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Method and device to determine a current fundamental harmonic space vector from a measured stator current space vector
Method and device to determine a current fundamental harmonic space vector from a measured stator current space vector
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机译:从测量的定子电流空间矢量确定电流基波谐波空间矢量的方法和装置
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摘要
The invention relates to a method and a device (14) for determining a fundamental current space vector (is1) of a measured stator current space vector (is) of a converter-supplied induction machine (2). According to the invention, a harmonic-model current actual vector IMAGE is determined as a function of a control voltage vector (u*s1) and of a measured stator voltage space vector (us), which harmonic-model current actual vector is automatically adjusted in accordance with a harmonic current actual vector (iosw) as a function of a proportionality factor (k) which is calculated from the harmonic-model current actual vector IMAGE and from a fundamental current space vector (is1). A fundamental current space vector (is1) of a measured stator current space vector (is) can thus be detected quickly, with a high frequency bandwidth, in converters having a low switching frequency. IMAGE
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