Anti-radiation DC-DC converter based on hybrid redundancy topology control and DC-DC conversion method

Abstract

The invention relates to a DC-DC converter and a DC-DC conversion method, in particular to an anti-radiation DC-DC converter based on hybrid redundancy topology control and a DC-DC conversion method, and solves the technical problems that an existing DC-DC converter is difficult to consider a wide input range and high efficiency, or is relatively large in size and relatively high in power consumption, and a working mode is difficult to adjust in real time. The DC-DC converter comprises at least two DC-DC conversion channels with different topological structures, the DC-DC conversion channels connected to a DC-DC converter main circuit are switched through a central controller and a high-speed analog switch unit according to environmental radiation data acquired by a radiation acquisition module, and advantages, balance adaptability and energy efficiency of different topological structures can be considered; and meanwhile, the environmental radiation data is directly associated with DC-DC conversion channel switching, so that the voltage conversion mode can be adjusted in real time, and the response efficiency is improved.

Description

Technical Field

[0001] This invention relates to DC-DC converters and DC-DC conversion methods, specifically to a radiation-resistant DC-DC converter and DC-DC conversion method based on hybrid redundant topology control. Background Technology

[0002] In aerospace and other fields, DC-DC converters, as core power supply components, are exposed to radiation environments for extended periods. This can easily lead to performance degradation due to the accumulation of total ionizing dose (TID) or transient failures caused by single-event effects (SEE), resulting in abnormal output voltage or even system paralysis.

[0003] Single-topology DC-DC converters struggle to balance wide input range and high efficiency. For example, Buck-Boost topologies adapt to a wide voltage range but have lower efficiency; LLC resonant topologies are highly efficient but have a narrow input range. Traditional redundant topologies, such as triple-modulus redundant topologies, are bulky and consume more power, making them unsuitable for miniaturized devices. Furthermore, the separation of radiation monitoring and power control prevents real-time adjustment of the operating mode based on radiation intensity, resulting in delayed fault response. Summary of the Invention

[0004] The purpose of this invention is to solve the technical problems of existing DC-DC converters, which are difficult to balance wide input range and high efficiency, or have large size, high power consumption, and difficulty in adjusting the working mode in real time. The invention provides a radiation-resistant DC-DC converter and DC-DC conversion method based on hybrid redundant topology control.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows: A radiation-resistant DC-DC converter based on hybrid redundant topology control is characterized by comprising N DC-DC conversion channels with different topologies, a high-speed analog switching unit, a radiation acquisition module, a DC-DC converter main circuit, an output voltage regulator module, and a central controller, wherein N is an integer and N≥2; The input terminals of the N DC-DC conversion channels are used to connect to the DC input voltage, and the output terminals are respectively connected to one input terminal of the high-speed analog switching unit. The DC-DC conversion channels are used to determine the voltage conversion mode according to the corresponding topology. The output terminal of the high-speed analog switch unit is connected to the first input terminal of the DC-DC converter main circuit. The high-speed analog switch unit is used to connect one of the DC-DC conversion channels to the DC-DC converter main circuit. The output terminal of the DC-DC converter main circuit is connected to the input terminal of the output voltage regulator module. The DC-DC converter main circuit is used to convert the DC input voltage, and the output terminal of the output voltage regulator module is used to output the converted DC voltage to the load. The output of the radiation acquisition module is connected to the first input of the central controller, and is used to acquire environmental radiation data and send it to the central controller. The first output terminal of the central controller is connected to the control terminal of the high-speed analog switch unit, which is used to process environmental radiation data and send control signals to the high-speed analog switch unit accordingly.

[0006] Furthermore, the central controller is equipped with an adaptive neuromorphic control algorithm. The adaptive neuromorphic control algorithm is used to dynamically learn environmental radiation data and output control signals to the high-speed analog switching unit according to preset topology switching conditions.

[0007] Furthermore, it also includes a voltage monitoring module and an emergency power supply module; The input terminal of the voltage monitoring module is connected to the output terminal of the high-speed analog switch unit, and the output terminal is connected to the second input terminal of the central controller. The voltage monitoring module is used to monitor the output voltage of the high-speed analog switch unit. The control terminal of the emergency power supply module is connected to the second output terminal of the central controller, and the output terminal is connected to the second input terminal of the DC-DC converter main circuit. The emergency power supply module is used to provide emergency power to the DC-DC converter main circuit. The central controller is used to determine the working status of the DC-DC conversion channel based on the output voltage of the high-speed analog switch unit, so as to connect the emergency power supply module to the DC-DC converter main circuit when the DC-DC conversion channel fails.

