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AssigneeZinser Textilmaschinen GmbH
InventorHorst Wolf
Estimating the term…
In textile machinery wherein two or more loads--such as transport rollers of a tension frame and a bank of spindles carrying take-up spools--are driven by respective three-phase motors of the asynchronous (induction) type at speeds which are different from each other but are to be mutually correlated during an entire operating cycle including a startup and a cutoff period, the motor with the shorter acceleration time is slowed down during startup to let it reach its operating speed substantially at the same time as the other motor whereas the motor with the longer deceleration time is braked during cutoff in order to reach standstill substantially simultaneously with the other motor. The slowdown during startup and the braking during cutoff can be controlled by a comparator which determines deviations of the speed ratio of the two motors from a predetermined reference value.
A process for mutually correlating, during a startup period and a cutoff period, the speeds of two asynchronous alternating current induction motors driving different loads in textile machinery whose speed ratio is to remain at least approximately constant in all phases of operation, said motors having different acceleration times to reach their respective operating speeds with full supply voltage on startup and having different deceleration times to reach standstill after de-energization on cutoff,
In textile machinery including two asynchronous induction motors driving respective loads at different speeds whose ratio is to remain at least approximately constant throughout an operating cycle including a startup period and a cutoff period, said motors having different acceleration times to reach their respective operating speeds with full supply voltage on startup and having different deceleration times to reach standstill after de-energization on cutoff,
Dependencies are inferred from the claim text.