Title:
DRIVING DEVICE FOR CONCRETE CUTTING DRY CUTTER
Document Type and Number:
Japanese Patent JP3175106
Kind Code:
B2
Abstract:
PURPOSE: To provide a driving device for a concrete cutting cutter wherein an appropriate peripheral speed of a blade can be kept, and cutting efficiency is also not lowered even when a blade diameter of the cutter is changed in a wide range.
CONSTITUTION: A motor speed frequency converted value VFM and a slip frequency VFS are added with an adder 18. Thereafter, it is respectively inputted to a frequency computing element 14 and a voltage computing element 15. However, a circuit of the frequency computing element 14 is a kind of a limitter circuit. When the added value VFO is lower than a value VFT set by a setter 17 for frequency at highest speed, the value VFO is passed as it is. When it exceeds the set value VFT for frequency at highest speed, the frequency set value VFT is passed as it is. Further, a voltage command value at that speed VINV is computed by a preliminarily determined constant, and inputted to an inverter 13. The inverter 13 receives the frequency command value FINV and the voltage command value VINV, and drives an induction motor 11 of a cutter. That operation is continuously carried out, and characteristics conforming to a load characteristic at that time can be obtained.
Inventors:
Tsuneo Kumaki
Yoshiaki Akao
Kazuo Kaneko
Shozo Inuyama
Yoshiaki Akao
Kazuo Kaneko
Shozo Inuyama
Application Number:
JP4016395A
Publication Date:
June 11, 2001
Filing Date:
February 28, 1995
Export Citation:
Assignee:
JPE Co., Ltd.
International Classes:
B28D1/24; H02P27/06; (IPC1-7): B28D1/24; H02P5/41
Domestic Patent References:
| JP662590A | ||||
| JP679716A |
Other References:
【文献】特許2783518(JP,B1)
Attorney, Agent or Firm:
Toshitada Takahashi (1 outside)