MOTOR CONTROLLER ACHIEVING HIGHER ACCURACY IN LOW REVOLUTION ZONE

摘要

PROBLEM TO BE SOLVED: To solve a problem that the resolution of a command signal to the positional deviation of a motor drops in a low revolution zone since a motor control signal basically has only eight patterns, or a problem that there is necessity to use power voltage that is not safe at all, in case that there is a leakage or a shock hazard, etc.;SOLUTION: The number of inverter drivers (1) is made n times as large as that of motors (2) in each of which the number of poles is reduced to P/n (but, n is a natural number of 2 or over) as opposed to the constitution of a conventional three-phase motor, and the phases are increased by a number responding to it into 3n phases. The rating can be made small. Though it only has to control the inverter drivers (1) to operate optimally in parallel, attention shall be paid to the arrangement of motor winding.;COPYRIGHT: (C)2009,JPO&INPIT