Instruments and Systems: Monitoring, Control, and Diagnostics Annotation << Back Complex equations of transition processes of DC motor with three-phase symmetrical excited by the rotor D.K. KOKHREIDZE The complex equations of transient processes for instantaneous values of the variables of DC motor with a semiconductor bridge switch on stator and three-phase field winding on rotor are obtained. The excitation winding is powered by a DC voltage source. The circuit changers are controlled by the sensor signals. The law of semiconductor switches control provides asynchronous or synchronous rotation of the motor rotor relative to the stator magnetic field. From the complex equations of motor would be set up equations in scalar form for the solution on a computer. At a constant rotational speed of rotor is obtained an analytical solution for the current of stator in the transition process. The processes are considered at instantaneous switching of the commutator with the taking into account initial values of the rotor current at the beginning of switch time each interval. An expression of the electromagnetic torque of motor for the study of electromechanical transient modes is obtained. Static and dynamic properties of the machine give the possibility to apply it in the multi-purpose electric drive. Keywords: commutator, thyristor, sensor, switch, moment. Contacts: E-mail:dkokreidze@mail.ru Pp. 17-23.