Soft start control system of radar auxiliary power supply

Abstract

The invention discloses a soft start control system of a radar auxiliary power supply, which is characterized in that an AC-DC auxiliary power supply is connected with an input voltage, the output end of the AC-DC auxiliary power supply is simultaneously connected with a first monostable trigger and a second monostable trigger, the output end of the first monostable trigger is connected with a surge suppression circuit, and the output end of the second monostable trigger is connected with a surge suppression circuit; the output end of the second monostable trigger is connected with the power module enabling circuit, and the AC-DC auxiliary power supply supplies electric energy to the surge suppression circuit, the first monostable trigger and the second monostable trigger. And the first monostable trigger and the second monostable trigger are respectively used for controlling the working states and the working duration of the surge suppression circuit and the power module enable circuit. According to the scheme, soft start of the radar auxiliary power supply is realized through multiple time sequence control, surge current is suppressed, the power supply module has steady-state input voltage, and the reliability and the stability of soft start operation of the switching power supply are improved.

Description

Technical Field

[0001] The invention belongs to the field of ship power supplies, and in particular relates to a soft start control system of a radar auxiliary power supply. Background Art

[0002] Radar auxiliary power supply usually consists of soft start circuit, control circuit, power module, and internal power supply. On the one hand, radar auxiliary power supply often generates surge current during soft start process. The surge current value is an important parameter in the soft start process of radar auxiliary power supply and an important indicator for evaluating the performance of radar auxiliary power supply. On the other hand, the power module in radar auxiliary power supply has a wide range of voltage input and enable control. When the power module is running with load, after the input voltage reaches the wide range, if the enable control works too fast, the power module will not be able to immediately establish the voltage required by the load.

[0003] During the soft start of the radar auxiliary power supply, the input AC power will first pass through the filter to remove the high-frequency components, then pass through the rectifier circuit to become DC power, and finally the DC power waveform will be smoothed by the capacitor. The input surge current is generated during the smooth wave formation process. When the surge current is too large, it will cause great harm to power electronic equipment and may even have an impact on the power grid, seriously affecting the safety and stability of the radar auxiliary power supply. The enabling work of the power module in the radar auxiliary power supply needs to be delayed, otherwise the power module will not work.

[0004] In recent years, scholars at home and abroad have proposed different design solutions for the power supply stability problem caused by input surge current to ensure the stable operation of the power supply. For example, a control method of directly connecting a resistor in series in a soft start circuit in a switching power supply. Although this method has a simple circuit and low cost, it has a greater impact on efficiency and is only suitable for use in power supplies with low power. For example, a control method of connecting a negative temperature coefficient thermistor in series in a switching power supply soft start circuit can reduce power loss, but it is easily affected by temperature and affects the effect of limiting input surge current. For example, a control method of using a MOSFET switch tube and a delay network circuit in a switching power supply can achieve different surge current suppression effects by adjusting the component parameters in the delay network, but in actual operation, it is easy to have a failure phenomenon in which the switch tube cannot be turned on, causing the current limiting resistor to continue to heat up until the printed circuit board is burned. Summary of the invention

[0005] In view of the above problems, an object of the present invention is to provide a soft start control system for a radar auxiliary power supply.

[0006] The specific technical solution for achieving the purpose of the present invention is:

[0007] A soft start control system for a radar auxiliary power supply, comprising a surge suppression circuit, an AC-DC auxiliary power supply, a first monostable trigger, a second monostable trigger and a power module enabling circuit;

[0008] The AC-DC auxiliary power supply is connected to the input voltage, and the output end is connected to the first monostable trigger and the second monostable trigger at the same time, wherein the output end of the first monostable trigger is connected to the surge suppression circuit, and the output end of the second monostable trigger is connected to the power module enabling circuit;

[0009] The surge suppression circuit is arranged between the filter and the rectifier bridge in the radar switching power supply circuit;

[0010] The power module enabling circuit is connected to the power module in the radar switch power circuit;

[0011] The AC-DC auxiliary power supply is used to provide power to the surge suppression circuit, the first monostable trigger, and the second monostable trigger. The first monostable trigger and the second monostable trigger are used to control the working state and working duration of the surge suppression circuit and the power module enabling circuit, respectively.

