Digital control device for an inverse rectifier

Details Digital control device for an inverse rectifier Digital control device for an inverse rectifier

H - Electricity

02

P

318/115

H02P 3/18 (2006.01) H02M 7/529 (2006.01)

Patent

CA 1205517

ABSTRACT The invention relates to a digital control device for an inverse rectifier, particularly for driving an A.C. motor operable at a variable frequency, comprising a pulse generator producing timing pulses at a multiple of the inverse rectifier frequency, a location counter controlled by the timing pulses, a control store having at least two storage zones occupied by different controlling tables of which the data characterise the periodically changing signal pattern for the ignition and extinction signals of the controlled switching elements of the inverse rectifier, and a table selecting apparatus which, depending on setting and operating parameters, delivers a preparatory selecting signal for the desired control table and, after a change in this selecting signal, appropriately switches the storage zone over.

450873

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