A fast load response phased array equipment power supply system of a transfer bus architecture

Abstract

This invention discloses a fast load response phased array equipment power supply system with a relay bus architecture, comprising: a power filter and surge protector, a three-phase active power factor correction circuit, a bus converter array, a fast-response non-isolated point-of-load (POLO) converter, and a non-isolated POLO converter. The parallel redundant bus converter array completes electrical isolation and voltage conversion from the high-voltage DC bus to the relay bus. The non-isolated POLO converter provides auxiliary power supply for the T / R units of the phased array equipment and power supply for the array control circuit. The fast-response non-isolated POLO converter provides drain power supply for the T / R units. This invention's fast load response phased array equipment power supply system with a relay bus architecture, through parallel redundant bus converters cascaded with distributed fast-response non-isolated POLO converters, completes drain power supply for the array T / R units, improving the reliability of the power supply system and enhancing the power density and transient response capability of the POLO converters.

Description

Technical Field

[0001] This invention relates to the field of power supply technology, and more specifically to a fast load response phased array device power supply system with a relay bus architecture. Background Technology

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

[0003] The operating modes of the transmitting unit of a phased array device are flexible and varied. For the power amplifier transistor of the transmitting unit of the T / R unit array, it may be in continuous wave mode or pulse mode. In pulse mode, the operating repetition frequency and operating pulse width will change from hundreds of milliseconds to microseconds, and the frequency characteristics of the load are varied.

[0004] To meet the varying frequency characteristics and strong nonlinearity of the load, the current phased array equipment power supply system requires the addition of a large number of capacitors at the load end to store energy for different operating pulses, thereby reducing voltage fluctuations at the load point and reducing the pulsating current component to the upstream system to improve system stability.

[0005] The power supply system currently designed is either a centralized power supply system or a distributed power supply system. Centralized power supply cannot achieve fast response and accurate voltage regulation at the load end of the T / R unit array. Traditional distributed power supply systems achieve voltage regulation at the load end of the T / R unit array through brick-type modules with isolation transformation and regulation. The transient response is slow, and a large number of output capacitors are required to ensure voltage drop during pulse operation. Summary of the Invention

[0006] The purpose of this invention is to provide a fast load response phased array equipment power supply system with a transfer bus architecture, so as to improve the power density and transient response capability of the load point converter.

[0007] To achieve the above objectives, the present invention employs the following technical solution:

[0008] A fast load response phased array power supply system with a relay bus architecture includes: a power filter and surge protector, a three-phase active power factor correction circuit, a bus converter array, a fast response non-isolated point-of-load converter, and a non-isolated point-of-load converter.

[0009] Parallel redundant bus converter arrays complete electrical isolation and voltage conversion from high-voltage DC bus to transfer bus; non-isolated load point converters complete auxiliary power supply for the T / R unit of phased array equipment and power supply for array control circuit; fast-response non-isolated load point converters complete drain power supply for T / R unit.

[0010] The power filter and surge protector perform EMI filtering and surge suppression on the input three-phase AC power before sending it to the three-phase active power factor correction circuit. The three-phase active power factor correction circuit converts the three-phase AC power into a stable high-voltage DC bus voltage and then sends it to the bus converter array at the input end. The bus converter array converts the high-voltage DC bus voltage into a transfer bus voltage and then sends it to the non-isolated point-of-load converter and multiple fast-response non-isolated point-of-load converters. The transfer bus voltage output by the bus converter is set to an integer multiple of the output voltage of the fast-response non-isolated point-of-load converter. The fast-response non-isolated point-of-load converter performs step-down and voltage regulation at a preset duty cycle. Each fast-response non-isolated point-of-load converter provides drain power to multiple T / R units of the phased array device.

[0011] Furthermore, the bus converter is a step-down converter with electrical isolation between the input and output terminals. The bus converter is configured in M+N blocks. The normal operation of the system is guaranteed as long as N out of the N+M bus converters are working properly. The M+N bus converter array is started sequentially in a time-sharing manner.