[0008] Furthermore, N=2, and the two DC-DC conversion channels respectively have Buck-Boost topology and LLC resonant topology.

[0009] Furthermore, the emergency power supply module is an energy Harvesting; The central controller uses a radiation-resistant MCU; The radiation acquisition module employs a radiation-resistant silicon detector to monitor the TID dose rate and detect SEE events by means of output voltage fluctuations.

[0010] Furthermore, the radiation-resistant MCU is a ruggedized chip based on ARM Cortex-M4.

[0011] Furthermore, the high-speed analog switch unit includes N high-speed electromagnetic relays; The input terminals of the N high-speed electromagnetic relays are respectively connected to the output terminals of the N DC-DC conversion channels, and the output terminals are respectively connected to the first input terminal of the DC-DC converter main circuit, which are used to control the on / off connection between the N DC-DC conversion channels and the DC-DC converter main circuit.

[0012] This invention also provides a DC-DC conversion method, employing the aforementioned radiation-resistant DC-DC converter based on hybrid redundancy topology control, characterized by the following steps: Step 1: Set the topology switching conditions for each of the N DC-DC conversion channels, then connect the input terminals of the N DC-DC conversion channels to the DC input voltage, and connect the output terminal of the output voltage regulator module to the load. Step 2: The central controller controls the high-speed analog switching unit to connect one of the DC-DC conversion channels to the main circuit of the DC-DC converter; Step 3: The radiation acquisition module collects environmental radiation data and sends it to the central controller; Step 4: The central controller processes the environmental radiation data, and then determines the DC-DC conversion channel to be connected to the main circuit of the DC-DC converter according to the topology switching conditions of the N DC-DC conversion channels, obtains the control signal, and sends it to the high-speed analog switching unit. Step 5: The high-speed analog switch unit connects the DC-DC conversion channel to the main circuit of the DC-DC converter according to the control signal. The main circuit of the DC-DC converter converts the DC input voltage according to the voltage conversion mode determined by the topology of the DC-DC conversion channel to obtain the converted DC voltage and transmits it to the output voltage regulator module. Step 6: The output voltage regulator module regulates the converted DC voltage and transmits it to the load, then returns to step 3 until the DC-DC conversion is completed.

[0013] Furthermore, in step 1, N=2, and the topologies of the two DC-DC conversion channels are Buck-Boost topology and LLC resonant topology, respectively. The topology switching conditions for the two DC-DC conversion channels are as follows: If the cumulative TID dose exceeds 80 krad, or if the SEE event causes the output voltage fluctuation to be greater than 5%, then the DC-DC conversion channel with LLC resonant topology is connected to the main circuit of the DC-DC converter; otherwise, the DC-DC conversion channel with Buck-Boost topology is connected to the main circuit of the DC-DC converter. In step 2, the DC-DC conversion channel with Buck-Boost topology is connected to the main circuit of the DC-DC converter.

[0014] Furthermore, in step 5, before connecting the DC-DC conversion channel to the main circuit of the DC-DC converter, the output of the DC-DC conversion channel is adjusted so that the voltage difference between it and the DC-DC conversion channel currently connected to the main circuit of the DC-DC converter is ≤2%.

[0015] Compared with the prior art, the present invention has the following beneficial effects: The radiation-resistant DC-DC converter based on hybrid redundant topology control provided by this invention includes at least two DC-DC conversion channels with different topologies. Based on the environmental radiation data collected by the radiation acquisition module, the DC-DC conversion channels connected to the main circuit of the DC-DC converter are switched through a central controller and a high-speed analog switching unit. This can take into account the advantages of different topologies and balance adaptability and energy efficiency. At the same time, by directly linking the environmental radiation data with the switching of the DC-DC conversion channels, the voltage conversion mode can be adjusted in real time to improve response efficiency. Attached Figure Description

[0016] Figure 1 This is a structural schematic diagram of an embodiment of the present invention. Detailed Implementation

[0017] The radiation-resistant DC-DC converter and DC-DC conversion method based on hybrid redundancy topology control proposed in this invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. Those skilled in the art should understand that these embodiments are merely used to explain the technical principles of this invention and are not intended to limit the scope of protection of this invention.

[0018] A radiation-hardened DC-DC converter based on hybrid redundancy topology control, such as Figure 1 As shown, it includes two DC-DC conversion channels, a high-speed analog switching unit, a radiation acquisition module, a DC-DC converter main circuit, an output voltage regulator module, a voltage monitoring module, an emergency power supply module, and a central controller.

