31results about How to "Solve the problem of flux leakage" patented technology

The invention discloses a quenching inductor for shaft parts and a quenching method, which are designed for solving the problem of poor quenching effect of shaft necks of existing shaft parts. The quenching inductor for the shaft parts is a ring-shaped body, wherein the inner surface of the quenching inductor is a conical surface, and the bottom surface of the quenching inductor is an inclined surface. A self-cooling water channel and a quenching liquid channel of the inductor are formed in a cavity. Magnet conduction layers are formed on the outer surface, the inner surface, the top surface and the bottom surface of the quenching inductor. A quenching system for the shaft parts comprises the shaft parts and the quenching inductor for the shaft parts. According to the quenching method, an included angle is formed between the inner surface and the cylindrical surface of the inductor, and an included angle is formed between the bottom surface and the lower end face of the inductor. The quenching inductor and system for the shaft parts are reasonable in structure, convenient to use and low in manufacture cost, and are suitable for the shaft parts including hollow shaft parts and thin-walled tubes. The quenching method is simple in procedure and has low requirements on hardware such as a device.

The invention discloses a built-in hybrid excitation bilateral magnetic channel linear motor and relates to the technical field of linear motors. The linear motor includes a bilateral secondary stator and a primary mover arranged between the stators, the primary mover includes 6 primary mover units, there is a magnetic barrier between the primary mover units, and the mover The sub-unit includes two H-shaped magnetic cores, the bridge arms of the H-shaped magnetic cores are provided with built-in permanent magnets, and the two ends of the primary mover unit are respectively provided with two sets of armature winding installation slots and a A set of excitation winding installation slots; the secondary stator includes a stator yoke and secondary teeth; the bilateral secondary stator is a fixed part, the primary mover is a moving part, and the primary mover is made in the middle of the bilateral secondary stator Linear motion, which constitutes a linear motion motor with a double-sided plate structure. The linear motor has the advantages of low manufacturing cost, symmetrical flux linkage structure, small DC component, small harmonic component, high thrust density and the like.

The invention discloses a bilateral magnetic flux switching permanent magnet linear motor, which comprises a bilateral secondary stator and a primary mover arranged between the stators, the primary mover includes six primary mover units, and the primary mover There is a connecting bridge between the subunit and the primary mover unit, each primary mover unit includes two H-shaped magnetic cores, and permanent magnets are arranged between the two H-shaped magnetic cores; the spaced on the secondary stator A number of secondary teeth are formed, a secondary slot is formed between the secondary teeth, a yoke is formed at the bottom of the secondary slot, and the H-shaped magnetic permeable core opposite to the secondary tooth Magnetic teeth are formed on the top, and winding installation slots are formed between the magnetic teeth on the same side; the bilateral secondary stator is used as a fixed part, the primary mover is a moving part, and the primary mover is used to make a straight line between the bilateral secondary stators. Movement, the motor that constitutes the bilateral flat plate structure. The linear motor has the advantages of high utilization rate and low flux leakage.

he invention discloses a mixed excitation biconvex pole motor, including rotors, stators, three-phase armature windings and a case, wherein, the case is in magnetic conduction material, the rotor is composed of alveolar type core lamination, the stator fixed in the case includes 'U'-shaped cores arranged with interval between each other and permanent magnets provided between the 'U'-shaped cores and the case, the first permanent magnet charges magnetism tangentially along the circumference, N pole and S pole are arranged alternately, a second permanent magnet is provided between the 'U'-shapedcore base and the case, the second permanent magnet charges magnetism along the radius direction, N pole and S pole are arranged alternately, the three phase armature winding is a concentrated winding, winding on the armature teeth, the armature teeth are composed of adjacent two edges of two 'U'-shaped cores, the single-phase excitation is a concentrated winding, winding on the 'U'-shaped coreand the permanent magnet. In the inventive mixed excitation biconvex pole motor, the permanent magnet excitation and exciter winding electric excitation jointly combine an air-gap field to realize theadjustability of air-gap field, and simultaneously adopts magnetic conduction material as the case so that it can avoid the leakage of case outer edge, improves the motor anti-electromagnetic interference and electromagnetic compatibility, and improves utilization of permanent magnets.

The invention discloses a normal form multi-coil magnetic gathering type wireless charging device for electric automobiles. The wireless charging device comprises an inverter, a ground system induction coil, an automobile chassis secondary coil, vehicular battery equipment, a magnetism detection sensor and a parking target tracking device. The wireless charging device is characterized in that the ground system induction coil controls the parking target tracking device according to the magnetism detection sensor to adjust a parking position in order to realize coincidence of a line between a small coil and the automobile chassis secondary coil with the normal line, induction electromotive force is acquired close to a primary winding space through inductive coupling of high-frequency alternating flux, flux leakage is reduced, wireless transmission efficiency is improved, and electric energy is provided for a vehicular battery.

A design method of a closed-loop current sensor, the closed-loop current sensor includes a magnetically sensitive chip, a magnetic circuit, a feedback coil and a signal processing circuit, the magnetic circuit consists of iron core segments arranged at intervals along the circumferential direction or is a full hollow magnetic circuit, The design method of the current sensor includes the following steps: determine the structure of the sensor; determine the size of the secondary current; determine the standard feedback amount of the sensor according to the secondary current and the number of coil turns, and then determine the design feedback amount of the sensor; calculate the conversion of the current to the magnetic field The value of the function; calculate the magnification K of the signal processing circuit, and determine the signal processing circuit after determining the magnification of the signal processing circuit, thereby completing the overall design of the closed-loop current sensor. The invention can effectively reduce the power consumption of the sensor, reduce the cost, balance the problems of accuracy and power consumption encountered in the current sensor, and is especially suitable for the design of a closed-loop current sensor with high precision, large range and low power consumption.