What does synchronization of a synchronous motor mean?

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For asynchronous motors, slip is a necessary condition for motor operation, that is, the rotor speed is always smaller than the speed of the rotating magnetic field. For synchronous motors, the magnetic fields of the stator and rotor always maintain the same pace, that is, the rotation speed of the

How to read analog values from Mitsubishi PLC? How to obtain analog quantities by PLC

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We all know that PLC is the core device in the field of industrial control, and it is widely used in the field of control. The industrial control devices I use in my daily work include frequency converters, touch screens and PLCs. PLC is the industrial control product I have the most contact with. I

The Purpose and Method of Current Transformer Demagnetization

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According to the national metrology standards, metrological grade transformers must be demagnetized before measuring errors. The error is not accurate if it is not demagnetized. The main reason is that the iron core has residual magnetism.When the current suddenly decreases, the transformer core is

Ground resistance measurement principle and measurement method

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1. What is ground resistance?Ground resistance is the resistance encountered when current flows from a grounding device to the earth and then flows through the earth to another grounding body or disperses to a distance. It includes the resistance of the grounding wire and the grounding body itself,

What is ferromagnetic resonance overvoltage?

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There are a large number of "energy storage components" in the power system, which are capacitors that store electrostatic energy and inductors that store magnetic energy. These components form various oscillation loops. During normal operation, these oscillation loops are damped or shunte