[0019] The two DC-DC conversion channels feature Buck-Boost and LLC resonant topologies, respectively. Their input terminals are connected to a DC input voltage, and their output terminals are connected to one input terminal of a high-speed analog switching unit. The DC-DC conversion channels determine the voltage conversion mode based on their respective topologies. In this embodiment, the DC-DC conversion channel with the Buck-Boost topology adjusts its duty cycle via a PWM controller, supporting a wide input voltage range of 8-36V and outputting a stable DC voltage of 5-12V, adaptable to complex power supply environments. The DC-DC conversion channel with the LLC resonant topology achieves high-efficiency conversion through frequency adjustment, with an input range of 18-36V, and its output is consistent with that of the DC-DC conversion channel with the Buck-Boost topology.

[0020] The output of the high-speed analog switching unit is connected to the first input of the DC-DC converter main circuit and the input of the voltage monitoring module, respectively. The high-speed analog switching unit is used to connect one of the DC-DC conversion channels to the DC-DC converter main circuit. The output of the DC-DC converter main circuit is connected to the input of the output voltage regulator module, which is used to convert the DC input voltage. The output of the output voltage regulator module is used to output the converted DC voltage to the load. The output voltage regulator module can suppress voltage ripple during the DC-DC conversion channel switching process and has built-in overcurrent and overvoltage protection circuits. When any DC-DC conversion channel fails, it can quickly cut off the input to avoid affecting the load.

[0021] The output of the radiation acquisition module is connected to the first input of the central controller to collect environmental radiation data and send it to the central controller. The radiation acquisition module uses a radiation-hardened silicon detector to monitor the TID dose rate and detect SEE events by detecting output voltage fluctuations.

[0022] The output of the voltage monitoring module is connected to the second input of the central controller to monitor the output voltage of the high-speed analog switching unit. The output of the emergency power supply module is connected to the second input of the DC-DC converter main circuit to provide emergency power to the DC-DC converter main circuit. The emergency power supply module uses Harvesting.

[0023] The central controller's first output is connected to the control terminal of the high-speed analog switch unit, and its second output is connected to the control terminal of the emergency power supply module. The central controller processes environmental radiation data and sends control signals to the high-speed analog switch unit accordingly. Simultaneously, it determines the operating status of the DC-DC conversion channel based on the output voltage of the high-speed analog switch unit, thus connecting the emergency power supply module to the DC-DC converter's main circuit in case of a DC-DC conversion channel failure. When the DC-DC conversion channel fails, its output voltage drops below a threshold, and the central controller automatically connects the emergency power supply module to the DC-DC converter's main circuit, providing emergency power and ensuring uninterrupted core functions.

[0024] The central controller employs a radiation-hardened MCU, specifically a ruggedized chip based on the ARM Cortex-M4, and incorporates an adaptive neuromorphic control algorithm. This algorithm dynamically learns radiation data and outputs control signals to the high-speed analog switching unit based on topology switching conditions.

[0025] In this embodiment, the high-speed analog switch unit includes two high-speed electromagnetic relays. The input terminals of the two high-speed electromagnetic relays are respectively connected to the output terminals of the two DC-DC conversion channels, and the output terminals are respectively connected to the first input terminal of the DC-DC converter main circuit. They are used to control the on / off connection between the two DC-DC conversion channels and the DC-DC converter main circuit.

[0026] When the radiation-resistant DC-DC converter based on hybrid redundant topology control provided in this embodiment is working, the DC-DC conversion channel with Buck-Boost topology is first connected to the main circuit of the DC-DC converter. When the cumulative dose of TID exceeds 80 krad, or the output voltage fluctuation caused by the SEE event is greater than 5%, the topology switching is triggered, and the DC-DC conversion channel is switched to the DC-DC conversion channel with LLC resonant topology.

[0027] Before switching DC-DC conversion channels, adjust the output voltage of the DC-DC conversion channel with LLC resonant topology to ensure that the voltage difference between it and the DC-DC conversion channel with Buck-Boost topology is ≤2%, thus avoiding switching shock.

[0028] The radiation-hardened DC-DC converter based on hybrid redundant topology control provided in this embodiment consists of three core stages: sensing, decision-making, and execution. First, the central controller acquires and processes environmental radiation data in real time through the radiation acquisition module. Then, it uses an internally deployed adaptive neuromorphic control algorithm to extract features and, based on topology switching conditions, determines whether to switch the DC-DC conversion channel connected to the main circuit of the DC-DC converter, and outputs a control signal to the high-speed analog switching unit. Finally, the high-speed analog switching unit connects the corresponding DC-DC conversion channel to the main circuit of the DC-DC converter according to the control signal.

