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

A signal analysis and electrical steel technology, applied in the direction of material magnetic variables, etc., can solve problems such as inability to respond in real time, achieve the effect of sinusoidal waveform and ensure real-time response

CN103728366BActive Publication Date: 2016-03-30NAT INST OF METROLOGY CHINA
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Publication Date
2016-03-30

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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.
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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...

Examples

Embodiment Construction

[0045] The principles and features of the present invention are described below in conjunction with the accompanying drawings, and the examples given are only used to explain the present invention, and are not intended to limit the scope of the present invention.

[0046]This embodiment provides a signal analysis device 1 for continuous iron loss measurement of electrical steel, which is used in conjunction with the signal synchronization control unit 2, measurement wire frame 3 and power amplifier unit 4 commonly used in electrical steel connection iron loss measurement devices , is an important part of the electrical steel connection iron loss measurement device, mainly used to analyze the secondary voltage signal and primary current signal in the continuous iron loss measurement of electrical steel, and the voltage effective value and voltage average generated during the analysis process Parameters such as value, current RMS value, current peak value, H signal and power are ...