Frequency converter controller

Abstract

The invention discloses a frequency converter controller comprising the following parts of an SDRAM for buffering input signals and / or output signals; and an MCU connected to the SDRAM for processingthe input signals and / or output signals, wherein the MCU comprises a first floating point DSP and a second floating point DSP for algorithmically controlling the input signals and / or output signals; and a first CLA and a second CLA for logically controlling the input signals and / or output signals. It can be seen that by embedding two floating point DSPs and two CLAs in the MCU of the frequency inverter controller, the processing speed of the input signals and / or output signals of the controller can be greatly improved, and the buffering of the input signals and / or output signals by the SDRAM greatly improves the controller's throughput of interactive data, thereby solving the problems of slow data processing speed and low throughput during the data interaction process of the frequency inverter controller in the prior art.

Description

technical field [0001] The invention relates to the technical field of power electronics, in particular to a frequency converter controller. Background technique [0002] Inverter (Variable-frequency Drive, VFD) is a power control device that uses frequency conversion technology and microelectronics technology to control AC motors by changing the efficiency of the motor's working power supply. Among them, the controller is the most critical core component in the inverter. At present, there are mainly three control methods for frequency converters. The first is the fixed-point DSP+FPGA architecture. This architecture needs to write a large number of FPGA logic control and interface software. The communication data flow is more complicated and requires a higher cost. Labor costs; the second is the fixed-point DSP+floating-point DSP+PLC architecture. Although this architecture has high control precision and strong stability, the implementation process of data interaction in th...

AI Technical Summary

Problems solved by technology

At present, there are mainly three control methods for frequency converters. The first is the fixed-point DSP+FPGA architecture. This architecture needs to write a large number of FPGA logic control and interface software. The communication data flow is more complicated and requires a higher cost. Labor costs; the second is the fixed-point DSP+floating-point DSP+PLC architecture. Although this architecture has high control precision and strong stability, the implementation process of data interaction in this architecture is relatively cumbersome and has poor reusability; The three are custom-made MCU architectures, but custom-made architectures require high investment costs, which cannot be afforded by ordinary companies

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