Output voltage limitation method for voltage/frequency regulator for electric motor limits voltage to first and second values obtained from regulator intermediate circuit voltage characteristic and voltage respectively

摘要

The output voltage limitation method has the amplitude of the output voltage vector limited to a first value provided by the maximum voltage divided by the square root of 3 and a second value provided by the intermediate circuit voltage of the voltage/frequency regulator divided by the square root of 3. The first value is obtained from the time characteristic of the intermediate circuit voltage, e.g. using a filter method. An Independent claim for a regulator supplying an electric motor is also included.