[0012] Furthermore, the intermediate bus voltage output by the bus converter is twice the output voltage of the fast response non-isolated point-of-load converter, and the duty cycle of the fast response non-isolated point-of-load converter is 50%.

[0013] Furthermore, after multiple fast-response non-isolated point-of-load converters synchronize the switching of their internal multiphase interleaved buck circuits through a frequency synchronization signal, the high-frequency ripple output by the fast-response non-isolated point-of-load converter array is also synchronized, as are the parasitic radio frequency spurious emissions caused by the high-frequency ripple of the drain power supply of the T / R unit, thus synchronizing random broadband noise into point-frequency spurious emissions.

[0014] Furthermore, when the power supply of the phased array equipment T / R unit is a multi-point grounding system, the negative terminal of the relay bus output by the bus converter is grounded with low resistance.

[0015] Furthermore, if the T / R unit power supply of the phased array device is a single-point grounding system, then:

[0016] When the bus converter and the fast-response non-isolated point-of-load converter are not in the same physical structure, the positive and negative terminals of the intermediate bus output by the bus converter are grounded through film capacitors; when they are in the same physical structure, the positive and negative terminals of the high-voltage DC bus input by the bus converter are grounded through film capacitors, and the negative terminal of the intermediate bus is grounded through the far end of the T / R unit.

[0017] Furthermore, an automatic switching transistor V1 is connected in series at the positive output terminal of the bus converter. The bus converter automatically turns on when there is voltage at the output and automatically turns off when there is no voltage. Resistors R2 and R3 are sequentially arranged between the positive and negative output terminals of the bus converter, while resistors R5 and R6 are connected in series with transistor V2 between the positive and negative output terminals of the bus converter. One end of resistor R1 is connected to the gate of transistor V1, and the other end is connected between resistors R5 and R6. One end of resistor R4 is connected between resistors R2 and R3, and the other end is connected to the gate of transistor V2. The source of transistor V2 is grounded.

[0018] Furthermore, when the bus converter output voltage is normal, the series-connected R2 and R3 complete the voltage divider, providing the gate voltage to transistor V2 through R4, thus turning on V2. After V2 turns on, R6 is connected to the negative output terminal of the bus converter. The series-connected R5 and R6 complete the voltage divider, providing the gate voltage to transistor V1 through R1, thus turning on V1, completing the parallel connection. When the bus converter output voltage is abnormal, the series-connected R2 and R3 cannot form a voltage divider circuit and cannot provide the gate voltage for V2 to turn on, so V2 turns off. After V2 turns off, the series-connected R5 and R6 cannot form a voltage divider circuit and cannot provide the gate voltage for transistor V1 to turn on, so V1 turns off, completing the automatic disconnection of the faulty bus converter 3.

[0019] Furthermore, the fast-response non-isolated point-of-load converter is a synchronous buck multiphase interleaved buck regulator circuit.

[0020] Furthermore, the feedback loop of the fast-response non-isolated point-of-load converter is equipped with a multi-phase interleaved buck circuit, an output rectifier and filter circuit, a sampling circuit, and a switching control circuit.

[0021] Furthermore, the power-on startup process of the fast load response phased array equipment power supply system of the aforementioned relay bus architecture is as follows:

[0022] (a) When the input three-phase AC power is applied, the power filter and surge protector work normally;

[0023] (b) The three-phase active power factor correction circuit starts and outputs DC power to the high-voltage DC bus;

[0024] (c) The M+N bus converter arrays are started sequentially in a time-sharing manner;

[0025] (d) The non-isolated load point converter starts up to supply power to the array control circuit of the phased array equipment, and at the same time provides auxiliary power to the T / R unit of the phased array equipment;

[0026] (e) Enable / disable the array control confirmation T / R unit of the phased array equipment;

[0027] (f) Fast-response non-isolated point-of-load converter startup, providing power to the drain of the T / R unit;

[0028] (g) Check if the output current of each fast response non-isolated point-of-load converter is normal. If there is an abnormality, go back to step (f) and disable the fast response non-isolated point-of-load converter with abnormal output. If it is normal, execute (h).

[0029] (h) Enable the T / R unit;

[0030] (i) Power on is complete.

