摘要:
An actuator to displace, for example a mirror, provides movement with at least two degrees of freedom by varying the currents in two electromagnets. A moving part includes a permanent magnet with a magnetic face constrained to move over a working area lying substantially in a first plane perpendicular to a direction of magnetization of the magnet. The electromagnets have pole faces lying substantially in a second plane closely parallel to the first plane, each pole face substantially filling a quadrant of the area traversed by the face of the moving magnet. An optical position sensor may direct a beam of radiation at the moving magnet through a central space between the electromagnets. The sizes of facets in a pupil mirror device may be made smaller in a peripheral region, but larger in a central region, thereby relaxing focusing requirements.
摘要:
In an overload relay, a tripping actuator 12 has a first magnet 18 and a moveable contact carrier 20 has a second magnet 28 mounted opposed to the first magnet. A moveable contact 22 on the moveable contact carrier is urged by repulsion between the magnets, to make a normally closed connection with a stationary contact 24, when the tripping actuator is in an ON position 15 and the contact carrier in a first stable position 26′. The magnets pass through an over-center tripping position (T) when the tripping actuator is moved to an OFF position 23 in response to an overcurrent condition sensed by a bimetallic thermal overload sensor 16. The magnets repel each other after passing through the over-center tripping position, to thereby urge the moveable contact into a second stable position 26, away from the stationary contact, to break the normally closed connection with the stationary contact.
摘要:
An electrical contactor has a first terminal having a fixed member with at least one fixed electrical contact, a second terminal, and a busbar connected to the second terminal. Two conductive movable arms are connected to the busbar and have a contact thereon. One arm is biased-closed to contact the fixed electrical contact in the absence of a separating force, and the other arm is biased-open to be spaced away from the fixed electrical contact in the absence of a closing force. The first and second movable arms and the busbar are arranged so that, when the contacts close, contra-flowing current urges the movable arms towards the fixed member to increase a force between the contacts.
摘要:
The present invention relates to a direct current relay, and more particularly, to a direct current relay capable of reducing an electronic repulsive force generated between a fixed contact and a movable contact by a permanent magnet installed to extinguish an arc. The direct current relay includes: a frame; first and second fixed contacts spaced from each other with a predetermined distance there between; first and second magnetic substances formed to enclose a lower part of the first and second fixed contacts; a movable contact movable to contact or to be separated from the first and second fixed contacts, having a first movable contact contactable to the first fixed contact, and having a second movable contact contactable to the second fixed contact; and a pair of permanent magnets installed on long sides of the frame.
摘要:
An electrical contactor is provided comprising a first terminal having a fixed member with at least one fixed electrical contact; a second terminal; at least one electrically-conductive movable arm in electrical communication with the second terminal and having a movable electrical contact thereon; and an AC dual-coil actuator having a first drive coil drivable to open and close the movable and fixed electrical contacts, and a second non-drive coil feedback connected to induce a reverse flux to temper and stabilize a net flux, thereby enabling control of a delay time of the opening and closing electrical contacts so as to be at or adjacent to a zero-crossing of an associated AC load current
摘要:
A electromagnetic relay including a plate-shaped pivoting piece (32), one end of which is supported in cantilever state, pivoted by a movable block (40), which reciprocates in the up-down direction on the basis of excitation and demagnetization of an electromagnet block (20) housed within a housing (10, 50), and causes a movable contact (34) formed on the other end of the plate-shaped pivoting piece (32) to make/break contact with an anchored contact (36) formed on the tip section of an anchored contact terminal (35). In particular, the one-end section of the plate-shaped pivoting piece (32) is supported pivotably in cantilever state by the upper end section of a movable contact terminal (31), with a support spring (33) comprising a conductive sheet spring material interposed therebetween.
摘要:
A polar electromagnet device has a drive shaft comprising an axis center supported so as to reciprocate in an axis center direction at a center hole of a spool wound with a coil, and a movable iron core attached to a lower end of the drive shaft on the axis center. The drive shaft is reciprocated with the movable iron core which reciprocates based on excitation and demagnetization of the coil. A permanent magnet is integrally arranged at the movable iron core on the same axis center.
摘要:
A polarized electromagnetic relay including an electromagnet assembly, a contact section insulated from the electromagnet assembly, and a force transfer member disposed between the electromagnetic assembly and the contact section. The electromagnet assembly includes an electromagnet, an armature driven by the electromagnet, and a permanent magnet carried on the armature. The armature includes first and second electrically conductive plate elements holding the permanent magnet therebetween in a direction of magnetization of the permanent magnet and disposed to orient the direction of magnetization in parallel with the center axis of the coil. The armature is arranged linearly movably in a direction parallel with the center axis in a state where a part of the first electrically conductive plate element is inserted into a space between the outer peripheral region of the iron core head portion and the distal end region of the yoke major portion.
摘要:
A contact device has a first yoke having a substantially U-shape, a second yoke bridged over both ends of the first yoke, a spool wound with a coil disposed between the first yoke and the second yoke, a movable iron core inserted into a center hole of the spool in a reciprocating manner, and a contact mechanism unit formed above the second yoke driven with a drive shaft having a lower end fixed to the movable iron core, which reciprocates based on excitation and demagnetization of the coil, and an upper end projecting out from an upper surface of the second yoke. An insertion hole communicating to the center hole of the spool and through which the movable iron core reciprocates is formed in the first yoke. An annular auxiliary yoke including an insertion hole communicating to the insertion hole of the first yoke and through which the movable iron core reciprocates is provided at a lower surface of the first yoke.
摘要:
In an actuator of the invention, coils are kept from being displaced along a y-axis direction as projections of coil bobbins are sandwiched between first and second iron cores along the y-axis direction. Also, the coils are kept from being displaced excessively along x- and z-axis directions due to shocks, for instance, as they are fitted in groovelike channels formed in the first and second iron cores. Since two bearings are sandwiched and fixed between third and fourth iron cores along the x-axis direction, the bearings can be easily set on a common axis with high accuracy. It is therefore possible to prevent displacement of the coils during operation of the actuator. Slidable support plates ensure smooth movements of an armature and thereby provide improved reliability even when the distance between the support plates and the first to fourth iron cores is reduced.