Patent ID: 7372233
Filing Date: 2008-05-13
Classification: H02P

Abstract:
1. A method for operating a dynamo-electrical machine, comprising: a) driving a pair of winding sections of the dynamo-electrical machine by one or more voltage pulses produced by a power stage in a converter circuit, wherein the power stage includes a first transistor connected to a first winding section and a second transistor connected to a second winding section, wherein the voltage pulses are produced by switching the first and second transistors on and off simultaneously, the voltage pulses not producing a rotating field in the dynamo-electrical machine; and b) determining a parameter for the dynamo-electrical machine with a current measurement device in the converter circuit in conjunction with a time detection device and at least one converter for detecting at least one of a current and a voltage, while driving the dynamo-electrical machine, wherein act b) further comprises the acts: b1) measuring a current formed while driving the pair winding sections using the current measurement device in the converter circuit, and b2) determining a time period starting with the driving step and ending when the measured current substantially equals a predetermined current value by using the time measurement device in the converter circuit, the time period being a time parameter for the dynamo-electrical machine.