Onboard high-power secondary power supply device for starting power generation and power supply system

Abstract

The utility model discloses an airborne high-power secondary power supply device for starting a power generation and supply system. The airborne high-power secondary power supply device comprises an input filtering unit, an input rectification unit, a power conversion isolation unit, a control unit, a driving protection unit, an output rectification filtering unit and an auxiliary power supply unit, the input end of the input filtering unit is connected with three-phase alternating current, and the output end of the input filtering unit is sequentially connected with the input rectification unit, the power conversion isolation unit and the output rectification filtering unit; the control unit is connected with the driving protection unit and the output rectifying and filtering unit; the driving protection unit is connected with the power conversion isolation unit; the auxiliary power supply unit is connected with the input filtering unit and the control unit. The scheme has strong environmental adaptability and electromagnetic compatibility, and can stably supply power and distribute power under complex conditions such as extreme temperature, strong impact vibration, impact, electromagnetic environment and the like.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of electronics, and in particular to a starting airborne high-power secondary power supply device of a power generation and power supply system. BACKGROUND

[0002] With the continuous improvement of the reliability requirements of power supply in the field of national defense and military industry, and the demand for weapons and equipment, the military power industry continuously optimizes the circuit and structural design to realize integration, and improves the power density, efficiency and reliability of the product. At the same time, the mature production and assembly process and detection technology are used to guarantee the product quality, and the digitalization is used to replace the traditional analog control, so as to further improve the power density of the product and realize the precise monitoring of the working state of the product. CONTENT OF THE INVENTION

[0003] The embodiment of the application provides a starting airborne high-power secondary power supply device of a power generation and power supply system.

[0004] To achieve the above-mentioned purpose, the embodiment of the application provides a starting airborne high-power secondary power supply device of a power generation and power supply system, which comprises an input filter unit, an input rectifier unit, a power conversion isolation unit, a control unit, a drive protection unit, an output rectifier filter unit and an auxiliary power supply unit.

[0005] The input end of the input filter unit is connected with three-phase alternating current, and the output end of the input filter unit is connected with the input rectifier unit, the power conversion isolation unit and the output rectifier filter unit in sequence.

[0006] The control unit is connected with the drive protection unit and the output rectifier filter unit.

[0007] The drive protection unit is connected with the power conversion isolation unit, and the auxiliary power supply unit is connected with the input filter unit and the control unit.

[0008] In one embodiment, the input rectifier unit adopts a bridge full-wave rectification subunit and an LC low-pass filter subunit.

[0009] In one embodiment, the control unit comprises:

[0010] The eighth resistance R8 and the first slide rheostat W1 are connected between the eleventh resistance R11 and the signal ground; the seventeenth resistance R17 is connected between the 1 pin of the eighth integrated circuit U8 and the eleventh resistance R11; the eighth capacitor C8 is connected between the ninth resistance R9 and the signal ground, the ninth resistance R9 and the tenth resistance R10 are connected in series at the 1 pin of the eighth integrated circuit U8, the ninth resistance R9 and the ninth capacitor C9 are connected in parallel between the eighth capacitor C8 and the tenth resistance R10, the twelfth resistance R12 is connected between the 4 pin of the eighth integrated circuit U8 and the signal ground, the eleventh capacitor C11 is connected in parallel between the sixteenth resistance R16 and the fifteenth resistance R15, the tenth capacitor C10 is connected across the fifteenth resistance R15, one end of the tenth capacitor C10 is connected to the 3 pin of the eighth integrated circuit U8, and the other end of the tenth capacitor C10 is connected to the 2 pin of the eighth integrated circuit U8; the fourteenth capacitor C14 is connected between the 5 pin of the eighth integrated circuit U8 and the signal ground; the nineteenth resistance R19 is connected between the 6 pin of the eighth integrated circuit U8 and the signal ground; the 7 pin of the eighth integrated circuit U8 is shorted to the signal ground; the twentieth resistance R20 is connected between the 8 pin of the eighth integrated circuit U8 and +15V, the thirteenth resistance R13 is connected between the 11 pin of the eighth integrated circuit U8 and +15V, the thirteenth capacitor C13 and the thirty-first resistance R31 are connected between the 4 pin of the eighth integrated circuit U8 and the signal ground; one end of the twelfth capacitor C12 is connected to the 2 pin and the 15 pin of the eighth integrated circuit U8, the other end of the twelfth capacitor C12 is grounded, the 16 pin of the eighth integrated circuit U8 is shorted to the signal ground through the thirty-second resistance R32; the 16 pin of the eighth integrated circuit U8 is connected to one end of the thirty-third capacitor C33, one end of the thirty-fourth capacitor C34, and one end of the thirty-fourth resistance R34, the other end of the thirty-fourth capacitor C34 and the other end of the thirty-fourth resistance R34 are connected to one end of the third slide rheostat W3 and one end of the thirty-third resistance R33, the other end of the third slide rheostat W3 is connected to one end of the thirty-second capacitor C32 and the 1 pin of the fourth connector J4; the 2 pin of the fourth connector J4, the other end of the thirty-second capacitor C32, the other end of the thirty-third resistance R33, and the other end of the thirty-third capacitor C33 are grounded; the 13 pin and the 14 pin of the eighth integrated circuit U8 are shorted to 5V, the eleventh resistance R11 is connected between the 14 pin and the 15 pin of the eighth integrated circuit U8; the twelfth resistance R12 and the twenty-eighth capacitor C28 are connected in parallel between the 15 pin of the eighth integrated circuit U8 and the signal ground; the 9 pin and the 10 pin of the eighth integrated circuit U8 are shorted to the signal ground; the twenty-ninth capacitor C29 and the thirtieth capacitor C30 are connected in parallel between the 12 pin of the eighth integrated circuit U8 and the signal ground;

