| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a control device for electrically movable seats that restrains outward emission of PWM noise, arising when motors are started or stopped, as vehicle noise while reducing the total length of working time of every motor to be driven. <P>SOLUTION: A control device comprises a plurality of motors provided to make the shape or position of a seat variable; PWM drive means of which one unit is provided for each motor and PWM-drives the motor; and speed control means that performs speed control to gradually vary the speed of each motor at the time of starting and stopping the motor by the PWM drive means. When the speed control of at least one of the motors at the time of its stopping and that of other motors at the time of their starting are performed, the speed control means brings into coincidence the timing of speed control of each of the two of more motors with that of others, and the PWM drive means makes the phases of the two or more motors, when subjecting them to PWM control, reverse to each other. <P>COPYRIGHT: (C)2013,JPO&INPIT |
