Converter real time controller

Abstract

A real time controller of inverter is prepared for connecting fixed-point CPU, the first floating-point CPU, the second floating-point CPU, power supply unit and clock generating unit separately to programmable logic unit, carrying out access and dispatch on the first and the second floating-point CUP by fixed-point CPU through master-slave mode special high speed parallel host port bus, providing data isolation and data driving for access of fixed-point CPU to two floating-point CPU by buffer unit in order to set data buffer unit for writing and reading necessary data in two said floating-point CPU.

Description

Technical field [0001] The present invention mainly relates to the field of converter control, and specifically refers to a real-time controller of the converter. Background technique [0002] The real-time controller for traction converter is one of the most critical links of converter control, which determines the quality of converter output, and the stability and reliability of converter control. Now, there are various solutions in the field of real-time controllers at home and abroad, so real-time controllers also have different hardware architectures accordingly. At present, foreign countries usually adopt a multi-floating-point CPU+FPGA architecture. Although the controller of this architecture has been put into commercial use and has entered the mass production stage, the development cycle is too long and needs to be based on the requirements of the controller. Write a lot of logic control software, which brings huge labor costs. In addition, in different control occasions...

AI Technical Summary

Problems solved by technology

At present, foreign countries usually adopt the architecture of multi-floating-point CPU+FPGA. Although the controller of this architecture has been put into commercial use and entered the mass production stage, the development cycle is too long, and it needs to be based on the requirements of the controller. Write a large amount of logic control software, which brings huge labor cost overhead

In addition, in different control occasions, it is troublesome for the system to perform cropping changes

see Figure 4 As shown, the current mainstream converter controller in China adopts the architecture of single floating-point CPU + 2 fixed-point CPUs. This system is relatively stable and reliable. However, the way of exchanging data between CPUs uses a dual-port access storage unit. (hereinafter referred to as dual-port RAM) asynchronously exchange data, so the delay in data transmission is longer, making the entire calculation cycle longer; in addition, using dual-port RAM for access, the probability of data exchange conflicts is high, so , Summing up the long-term application experience, we believe that it is necessary to develop a new real-time controller architecture to improve and supplement the above-mentioned control architecture problems

Images