10results about How to "Increase the air gap" patented technology

The invention discloses a low-noise direct-current motor for an electric drive system of a new energy automobile, belongs to the technical field of motors, and aims to solve the problem that an existing motor can only break through the limitation of counter electromotive force on the rotating speed through complex design and complex control. A second coil is electrified to generate magnetism to attract a permanent magnet ring, at the moment, the permanent magnet ring moves downwards, a connecting rod, a sliding seat, an extrusion plate and a locking mechanism move downwards together, a neodymium iron boron magnet moves outwards under the action of centrifugal force and the electrified mutual exclusion action of a stator coil, an air gap is increased after movement, and back electromotive force is reduced. When climbing or manually controlled speed reduction occurs, the current direction of a second coil is changed, a permanent magnet ring, a connecting rod and a sliding seat move upwards, an extrusion plate extrudes a pressed plate towards the inner side, so that the pressed plate, a sliding shaft and a neodymium-iron-boron magnet move towards the inner side, at the moment, the rotating speed is in a low-rotating-speed state, and the high-torque state is still kept; the structure is simple and control is convenient.

The invention relates to a miniature transformer suitable for a low-power-consumption charger and a rapid assembling method of the miniature transformer. The miniature transformer comprises a fixed iron core and a movable iron core which are arranged on a base, and an air gap is reserved between the fixed iron core and the movable iron core; a limiting seat positioned at one end of the framework is detachably mounted on the base; the movable iron core is positioned between the limiting seat and the framework; a plurality of bimetallic strips are mounted on one side, close to the limiting seat, of the framework, and the bimetallic strips are configured to control the air gap to be increased during temperature rise; a plurality of shape memory alloy springs are arranged between the limiting seat and the movable iron core, and the shape memory alloy springs are configured to be converted into an austenite phase and softened when the temperature rise exceeds the phase change temperature of the shape memory alloy springs; and when the temperature is reduced to the phase transition temperature, the shape memory alloy spring is converted into a martensite phase and recovers elasticity to drive the movable iron core to be far away from the limiting seat, so that the air gap is reduced. According to the invention, the air gap is automatically adjusted along with the temperature rise, and the temperature rise is controlled, so that the electromagnetic efficiency in different load states is ensured.

The invention relates to a connecting wire harness for a battery pack, which comprises a cable, one end of the cable is connected with an external joint for external equipment, and the other end of the cable is connected with a battery end connector; the battery end connector comprises a shell, a crimping type wiring terminal and an electrode column, the crimping type wiring terminal is arranged in the shell, a crimping cylinder of the crimping type wiring terminal is connected with the cable, the electrode column is arranged in the shell in a penetrating manner, and the tail end of the electrode column is vertically connected with the connecting end of the crimping type wiring terminal; a front end blind hole with a conical bottom face is formed in the front end face of the electrode column, the edge of the front end face of the electrode column extends forwards to form a sector-ring-shaped sector-ring column which is coaxial with the front end blind hole, the axial section of the sector-ring column is an inclined face inclining outwards in the axial direction, and the position, connected with the front end face of the electrode column, of the axial section of the sector-ring column is chamfered. According to the invention, the arc discharge problem can be well inhibited while the connection stability is ensured, and the safety is improved.

This utility model discloses a mover structure and a linear motor. The mover structure includes a mover yoke and multiple mover units. Each mover unit includes a mover tooth, a winding, a pole shoe, and two first permanent magnets. The pole shoe includes a main body and a side protrusion. Two mounting slots are spaced apart in the pole shoe. Each mounting slot includes a first slot segment and a second slot segment corresponding to the main body and the side protrusion, respectively. The bottom wall of the second slot segment has an opening. The two first permanent magnets are mounted in the two mounting slots. The pole shoe has a first chamfer structure at each edge on the outer side of the main body, at each edge of the mounting slot located at its opening, and at least one edge of the second slot segment located at its opening. This utility model helps to achieve thrust stability as much as possible while maintaining a relatively high thrust density.

The application discloses a high-torque-density double-winding permanent magnet motor based on a magnetic gear effect and relates to the technical field of motors.The application comprises a stator core, a fundamental wave winding, a harmonic wave winding, a modulation unit and a permanent magnet rotor; a half-closed slot is formed in the inner surface of the stator core, two sets of windings which are not coupled and have different pole pairs are placed in the slot, one set of the windings is the fundamental wave winding, and the other set of the windings is the harmonic wave winding; the modulation unit is composed of non-magnetic blocks and magnetic blocks which are alternately arranged along a circumference, is connected with the inner surface of the stator core, and only an air gap exists between the modulation unit and the permanent magnet rotor; the permanent magnet rotor is a magnetic gathering type permanent magnet rotor and comprises a tangential excitation permanent magnet and a magnetic separation slot structure. The two sets of windings can efficiently utilize the harmonic magnetic field and the fundamental wave magnetic field, the independent modulation unit is adopted to realize the optimal modulation ratio of the motor, the single air gap structure is beneficial to improving the working magnetic density of the motor, and the torque density of the motor driving system is effectively increased.

