Electrical drive system for a sewing machine

Details Electrical drive system for a sewing machine Electrical drive system for a sewing machine

D - Textiles, Paper

05

B

342/35, 341/91

D05B 69/10 (2006.01) D05B 69/26 (2006.01)

Patent

CA 1094205

ABSTRACT OF THE DISCLOSURE An improved speed controlling system for an electric sewing machine motor. The system includes a motor connected to a power supply, one or more speed controlling circuits for operating the motor at variably controlled speeds, and one or more electrical braking circuits for braking the motor upon re- ceiving a deceleration command from the speed controlling cir- cuit to slow the motor from high speed to low speed. Electro- mechanical brakes brake the motor, during at least a part of the braking period, the braking means being controlled by the elec- trical braking circuits. A low speed setting circuit is pro- vided in the speed controlling circuit for maintaining low running speed caused by the electromechanical braking means and the electrical braking circuits. A circuit is provided for stop- ping the motor, after the motor has been slowed to a low running speed by the low speed circuit, by the electrical braking circuits on command from the electromechanical brake.

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