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Triode is a semiconductor device, which is commonly used in electronic circuits as an amplifier and switching element. The triode has three electrodes: base (B), emitter (E) and collector (C). In the electronic circuit, the current from emitter to collector can be controlled by applying appropriate voltage between the base and emitter, so as to achieve amplification and switching functions. About the meeting of triode circuit base and emitter parallel connection The reason for a resistance can be explained from the following aspects: reason one: when the stable operating point is in the DC operating state, in order to make the triode work reliably in the amplification area, it is necessary to connect a resistance between the base and emitter to form a base emitter bias circuit. This resistor
Date: May 23, 2024 Reading: 729
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parallel connection Capacitors are widely used in power systems and electronic circuits for filtering, power factor correction, energy storage, etc. However, in practice, parallel connection Capacitors are prone to resonance problems, which may lead to circuit performance degradation, or even equipment failure. This article will discuss in detail parallel connection Causes, influences and solutions of capacitor resonance. one parallel connection Basic principle of capacitor resonance a Resonance is defined as that under a certain frequency, the inductive reactance and capacitive reactance in the circuit are equal, resulting in the minimum or maximum total impedance of the circuit. stay parallel connection In the case of capacitance, resonance is usually the result of interaction with inductive elements. b. Resonant frequency Resonant frequency (f_r) is determined by
Date: May 21, 2024 Reading: 727
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IGBT driver is an electronic device used to drive insulated gate bipolar transistor (IGBT). IGBT is a power semiconductor device, which combines the input characteristics of MOSFET and the output characteristics of DAC7564IAPW bipolar transistor. direct parallel connection It refers to directly connecting multiple IGBT drivers and running them in the same system. direct parallel connection Multiple IGBT drivers can bring some advantages: 1 Improve system reliability: direct parallel connection Multiple IGBT drives can increase the redundancy of the system. Once a drive appears
Date: April 26, 2024 Reading: 701
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When it comes to the series connection and parallel connection The calculation method of their total inductance (total inductance) is similar to that of resistors, but it is necessary to pay attention to the mutual induction (coupling) that may exist between inductors. Here, we first assume that there is no mutual induction between BUK7275-100A inductors. They are ideal inductors. Inductance in series When two or more inductors are in series, the current on each inductor is the same, and the voltage is distributed in proportion. The total inductance of the series inductor L_total is the simple arithmetic sum of the inductance values L1, L2,..., Ln of each inductor: L_total=L1+L
Date: April 24, 2024 Reading: 697
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In the filter circuit parallel connection The main component of is FQT13N06LTF capacitor. This configuration takes advantage of the characteristics of capacitors in AC circuits, that is, the capacitive reactance increases with the decrease of frequency, thus presenting a low impedance path for high-frequency interference signals and a high impedance path for DC or low-frequency signals. In this way, high-frequency interference signals can pass through parallel connection The DC or low-frequency signal mainly flows through the load. This configuration is very common in power filter, signal processing, noise suppression and other circuit designs. The purpose of the filter circuit is to remove noise, clutter or other unwanted frequency components from the power signal. There are many different frequencies in the power signal
Date: March 5, 2024 Reading: 774
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Relay is a kind of electrical equipment widely used in industrial control system. It can realize signal conversion, amplification, switch control and other functions in the circuit. In relay applications, relay coils are often seen parallel connection The design of diode plays a vital role in improving the stability of the circuit and protecting circuit components. This article will analyze the relay coil parallel connection The function of diode and the importance of this design in the electrical control system. When the relay coil is energized, a magnetic field will be generated in the coil, which will increase or decrease with the change of current. If the current is cut off suddenly, the magnetic field will disappear rapidly. According to Faraday's law of electromagnetic induction, the change of
Date: 2024-2-27 Reading: 711
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In TL072CP closed-loop amplifier with capacitance feedback, capacitance and resistance parallel connection Its function is to control the frequency response and gain stability of the amplifier. Specifically, capacitance and resistance parallel connection This network is called capacitance feedback network. It can adjust the gain and frequency characteristics of the amplifier by feedback part of the output signal of the amplifier to the input. The function of the capacitive feedback network can be explained from the following aspects: 1. Frequency response adjustment: The capacitive feedback network can change the frequency response of the amplifier by adjusting the capacitance and resistance values. The value of capacitance and resistance determines the cut-off frequency of the capacitor feedback network, thus determining the low frequency and high frequency response of the amplifier. Through reasonable selection of capacitance and