[0031] Compared with the prior art, the present invention has the following technical features:

[0032] 1. High mission reliability: The fast load response phased array equipment power supply system of the relay bus architecture of this invention uses an M+N parallel redundant bus converter array to complete electrical isolation and voltage transformation from the high voltage DC bus to the relay bus, ensuring high reliability of the bus converter stage. The load point completes the zoned power supply through the fast response non-isolated converter. Even if some area T / R units or fast response non-isolated load point converters fail, other areas can still operate normally. The failure of a small number of area T / R units does not affect the normal operation of the phased array equipment, resulting in high mission reliability.

[0033] 2. Fast transient response: The fast load response phased array power supply system of the relay bus architecture of this invention completes the electrical isolation and primary voltage transformation by the bus converter array. The load point converter that supplies power to the T / R unit is a non-isolated multi-phase interleaved synchronous buck regulator circuit with optimized voltage gain. There is no feedback delay or electrical isolation effect of the power loop. The load point converter has a high crossover frequency and fast transient response.

[0034] 3. High power density of the load point converter: The fast load response phased array power supply system of the intermediate bus architecture of this invention completes the electrical isolation and primary voltage transformation by the bus converter array. The load point converter eliminates the high-voltage components and isolation power transformer required for high-voltage DC bus input transformation, and the load point converter has high power density.

[0035] As can be seen, the fast load response phased array equipment power supply system of the relay bus architecture of the present invention completes the drain power supply of the phase T / R unit by cascading distributed fast response non-isolated load point converters through parallel redundant bus converters. This achieves precise voltage regulation power supply to the load end of the phase T / R unit while improving the task reliability of the power supply system and increasing the power density and transient response capability of the load point converter. Attached Figure Description

[0036] Figure 1This is a block diagram of the power supply system for the fast load response phased array equipment of the relay bus architecture of the present invention;

[0037] Figure 2 This is a schematic diagram of the power supply system grounding when the present invention is applied to a multi-point grounding system;

[0038] Figure 3 This is a grounding diagram of the power supply system when the present invention is applied to a single-point grounding system and the bus converter, fast-response non-isolated load point converter, and non-isolated load point converter are not in the same physical structure.

[0039] Figure 4 This is a grounding diagram of the power supply system when the present invention is applied to a single-point grounding system and the bus converter, fast-response non-isolated load point converter, and non-isolated load point converter are in the same physical structure.

[0040] Figure 5 This is a schematic diagram of the automatic switching circuit for parallel redundant output of the bus converter of the present invention;

[0041] Figure 6 This is a schematic diagram of the feedback loop of the fast-response non-isolated point-of-load converter of the present invention;

[0042] Figure 7 This is the circuit diagram of the non-isolated multiphase interleaved synchronous buck regulator of the fast response non-isolated point-of-load converter of the present invention;

[0043] Figure 8 This is the Bode plot of the fast-response non-isolated point-of-load converter of the present invention;

[0044] Figure 9 This is a simulation waveform diagram of the transient response of the fast-response non-isolated point-of-load converter of the present invention;

[0045] Figure 10 This is a schematic diagram of the feedback loop of an isolated point-of-load converter;

[0046] Figure 11 This is the Bode plot of an isolated point-of-load converter;

[0047] Figure 12 This is a simulation waveform diagram of the transient response of an isolated point-of-load converter;

[0048] Figure 13 This is a flowchart illustrating the power-on startup process of the fast load response phased array equipment power supply system based on the relay bus architecture of this invention. Detailed Implementation

[0049] This invention provides a fast load response phased array power supply system with a relay bus architecture. Electrical isolation and voltage conversion from the high-voltage DC bus to the relay bus are achieved through a bus converter. A non-isolated point-of-load converter provides auxiliary power to the T / R units and power to the array control circuit. A fast-response non-isolated proportional converter provides drain power to the T / R units. This fast load response phased array power supply system uses cascaded distributed fast-response non-isolated point-of-load converters connected in parallel to partitioned bus converters to provide drain power to the array T / R units. This achieves precise voltage regulation at the load end of the array T / R units while improving the reliability of the power supply system and increasing the power density and transient response capability of the point-of-load converters.