[0011] The c pin of the triode Q1 is connected to the 4 pin of the eighth integrated circuit U8, the eighteenth resistor R18 is connected between the b pin of the triode Q1 and the fifteenth capacitor C15, the fourteenth resistor R14 is connected between the b pin and the a pin of the triode Q1, and the a pin of the triode Q1 is connected to 5V; the other end of the fifteenth capacitor C15 is connected to the signal ground; the positive pole of the fifth diode D5 is connected to the fifteenth capacitor C15, the negative pole of the fifth diode D5 is connected to the 6 pin of the fourth integrated circuit U4, the 7 pin of the fourth integrated circuit U4 is connected to the 11 pin of the fifth integrated circuit U5; the 3 pin of the fifth integrated circuit U5 is connected to the 12 pin of the fifth integrated circuit U5; the 2 pin of the fifth integrated circuit U5 is connected to the 11 pin of the fifth integrated circuit U5, and the 5 pin, the 6 pin, the 8 pin and the 9 pin of the fifth integrated circuit U5 are short-circuited to the signal ground; the twenty-seventh resistor R27 and the ninth diode D9 are connected in parallel between +15V and the 13 pin of the fifth integrated circuit U5, and the twentieth capacitor C20 is connected between the 13 pin of the fifth integrated circuit U5 and the signal ground; the 1 pin of the fifth integrated circuit U5 is connected to the twenty-second resistor R22, and the other end of the twenty-second resistor R22 is connected to +15V;

[0012] The seventeenth capacitor C17 and the second slide resistor W2 are connected in parallel between 5V and the signal ground; the second slide resistor W2 is connected to the 2 pin of the tenth integrated circuit U10; the thirtieth resistor R30, the eighteenth capacitor C18 and the nineteenth capacitor C19 are connected in parallel between the 3 pin of the tenth integrated circuit U10 and the signal ground; the twenty-ninth resistor R29 is connected between the first slide rheostat W1 and the 3 pin of the tenth integrated circuit U10; the 1 pin of the tenth integrated circuit U10 and the 4 pin of the tenth integrated circuit U10 are connected to the signal ground, and the 5 pin, the 6 pin and the 8 pin of the tenth integrated circuit U10 are connected to +15V; the sixth diode D6 is connected between the 7 pin of the tenth integrated circuit U10 and the 1 pin of the fifth integrated circuit U5; the twenty-eighth resistor R28 is connected between +15V and the negative pole of the sixth diode D6;

[0013] The twenty-first resistor R21 is connected between the 9 pin of the fourth integrated circuit U4 and the 13 pin and the 6 pin of the second connector J2; the 10 pin of the fourth integrated circuit U4 is connected to the 1 pin of the fifth integrated circuit U5; the sixteenth capacitor C16 is connected between the signal ground and the 10 pin of the fourth integrated circuit U4;

[0014] The twenty-third capacitor C23, the twenty-fourth capacitor C24 and the twenty-fifth capacitor C25 are connected between +15V and the signal ground;

[0015] The twenty-sixth capacitor C26 is connected between the pin 5 of the sixth integrated circuit U6 and the signal ground; the twenty-seventh capacitor C27 is connected between the pin 1 of the sixth integrated circuit U6 and the signal ground; the pin 5 of the sixth integrated circuit U6 is shorted with the pin 6 of the sixth integrated circuit U6, and the pin 1 of the sixth integrated circuit U6 is shorted with the pin 2 of the sixth integrated circuit U6; the twenty-first capacitor C21 is connected at one end to the joint between the twenty-third resistor R23 and the twenty-fourth resistor R24, and the seventh diode D7 is connected between the twenty-third resistor R23 and the twenty-fourth resistor R24; the other end of the twenty-third resistor R23 is connected to the pin 8 of the eighth integrated circuit U8; the twenty-fourth resistor R24 is connected to the pin 5 of the fifth integrated circuit U8; the twenty-second capacitor C22 is connected at one end to the joint between the twenty-fifth resistor R25 and the twenty-sixth resistor R26, and at the other end to the signal ground; the eighth diode D8 is connected between the twenty-fifth resistor R25 and the twenty-sixth resistor R26, the other end of the twenty-fifth resistor R25 is connected to the pin 11 of the eighth integrated circuit U8, and the other end of the twenty-sixth resistor R26 is connected to the pin 1 of the sixth integrated circuit U6; the pin 9 of the sixth integrated circuit U6 is shorted with the pin 12 of the sixth integrated circuit U6, and the pin 6 of the fourth integrated circuit U4; the pin 4 of the sixth integrated circuit U6 is shorted with the pin 8 of the sixth integrated circuit U6, and the pin 3 of the sixth integrated circuit U6 is shorted with the pin 13 of the sixth integrated circuit U6; the pin 10 of the sixth integrated circuit U6 is connected to the pin 14 and the pin 3 of the seventh integrated circuit U7; the pin 11 of the sixth integrated circuit U6 is connected to the pin 11 and the pin 5 of the seventh integrated circuit U7.

[0016] The pin 15 of the seventh integrated circuit U7 is shorted with the pin 15 and the pin 8 of the second connector J2, and the pin 15 and the pin 8 of the third connector J3; the pin 12 of the seventh integrated circuit U7 is shorted with the pin 14 and the pin 7 of the second connector J2, and the pin 14 and the pin 7 of the third connector J3.

[0017] In one of the embodiments, the drive protection unit comprises:

[0018] The first capacitor C1 is connected between the pin 14 of the third integrated circuit U3 and the signal ground, and the pin 14 of the third integrated circuit U3 is shorted with the pin 4 of the first integrated circuit U1; the first resistor R1 is connected between the pin 4 of the first integrated circuit U1 and +15V; the pin 3 of the first integrated circuit U1 is shorted with the signal ground; the third resistor R3 is connected between the pin 1 of the first integrated circuit U1 and the pin 2 of the first integrated circuit U1; the fourth resistor R4 is connected between the pin 1 of the first integrated circuit U1 and the pin 4 of the second integrated circuit U2; the pin 2 of the first integrated circuit U1 is shorted with the pin 8 of the second integrated circuit U2.

