Due to the high switching frequency, generally less than 50KHZ, the smooth DC current can be obtained only by the inductance filtering of the motor itself, which overcomes the shortcomings of DC speed regulation, so the speed is smoother and the speed regulation range is wider. This made the early ultra-speed or high-speed centrifuges Indirect speed-increasing schemes such as gear shifting or other methods have to be adopted, which increases cost and volume, and reduces life and reliability. Although the DC speed regulation has a long history and mature technology,

the commutation of the DC motor mechanical commutator is its fatal weakness, which limits the speed of the motor, the commutator brings interference, and the carbon brush needs to be replaced. Even a dozen discrete devices or an integrated block can form a system, so some low-cost centrifuges in China still use this scheme. After the 1980s, with the development of fully controlled power devices, such as power transistors and field effect transistors, switching power conversion technology was gradually applied in the DC speed control system of the centrifuge.

The unbalance of the rotor will cause the motor shaft to swing, affecting the life of the centrifuge. The speed adjustment system is the core part of the centrifuge, which is composed of three major elements of control, power drive and motor, mainly to control the speed of the motor. According to different AC motors, the frequency conversion speed regulation is also different. Its structure is mainly composed of motor drive system, refrigeration system, mechanical system, rotor and system control., and high-speed centrifuges often use a flexible shaft to resist shock. Its main characteristics are good starting and braking, wide speed range, simple structure, low cost, and relatively mature theory and practice.

Some Disposable Plastic Ware have introduced frequency conversion Speed ​​regulating centrifuge.cn. Many rotors provide a wide range of applications for scientific researchers and become the preferred model for scientific research laboratories. Environmental protection is mainly manifested in two aspects. It uses the difference in precipitation speed of different substances in the centrifugal force field to achieve the analysis and separation of samples. Generally speaking, the talking sound is usually 60 points p, and the sound of public gas cars is 70 to 80 decibels. ②Centrifuge chamber and cover The use of sturdy armor steel to prevent the unbalance detection of the rotor flyaway center rotor is important

Shaoxing ShangYu Mingji Plastic Co., Ltd

Add:Shengqiao Village, Xiaoyue Town, Shangyu , ZheJiang Province, China

Phone: +86-15605850905

Tel: +86-0575-82937599

Fax: +86-575-82036018

E-mail: [email protected]