Quadrature axis field brushless exciter

Details Quadrature axis field brushless exciter Quadrature axis field brushless exciter

H - Electricity

02

P

310/111, 318/79

H02P 1/52 (2006.01) H02K 19/12 (2006.01) H02K 19/26 (2006.01)

Patent

CA 1074395

ABSTRACT OF THE DISCLOSURE Accelerating a large inertia load by means of a synchronous dynamoelectric machine. During starting, a quadrature axis winding disposed around the stator of a brushless exciter is energized by single phase alternating current. Alternating current excitation is induced by transformer action within the rotor armature winding of the exciter and is applied to the rotor field winding after being rectified by the rotatable rectifier assembly. Poly- phase alternating current excitation is applied to the synchronous dynamoelectric machine stator winding to establish a dynamic magnetic field which rotates at a speed proportional to the frequency of the applied excitation. Interaction of the static agnostic field of the rotor and the rotating stator field produces the mechanical turning force. The frequency of the synchronously applied stator excitation is increased from substantially zero cycles per second to a higher frequency until the rotor member has accelerated synchronously to the desired speed of rotation. -1-

273481

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