| 摘要 |
PROBLEM TO BE SOLVED: To provide a driving device for a paved road surface circular cutting device capable of maintaining the proper number of revolutions and load torque for the change of specification of a cutting diameter in a wide scope and applicable without causing reduction in cutting efficiency. SOLUTION: This driving device 1 for the paved road surface circular cutting device is constituted in such a way that a device 10, in which a plurality of expansible cutting beams 7 are connected with one end of an erected main shaft 6 and cutting edges 9 are attached to tips of the cutting beams 7, respectively, is provided, and the main shaft 6 is rotated and driven by an induction motor 21 to cut a paved road surface into a circular shape by the cutting edges 9. It is provided with a speed detector for detecting the speed of the induction motor 21, a slide frequency computing unit for determining a torque characteristic, a frequency computing unit for determining the frequency of an inverter 23, and a voltage computing unit. The induction motor 21 is driven by the variable frequency inverter 23 which uses computed outputs from the frequency computing unit and the voltage computing unit as a frequency command value and a voltage command value of the inverter 23, respectively. COPYRIGHT: (C)2004,JPO
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