[0012] Further, the first monostable trigger and the second monostable trigger each include a NE555P timer, a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, a first capacitor, a second capacitor, a third capacitor, a fourth capacitor, a fifth capacitor, and a first light-emitting diode;

[0013] One end of the first resistor is connected to the 15V voltage output by the AC-DC auxiliary power supply, and the other end is respectively connected to one end of the second resistor, one end of the third resistor, and one end of the first capacitor; the other end of the second resistor and the other end of the first capacitor are grounded; the other end of the third resistor is connected to one end of the second capacitor and the TRIG pin of the NE555P timer, and the other end of the second capacitor is grounded;

[0014] The RE pin of the NE555P timer is connected to the 15V voltage output by the AC-DC auxiliary power supply, the Cont pin is connected in series with the third capacitor and then grounded, the GND pin is grounded, the VCC pin is connected to the 15V voltage output by the AC-DC auxiliary power supply, the DIS pin is connected in series with the fourth resistor and then connected to the 15V voltage, one end of the fifth capacitor, and one end of the fifth resistor respectively, the other end of the fifth capacitor is grounded, the other end of the fifth resistor is connected to the anode of the light-emitting diode, and the cathode of the light-emitting diode is connected to the OUT pin of the NE555P timer;

[0015] The DIS pin of the NE555P timer is also connected to the THR pin and then connected in series with a fourth capacitor and then grounded.

[0016] Further, the surge suppression circuit includes a second diode, a first relay, and a thermistor;

[0017] The cathode of the second diode is connected to the 15V voltage output by the AC-DC auxiliary power supply, and the anode is connected to the output signal of the first monostable trigger; the induction mechanism of the first relay is arranged between the anode and cathode of the second diode;

[0018] One end of the thermistor is connected to the input voltage of the radar switch power supply after filtering, and the other end is connected to each rectifier bridge in the radar switch power supply circuit; the contact actuator of the relay is also arranged at both ends of the thermistor.

[0019] Further, the power module enabling circuit includes a third diode, a fourth diode, and a second relay;

[0020] The cathode of the third diode is connected to the 15V voltage output by the AC-DC auxiliary power supply, and the anode is connected to the output signal of the second monostable trigger;

[0021] An induction mechanism of a second relay is also provided between the anode and cathode of the third diode;

[0022] The power module enabling circuit control terminal PC+ is connected to the power module enabling control terminal, and the power module enabling circuit control terminal PC- is connected to the power module input negative terminal;

[0023] A fourth diode and a contact actuator of the second relay are connected in series between the power module enabling circuit control terminal PC+ and the power module enabling circuit control terminal PC-.

[0024] Furthermore, when the control system is working, the AC-DC auxiliary power supply is first connected to the alternating current, and the surge suppression circuit and the power module enabling circuit are respectively controlled by the first monostable trigger and the second monostable trigger, and the surge suppression circuit is used to suppress the input surge current of the radar auxiliary power supply and delay the enabling operation of the power module.

[0025] Furthermore, the process of using the surge suppression circuit to suppress the input surge current of the radar auxiliary power supply and delaying the enabling operation of the power supply module is as follows:

[0026] The AC-DC auxiliary power supply is connected to the alternating current, and the initial voltages of the fourth capacitors in the first monostable trigger and the second monostable trigger are both zero, so the first monostable trigger outputs a high level and enters a temporary stable state, and the surge suppression circuit receives the high level and continues to work. At the same time, the second monostable trigger also outputs a high level and enters a temporary stable state, and the power module enabling circuit does not work, so that the power module does not work;

[0027] After t1 time, the charging voltage of the fourth capacitor of the first monostable trigger reaches a certain value, at which time the first monostable trigger starts to output a low level, the first monostable trigger enters a steady state, the first relay K1 contact actuator of the surge suppression circuit is turned on, and the surge suppression circuit stops working;

[0028] After time t2, the charging voltage of the fourth capacitor of the second monostable trigger reaches a certain value. At this time, the second monostable trigger starts to output a low level, the second monostable trigger enters a steady state, the contact actuator of the second relay of the power module enabling circuit is disconnected, the power module enabling circuit works, and the power module works.

[0029] Furthermore, t2>t1, and the time interval between t2 and t1 should be greater than 500ms.

[0030] Furthermore, the duration of the temporary stable state of the first monostable trigger and the second monostable trigger is determined by the charging state of the fourth capacitor.

