167 results about "Magnetic insulation" patented technology

A heat dissipation magnetic insulation tape includes an insulating protective adhesive layer, a composite heat dissipation adhesive layer, and a magnetic insulation adhesive layer which are stacked. the composite heat dissipation adhesive layer is made of thin metal foil coated with heat dissipation graphene, which has good thermal diffusion performance. At the same time, compared with the traditional graphite sheet, the metal foil is not fragile, and no fragments will enter the equipment body. In addition, the metal foil also has excellent electromagnetic shielding function. The heat dissipation and magnetic insulation tape has the characteristics of excellent magnetic insulation effect, good heat dissipation performance and stable adhesion. A wireless charging power receiver includes theheat dissipation magnetic isolation tape, which is thin in thickness, excellent in heat dissipation magnetic isolation performance, stable in adhesion performance, and has high charging efficiency.

The invention relates to a built-in permanent magnet synchronous motor used for a high-speed electric spindle. The built-in permanent magnet synchronous motor comprises a stator iron core, a rotor iron core, a rotation shaft, magnetic steel and stator three-phase symmetrical windings. The built-in permanent magnet synchronous motor is characterized in that the magnetic steel is V-shaped magnetic steel which is evenly inlaid in the circumferential direction and radially magnetized; the V-shaped magnetic steel comprises a plurality of permanent magnets, a plurality of magnetic insulation bridges and a plurality of magnetic bridges; the permanent magnets are arranged on the two sides of the V-shaped magnetic steel, the magnetic bridges are arranged between the adjacent permanent magnets and the magnetic insulation bridges are arranged at the top ends of the V-shaped edges on the two sides and the bottom ends of the V-shaped magnetic steel. The built-in permanent magnet synchronous motor used for the high-speed electric spindle has the advantages that the motor has the high-torque running performance achieved during low-speed running, and has a wide weak magnetic speed raising range at the constant power section above base speed; during constant-power high-speed running, the leakage flux of the permanent magnets is high and the weak magnetic speed raising capacity is high; during non-load running, the leakage flux of the motor is low and the output torque is high; the segmented unequal-thickness magnetic steel enables gap flux densities of the motor to be distributed similar to a sine, therefore, the torque pulsation is low, the control precision is high and the permanent magnets of the motor are not prone to excitation loss.

The invention provides a solenoid with a sealing outer shell and a motion detector circuit which can feedback the operating state of an iron core; the invention can be applied to all automatization control equipments, and is particularly superior while being used in the severe operational environment. The keep solenoid with signal feedback comprises a magnetic insulation wire axes, wherein the middle part of the magnetic insulation wire axes is provided with a through hole extended along the axial direction; the periphery of the magnetic insulation wire axis is wound with coils; the solenoid also comprises a movable iron core which can be movably and freely received in the through hole of the magnetic insulation wire axis, a magnet fixing part which is used to adsorb the movable iron core, a return spring which can push the movable iron core along the direction away from the magnet fixing part, a shell which covers two end faces of the magnetic insulation wire axes and side faces of the coils and a testing circuit which is arranged inside the shell and close to the movable end face of the movable iron core; the testing circuit comprises a signal detecting device which can detect and feedback the position of the movable end face of the movable iron core.

The invention relates to the field of electronic power control, in particular to a control system for I-type and T-type three-level bidirectional PWM (Pulse-Width Modulation) rectifiers. The control system comprises an analog quantity data collecting and conditioning circuit, an IGBT (Insulated Gate Bipolar Translator) magnetic insulation drive circuit, a control circuit consisting of a DSP (Digital Signal Processor) and a CPLD (Complex Programmable Logic Device), a relay output and digital signal input device, and a fault recording and remote communication device, and is characterized in that a Hall sensor data collecting circuit, an IGBT drive circuit and an input and output interface circuit are connected with a CPLD chip; a communication circuit and a fault recording circuit are connected with the DSP; and the DSP and the CPLD are connected with interrupt signals through data, an address bus and a PWM output signal. The control system can be compatible with T-type and T-type three-level topology frameworks, the control system adopts a control framework of the DSP and the CPLD, and the CPLD is responsible for logic control, three-level PWM signal detection and correction functions and the like as a coprocessor, so that the system reliability is improved, and the budget burden of the DSP is alleviated.