[0019] The second resistor R2 is connected between the pin 13 of the second integrated circuit U2 and the pin 2 of the third integrated circuit U3; the pin 1 of the third integrated circuit U3 is connected to +15V, the pin 8 of the third integrated circuit U3 is connected to the signal ground, and the second capacitor C2 is connected between +15V and the signal ground.

[0020] The 14th pin of the second integrated circuit U2 is shorted to +15V; the fifth resistor R5 is connected in series with the second diode D2 and then connected between the 1st pin of the second integrated circuit U2 and the 1st pin of the first connector J1; the first diode D1 is connected between the 1st pin of the second integrated circuit U2 and the 6th pin of the second integrated circuit U2; the sixth resistor R6 is connected between the 5th pin of the second integrated circuit U2 and the 2nd pin of the first connector J1; the third diode D3 and the fourth diode D4 are connected in series and then connected between the 2nd pin and the 4th pin of the first connector J1; the seventh resistor R7 is connected between the 2nd pin and the 4th pin of the first connector J1; the fourth capacitor C4 and the sixth capacitor C6 are connected in parallel, and the fifth capacitor C5 and the seventh capacitor C7 are connected in parallel, and then the two ends of the connection are connected between the 4th pin of the second integrated circuit U2 and the 6th pin of the second integrated circuit U2; the third capacitor C3 is connected between the 4th pin of the second integrated circuit U2 and the 2nd pin of the second integrated circuit U2; and the 4th pin of the second integrated circuit U2 is connected to +15V.

[0021] In one of the embodiments, the starting power generation and power supply system airborne high-power secondary power supply device further comprises:

[0022] The soft start unit is connected with the output end of the input filter unit and the input end of the input rectifier unit respectively; and the soft start unit is also connected with the auxiliary power supply unit.

[0023] Compared with the prior art, the application has the following beneficial effects: strong environmental adaptability and electromagnetic compatibility, and stable power supply and distribution under complex conditions such as extreme temperature, strong impact vibration, impact and electromagnetic environment. BRIEF DESCRIPTION OF DRAWINGS

[0024] In order to more clearly illustrate the technical solutions of the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0025] Figure 1 The frame schematic diagram of the starting power generation and power supply system airborne high-power secondary power supply device in the embodiment of the present application;

[0026] Figure 2 The principle schematic diagram of the input filter unit in the starting power generation and power supply system airborne high-power secondary power supply device in the embodiment of the present application;

[0027] Figure 3 The principle schematic diagram of the input rectifier unit in the starting power generation and power supply system airborne high-power secondary power supply device in the embodiment of the present application;

[0028] Figure 4The principle diagram of the power conversion isolation unit in the airborne high-power secondary power supply device of the starting power generation and power supply system of the embodiment of the present application is shown in the figure;

[0029] Figure 5 The principle diagram of the output rectification filter unit in the airborne high-power secondary power supply device of the starting power generation and power supply system of the embodiment of the present application is shown in the figure;

[0030] Figure 6 The principle diagram of the control unit in the airborne high-power secondary power supply device of the starting power generation and power supply system of the embodiment of the present application is shown in the figure;

[0031] Figure 7 The principle diagram of the drive protection unit in the airborne high-power secondary power supply device of the starting power generation and power supply system of the embodiment of the present application is shown in the figure;

[0032] Figure 8 The principle diagram of the soft start unit in the airborne high-power secondary power supply device of the starting power generation and power supply system of the embodiment of the present application is shown in the figure. DETAILED DESCRIPTION

[0033] The technical solutions in the embodiments of the present application will be described clearly and completely below with the accompanying drawings of the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, but not all the embodiments of the present application. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative work are within the protection scope of the present application.

[0034] In the description of the present application, it should be understood that the orientations or positional relationships indicated by the terms “center”, “upper”, “lower”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inner”, “outer” and the like are the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0035] In the description of the present application, it should be noted that, unless otherwise explicitly specified and limited, the terms “mounting”, “connection”, “connecting” should be understood in a broad sense, for example, it can be fixed connection, or detachable connection, or integrally connected; for those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0036] The terms "first", "second", "third", etc. are used only for descriptive purposes and do not connote or imply relative importance or an ordering between or among the indicated technical features. Thus, a feature defined with "first", "second", etc. can include one or more of the features implicitly or explicitly.

[0037] As shown in Figure 1 The embodiment of the present application provides a starting power supply device of a power generation and power supply system airborne high-power secondary power supply, in order to meet the power supply demand, the power supply device needs to meet the following electrical performance requirements: input three-phase rated voltage / frequency: 115VAC (115 Volts Alternating Current) / 400Hz (108-118VAC / 375-425Hz); having input under-voltage protection function and input open-phase protection function; rated output power: not less than 25kW; output voltage: 28.5VDC (28.5 Volts Direct Current) ± 0.5VDC, adjustable to 30.0VDC as needed; transient output current: not less than 2000A; load regulation: ≤2%; conversion efficiency: ≥90%; having output over / under-voltage protection, short-circuit protection and equipment over-temperature protection function.

[0038] With reference to Figure 1 The embodiment of the present application provides a starting power supply device of a power generation and power supply system airborne high-power secondary power supply, comprising: an input filter unit 1, an input rectifier unit 2, a power conversion isolation unit 3, a control unit 4, a drive protection unit 5, an output rectifier filter unit 6, an auxiliary power supply unit 7.

[0039] The input end of the input filter unit 1 is connected with three-phase alternating current, and the output end of the input filter unit 1 is connected with the input rectifier unit 2, the power conversion isolation unit 3 and the output rectifier filter unit 6 in sequence.

