| 摘要 |
PURPOSE:To control the speed of the non-commutator motor extending over a wide range by property using the control of pulse width and the control of pulse frequency in response to load. CONSTITUTION:When accelerating the motor, an amplifier 2 of a minor loop is under a saturated condition by the amplification signals (the amount of a current command) of the amount of deviation between the amount of actual speed detected No and the amount of a speed command Ni and current detecting signals Ii, and output V1 from the amplifier 2 is each given to an amplifier 3 of a pulse width controlling system and an amplifier 5 of a pulse frequency controlling system. The amplifier 3 of the pulse width controlling system operates in response to the value of input voltage V1 (the amount of speed deviation) under a condition that the amount of negative bias is applied and outputs necessarry pulse width command voltage V2 and the pulse frequency controlling system the maximum pulse frequency command voltage V3 at all times respectively, and input them to the controller 8. When decelerating the motor, voltage command V2 corresponding to the amount of speed deviation from the amplifier 3 and the predetermined maximum pulse frequency command voltage V3 are inputted to the controller 8, but the saturated condition of the amplifier 5 is released and the frequency of pulse voltage is lowered when the motor is not decelerated up to command speed. |
