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Basics of power engineers: transformer winding process and terminals with the same name The transformer approval letter usually contains electrical Figure, as shown in Figure 1, where the black dot of each winding indicates the same terminal. The so-called terminals with the
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Introduction The traction transformer for coal shearers is located inside the vehicle body, with limited installation space and harsh conditions. When designing, electromagnetic parameters and structural parameters need to be selected on the premise of meeting the specified performanc
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Traditional Y capacitors are mainly in the form of plug-ins. Since Keya launched the JK-ET series of chip Y capacitors, many people have been confused about what the internal structure of chip Y capacitors looks like. How is it different from traditional plug-in Y capacitors? What's the di
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Why does the primary coil of a single-ended flyback transformer need to be connected to a diode? The single-ended flyback transformer is a common circuit design that is widely used in many electronic devices. In this circuit, the primary coil needs to be connected to a diode to ensure the normal o
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Due to the large number of winding layers, the transformer will produce distributed capacitance. When operating at high frequency, these distributed capacitances will have a great impact on the working state of the transformer, such as EMC deterioration, transformer heating, etc. So it's important t
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With the development and innovation of power electronics technology, AC/DC switching power supplies have basically replaced linear power supplies and are developing in the direction of small, lightweight and efficient. At present, switching power supply is an indispensable and key part of the rapid
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The flyback switching power supply is mostly used in the low and medium power range, such as 2w~100w. Basic principle of flyback power supply When the power supply is in a steady state, at the time ton, the MOS transistor Q1 is turned on, and the inductor current of the prima
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The difference between the continuous mode CCM and the discontinuous mode DCM of the flyback switching power supply is mainly reflected in the transformer design. This article expands to explain which technical parameters of the flyback power supply will be affected by DCM. If you wan
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Combined with the schematic diagram, I try to explain the switching waveforms of the voltage and current at each key point of the flyback switching power supply in the steady state of the discontinuous mode DCM, without involving the specific component parameter values.Basic working principle of fly
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When the MOS tube of the flyback switching power supply is turned off, the energy stored in the leakage inductance of the primary winding of the transformer cannot be transferred to the secondary winding, and the leakage inductance of the primary winding and the parasitic capacitance of the MOS tube
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Type of output diodeSecondary winding output diode D1 usually chooses a Schottky diode or an ultra-fast recovery diode, one is because the reverse recovery time trr of these two diodes is short, and the other is because the forward voltage Vf drop of these two diodes is small.If the diode reverse re
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1. EMI regulations and test specifications Full electromagnetic compatibility means that the equipment or system meets the requirements in its electromagnetic environment and does not cause any equipment in its environment Capability of intolerable electromagnetic interference. Table
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