[0040] The control unit 4 is connected with the drive protection unit 5 and the output rectifier filter unit 6.

[0041] The drive protection unit 5 is connected with the power conversion isolation unit 3, and the auxiliary power supply unit 7 is connected with the input filter unit 1 and the control unit 4.

[0042] Specifically, the three-phase alternating current passes through the input filter unit 1, then passes through the input rectifier unit 2 and the power conversion isolation unit 3, converts the three-phase 115V power supply into high-precision stabilized voltage, and then passes through the output rectifier filter unit 6 to obtain the required direct current voltage.

[0043] The input filter unit 1 can be a three-phase AC EMI (Electromagnetic Interference) filter module composed of capacitors and inductors, featuring high differential-mode and common-mode attenuation and low series resistance. For example, it can be... Figure 2 The circuit schematic shown is implemented.

[0044] Input rectifier unit 2 is used to convert single-phase 115V to DC 270V output. As shown in Figure 3, input rectifier unit 2 adopts a general-purpose bridge full-wave rectifier subunit and an LC (Inductor-Capacitor) low-pass filter subunit. Understandably, adding a digital PFC (Power Factor Correction) unit can improve the input power factor and reduce the impact on the power grid.

[0045] For example, the power conversion isolation unit 3 can adopt Figure 4 The circuit schematic shown illustrates the following steps: First, the 270V DC voltage after rectification is modulated into a 540V high-frequency square wave using SPWM (Sine Pulse Width Modulation). Second, the 540V AC square wave voltage is stepped down to a 90V square wave voltage. The efficiency of modulating the 270V AC voltage to a 540V high-frequency square wave directly affects the overall efficiency of the device. Therefore, it is required that the switching devices have low saturation voltage drop, low reverse leakage current, and high switching speed to reduce device losses. To ensure output power, reduce noise and electromagnetic radiation, and consider transformer size, a 0.01m superconducting silicon steel sheet is used for the transformer core when stepping down the 540V AC square wave voltage to 90V.

[0046] The output rectifier and filter unit 6 uses a typical rectifier circuit, for example, such as... Figure 5 As shown, after passing through an LC filter circuit, the output is first smoothed and filtered by an inductor, and then rectified by an output capacitor to achieve a DC output of 28V. The output common-mode inductor is wound with a nanocrystalline iron core, which has the characteristics of high permeability and strong common-mode rejection capability, and can effectively reduce the output noise of the power supply.

[0047] This unit consists of an LC filter circuit and a common-mode filter circuit, which can effectively reduce output ripple to meet the product's output ripple voltage requirements.

[0048] The LC filter circuit consists of a reactor and an output capacitor. The reactor is made of iron-silicon-aluminum material and has the characteristics of low permeability and large overcurrent. The output capacitor can reduce the output ripple of the power supply.

[0049] The auxiliary power supply unit 7 is used to provide power supply for the whole power supply device. It uses the existing power supply module, and has the characteristics of wide input power range, high electrical isolation, stable and reliable working performance, strong anti-interference, and wide temperature adaptation range.

[0050] The control unit 4 core selects a special switch management chip. The control circuit provides driving pulses for the power tubes of the power conversion isolation unit 3, enhances the driving pulse ability through the driving board, and controls the power tubes in real time. And the protection signal is connected externally. When the protection signal is valid, the driving pulse is closed, the work is stopped, and the output is terminated. The control circuit samples the voltage and current, performs double-loop control, and sends the control signal to the MCU (Microcontroller Unit) in real time. The MCU realizes the voltage stabilization of the power supply by changing the output pulse width, as shown in Figure 6 .

[0051] The protection circuit mainly has overvoltage, output short circuit, overload and overheat protection functions. The overcurrent and overvoltage detection are realized by detecting the voltage output by the rectification conversion, detecting the output current by the Hall sensor and detecting the short circuit of the same arm of the IGBT (Insulated Gate Bipolar Transistor). The corresponding protection circuit is controlled to realize various protection functions. The protection detection unit completes the monitoring of the output voltage and current. When the value exceeds the specified value, a protection output signal is generated to the 28VDC direct current control unit 4, so that the starting power supply enters the protection state.

[0052] In one embodiment, continuing to refer to Figure 6 , the control unit 4 includes:

