SPEED CONTROL METHOD FOR DC MOTOR Russian patent published in 1995 - IPC

FIELD: automated electric drives. SUBSTANCE: method involves measurement of motor armature instant current to determine voltage drop across armature active resistance, addition of result obtained to measured value of instant voltage across motor armature, and variation of armature current according to error value; internal voltage of motor is found within conducting interval of valve-type transducer as soon as armature current rises to its maximum; emf value is entered in retrieval-storage unit whose storage element is connected at beginning of conducting interval; emf data are read off during mentioned moment of time. EFFECT: improved accuracy of control; reduced static error of control. 2 dwg