[0031] Compared with the prior art, the present invention has the following beneficial effects:

[0032] (1) The solution of the present invention realizes the control of the surge suppression circuit and the power module enabling circuit based on the monostable trigger, which can better suppress the input surge current, so that the power module has a steady-state input voltage, and the power module has a better startup effect;

[0033] (2) The scheme of the present invention designs a multiple timing control method, and realizes multiple timing control of soft start through timing control; by adjusting the time interval of the timing control, the reliability and stability of the soft start operation of the switching power supply can be improved.

[0034] The present invention is further described below in conjunction with specific implementation modes. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 The present invention is a schematic structural diagram of a soft start control system for a radar auxiliary power supply.

[0036] Figure 2 It is a circuit principle diagram of the monostable trigger of the present invention.

[0037] Figure 3 The schematic diagram of the surge suppression circuit of the present invention is shown in FIG.

[0038] Figure 4 The schematic diagram of the power module enabling circuit of the present invention is shown in FIG.

[0039] Figure 5 It is a schematic diagram of the multiple timing control timing of the present invention. DETAILED DESCRIPTION

[0040] Example

[0041] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention. The described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0042] As shown in this application and claims, unless the context clearly indicates an exception, the words "a", "an", "an kind" and / or "the" do not refer to the singular and may also include the plural. Generally speaking, the terms "include" and "comprise" only indicate the inclusion of the steps and elements that have been clearly identified, and these steps and elements do not constitute an exclusive list. The method or device may also include other steps or elements.

[0043] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values ​​of the parts and steps set forth in these embodiments do not limit the scope of the present application. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, method and equipment known to those of ordinary skill in the relevant field may not be discussed in detail, but in appropriate cases, the technology, method and equipment should be considered as a part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, so that once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0044] Combination Figure 1 , a soft start control system of a radar auxiliary power supply, comprising a surge suppression circuit, an AC-DC auxiliary power supply, a first monostable trigger, a second monostable trigger and a power module enabling circuit;

[0045] The AC-DC auxiliary power supply is connected to the input voltage, and the output end is connected to the first monostable trigger and the second monostable trigger at the same time, wherein the output end of the first monostable trigger is connected to the surge suppression circuit, and the output end of the second monostable trigger is connected to the power module enabling circuit;

[0046] The surge suppression circuit is arranged between the filter and the rectifier bridge in the radar switching power supply circuit;

[0047] The power module enabling circuit is connected to the power module in the radar switch power circuit;

[0048] The AC-DC auxiliary power supply is used to provide power to the surge suppression circuit, the first monostable trigger, and the second monostable trigger. The first monostable trigger and the second monostable trigger are used to control the working state and working duration of the surge suppression circuit and the power module enabling circuit, respectively.

[0049] Combination Figure 2 , the first monostable trigger and the second monostable trigger both include a NE555P timer D1, a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, a fifth resistor R5, a first capacitor C1, a second capacitor C2, a third capacitor C3, a fourth capacitor C4, a fifth capacitor C5, and a first light-emitting diode V1;

[0050] One end of the first resistor R1 is connected to the 15V voltage output by the AC-DC auxiliary power supply, and the other end is respectively connected to one end of the second resistor R2, one end of the third resistor R3, and one end of the first capacitor C1; the other end of the second resistor R2 and the other end of the first capacitor C1 are grounded; the other end of the third resistor R3 is connected to one end of the second capacitor C2 and the TRIG pin of the NE555P timer D1, and the other end of the second capacitor C2 is grounded;

[0051] The RE pin of the NE555P timer D1 is connected to the 15V voltage output by the AC-DC auxiliary power supply, the Cont pin is connected in series with the third capacitor C3 and then grounded, the GND pin is grounded, the VCC pin is connected to the 15V voltage output by the AC-DC auxiliary power supply, the DIS pin is connected in series with the fourth resistor R4 and then connected to the 15V voltage, one end of the fifth capacitor C5, and one end of the fifth resistor R5 respectively, the other end of the fifth capacitor C5 is grounded, the other end of the fifth resistor R5 is connected to the anode of the light-emitting diode V1, and the cathode of the light-emitting diode V1 is connected to the OUT pin of the NE555P timer D1;

[0052] The DIS pin of the NE555P timer D1 is also connected to the THR pin and then connected in series with a fourth capacitor C4 and then grounded.

