Apparatus for controlling a drive motor in a weaving machine
First Claim
1. Apparatus for controlling the operation of a drive member actuating a reed member in a weaving machine, comprising:
- a drive unit, connected to a power supply network, for controllably rotating the drive member;
said drive unit including a) a direct-current operated unit selectively operable both as a direct-current motor and as a direct-current generator, and b) means for effecting the selective operation;
a control unit for generating and supplying to said drive unit at least one control signal for substantially continuously controlling the angular velocity of the drive member in each of its revolutions, said at least one control signal farther selectively controlling said drive unit to operate in first modes wherein said drive unit operates as said direct-current motor and in second modes wherein said drive unit operates as said direct-current generator,whereby said drive unit is selectively operable over predetermined portions of a cycle of operation to function either as a motor energized by the power supply network or as a direct-current generator to feed energy back to the power supply network.
1 Assignment
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Accused Products
Abstract
An apparatus and method for actuating a drive member in a weaving machine comprises a drive unit, connected to a power supply network, for controllably rotating the drive member. The drive unit includes a direct-current operated unit selectively operable both as a direct-current motor and as a direct-current generator. A control unit is provided for generating and supplying to the drive unit at least one control signal for substantially continuously controlling the angular velocity of the drive member in each of its revolutions. According to the present method the control signal further selectively controls the drive unit to operate in first modes where the drive unit operates as a direct-current motor and in second modes where the drive unit operates as a direct-current generator. The drive unit is selectively operable over predetermined portions of a cycle of operation to function either as a motor energized by the power supply network or as a direct-current generator to feed energy back to the power supply network.
14 Citations
19 Claims
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1. Apparatus for controlling the operation of a drive member actuating a reed member in a weaving machine, comprising:
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a drive unit, connected to a power supply network, for controllably rotating the drive member; said drive unit including a) a direct-current operated unit selectively operable both as a direct-current motor and as a direct-current generator, and b) means for effecting the selective operation; a control unit for generating and supplying to said drive unit at least one control signal for substantially continuously controlling the angular velocity of the drive member in each of its revolutions, said at least one control signal farther selectively controlling said drive unit to operate in first modes wherein said drive unit operates as said direct-current motor and in second modes wherein said drive unit operates as said direct-current generator, whereby said drive unit is selectively operable over predetermined portions of a cycle of operation to function either as a motor energized by the power supply network or as a direct-current generator to feed energy back to the power supply network. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 15)
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14. In a weaving machine, a method for controlling the operation of a drive member actuating a reed member, said method comprising the steps of:
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connecting a drive unit to a power supply network to controllably rotate the drive member which includes a direct-current operated unit constructed to operate both as a direct-current motor to operate as a direct-current generator; generating and supplying to said drive unit at least one control signal to control continuously the angular velocity of the drive member in each of its revolutions, and to selectively also control said drive unit to operate in first modes in which said drive unit operates as a direct-current motor and alternatively in second modes in which said drive unit operates as a direct-current generator, whereby said drive unit it selectively operable to function either as a motor energized by the power supply network or as a direct-current generator to feed energy back to the power supply network. - View Dependent Claims (16, 17, 18, 19)
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Specification