The centrifuge focuses on experimental analysis and testing.

　　 Centrifuge The motors commonly used in such applications are typically series-wound motors. They consist of two main parts: the stator and the rotor. The stator comprises a centralized, fixed magnetic pole made up of an iron core and magnetic field windings. The rotor consists of an iron core, rotor windings, and a commutator. The brushes play a crucial role in connecting the stator windings to the rotor windings via the commutator. The operating principle of the series-wound motor's circuit is as follows: current flows from the power source through the stator’s magnetic field windings, then through the brushes, into the commutator, and finally into the rotor windings. From there, the current returns to the power source via the brushes and the stator’s magnetic field windings, thus completing the circuit. The magnetic field windings and the rotor windings are connected in series through the commutator and brushes. Since the current is the same throughout the entire circuit, the motor can only operate at its designed speed if the series circuit remains unobstructed and free of any breaks. Therefore, it is evident that the operational condition of the brushes directly affects the normal operation of the motor. However, due to factors such as wear, consumption, or spring failure during the brushes’ contact with the commutator, the brushes can easily become open-circuited or lose contact with the commutator—this being one of the primary causes of centrifuge shutdowns or reduced rotational speeds.
　　The centrifuge company focuses on the research and development of instruments for experimental analysis and testing, and also engages in the agency sales of instrumentation, reagents, and equipment in this field, as well as providing external maintenance services for such instruments and equipment. Shenhua boasts a highly qualified, multidisciplinary team dedicated to instrument and equipment R&D, holding numerous patents and having several more patent applications currently under review. The company offers a wide range of centrifuge instruments and equipment, including high-speed centrifuges, high-speed refrigerated centrifuges, low-speed centrifuges, and low-speed refrigerated centrifuges, as well as other types of instruments and equipment such as electrophoresis units, electrophoresis power supplies, spectrophotometers, incubators, and more. These instruments feature brushless, maintenance-free motor drives, microcomputer control, digital displays, a steel frame, and a stainless steel inner chamber. During operation, users can adjust running parameters as needed. They are widely used in biological, agricultural science, and clinical medical research, particularly suitable for experiments involving small sample volumes and requiring high centrifugal forces.
　　Improper use of centrifuges—such as exceeding speed limits, overloading, or failing to maintain balance—can damage the instrument and even cause it to explode, posing a serious threat to personal safety. Therefore, manufacturers pay particular attention to this issue. Centrifuge Safety design: Internationally, various countries have established corresponding safety standards, such as Germany's standards for the protection against accidental incidents in centrifuges (UVV, VBG 7Z) and industrial standards for centrifuges and centrifuge tubes (DIN 58970, PART I, 2, 3, and 4). The primary aspects of centrifuge design include: ① A door-lock protection system featuring a dual-layer mechanical and electronic lock. The centrifuge can only be started after the door lock is securely closed, and the lid can only be opened once the motor has come to a complete stop. ② The centrifuge chamber and lid are made of robust armored steel to prevent the escape of flying debris. Detection of rotor imbalance is critically important, as rotor imbalance can cause the motor shaft to oscillate, shortening the centrifuge’s service life. In severe cases, it may even lead to breakage of the motor shaft or even rupture of the rotor head. Typically, rotor imbalance is detected by monitoring the oscillation of the motor shaft. Common detection methods include mechanical limit switches, magnetoresistive sensors (MSR), ultrasonic ranging, and acceleration sensors.
　　The speed-regulating system is the core component of a centrifuge, consisting of three major elements: control, power drive, and motor. Its primary function is to regulate the motor's rotational speed. In the development of centrifuges, DC speed regulation has played an indispensable role. Its key features include excellent starting and braking performance, a wide speed-regulating range, simple structure, low cost, and both theoretical and practical maturity. Consequently, before the 1980s, DC speed regulation was widely adopted in centrifuges and remains in use today, undergoing continuous improvement. For instance, efforts have been made to enhance the wear resistance of DC motor commutators and carbon brushes, thereby extending the motor's service life and increasing the intervals between carbon-brush replacements.
　　A centrifuge operates by having its rotor spun at high speed via a motor. In the past, these motors were DC motors equipped with carbon brushes. As the centrifuge runs, the carbon brushes wear down, producing sparks, noise, and even vibrations. Moreover, carbon brushes have a limited lifespan, so they must be replaced periodically before the motor can resume operation. Even more serious is that the wear of carbon brushes generates carbon dust, which not only contaminates the environment but also poses health risks. Centrifuge It can also pollute the surrounding environment, and this type of pollution is unsuitable for the healthcare industry.