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

Abstract

The invention discloses a high-robustness phased array electronic countermeasure equipment power supply system with feed-forward compensation, and the system achieves the electrical isolation and primary voltage conversion through a high-voltage isolation proportional converter, and achieves the auxiliary power supply of a T / R unit and the power supply of an array plane control circuit through a non-isolation load point converter. The non-isolation proportional converter completes drain power supply of the T / R unit, the cascaded high-voltage isolation proportional converter and non-isolation proportional converter achieve the function similar to an ideal direct-current transformer, the high-voltage direct-current bus capacitor completes system filtering energy storage, and the transfer bus capacitor and the drain power supply capacitor complete matching of a power distribution network. The three-phase active power factor correction circuit completes feed-forward voltage regulation according to the impedance and array plane emission parameters of the power supply system and the working current of the high-voltage direct-current bus collected by the current sampling circuit, and compensates the fluctuation of the supply voltage of the drain electrode caused by the voltage drop conversion of the internal resistance of the power supply system under different loads.

Description

Technical Field

[0001] The invention belongs to the technical field of power supply, 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 when working. The working repetition frequency and working pulse width in the pulse state will change from hundreds of ms to us, 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 nS or even several nS. 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 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-stabilizing 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 existing in 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, wherein:

[0011] The power filter and surge protector are used to filter and suppress EMI in the three-phase alternating current input by 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 alternating current into a high-voltage direct current bus voltage and then send it to M high-voltage isolation proportional converters connected in parallel at the input end. Each high-voltage isolation proportional converter converts the high-voltage direct current 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 respectively; wherein each non-isolated proportional converter is used to provide drain power supply to multiple T / R units of the array surface of the phased array electronic countermeasure equipment, and each non-isolated load point converter is used to provide auxiliary power supply for the multiple T / R units and control power supply for the array surface control circuit; the high-voltage direct current bus capacitor is arranged on the high-voltage direct current bus, the transfer bus capacitor and the drain power supply capacitor are respectively arranged on the transfer bus and the drain power supply line of the T / R unit, and the current sampling circuit is used to collect the working current of the high-voltage direct current 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 is connected in parallel with the drain of the transistor to the positive end of the input voltage Vin, the source of the transistor is connected in parallel with the source of the transistor to the negative end of Vin, the source of the transistor is connected to the drain of the transistor and then 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 is connected to the drain of the transistor, the other end of the resonant capacitor is connected to the drain of the transistor as the output end, and a high-frequency sine wave Vsine is sent out.

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

[0015] Furthermore, the feedforward voltage regulation includes:

[0016] The dynamic feedforward compensation voltage is set according to the array emission parameters and the voltage drop value of the load point of the phased array electronic countermeasure equipment to complete the dynamic feedforward compensation when different array emission parameters are sent down; 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, and completes 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 transmission 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 after the impedance of the power supply system is normalized 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 isolation 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 A to 1 / 8 and K to 1 / 4.

[0025] Furthermore, time t1 is the time when the array transmission parameters are determined. At this time, the three-phase active power factor correction circuit receives the array transmission 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 starts to rise, and the output voltage V OUT ′, that is, the drain supply voltage increases with V OUT The output current I of the non-isolated proportional converter at t2 is the moment when the T / R unit transmits the pulse. OUT ′ changes from the static current when the drain is cut off to the emission current when the drain is turned on. 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 working current of the high-voltage DC bus 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 bus converter and load point converter that supply power to the drain of the array T / R unit. It has no closed-loop feedback loop stability problem, can adapt to any pulse working condition, and has strong anti-load disturbance capability.

[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 working 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 of the array T / R unit through a cascaded open-loop proportional converter, and advances the pulse energy storage capacitor of the system 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 problem, and it can adapt to any pulse working condition, has strong load disturbance resistance and fast transient capability. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It 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 is an equivalent circuit diagram of a 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 It is a schematic diagram of the feedforward compensation voltage and current waveform 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 an equivalent circuit diagram of impedance analysis of the power supply system of the present invention. DETAILED DESCRIPTION

[0039] The present invention provides a highly robust phased array electronic countermeasure equipment power supply system with feedforward compensation, wherein electrical isolation and primary voltage conversion are completed by a high-voltage isolation proportional converter, auxiliary power supply of a T / R unit and power supply of an array control circuit are completed by a non-isolated load point converter, drain power supply of the T / R unit is completed by a non-isolated proportional converter, cascaded high-voltage isolation proportional converters and non-isolated proportional converters realize functions similar to those of an ideal DC transformer, high-voltage DC bus capacitors complete system filtering and energy storage, transfer bus capacitors and drain power supply capacitors complete matching of a distribution network, a three-phase active power factor correction circuit completes feedforward voltage regulation according to power supply system impedance and array emission parameters and high-voltage DC bus operating current collected by a current sampling circuit, and compensates for drain power supply voltage fluctuations caused by voltage drop conversion of the power supply system 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 isolation proportional converter 4, a transfer bus capacitor 5, a non-isolated proportional converter 6, a non-isolated proportional converter 7, a drain power supply capacitor 8 and a current sampling circuit 9, wherein:

