Switch application and the performance parameters of the encoder
Switch to switch encoder straight slide layout in the application of the encoder encoder, has been widely used in electrical products around us, switch the encoder by sliding the brush handle a straight line method to change the electrical resistance, and then obtain and brush displacement into must contact the output voltage.
Switch the encoder has long service life, low noise level features, its scale is widely used, the application in the following aspects: one, for a variety of speakers or home equipment of various control;
Second, for the volume control, image quality, various control;
Three, is used to heat the oil heating furnace, various control of electric heating carpet;
Four, used in electronic Musical Instruments and car air conditioning thermal control devices;
Five, was reclining at the table used for car interior heating, dimmers, water and other manipulation.
Switch encoder skeleton and usually made from insulation function outstanding data matrix, and the demand for heat resistant, resistant to moisture, good electrical insulation, chemical stability and good thermal conductivity, and as long as the necessary mechanical strength.
Usually with laminated paper plastic board, laminated board, plastic, ceramic, glass and appearance, such as copper, aluminum and aluminum alloy through insulation disposal I this kind of appearance of metal substrate, the insulation treated should have meet the exterior insulation, the skeleton matrix has excellent heat resistance, and easy to take shape.
When rotary encoder switch, its corresponding value changes according to the rotation Angle, according to the change rule can be divided into X, Z, D type.
X is linear, linear change its value according to the rotation Angle.
The encoder fit for a partial pressure, regulating current, the TV field frequency adjustment, etc.
Z is exponential, change its resistance index according to rotation Angle according to relations.
It is often used in the volume adjustment circuit, due to the human ear hearing characteristics of sound is close to the logarithmic relationship, when the volume increases gradually from scratch from a process, the human ear hearing the most sensitive to the volume change, when a certain degree in volume, the human ear hearing gradually become dull.
So the volume adjustment generally adopts the exponential encoder, change a voice sounds appear smooth and comfortable.
Type D is logarithmic type, its value according to the rotation Angle relation of number in pairs.
Applicable in tone control circuit, etc.
Fine-tuning resistance value can be adjusted as the encoder, without turning the handle, adjust is not convenient, so, fine-tuning resistance is used to need to adjust, but does not need constant adjustment circuit.
In the computer, precision instrument, communication equipment and household appliances, flake or cylindrical shape also used without pin switch encoder, it has small volume, light weight, good high frequency characteristics, wide range to adjust resistance, temperature coefficient is small, low power rating, etc.
Switch the main performance parameters of the encoder nominal value and allowable deviation of 1, switch encoder switch is commonly used encoder E6, series of E12 at 11:45.
Encoder of the actual total resistance and the maximum allowable deviation between nominal resistance is the resistance accuracy encoder.
2 the power rating of the encoder and switch, switch the encoder and the definition of the rated power of the power rating of the resistor as similar definition.
According to the regulation of national standard, the encoder rated power of nominal series in the switch selection of the encoder, in addition to the note on the parameters of the switch the nominal resistance and the rated power of the encoder, these two parameters are also consider switch encoder volume, long shaft, the shaft end form, etc.
Shanghai electronic products co. , LTD. , is 26 years old, encoder manufacturers, specializing in the production of various types of encoder, a rotary encoder, straight and smooth encoder, rocker encoder, switch, encoders, such as motor encoder.
Can provide customers with a axis type, long axial length and working parts, shaft sleeve type, long sleeves, the resistance and its linear error values, professional custom.
Encoder models complete, the company as a ready-made model can't meet your requirements, can be customized.
Electronic cherish the opportunity to cooperation with each customer, with higher quality pursue, named 'best supplier by customers for many times, become a peer leader, with 20 years of professional experience, become national standards unit.
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