A spinning machine, especially a ring spinning frame, includes at least one driver started via one frequency converter and one central control unit for starting the frequency converter.
Discussion of resuming automatic restart function while high voltage frequency converter is power off
The paner intrdue the application of frequency converter in improving crude oil Stabilization unit and it's operating situation.
Based on the static characteristics of induction motor, this paper analyzes the braking function of general voltage vector controlled frequency converter.
It can be used in pipe installation buffer type check valve or pump motor use frequency converter and method of soft starter control to reduce the water hammer effect.
one-out-of-eight audiovideo frequency converter
The frequency converter consists of main circuit and control circuit.
Application of CROWBAR in AC frequency converter drive system for rolling mill
The principle of the frequency converter reaches, its function and its saving energy reconstruction were introduced and discussed.
These high frequencies correspond to the rotation speeds of centrifuges; America tightly controls the export of frequency converter drives able to operate at frequencies above 600 Hz.
As the result of simulation, it is pointed out that the converting point must be carefully chosen when corner folding modulation method or intermediate pulse displacement method is used to convert the output voltage waveform of high power frequency converter into square waveform.
With this technique, the effect of equivalent high switching frequency converter has been obtained with low switching frequency converter.
Siemens PLC S7-200 as the control center, Anchuan F7 frequency converter as the implementation devices, it realizes changing frequency velocity modulation control for automatic washing machine.
Two-step drive device make the force-enduring reasonable, and the frequency converter control the motor, it is easier to adjust the speed of spindle.
Application of frequency converter on modern weaving machinery
Application and study of frequency converter in energy saving technique of heating boilers;
The speeds of adhesive-binding& adhesive-wheel can get adjustable speed out of grade control by the frequency converter according to the need of arts& crafts.
A design and test of 2cm up-frequency converter
The application of frequency converter in powder dryer system based on variable frequency speed control of powder inverter, powder ventilator and smoke ventilator are presented in the paper.
At the same time, the automatic energy-saving mode frequency converter LG, can make the motor in the meet load torque requirements to minimum current operation, to reach better energy saving effect.
Application of PLC in the speed control system of frequency converter in the main hoist of blast furnace;
The theoretical circuit,gain and selectivity of the regenerative frequency converter;
Common fault analysis and preventive measures of frequency converter
The testing system was mainly composed of PLC, MMI, frequency converter, approach switch and acceleration transducer.
The principle of in frequency converter using large high-voltage power electronic device IGBT was discussed. And the cause of fault was analyzed as well as the lesson should be learned.
The insulation class F or class H . The insulation of open-loop U/f condition of . structure has the adaptability to high carrie frequency voltage supplied by frequency converter .
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