The common iron core in household appliances mainly has the following types:

1. transformer core

silicon steel sheet core

Working principle: Using the good magnetic permeability of the silicon steel sheet, when the primary coil of the transformer is passed with alternating current, an alternating magnetic field is generated, and a change in the magnetic flux is formed in the iron core, thereby inducing electromotive force in the secondary coil.

Advantages: good magnetic permeability, can effectively reduce hysteresis loss and eddy current loss, improve the efficiency of the transformer. The price is relatively low and the manufacturing process is mature.

Application scenario: It is widely used in power transformers and audio transformers in various household appliances. For example, power transformers in televisions and audio equipment usually use silicon steel core.

amorphous alloy iron core

Working principle: Amorphous alloy has the characteristics of high permeability and low loss, and also realizes the change of magnetic flux and the transfer of energy under the action of alternating magnetic field.

Advantages: lower loss than silicon steel core, can significantly reduce the transformer no-load loss, energy saving effect is obvious. Small size, light weight, easy to install and layout.

Application scenarios: Some high-end household appliances, such as energy-saving refrigerators and air conditioners, may use amorphous alloy iron core transformers to improve energy efficiency.

2. motor core

Silicon steel sheet core (similar to the silicon steel sheet core in the above transformer)

Working principle: In the motor, the energized coil generates a rotating magnetic field, which interacts with the motor core to generate electromagnetic torque and drive the motor rotor to rotate.

Advantages: It has high magnetic permeability and good mechanical strength, and can withstand the electromagnetic force and centrifugal force of the motor during operation.

Application scenario: It is widely used in motors in various household appliances, such as washing machines, electric fans, range hoods, etc.

cast aluminum iron core

Working principle: By embedding permanent magnets or coils in cast aluminum, torque is generated by the interaction of magnetic fields.

Advantages: low cost and relatively simple manufacturing process. It has good heat dissipation performance and can effectively reduce the temperature of the motor during operation.

Application scenario: some small household appliances in the motor, such as electric shaver, hair dryer, etc., may use cast aluminum core motor.

3. inductor core

ferrite core

Working principle: Using the high permeability and good frequency characteristics of ferrite, when there is alternating current in the coil, a magnetic field is generated in the iron core to realize the function of inductance.

Advantages: Good high-frequency characteristics, suitable for inductive components in high-frequency circuits. The price is cheap, easy to process and shape.

Application scenarios: It is widely used in electronic products, such as power filters and anti-interference inductors for televisions and computer monitors.

iron powder core

Working principle: Similar to a ferrite core, a magnetic field is generated by the current in the coil, and energy is stored in the core.

Advantages: It has a high saturation magnetic induction strength and can withstand a large current. It has good performance in the medium and high frequency range.

Application scenarios: Some high-power household appliances, such as induction cookers, microwave ovens, etc., may use iron powder core inductors.