[0053] In the first monostable trigger and the second monostable trigger, the time of the monostable trigger output signal can be changed by controlling the values ​​of the resistor R4 and the charging capacitor C4, thereby adjusting the working time of the corresponding circuit.

[0054] Combination Figure 3 , the surge suppression circuit includes a second diode V2, a first relay K1, and a thermistor R6;

[0055] The cathode of the second diode V2 is connected to the 15V voltage output by the AC-DC auxiliary power supply, and the anode is connected to the output signal of the first monostable trigger; an induction mechanism of the first relay K1 is arranged between the anode and cathode of the second diode V2;

[0056] One end of the thermistor R6 is connected to the input voltage of the radar switching power supply after filtering, and the other end is connected to each rectifier bridge in the radar switching power supply circuit; the contact actuator of the relay K1 is also arranged at both ends of the thermistor R6.

[0057] The surge suppression circuit can significantly slow down the startup surge current generated by the radar auxiliary power supply after it is powered on through the thermistor R6;

[0058] After the AC-DC auxiliary power supply ends, the output signal of the first monostable trigger flips from a high level to a low level within a duration t1, the contact of the first relay K1 is turned on, the thermistor R6 is short-circuited, and the surge suppression circuit ends its operation;

[0059] Combination Figure 4 , the power module enabling circuit includes a third diode V3, a fourth diode V4, and a second relay K2;

[0060] The cathode of the third diode V3 is connected to the 15V voltage output by the AC-DC auxiliary power supply, and the anode is connected to the output signal of the second monostable trigger;

[0061] An induction mechanism of a second relay K2 is also provided between the anode and cathode of the third diode V3;

[0062] The power module enabling circuit control terminal PC+ is connected to the power module enabling control terminal, and the power module enabling circuit control terminal PC- is connected to the power module input negative terminal;

[0063] A fourth diode V4 and a contact actuator of the second relay K2 are connected in series between the power module enabling circuit control terminal PC+ and the power module enabling circuit control terminal PC-.

[0064] The power module enabling circuit controls the prohibition and enabling functions of the power module. The input voltage of the power module begins to exist and rises continuously through the filter capacitor after the radar auxiliary power supply is powered on. After the power module enabling circuit continues to work for time t2, the input voltage of the power module can reach the working voltage of the power module. At this time, the power module control terminal changes from prohibition to enable, and the power module starts to work and has a stable output voltage.

[0065] After the AC-DC auxiliary power supply is completed, the output signal of the second monostable trigger is flipped from high level to low level during the duration t2, the contact of the second relay K2 is disconnected, and the control terminal PC+ of the power module enabling circuit is changed from low level to high level through the fourth diode V4, the power module enabling circuit is finished working, and the power module starts working and has a stable output voltage;

[0066] When the control system is working, the AC-DC auxiliary power supply is first connected to the alternating current, and the surge suppression circuit and the power module enabling circuit are respectively controlled by the first monostable trigger and the second monostable trigger, and the input surge current of the radar auxiliary power supply is suppressed by the surge suppression circuit, and the enabling operation of the power module is delayed.

[0067] Firstly, the first monostable trigger performs soft-start control on the surge suppression circuit. The surge suppression circuit is in working state by default. Only when the output signal of the first monostable trigger is at a low level, the operation is in a steady state. The operation of the surge suppression circuit can be terminated, thereby achieving better input surge current suppression. Secondly, the second monostable trigger performs enable control on the power module. The power module is in the shutdown state by default. Only when the output signal of the second monostable trigger 2 is at a low level, the operation is in a steady state. The power module has a steady-state input voltage control when it is turned on, thereby achieving a better startup function of the power module. Finally, multiple timing controls of soft start are realized by means of timing control methods and adjusting the time interval of timing control.

