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Digital control system and method of DC-DC power supply

A digital control system, DC-DC technology, applied in the direction of control/regulation system, electrical components, adjusting electrical variables, etc., can solve the problems of high stability and accuracy of circuit components parameter values, difficult to use, etc., to achieve The effect of short dynamic adjustment time, small impact and high stability

Active Publication Date: 2020-05-22
SHENZHEN VAPEL POWER SUPPLY TECH
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this algorithm has high requirements for the stability and accuracy of the parameter values ​​of the circuit components, and it is not easy to use when the parameters of the circuit components are unstable.

Method used

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  • Digital control system and method of DC-DC power supply
  • Digital control system and method of DC-DC power supply
  • Digital control system and method of DC-DC power supply

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Embodiment Construction

[0039] The present invention will be further described below in conjunction with the accompanying drawings and embodiments:

[0040] like figure 1 As shown, an embodiment of the present invention provides a digital control system for a DC-DC power supply, including:

[0041] The sampling module 1 samples the output voltage and output current of the output terminal of the power supply, and then obtains the output voltage sampling signal Vout and the output current sampling signal Iout through analog-to-digital conversion.

[0042] The PID control module 2 inputs the output voltage sampling signal Vout into the first comparator 21 as a voltage feedback signal, compares it with the voltage regulation reference voltage value Vref to obtain a voltage error signal, and then inputs the voltage error signal to the voltage PID controller 22 Calculation is performed in , to obtain the voltage loop control value Vpid, the output current sampling signal Iout is input into the third compa...

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Abstract

The invention discloses a digital control system and method for a DC-DC power supply, and the system comprises: a sampling module which carries out the sampling of an output voltage and an output current, and obtains an output voltage sampling signal and an output current sampling signal; a PID control module which obtains a loop control quantity through the output voltage sampling signal and theoutput current sampling signal, and inputs the loop control quantity into a loop selector to obtain a PID loop control quantity; a dynamic detection module which is used for obtaining a current load state by outputting a current sampling signal and obtaining a current load dynamic frequency by switching time among different load states; a dynamic control module which is used for adjusting the PWMduty ratio signal; and a PWM module which is used for converting the adjusted PWM duty ratio signal into a PWM wave. According to the invention, the dynamic adjustment time is short, the influence onthe loop performance of the system is small, the response speed in the low-frequency load dynamic state is increased, and meanwhile the system can be kept to have high stability in the high-frequencyload dynamic state.

Description

technical field [0001] The invention relates to the technical field of power electronics, in particular to a digital control system and method of a DC-DC power supply. Background technique [0002] With the continuous development of technology, the power supply for various electronic devices is becoming more and more important, and the performance of the power supply will even directly affect the performance indicators and work stability of the entire set of electronic devices. Among them, digitally controlled switching power supply has become an important part of mainstream electronic equipment power supply applications due to its advantages of strong flexibility, good stability, easy quantitative control and high precision. [0003] For example, in the application of laser equipment power supply, when the laser equipment is working, it is equivalent to the switching of the load of the laser power supply at high frequency, and the dynamic frequency of the load is from 1 to ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M3/335
CPCH02M3/33515H02M1/0012H02M1/0009Y02B70/10
Inventor 陈开强吕志明
Owner SHENZHEN VAPEL POWER SUPPLY TECH
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