RUN AT FULL SPEED WITH US
TURBO MACHINES
When it comes to high-speed motors, the name says it all: 100,000 revs per minute and more are not uncommon here. KEB Automation’s drive solutions offer maximum precision and reliability in high-speed applications. In turbo blowers and radial compressors, not only do they ensure top performance, they also increase energy efficiency.
Turbo blowers and radial compressors generate significant energy savings in sewage treatment or power plants. They are also in demand in the area of high-vacuum technology or in turbo molecular pumps where it is essential to ensure extremely precise drive control.
This is necessary, especially at the high speeds at which the turbo blowers and radial compressors operate, in order to keep the heat generated by the high-speed motor under control at all times. KEB makes this possible with its COMBIVERT F6 drive controller. Building on applications in the area of process technology, the F6 offers the required performance through high switching frequencies of up to 16 kHz and output frequencies of up to 2000 Hz. It is also flexibly adaptable thanks to a wide range of configurable, sensorless safety options, encoder interfaces and efficient cooling concepts.
The Z2 sine wave filters, which are coordinated with the F6 and are specially designed for use at higher frequencies, provide protection against overheating, reduce EMC stress and thereby increase the service life of turbo blowers and radial compressors.
Kevin Schneider
Team Manager Customised Pumping Solutions
Pfeiffer Vacuum GmbH
KEB’s drive controllers take over challenging drive tasks so that machines and systems can operate with utmost efficiency. Cutting-edge, technical solutions ensure that they “keep a cool head” at all times. With its air, liquid and oil cooling systems, KEB offers three different cooling technologies which make the drives highly scalable and allow them to be used easily in various applications. Not just the cooling options, but also the way they are fitted provide machine and system operators with a high level of flexibility. In addition to control cabinet installation, the cooling systems can also be implemented as a push-through version.
Harsh ambient conditions can attack the electronic components inside machines and systems, causing permanent damage. This is where the optional 3C3 protective coating (IEC/EN 60721-3-3 Class 3C2) comes into play on the printed circuit boards of our drive controllers. Adapted to the environmental demands, the coating provides protection and prevents defects and unwanted downtimes. Overall, the service life of inverters is extended – with positive impacts on the operating costs.
ASCL (Asynchronous Sensorless Closed Loop) and SCL (Sensorless Closed Loop) are proven sensorless control methods developed by KEB Automation. They are advantageous in situations where high output speeds usually make it very difficult or even impossible to attach a sensor. Suitable for asynchronous, synchronous, reluctance, linear, spindle or torque motors, these methods ensure optimal and precise control and sensorless positioning – and are also inexpensive and easy to install. The underlying software contains coordinated virtual motor models.
KEB Z2 output filters have been specially designed for use at high frequencies. The use of a special core material as well as the HF wires of the windings developed especially for KEB guarantee a configuration with very low losses (η > 0.99). This increases the overall efficiency of the drive train. In critical cases, the use of a KEB Z2 sine wave filter makes it possible to operate a medium-frequency motor on a drive controller. An added advantage is that direct operation of the motor on a drive controller can cause the stator and rotor to overheat. Sine wave filters address this precise issue, preventing demagnetisation and therefore destruction of the motor.
