Variable-frequency series resonance test method based on FPGA (field programmable gate array)

Abstract

The invention provides a variable-frequency series resonance test method based on an FPGA (field programmable gate array). The method comprises the following steps: collecting voltage signals and current signals of a three-phase power supply; conditioning the voltage signals and the current signals with a VHS-ADC (video home system-analog to digital converter) platform; carrying out the SVPWM (space vector pulse width modulation) according to the digital voltage signals and the digital current signals obtained through the conditioning and sine wave and cosine wave so as to obtain the SVPWM modulation signal; establishing a VHS-ADC control system based on an FPGA chip for realizing the SVPWM manner; generating SVPWM pulse signals from the SVPWM modulation signals with the VHS-ADC control system; and carrying out the series resonance test according to the SVPWM pulse signals. According to the technology disclosed by the invention, the power factor of a power supply on the alternating-current (AC) input side of the variable-frequency series resonance test device is increased, and the fluctuation of the output direct-current (DC) voltage is reduced, so that the voltage waveform on the output side of the variable-frequency power supply becomes the sinusoidal waveform with good smoothness, and the utilization rate of the power supply is increased; and due to the VHS-ADC control model established based on the FPGA, the development for the control system part is short in cycle, low in debugging workload and fast in processing speed.

Description

technical field [0001] The invention relates to a frequency conversion series resonance test technology, in particular to an FPGA-based frequency conversion series resonance test method. Background technique [0002] In some research and industrial application fields, it is necessary to judge the insulation strength of electrical equipment through the AC withstand voltage test, which can test the insulation strength of electrical equipment to withstand the effect of long-term power frequency voltage and the ability of power frequency voltage to rise. Then decide whether the electrical equipment can leave the factory or whether it can be put into operation. Therefore, in the factory test, handover test and insulation preventive test of general electrical equipment, AC withstand voltage test is required. [0003] Some electrical equipment, such as transmission lines, power cables, large generators, GIS combined electrical appliances and other large-capacity tested products, r...

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Problems solved by technology

[0005] Based on this, it is necessary to provide a FPGA-based frequency conversion series resonance test method for the problems of large program debugging workload and poor smoothness of the AC output voltage waveform existing in the traditional series resonance test technology.

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