[0050] See appendix Figure 1 The present invention provides a fast load response phased array power supply system for a relay bus architecture, comprising: a power filter and surge protector 1, a three-phase active power factor correction circuit 2, a bus converter array 3, a fast response non-isolated point-of-load converter 4, and a non-isolated point-of-load converter 5.

[0051] The M+N block parallel redundant bus converter 3 array completes electrical isolation and voltage transformation from the high-voltage DC bus to the transfer bus. The non-isolated load point converter 5 completes the auxiliary power supply of the T / R unit of the phased array equipment and the power supply of the array control circuit. The fast-response non-isolated load point converter 4 completes the drain power supply of the T / R unit.

[0052] The power filter and surge protector 1 performs EMI filtering and surge suppression on the input three-phase AC power before sending it to the three-phase active power factor correction circuit 2. The three-phase active power factor correction circuit 2 converts the three-phase AC power into a stable high-voltage DC bus voltage and then sends it to the bus converter 3 array at the input end. The bus converter 3 array converts the high-voltage DC bus voltage into a transfer bus voltage and then sends it to the non-isolated point-of-load converter 5 and multiple fast-response non-isolated point-of-load converters 4. The transfer bus voltage output by the bus converter 3 is set to twice the output voltage of the fast-response non-isolated point-of-load converter 4. The fast-response non-isolated point-of-load converter 4 performs step-down voltage regulation at a duty cycle of 50%. Each fast-response non-isolated point-of-load converter 4 provides drain power to i T / R units of the phased array device.

[0053] In this scheme, bus converter 3 is a buck converter with electrical isolation between its input and output terminals, and the failure rate of a single bus converter 3 is λ. i The failure rate of the N parallel non-redundant bus converter 3-array is:

[0054] λ N =N×λ i

[0055] The mean time between failures (MTBF) value is:

[0056]

[0057] The failure model of the N+M parallel redundant bus converter 3 array is an N / (N+M) structure system, that is, the normal operation of the system can be guaranteed as long as N out of the N+M bus converters 3 are working normally.

[0058] The system's MTBF value is:

[0059]

[0060] If N = 20 and M = 2, then:

[0061] The MTBF value of an N-block parallel non-redundant bus converter 3-array is:

[0062] The MTBF value of the N+M block parallel redundant bus converter 3 array is: Right now

[0063] The calculated value is as follows: MTBF N+M =2.86×MTBF N .

[0064] That is, the bus converter redundancy was increased by 10%, the mean time between failures was increased by 2.86 times, and the system failure rate was reduced to 35% of the original.

[0065] Therefore, this invention significantly improves the mission reliability of the bus converter 3 array through parallel redundancy of N+M bus converters 3; the T / R units at the load points are powered by a distributed array of fast-response non-isolated converters 4, ensuring normal operation in other areas even if some T / R units or fast-response non-isolated load point converters fail. The failure of a small number of T / R units does not affect the normal operation of the phased array equipment, resulting in high system mission reliability. The M+N bus converter 3 array is started sequentially in a time-sharing manner.

[0066] In this scheme, the intermediate bus voltage output by bus converter 3 is designed to be twice the output voltage of fast response non-isolated point-of-load converter 4. The duty cycle of fast response non-isolated point-of-load converter 4 is 50%. Therefore, the steady-state operating point of each phase synchronous buck converter is at the dynamic optimal point of the BUCK converter, which improves the response speed of each phase synchronous buck converter. The duty cycle of each phase synchronous buck converter is 50%, the BUCK inductor current waveform is symmetrical, and the multi-phase interleaving cancellation effect is optimal. The duty cycle of each phase synchronous buck converter is 50%. In ultra-fast response requirements, the response speed can be significantly improved through nonlinear control strategies such as continuous conduction.

