Patent ID: 6407527
Filing Date: 2002-06-18
Classification: G05B,H02P

Abstract:
A motor drive control apparatus comprising:a motor including a plurality of electrical power supply points connected to a plurality of coils; feeding means for feeding a current into the respective electrical power supply points drawing means for drawing a current from the respective electrical power supply points; determining means for determining states of the respective electrical power supply points; changing means for changing the amount of current fed to or drawn from the respective electrical power supply points by means of controlling said feeding means and said drawing means in accordance with the states of the respective electrical power supply points determined by said determining means, so as to control current flowing through the plurality of coils by changing the amount of the current fed to or drawn from the respective electrical power supply points; and setting means for setting all the electrical power supply points at the same time to either one of a state where the current is drawn from the electrical power supply points by said drawing means and a state where the current is fed to the electrical power supply points by said feeding means, so as to establish a short period in which no current flows through the plurality of coils.