FPGA-based SPWM variable-frequency speed control system and control method thereof
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A technology of frequency conversion speed regulation and control method, which is applied in the direction of control system, AC motor control, output power conversion device, etc., can solve problems such as low safety, and achieve the effect of high integration and control performance
Inactive Publication Date: 2019-11-19
GUANGDONG VOCATIONAL & TECHNICAL COLLEGE
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[0005] The present invention overcomes the deficiencies of the above-mentioned prior art, and provides a SPWM frequency conversion speed regulation system based on FPGA. This device sets various The detection circuit and the protection circuit have effectively improved the security and reliability of the system, and solved the technical problem of low security in the prior art; this method provides a control method for a SPWM frequency conversion speed regulation system based on FPGA, and is used in conjunction with After the device is matched, the SPWM frequency conversion speed regulation system is more perfect
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specific Embodiment approach 1
[0072] An FPGA-based SPWM variable frequency speed regulation system, such as figure 1 As shown, it includes an inverter main circuit, an ARM control circuit, a SPWM waveform generation module and a drive circuit. One end of the inverter main circuit is connected to a 380V external power supply, and the other end of the inverter main circuit is connected to the electrical equipment to be called. The motor M is connected, the main circuit of the inverter is connected to the I / O interface of the ARM control circuit through a set of current-limiting starting circuits, and the main circuit of the inverter is respectively connected to the overvoltage and undervoltage detection circuit through a set of voltage detection circuits. It is connected with the A / D conversion interface of the ARM control circuit, the overvoltage and undervoltage detection circuit is connected with the ARM control circuit, the inverter main circuit is connected with the ARM control circuit through a set of o...
specific Embodiment approach 2
[0125] According to the control method implemented by the FPGA-based SPWM variable frequency speed regulation system described in the specific embodiment 1, such as Figure 13 shown, including the following steps:
[0126] Step a, start, system initialization;
[0127] Step b, parameter setting;
[0128] Step c, determine whether the parameters are completed, if so, go to step d, if not, return to step b;
[0129] Step d, adjust button module and display subroutine;
[0130] Step e, determine whether to boot, if yes, go to step f, if not, return to step d;
[0131] Step f, the startup is interrupted;
[0132] Step g, start the button subroutine;
[0133] Step h, start the display subroutine, and return to step g.
[0134] The main program should complete the initialization of the system and the setting of corresponding parameters. In the initialization program, in addition to completing the ARM interrupt source (timer and external interrupt) and the initialization of th...
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Abstract
An FPGA-based SPWM variable-frequency speed control system and a control method thereof belong to the technical field of variable-frequency control. A system in the prior art has low security. The FPGA-based SPWM variable-frequency speed control system comprises an inverter main circuit connected with an electric device to be called, wherein the inverter main circuit is connected with an ARM control circuit through a current-limiting starting circuit; the inverter main circuit is connected to an overvoltage and undervoltage detection circuit and the ARM control circuit through a voltage detection circuit; the overvoltage and undervoltage detection circuit is connected with the ARM control circuit; the inverter main circuit is connected with the ARM control circuit through an overtemperature protection circuit; the ARM control circuit is connected to a driving circuit through a SPWM waveform generating module; the inverter main circuit and the electric device to be called are connectedwith the overcurrent protection circuit and the ARM control circuit through the current detection circuit respectively; the overcurrent protection circuit is connected with the ARM control circuit; and the ARM control circuit and the inverter main circuit are connected to achieve pump rise limit control. The FPGA-based SPWM variable-frequency speed control system is improved in safety and reliability. The SPWM variable-frequency speed control system is further improved in cooperation with the method.
Description
technical field [0001] The invention relates to the technical field of frequency conversion regulation, in particular to an FPGA-based SPWM frequency conversion speed regulation system and a control method thereof. Background technique [0002] In the past 10 years, electric drive technology is facing a historical revolution, that is, the replacement of DC speed regulation by AC speed regulation and the replacement of analog control technology by computer digital control technology have become the development trend. AC variable frequency speed regulation technology is a main means to save electricity, improve process flow to improve product quality and environment, and promote technological progress. It is recognized as the most promising speed control method at home and abroad with its excellent speed regulation and braking performance, high efficiency, high power factor, speed regulation accuracy and energy saving effect, wide application range and many other advantages. ...
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