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transformer, can be made into a basic switch power supply. Switching Power Supply linear power supply the main working principle of the switching power
Developers must understand the concept of switching power supply (features of the Power Supply Module) 1. Concept of switching power supply The switching power
. Assume that the output voltage accuracy is ± 2%, then the output voltage lower limit vo1 = 4.9 V, CO = 40000 UF, there are: 0.5 * Co * (Vo2-Vo12) = rjt1 * Po ...... (2) the substitution values can be: T1 = 1 ms. We found that the output capacity of UF is extended, and the power loss duration is only 1 ms! It can be seen that increasing the output capacitor has little impact on the power-down duration. 3.
components such as the bridge-type rectifier to burn out when the current is exceeded. When NTC is used in series on line L or line N, its internal impedance value can limit the current value at the moment of charging at startup, while the negative temperature coefficient is defined as its resistance will decrease as its temperature increases, so as the current flow through the body gradually increases the temperature, the resistance will decrease to
will omit some capacitors and coils, and the weight will be lighter. Second, the Power transformer The key part of the power supply is the transformer, the simple method is to look at the transformer size. General transformer position in the two pieces of heat sink, according to common sense, 250W power transformer
) of the switch device. In the full-bridge circuit, the source-to-source potential difference of different switch devices is very large and changes at high speed. Therefore, the drive circuit must be isolated. The switch power supply adopts a transformer isolation driving circuit. 3 shows that the circuit has simple structure, low cost, high isolation voltage, lo
1. Overview of three types of non-isolated DC-DC topologies 1.1Buck type converter The buck converter topology is shown in Figure 2.2 and the buck Converter is also known as a buck-type power supply topology. When the switching tube s is on, the diode VD negative voltage is higher than the positive reverse cutoff, at which time the current is fed through the inductance L to the capacitance and load, while
less than 36 V, and the Safe Current is less than 10mA. 2. The staff on duty need to remove the barrier for work. The required security distance is 0.7 m for 10 k V, 1.0 m for 35 k V, and 110 m for 1.5 k V, 220 k V at 3.0 m. 3. When thunderstorms require inspection of outdoor high-voltage equipment, insulation boots should be worn, not close to lightning arresters, lightning rods and Grounding Devices. 4. When an electrical device is on fire, the power
voltage rise, through the MOSFET field effect tube switch role, external power supply disconnect, inductance L2 released just filled in the energy, then the L2 inductance will become a power supply continue to the load. With the consumption of energy stored on the L2 inductor, the voltage at both ends of the load is g
One day, I repeatedly started the machine several times, and then pressed the power key, but it didn't respond. After my check, it turns out that the power supply is not working and there is no voltage on all the feet.At first, I thought the fuse was burned out due to frequent start, but I took the power off and saw th
point of the switch to burn out, the rectifier bridge over-current damage, the light will also make the air switch can not close the brake. All of these phenomena will cause switching power supply does not work properly, for this reason almost all switching power supplies are set to prevent inrush current soft start c
1 PrefaceThe modern induction heat treatment technology is widely used because of its high quality, high efficiency, and environmental protection. As the basis of induction heat treatment technology, the IGBT module of the inverter has been commercialized and has successfully produced 10 ~ 100 kHz IGBT inverter power supply with hundreds of kilowatts of power. Pr
Among the many Internet Access Technologies, the emerging Power Line Communication technology is particularly eye-catching. The power supply's online network speed can reach 200 Mbps. This absolute advantage will threaten the Traditional Ethernet access power cord communication technology, the basic principle is to use existing
, battery management system and car body. The motor drive and control system are the core of electric vehicles and the biggest difference between them. During the operation of the above system, the signal collection of the Energy (battery) management system requires a highly isolated b0505 product in terms of power motor drive, our IGBT driver Power Supply qaw an
A Lenovo G31T-LM motherboard, CPU core voltage, reset, PG, North Bridge all power supply is not normal, memory voltage 1.4V significantly lower, and later found that North Bridge power supply is the memory of MOS tube
A search on Google found an ATX switching power supply consisting of TL494 and LM339 At first glance, more than 3842 of the switching power supply to be more complex in fact, as long as the basic circuit has a certain understanding and a certain imagination to understand this circuit is still very easy First introd
The actual motherboard maintenance, often beginners in the measurement of the motherboard of the various power supply voltage, easy to be measured in the actual results of the voltage deviation (whether normal), in this brief description, the general motherboard of the main power supply voltage range and common test po
(1) twists and turns Transformer Phase Shifting technology, inverter rectification side through twists and turns Transformer Phase Shifting and achieve 30 pulse rectification, from the theory of less than 29 harmonic current can be eliminated, the harmonic suppression capability of the variable frequency power supply is greatly enhanced. Because the rectifier bridge
Electronic Circuits Require DC power supply to provide energy. Because the battery cost is high, it is generally only used in low-power portable instruments. Here we will discuss how to convert an AC power supply to a DC regulated power
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