Automatic measuring system for iron loss of magnetic material

An automatic measurement, magnetic material technology, applied in the direction of magnetic properties measurement, material magnetic variables, measurement devices, etc., can solve the problems of low efficiency, no automatic measurement, not suitable for long-term operation, etc., to achieve real-time accurate and efficient measurement. high effect

Active Publication Date: 2012-06-06
WUHAN NEW ENERGY INST OF ACCESS EQUIP & TECH
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Problems solved by technology

[0003] Since there is no instrument on the market to measure core loss under PWM power supply, researchers usually build a temporary measurement platform for experiments. This temporary measurement platform does not have the function of automatic measurement, the efficiency is not high, and it is not suitable for long-term operation

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  • Automatic measuring system for iron loss of magnetic material
  • Automatic measuring system for iron loss of magnetic material
  • Automatic measuring system for iron loss of magnetic material

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Embodiment Construction

[0013] Embodiments of the present invention will now be described with reference to the drawings, in which like reference numerals represent like elements. As mentioned above, the present invention provides an automatic measurement system for iron loss of magnetic materials, which can automatically and accurately measure the PWM iron loss curve of magnetic materials, such as silicon steel, with high measurement efficiency and stable system operation.

[0014] The technical solutions of the embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. Such as figure 1 As shown, the automatic measurement system for iron loss of magnetic materials in this embodiment includes a power supply circuit 1 , a magnetic circuit 2 , and a measurement and control device 3 . The power circuit 1 includes a voltage regulating module 11 , a rectifying and filtering module 12 and a PWM inverter module 13 which are electrically connected i...

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Abstract

The invention discloses an automatic measuring system for iron loss of a magnetic material, which comprises a power circuit, a magnetic circuit and a measuring and control device, wherein the power circuit comprises a voltage regulating module, a rectifying filtering module and a PWM (Pulse Width Modulation) inverter module which are sequentially connected; the magnetic circuit comprises an Epstein square ring and a sample to be measured; the sample to be measured is arranged in the Epstein square ring; the measuring and control device comprises a computer processing module, a D / A conversion card, an A / D conversion card and a sampling module which is used for measuring the primary current and the secondary induced electromotive force of the Epstein square ring; the D / A conversion card is used for converting an input signal of the computer processing module into a modulating wave of the PWM inverter module; and the A / D conversion card is used for transmitting current and voltage signals collected by the sampling module to the computer processing module. By using the measuring system, a PWM iron loss curve of the magnetic material can be automatically and accurately measured with high measuring efficiency; and the system is stably operated.

Description

technical field [0001] The invention relates to the field of magnetic material measurement, in particular to an automatic measurement system for magnetic material iron loss. Background technique [0002] In the electrical industry, with the development of power electronic devices and the continuous improvement of power supply strategies, PWM (Pulse Width Modulation, pulse width modulation) technology has gradually replaced traditional power supply methods and is more and more widely used in variable frequency drive applications. In this new working mode with pulse sequence as the excitation source, in addition to the fundamental wave, the output voltage spectrum of the inverter also contains a large number of switching sub-frequency harmonics. Compared with the previous sinusoidal excitation, the power supply method has undergone fundamental changes, but designers still use the traditional design method when designing and analyzing the performance of the motor. For example,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N27/82G01R33/12G01R27/26
Inventor 王东马伟明陈俊全余锡文郭云珺
Owner WUHAN NEW ENERGY INST OF ACCESS EQUIP & TECH
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