METHOD FOR CONTROL OF DC ELECTRIC MOTOR EXCITATION FLUX Russian patent published in 2012 - IPC H02P7/28 H02P7/282 

FIELD: electricity.

SUBSTANCE: in accordance with the method for control of DC electric motor excitation flux the preset magnitude of the thyristor converter rectified EMP is reduced by a preset value. Reduction of the preset magnitude of the thyristor converter rectified EMP is performed at the moment of supply of a signal for acceleration of the electric motor under load. Upon expiry of the electric motor current transient process time (determined from the relation t₃=t₀+a² T_t where a is the ratio of the speed and current loops time constants, T_t is the current loop time constant) the rectified EMP magnitude is increased to the rated level.

EFFECT: ensuring the minimum possible margin of the thyristor converter rectified EMP alongside with preservation of high dynamic properties and reliability indices of the electric motor and a high power factor in the stabilised mode of on-load operation.

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