Sensorless Control

26. September 2011

New: Sensorless speed control from standstill for synchronous motors

CC-75-500Celeroton has launched the newest version of its electronic converter CC-75-500. This is the world’s first converter that allows for sensorless control of permanent-magnet synchronous machines (PMSM) and brushless dc motors (BLDC) up to 1 million rpm – and this from standstill.

The integrated pulse-amplitude modulation (PAM) drives BLDC and PMSM, commonly used in dental- and medical tools and machining spindles, at higher rotational speeds with minimal losses in stator and rotor. Due to the sensorless speed control, Hall sensors can be completely omitted, even for speeds below 10 % of the nominal speed where standard converters would usually require a position feedback sensor. This results in a simplification in the motor design and less cables and connectors, with a resulting increase in reliability.

Celeroton’s technology allows for highly compact drive systems with highest maximal rotational speeds and full torque at low speeds in various applications. And all this without encoders or Hall sensors!

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