A signal analysis device and method for continuous iron loss measurement of electrical steel

Abstract

The invention relates to a signal analysis device for silicon steel continuous iron loss measurement and a signal analysis method thereof. The signal analysis device comprises a multi-path analog-to-digital converter for converting the secondary voltage signal and the primary current signal into digital quantity; an FPGA for calculating the digital quantity of the secondary voltage signal and the primary current signal in real time; a micro-controller for reading and processing the secondary voltage signal, the primary current signal and the silicon steel signal calculated by the FPGA in real time; a multi-path digital-to-analog converter for converting the signal coming from the micro-controller into the analog quantity for output; a secondary voltage sine feedback circuit for measuring the phases of the secondary voltage signal and the power frequency sine signal, carrying out phase shafting on the secondary voltage signal to obtain the signal with the same phase with the power frequency sine signal, amplifying the waveform difference between the power frequency sine signal and the phase-shifted secondary voltage signal, superimposing the waveform difference signal on the powder frequency sine signal, and outputting the superimposed signal. The performance of the silicon steel is reflected in real time, and simultaneously the secondary voltage waveform sine is ensured.

Description

technical field [0001] The invention relates to the technical field of electrical steel, in particular to a signal analysis device and method for continuous iron loss measurement of electrical steel (silicon steel sheet). Background technique [0002] At present, two methods are used in the world to measure electrical steel loss—the Epstein square circle method and the SST single-chip measurement method. These two methods are specified in the IEC60404-2 and IEC60404-3 standards respectively. Composed of voltmeter, ammeter and power meter, the signal source is a sine wave generator, and the secondary voltage waveform is kept sinusoidal by using the secondary voltage waveform analog feedback. [0003] Since the above method is a static measurement, the real-time requirements for the voltmeter, ammeter and power meter are not high. During the measurement process, the material is fixed, and the measurement result can be a response of several hundred milliseconds. When it is appl...

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is to provide a signal analysis device and method for continuous iron loss measurement of electrical steel, which is used to solve the problems existing in the existing electrical steel loss measurement that cannot respond in real time and ensure that the secondary voltage waveform is sinusoidal.

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