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Recommend of Magnetic Permeability Measurement Instrument for Silicon Steel Sheet
Release time:
2019-07-27
Source:
Www.fe2100.com
Permeability, English name: magneticpermeability, a physical quantity that characterizes the magnetism of magnetic media. Represents the resistance to magnetic flux or its ability to conduct magnetic lines of force in a magnetic field after a current flows through a coil in space or in the core space.
permeability, English name: magnetic permeability, a physical quantity that characterizes the magnetism of a magnetic medium. Represents the resistance to magnetic flux or its ability to conduct magnetic lines of force in a magnetic field after a current flows through a coil in space or in the core space. Its formula μ = B/H, where H = magnetic field strength, B = magnetic induction strength, commonly used symbol μ, μ is the magnetic conductivity of the medium, or absolute magnetic conductivity.
The measurement of magnetic permeability is an indirect measurement, measuring the inductance of the winding coil on the magnetic core, and then calculating the magnetic permeability of the magnetic core material by the formula. So,
permeabilityThe test instrument is the inductance tester. It is emphasized here that some simple inductance test instruments cannot be adjusted in test frequency and test voltage. For example, for some bridges, the test frequency is 100Hz or 1kHz, and the test voltage is 0.3V. The 0.3V given is not the voltage across the inductor, but the voltage generated by the signal generator. The voltage across the measured coil is an unknown. If the inductance is measured with an instrument, such as a FE-30SST silicon steel sheet iron loss tester, not only the test frequency is adjustable, but also the voltage and magnetizing current at both ends of the measured inductance coil are adjustable. Understanding these functions of the test instrument is of great help to the correct measurement of magnetic permeability.
silicon steel sheetThe English name is silicon lamination, which is a very low carbon ferrosilicon soft magnetic alloy, generally containing 0.5 to 4.5 percent silicon. The addition of silicon can improve the resistivity and maximum permeability of the iron, reduce the coercivity, core loss (iron loss) and magnetic aging. The production of silicon steel sheet is known as a handicraft in steel products, especially oriented silicon steel sheet, due to its complex process, narrow process window and difficult production. The main requirements for the performance of silicon steel are: ① low iron loss, which is an important indicator of the quality of silicon steel sheet. All countries divide the grades according to the iron loss value. The lower the iron loss, the higher the grade. ②The magnetic induction intensity (magnetic induction) is high under a strong magnetic field, which reduces the volume and weight of the core of the motor and transformer, and saves silicon steel sheets, copper wires and insulating materials. The surface is smooth, flat and uniform in thickness, which can improve the filling factor of the iron core. The punching is good, the manufacture of micro, small motor is more important. ⑤ The surface insulation film has good adhesion and weldability, which can prevent corrosion and improve punching properties. The basic non-magnetic aging. Silicon steel sheet has high permeability, low iron loss and is suitable for AC electromagnetic system. The magnetic induction strength of the silicon steel plate is high, the excitation current of the iron core (also known as no-load current) is reduced, and the copper loss and iron loss are reduced, which can save electric energy. When the power of the motor and transformer is unchanged, the magnetic induction strength is high, the design Bm can be increased, and the cross-sectional area of the iron core can be reduced, which reduces the volume and weight of the iron core, and saves the amount of silicon steel plate, wire, insulation material and structural material, which can reduce the total loss and manufacturing cost of the motor and transformer, and is conducive to the manufacturing, installation and transportation of large transformers and large motors. The design Bm of oriented silicon steel is as high as 1.7~1.80T, which is close to B8 value, so B8 is taken as the guaranteed value of magnetic induction. The motor design Bm is about 1.5T, which is close to the B50 value of the cold-rolled non-oriented silicon steel sheet, so the cold-rolled non-oriented silicon steel takes B50 as the guaranteed value of magnetic induction. The magnetic induction of hot-rolled silicon steel is lower, and B25 is usually used as a guarantee value.
Hunan Yongyi Technology Co., Ltd.
FE-30SST Lossmeter silicon steel monolithic iron loss measuring instrumentIt is a closed-loop control measuring instrument capable of precision compensation.
FE-30SST Lossmeter silicon steel monolithic iron loss measuring instrumentThe combination of single-chip microcomputer technology and analog electronic technology is used to sample the secondary induced voltage V and primary excitation current I in real time, and the low-loss silicon steel iron core is used as the magnetic circuit design of the test permeometer to compensate the air of the permeometer to 1.0mV or less.
The instrument is designed with GB/T3655-2008 as the standard. Under the premise of ensuring accurate measurement data and good repeatability, the mass loss Ps and magnetic induction Bm of silicon steel sheet can be measured accurately at the same time. Equipped with upper computer software, the B- H hysteresis loop, u-H permeability curve and Ps-B loss curve can be measured. At the same time, waveform feedback technology is adopted to ensure the sine of magnetic flux and can completely trace the brand source of silicon steel samples. Under certain circumstances, it basically meets the full performance parameters of silicon steel strip samples tested by the alternative square ring standard. It is a convenient and economical product for small and medium-sized silicon steel sheet users to control incoming inspection.
FE-30SST Lossmeter silicon steel monolithic iron loss measuring instrumentIt has the characteristics of small size, light weight, easy to carry, simple and fast operation, and convenient sampling.
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