[0053] The eighth resistance R8 and the first slide rheostat W1 are connected between the eleventh resistance R11 and the signal ground; the seventeenth resistance R17 is connected between the 1 pin of the eighth integrated circuit U8 and the eleventh resistance R11; the eighth capacitor C8 is connected between the ninth resistance R9 and the signal ground, the ninth resistance R9 and the tenth resistance R10 are connected in series at the 1 pin of the eighth integrated circuit U8, the ninth resistance R9 and the ninth capacitor C9 are connected in parallel between the eighth capacitor C8 and the tenth resistance R10, the twelfth resistance R12 is connected between the 4 pin of the eighth integrated circuit U8 and the signal ground, the eleventh capacitor C11 is connected in parallel between the sixteenth resistance R16 and the fifteenth resistance R15, the tenth capacitor C10 is connected across the fifteenth resistance R15, one end of the tenth capacitor C10 is connected to the 3 pin of the eighth integrated circuit U8, and the other end of the tenth capacitor C10 is connected to the 2 pin of the eighth integrated circuit U8; the fourteenth capacitor C14 is connected between the 5 pin of the eighth integrated circuit U8 and the signal ground; the nineteenth resistance R19 is connected between the 6 pin of the eighth integrated circuit U8 and the signal ground; the 7 pin of the eighth integrated circuit U8 is shorted to the signal ground; the twentieth resistance R20 is connected between the 8 pin of the eighth integrated circuit U8 and +15V, the thirteenth resistance R13 is connected between the 11 pin of the eighth integrated circuit U8 and +15V, the thirteenth capacitor C13 and the thirty-first resistance R31 are connected across the 4 pin of the eighth integrated circuit U8 and 5V; one end of the twelfth capacitor C12 is connected to the 2 pin and the 15 pin of the eighth integrated circuit U8, and the other end of the twelfth capacitor C12 is grounded, the 16 pin of the eighth integrated circuit U8 is shorted to the signal ground through the thirty-second resistance R32; the 16 pin of the eighth integrated circuit U8 is connected to one end of the thirty-third capacitor C33, one end of the thirty-fourth capacitor C34, and one end of the thirty-fourth resistance R34, the other end of the thirty-fourth capacitor C34 and the other end of the thirty-fourth resistance R34 are connected to one end of the third slide rheostat W3 and one end of the thirty-third resistance R33, the other end of the third slide rheostat W3 is connected to one end of the thirty-second capacitor C32 and the 1 pin of the fourth connector J4; the 2 pin of the fourth connector J4, the other end of the thirty-second capacitor C32, the other end of the thirty-third resistance R33, and the other end of the thirty-third capacitor C33 are grounded; the 13 pin and the 14 pin of the eighth integrated circuit U8 are shorted to 5V, and the eleventh resistance R11 is connected between the 14 pin and the 15 pin of the eighth integrated circuit U8; the twelfth resistance R12 and the twenty-eighth capacitor C28 are connected in parallel between the 15 pin of the eighth integrated circuit U8 and the signal ground; the 9 pin and the 10 pin of the eighth integrated circuit U8 are shorted to the signal ground; the twenty-ninth capacitor C29 and the thirtieth capacitor C30 are connected in parallel between the 12 pin of the eighth integrated circuit U8 and the signal ground;

[0054] The c pin of the triode Q1 is connected to the 4 pin of the eighth integrated circuit U8, the eighteenth resistor R18 is connected between the b pin of the triode Q1 and the fifteenth capacitor C15, the fourteenth resistor R14 is connected between the b pin and the a pin of the triode Q1, and the a pin of the triode Q1 is connected to 5V; the other end of the fifteenth capacitor C15 is connected to the signal ground; the positive pole of the fifth diode D5 is connected to the fifteenth capacitor C15, the negative pole of the fifth diode D5 is connected to the 6 pin of the fourth integrated circuit U4, the 7 pin of the fourth integrated circuit U4 is connected to the 11 pin of the fifth integrated circuit U5; the 3 pin of the fifth integrated circuit U5 is connected to the 12 pin of the fifth integrated circuit U5; the 2 pin of the fifth integrated circuit U5 is connected to the 11 pin of the fifth integrated circuit U5, and the 5 pin, the 6 pin, the 8 pin and the 9 pin of the fifth integrated circuit U5 are short-circuited to the signal ground; the twenty-seventh resistor R27 and the ninth diode D9 are connected in parallel between +15V and the 13 pin of the fifth integrated circuit U5, and the twentieth capacitor C20 is connected between the 13 pin of the fifth integrated circuit U5 and the signal ground; the 1 pin of the fifth integrated circuit U5 is connected to the twenty-second resistor R22, and the other end of the twenty-second resistor R22 is connected to +15V;

[0055] The seventeenth capacitor C17 and the second slide resistor W2 are connected in parallel between 5V and the signal ground; the second slide resistor W2 is connected to the 2 pin of the tenth integrated circuit U10; the thirtieth resistor R30, the eighteenth capacitor C18 and the nineteenth capacitor C19 are connected in parallel between the 3 pin of the tenth integrated circuit U10 and the signal ground; the twenty-ninth resistor R29 is connected between the first slide rheostat W1 and the 3 pin of the tenth integrated circuit U10; the 1 pin of the tenth integrated circuit U10 and the 4 pin of the tenth integrated circuit U10 are connected to the signal ground, and the 5 pin, the 6 pin and the 8 pin of the tenth integrated circuit U10 are connected to +15V; the sixth diode D6 is connected between the 7 pin of the tenth integrated circuit U10 and the 1 pin of the fifth integrated circuit U5; the twenty-eighth resistor R28 is connected between +15V and the negative pole of the sixth diode D6;

[0056] The twenty-first resistor R21 is connected between the 9 pin of the fourth integrated circuit U4 and the 13 pin and the 6 pin of the second connector J2; the 10 pin of the fourth integrated circuit U4 is connected to the 1 pin of the fifth integrated circuit U5; the sixteenth capacitor C16 is connected between the signal ground and the 10 pin of the fourth integrated circuit U4;

[0057] The twenty-third capacitor C23, the twenty-fourth capacitor C24 and the twenty-fifth capacitor C25 are connected between +15V and the signal ground;

[0058] The twenty-sixth capacitor C26 is connected between the 5th pin of the sixth integrated circuit U6 and the signal ground; the twenty-seventh capacitor C27 is connected between the 1st pin of the sixth integrated circuit U6 and the signal ground; the 5th pin and the 6th pin of the sixth integrated circuit U6 are shorted, and the 1st pin and the 2nd pin of the sixth integrated circuit U6 are shorted; one end of the twenty-first capacitor C21 is connected to the connection point between the twenty-third resistor R23 and the twenty-fourth resistor R24, and the seventh diode D7 is connected between the twenty-third resistor R23 and the twenty-fourth resistor R24; the other end of the twenty-third resistor R23 is connected to the 8th pin of the eighth integrated circuit U8; the twenty-fourth resistor R24 is connected to the 5th pin of the fifth integrated circuit U8; one end of the twenty-second capacitor C22 is connected to the connection point between the twenty-fifth resistor R25 and the twenty-sixth resistor R26, and the other end is connected to the signal ground; the eighth diode D8 is connected between the twenty-fifth resistor R25 and the twenty-sixth resistor R26, and the other end of the twenty-fifth resistor R25 is connected to the 11th pin of the eighth integrated circuit U8, and the other end of the twenty-sixth resistor R26 is connected to the 1st pin of the sixth integrated circuit U6; the 9th pin and the 12th pin of the sixth integrated circuit U6 are shorted to the 6th pin of the fourth integrated circuit U4; the 4th pin and the 8th pin of the sixth integrated circuit U6 are shorted, and the 3rd pin and the 13th pin of the sixth integrated circuit U6 are shorted; the 10th pin of the sixth integrated circuit U6 is connected to the 14th pin and the 3rd pin of the seventh integrated circuit U7; the 11th pin of the sixth integrated circuit U6 is connected to the 11th pin and the 5th pin of the seventh integrated circuit U7.

