Introduction to slide switch, slide switch, slide switch for short, slide switch type, slide switch classification, slide switch series, slide switch type, patch slide switch, miniature slide switch, small slide switch, SMT slide switch, SMD slide switch ,KSDKG slide switch, KOSOD slide switch, KESIDA slide switch
Switching power supply is a kind of power supply that uses modern power electronics technology to control the ratio of time when the switch is turned on and off, and maintains a stable output voltage. The switching power supply is generally composed of pulse width modulation (PWM control IC and MOSFET). Switching power supply and linear power supply phase. Compared, the interest rate of both increases with the increase of output power, but the growth rate of the two is different. The linear power supply cost is higher than the switching power supply at a certain output power point, which is called the cost reversal point. With the development and innovation of power electronics technology, switching power supply technology is also innovating from time to time. This interest reversal point is increasingly moving to the low output power end, which provides a broad space for development of switching power supplies.
The toggle switch adopts integrated circuit technology and SMT external device technology to manufacture a new generation of photoelectric switching devices with intelligent functions such as delay, broadening, external synchronization, mutual interference resistance, high reliability, stable working area and self-diagnosis. This novel photoelectric switch is an active photoelectric detection system type electronic switch using pulse modulation. The cold light source used has infrared light, red light, green light and blue light, etc., which can be contactless and quickly and without damage. Controls the state and action of various solids, liquids, transparents, black bodies, soft bodies and smoke. The waterproof and explosion-proof switch contact type travel switch has the disadvantages of low response speed, poor precision, easy detection of damage to the object to be detected and short life, and the proximity of the transistor proximity switch is short, and the non-metallic material cannot be directly detected. However, the new photoelectric switch overcomes the above shortcomings, and has small volume, many functions, long life, high precision, fast response speed, long detection distance and strong resistance to light, electricity and magnetic interference.
At present, this new type of photoelectric switch has been used for level detection, liquid level control, product counting, width discrimination, speed detection, fixed length cutting, hole identification, signal delay, automatic door sensing, color mark detection, Punch and shearing machines, as well as safety protection and many other fields. In addition, the use of infrared concealment can also be used as a burglar alarm in banks, warehouses, shops, offices and other places where it is needed. The step-down repair method can be used when repairing the switching power supply.
The method is to connect the power plug of the display to an AC voltage regulator, and then adjust the output voltage of the voltage regulator to about 100V, then power on and repair, and sequentially increase the power supply voltage for maintenance. Fault example 1: burned out when booting, the output voltage is zero. This situation is generally caused by the breakdown of the switch tube and the short circuit of the emitter and the collector. At this time, the switch tube can be removed first, and the emitter and collector resistance of the ground is measured, such as zero or small. Change it. However, it is also necessary to check whether the components have problems or not. Fault example 2: The grating appears “S-shaped distortion. This problem should focus on checking the filter circuit and the voltage regulator circuit. Generally, there is a diode open circuit, which is converted from full-wave rectification to half-wave rectification. This may also be its filter capacitor. Example 3: Failure of capacity reduction: AC 220V rectifier filter circuit has short-circuit fault, and burn-in insurance. Check whether the rectifier diode is short-circuited or the filter capacitor is seriously leaked. Also remove the degaussing coil plug and check the degaussing heat. Sensitive resistors have short-circuit faults, if they should be replaced with new ones. Fault example 4: no grating, no display, no power indicator, but not burned. At this time, check whether the AC mutual inductance transformer is open or the limit of the rectifier circuit. Whether the flow resistance has an open circuit (burn) failure, or whether the rectifier diode is open. Fault example 5: no grating, no display, and an abnormal sound is emitted inside the machine. If a “å±å±â€ sound is emitted, the oscillation frequency is low, and should be checked and Oscillation related components, such as a "beep" sound, indicating power overcurrent protection, should check the overcurrent protection circuit
1 Photoelectric switch can be used in various applications to prevent strong light source. Photoelectric switch can work stably when the ambient illumination is high. However, the optical axis of the sensor should be avoided against strong light sources such as sunlight and incandescent lamps. When the angle between the optical axis of the sensor (receiver) and the strong light source cannot be changed, a visor or a light-shielded long tube can be attached around the sensor.
