Title:
DEVICE FOR DRIVING A SEWING MACHINE
Document Type and Number:
WIPO Patent Application WO/1985/003958
Kind Code:
A1
Abstract:
A device for driving a sewing machine in which a brushless electric motor is used to drive the sewing machine, the brushless motor having a rotor made up of permanent magnets, and permitting the current-carrying phase of the stator winding to be changed depending upon the position of the rotor. A speed instruction signal generated by a speed instructor (32) depending upon the displacement quantity of a pedal (31) is compared with a speed detect signal produced by a speed detector (44), to control the revolving speed of a motor (42). Further, the motor (42) is controlled in the reverse direction by a stop instruction signal generated by a position instructor (33) responsive to the operation of the pedal (31) and by a needle position detect signal produced by a needle position detector (46) in order to stop the stiching needle at a predetermined position.
Inventors:
DOHI TAKASHI (JP)
SHIBATA NOBUHO (JP)
OHARA KENICHI (JP)
SHIBATA NOBUHO (JP)
OHARA KENICHI (JP)
Application Number:
PCT/JP1985/000087
Publication Date:
September 12, 1985
Filing Date:
February 26, 1985
Export Citation:
Assignee:
MATSUSHITA ELECTRIC IND CO LTD (JP)
International Classes:
D05B69/26; H02K29/06; H02P6/06; (IPC1-7): D05B69/26
Foreign References:
| JPS5688687A | 1981-07-18 | |||
| JPS4849547A | 1973-07-12 | |||
| JPS412812B1 |
Other References:
See also references of EP 0176599A4
Download PDF:
Previous Patent: APPARATUS FOR CONTROLLING SEWING MACHINE
Next Patent: METHOD AND DEVICE FOR THE FLOTATION OF DISPERSIONS
Next Patent: METHOD AND DEVICE FOR THE FLOTATION OF DISPERSIONS