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Harmonics have many very harmful effects on electronic equipment. A common symptom of harmonics is overheating wires and furnace transformers, causing circuit breakers to trip when they shouldn't. Harmonics are classified by name, frequency and order. The name usually refers to whether the harmo
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Resonant transformers can effectively suppress high-frequency harmonics in the power system, thereby reducing electromagnetic interference in the power system and improving the stability and reliability of the power system. In addition, the resonant transformer can also effectively suppress low-freq
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"Zhongtai PLC Automation Teaching" brings you the wiring method of sensors and PLC. Twenty wiring diagrams, aren't they super rich? Come and see it together! Special thanks go to "Zhongtai PLC Automation Teaching".1. Overview 01The digital input interface of PLC is not compli
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The national standard stipulates that three-phase asynchronous motors are not allowed to start directly under the following two circumstances:① The rated capacity is greater than 7.5kW;② When the motor is powered by a special transformer, The capacity is greater than 20% of the transformer capacit
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Experimental principles of three-phase bridge type fully controlled rectification and DC motor speed regulation The three-phase bridge type fully controlled rectification circuit can use a trigger to control the conduction of the rectifier, thereby changing the direction and magnitude of the curren
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Causes of transformer surge current Transformers play a role in electrical systems It plays an important role and its working principle is to transfer electrical energy from one circuit to another through mutual inductance. When the transformer is reconnected or disconnected from the
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In power supply design, we often hear the word leakage inductance. So what is leakage inductance and what impact does it have on the power supply?1. What is leakage inductance?In a transformer or coupled inductor, it is generated by the primary winding and cannot be coupled to Part of the magnetic f
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Overvoltage protection. The power supply provides stable power to external devices. Each device will have a maximum allowable voltage during normal operation. When the voltage provided is too high, the device will be damaged within a certain period of time, so power supply overvoltage protection is
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1 Rectified power supplyThe principle of rectified power supply is to use the unidirectionality of diodes to convert AC into DC.Commonly used rectified power supplies include single-phase half-wave rectifier circuits, single-phase bridge rectifier circuits, three-phase rectifier circuits and their w
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Absolutely not! Due to its high energy density and special chemical properties, lithium batteries must use a power management chip, that is, a charger IC, for safety and life considerations. ); In addition, the charging chip can optimize the charging curve to the greatest extent, and combined with t
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Today I want to write this article to share a knowledge point I learned some time ago - the derating curve of the power module.Why write this? For students who specialize in power supply, it must be very simple. But for someone who is not in the power supply industry, it may not be completely clear
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1. EMC characteristics of FLYBACK The voltage oscillation peaks and current oscillation peaks formed by the switching power tube of FLYBACK (flyback converter) at the turn-on and turn-off moments are the main sources of interference in switching power supplies. , plays a decisive role
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