摘要:
An electromagnetic actuator has a yoke (9) for guiding a magnetic flux, and a holding plate (6) attached to an actuating member (1), the holding plate (6) and yoke (9) forming a first magnetic circuit. Furthermore a magnetic flux generation device is provided for generating a magnetic flux in the first magnetic circuit. The magnetic flux generation device comprises an under voltage release coil (5) electrically connected to an auxiliary voltage source representing the value of a voltage to be monitored.
摘要:
The invention relates to a coil arrangement having a tube-shaped coil support of an electromagnetic drive, particularly a two-stage engaging relay, wherein the coil arrangement comprises a hold-in winding and a pull-in winding, and wherein the coil support comprises at one end thereof a first delimitation and at the other end a second delimitation, the hold-in winding being disposed in between, wherein the first delimitation (3) on the side (6) thereof facing the second delimitation (5) comprises an axial recess (7) for receiving the pull-in winding (22).
摘要:
The invention relates to a coil former for an electromechanical actuator, in particular for a relay, which may be connected to a U-shaped yoke (10), whose base portion (16) is arranged between two limbs (12, 14) and forms a coil core for a coil (18) windable on the coil former (20). The coil former (20) is of one- or multi-piece construction, is resiliently deformable and may be connected, in particular latched, to the yoke (10).
摘要:
An electromagnetic micro positioner, e.g. for use in fibre optics, is operated by a ceramic piston (8) mounted within a ceramic cylinder (5). The piston (8) is moved by a permanent magnet (9) and an electromagnetic circuit (1/2). By changing the coil (2) polarity the piston (8) will either be attracted or repelled to its top or bottom position. In particular the core (1), capable of polarity reversal, has a magnetic remanence by means of which the movable piston (8) is fixable in one of the two predefined positions when the coil (2) is not energized.
摘要:
A regulator (3a) regulates the current flowing through a coil (113) and generates for that purpose regulating signals for a power regulator (5a). The regulating signals are determined when the coil (113) is operated in a free running mode. During the displacement of the armature, the regulating signals depend on the current and the conductance in time of the current through the coil (113).
摘要:
An electromagnetic actuator (10) having a coil (14), stator (12) and an armature (16) where dual parallel channels (13A,13B) are formed in the stator (12) for receiving the coil (14) and where the armature (16) is hinged to the stator (12) for movement toward the stator (12) upon application of an electrical current to the coil (14). The stator (12) has a length (L), a width (W) and a height (H) where its length (L) is at least 1.6 times its width (W) and its width (W) is at least 2.0 times its height (H).
摘要:
The apparatus comprises: a differential driver amplifier (A2) having a first input receiving the control signal through a voltage divider (R1, R2, R3, R7, R8) and a second input receiving a regulation signal and having its output connected to the control terminal of a driver transistor (T2) having its power terminals connected in series with a voltage supply, the injector coil (L4) and a current sensing device (R11) developing the regulation signal, said driver amplifier (A2) providing a command signal to the control terminal of the driver transistor (T2) causing it to conduct to saturation until a peak current level through the coil (L4) is obtained; and a comparator (A4) having a first input terminal receiving the regulation signal and a second input terminal having applied thereto a reference signal having a first value representative of the peak current level and having its output terminal connected to said voltage divider (R1, R2, R3, R7, R8), said comparator (A4) switching the reference signal to a second value representative of a holding current level by modifying said voltage divider (R1, R2, R3, R7, R8) in response to the regulation signal exceeding the first value of the reference signal, and said differential driver amplifier (A2) then providing a command signal to the control terminal of the driver transistor (T2) causing it to reduce the current flow through the coil (L4) to the holding current level until the end of the control signal once the peak current level is reached.
摘要:
The invention relates to a coil arrangement having a tube-shaped coil support of an electromagnetic drive, particularly a two-stage engaging relay, wherein the coil arrangement comprises a hold-in winding and a pull-in winding, and wherein the coil support comprises at one end thereof a first delimitation and at the other end a second delimitation, the hold-in winding being disposed in between, wherein the first delimitation (3) on the side (6) thereof facing the second delimitation (5) comprises an axial recess (7) for receiving the pull-in winding (22).
摘要:
A bobbin-less coil and a method of manufacturing the bobbin-less coil. In the method, a pair of disk-like guide members (65) and (66) are brought into contact with the axial both end faces of a conductor (61) wound in a coil shape by using a separable tool. Parts of the conductor (61) are engaged with engagement parts (65c) and (66c) formed around the pair of guide members (65) and (66) and the pair of guide members are energized in directions for moving them close to each other, and then the tool is separated from the center of the conductor (61). By this, the shape of the bobbin-less coil (46) in which the inner peripheral surface of the conductor (61) wound in the coil shape is exposed can be retained. Also, since the pair of disk-like guide members (65) and (66) are energized in the directions for moving them close to each other by utilizing the parts of the conductor (61), the need of a special material for energization can be eliminated.