The analysis of the advantages and disadvantages of laboratory centrifuge motor

The analysis of the advantages and disadvantages of laboratory centrifuge motor

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Laboratory centrifuge variety, how to choose the centrifuge is a more complicated things, also it is a science. Not much else to say, take it with motor fittings centrifuge, a centrifuge with a brush motor, brushless motor. The situation appears frequently in the customer purchase centrifuge. Parameters which have said a centrifuger, brushless motor and other motors. These kinds of motor price difference, and each have their use, so customers in the selection of laboratory centrifuge motor on scene. Below I to these two kinds of laboratory centrifuge motor do compare advantages and disadvantages, make a reference for everyone.
One, to understand the advantages and disadvantages of laboratory centrifuge centrifuge brush motor brush motor is in the internal structure of electrode using carbon brush motor, 2 brush centrifuge motor (copper brush or brush) is the result of the insulating seat is fixed on the motor back cover directly to the power of positive and negative is introduced into the rotor phase converter, and phase converter connected to the coils on the rotor, the 3 coil polarity from time to time alternating 2 block fixed transform and shell magnet forming force and rotate. Advantages: has the advantages of simple manufacture, low cost and its advantages! Defect: normal boot after work, constant speed, speed is not easy, because the phase changer and the rotor is fixed together, and the brush and the shell (stator) fixed together, the motor rotates the brush and the phase changer from time to time attack friction resistance and a lot of heat. So there is low efficiency loss of the brushless DC motor is very big.
The advantages and disadvantages of two, laboratory centrifuge on centrifuge brushless motor brushless motor without carbon brush in the definition is that the internal structure of the electrodes of the motor! Advantages: rotary contact point no load resistance it mainly from the rotor and the stator, so ordinary brushless motor in rotor ends are the use of the ball bearings to reduce friction! This is not the frictional resistance and a lot of heat (in fact, or may have a fever, just heat source from the coil resistance loss), has a very high (above 80%-90%) efficiency and high speed! Usually the number of frequency control, strong controllability, per minute from a few to tens of thousands per minute, to turn can easily complete the application demand, common in high power output of the model, to provide a strong driving force of outstanding! Defect is: speed control system for its more than the cost of a speed control system of brushless high-speed motor must be high, and centrifuge controller in the use of easy to break down. Now that more is the DC brushless motor.
The above two kinds of motor are common motor, suitable for different places. Laboratory centrifuge to understand centrifuge brush motor manufacturing costs low, so the market price is relatively affordable, start work after the constant speed. The use of suitable for ordinary laboratories, research institutions, present a brush motor has been accounted for the dominant position, but with the technology request more and more high, have the application of BLDC motor in terms of reduced gradually in the centrifuge. While laboratory centrifuge about brushless motor has strong controllability, low loss of power, has the advantages of small noise, no dust and environmental protection features, although say the price is higher, but get large laboratories and scientific research units of love, especially environmental protection, long life and energy saving aspects of the characteristics, so its applications are more and more in centrifuges wide.