[0059] The 15th pin and the 2nd pin of the seventh integrated circuit U7 are shorted to the 15th pin and the 8th pin of the second connector J2 and the 15th pin and the 8th pin of the third connector J3; the 12th pin and the 4th pin of the seventh integrated circuit U7 are shorted to the 14th pin and the 7th pin of the second connector J2 and the 14th pin and the 7th pin of the third connector J3.

[0060] The driving protection unit 5 mainly functions to enhance the pulse signal output by the control unit 4 and output to the power switch tube. The driving protection unit 5 mainly functions to amplify the driving signal in power and ensure a certain pulse front and rear edge steepness, so as to have sufficient ability to saturate the IGBT conduction, as shown in the figure. At the same time, the driving protection unit 5 also plays the role of electrical isolation of the control unit 4 and the main circuit and the role of collecting fault signals. Figure 7

[0061] ​According to the static and dynamic characteristics of IGBT, the following requirements and conditions are proposed for the driving circuit of IGBT: Since it is a capacitive input impedance, the IGBT is very sensitive to the gate charge accumulation, and the driving circuit must be reliable to ensure a low-resistance discharge loop. The gate capacitor is charged and discharged by a low-impedance driving source to ensure that the gate control voltage U has a steep rising and falling edge, so that the switching loss of IGBT is as small as possible. In addition, after the IGBT is turned on, the gate driving source should provide sufficient power to prevent the IGBT from exiting saturation and being damaged. The gate drive circuit should be as simple and practical as possible, have self-protection function for IGBT, and have strong anti-interference ability.

[0062] In one embodiment, continuing to refer to Figure 7 , the drive protection unit 5 comprises:

[0063] The first capacitor C1 is connected across the 14th pin of the third integrated circuit U3 and the signal ground, and the 14th pin of the third integrated circuit U3 is short-circuited to the 4th pin of the first integrated circuit U1; the first resistor R1 is connected across the 4th pin of the first integrated circuit U1 and +15V; the 3rd pin of the first integrated circuit U1 is short-circuited to the signal ground; the third resistor R3 is connected across the 1st pin of the first integrated circuit U1 and the 2nd pin of the first integrated circuit U1; the fourth resistor R4 is connected across the 1st pin of the first integrated circuit U1 and the 4th pin of the second integrated circuit U2; the 2nd pin of the first integrated circuit U1 and the 8th pin of the second integrated circuit U2 are short-circuited;

[0064] The second resistor R2 is connected across the 13th pin of the second integrated circuit U2 and the 2nd pin of the third integrated circuit U3; the 1st pin of the third integrated circuit U3 is connected to +15V, the 8th pin of the third integrated circuit U3 is connected to the signal ground, and the second capacitor C2 is connected across +15V and the signal ground;

[0065] The 14th pin of the second integrated circuit U2 is short-circuited to +15V; the fifth resistor R5 is connected in series with the second diode D2 and then connected across the 1st pin of the second integrated circuit U2 and the 1st pin of the first connector J1; the first diode D1 is connected across the 1st pin of the second integrated circuit U2 and the 6th pin of the second integrated circuit U2; the sixth resistor R6 is connected across the 5th pin of the second integrated circuit U2 and the 2nd pin of the first connector J1; the third diode D3 and the fourth diode D4 are connected in series and then connected across the 2nd pin and the 4th pin of the first connector J1; the seventh resistor R7 is connected across the 2nd pin and the 4th pin of the first connector J1; the fourth capacitor C4 and the sixth capacitor C6 are connected in parallel, and the fifth capacitor C5 and the seventh capacitor C7 are connected in parallel, and then connected across the 4th pin of the second integrated circuit U2 and the 6th pin of the second integrated circuit U2; the third capacitor C3 is connected across the 4th pin of the second integrated circuit U2 and the 2nd pin of the second integrated circuit U2; the 4th pin of the second integrated circuit U2 is connected to +15V.

[0066] In order to solve the problem of too large input starting impulse current, and the influence on the airborne power grid during starting, the airborne high-power secondary power supply device of the starting power generation and power supply system is provided with a soft starting unit, which mainly realizes the time delay of the input power and cooperates with the soft starting.

[0067] In one embodiment, the airborne high-power secondary power supply device of the starting power generation and power supply system further comprises a soft starting unit 8, which is connected with the output end of the input filter unit 1 and the input end of the input rectifier unit 2 respectively; the soft starting unit 8 is also connected with the auxiliary power supply unit 7. Exemplarily, the soft starting unit can adopt a circuit principle diagram as shown in the figure. Figure 8 The soft starting unit can be realized by the circuit principle diagram as shown in the figure.

[0068] The airborne high-power secondary power supply device of the starting power generation and power supply system provided by the application greatly improves the electromagnetic compatibility of the airborne high-power secondary power supply device of the starting power generation and power supply system through the reasonable layout of the input filter unit, the output rectifier filter unit and the whole device.