[0029] This embodiment also provides a DC-DC conversion method, employing the aforementioned radiation-resistant DC-DC converter based on hybrid redundancy topology control, comprising the following steps: Step 1: Set the topology switching conditions for the two DC-DC conversion channels respectively. Then, connect the input terminals of the two DC-DC conversion channels to the DC input voltage, and connect the output terminal of the output voltage regulator module to the load. The topology switching conditions for the two DC-DC conversion channels are as follows: if the cumulative TID dose exceeds 80 krad, or if a SEE event causes output voltage fluctuations >5%, then connect the DC-DC conversion channel with the LLC resonant topology to the main circuit of the DC-DC converter; otherwise, connect the DC-DC conversion channel with the Buck-Boost topology to the main circuit of the DC-DC converter.

[0030] Step 2: The central controller controls the high-speed analog switching unit to connect the DC-DC conversion channel with Buck-Boost topology to the main circuit of the DC-DC converter.

[0031] Step 3: The radiation acquisition module collects environmental radiation data and sends it to the central controller.

[0032] Step 4: The central controller processes the environmental radiation data, and then determines the DC-DC conversion channel to be connected to the main circuit of the DC-DC converter based on the topology switching conditions of the two DC-DC conversion channels, obtains the control signal, and sends it to the high-speed analog switching unit.

[0033] Step 5: The high-speed analog switch unit connects the DC-DC conversion channel to the main circuit of the DC-DC converter according to the control signal. The main circuit of the DC-DC converter converts the DC input voltage according to the voltage conversion mode determined by the topology of the DC-DC conversion channel, obtains the converted DC voltage, and transmits it to the output voltage regulator module.

[0034] In step 5, before connecting the DC-DC conversion channel to the main circuit of the DC-DC converter, adjust the output of the DC-DC conversion channel to ensure that the voltage difference between it and the current DC-DC conversion channel is ≤2% to avoid switching shock.

[0035] Step 6: The output voltage regulator module regulates the converted DC voltage and transmits it to the load, then returns to step 3 until the DC-DC conversion is completed.

[0036] This embodiment provides a radiation-hardened DC-DC converter and DC-DC conversion method based on hybrid redundancy topology control. It employs a "hardware switch + software control" approach to achieve switching between DC-DC conversion channels. Each of the two DC-DC conversion channels is connected in series with a high-speed electromagnetic relay. Output synchronization, timing coordination, and closed-loop regulation are dynamically matched through an adaptive neuromorphic control algorithm deployed within the central controller. Ultimately, this achieves seamless redundancy switching in a radiation environment, ensuring the continuous and stable operation of the DC-DC converter. This embodiment leverages the performance advantages of different topologies while enhancing radiation-hardness reliability through redundancy mechanisms.

Claims

1. A radiation-hardened DC-DC converter based on hybrid redundancy topology control, characterized in that: It includes N DC-DC conversion channels with different topologies, a high-speed analog switching unit, a radiation acquisition module, a DC-DC converter main circuit, an output voltage regulator module, and a central controller, where N is an integer and N≥2; The input terminals of the N DC-DC conversion channels are used to connect to the DC input voltage, and the output terminals are respectively connected to one input terminal of the high-speed analog switching unit. The DC-DC conversion channels are used to determine the voltage conversion mode according to the corresponding topology. The output terminal of the high-speed analog switch unit is connected to the first input terminal of the DC-DC converter main circuit. The high-speed analog switch unit is used to connect one of the DC-DC conversion channels to the DC-DC converter main circuit. The output terminal of the DC-DC converter main circuit is connected to the input terminal of the output voltage regulator module. The DC-DC converter main circuit is used to convert the DC input voltage, and the output terminal of the output voltage regulator module is used to output the converted DC voltage to the load. The output of the radiation acquisition module is connected to the first input of the central controller, and is used to acquire environmental radiation data and send it to the central controller. The first output terminal of the central controller is connected to the control terminal of the high-speed analog switch unit, which is used to process environmental radiation data and send control signals to the high-speed analog switch unit accordingly.

2. The radiation-resistant DC-DC converter based on hybrid redundancy topology control according to claim 1, characterized in that: The central controller is equipped with an adaptive neuromorphic control algorithm. The adaptive neuromorphic control algorithm is used to dynamically learn environmental radiation data and output control signals to the high-speed analog switching unit according to preset topology switching conditions.

