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FPGA-based converter closed-loop controller

A converter and controller technology, applied in control/regulation systems, converting DC power input to DC power output, and AC power input converting to AC power output, etc. Consistency and stability requirements are strict, three-phase cannot be independently adjusted, etc., to achieve the effect of ensuring the output voltage or current

Active Publication Date: 2017-12-08
西安翌飞核能装备股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It can be seen that this scheme is an open-loop controller, and the three phases cannot be adjusted independently
The controller also has certain limitations in application, and has strict requirements on the consistency and stability of the three-phase load
When the load of the converter changes, the output voltage and current change, and the adaptability of the converter load is poor

Method used

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  • FPGA-based converter closed-loop controller
  • FPGA-based converter closed-loop controller

Examples

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Embodiment Construction

[0030] The working process of the FPGA-based converter closed-loop controller is as follows: First, read the given signal stored in the FPGA chip as the given signal of the closed-loop controller, and at the same time read the analog signal in the power topology sampled by the off-chip AD (feedback signal), and perform conversion and protection, the feedback signal includes output voltage signal, output current signal and inductor current signal. Adjust the structure of the closed-loop controller according to the actual application needs, and select the appropriate signal as the feedback signal of the closed-loop controller; The modulated signal and the independently working carrier generation are sent to the PWM wave generation module, so far the PWM wave signal required by the converter is obtained, and the complementary PWM wave signal is obtained through the internal NOT gate (the drive signal of the bridge arm of the converter ), the PWM wave signal is sent to the dead ti...

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Abstract

The invention provides an FPGA-based converter closed-loop controller. Based on the characteristics of high-speed processing capability, parallel execution, flexible programming and the like of the FPGA, closed-loop control of the converter is realized; the FPGA adopts a given signal configured in the interior for the closed-loop controller; then, an off-chip AD chip is adopted for high-frequency sampling conversion to be used as a feedback signal and protection judgment for the closed-loop controller; and next, a modulation signal of the converter is calculated and updated in real time, so that constant output voltage or current of the converter can be ensured no matter how a three-phase load capacity changes. The FPGA-based converter closed-loop controller has the advantages of high integration degree, low cost, flexible control algorithm and the like.

Description

technical field [0001] The invention belongs to the field of closed-loop controllers of semiconductor converters, in particular to an FPGA-based closed-loop controller of converters. Background technique [0002] At present, digital controllers are widely used in the semiconductor converter industry, and DSP-based converter closed-loop controllers have become mainstream applications. However, the closed-loop controller of the converter based on DSP is based on the calculation of the closed-loop control of the interruption, and the interruption frequency is at most twice the switching frequency of the converter, that is, the closed-loop controller of the converter within a switching cycle of the semiconductor device of the converter Only two closed-loop control calculations are performed; and the system clock frequency is low and the program is executed serially, which makes it time-consuming to execute the closed-loop controller calculation each time it enters an interrupt. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M1/00H02M5/00H02M3/00
CPCH02M1/00H02M3/00H02M5/00H02M1/0012
Inventor 金岩
Owner 西安翌飞核能装备股份有限公司
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