Patent classifications
H
ELECTRICITY
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H02
GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
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H02P
CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
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27/00
Arrangements or methods for the control of AC motors characterised by the kind of supply voltage
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H02P27/02
using supply voltage with constant frequency and variable amplitude
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H02P27/024
using AC supply for only the rotor circuit or only the stator circuit
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H02P27/024

Apparatus and means for progressive motor start based on current derivative synchronisation
09755554 · 2017-09-05 · ·

A method for controlling a switch that controls a power supply line of an electric motor from an alternating voltage source, including determination of a switch closing instant (t.sub.f) starting from a measurement of the derivative of the current carried on the power supply line. A starter system and a computer program product are capable of using this method.