| 摘要 |
PURPOSE:To prevent the adverse influence due to insensitive zone of a pulse width modulator by providing a diode between a triangular wave signal generator and a comparator. CONSTITUTION:A triangular wave signal TRS generated from a triangular wave signal generator 150 is input through a diode 151 to a difference circuit 114a for subtracting the signal TRS from a current command ic and to an adder 114b for adding the command ic and the signal TRS. The output of the difference circuit 114a is input to comparators 114c, 114d having insensitive zones, the output of the adder 114b is input to comparators 114e, 114f having insensitive zones to become PWM signals SQ1-SQ4. The diode 151 is provided to compensate the insensitive zones of the pulse width modulator. |
