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    Type and common fault of Electromagnetic Active buzzer

    2017/12/25      view:
    First: split by envelope (start Biotinge start), the buzzer is cheaper (the market price of about 0.30 yuan, this price is for reference only); the performance of this type of buzzer is not stable, the environmental impact is obvious, such as vibration, in the transport process in the production line of welding (the product no soldering or dip tin), at high temperature (60 degrees) or low (-20) used in the environment; and the difference of interference, such as peripheral magnetic components (in the week, coil inductance, transformer, magnet, etc.) the above situation will affect the buzzer sound, light, sound and sand sound or sound when not ringing while without sound, the buzzer is suitable for low-end electronic products use. The buzzer is most sold in the big electronic cities.
    The second one is the split type, which is started by hard package (combined tube start). The buzzer is moderate in price (the market price is about 0.45 yuan, this price is for reference only). This kind of buzzer has better stability than the first one. This buzzer is more suitable for the use of middle - end electronic appliances.
    Third: a single start with hard encapsulation (1 composite tube, the buzzer start) on the price (the market price of about 0.65-1.00 yuan, the price is only for reference) the buzzer to better environmental adaptability, can pass the wave soldering and solder dip, but the anti-jamming performance is not ideal.
    Fourth: a body made of hard sealed double start (2 combined pipe, the buzzer start) high price (market price 1.00-2.00 yuan, the price is for reference only) this type of buzzer usually use plastic shell of high temperature resistance and anti interference coil, magnetic ring production, the buzzer to adapt to the environment of good performance, poor rate low. It is suitable for the use of middle and high end electronic products. This is our main production and main push buzzer products.
    The 4 kinds of buzzer in the use of bad situations usually have the following:
    The 1: not before the installation, this is the buzzer itself, the quality of the first kinds of buzzer is more likely to occur.
    2: welding after ringing sound or no sound when, this situation may be the use of iron power in the welding process is too large (with 20-30W iron) or time (3 seconds to complete a joint proposal) led to the buzzer pin and the coil welding point after heat melting.
    The 3 is: after welding, there are small, no or sandy tones in the process of buzzer calling. This situation may be too small or too much current to start the buzzer (the normal working current of buzzer 20-30mA), so that the buzzer can't normally chirp.
    4: no sound or sound a buzzer after a period of time, this situation may be a long time continuous chirping (buzzer buzzer chirping continuous time not more than 8-10 hours, otherwise it will change or burn out) or buzzer was influenced by the environment. The 5 is that when the buzzer is working on the wire board after welding, it appears tone sandhi or no sound, but it is no problem to remove the DC power supply test, which may be disturbed by the buzzer.
    The 5 of the above cases are the most prone to buzzer in the use of the fault, and other failures are no longer described here.
    When you choose a buzzer, you can't just look at the price, but ignore the characteristics of your own circuit. The buzzer should be selected according to the design characteristics of your electronic product line, which can effectively avoid the bad phenomena of the above 5 situations. If the electronic product line design has strict requirements for the current loss of electronic components, buzzer manufacturers can match the low current loss buzzer when the starting current of the buzzer is lower than 10mA.