WORKING UNIT EQUIPPED WITH A DEVICE FOR CONTACTLESS ELECTRICITY TRANSFER AND METHOD FOR CONTACTLESS ELECTRICITY TRANSFER IN A WORKING UNIT
First Claim
1. A working unit defining a stationary part and a part movable relative to the stationary part, and having a working device in the movable part and forming an electrical user device, an electricity supply, in the stationary part and configured for generating a high frequency variable electricity supply, and a contactless electricity transfer device comprising:
- a stationary core made of ferromagnetic material, connected to the stationary part of the working unit;
a first winding, wound on the stationary core and connected to the electricity supply;
a movable core made of ferromagnetic material, connected to the movable part of the working unit;
a second winding, wound on the movable core and connected to the working device for powering it,wherein the stationary and movable cores are coupled, in such a way that a first current circulating in the first winding generates by electromagnetic induction a second current in the second winding, so the contactless device for transferring electricity constitutes a contactless electricity supply line of the working device;
a control element, movable as one with the working device and designed to vary a relative electrical property as a function of a parameter relative to the working device;
the control element is connected to the electricity supply or a further electricity supply for being supplied in the absence of electricity supply dispensed to the working device.
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Accused Products
Abstract
Described is a working unit (1) comprising a stationary part (2) and a movable part (3) and a movable working device (4) defining an electrical user device, powered by a stationary electricity supply (5A) through a first contactless electricity supply line (L1), defined by a rotary transformer; the working unit (1) also comprises a control element (12), movable as one with the working device (4) and designed to vary a relative electrical property as a function of a parameter relative to the working device (4); the control element (12) is powered, at least temporarily, independently from the electricity supply of the working device (4).
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Citations
25 Claims
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1. A working unit defining a stationary part and a part movable relative to the stationary part, and having a working device in the movable part and forming an electrical user device, an electricity supply, in the stationary part and configured for generating a high frequency variable electricity supply, and a contactless electricity transfer device comprising:
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a stationary core made of ferromagnetic material, connected to the stationary part of the working unit; a first winding, wound on the stationary core and connected to the electricity supply; a movable core made of ferromagnetic material, connected to the movable part of the working unit; a second winding, wound on the movable core and connected to the working device for powering it, wherein the stationary and movable cores are coupled, in such a way that a first current circulating in the first winding generates by electromagnetic induction a second current in the second winding, so the contactless device for transferring electricity constitutes a contactless electricity supply line of the working device; a control element, movable as one with the working device and designed to vary a relative electrical property as a function of a parameter relative to the working device; the control element is connected to the electricity supply or a further electricity supply for being supplied in the absence of electricity supply dispensed to the working device. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. A method for contactless electricity transfer in a working unit, comprising a transfer of energy between a stationary electricity supply configured to generate a high frequency variable electricity supply, and a working device defining an electrical user device movable relative to the electricity supply, by means of the following steps:
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generating a first current circulating in a first winding wound on a stationary core made of ferromagnetic material and connected to the electricity supply; generating by electromagnetic induction, by the first current, a second current circulating in a second winding connected to the working device and wound on a movable core made of ferromagnetic material coupled to the stationary core, to define a contactless electricity supply line of the working device, supplying electricity to a control element, movable as one with the working device and designed to vary a relative electrical property as a function of a parameter relative to the working device, through the electricity supply or a further electricity supply, in the absence of electricity supply dispensed to the working device. - View Dependent Claims (22, 23, 24, 25)
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Specification