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Cause analysis of braking resistor used in elevator frequency conversion control
In common variable frequency speed regulation systems, the speed reduction and shutdown of the motor are realized by gradually reducing the frequency. At the moment of frequency reduction, the synchronous speed of the motor decreases, while the rotor speed of the motor d...Read more -
Working principle of water resistance cabinet
Working principle: a special electrolyte is inserted in series into the rotor circuit of the wound motor as the resistance. By adjusting the concentration of the electrolyte and changing the distance between the two polar plates, the value of the series resistance always meets the requirements of...Read more -
Building electrical – why should the neutral grounding point be selected for grounding resistance cabinet
The grounding resistance cabinet adopts neutral point grounding, which can reduce the transient overvoltage during single-phase grounding, eliminate the resonance overvoltage and arc grounding overvoltage, and the relay protection device can quickly select the fault line and cut off the fault poi...Read more -
Development opportunities and potential prediction of new energy and energy storage under the environment of electric carbon market
The establishment of the national carbon market and the continuous improvement of the power market bring new opportunities to the development of new energy and energy storage, and deconstruct the core values and corresponding market space of new energy and energy storage. The core viewpoints are ...Read more