[0041] The power filter and surge protector 1 is used to filter the EMI and suppress the surge 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 a non-isolated load point converter 7 respectively; wherein each non-isolated proportional converter 6 is used to provide drain power supply to multiple T / R units of the array surface of the phased array electronic countermeasure equipment, and each non-isolated load point converter 7 is used to provide auxiliary power supply for the multiple T / R units and provide control power supply for the array surface control circuit;

[0042] The high-voltage DC bus capacitor 3 is arranged on the high-voltage DC bus to realize 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, so as to realize the power supply of 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 provide control power to the array control circuit, so as to realize the power supply of the low-power system of the phased array electronic countermeasure equipment array.

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

[0045] The three-phase active power factor correction circuit 2 completes 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 fluctuation caused by the voltage drop transformation of the power supply system internal resistance under different loads.

[0046] The feedforward voltage regulation sets the dynamic feedforward compensation voltage according to the array emission parameters and the load point voltage drop value of the phased array electronic countermeasure equipment, and completes the dynamic feedforward compensation when different array emission parameters are issued; at the same time, 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 working current collected by the current sampling circuit 9, and completes the 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 is connected to the drain of the transistor 44, and the other end of the resonant capacitor 46 and the drain of the transistor 44 are used as output ends to send out a high-frequency sine wave Vsine.

[0048] The switching frequency of the high-voltage isolation proportional converter 4 and the non-isolation 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 sends out a sine wave, completes half a cycle of resonance before the full-bridge switch dead zone, and the bridge arm current returns to zero through resonance before turning on, that is, the switching transistors 41, 42, 44, and 45 are all turned on at zero current, realizing soft switching. The rate 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 fixed frequencies and fixed on-pulse widths, and are in a fixed-frequency and fixed-width operating mode, and 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, it is an equivalent circuit diagram of the high-voltage isolation proportional converter 4 of the present invention. The high-voltage isolation proportional converter 4 is similar to a DC transformer with a transformation ratio coefficient of K. The primary of the high-voltage DC bus side is equivalent to a static working current source 405I in parallel. Q and a controlled current source 406, the current of which 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 isolation 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 transformation 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 of the non-isolated proportional converter 6. IN 'K' times, ignoring 601L in steady-state analysis IN_LEAD ' and 610L OUT_LEAD ′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 waveform of the present invention. The moment 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 The output current I of the non-isolated proportional converter 6 at t2 is the time when the T / R unit transmits the pulse, and the time between t1 and t2 is the launch delay of the phased array electronic countermeasure equipment. OUT ′ changes from the static current when the drain is cut off to the emission current when the drain is turned on. As I OUT ′ changes, V OUT With V OUT′decreases linearly according to the relationship described by formulas (1) and (2); at time 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 between the current sampling circuit 9 and the three-phase active power factor correction circuit 2; at time 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 time t4, after undergoing dynamic feedforward adjustment and steady-state feedforward adjustment, V OUT 'Quickly stabilize at the target voltage.

[0059] like Figure 6 As shown, the schematic diagram of dynamic feedforward compensation of the present invention, the red line is the waveform of the open-loop voltage drop amplitude of the load point output power supply when not compensated with the load current, the blue line is the calculated design value of dynamic feedforward compensation according to the array emission parameters and the load point voltage drop value, and the green line is the expected voltage after adaptive compensation. After the dynamic feedforward compensation, the voltage stabilization of the three-phase active power factor correction circuit 2 is closed-loop feedback based on the input voltage feedback loop of the power factor correction circuit and the externally sent array emission parameter feedback compensation, and the output voltage is linearly compensated according to the externally sent array emission pulse working ratio, and the compensation voltage amplitude is adjusted with the array emission pulse working ratio.

[0060] The voltage fluctuation at the load point during duty ratio conversion is caused by the change in voltage drop due to different currents flowing through the internal resistance of the cascade proportional converter and the impedance of the system harness. 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 working parameters of the system.

[0061] When the voltage compensation is not performed in the full open loop, the array is transmitting a continuous wave (working 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 7As shown, the steady-state feedforward compensation schematic diagram of the present invention, the red line is the waveform of the open-loop voltage drop amplitude of the load point output power supply with the load current when not compensated, the blue line is the calculated design value of the high-voltage DC bus working current collected by the current sampling circuit 9 according to the power supply system impedance, and the green line is the expected voltage after adaptive compensation. After the steady-state feedforward compensation, the voltage stabilization of the three-phase active power factor correction circuit 2 is closed-loop feedback based on the input voltage feedback loop and the input current feedback loop of the power factor correction circuit, and the output voltage is linearly compensated according to the output side current of the three-phase power factor correction circuit 2, and the compensation voltage amplitude is adjusted according to the linear drop of the output voltage caused by the equivalent series internal resistance of the cascaded isolation proportional conversion circuit with the load current.