The invention discloses a rotor core, which is an annular structure formed by splicing a plurality of arc-shaped core units. Each core unit has splicing surfaces which are attached to adjacent core units, and the splicing surfaces are located at the centers of magnetic insulation magnetic bridges. The rotor core of the invention adopts a splicing block structure, which can improve the material utilization rate and reduce the material cost; at the same time, splicing joints are disposed at the centers of the magnetic insulation magnetic bridges of permanent magnets and the welding slots are arranged at both ends of the splicing joints. After splicing, the magnetic circuit integrity of the rotor core is ensured, the structural strength is ensured, and the magnetic permeability and mechanicalproperties of the rotor core are not affected. The invention also discloses an outer rotor motor, a driving motor for an electric vehicle and a method for manufacturing the rotor core.

The invention discloses a micro-stroke, double-redundancy torsion-preventive LVDT displacement sensor, and belongs to a displacement sensor. The sensor comprises first and second coil assemblies, a magnetic insulation pad, an iron core assembly, a sleeve, a casing, a leading-out wire and an end cap, the first and second coil assemblies and the magnetic insulation pad are mounted in the casing, one end of the iron core assembly is sleeved by the first and second coil assemblies and the magnetic insulation pad, the magnetic insulation pad is positioned between the first and second coil assemblies, the other end of the iron core assembly is suspended beyond the casing, one end of the sleeve is sleeved among the first and second coil assemblies and the magnetic insulation pad, the other end of the sleeve is suspended outside the casing, one end of the leading-out wire is lead out of the second coil assembly, penetrates the magnetic insulation pad and is fixed to the first coil assembly, and the other end of the leading-out wire penetrates out of the casing. The sensor has the advantages of double redundancy, torsion prevention, high stability and high withstand voltage.

The invention provides a novel conductive roller device which aims at overcoming the defect that when a conductive roller of a soft-melting section of electrotinning is energized with AC, the conductive roller emits heat due to electromagnetism induction phenomenon; the novel conductive roller device is adopted especially at the position of a bearing seat or a bearing; pressing roll devices 1 are installed at the two sides of a stander 2, electricity collecting rings 4 are arranged at the two ends of the conductive roller; a bearing end cover 5, the bearing seat, the conductive roller 9 and a carbon brush device 10 are positioned at the lower side of the electricity collecting rings 4; the bearing seat comprises an upper part and a lower part which are an upper bearing seat 6 and a lower bearing seat 7 that are separated from each other by an insulation board, the material of which has magnetic insulation property; furthermore, the bearing seat is made of the material with the magnetic insulation property, and the bearing is also formed by the material with the magnetic insulation property; the bearing end cover 5 is made of the material with the magnetic insulation property, so that a ring-shaped magnetic field is avoided being formed, and the heat emitting phenomenon is prevented, thus greatly improving the working condition of the bearing, increasing the production efficiency, and saving the time and the production cost.

A three-dimensional planar magnetic sensor comprises a first magnetic sensor, a second magnetic sensor, a third magnetic sensor and a circuit. The first magnetic sensor, the second magnetic sensor and the third magnetic sensor are arrange on the same plane and respectively measure component of a magnetic field in the first, second and third directions, and the third direction is perpendicular to the first direction and the second direction. The third magnetic sensor comprises a third fixed layer, a third magnetic insulation layer and a third free layer, wherein the magnetization direction of the third fixed layer is the third direction or the reverse direction, the spontaneous magnetization of the third free layer is the first direction and the second direction or inclines to the third direction by 0-180 degrees, the magnetic resistance value is an intermediate value in the spontaneous magnetization direction and changes along with the magnetic field. The three-dimensional planar magnetic sensor is manufactured by the semiconductor processing technology without vertical binding, output and durability are improved, and cost and time are saved.