[0067] In this scheme, multiple fast-response non-isolated point-of-load converters 4 synchronize the switching of the internal multiphase interleaved buck circuit through a frequency synchronization signal. The high-frequency ripple output of the fast-response non-isolated point-of-load converter 4 array powered by the T / R unit is synchronized with the switching of the internal multiphase interleaved buck circuit. After synchronization is achieved through an external frequency synchronization signal, the high-frequency ripple output of the fast-response non-isolated point-of-load converter 4 array is also synchronized. The parasitic radio frequency spurious emissions caused by the high-frequency ripple of the drain power supply of the T / R unit are also synchronized, and the random broadband noise is synchronized into point frequency spurious emissions, thereby improving the emission spurious emission performance of the phased array equipment.

[0068] Below Figure 2 , Figure 3 In the power supply system of the phased array equipment analyzed, the load point converter, namely the fast response non-isolated load point converter 4, is not integrated with the T / R unit in the same module. If it is effectively grounded in the same module, there will be no common-mode noise to ground from the transfer bus at the input terminal of the fast response non-isolated load point converter 4, and there will be no different grounding treatment measures in different systems.

[0069] like Figure 2 As shown, this invention is applied to a power supply system grounding diagram when it is used in a multi-point grounding system. When the power supply of the phased array equipment T / R unit is a multi-point grounding system, the negative terminal of the transfer bus output by the bus converter 3 is grounded with low resistance.

[0070] In a multi-point grounding system, the drain power supply has a separate low-resistance power supply circuit, and the negative end of the transfer bus is grounded with low resistance. The common-mode noise of the transfer bus to ground is suppressed through grounding, thereby improving the electromagnetic compatibility of the system.

[0071] like Figure 3 The present invention is applied to a single-point grounding system and the bus converter 3 and the fast-response non-isolated load point converter 4 and non-isolated load point converter 5 are not in the same physical structure. This is a schematic diagram of the power supply system grounding.

[0072] The power supply of the T / R unit of the phased array device is a single-point grounding system. When the bus converter 3 and the fast-response non-isolated load point converter 4 and non-isolated load point converter 5 are not in the same physical structure, the positive and negative terminals of the relay bus output by the bus converter 3 are grounded through thin film capacitors.

[0073] In a single-point grounding system, to ensure the independent operation of the drain power supply circuit, the negative terminal of the transfer bus must not be grounded. Instead, common-mode capacitors are connected to ground at both the positive and negative terminals of the transfer bus to suppress common-mode noise and improve the electromagnetic compatibility of the system.

[0074] like Figure 4The diagram shows a power supply system grounding schematic when the present invention is applied to a single-point grounding system and the bus converter 3, fast-response non-isolated point-of-load converter 4, and non-isolated point-of-load converter 5 are in the same physical structure.

[0075] The power supply of the phased array equipment T / R unit is a single-point grounding system. When the bus converter 3, the fast-response non-isolated load point converter 4, and the non-isolated load point converter 5 are in the same physical structure, the positive and negative terminals of the high-voltage DC bus input to the bus converter 3 are grounded through film capacitors, and the negative terminal of the transfer bus is grounded through the far end of the T / R unit.

[0076] Bus converter 3, fast-response non-isolated point-of-load converter 4, and non-isolated point-of-load converter 5 are in the same physical structure. The negative terminal of the transfer bus is grounded at the far end through the T / R unit. Common-mode noise is mainly concentrated between the high-voltage DC bus and ground. Common-mode capacitors are connected between the positive and negative terminals of the high-voltage DC bus and ground to suppress common-mode noise and improve the electromagnetic compatibility of the system.

[0077] like Figure 5 The diagram shows a schematic of the parallel redundant output automatic switching circuit of the bus converter 3 of the present invention.

[0078] The positive output terminal of the bus converter 3 is connected in series with, as shown in the example Figure 5 The automatic switching transistor V1 shown automatically turns on when there is voltage at the output of bus converter 3 and automatically turns off when there is no voltage. Resistors R2 and R3 are sequentially arranged between the positive and negative output terminals of bus converter 3, while resistors R5 and R6 are connected in series with transistor V2 between the positive and negative output terminals of bus converter 3. One end of resistor R1 is connected to the gate of transistor V1, and the other end is connected between resistors R5 and R6. One end of resistor R4 is connected between resistors R2 and R3, and the other end is connected to the gate of transistor V2. The source of transistor V2 is grounded.