[0065] When calculating the compensation voltage design value, 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 out The equivalent internal resistance of the non-isolated proportional converter 6 is as follows: Figure 4 R 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 working 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. 1 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), then 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 4INT The equivalent inductance of 8402 after impedance transformation is:

[0073] L INT ×K′ 2 ×K 2

[0074] The input capacitor equivalent series resistance A 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 after impedance transformation C 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 of 8408 after 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 it is 1 / 8, the equivalent capacitance of the output capacitor 8410 becomes 64 times of the original value, 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 of 8411 after 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 impedance transformation of '8602 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 value, 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 embodiment, the output internal resistance 8067 of the non-isolated proportional converter 6 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 impedance of the power supply system harness is equivalent to the load point R PDN ′.

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

[0097] According to the above-mentioned 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, and 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 the drain power supply of the array T / R unit through a cascaded open-loop proportional converter, and completes the feedforward voltage regulation according to the impedance of the power supply system and the array emission parameters and the high-voltage DC bus working current collected by the current sampling circuit by a three-phase active power factor correction circuit. It has no closed-loop feedback response delay and loop stability problems, is adaptable to any pulse working conditions, has strong load disturbance resistance and fast transient capability, and at the same time, the pulse energy storage capacitor of the system 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 power supply at the load point.

[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 embodiments of the present application, and should all be included in the protection scope 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 isolation proportional converter (4), a transfer bus capacitor (5), a non-isolated proportional converter (6), a non-isolated proportional converter (7), a drain power supply capacitor (8) and a current sampling circuit (9), wherein: The power filter and surge protector (1) are used to filter the EMI and suppress the surge in the three-phase alternating current input by 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 alternating current into a high-voltage direct current 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 direct current 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). ; wherein each non-isolated proportional converter (6) is used to provide drain power supply to a plurality of T / R units of a phased array electronic countermeasure equipment array, and each non-isolated load point converter (7) is used to provide auxiliary power supply to the plurality of T / R units and provide control power supply to an 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.

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 gain.

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 a high-voltage isolation proportional converter (4) and a 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, the other end of the resonant capacitor (46) and the drain of the transistor (44) are used 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 three-phase active power factor correction circuit (2) 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 (9).

5. The highly robust phased array electronic countermeasure equipment power supply system with feedforward compensation according to claim 4, characterized in that: The feed-forward voltage regulation comprises: The dynamic feedforward compensation voltage is set according to the array emission parameters and the voltage drop value of the load point of the phased array electronic countermeasure equipment to complete the dynamic feedforward compensation when different array emission parameters are sent down; and: The feedforward voltage regulation also sets a steady-state feedforward compensation voltage according to the impedance of the power supply system and the working current of the high-voltage DC bus collected by the current sampling circuit (9), thereby completing steady-state feedforward compensation when different array transmission parameters are sent down.

6. The highly robust phased array electronic countermeasure equipment power supply system with feedforward compensation according to claim 5, characterized in that: The calculation formula of the dynamic feedforward compensation voltage is: 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 transmission parameters, K, K ′ They are respectively the transformation ratio coefficients of the high-voltage isolation proportional converter (4) and the non-isolation proportional converter (6).

7. The highly robust phased array electronic countermeasure equipment power supply system with feedforward compensation according to claim 5, characterized in that: The calculation formula of the steady-state feedforward compensation voltage is: Among them, V comp2 represents the steady-state feedforward compensation voltage, R pdn represents the result after the impedance of the power supply system is normalized 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 (9), R out represents the equivalent internal resistance of the high-voltage isolation proportional converter (4), R out ′ represents the equivalent internal resistance of the non-isolated proportional converter (6), K, K ′ They are respectively the transformation ratio coefficients of the high-voltage isolation proportional converter (4) and the non-isolation proportional converter (6).

8. The highly robust phased array electronic countermeasure equipment power supply system with feedforward compensation according to claim 6 or 7, characterized in that: The K ′ Set A to 1 / 8 and K to 1 / 4.

9. 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 transmission parameters are determined. At this time, the three-phase active power factor correction circuit (2) receives the array transmission 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 V OUT ′, that is, the drain supply voltage increases with V OUT The output current I of the non-isolated proportional converter (6) at t2 is the moment when the T / R unit transmits the pulse. OUT ′ changes from the static current when the drain is cut off to the emission current when the drain is turned on. As I OUT ′ changes, V OUT With V OUT ' begins 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 working current of the high-voltage DC bus collected by the current sampling circuit (9), until at time t4, the three-phase active power factor correction circuit (2) completes the steady-state feedforward adjustment; after the dynamic feedforward adjustment and the steady-state feedforward adjustment, V OUT 'Quickly stabilize at the target voltage.

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