Current regulation of permanently excited synchronous motors

摘要

In current regulation of a permanently excited synchronous motor for a guided missile with an electromechanical actuating drive for the rudder, the commanded current is always guided orthogonally to the magnet-wheel flow. From the measured current of two phase vector is voltages, the value of the current-space vector is determined and the error amount of the current is added to the desired value via a correction regulator. Also, from the measured current of two phase voltages as well as from the angle command of the current-space vector, a measurement for the angle error is determined and added to the desired angle value via a correction regulator. The method according to the invention can be implemented with little hardware expenditure and in a compact design size, even for high rotational speeds of more than 10,000 r.p.m. Current-regulating methods used so far, which involve frequency response compensation in polar coordinates, cannot be used with synchronous motors, because explicit determination of the angle of the space current vector fails in cases where the measured current disappears.