Common Points And Differences Between Magnetic Powder Brake And Hysteresis Brake

Magnetic powder brake is just an analog load, or tensioner. The magnetic particle dynamometer is equipped with a force sensor and a speed encoder on the magnetic powder brake, which can test the mechanical performance parameters of the motor, such as torque, speed, and output power.
What is the working principle of magnetic powder brake? For those who have just come into contact with magnetic powder brakes, the principle may not be very clear. The editors below will come together for you.
Working principle of magnetic powder brake: Under the action of energization, the principle of using magnetic powder as a working medium to form a magnetic powder chain (the magnetic powder that is connected to the current will be formed under the action of magnetic lines of force) is used to connect the inner and outer rotors, thereby achieving transmission and control. Moment of purpose. A complete magnetic powder brake usually includes the exciting coil, magnetic powder, inner rotor and outer rotor and so on.
The magnetic powder brake is made of high-quality imported magnetic powder and high-precision CNC. It has the advantages of high accuracy, high-speed response, low noise and good heat dissipation, stable performance, no vibration and no impact, and can achieve a smooth continuous drinking drive state. It has been widely used in printing and dyeing, wire and cable and other industries.
    
Differences between magnetic powder brake and hysteresis brake
 
The use of magnetic particle dynamometer is controlled within a certain torque unit, which is not suitable for linear adjustment! The hysteresis brake is non-friction, the hysteresis rotor is made of metal, and its life depends on the internal bearing! General imported bearings, such as NSK, Minya, etc. can work continuously for about 5 to 6 years, but because it is non-friction technology, to obtain large torque, the contact area of the rotor in the magnetic field must be large enough, so it is relatively , The volume of the hysteresis brake will be slightly larger than the magnetic powder! Using hysteresis dynamometer, due to its non-friction characteristics, your minimum torque can be extremely small! It is suitable for ultra-wide range of linear torque measurement, adjustment, and extremely fast response speed. It can adjust and measure from 0 to the maximum rated torque!
A. Non-contact torque transmission: The magnetic powder brake continuously changes through the air gap of the brake or clutch of the mechanical component, and then becomes constant to avoid any wear.
B. Continuously adjustable torque: The magnetic powder brake torque or transferable torque only depends on the current, which is largely independent of the speed. It is continuously effective from zero to the maximum speed.
C. High power continuous mode, can be overloaded: The magnetic powder brake power optimization brake series can sustain high power continuously. Can withstand overload in a short time. Hysteresis brakes, electromagnetic brakes, and brakes are divided into single-output shaft hysteresis brakes and dual-output shaft hysteresis brakes. They are selected according to the use space and installation form, and their applications are wide and versatile. Mainly used in high-speed winding equipment; simulated loads for life tests of motors, small internal combustion engines, gear boxes and other rotating devices; precise loads for high-end sports equipment. Based on the standard hysteresis brake, an air cooling device is added to it.
When the magnetic powder brake is operated for a long time, its temperature will rise sharply, and the air-cooled hysteresis brake can run continuously for a long time under high slip power. The torque is the same at multiple current specific points, and multi-axis tension control can be achieved using only one control system. Mainly used in multi-roll yarn, glass fiber unwinding device and processing machinery such as cable and rope.

Features:
A. Non-contact torque transmission: The magnetic powder brake continuously changes through the air gap of the brake or clutch of the mechanical component, and then becomes constant to avoid any wear.
B. Continuously adjustable torque: The magnetic powder brake torque or transferable torque only depends on the current, which is largely independent of the speed. It is continuously effective from zero to the maximum speed.
C. High power continuous mode, can be overloaded: The magnetic powder brake power optimization brake series can sustain high power continuously. Can withstand overload in a short time.
 D. High speed, the highest speed can reach 15000rpm. We provide hysteresis brakes of 0 ~ 6N / M. Overview Hysteresis brake is a superior torque and tension control component. It uses the principle of hysteresis to generate a certain torque by controlling the input excitation current.
The magnetic powder brake current has a good linear relationship with the output torque. It can provide smooth, steplessly adjustable, speed independent torque control. In addition to bearings, there is no other friction in the system, which has the advantages of stability and reliability, high speed and low noise, long service life, and low maintenance costs.

Structure
Hysteresis brake consists of two parts: rotor and stator poles. The rotor is made of special hysteresis material, there is a certain gap in the stator poles, and the rotor rotates in the gap. When the coil is energized, a magnetic field is generated in the gap, causing the rotor to produce a hysteresis effect. When the hysteresis rotor rotates against the hysteresis force under the action of external force, it generates the rated torque. The torque is only related to the magnitude of the exciting current, and has nothing to do with the speed. It realizes non-contact torque transmission.

Features
The excitation current is basically proportional to the output torque. The transmission torque of the magnetic powder brake can be controlled within the range of 5-100% of the rated value. A small current can control a larger output torque.
Regardless of the change in slip speed, the torque it can transmit remains essentially unchanged. It can continuously rotate under the allowable slip power, without any wear parts except bearings, non-contact torque transmission, smooth operation, wide speed range, maintenance-free and long service life.