The leakage resonance of the rotor winding (5') in the d-axis (in the radial direction) is at least double the size of the leakage resonance of the damper winding (6) in the d-axis (in the radial direction).

A multiphase permanent magnet motor having a leakage reactance adjustable structure.

The leakage reactance (usually about 5 to 10% of the full load impedance) helps limit both the magnitude and rate of rise of the fault current.

The leakage resistance (typically around 5 to 10% of the total load impedance) helps limit both the magnitude and the rate of increase of the fault current.

The leakage resonance of the rotor winding (5') in the d-axis (in the radial direction) is at least double the size of the leakage resonance of the damper winding (6) in the d-axis (in the radial direction).

A multiphase permanent magnet motor having a leakage reactance adjustable structure.

A setting section (14) sets the reactance of the plurality of variable reactance elements (13).

The said first series reactance ratio is different from the said second series reactance ratio.

For instance, net inductance can be compensated for by turning capacitive banks on and off.

A reactance compensation distribution constant line (31) compensates the reactance (BL, XS) of a load (6).

A reactance value setting part (14) sets the reactance values of a plurality of variable reactance elements (13) for each angle as changed by the angle control part (11).

Of transformers and inductors

A controller (100) changes the directivity of the array antenna by changing the reactance Xn of the variable-reactance element (23).

Of transformers and inductors

The first and second reactance parts (18, 20) have a substantially identical reactance X.