The principle of silicon steel sheets to reduce eddy current losses in motors
Effect on eddy current losses The thickness of silicon steel sheets is closely related to eddy current losses. When the thickness of silicon steel sheets increases, the loop area formed by eddy currents increases, and eddy current losses rise sharply. For example, if the thickness of silicon steel sheets is increased from \(0.3mm\) to \(0.6mm\), the eddy current losses will theoretically become 8 times the original value when other conditions remain unchanged. This will not only cause serious heating of the iron core when the motor is running, but also reduce the energy utilization rate of the motor, resulting in a large amount of electric energy waste. On the contrary, using thinner silicon steel sheets, such as the common \(0.2 – 0.3mm\) thickness, can effectively reduce the eddy current loop area, significantly reduce eddy current losses, and improve the operating efficiency of the motor. Effect on magnetic permeability Thinner silicon steel sheets have advantages in...