In today's society where the energy crisis is becoming increasingly urgent, end-users have high requirements for energy consumption and product price control. This requires users of silicon steel products to select appropriate grades of silicon steel products based on the needs of end-users. So specifically What factors should be considered? Let's introduce it to you below:
Users can select the appropriate variety, grade and thickness of electrical steel plates according to specific product conditions.
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Generally speaking, the silicon content of non-oriented electrical steel increases, the grade increases, P15 decreases, B50 also decreases, the hardness increases, the punchability decreases, and the cost increases.
Thickness
Choosing thicker steel plates can increase the lamination coefficient, reduce the punching workload and cost, but increase the iron loss.
1) For motors of household appliances
Home appliances are mostly micromotors and small motors no larger than 22KW, and the copper loss is larger than the iron loss. Electrical steel is required to have high magnetic induction intensity and good punching properties. At the same time, because the motor power is small, and most of the motors in household appliances are used intermittently, the power consumption is small, allowing the iron loss of electrical steel to be higher. Therefore, low-cost 0.50mm or 0.65mm thick low-carbon low-silicon electrical steel semi-finished products or fully annealed products are used.
2) For large motors and generators
Because this type of product has high power and long-term operation, and consumes a lot of power, it must be made of high-cost 0.35mm or 0.50mm thick low-iron-loss high-silicon (high-grade) non-oriented silicon steel. Due to the high silicon content, the punchability is reduced, but the punching size is large, so it can also meet the requirements.
The transformer has no-load losses within 24 hours and consumes more power. The laminated core must be made of high-cost 0.23~0.35mm thick oriented silicon steel, and the wound core must be made of 0.23~0.27mm thin strip.
Electrical products with operating frequencies higher than 50Hz or 60Hz (such as medium and high frequency motors and transformers, pulse transformers) should be manufactured with higher cost silicon steel strips as the frequency increases, because at higher frequencies, Pe and PT increase. Table 1 shows the relationship between the operating frequency and the selected electrical steel plate thickness and lamination coefficient.