[0069] The airborne high-power secondary power supply device of the starting power generation and power supply system provided by the application is used to realize the normal / emergency starting verification of the engine, successfully fills the gap in the field, and makes a major breakthrough in the key indicators such as reliability, volume and power density. Compared with the traditional power supply, it has stronger environmental adaptability and electromagnetic compatibility, and can stably supply and distribute power under complex conditions such as extreme temperature, strong impact vibration, impact and electromagnetic environment.

[0070] The above is only a specific embodiment of the application, but the protection scope of the application is not limited to this, any change or replacement within the technical scope disclosed by the application should be covered in the protection scope of the application. Therefore, the protection scope of the application should be subject to the protection scope of the claims.

Claims

1. A method for starting a high-power onboard secondary power supply device of a power generation and supply system, characterized by, It includes: Input filter unit (1), input rectifier unit (2), power conversion isolation unit (3), control unit (4), drive protection unit (5), output rectifier filter unit (6), auxiliary power supply unit (7); The input end of the input filter unit (1) is connected with three-phase alternating current, and the output end of the input filter unit (1) is connected with the input rectifier unit (2), the power conversion isolation unit (3) and the output rectifier filter unit (6) in sequence; The control unit (4) is connected with the drive protection unit (5) and the output rectifier filter unit (6); The drive protection unit (5) is connected with the power conversion isolation unit (3), and the auxiliary power supply unit (7) is connected with the input filter unit (1) and the control unit (4).

2. The startup power supply device according to claim 1, wherein The input rectifier unit (2) adopts bridge full-wave rectifier subunit and LC low-pass filter subunit.

3. The on-board high power secondary power supply powered device for starting a power generation and power supply system of claim 1, wherein, The control unit (4) includes: The eighth resistance R8 and the first slide rheostat W1 are connected between the eleventh resistance R11 and the signal ground; the seventeenth resistance R17 is connected between the 1 pin of the eighth integrated circuit U8 and the eleventh resistance R11; the eighth capacitor C8 is connected between the ninth resistance R9 and the signal ground, the ninth resistance R9 and the tenth resistance R10 are connected in series at the 1 pin of the eighth integrated circuit U8, the ninth resistance R9 and the ninth capacitor C9 are connected in parallel between the eighth capacitor C8 and the tenth resistance R10, the twelfth resistance R12 is connected between the 4 pin of the eighth integrated circuit U8 and the signal ground, the eleventh capacitor C11 is connected in parallel between the sixteenth resistance R16 and the fifteenth resistance R15, the tenth capacitor C10 is connected across the fifteenth resistance R15, one end of the tenth capacitor C10 is connected to the 3 pin of the eighth integrated circuit U8, and the other end of the tenth capacitor C10 is connected to the 2 pin of the eighth integrated circuit U8; the fourteenth capacitor C14 is connected between the 5 pin of the eighth integrated circuit U8 and the signal ground; the nineteenth resistance R19 is connected between the 6 pin of the eighth integrated circuit U8 and the signal ground; the 7 pin of the eighth integrated circuit U8 is shorted to the signal ground; the twentieth resistance R20 is connected between the 8 pin of the eighth integrated circuit U8 and +15V, the thirteenth resistance R13 is connected between the 11 pin of the eighth integrated circuit U8 and +15V, the thirteenth capacitor C13 and the thirty-first resistance R31 are connected between the 4 pin of the eighth integrated circuit U8 and the signal ground; one end of the twelfth capacitor C12 is connected to the 2 pin and the 15 pin of the eighth integrated circuit U8, the other end of the twelfth capacitor C12 is grounded, the 16 pin of the eighth integrated circuit U8 is shorted to the signal ground through the thirty-second resistance R32; the 16 pin of the eighth integrated circuit U8 is connected to one end of the thirty-third capacitor C33, one end of the thirty-fourth capacitor C34, and one end of the thirty-fourth resistance R34, the other end of the thirty-fourth capacitor C34 and the other end of the thirty-fourth resistance R34 are connected to one end of the third slide rheostat W3 and one end of the thirty-third resistance R33, the other end of the third slide rheostat W3 is connected to one end of the thirty-second capacitor C32 and the 1 pin of the fourth connector J4; the 2 pin of the fourth connector J4, the other end of the thirty-second capacitor C32, the other end of the thirty-third resistance R33, and the other end of the thirty-third capacitor C33 are grounded; the 13 pin and the 14 pin of the eighth integrated circuit U8 are shorted to 5V, the eleventh resistance R11 is connected between the 14 pin and the 15 pin of the eighth integrated circuit U8; the twelfth resistance R12 and the twenty-eighth capacitor C28 are connected in parallel between the 15 pin of the eighth integrated circuit U8 and the signal ground; the 9 pin and the 10 pin of the eighth integrated circuit U8 are shorted to the signal ground; the twenty-ninth capacitor C29 and the thirtieth capacitor C30 are connected in parallel between the 12 pin of the eighth integrated circuit U8 and the signal ground; The c pin of the triode Q1 is connected with the 4 pin of the eighth integrated circuit U8, the eighteenth resistance R18 is connected between the b pin of the triode Q1 and the fifteenth capacitor C15, the fourteenth resistance R14 is connected between the b pin and the a pin of the triode Q1, the a pin of the triode Q1 is connected with 5V; the other end of the fifteenth capacitor C15 is connected with the signal ground; the positive pole of the fifth diode D5 is connected with the fifteenth capacitor C15, the negative pole of the fifth diode D5 is connected with the 6 pin of the fourth integrated circuit U4, the 7 pin of the fourth integrated circuit U4 is connected with the 11 pin of the fifth integrated circuit U5; the 3 pin of the fifth integrated circuit U5 is connected with the 12 pin of the fifth integrated circuit U5; the 2 pin of the fifth integrated circuit U5 is connected with the 11 pin of the fifth integrated circuit U5, the 5 pin, the 6 pin, the 8 pin and the 9 pin of the fifth integrated circuit U5 are short-circuited with the signal ground; the twenty-seventh resistance R27 and the ninth diode D9 are connected in parallel between +15V and the 13 pin of the fifth integrated circuit U5, the twentieth capacitor C20 is connected between the 13 pin of the fifth integrated circuit U5 and the signal ground; the 1 pin of the fifth integrated circuit U5 is connected with the twenty-second resistance R22, the other end of the twenty-second resistance R22 is connected with +15V; The seventeenth capacitor C17 and the second slide resistor W2 are connected in parallel between 5V and the signal ground; the second slide resistor W2 is connected with the 2 pin of the tenth integrated circuit U10; the thirtieth resistance R30, the eighteenth capacitor C18 and the nineteenth capacitor C19 are connected in parallel between the 3 pin of the tenth integrated circuit U10 and the signal ground; the twenty-ninth resistance R29 is connected between the first slide rheostat W1 and the 3 pin of the tenth integrated circuit U10; the 1 pin of the tenth integrated circuit U10 and the 4 pin of the tenth integrated circuit U10 are connected with the signal ground, the 5 pin, the 6 pin and the 8 pin of the tenth integrated circuit U10 are connected with +15V; the sixth diode D6 is connected between the 7 pin of the tenth integrated circuit U10 and the 1 pin of the fifth integrated circuit U5; the twenty-eighth resistance R28 is connected between +15V and the negative pole of the sixth diode D6; The twenty-first resistance R21 is connected between the 9 pin of the fourth integrated circuit U4 and the 13 pin and the 6 pin of the second connector J2; the 10 pin of the fourth integrated circuit U4 is connected with the 1 pin of the fifth integrated circuit U5; the sixteenth capacitor C16 is connected between the signal ground and the 10 pin of the fourth integrated circuit U4; The twenty-third capacitor C23, the twenty-fourth capacitor C24 and the twenty-fifth capacitor C25 are connected between +15V and the signal ground; The sixth integrated circuit U6 has a 5th pin and a 6th pin shorted, a 1st pin and a 2nd pin shorted; the 5th pin and the 6th pin of the sixth integrated circuit U6 are connected to the 6th pin and the 8th pin of the eighth integrated circuit U8 respectively; the 1st pin and the 2nd pin of the sixth integrated circuit U6 are connected to the 11th pin and the 5th pin of the eighth integrated circuit U8 respectively; the 9th pin and the 12th pin of the sixth integrated circuit U6 are connected to the 6th pin of the fourth integrated circuit U4; the 4th pin and the 8th pin of the sixth integrated circuit U6 are shorted, the 3rd pin and the 13th pin of the sixth integrated circuit U6 are shorted; the 10th pin of the sixth integrated circuit U6 is connected to the 14th pin and the 3rd pin of the seventh integrated circuit U7; the 11th pin of the sixth integrated circuit U6 is connected to the 11th pin and the 5th pin of the seventh integrated circuit U7; The 15th pin and the 2nd pin of the seventh integrated circuit U7 are shorted to the 15th pin and the 8th pin of the second connector J2 and the 15th pin and the 8th pin of the third connector J3; the 12th pin and the 4th pin of the seventh integrated circuit U7 are shorted to the 14th pin and the 7th pin of the second connector J2 and the 14th pin and the 7th pin of the third connector J3.

