The motor starter is a special electronic device whose main function is to control the current before starting the motor within an acceptable range to ensure the normal operation of the equipment. This article will briefly introduce the working principle, classification and application fields of mot
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
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
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
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,
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