Relative Stability of Electrical into Mechanical Conversion with BLDC Motor-Cascade Control

The conversion of the electrical energy into mechanical is usually realized by a motor, power electronics and cascade control. relative stability (?-stability), i.e., displacement its eigenvalues this system analyzed for drive with BLDC motor. influence changing basic parameters motor supply on operation considered. 4th order closed-loop transfer-function control presented, where boundaries coefficients are used. which uncertainty resistance, inductance, flux gain analyzed. Theoretical calculations control, simulations laboratory tests included in article.