4. The startup power supply device according to claim 1, wherein The driving protection unit (5) comprises: The first capacitor C1 is connected between the 14th pin of the third integrated circuit U3 and the signal ground, and the 14th pin of the third integrated circuit U3 is shorted to the 4th pin of the first integrated circuit U1; the first resistor R1 is connected between the 4th pin of the first integrated circuit U1 and +15V; the 3rd pin of the first integrated circuit U1 is shorted to the signal ground; the third resistor R3 is connected between the 1st pin of the first integrated circuit U1 and the 2nd pin of the first integrated circuit U1; the fourth resistor R4 is connected between the 1st pin of the first integrated circuit U1 and the 4th pin of the second integrated circuit U2; the 2nd pin of the first integrated circuit U1 and the 8th pin of the second integrated circuit U2 are shorted; The second resistor R2 is connected between the 13th pin of the second integrated circuit U2 and the 2nd pin of the third integrated circuit U3; the 1st pin of the third integrated circuit U3 is connected to +15V, the 8th pin of the third integrated circuit U3 is connected to the signal ground, and the second capacitor C2 is connected between +15V and the signal ground; The 14th pin of the second integrated circuit U2 is shorted to +15V; the fifth resistor R5 is connected in series with the second diode D2 and then connected between the 1st pin of the second integrated circuit U2 and the 1st pin of the first connector J1; the first diode D1 is connected between the 1st pin of the second integrated circuit U2 and the 6th pin of the second integrated circuit U2; the sixth resistor R6 is connected between the 5th pin of the second integrated circuit U2 and the 2nd pin of the first connector J1; the third diode D3 and the fourth diode D4 are connected in series and then connected between the 2nd pin and the 4th pin of the first connector J1; the seventh resistor R7 is connected between the 2nd pin and the 4th pin of the first connector J1; the fourth capacitor C4 and the sixth capacitor C6 are connected in parallel, and the fifth capacitor C5 and the seventh capacitor C7 are connected in parallel, and then the two parallel connections are connected between the 4th pin of the second integrated circuit U2 and the 6th pin of the second integrated circuit U2; the third capacitor C3 is connected between the 4th pin of the second integrated circuit U2 and the 2nd pin of the second integrated circuit U2; and the 4th pin of the second integrated circuit U2 is connected to +15V.

5. The on-board high power secondary power supply powered device for starting a power generation power supply system of claim 1, wherein, Further comprising: a soft start unit (8) connected with the output end of the input filter unit (1) and the input end of the input rectifier unit (2) respectively; the soft start unit (8) is also connected with the auxiliary power supply unit (7).

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