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AC drives control the speed of the induction motors and the speed of the synchronous motors by adjusting the motor feed frequency. AC drives include: Speed Adapters (ASDs), Frequency Adjustments (AFDs), Variable Frequency Drives (VFDs), Variable Speed Drives (VSDs or All Frequency Converters) are also known as AC motors using electromagnetic induction They convert electrical energy into mechanical energy.
AC motors have a constant speed, which is determined by the frequency of the feed as well as the constant torque.
Certainly speed is not suitable for all processes and applications and it is necessary to adjust the speed as needed.
applications:
Process control and reduced power consumption are two primary reasons for using AC drives. AC drives were originally designed to control the process, but reducing power consumption is just as important.
Motor speed regulator (remote control)
Remote switch easily without the need for a contactor
Turn the engine on and off without having to disconnect the main power supply
Reduce mechanical impact and thus extend the useful life of the mechanical part
Protect motor against voltage surge and prevent motor damage
Starting the engine smoothly without damaging the mechanical parts such as couplings, box clamps, belts, chains and so on will increase the useful life of the engine and other mechanical parts.
Motor overload protection; In this case, if the motor load exceeds the standard limit, the inverter turns off the motor and shows the user an overload message.
Avoid heating up and eventually burning the engine in applications where the engine is constantly turning left or right on or off.
Advantages:
Significant energy savings
Optimize control steps
Reduce service and maintenance requirements
Upgrade system operation
Smoother performance
Acceleration gain control
Compensation for changes in process variables
Possible slow (slow) operation for Setup
Adjust production speed
Accurate location
Torque or Tension Control
Using them for remote control of motors has many advantages, the most important of which are:
2- No need for mechanical discharge control devices.
1- Energy saving up to 5%
2- No startup shock.
Increase the useful life of mechanical components.
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