In daily production activities, ordinary production workshops have harmonics, voltage instability, overcurrent, etc. The motor is easily damaged and production is affected. This is where the frequency converter comes into play.
Frequency conversion speed regulation and energy saving
Frequency converter speed regulation and energy saving are mainly reflected in the application of fans and water pumps. In order to ensure reliability in actual production, a certain margin is left when designing various production machinery with power drives. Save energy by reducing motor speed when full speed is not required during production
Soft start
When the motor is started directly through the power frequency, it will produce 7 to 8 times the rated current of the motor. This current value will greatly increase the electrical stress on the motor windings and generate heat, thereby reducing the life of the motor and causing a great impact on the power grid. The variable frequency speed regulation can start at zero speed and zero voltage (torque boost can also be added appropriately). Once the relationship between frequency and voltage is established, the inverter can drive the load to work in V/F or vector control mode. The use of variable frequency speed regulation can fully reduce the starting current, improve the winding endurance, reduce the impact of the starting current on the motor and the power grid, and extend the service life of the motor. At the same time, it will not cause the problem of excessive peak-to-valley differences that cause voltage in the power supply network. Sensitive equipment malfunctions, trips or works abnormally.
Control simplified
The variable frequency speed regulation can start at zero speed and accelerate evenly according to the user's needs, and its acceleration curve can also be selected. The running speed can be adjusted at any time as needed and can be quickly changed according to the process. Speed changes can also be achieved through remote control PLC or other controllers, thereby simplifying control.
Reduce mechanical wear and tear
In variable frequency speed regulation, the stopping method can be controlled, and there are different stopping methods to choose from (deceleration stop, free stop, deceleration stop + DC braking), which reduces the impact on mechanical components and motors, thereby making the entire system more reliable. Improve system stability.
With the development of industrial electrical automation technology, the use of frequency converters will become more and more widespread, the role of frequency converters will be further improved, and the status of frequency converters will also become greater and greater.
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