The working principle and development of magnetizer

The working principle and development of magnetizer

With the rapid renewal and development of technologies such as motors, household electronics, computers, and communications, the demand for permanent magnet materials is increasing and the performance is higher. At present, most permanent magnet materials use neodymium iron boron, ferrite, alnico, samarium cobalt, etc., and have the characteristics of high coercivity and stable performance. These materials are instantaneously transmitted to the solenoid by the high voltage and large current of the magnetizing power supply. Pulse discharge to magnetize it. During production, the magnetizing power supply is required to be efficient, stable, and high in accuracy. At the same time, the magnetic flux of the permanent magnet material after magnetization is tested on the machine. The magnetization and measurement introduced in the article are an integrated high-efficiency automatic magnetization machine, using plc to achieve system control, and touch screen as parameter adjustment and work display.

The working principle of the magnetizer is: first charge the capacitor with a DC high voltage voltage, and then discharge it through a coil with very small resistance. The peak discharge pulse current can reach tens of thousands of amperes. This current pulse generates a strong magnetic field in the coil, which permanently magnetizes the hard magnetic material placed in the coil. When the magnetizer capacitor is working, the peak value of the pulse current is extremely high, and the performance of the capacitor withstand the impact current is very high.

The structure of the magnetizer is relatively simple. In fact, it is an electromagnet with extremely strong magnetic force. It is equipped with iron blocks of various shapes as additional magnetic poles to form a closed magnetic circuit with the magnet to be magnetized. When magnetizing, arrange additional magnetic poles, and When the magnet is charged, just add the exciting current, and the brush can be completed in an instant.