8 results about "Primary permanent" patented technology

This invention provides a permanent magnet synchronous motor rotor and a permanent magnet motor. The permanent magnet synchronous motor rotor includes a rotor core and permanent magnets. The permanent magnets include a primary permanent magnet and a secondary permanent magnet connected to each other. The rotor includes multiple magnetic poles, with a magnetic pole boundary line between two adjacent magnetic poles. The center line of the primary permanent magnet is inclined with respect to its nearest magnetic pole boundary line, forming a non-zero angle A. The center line of the secondary permanent magnet is also inclined with respect to its nearest magnetic pole boundary line, forming a non-zero angle M. M and A satisfy the following relationship: 0.3 ≤ M / A. According to this invention, the angle between the primary and secondary permanent magnets and the armature magnetic field lines can be increased, reducing the demagnetization rate of the primary and secondary permanent magnets, thereby improving the motor's anti-demagnetization capability. Simultaneously, it increases the magnetic flux supplied by the primary and secondary permanent magnets to the air gap, increasing the motor's flux linkage, reducing the motor's operating current, reducing copper losses, and improving motor efficiency.

The invention discloses a method for reducing the cogging force of a permanent magnet linear motor, and the method comprises the steps: fusing an edge end tooth with a first tooth based on an air gap magnetic conductance equivalence principle, and achieving the parallel connection on a magnetic circuit. And the width of the first lengthened tooth is ensured to be the same as that of other teeth, and the length of the first lengthened tooth is changed, so that the cogging force of the linear motor can be greatly reduced without side end teeth, and the running stability of the motor is improved. Meanwhile, the method is suitable for any long-primary permanent magnet linear motor matched with a pole slot. In addition, the method has fewer motor size parameters, and compared with an edge end tooth scheme, the method greatly reduces the optimal time of the motor.

A relay is disclosed to enhance a retention force. The relay includes a yoke iron, a top cover, a static iron core, a primary permanent magnet group, a secondary permanent magnet group, a first movable iron core, and a second movable iron core. The top cover is provided with a first opening group. The first opening group is provided at a position at which the top cover is configured to be in contact with the first movable iron core. The first opening group includes at least one first sub-opening. The yoke iron is provided with a second opening group, the second opening group is provided at a position at which the yoke iron is configured to be in contact with the second movable iron core, and the second opening group includes at least one second sub-opening.

The present invention provides a bilateral transverse flux linear motor, comprising a single-phase primary unit, the single-phase primary unit comprising a primary winding, a primary permanent magnet, and two staggered primary cores, each of which comprises a wide tooth, two narrow teeth on either side of the wide tooth, and a yoke connected to the first end of the wide tooth and the first end of each narrow tooth. The primary winding is disposed around the wide teeth of the two primary cores, and within the same primary core, the wide tooth and the two narrow teeth form a front-to-back spacing in the linear motion direction of the primary core. The present invention can help reduce the mutual inductance between the wide and narrow teeth, reduce the induced current caused by the mutual inductance between the wide and narrow teeth, reduce the probability of high-temperature burning of the primary winding and high-temperature demagnetization of the primary permanent magnet, and eliminate the mutual size restriction caused by the wide and narrow teeth being in the same plane. Under the premise of maintaining the same motor performance, the structure of the primary core with front-to-back staggered is more compact.

An electronic cylinder lock (1) comprises a rotor (2), an actuation cam (3) for operating a lock opening mechanism, and a latch element (4) slidably supported in the rotor (2) between the rotor (2) and the actuation cam (3) between a latched position and an unlatched position, within which rotor (2) a mobile actuator for the latch element (4) is housed, the mobile actuator comprises an electric motor, a rotatable element (5) which can be driven to rotate by the electric motor, and magnetic coupling means between the rotatable element (5) and a sliding latch element (4), wherein the magnetic coupling means comprise at least one primary permanent magnet (6, 7) attached to the rotatable element (5) and at least one secondary permanent magnet (8, 9) attached to the sliding latch element (4).

The application discloses a low-tooth-groove primary permanent magnet linear motor and belongs to the technical field of motors. The application aims at the problem of high tooth groove force of the primary permanent magnet linear motor. The primary permanent magnet linear motor comprises a primary and a secondary, the primary comprises a primary iron core, an armature winding and permanent magnets, the armature winding is wound on the armature tooth of the primary iron core, the armature winding is composed of concentrated windings, the tooth top of the armature tooth is processed with a plurality of unequal-width split teeth to form an odd number of split tooth grooves, the permanent magnets are embedded in the split tooth grooves, the permanent magnet in the middle split tooth groove is higher than the permanent magnets in the split tooth grooves on the two sides, and the plurality of permanent magnets form a non-uniform air gap magnetic field between the primary and the secondary. The application is suitable for high-precision direct drive motion control occasions.

The double-permanent-magnet double-armature motor comprises a primary and a secondary, the primary comprises a primary iron core, a primary armature winding and primary permanent magnets, the primary iron core is composed of primary iron core teeth and a primary iron core yoke, and the primary permanent magnets are located on the same single side of the tops of the primary iron core teeth; an included angle of-15 degrees to 15 degrees is formed between the magnetizing direction of the primary permanent magnets and the central axis of the primary iron core teeth where the primary permanent magnets are located; the secondary comprises a secondary iron core, a secondary armature winding and secondary permanent magnets, the secondary iron core is composed of secondary iron core teeth and a secondary iron core yoke, the secondary permanent magnets are located on the same single side of the tops of the secondary iron core teeth, and the magnetizing direction of the secondary permanent magnets and the central axis of the secondary iron core teeth where the secondary permanent magnets are located form an included angle of 30-90 degrees. The magnetic field phase difference generated by the primary permanent magnets and the secondary permanent magnets of the double-permanent-magnet double-armature motor is small, the permanent magnet torque or thrust generated by unit current can be improved, the power density of the motor is improved, and meanwhile the permanent magnet eddy current loss of the motor can be effectively reduced.

The invention relates to the technical field of wireless charging, and discloses a device for dynamically optimizing wireless charging efficiency in the running process of an AGV (Automatic Guided Vehicle), which comprises an AGV trolley, a receiving part is arranged on the AGV trolley, the receiving part comprises a secondary permanent magnet and a secondary coil wound on the secondary permanent magnet, the device is characterized by comprising a charging area, a transmitting part and a driving part are arranged under the ground of the charging area, the transmitting part comprises a primary permanent magnet, a primary coil wound on the primary permanent magnet and a transmitting circuit electrically connected with the primary coil, the driving part is used for driving the primary permanent magnet to rotate and enabling the plane of the primary coil to be parallel to the plane of a secondary coil, and the plane of the secondary coil is parallel to a chassis of the AGV; the front end of the charging area is provided with an image sensor higher than the ground of the charging area, the image sensor is used for detecting the inclination angle between the AGV chassis and the ground of the charging area, and the driving part, the transmitting circuit and the image sensor are electrically connected with the controller.