The invention discloses a full-order-observer speed-sensor-less
control system based on weighted errors. The full-order-observer speed-sensor-less
control system comprises a SVPWM, an
inverter, IM, two Clark modules, two Park modules, a reverse Park module, a full-order observer, a first
comparator, a second
comparator, a third
comparator, a first
regulator, a second
regulator, a third
regulator and a slip calculating module;
voltage values output by the
inverter are collected and converted, then the u<alpha> and the u<beta> in a two-phase static coordinate
system are obtained, and then the
voltage values are converted by the Park modules into the u<d> and the u<q> in a synchronous rotating coordinate
system; IM three-
phase currents are collected, are converted by the Clark modules into the i<s alpha> and the i<s beta> in the two-phase static coordinate
system and then are converted by the Park modules into the i<sd> and the i<sq> in the synchronous rotating coordinate system; the current i<s alpha> and i<s beta> and the
voltage u<alpha> and u<beta> are input through the full-order observer to obtain the estimated electric angle speed; then a series of comparing and regulating operations are carried out, the input voltage is subjected to
space vector pulse width modulation through the SVPWM module, PWM
waves are output to the
inverter module, and the inverter drives the IM. Thefull-order-observer speed-sensor-less
control system based on the weighted errors has the advantages that the problem that a traditional speed-sensor-less driving system is instable in
low speed is solved, and meanwhile the low-speed running performance of the system is improved.