, Represents the steady-state feedforward compensation voltage, R pdn This represents the impedance of the power supply system normalized to the high-voltage DC bus side, determined through harness simulation and testing. I represents the high-voltage DC bus operating current collected by the current sampling circuit (9), R out represents the equivalent internal resistance of the high-voltage isolation proportional converter (4), represents the equivalent internal resistance of the non-isolated proportional converter (6), K 、 are the transformation ratio coefficients of the high-voltage isolation proportional converter (4) and the non-isolation proportional converter (6) respectively.

6. The highly robust phased array electronic countermeasure equipment power supply system with feedforward compensation according to claim 4 or 5, characterized in that: described Set to 1 / 8, K Set to 1 / 4.

7. The highly robust phased array electronic countermeasure equipment power supply system with feedforward compensation according to claim 1, characterized in that: Time t1 is the time when the array emission parameters are determined. At this time, the three-phase active power factor correction circuit (2) receives the array emission parameters and starts to perform dynamic feedforward adjustment of the high-voltage DC bus. At this time, the high-voltage isolation proportional converter (4) outputs a voltage V OUT , that is, the transfer bus voltage starts to rise, and the output voltage of the non-isolated proportional converter (6) , that is, the drain supply voltage increases with V OUT The output current of the non-isolated proportional converter (6) at t2 is the moment when the T / R unit transmits the pulse. The static current of drain cutoff changes to the emission current of drain conduction. Change, V OUT and It starts to decrease linearly; at time t3, the three-phase active power factor correction circuit (2) adjusts the steady-state feedforward of the high-voltage DC bus according to the high-voltage DC bus working current collected by the current sampling circuit (9), until the three-phase active power factor correction circuit (2) completes the steady-state feedforward adjustment at time t4; after the dynamic feedforward adjustment and the steady-state feedforward adjustment, Quickly stabilize at the target voltage.

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