[0079] When the output voltage of bus converter 3 is normal, the series-connected R2 and R3 complete the voltage division and provide the gate voltage of transistor V2 through R4 to turn on V2. After V2 turns on, R6 is connected to the negative output terminal of bus converter 3. The series-connected R5 and R6 complete the voltage division and provide the gate voltage of transistor V1 through R1 to turn on V1, thus completing the parallel connection.

[0080] When the output voltage of bus converter 3 is abnormal, the series-connected R2 and R3 cannot form a voltage divider circuit and cannot provide the gate voltage for V2 to conduct. V2 is turned off. After V2 is turned off, the series-connected R5 and R6 cannot form a voltage divider circuit and cannot provide the gate conduction voltage for transistor V1. V1 is turned off, and the automatic disconnection of the faulty bus converter 3 is completed.

[0081] like Figure 6The diagram shows a feedback loop of the fast-response non-isolated point-of-load converter 4 of the present invention.

[0082] The feedback loop of the fast-response non-isolated point-of-load converter 4 includes a multi-phase interleaved buck circuit 601, an output rectifier and filter circuit 602, a sampling circuit 604, and a switching control circuit 603.

[0083] like Figure 7 The diagram shows the non-isolated multiphase interleaved synchronous buck regulator circuit of the fast response non-isolated point-of-load converter 4 of the present invention. The fast response non-isolated point-of-load converter 4 is a synchronous buck multiphase interleaved buck regulator circuit.

[0084] Figure 7 (a) is the multiphase interleaved synchronous buck regulator circuit of the fast-response non-isolated point-of-load converter 4; it can be selected when the transient response requirements are extremely high and the system space allows. Figure 7 (a) shows the multiphase interleaved synchronous buck regulator circuit with cross-inductance. By adding a compensation inductor, the current of a certain phase is increased and coupled to the N phase in series through the secondary winding, thereby doubling the current response speed and further improving the response speed of the multiphase interleaved synchronous buck regulator circuit.

[0085] like Figure 8 As shown, the Bode plot of the fast-response non-isolated point-of-load converter 4 of the present invention is presented.

[0086] When the input is 48V and the output is 24V, the fast-response non-isolated point-of-load converter 4 is a non-isolated two-phase interleaved synchronous buck converter with a switching frequency of 300kHz, and its crossover frequency is 60kHz.

[0087] like Figure 9 The figure shows the transient response simulation waveform of the fast-response non-isolated point-of-load converter 4 of this invention. (Same as above) Figure 8 The parameters are such that the transient response time is approximately 15µs.

[0088] like Figure 10 The diagram shows a schematic of the feedback loop of an isolated point-of-load converter.

[0089] When the point-of-load converter is an isolation converter, the feedback loop contains an isolation drive circuit 1001, a switching power conversion circuit 1002, a power transmission transformer 1003, an output rectifier and filter circuit 1004, an isolation sampling circuit 1006, and a switching control circuit 1005.

[0090] like Figure 11 The Bode plot of the isolated point-of-load converter is shown below.

[0091] With the same output voltage of 24V, the crossover frequency of the isolated point-of-load converter is 10kHz.

[0092] like Figure 12 The figure shows the simulation waveform of the transient response of the isolated point-of-load converter.

[0093] same Figure 11 The parameters are such that the transient response time is approximately 400µs.

[0094] like Figures 9-12 The technical solution is as follows: First, due to the inherent pole frequency limitation of the isolation sampling circuit 1006, the system struggles to achieve a higher crossover frequency. Furthermore, the isolation sampling circuit 1006, the isolation drive circuit 1001, and the power transmission transformer 1003 increase the converter's system delay. A large system delay can easily lead to oscillations at high crossover frequencies, limiting the compensation bandwidth and making it difficult for the system to achieve a higher crossover frequency. Therefore, the technical solution of this invention significantly improves the transient response capability of the point-of-load converter.

[0095] like Figure 13 The diagram shown is a power-on startup flowchart of the fast load response phased array equipment power supply system of the relay bus architecture of the present invention.

