The working process of the main circuit of the linear power supply is that the input power supply is initially regulated by the pre-voltage regulation circuit, and then converted into a DC power supply through the isolation rectification of the main working transformer, and then the linear adjustment element is finely adjusted under the intelligent control of the control circuit and the monolithic microprocessor controller, so that it can output a high-precision DC voltage source.
1. Power transformer and rectification: convert 380V alternating current into the required direct current;
2. Pre-voltage regulation circuit: relay components or thyristor components are used to pre-adjust and pre-stabilize the input AC or DC voltage, so as to reduce the power consumption of linear adjustment components and improve work efficiency. And ensure that the output voltage source is high precision and high stability;
3. Linear adjustment element: fine adjust the filtered DC voltage to make the input voltage meet the required value and accuracy requirements;
4. Filter circuit: prevent and absorb the pulsating wave, interference and noise of the DC power supply to the greatest extent, so as to ensure that the output voltage of the DC power supply is low ripple, low noise and low interference;
5. Single-chip microcomputer control system: The single-chip microprocessor controller compares, judges, calculates, analyzes and processes various detected signals, and then issues corresponding control instructions to make the overall voltage stabilization system of DC regulated power supply work normally, reliably and coordinated;
6. Auxiliary power supply and voltage reference: provide high-precision voltage reference and power supply required for electronic circuit work for DC voltage regulation system;
7. Voltage sampling and voltage regulation: detect the output voltage value of the DC regulated power supply and set and adjust the output voltage value of the DC regulated power supply;
8. Compare the amplification circuit: compare the output voltage value of the DC regulated power supply with the voltage of the reference source to obtain the error voltage signal, and carry out amplification feedback and control the linear adjustment element to ensure the stability of the output voltage;
9. Current detection circuit: obtain the output current value of DC regulated power supply for current limiting or protection control information;
10. A driving circuit: a power amplification circuit arranged for driving an executable element;
11. Display: the display of the output voltage value and output current value of the DC regulated power supply.
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1. In addition to the short-circuit protection function of the fuse, the air switch can also realize the overload protection of the circuit.
2. The fuse is a one-time protection device, which must be replaced once it is blown and is very troublesome, so its reusability rate cannot be compared with the air switch. ...
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Tianyi switch - how to use the dual power transfer switch correctly
1. When the power is cut off for some reason and the power supply cannot be restored in a short period of time, the backup power supply must be enabled:
(1) Cut off the circuit breakers of the mains power supply (including the circuit breakers of the control cabinet of the power distribution room, and the mains power cut-off of the dual-power switching box), and pull the double-cast anti-backing switch to the side of the self-provided power supply, ...
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Tianyi button signal light - how to choose and use the button indicator light
How to use the indicator color correctly?
1. The indicator light (also known as the signal light) is mainly used to attract the attention of the operator or instruct the operator to carry out a certain operation in the way of bright indication, and as an indication that a certain state or instruction is being executed or has been executed.
2. General ...
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Where can Tianyi switch - limit switch be used?
daily life
There are many aspects of the use of limit switches, and it is found in many electrical appliances. So what effect can such a simple switch have? It is first and foremost a chain maintenance effect. The most common example is its use in washing machines and tape recorders (video recorders). ...
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Tianyi switch - introduction to the types and characteristics of limit switches
Conventional domestic travel switch
LX19-001/111 in the LX19 series, LXK3-20S/T in the LXK3 series, JLXK1 series JLXK1-111/411/511 in the conventional travel switch are the most representative.
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Tianyi switch - precautions for switching power supply to regulate current
1. Pay attention to stability
When adjusting the output current of the switching power supply, the stability of the circuit must be ensured, otherwise there will be current fluctuations, disturbances and other phenomena, which will affect the normal operation of electronic equipment. Therefore, it is necessary to perform a ...
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Tianyi switch - the difference between switching power supply and linear power supply
(1) The cost of linear power supply is higher than that of switching power supply at a certain output power point.
Therefore, with the development and innovation of power electronics technology, the switching power supply technology continues to break through and innovate.
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Tianyi switch - maintenance of disconnector switch
1) Clean the dust on the surface of the porcelain, check whether the surface of the porcelain is glazed or damaged, whether there are cracks and flashover marks, and whether the iron and porcelain joints of the insulator are firm. If the damage is severe, it should be replaced;
2) Wipe the oil stains on the blades, contacts or fingers with gasoline and check the contact ...
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Tianyi switch - the role of the travel switch (limit switch) and its working principle
The scope of use of the travel switch (limit switch).
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Tianyi switch - what are the differences between limit switches and proximity switches?
First, the characteristics are different
1. Limit switch: The limit switch has the characteristics of small size, multiple functions, high precision, adjustable limit, strong versatility and easy maintenance, installation and adjustment.
2. Proximity switch: The proximity switch has the characteristics of a limit switch, and at the same time has the sensing performance.
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Tianyi switch - what does the 2P3P of the air switch mean
2P means two poles, which means that this air switch has two connection ports, one to connect to the neutral wire and one to the live wire, which is suitable for single-phase circuit connection, or can also be used to connect two-phase power supply in a three-phase circuit.
3P is the meaning of three poles, there are three connection ports, and all of them are ...
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Tianyi switch - the model meaning of the proximity switch is introduced
Unmarked/Z: Inductive/inductive self-diagnosis
C/CZ: Capacitive/Capacitive Self-Diagnosis
N: NAMUR safety switch
X: Analog
F: Hall
V: Reed type
J: Threaded cylindrical
B: Cylindrical
Q: Angular cylindrical shape
...
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Tianyi switch - the characteristics and classification of load isolation switch
First, the characteristics of the load switch
A load switch is a switchgear between a circuit breaker and an isolation switch. It has a simple arc extinguishing device, which can cut off the rated load current and a certain overload current, but cannot cut off the short-circuit current
Second, the classification of load switches
According to the operating voltage ...
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Tianyi switching power supply troubleshooting
1. Check the key points:
1) Whether the voltage at point B is 310V.
2) Whether the 15V voltage is normal.
3) Whether the voltage at point C is greater than 14V.
4) Whether the SS terminal of (8) pin IC6 is higher than 10V, whether the SD terminal of pin (10) is lower than 0.6V, and whether there is a square wave transmission at pin 13 and pin 14 ...
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The LA42V series pushbutton switch is newly launched
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Tianyi switch - the operation precautions of the disconnector switch
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VTeam participated in the 9th China CNC Machine Tool Exhibition
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What are the advantages of Tianyi switch - limit switch?
1. The design is usually simple and straightforward
2. Works well in almost any industrial environment
3. It has high accuracy and repeatability
4. Low-power devices
5. High inductance load can be switched
6. Used to switch multiple loads
7. Simple installation
...
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Tianyi switch - the difference between high-voltage load switch and high-voltage circuit breaker
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