The Fast One

Highest speeds, lowest motor heating and best control performance – always in real time: The technical basis is the controlled intermediate DC circuit combined with the established pulse-width modulation (PAM) which allows SD2S doing without additional motor chokes even at high speeds. Based on this technology SIEB & MEYER developed two extremely robust and sensorless control methods: V/f-PAM for asynchronous motors and FPAM for synchronous motors. Parameter setting is very simple for both methods and only few motor data is needed to complete the configuration.

The existing standard SD2S-FPAM devices are also used as technical basis for customized devices. This way, the customer obtains an optimal solution that is individually adapted to the specific application.

Function - Advantage - Benefit

Output frequencies up to 8,000 Hz

Function: Established PAM technology with optimized dynamic characteristics, efficiency and flexibility.
Advantage: Virtually no speed limitation combined with optimized control dynamics and excellent system efficiency.
Benefit: Low initial costs, possibility to access new applications.

Sensorless control of synchronous and asynchronous motors

Function: The control of synchronous motors (FPAM) is based on the accurate EMF measurement in accordance to the rotor position. For asynchronous motors the well-proven drive function V/f-PWM is used.
Advantage: Cost-intensive speed sensors are not required. Flexible switching from synchronous to asynchronous motors is possible.
Benefit: Cost savings, easy initial operation.

No need of motor chokes or LC-filters

Function: The PAM technology allows smallest switching frequencies and reduces the electric stress of the motor as well as interferences (EMC) significantly.
Advantage: Additional filter elements or motor chokes are not required.
Benefit: Low system costs, easy initial operation.




Block Diagram

Block diagram SD2S-FPAM