[0096] The process is as follows:

[0097] (a) When the input three-phase AC power is applied, the power filter and surge protector 1 work normally;

[0098] (b) The three-phase active power factor correction circuit 2 starts and outputs DC power to the high-voltage DC bus;

[0099] (c) The M+N bus converter array 3 is started sequentially in a time-sharing manner to ensure that there is no emergency response to the parallel redundant circuit;

[0100] (d) The non-isolated load point converter 5 starts up to supply power to the array control circuit of the phased array equipment, and at the same time provides auxiliary power to the T / R unit of the phased array equipment;

[0101] (e) Enable / disable the array control confirmation T / R unit of the phased array equipment;

[0102] (f) Fast-response non-isolated point-of-load converter 4 starts up, providing power to the drain of the T / R unit;

[0103] (g) Check whether the output current of each fast response non-isolated point-of-load converter 4 is normal. If there is an abnormality, go back to step (f) and turn off the enable of the fast response non-isolated point-of-load converter 4 with abnormal output. If it is normal, execute (h).

[0104] (h) Enable the T / R unit;

[0105] (i) Power on is complete.

[0106] The fast load response phased array power supply system of the present invention uses a parallel redundant bus converter array to complete electrical isolation and voltage transformation from the high voltage DC bus to the transfer bus. The non-isolated load point converter completes the auxiliary power supply of the T / R unit and the power supply of the array control circuit. The fast response non-isolated proportional converter completes the drain power supply of the T / R unit. This achieves precise voltage regulation and power supply to the load end of the array T / R unit while improving the task reliability of the power supply system and improving the power density and transient response capability of the load point converter.

[0107] The above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application, and should all be included within the protection scope of this application.

Claims

1. A power supply system for a fast load response phased array device with a relay bus architecture, characterized in that, include: Power supply filter and surge protector (1), three-phase active power factor correction circuit (2), bus converter (3) array, fast response non-isolated point-of-load converter (4) and non-isolated point-of-load converter (5); The parallel redundant bus converter (3) array completes electrical isolation and voltage conversion from high voltage DC bus to transfer bus. The non-isolated load point converter (5) completes the auxiliary power supply of the T / R unit of the phased array equipment and the power supply of the array control circuit. The fast response non-isolated load point converter (4) completes the drain power supply of the T / R unit. The power filter and surge protector (1) performs EMI filtering and surge suppression on the input three-phase AC power and then sends it to the three-phase active power factor correction circuit (2). The three-phase active power factor correction circuit (2) converts the three-phase AC power into a stable high-voltage DC bus voltage and then sends it to the bus converter (3) array at the input end. The bus converter (3) array converts the high-voltage DC bus voltage into a transfer bus voltage and then sends it to the non-isolated point-of-load converter (5) and multiple fast-response non-isolated point-of-load converters (4). The transfer bus voltage output by the bus converter (3) is set to an integer multiple of the output voltage of the fast-response non-isolated point-of-load converter (4). The fast-response non-isolated point-of-load converter (4) performs step-down and voltage regulation at a preset duty cycle. Each fast-response non-isolated point-of-load converter (4) provides drain power to multiple T / R units of the phased array device.

2. The fast load response phased array equipment power supply system with a relay bus architecture according to claim 1, characterized in that, The bus converter (3) is a step-down converter with electrical isolation between the input and output terminals. M+N bus converters (3) are set. The normal operation of the system can be guaranteed if N of the N+M bus converters (3) are working normally. When the M+N bus converters (3) array is started, it is started sequentially in time-sharing.

3. The fast load response phased array equipment power supply system with a relay bus architecture according to claim 1, characterized in that, The intermediate bus voltage output by the bus converter (3) is twice the output voltage of the fast response non-isolated point-of-load converter (4), and the duty cycle of the fast response non-isolated point-of-load converter (4) is 50%.

