[Motors (Motor) Laminations Stator, Rotor Quality Detection Scheme [Keywords: Stator Core Rotor Core Iron Loss Magnetic Intensity Magnetic Field Strength]
Motor (motor) lamination stator, rotor quality detection can be used MATS-2010M silicon steel measuring device, by adding a multi-strand test connection, direct measurement of the motor (motor) stator and rotor in a certain magnetic induction B (Magnetic Induction B) Or P (Losses P) in Magnetic Field Strength H.
In this scenario, 25 cm of Epstein Square (Epstein Square) is retained as a test data criterion for determining whether an unknown stator or rotor core meets requirements. According to the IEC standard, the above-mentioned magnetic induction and magnetic field strengths are taken as the peak values Bm and Hm, respectively, and the loss is converted into the total loss Ps (unit: W/kg).
Because the magnetic circuit of the stator and the rotor is more complex, it must be simplified and approximated for ease of analysis and comparison. For different size stators (or rotors), by converting the test results of a standard stator (or rotor) core to Epstein's square, its effective size parameters and equivalent quality can be determined.
【Test Methods】
The first step: use the same batch of material to make square ring samples (about 1kg) and stator (or rotor) core punching. The production of square ring samples and core punches should fully consider the representativeness and uniformity of the materials.
The second step is to test the loss of the square ring sample. Based on the test results, it can be determined whether the material meets the grade requirements.
After the material is qualified, the standard stator (or rotor) core is measured. When measuring the stator (or rotor) core, select the ring, take the solid part of the inner and outer diameter, temporarily ignore the impact of open teeth, the height according to the actual value, the lamination factor to consider the chamfer and notch of the core, the weight first calculated according to the total weight.
The core iron loss measured by the above method is smaller than that of the ring sample, mainly because the mass of the upper iron core is larger, and the mass of the open tooth portion cannot be counted, but it cannot be ignored. By adjusting the mass of the iron core, the iron loss of the iron core coincides with the iron loss of the square ring sample, so that the equivalent quality of the iron core of this size is obtained. In particular, it should be noted that the magnetic flux leakage effect of the open tooth portion is not considered here, mainly for the sake of simplicity. More practically, even if it is a ring-shaped core, the measured iron loss is not consistent with the iron loss of the square ring sample because the iron loss of the square ring sample refers to the performance of a material. The measurement complies with a strict international standard. Iron core loss refers to the performance of a device. It is also affected by the size and shape of the core.
Record the inner core, outer diameter, height, lamination coefficient and equivalent mass of the standard iron core above. These parameters are the standard parameters for measuring other iron cores of the same size. Keeping these parameters consistent will result in the measurement results between the unknown core and the standard core. It has good comparability, and at the same time, the measurement results can reflect the performance of the material to some extent.
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