[0068] Specifically, combined Figure 5 The process of using the surge suppression circuit to suppress the input surge current of the radar auxiliary power supply and delaying the enabling operation of the power supply module is as follows:

[0069] The AC-DC auxiliary power supply is connected to the alternating current, and the initial voltages of the fourth capacitors C4 in the first monostable trigger and the second monostable trigger are both zero. When the charging voltage of the fourth capacitor C4 is less than 1 / 3 of the voltage of the AC-DC auxiliary power supply, the NE555P timer D1 outputs a high level, so the first monostable trigger outputs a high level and enters a temporary stable state, where the duration of the temporary stable state is determined by the charging process of the fourth capacitor C4. The surge suppression circuit receives a high level, and at this time, both ends of the first relay K1 are high levels and its contacts will not be turned on, and the surge suppression circuit continues to work. At the same time, the initial voltage of the fourth capacitor C4 of the second monostable trigger is also zero, and the NE555P timer D1 also outputs a high level, and at this time, both ends of the second relay K2 are also high levels and its contacts will not be disconnected, the power module enabling circuit continues to work, and the power module does not work;

[0070] After t1 time, the charging voltage of the fourth capacitor C4 of the first monostable trigger reaches a certain value, that is, 2 / 3 of the voltage of the AC-DC auxiliary power supply, at which time the first monostable trigger starts to output a low level, the first monostable trigger enters a steady state, the first relay K1 contact actuator of the surge suppression circuit is turned on, and the surge suppression circuit stops working;

[0071] After time t2, the charging voltage of the fourth capacitor C4 of the second monostable trigger reaches a certain value, that is, 2 / 3 of the voltage of the AC-DC auxiliary power supply. At this time, the second monostable trigger starts to output a low level, the second monostable trigger enters a steady state, the contact actuator of the second relay K2 of the power module enabling circuit is disconnected, the power module enabling circuit works, and the power module works.

[0072] In addition, in terms of timing control, it is necessary to ensure that t2>t1, and the time interval between t2 and t1 should be greater than 500ms.

[0073] The duration of the temporary stable state of the first monostable trigger and the second monostable trigger is determined by the charging state of the fourth capacitor C4, and then the specific time of t1 and t2 is adjusted by the specific values ​​of the fourth capacitor C4 and the fourth resistor R4.

[0074] The solution of the present invention realizes the control of the surge suppression circuit and the power module enabling circuit based on the monostable trigger, which can better suppress the input surge current, so that the power module has a steady-state input voltage, and realizes multiple timing control of soft start through timing control; by adjusting the time interval of the timing control, the reliability and stability of the soft start operation of the switching power supply can be improved, the surge current can be avoided, and the startup effect of the power module can be better.

[0075] The above-mentioned embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application shall be subject to the attached claims.

Claims

1. A soft start control system for a radar auxiliary power supply, characterized in that: It includes a surge suppression circuit, an AC-DC auxiliary power supply, a first monostable trigger, a second monostable trigger and a power module enabling circuit; The AC-DC auxiliary power supply is connected to the input voltage, and the output end is connected to the first monostable trigger and the second monostable trigger at the same time, wherein the output end of the first monostable trigger is connected to the surge suppression circuit, and the output end of the second monostable trigger is connected to the power module enabling circuit; The surge suppression circuit is arranged between the filter and the rectifier bridge in the radar switching power supply circuit; The power module enabling circuit is connected to the power module in the radar switch power circuit; The AC-DC auxiliary power supply is used to provide power to the surge suppression circuit, the first monostable trigger, and the second monostable trigger. The first monostable trigger and the second monostable trigger are used to control the working state and working duration of the surge suppression circuit and the power module enabling circuit, respectively.

2. The soft start control system of the radar auxiliary power supply according to claim 1, characterized in that: The first monostable trigger and the second monostable trigger both include a NE555P timer (D1), a first resistor (R1), a second resistor (R2), a third resistor (R3), a fourth resistor (R4), a fifth resistor (R5), a first capacitor (C1), a second capacitor (C2), a third capacitor (C3), a fourth capacitor (C4), a fifth capacitor (C5), and a first light-emitting diode (V1); One end of the first resistor (R1) is connected to a 15V voltage output by an AC-DC auxiliary power supply, and the other end is respectively connected to one end of a second resistor (R2), one end of a third resistor (R3), and one end of a first capacitor (C1); the other end of the second resistor (R2) and the other end of the first capacitor (C1) are grounded; the other end of the third resistor (R3) is connected to one end of the second capacitor (C2) and a TRIG pin of a NE555P timer (D1), and the other end of the second capacitor (C2) is grounded; The RE pin of the NE555P timer (D1) is connected to a 15V voltage output by an AC-DC auxiliary power supply, the Cont pin is connected in series with a third capacitor (C3) and then grounded, the GND pin is grounded, the VCC pin is connected to a 15V voltage output by an AC-DC auxiliary power supply, the DIS pin is connected in series with a fourth resistor (R4) and then respectively connected to the 15V voltage, one end of a fifth capacitor (C5), and one end of a fifth resistor (R5), the other end of the fifth capacitor (C5) is grounded, the other end of the fifth resistor (R5) is connected to an anode of a light-emitting diode (V1), and the cathode of the light-emitting diode (V1) is connected to an OUT pin of the NE555P timer (D1); The DIS pin of the NE555P timer (D1) is also connected to the THR pin and then connected in series with a fourth capacitor (C4) and then grounded.