2 To prevent mutual interference, the MGK series of new photoelectric switches usually have the function of automatically preventing mutual interference, so there is no need to worry about mutual interference. However, when the HGK series of on-beam infrared photoelectric switches are installed close to each other in several groups, they should prevent adjacent groups and mutual interference. The most effective way to prevent this interference is to cross the emitter and receiver, and to open the group distance when you exceed the 2 groups. Of course, it is also a good idea to use a different frequency model. An effective way to prevent mutual interference from HGK series reflective photoelectric switches is to open the gap. Moreover, the farther the detection distance is, the larger the interval should be. The specific interval should be determined according to the debugging situation. Of course, models with different operating frequencies can also be used.
Toggle switch - 3 Mirror angle effect: When the measured object is shiny or encounters a smooth metal surface, the general reflectivity is very high, and it has a mirror-like effect. At this time, the emitter and the detection object should be installed at 10 20 °. The angle is such that its optical axis is not perpendicular to the object being detected, thereby preventing malfunction.
4 Exclusion of background effects: When using reflective diffuser type emitters and receivers, the photoelectric switch may not be stable due to the fact that the detected object is close to the background, and the photoelectric switch or the background is smooth and other objects with high reflectivity. . Therefore, it is possible to use a distance-limited type of projection or light receiver, or to remove the background object, remove the background object, paint the background material as matte black, or try to make the background object rough and gray.
5 Self-diagnostic function: When the device or the device is used, there may be problems such as slight shift of the optical axis, lens contamination, dust accumulation, external noise, and excessive ambient temperature due to the influence of the table top or the background and the use of vibration. These problems may cause the photoelectric switch to deviate from the stable working area. At this time, the self-diagnosis function of the photoelectric switch can be used to notify the user through the STA BLITY green stability indicator to remind the user to adjust it in time.
The toggle switch is classified according to the structure. The photoelectric switch can be classified into three types: amplifier separation type, amplifier built-in type and power supply built-in type.
1 Amplifier split type separates the amplifier from the sensor and is fabricated by an ASIC and a hybrid mounting process. Due to the ultra-small and multi-variable characteristics of the sensor, the amplifier has many functions. Therefore, this type uses the terminal block connection method, and can be used for AC and DC power supplies. With on-off and off-delay function, it can set bright and sound-changing switch, can control 6 kinds of output states, and has two output modes: contact and level.
2 The built-in amplifier is a combination of amplifier and sensing. It is fabricated by ASIC and surface mount technology and operates with DC power. Its response speed (both 0.1m and 1m) can detect small and high-speed moving objects. Change the polarity of the power supply to switch between bright and dark, and set the self-diagnosis stable working area indicator. It has two output modes, voltage and current, which can prevent mutual interference and is very convenient in system equipment.
3 Power supply built-in type is the integration of amplifiers, sensors and power supply devices, using ASIC and surface mount technology. Generally, the AC power supply is used, which is suitable for replacing the contact type travel switch at the production site, and can be directly used for the high-power control circuit. You can also set the self-diagnosis stable working area indicator. The output is equipped with SSR solid state relay or relay normally open and normally closed contacts to prevent mutual interference and can be installed tightly in the system. 3 Photoelectric switch working principle Small audio analog switch The modulated pulse generated by the oscillation circuit passes through the reflection circuit, and the light pulse is radiated from the light-emitting tube GL. When the measured object enters the range of the receiver, the reflected light pulse enters the phototransistor DU and demodulates the optical pulse into an electrical pulse signal in the receiving circuit, and then is amplified by the amplifier and synchronously gated, and then digitally integrated. Or RC integration method to eliminate interference, and finally trigger the driver output photoelectric switch control signal after delay (or no delay). Photoelectric switches generally have good hysteresis characteristics, so that even if the object is shaken in a small range, the output state of the driver will not be affected, so that it can be kept in a stable working area. At the same time, the self-diagnostic system can also display the light-receiving state and stable working area to monitor the operation of the photoelectric switch at any time.
4 Characteristics of photoelectric switch MGK series photoelectric switch is the product of the development of modern microelectronic technology, and the upgrading of HGK series infrared photoelectric switch. Compared with the previous photoelectric switch, it has its own remarkable features: it has self-diagnosis and stable working area indication function, which can timely inform the working status whether it is reliable; the anti-reflective, specular and specular photoelectric switch has the function of preventing mutual interference. Convenience
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