摘要:
The invention relates to a method of producing a winding (1), e.g. for an electrical transformer, from a cylindrical, tubular metal element having a straight polygonal section. The inventive method is characterized in that it comprises the following steps consisting in: machining a series of essentially-parallel cuts through all of the sides (1a, 1c, 1d) of the tubular element excluding one last side (1b), said step being performed in a first series of passes; and, in a second series of passes, machining cuts in the aforementioned last side (1b) in order to form a junction with the cuts in the adjoining sides, such that said cuts are continuous and form a single helicoidal groove.
摘要:
A method for producing a winding, particularly for electrical transformer from a cylindrical tubular metal element of polygonal cross-section, includes steps of machining, in a first series of passes, a first series of cuts substantially parallel to one another through all of the sides of the tubular element with the exception of a last one of said sides, and machining, in a second series of passes, a second series of cuts in said last one of said sides in order to ensure that junctions of the first series of cuts open out in the sides adjacent to the second series of cuts, so that the first and second series of cuts are continuous with respect to one another and constitute a single groove of helicoidal shape.
摘要:
An installation for heating grounds, in particular sports grounds, using cables (9, 9′, 9″) supplied with electric current which are buried in the ground. The installation is characterized in that the surface of the grounds to be heated is divided into a number of sectors (1a, 1b, 1c, . . . , 1n), and each sector is heated by at least two heating lines (9, 9′, 9″) constituting each a secondary of a common transformer (3a, 3b et 3c).
摘要:
A longitudinal flexible heating mat includes a thin conductive metal strip (3) which is intended to be supplied with electric current at the ends (C, D) thereof and which is trapped between two flexible, insulating sheets (1, 1′) . The conductive strip includes at least two elements (3a, 3b) which extend from one of the longitudinal ends (A) of the mat to the other longitudinal end (B) of same. The first ends (C, D) of the aforementioned elements are intended to be connected to respective electric power terminals, and the second ends (D, E) of the elements are free and intended to be connected to one another using connection members (7). The invention also relates to a method of producing one such mat.
摘要:
Each end of an insulating tube which surrounds a transformer core projects beyond the electric circuits carried by the tube and is associated with an annular spacer member having two radially displaced bearing surfaces applied respectively against the core and the tube. An axial slit formed in the insulating tube is opened-out in order to insert the transformer core within the tube and then re-closed. A driving wheel is removably coupled to the tube in order to drive it in rotation during the winding operation.
摘要:
The transformer comprises a magnetic circuit (8) as well as, in the case of each phase, a high-voltage electric circuit (17) and a low-voltage electric circuit (18) both wound around at least one section of the magnetic circuit (8). The electric circuits (17, 18) are arranged in at least one electrically insulating annular coil form (11) which, under service conditions, is interposed between the electric circuits (17, 18) and the aforementioned section of the magnetic circuit (8). Utilization in particular is for improving the occupation of electric windows by the magnetic circuit and of magnetic windows by the electric circuit.
摘要:
Each end of an insulating tube which surrounds a transformer core projects beyond the electric circuits carried by the tube and is associated with an annular spacer member having two radially displaced bearing surfaces applied respectively against the core and the tube. An axial slit formed in the insulating tube is opened-out in order to insert a transformer core within the tube and then re-closed. A driving wheel is removably coupled to the tube in order to drive it in rotation during the winding operation.
摘要:
A soil-heating device, particularly for soil covered by a synthetic surface, of the type including a heated film (1). The device includes two sealed and electrically-insulating support sheets (1a, 1b; 1′a, 1′b), between which parallel conducting resistive strips (3,3′) are arranged over the length of the support sheet in pairs, such that, at one end (B) the strips are connected to two electrical supply connectors (L, N) and, at the other end (A), connected to each other by a conducting bridge (9).
摘要:
An electric transformer includes a magnetic circuit and, for each phase, an electrical winding including at least one coil, wherein each electrical winding is made of a good conductive material wire or band, notably aluminum, wound about a wheel rim-shaped annular former. Each magnetic circuit is made of at least one elementary circuit, provided by coiling a magnetic metal strip of constant width, and is formed with a window for the passage of the corresponding winding or windings, has the shape of an irregular polygon with an axis of symmetry. The magnetic circuits are positioned and maintained on a support plate allowing the passage of the windings.
摘要:
The transformer comprises a magnetic circuit (8) as well as, in the case of each phase, a high-voltage electric circuit (17) and a low-voltage electric circuit (18) both wound around at least one section of the magnetic circuit (8).The electric circuits (17, 18) are arranged in at least one electrically insulating annular coil form (11) which, under service conditions, is interposed between the electric circuits (17, 18) and the aforementioned section of the magnetic circuit (8).Utilization in particular for improving the occupation of electric windows by the magnetic circuit and of magnetic windows by the electric circuit.