In previous studies, the influence of various factors on motor noise has been widely explored, such as the influence of pulse width modulation current on the acoustic noise behavior of internal permanent magnet synchronous motor drivers; The influence of winding, frame and impregnation on the stator resonance frequency; The influence of iron core clamping pressure, winding, wedge, tooth shape and temperature on stator vibration behavior of different types of motor.

In recent years, the global environment is facing more severe challenges, and it is urgent to improve motor efficiency and reduce motor loss. In addition, with the rise of new mobile technologies, the use environment and specification requirements of motors have also changed, requiring smaller and higher power output motors.

Modern society needs a lot of energy, especially clean energy and adaptable electricity. The largest consumer of electricity is the electric motor, which uses more than 57.3 percent of its electricity. Motors are divided into industrial, commercial and home applications, and improving motor efficiency is an effective way to quickly achieve energy saving.

The silicon content of silicon steel gives it unique magnetic properties that make it ideal for use in transformer cores.

 Silicon steel is a silicon alloy with very low carbon content, made by adding silicon to pure iron. It is used in transformer cores because of its magnetic properties and resistance to corrosion.

Electrical steel also known as Silicon Steel is used in a variety of applications ranging from transformer cores, generators and motors to magnetic cores and electrical components.

Non-oriented silicon steel, sometimes called non-oriented electrical steel, is commonly used in electrical applications. This steel has low core losses and is ideal for windings of chokes, transformers and armatures. Non-oriented silicon steel is the alloy of choice for producing AC motors, generators and induction heating systems.

Electrical steel is divided into grain-oriented electrical steel and non-oriented electrical steel.

Electrical steel is an indispensable and important soft magnetic alloy in the electric power and electrical industries.