Abstract: An improved SVPWM( Space Vector Pulse Width Modulation) control algorithm is proposed for the oil
field three-phase asynchronous motor with low control precision，slow response，and large calculation of basic
SVPWM calculation time． The fan is calculated by rotating the reference vector of some sectors． The action time
of the zone 1 and the sector 6 save the calculation of the action time of other sectors and simplify the calculation
amount． By constructing the vector control model of the asynchronous motor，the simulation analysis of the load
characteristics on the pumping unit verifies that the speed tracking is strong，the overshoot is small，and the flux
linkage is small，especially for the application scenarios with sudden load changes it has certain superiority．

Key words: three-phase asynchronous motor, vector control, improved space vector pulse width modulation
( SVPWM) control algorithm