CN-121984355-A - Parameter setting method of RCC converter based on graphic method

CN121984355ACN 121984355 ACN121984355 ACN 121984355ACN-121984355-A

Abstract

The invention discloses a parameter setting method of an RCC converter based on a graphic method, which comprises the steps of constructing a relation of current i Dz -voltage U Dz of a zener diode D Z , inputting parameter values of devices except for parameters to be set of the RCC converter into the relation of current i Dz -voltage U Dz of the zener diode D Z obtained in the step one, obtaining a relation curve of voltage U Dz -current i Dz of the zener diode D Z under different parameters to be set, constructing a relation of current i Dz -voltage U Dz of the zener diode D Z , so that an accurate fitting function expression relation between an output voltage and the parameters of the RCC converter to be set can be obtained under a set parameter, and under the condition of definite RCC output requirement constraint, the method can be used for guiding the setting of parameters such as a triode, a zener diode, a power transformer and all resistance container parts in the RCC converter, and solving the technical problem that the output voltage and the quantitative output voltage relation of the current RCC converter cannot be obtained by an accurate model between the output voltage and each parameter.

Inventors

ZHAO PU
SU QIAN
ZHAO HENGFEI
LUO DAN
CHEN WEIWEI
WANG LEI

Assignees

西安空间无线电技术研究所

Dates

Publication Date: 20260505
Application Date: 20251231

Claims (1)

1. The parameter setting method of the RCC converter based on the graphic method comprises an inductor L f , a capacitor C1, a capacitor C2, a capacitor Cc, a capacitor Cb, a capacitor Co, a resistor R1, a resistor Rb, a resistor Rc, a resistor Ro, a voltage stabilizing diode Dz, a diode D2, a diode Do, a triode Q5 and a transformer T, and is used for setting parameters of the capacitor Cc, the capacitor Cb, the resistor R1, the resistor Rb, the resistor Rc, the diode D2, the diode Do, the triode Q5 and the transformer T, and is characterized by comprising the following steps: Step one, constructing a relation between a current i Dz and a voltage U Dz of a zener diode D Z ; Wherein: U in is the input voltage of the RCC converter, V; U o is the output voltage of the desired RCC converter, V; U do is the voltage drop, V, of the diode Do on the secondary side; U D2 is the voltage drop, V, of diode D2 on the primary side; U bes is the base-emitter voltage of triode Q5, V; U vcc is the lowest supply voltage of the output load, V; n p is the number of turns of the primary winding of the transformer T and turns; n s is the number of turns of the secondary winding of the transformer T, and the turns; n b is the number of turns of the auxiliary winding of the transformer T, and the turns; l p is the equivalent inductance of the primary winding of the transformer T, H; I o is output current, A; Is the amplification factor of the triode Q5; r 1 is the resistance value of the resistor R1, omega; r b is the resistance value of a resistor Rb, omega; c b is the capacitance value of the capacitor Cb, F; conversion efficiency for the RCC converter; Inputting parameter values of devices except for parameters to be set of the RCC converter into a relation between the current i Dz and the voltage U Dz of the zener diode D Z obtained in the step one, and obtaining a relation curve between the voltage U Dz and the current i Dz of the zener diode D Z under different parameters to be set; Step three, finding out the intersection point of the relation curve of the voltage U Dz -current i Dz of the zener diode D Z obtained in the step two and the volt-ampere characteristic curve of the zener diode D Z , wherein the intersection point is the actual working point of the RCC converter; Substituting the actual working point of the RCC converter into the following formula to obtain a curve relationship between the output voltage Uo and the parameter to be set; 。

Description

Parameter setting method of RCC converter based on graphic method Technical Field The invention belongs to the field of aerospace system space vehicle energy, relates to an RCC converter quantization circuit, and particularly relates to a parameter setting method of an RCC converter based on a graphic method. Background With the accelerated growth of the global commercial aerospace industry, chinese commercial aerospace products are also coming into a rapidly developing transition and upgrading stage. The load function of the commercial space satellite is more and more complex, the satellite system needs to integrate more loads and equipment, the commercial satellite depends on a solar cell array as a main energy source, and the energy source acquired in space is limited, so that the DC/DC secondary power source is required to be continuously developed towards the directions of more miniaturization, higher integration and higher efficiency so as to provide more powerful support in a limited satellite space and energy system; the RCC converter circuit has simple structure, little number of devices and low cost, does not depend on a special control chip, and can realize closed-loop control of output voltage only through the devices such as a resistor and a capacitor, a triode and the like. The application of the converter meets the requirements of commercial aerospace on the miniaturization and low cost of the DC/DC power supply, and provides important auxiliary power supply functions for a plurality of aerospace DC/DC secondary power supply modules. The RCC converter has a remarkable characteristic that the output voltage is determined by the common coupling of parameters of a primary voltage stabilizing tube, a triode, a resistance-capacitance diode and a power transformer, and the monotonic relation characteristic of the output voltage and part of circuit parameters is only qualitatively given in the industry and the academia at present. Therefore, it is needed to provide a mathematical model of the quantization circuit of the RCC converter based on the graphical method, which can be used for guiding the precise parameter setting design of devices such as a transformer, a triode, a zener diode and the like in the RCC converter, and preventing the power failure of the RCC circuit. Disclosure of Invention Aiming at the defects existing in the prior art, the invention aims to provide a parameter setting method of an RCC converter based on a graphic method, so as to solve the technical problem that the relation between output voltage and circuit parameters cannot be obtained quantitatively in the traditional RCC converter. In order to solve the technical problems, the invention adopts the following technical scheme: A parameter setting method of an RCC converter based on a graphic method is based on the RCC converter, the RCC converter comprises an inductor L f, a capacitor C1, a capacitor C2, a capacitor Cc, a capacitor Cb, a capacitor Co, a resistor R1, a resistor Rb, a resistor Rc, a resistor Ro, a voltage stabilizing diode Dz, a diode D2, a diode Do, a triode Q5 and a transformer T, and the method is used for setting parameters of the capacitor Cc, the capacitor Cb, the resistor R1, the resistor Rb, the resistor Rc, the diode D2, the diode Do, the triode Q5 and the transformer T and comprises the following steps: Step one, constructing a relation between a current i Dz and a voltage U Dz of a zener diode D Z; Wherein: U in is the input voltage of the RCC converter, V; U o is the output voltage of the desired RCC converter, V; U do is the voltage drop, V, of the diode Do on the secondary side; U D2 is the voltage drop, V, of diode D2 on the primary side; U bes is the base-emitter voltage of triode Q5, V; U vcc is the lowest supply voltage of the output load, V; n p is the number of turns of the primary winding of the transformer T and turns; n s is the number of turns of the secondary winding of the transformer T, and the turns; n b is the number of turns of the auxiliary winding of the transformer T, and the turns; l p is the equivalent inductance of the primary winding of the transformer T, H; I o is output current, A; Is the amplification factor of the triode Q5; r 1 is the resistance value of the resistor R1, omega; r b is the resistance value of a resistor Rb, omega; c b is the capacitance value of the capacitor Cb, F; conversion efficiency for the RCC converter; Inputting parameter values of devices except for parameters to be set of the RCC converter into a relation between the current i Dz and the voltage U Dz of the zener diode D Z obtained in the step one, and obtaining a relation curve between the voltage U Dz and the current i Dz of the zener diode D Z under different parameters to be set; Step three, finding out the intersection point of the relation curve of the voltage U Dz -current i Dz of the zener diode D Z obtained in the step two and the volt-ampere characteristic curve of the zener diod