A technology which uses electromotive force (EMF) signals to predict rotor position within a drive has been developed by US company Semipower Systems Inc (SSI).
SSI’s IndexBlok system could replace clutch brakes, mechanical indexers, stepper motor systems and servo systems.
The IndexBlok drive is sensorless, using an algorithm to position the rotor based on the EMF signals. The position of the rotor is fed to the proportional, integral and derivative servo system within the drive.
Indexblok systems can drive any permanent three-phase motor, including direct drive and linear motors.
The development should lead to cheaper and more reliable drives. `Eliminate components and you lower costs,’ said Dan Jones, vice-president of US-based drives consultancy Motion Media Group.
`You also need fewer leads to connect internal drive components, giving better reliability and less susceptibility to noise,’ he said.
Copyright: Centaur Communications Limited