| 摘要 |
PURPOSE:To reduce a speed pulsation of a motor by detecting the period of a load pulsation, and forming a correction speed from a mean deviation speed to form data, such as voltage to be applied to the motor. CONSTITUTION:A microcomputer 7 inputs a position detection signal 6S from a pole position detector 6 and a speed command NCMD from a speed instructing circuit 12, and a dividing speed arithmetic processor 18 calculates a detection speed Ni at each divided range of a rotating time of a rotor during a period of 60 deg. at each 30 deg. of the signal 6S. A command input processor 19 reads the speed command and form an internal speed command. A current pattern memory 7-3b stores 12 current data Ii, which are selected by electronic switches SW1-2 of input and output sides at each 30 deg., and output from D/A converter 17. On the other hand, a speed correction processor 20 selects each speed having an error from the speed Ni at each divided range, and calculates a correction speed. |