Date: September 18th, 2023 Reading: 458
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In the IC chip design, the power supply pin parallel connection Small capacitors are used to provide stable power supply, reduce power noise, and improve system performance and reliability. The following will describe in detail parallel connection The function of small capacitance. 1. Suppression of power supply noise: During the operation of IC chip, power supply noise will interfere with it, resulting in instability, noise, timing offset and other problems of TPS2069CDBVR chip. parallel connection Small capacitors can provide a low impedance path to drain power supply noise to the ground, playing a role in restraining noise. Capacitors have low impedance characteristics, which can absorb high-frequency noise and reduce the interference of power supply noise on the chip. 2. Provide stable power supply: in the IC chip workers
Date: September 5, 2023 Reading: 394
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Series PI regulator and parallel connection Type PI regulators are two forms of PID controllers commonly used in control systems. They have some differences in structure and performance. The two regulators will be compared below. 1. The structure of cascade PI regulator (also called cascade PI regulator) is to connect one PI controller in series with the output of another PI controller. That is, the output of the first PI controller is used as the input of the second PI controller. parallel connection Type PI regulator (also known as parallel connection Type structure) is to combine the output of one PI controller with the output of another PI controller parallel connection 。 That is, the outputs of the two PI controllers are simultaneously used as the control system
Date: July 17, 2023 Reading: 1109
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parallel connection Capacitor is a kind of common power equipment, which is mainly used to improve power factor and voltage stability of power system and improve power quality. Its structural principle and factors affecting operation safety are as follows: I parallel connection Structure principle of capacitor: 1. Capacitor element: parallel connection The core component of the capacitor is the capacitor element, which usually uses AT89S52-24JU aluminum electrolytic capacitor or metallized polypropylene film capacitor. These components have the characteristics of high capacitance, low loss, high insulation strength, and can provide stable capacitance and voltage performance. 2. Insulation material: parallel connection The insulation material of capacitor is usually polyethylene or polyvinyl chloride and other polymer materials, with good insulation performance and
Date: June 5, 2023 Reading: 601
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In power system, harmonic overload is a common problem. Harmonic refers to the component in the power grid whose frequency is an integral multiple of the fundamental frequency (50Hz or 60Hz). When harmonic components increase, they will have a negative impact on power equipment and systems. These impacts include power loss, equipment life reduction, power system instability, etc. Wherein, harmonic overload parallel connection The influence of capacitor is particularly obvious. This article will introduce some prevention measures parallel connection Measures for capacitor overload due to harmonics. 1. Increasing the impedance harmonic component will increase the current of the capacitor, which will lead to the overload of the EPCS16SI8N capacitor. In order to reduce the overload of the capacitor, a certain impedance can be added between the capacitor and the load
Date: May 30, 2023 Reading: 591
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Relay 1N4148 is an electrical switchgear, which is commonly used to control high voltage or high current loads in the circuit. When using relays, it is sometimes necessary to parallel connection Diodes to protect the circuit, so why do you do this? 1. Prevent the peak voltage of inductive load in the control circuit. Inductive load (such as motor, coil, etc.) is often used. When the relay cuts off the circuit, the back EMF generated due to the existence of inductance will make the voltage on the inductive load rise instantaneously, exceeding the rated voltage of the relay, thus damaging the switch contacts of the relay. and parallel connection The diode can form a bypass to guide these voltage peaks to the diode and protect the switch contacts of the relay. 2. Prevention relay
Date: May 26, 2023 Reading: 625
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parallel connection Capacitor is one of ADS1232IPWR capacitors commonly used in power system, which has the advantages of stabilizing voltage, improving power factor, reducing line loss, etc. However, if you do not pay attention to safety during use, it may cause electrical accidents and affect the normal operation of the power system. I parallel connection Principle of capacitor parallel connection Capacitor refers to connecting multiple capacitors together to play the role of capacitor. stay parallel connection In the capacitor, each capacitor can store charge and filter the current in the circuit. When the current flows in the capacitor, the capacitor will filter out the high-frequency component of the current to achieve the filtering effect. parallel connection The
