Frequency inverter, more than MCE

The control and regulation of change-speed drives is an essential part of electric drive technology. In industrial applications and building technology, drive systems with frequency inverters already cover a multitude of various requirements.
A large number of industrial drive tasks are realised with asynchronous motors which are connected to the mains either directly or via a star-delta connection.
The energy supply to the machines can only be controlled via an ON-OFF switch. Energy-consuming by-passes or chokes are used to reduce the power output.
These machines can be designed and operated much more efficiently with a frequency inverter. The speed of the three-phase motor is regulated by the voltage applied via the frequency and torque at the motor shaft. Although inverters reduce the efficiency of the conversion of electric into mechanical energy due to their own heat losses, the average efficiency over the entire operating range is better. The additional energy output for the heat loss in the power semiconductors is normally compensated many times over on the mechanical side by energy savings.

The combination of sturdy and practically maintenance-free threephase asynchronous motors and the frequency inverter creates a drive system with a high availability and many advantages.

     • Energy savings
     • Process optimization
     • Noise reduction

The use of standard motors as well as the possibility of the direct mains operation of asynchronous machines enables drives with maximum availability.