Ring spinning machine
AssigneeRieter Machine Works, Ltd.
InventorsHans Noser, Markus Erni
Life of this patent
Estimating the term…
Abstract
A ring spinning machine with various driving systems 10, 12 for driving spindles, driving arrangements, ring rails and the like is regulated in the case of power failure down to a zero revolution range while maintaining preselected revolution relationships. The driving system which is allocated to the load with the greatest effective inertia serves, at first, for the supply of the other driving system in a generator service. Only in a lower revolution range are the driving systems backed via a battery of relatively low capacity.
Claims20
A ring spinning machine comprising
- a first driving system having at least one motor for driving at least one spindle;
- a second driving system having at least one motor for driving a cylinder of a drafting arrangement;
- a D.C. line connected in common to each said driving system;
- a rectifier connected to said D.C. line for connecting said line to an electrical supply mains;
- an electronic control for controlling the speed of each motor independently of each other, said control being responsive to a power failure to slow the speed of each motor below a preselected minimum value;
- a buffer battery;
- and
- means for selectively connecting said battery to said D.C. line in response to said speed of said motors falling below said preselected minimum value.
A ring spinning machine comprising
- a D.C. line;
- a rectifier connected to said D.C. line for connecting said line to an electrical supply mains;
- a first driving system having a plurality of motors for driving a plurality of spindles and a plurality of inverters, each said inverter being connected to and between a respective motor and said D.C. line;
- a second driving system having at least one pair of motors for driving a supply cylinder of a drafting arrangement, at least a second pair of motors for driving a back cylinder of a drafting arrangement in predetermined relation to said supply cylinder, a fifth motor for driving a ring rail and a plurality of inverters, each said inverter being connected to and between a respective motor thereof and said D.C. line;
- an electronic control for delivering a control signal to each respective inverter for controlling the speed of each motor connected thereto;
- a buffer battery;
- and
- means for selectively connecting said battery to said D.C. line in response to a reduction in speed of said motors below a preselected minimum value during a power failure to maintain a voltage in said second driving system sufficient to retain said predetermined relation between the supply cylinder and back cylinder.
A control arrangement for stopping a textile machine comprising
- a first driving system having at least one motor for driving a first load;
- a second driving system having at least one motor for driving a second load with a lower inertia than said first load;
- a D.C. line connected in common to each said driving system;
- a rectifier connected to said D.C. line for connecting said line to an electrical supply mains;
- an electronic control for controlling the speed of each motor independently of each other, said control being responsive ,to a power failure to slow the speed of each motor below a preselected minimum value;
- a buffer battery;
- and
- means for selectively connecting said battery to said D.C. line in response to said speed of said motors falling below said preselected minimum value.
Dependencies are inferred from the claim text.