CN205787749U

CN205787749U - A kind of control circuit based on FPGA

Info

Publication number: CN205787749U
Application number: CN201620506543.5U
Authority: CN
Inventors: 江明; 沈宗明; 陈小明; 陈亚新; 田震; 王元; 王宗跃
Original assignee: Anhui Polytechnic University
Current assignee: Anhui Polytechnic University
Priority date: 2016-05-30
Filing date: 2016-05-30
Publication date: 2016-12-07
Anticipated expiration: 2026-05-30

Abstract

This utility model discloses a kind of control circuit based on FPGA, including voltage acquisition module, A/D change-over circuit, FPGA control module and DC/DC module, described voltage acquisition module is connected with A/D change-over circuit, described A/D change-over circuit is connected with FPGA control module, described FPGA control module is connected with DC/DC module, and reference voltage is input to the input of FPGA control module.This utility model simple in construction, it is possible to automatically control stablizing of voltage, it is ensured that the input voltage of load will not fluctuate excessive, uses digital control simultaneously, overcomes the defect in analog circuit control and interference.

Description

A kind of control circuit based on FPGA

Technical field

A kind of field of circuit control of this utility model design, particularly to a kind of simplification, based on FPGA Voltage control circuit.

Background technology

Power electronic devices experienced by power frequency, low frequency, the development course of intermediate frequency to high frequency, corresponding to this, electric power The control of electronic circuit is also from initially with phase controlling as means, and the control circuit being made up of discrete component is sent out Exhibition is to integral control circuit, then the computer aiming at HF switch by now controls, and towards higher frequency The direction of rate, more low-loss and total digitalization is developed.Analog control circuit exists that control accuracy is low, dynamically rings Should slowly, parameter tuning inconvenient, temperature drift seriously, the shortcoming such as the most aging.

Replace simulation to control by Digital Control, the conventional simulation actuators such as temperature drift can be eliminated and be difficult to gram The shortcoming of clothes, beneficially parameter tuning and variable parameter control, by the change of software program, it is conveniently adjusted control Scheme processed and realize various new control strategy, can reduce the number of components and parts simultaneously, simplify hardware configuration, Thus improve the reliability of system.In the prior art, some fields need to export stable magnitude of voltage to negative Carrying, and normal power supplies is along with the extraneous factor such as discharge time, interference, voltage can be along with change, and one can Being automatically adjusted voltage, the control circuit of simple in construction is more and more important.

Utility model content

The purpose of this utility model is to provide a kind of control circuit based on FPGA, and this circuit structure is simple, The voltage in load circuit can be automatically adjusted, it is ensured that load input terminal voltage input is stable.

In order to achieve the above object, this utility model includes voltage acquisition module, A/D change-over circuit, FPGA Control module and DC/DC module, described voltage acquisition module is connected with A/D change-over circuit, described A/D change-over circuit is connected with FPGA control module, and described FPGA control module is with DC/DC module even Connecing, reference voltage is input to the input of FPGA control module.

Described FPGA control module includes fpga chip, numeral pi controller, digital pulse-width modulator, institute Voltage data is transferred to fpga chip by the A/D change-over circuit stated, and reference voltage is transferred to fpga chip, The outfan of described FPGA is connected with digital PI controller, described digital PI controller and digital pulse width Manipulator connects, and described digital pulse-width modulator output pwm signal is to DC/DC module.

The model of described A/D change-over circuit is TLC5510.

Described DC/DC module includes the DC/DC controller with boosting and buck functionality.

This utility model simple in construction, it is possible to automatically control stablizing of voltage, it is ensured that the input voltage of load is not Can fluctuate excessive, use digital control simultaneously, overcome the defect in analog circuit control and interference.

Accompanying drawing explanation

Fig. 1 is control circuit structural representation described in the utility model.

Fig. 2 is a kind of A/D modular converter chip periphery circuit diagram described in the utility model.

