STATOR-ELEMENT FOR A LINEAR-ELECTRICAL-DRIVE, DOOR PROVIDED WITH A STATOR-ELEMENT AS SUCH

Abstract: Stator element (15) for linear-electric-drive of a body reciprocally slidable over a limited length in a straight or curved line, such as a door (1), gate or carriage, provided with a magnet (10) or magnetizable counter element, which stator (15) is provided with an elongate holder (16), a number of rod-like, mutually parallel and adjacent carriers (17) fixed transversely onto the holder (16) and a number of windings (18, 18') each of which is wound in each case round at least one carrier (17) along a side of the holder (16), which winding (18, 18') is connected onto a controlled voltage source so that accurate speed control of the body for moving can be obtained.

Description: STATOR-ELEMENT FOR LINEAR-ELECTRICAL-DRIVE DOOR PROVIDED WITH A STATOR-ELEMENT AS SUCH The invention relates to a statorelement for linear- electrical-driving of a body reciprocally slidable over a limited length in a straight or curved line, such as a door, gate or carriage, provided with a magnet or magnetizable counter element . Linear drive techniques are generally known and serve mainly for the driving of a body along a rail, such as trains and the like. The invention relates particular¬ ly to linear driving of bodies which are moved recipro- cally over a limited length, for instance a sliding door. This is associated with the problem that the control of the linear drive motor must be such that the movement of the body proceeds smoothly and the end positions are accurately defined. Furthermore, the drive must be safe and easy to operate. The statorelement according to the invention is distinguished by an elongate holder, a number of rod¬ like, mutually parallel and adjacent carriers fixed transversely onto the holder and a number of windings, each of which is trained in each case round at least one carrier along a side of the holder, which • .•rinding is connected onto a controlled voltage source. Due to the controlled voltage source each winding in the statorelement can be actuated separately and there- fore the correct magnetic field generated in order tc move the magnetizable counter element and the body con¬ nected thereto, wherein the control is such that overlap¬ ping magnetic fields can be generated to obtain a smooth movement. The end positions are accurately defined b opposite actuation of the magnetic fields so that the movement is braked at the ends . A more precise control of the movemer.t can be ob¬ tained according to the invention in that each winding is trained in each case round two carriers and two separate- ly powered windings overlap one another. It is hereby possible to obtain overlapping magnetic fields. The invention further relates to a sliding door consisting of a door panel, a series of permanent magnets arranged on the top edge of the panel and a guide strip of magnet-sensitive material arranged on the upper side of the door recess, this such that the door panel is suspended from the recess by means of the magnet action and is slidable reciprocally along the strip, which according to the invention is provided with a statorelement as described above. Above mentioned and other features of the invention will be elucidated hereinbelow with reference to an embodiment in the form of a sliding door. In the drawing: fig. 1 shows a perspective view of a sliding door which is suspended by means of magnets from the lintel of a frame and which can be moved reciprocally by means of a linear drive according to the invention, fig. 2 is a perspective view of a detail of the statorelement with the upper part of the door of fig. 1. Designated in the drawings with the numeral 1 is a door panel which is for instance suspended at the top from a lintel 2 of a frame 3 which is placed in a random building, outer wall etc. The frame is em-bcdied partly as a housing 4 in which the door panel i car. he received. The door is movable reciprocally in the direction of arrow FI . Suspension of the door panel 1 can take place for instance by arranging a number of magnets :r magnet groups 10, the magnetic field strength of v."hich is such that an attractive force is obtained to he guide ρ_ . a'_— 11 arranged on the underside of lintel 2. 7h.iefcr a. m. -. σ. Z IV. force is sufficient to lif the weight of door panel 1. Arranged at the ends of the magnet groups s a guide wheel 12 which runs in a guide 14 on the underside of strip 11. In order to enable reciprocal movement of door panel 1 in the direction of the arrow Pi a statorelement 15 is arranged above guide strip 11. This statorelement consists of an elongate holder 16 on the underside of which a number of carriers 17 are arranged in transverse direction. Both the elongate holder 16 and the carriers 17 are made of a metal. A winding 18 is arranged round each carrier such that a portion of the winding runs along the upper side of the carriers 17 and the remaining portion below the elongate holder 16. Thus result torus- shaped windings which are each actuated separately by a voltage. This voltage can be alternating voltage, for instance blocking voltage, and is controlled by an elec- tronic control (not shown) such that each winding can be actuated separately with a determined voltage value and time duration. The embodiment depicted in fig. 2 shows that in each case a torus-shaped winding is trained over two carriers 17, wherein the adjacent windings can mutually overlap, see winding 18 ' . The whole stator, that is, holder with carriers and windings fixed thereto, is received in a profile 19 which is wholly filled with a resin 20. The control can be augmented with switches for operation by the user. These can be foot switches 21, see fig. 1, approach switches 22 and any other suitable switch, for instance remote controlled. For safety pur¬ poses a detection sensor 24, for instance in the form of a light-sensitive sensor, can be arranged on the inside of the standing moulding 23 of frame 3, wherein the drive is stopped immediately through interruption of the light ray 25. Interruption can be caused by the passage of objects or people. The invention is not limited to the above described embodiment. It is for instance possible tc embody the statorelement in a curved line, whereby the counter element moves as according to this curved line and the body can turn in a circle .

Claims: CLAIMS 1. Statorelement for linear-electrical-driving of a body reciprocally slidable over a limited length in a straight or curved line, such as a door, gate or car¬ riage, provided with a magnet or magnetizable counter element, characterized by an elongate holder, a number of rod-like, mutually parallel and adjacent carriers fixed transversely onto the holder and a number of windings, each of which is trained in each case round at least one carrier along a side of the holder, which winding is connected onto a controlled voltage source. 2. Statorelement as claimed in claim 1, character¬ ized in that each winding is trained in each case round two carriers and two separately powered windings overlap one another. 3. Statorelement as claimed in claim 1 or 2 , char¬ acterized in that the power supply for each winding in the statorelement is a blocking voltage. 4. Sliding door consisting of a door panel, a series of permanent magnets arranged on the top edge of the panel and a guide strip of magnet-sensitive material arranged on the upper side of the door recess, this such that the door panel is suspended from the recess by means of the magnet action and is slidable reciprocally along the strip, characterized in that the guide strip is provided on the side remote from the magnet with a statorelement as claimed in any of the foregoing claims. 5. Sliding door as claimed in claim 4. characterized in that the magnets are disposed transversely of the sliding direction. 6. Sliding door as claimed in claims 4 and 5, char¬ acterized in that the magnets are arranged in groups, which groups are arranged at a mutual distance as seen in the sliding direction. 7. Sliding door as claimed in claims 4-6, character¬ ized in that the magnets are arranged in the group with alternating north and south pole. 8. Sliding door as claimed in claims 4-7, character¬ ized in that on either side of the magnet a travel wheel is arranged on the upper side of the door.

Inventors: KABOUT WIM, KABOUT, WIM
Applicants: KABOUT WIM, STATOR B V, KABOUT, WIM, STATOR B.V.
Application year: 1993
Main classification: H02K41
IPC codes: E05F15, H02K41