| 摘要 |
FIELD: electrical engineering. SUBSTANCE: invention can be used to control electric drives in machine building, in automatic control systems, in various servo systems, robotics, sound recording and replay, etc. It ensures uniform and stable rotation of driving shaft within wide range of rotational speeds, unambiguous between specified and actual speed of rotation of rotor, enhanced stability, speed of response and efficiency. Method includes formation of command and control signal in the form of two phase-shifted variable electric voltages and feedback signal with subsequent conversion of control signal into controlling magnetic field acting on working magnetic field of rotor, formation of first correction signal by conversion of feedback signal into periodic signal with oscillation frequency equal to present value of rotation speed of driving shaft, formation of second correction signal by phase shift of firstly correction signal through constant angle, setting of frequency of voltages equal to preset speed of rotation of driving shaft of rotor. In this case, value of first variable voltage is diminished by value of first correction signal and value of second voltage is decreased by value of second correction signal. EFFECT: provision for uniform and stable rotation of driving shaft within wide range of rotational speed. 1 dwg |