3. The radiation-resistant DC-DC converter based on hybrid redundancy topology control according to claim 2, characterized in that: It also includes a voltage monitoring module and an emergency power supply module; The input terminal of the voltage monitoring module is connected to the output terminal of the high-speed analog switch unit, and the output terminal is connected to the second input terminal of the central controller. The voltage monitoring module is used to monitor the output voltage of the high-speed analog switch unit. The control terminal of the emergency power supply module is connected to the second output terminal of the central controller, and the output terminal is connected to the second input terminal of the DC-DC converter main circuit. The emergency power supply module is used to provide emergency power to the DC-DC converter main circuit. The central controller is used to determine the working status of the DC-DC conversion channel based on the output voltage of the high-speed analog switch unit, so as to connect the emergency power supply module to the DC-DC converter main circuit when the DC-DC conversion channel fails.

4. The radiation-resistant DC-DC converter based on hybrid redundancy topology control according to claim 3, characterized in that: N=2, and the two DC-DC conversion channels have Buck-Boost topology and LLC resonant topology, respectively.

5. The radiation-resistant DC-DC converter based on hybrid redundancy topology control according to claim 4, characterized in that: The emergency power supply module is an energy Harvesting; The central controller uses a radiation-resistant MCU; The radiation acquisition module employs a radiation-resistant silicon detector to monitor the TID dose rate and detect SEE events by means of output voltage fluctuations.

6. The radiation-hardened DC-DC converter based on hybrid redundancy topology control according to claim 5, characterized in that: The radiation-resistant MCU is a ruggedized chip based on ARM Cortex-M4.

7. The radiation-hardened DC-DC converter based on hybrid redundancy topology control according to any one of claims 1-6, characterized in that: The high-speed analog switch unit includes N high-speed electromagnetic relays; The input terminals of the N high-speed electromagnetic relays are respectively connected to the output terminals of the N DC-DC conversion channels, and the output terminals are respectively connected to the first input terminal of the DC-DC converter main circuit, which are used to control the on / off connection between the N DC-DC conversion channels and the DC-DC converter main circuit.

8. A DC-DC conversion method, employing the radiation-resistant DC-DC converter based on hybrid redundancy topology control as described in any one of claims 1-7, characterized in that, Includes the following steps: Step 1: Set the topology switching conditions for each of the N DC-DC conversion channels, then connect the input terminals of the N DC-DC conversion channels to the DC input voltage, and connect the output terminal of the output voltage regulator module to the load. Step 2: The central controller controls the high-speed analog switching unit to connect one of the DC-DC conversion channels to the main circuit of the DC-DC converter; Step 3: The radiation acquisition module collects environmental radiation data and sends it to the central controller; Step 4: The central controller processes the environmental radiation data, and then determines the DC-DC conversion channel to be connected to the main circuit of the DC-DC converter according to the topology switching conditions of the N DC-DC conversion channels, obtains the control signal, and sends it to the high-speed analog switching unit. Step 5: The high-speed analog switch unit connects the DC-DC conversion channel to the main circuit of the DC-DC converter according to the control signal. The main circuit of the DC-DC converter converts the DC input voltage according to the voltage conversion mode determined by the topology of the DC-DC conversion channel to obtain the converted DC voltage and transmits it to the output voltage regulator module. Step 6: The output voltage regulator module regulates the converted DC voltage and transmits it to the load, then returns to step 3 until the DC-DC conversion is completed.

9. The DC-DC conversion method according to claim 8, characterized in that: In step 1, N=2, and the topologies of the two DC-DC conversion channels are Buck-Boost topology and LLC resonant topology, respectively. The topology switching conditions for the two DC-DC conversion channels are as follows: If the cumulative TID dose exceeds 80 krad, or if the SEE event causes the output voltage fluctuation to be greater than 5%, then the DC-DC conversion channel with LLC resonant topology is connected to the main circuit of the DC-DC converter; otherwise, the DC-DC conversion channel with Buck-Boost topology is connected to the main circuit of the DC-DC converter. In step 2, the DC-DC conversion channel with Buck-Boost topology is connected to the main circuit of the DC-DC converter.

10. The DC-DC conversion method according to claim 9, characterized in that: In step 5, before connecting the DC-DC conversion channel to the main circuit of the DC-DC converter, adjust the output of the DC-DC conversion channel so that the voltage difference between it and the DC-DC conversion channel currently connected to the main circuit of the DC-DC converter is ≤2%.

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