3. The soft start control system of the radar auxiliary power supply according to claim 2, characterized in that: The surge suppression circuit comprises a second diode (V2), a first relay (K1), and a thermistor (R6); The cathode of the second diode (V2) is connected to the 15V voltage output by the AC-DC auxiliary power supply, and the anode is connected to the output signal of the first monostable trigger; an induction mechanism of the first relay (K1) is arranged between the anode and cathode of the second diode (V2); One end of the thermistor (R6) is connected to the input voltage of the radar switch power supply after filtering, and the other end is connected to each rectifier bridge in the radar switch power supply circuit; the two ends of the thermistor (R6) are also provided with a contact actuator of a relay (K1).

4. The soft start control system of the radar auxiliary power supply according to claim 2, characterized in that: The power module enabling circuit includes a third diode (V3), a fourth diode (V4), and a second relay (K2); The cathode of the third diode (V3) is connected to the 15V voltage output by the AC-DC auxiliary power supply, and the anode is connected to the output signal of the second monostable trigger; An induction mechanism of a second relay (K2) is also provided between the anode and cathode of the third diode (V3); The power module enabling circuit control terminal PC(+) is connected to the power module enabling control terminal, and the power module enabling circuit control terminal PC(-) is connected to the power module input negative terminal; A fourth diode (V4) and a contact actuator of a second relay (K2) are connected in series between the power module enabling circuit control terminal PC (+) and the power module enabling circuit control terminal PC (-).

5. The soft start control system of the radar auxiliary power supply according to claim 3 or 4, characterized in that: When the control system is working, the AC-DC auxiliary power supply is first connected to the alternating current, and the surge suppression circuit and the power module enabling circuit are respectively controlled by the first monostable trigger and the second monostable trigger, and the input surge current of the radar auxiliary power supply is suppressed by the surge suppression circuit, and the enabling operation of the power module is delayed.

6. The soft start control system of the radar auxiliary power supply according to claim 5, characterized in that: The process of using the surge suppression circuit to suppress the input surge current of the radar auxiliary power supply and delaying the enabling operation of the power module is as follows: The AC-DC auxiliary power supply is connected to the alternating current, and the initial voltages of the fourth capacitors (C4) in the first monostable trigger and the second monostable trigger are both zero, so the first monostable trigger outputs a high level and enters a temporary stable state, the surge suppression circuit receives the high level and continues to work, and at the same time, the second monostable trigger also outputs a high level and enters a temporary stable state, the power module enabling circuit does not work, and thus the power module does not work; After time t1, the charging voltage of the fourth capacitor (C4) of the first monostable trigger reaches a certain value, at which time the first monostable trigger starts to output a low level, the first monostable trigger enters a steady state, the contact actuator of the first relay (K1) of the surge suppression circuit is turned on, and the surge suppression circuit stops working; After time t2, the charging voltage of the fourth capacitor (C4) of the second monostable trigger reaches a certain value, at which time the second monostable trigger starts to output a low level, the second monostable trigger enters a steady state, the contact actuator of the second relay (K2) of the power module enabling circuit is disconnected, the power module enabling circuit works, and the power module works.

7. The soft start control system of the radar auxiliary power supply according to claim 6, characterized in that: The t2>t1, and the time interval between t2 and t1 should be greater than 500ms.

8. The soft start control system of the radar auxiliary power supply according to claim 6, characterized in that: The duration of the temporary stable state of the first monostable trigger and the second monostable trigger is determined by the charging state of the fourth capacitor (C4).

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