The utility model relates to the field of oil-immersed transformers in the technical field of power equipment, in particular to an American transformer for an energy storage converter station and an energy storage and conversion integrated substation, which comprise an oil tank, a transformer body, a tank cover, a high-voltage bushing, a low-voltage bushing, a control box, a no-load tap switch, a pressure relief valve and a low-voltage copper bar, the high-voltage bushing is arranged at the front part of the transformer body and connected with the transformer body, the low-voltage bushing and the low-voltage copper bar are arranged at the lower part of the transformer body and connected with the transformer body, the control box is arranged at the upper part of the oil tank, the tank cover hermetically covers the oil tank, the pressure relief valve is arranged at the top of the tank cover, and the no-load tap-changer is arranged below the transformer body and connected with the transformer body. In order to better match with the inverter, the low-voltage bushing connected with the transformer body is led out from the bottom of the right side wall of the oil tank, and the height of the led-out wire is consistent with that of an interface of the inverter, so that the use amount of copper bars can be greatly reduced, and the manufacturing cost of the transformer is reduced.

The utility model discloses a radial gas foil bearing capable of independently adjusting circumferential four-direction air gaps. The radial gas foil bearing structurally comprises a bearing sleeve, an air gap adjusting screw rod, a locking screw, a wedge-shaped push block, a supporting tile, a bump foil and a flat foil. The air gap adjusting screw drives the wedge-shaped push block to move axially, so that the position of the supporting tile is adjusted, the bump foil is pushed to be compressed or released, and accurate adjustment of the air gap is achieved; each air gap adjusting screw can independently control the corresponding push block, independent adjustment of air gaps in four directions is ensured, and high precision and flexibility are provided. According to the bearing structure, independent adjustment is achieved through an air gap adjusting mechanism formed by four sets of air gap adjusting screws, wedge-shaped push blocks, supporting tiles and bump foils, the performance of the bearing is optimized, load changes and air film rigidity are adapted, the stability and efficiency of a rotor system are improved, and the bearing structure adapts to various complex working conditions.

The utility model discloses a hollow cup stator motor structure for a fan, which comprises an air duct assembly and a support assembly, a hollow cup stator is arranged between the air duct assembly and the support assembly, a rotor assembly is arranged in the middle of the hollow cup stator, the hollow cup stator comprises an iron core yoke part, and a plastic mounting frame is arranged in the iron core yoke part. And a coil winding is wound on the plastic mounting frame. The coreless stator has the beneficial effects that through the coreless stator without a tooth part structure, air gaps are correspondingly increased under the condition that the size of the rotor is not changed, the rotating speed of the rotor is increased, the efficiency of the motor is improved, and a light load stage curve in the characteristics of the motor is efficiently used.

The invention discloses a preparation method of nano laminated thermal expansion vermiculite paper, which comprises the following steps: weighing oxalic acid powder, thermal expansion vermiculite powder, deionized water and micron-sized ceramic balls in parts by mass, dissolving the oxalic acid powder and the thermal expansion vermiculite powder into the deionized water, and mixing to obtain a thermal expansion vermiculite suspension; adding micron-sized ceramic balls into the thermal expansion vermiculite suspension, then stirring to obtain vermiculite nanosheet paste, pouring the vermiculite nanosheet paste into a round polytetrafluoroethylene mold, fully drying to obtain a vermiculite film, treating the vermiculite film at high temperature, and expanding the vermiculite film to obtain thermal expansion vermiculite paper; the thermal expansion vermiculite paper with a nano laminated structure is prepared to realize integration of flexibility and high temperature resistance, and by regulating and controlling the topological structure of the vermiculite nanosheet to be converted from a planar shape to a folded shape, on one hand, the size of a nano construction unit is hidden, on the other hand, a space is reserved for deformation of the thermal expansion vermiculite paper, and a nano-scale gap is constructed; the heat insulation property of the thermal expansion vermiculite paper is improved.

The invention discloses an energy-saving device for self-adaptive adjustment of motor torque, and belongs to the technical field of motor energy conservation. The armature stator is fixed on the inner circumference of the motor frame, consists of an iron core and a winding wire, and is used for generating a rotating magnetic field; the permanent magnet rotor assembly rotates in the motor frame and is used for interacting with a rotating magnetic field of the armature stator to generate a rotating torque; and the output shaft is rotationally connected to the motor frame and is used for outputting the torque of the permanent magnet rotor assembly. By arranging the air gap adjusting assembly and the permanent magnet rotor assembly, the air gap between the stator and the rotor can change along with the change of the load in a variable-load working environment, and the problem that the air gap between the stator and the rotor cannot change along with the change of the load under the condition that the load of the motor is changed at present is effectively solved. And the output torque and the power of the motor cannot be adaptively adjusted along with the change of the load, so that the electric energy consumption of the motor is relatively high under the condition of variable load.