For the use of DC brush motor micro-pump, micro-vacuum pump, pumping two pumping air, the motor interference problem is bound to exist. As the motor between the brush and commutator high-frequency conduction, disconnect, go back and forth, will produce a lot of clutter in the circuit. The amplitude of these clutters is high, usually several times the rated voltage, and varies in amplitude and frequency. These clutters "contaminate" the entire power supply by entering the circuit by connecting the motor's power cord. If the power supply is still supplying power to the control circuit, it is not uncommon for many electronic components (such as microcontrollers, LCD screens, etc.) to malfunction due to the impact of these clutter up to several tens of volts (40-90 volts, for example). Practice shows that there is a random instrument failure time, and the failure may not be the same each time, so find the reasons are often complicated.
Low interference pump is developed to solve this problem, the product design and production also take into account due to the interference caused by the magnetic field space. After many years of experiments and feedbacks, it has been found that the disturbance is mainly caused by the pollution of the power supply by the motor. At present, no phenomenon has been found that the low-interference micro-pump interferes with other components through the effect of the space magnetic field. Such as miniature vacuum pump VAA series, PK series, high vacuum VBH series, VCH series can be made into a low electromagnetic interference type.
Low interference micropump generated by the clutter amplitude are below 400 millivolts, the basic can be more than 99% of the clutter removed, over the years did not affect the normal operation of the microcontroller and the liquid crystal display. After the determination of the clutter amplitude of imported products due to different manufacturers generally between 200 millivolts to 3 volts.
If you need a miniature vacuum pump and miniature air pump, air pump dual function, such as FM series, FAA series, PCF series, also can be customized low electromagnetic interference.
Reminded: A large number of practices show that interference problems lead to abnormal time of the instrument is random, sometimes no, not easy to detect, to be extra careful.
Therefore, it is recommended in the above applications, it is best to use low electromagnetic interference models (individual series currently can not be customized low-noise).
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