Reference in figure is respectively as follows: 1. voltage acquisition modules；2.A/D change-over circuit；3.FPGA chip；4. number Word PI controller；5. digital pulse-width modulator；6.DC/DC module.

Detailed description of the invention

Below in conjunction with the accompanying drawings this utility model is further described.

This utility model includes voltage acquisition module 1, A/D change-over circuit 2, FPGA control module and DC/DC Module 6, voltage acquisition module 1 is connected with A/D change-over circuit 2, and A/D change-over circuit 2 is controlled with FPGA Molding block connects, and FPGA control module is connected with DC/DC module 6, and reference voltage is input to FPGA The input of control module.FPGA control module includes fpga chip 3, digital PI controller 4, numeral Pulse width modulator 5, voltage data is transferred to fpga chip 3 by A/D change-over circuit 2, and reference voltage passes Being handed to fpga chip 3, the outfan of FPGA is connected with digital PI controller 4, digital PI controller 4 Being connected with digital pulse-width modulator 5, digital pulse-width modulator 5 output pwm signal is to DC/DC module 6. Use the structure of Voltage loop, gather voltage with voltage acquisition module, the number that will be gathered by A/D change-over circuit According to being sent to fpga chip 3 after digitized, fpga chip 3 input reference voltage, fpga chip simultaneously 3 process after output gather the difference signal of voltage and reference voltage to digital PI controller 4, numeral PI Controller 4 exports to digital pulse modulator 5, and digital pulse modulator 5 sends pwm signal to DC/DC Module 6, DC/DC module 6 can accept pwm signal and control voltage.The function that FPGA is completed needs The program wanted is existing well-known routines, will not be discussed further here.

The model of A/D change-over circuit 2 is TLC5510.Be as described in Figure 2 TLC5510 peripheral circuit and The I/O pin of FPGA connects figure.A/D conversion chip TLC5510, this chip not only same in high-speed transitions Time can keep relatively low power consumption and there is high-speed a/d translation function, also with internal sample holding circuit, Thus enormously simplify the design of peripheral circuit；A/D conversion regime, the method is fastest, can Additional samples-holding circuit, takes the method that hierarchical parallel is changed, is subtracted each other with analog voltage by input voltage, The difference obtained carries out parallel A/D conversion again, greatly reduces component number.

DC/DC module 6 includes the DC/DC controller with boosting and buck functionality.DC/DC controller Can complete the voltage pulsation of different situations, can boost can also blood pressure lowering, it is ensured that stablizing of circuit.Such as type The function of boosting and blood pressure lowering number is can be achieved with for the DC/DC controller of LTC3852.

Above in conjunction with accompanying drawing, the present invention is exemplarily described, it is clear that this utility model implements not Limited by aforesaid way, as long as have employed changing of the various unsubstantialities that technical solutions of the utility model carry out Enter, or the most improved design by the present invention and technical scheme directly apply to other occasion, all in this reality Within novel protection domain.

Claims

1. a control circuit based on FPGA, it is characterised in that: include voltage acquisition module, A/D change-over circuit, FPGA control module and DC/DC module, described voltage acquisition module is connected with A/D change-over circuit, Described A/D change-over circuit is connected with FPGA control module, described FPGA control module and DC/DC Module connects, and reference voltage is input to the input of FPGA control module.

A kind of control circuit based on FPGA, it is characterised in that: described FPGA Control module includes that fpga chip, digital PI controller, digital pulse-width modulator, described A/D turn Changing circuit and voltage data is transferred to fpga chip, reference voltage is transferred to fpga chip, described The outfan of FPGA is connected with digital PI controller, described digital PI controller and digital pulse width modulation Device connects, and described digital pulse-width modulator output pwm signal is to DC/DC module.

A kind of control circuit based on FPGA, it is characterised in that: described A/D The model of change-over circuit is TLC5510.

A kind of control circuit based on FPGA, it is characterised in that: described DC/DC Module includes the DC/DC controller with boosting and buck functionality.