Date: May 23, 2023 Reading: 381
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1、 LDO (Low Dropout) is a low dropout linear regulator, which can convert high voltage power supply into stable low voltage output. LDO has the advantages of simple circuit, low cost and good output voltage stability, but its disadvantage is low efficiency, because it needs to consume a large amount of power supply voltage to maintain a stable output voltage. 2、 Why use diodes parallel connection The low efficiency of LDO is a fatal problem, especially when high current output is required. To improve efficiency, you can use parallel connection Diode. 3、 Diode parallel connection Principle diode of LDO parallel connection The principle of LDO is through IR2110ST
Date: May 9, 2023 Reading: 300
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This is usually used to measure the time, frequency and voltage of the detector. BNC interface is located at one end of the oscilloscope. If there is no BNC interface, directly input a signal in the oscilloscope through two lines, you will find this distortion. In order to reduce the influence of the circuit under test, oscilloscopes usually have high input impedance. This is the right arm of electronic engineers. Playing with oscilloscopes is a necessary skill for us. This is usually used to measure the time, frequency and voltage of the detector. The ancient people taught us not only why, but also why. Therefore, just playing games is not enough. Understanding how the probe works is especially important for better use of it. Next, prbte
Date: September 27, 2021 Reading: 1039
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Product details: BQ25980 is an 8A battery charging solution with a peak efficiency of 98.6%. It uses a two-phase switched capacitor architecture for two lithium-ion batteries. The switched capacitor architecture allows the cable current to be half of the charging current, thus reducing the cable power loss and limiting the temperature rise. The dual phase architecture improves charging efficiency and reduces input and output capacitance requirements. When used together with BQ25790 and other main chargers, the system can realize fast charging from pre charging to constant current (CC), constant voltage (CV) and terminated extremely low power loss. BQ25980 also supports 7
Date: September 6, 2021 Reading: 987
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Due to the rationality of the operation, it is usually the parallel operation of multiple transformers (including two parallel operation) or split operation. If two transformers parallel connection When the transformer ratio difference exceeds the specified range, when the primary voltage of two transformers is equal, the secondary voltage is not equal, and the in-phase potential difference increases, parallel connection A large circulating current will be generated, which will cause power loss or even burning of the transformer. For the substation, it is particularly necessary to consider the operation economy of transformers, especially multiple transformers. Due to the rationality of the operation, it is usually the parallel operation of multiple transformers (including two parallel operation) or split operation. transformer parallel connection Line condition 1. The capacity ratio of transformer is 3:12. The transformer has
Date: 2021-1-24 Reading: 3956
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Look at all parallel connection At present, there is no obvious difference between domestic and foreign enterprises of traditional industrial machinery in the development trend of robot sales market. But for the first time, Bokent applied the synergetic series structure to parallel connection Robot greatly improves the limitation of indoor space for installation. Dong Guangyu said that in order to better parallel connection Robots are integrated into a large number of industrial production scenarios, and must be upgraded on raw materials. As the title sponsor of the new scene positioning ceremony, Dong Guangyu, the director of Bokent Research Institute, issued a speech entitled "Technology Driven New parallel connection Robot Evolution ". From the perspective of technological innovation and independent innovation, he analyzed how to create a brilliant domestic famous parallel connection Robot brand. Throughout
Date: December 29, 2020 Reading: 4571
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Leakage circuit breaker cannot parallel connection use. Because the current flowing through each time cannot be equal, it will produce current difference, which will make the current passing through the zero sequence current transformer unbalanced and cause the residual current circuit breaker to act. If only one residual current circuit breaker of two circuit breakers acts, all the current flows to the other residual current circuit breaker. If this residual current circuit breaker is not equipped with overload protection, it will be burned out.
Date: June 5, 2014 Reading: 996
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Recently, Vishay Intertechnology, Inc. launched a new power metal strip with 5515 size packaging ® meter parallel connection Resistance, the device has 3W power and ultra-low resistance value as low as 100 µ Ω. The WSMS5515 instrument parallel connection The resistance adopts the proprietary process technology that can produce 100 µ Ω~500 µ Ω ultra-low resistance value. This technology can be used in ammeters for industrial and civil electronic ammeters parallel connection The application provides more
Date: January 25th, 2008 Reading: 1354