4. The fast load response phased array equipment power supply system with a relay bus architecture according to claim 1, characterized in that, After multiple fast-response non-isolated point-of-load converters (4) synchronize the switching of the internal multiphase interleaved buck circuit through the frequency synchronization signal, the high-frequency ripple output of the fast-response non-isolated point-of-load converter (4) array is also synchronized, and the parasitic radio frequency spurious caused by the high-frequency ripple of the drain power supply of the T / R unit is also synchronized, thus synchronizing the random broadband noise into point frequency spurious.

5. The fast load response phased array equipment power supply system of the relay bus architecture according to claim 1, characterized in that, When the power supply of the phased array equipment T / R unit is a multi-point grounding system, the negative terminal of the transfer bus output by the bus converter (3) is grounded with low resistance.

6. The fast load response phased array equipment power supply system with a relay bus architecture according to claim 1, characterized in that, The power supply for the T / R unit of the phased array device is a single-point grounding system, then: When the bus converter (3) is not in the same physical structure as the fast-response non-isolated point-of-load converter (4) and the non-isolated point-of-load converter (5), the positive and negative terminals of the transfer bus output by the bus converter (3) are grounded through a thin film capacitor; when they are in the same physical structure, the positive and negative terminals of the high-voltage DC bus input by the bus converter (3) are grounded through a thin film capacitor, and the negative terminal of the transfer bus is grounded through the far end of the T / R unit.

7. The fast load response phased array equipment power supply system with a relay bus architecture according to claim 1, characterized in that, The bus converter (3) output positive terminal is connected in series with an automatic switching transistor V1. The bus converter (3) automatically turns on when there is voltage and automatically turns off when there is no voltage. Resistors R2 and R3 are sequentially arranged between the positive and negative terminals of the bus converter (3) output, while resistors R5 and R6 are connected in series with transistor V2 between the positive and negative terminals of the bus converter (3) output. One end of resistor R1 is connected to the gate of transistor V1, and the other end is connected between resistors R5 and R6. One end of resistor R4 is connected between resistors R2 and R3, and the other end is connected to the gate of transistor V2. The source of transistor V2 is grounded.

8. The fast load response phased array equipment power supply system with a relay bus architecture according to claim 7, characterized in that, When the output voltage of the bus converter (3) is normal, the series-connected R2 and R3 complete the voltage division and provide the gate voltage of transistor V2 through R4 to turn on V2. After V2 turns on, R6 is connected to the negative output terminal of the bus converter (3). The series-connected R5 and R6 complete the voltage division and provide the gate voltage of transistor V1 through R1 to turn on V1, thus completing the parallel connection. When the output voltage of the bus converter (3) is abnormal, the series-connected R2 and R3 cannot form a voltage division circuit and cannot provide the gate voltage for V2 to turn on. V2 turns off. After V2 turns off, the series-connected R5 and R6 cannot form a voltage division circuit and cannot provide the gate voltage for transistor V1 to turn on. V1 turns off, thus completing the automatic disconnection of the faulty bus converter (3).

9. The fast load response phased array equipment power supply system with a relay bus architecture according to claim 1, characterized in that, The fast-response non-isolated point-of-load converter (4) is a synchronous step-down multiphase interleaved step-down regulator circuit.

10. The fast load response phased array equipment power supply system with a relay bus architecture according to claim 1, characterized in that, The power-on startup process of the fast load response phased array equipment power supply system of the relay bus architecture is as follows: (a) When the input three-phase AC power is turned on, the power filter and surge protector (1) work normally; (b) The three-phase active power factor correction circuit (2) starts and outputs DC power to the high-voltage DC bus; (c) The M+N bus converter (3) arrays are started sequentially in a time-sharing manner; (d) The non-isolated load point converter (5) starts to supply power to the array control circuit of the phased array equipment and at the same time provides auxiliary power to the T / R unit of the phased array equipment. (e) Enable / disable the array control confirmation T / R unit of the phased array equipment; (f) The fast-response non-isolated point-of-load converter (4) starts up to provide power to the drain of the T / R unit; (g) Check whether the output current of each fast response non-isolated point-of-load converter (4) is normal. If there is an abnormality, go back to step (f) and turn off the enable of the fast response non-isolated point-of-load converter (4) with abnormal output. If it is normal, execute (h). (h) Enable the T / R unit; (i) Power on is complete.

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