7 results about "Permanent magnet dc motor" patented technology

The utility model relates to the technical field of permanent magnet direct-current motors, and particularly discloses a permanent magnet direct-current motor structure with a segmented structure, which comprises a shell, and a rotating shaft is embedded and rotatably mounted in the shell; a fixing mechanism is arranged in the shell, and the fixing mechanism is characterized in that a plurality of sleeves are installed on the inner wall of the shell, stators are continuously installed in the sleeves at equal intervals, mica sheets are connected to the tail ends of the sleeves, sliding grooves are formed in the surfaces of one sides of the sleeves in an embedded mode, and springs are installed in the sleeves in an embedded mode. According to the permanent magnet direct current motor structure with the segmented structure, a fixing structure is arranged, stator sleeves are isolated through mica sheets, eddy current loss is reduced, the two sleeves are attached at the same time, a limiting block on one side is inserted into a groove of the sleeve on the other side at the moment, the limiting blocks are clamped with clamping blocks by rotating the sleeves, and therefore the permanent magnet direct current motor structure with the segmented structure is formed. And the two sleeves can be assembled, so that the use convenience of the device is improved.

The application relates to a permanent magnet DC motor and a positioning mechanism, which comprises a base, a permanent magnet motor fixedly arranged in the base, a rotating shaft coaxially arranged in the center of the permanent magnet motor, a rear cover fixed to the axial first end of the base, a front cover fixed to the axial second end of the base, a center positioning mechanism arranged between the rotating shaft and the front cover and the rear cover and used for restraining the radial deviation of the rotating shaft and inhibiting the rotary shaking, the center positioning mechanism comprising a mounting ring coaxially fixed to the inner side of the rear cover and a plurality of groups of sensing pieces uniformly distributed on the inner side of the mounting ring, the sensing pieces each comprising a liquid storage bag, an elastic gasket, a flow pipe, a transfer cylinder and a movable plug, the liquid storage bag being fixed to the inner side wall of the mounting ring, and the elastic gasket being fixedly attached to the side end face of the liquid storage bag facing the rotating shaft. The application realizes the beneficial effect of the passive self-adaptive closed-loop adjustment of the radial deviation of the rotating shaft, the structure triggers the action by the deviation of the rotating shaft itself, can accurately restrain the radial jumping of the rotating shaft in real time, inhibits the rotary shaking, and improves the rotation stability of the shaft system.

The utility model provides an inner rotor brushless permanent magnet direct current motor without a shell shape, which belongs to the technical field of electric tool motors and comprises a motor main body. According to the utility model, the phase power line of the Hall plate assembly is connected with the controller on the equipment, the Hall element of the Hall plate assembly induces the position angle condition of the magnet in the rotor assembly, the controller orderly supplies power to the stator assembly, the motor main body has no rotor core, and the rotor core, the process and the tool do not need to be assembled by stamping; the motor body is compact in structure, small in size and high in applicability, the magnets can be limited and fixed under the arrangement of the first sheath, the second sheath and special glue, and the motor body can be cooled by positive and negative rotation air draft under the arrangement of the axial-flow blades of the rotor fan blades, so that the service life of the motor body is prolonged. Therefore, the problem that the motor main body is easy to fail in a high-temperature environment is solved, and the service life of the motor main body in the high-temperature environment is prolonged.

The invention discloses a three-phase brushless permanent magnet direct current motor which comprises a motor shell, a stator assembly is arranged in the motor shell, a rotor assembly is movably arranged in the stator assembly, a motor rotating shaft is fixedly arranged in the rotor assembly, and the two ends of the motor rotating shaft are arranged in the motor shell through bearings respectively. The motor is characterized in that the stator assembly comprises an installation cylinder, a plurality of installation groove holes are evenly distributed in the installation cylinder in the circumferential direction, stator iron cores are movably arranged in the installation groove holes, coils are wound on the stator iron cores, the air gap sensor is connected with the controller, and the controller is connected with the motor. And a dynamic adjusting mechanism capable of driving the stator core to move so as to adjust the air gap between the stator core and the rotor assembly is arranged in the motor shell. In order to overcome the defects in the prior art, the invention provides the three-phase brushless permanent magnet direct current motor which is simple in structure and can dynamically adjust the air gap according to different working conditions.

An electric control brake valve resistant to magnetic interference comprises a brake valve body, a permanent magnet direct current motor assembly, a controller assembly, a support assembly and a pressure sensor, the controller assembly is used for receiving PWM signals and controlling the permanent magnet direct current motor assembly to rotate forwards and backwards, and the permanent magnet direct current motor assembly is used for providing thrust for generating pressure for the brake valve body; the permanent magnet direct-current motor assembly rotates forwards to enable the brake valve to generate pressure, the permanent magnet direct-current motor assembly rotates backwards to enable the brake valve to reduce pressure, and when the permanent magnet direct-current motor assembly stops rotating, the brake valve keeps outputting pressure. The controller assembly, the permanent magnet direct current motor assembly and the brake valve are connected and fixed through the support assembly by using screws, the pressure sensor is used for detecting the brake pressure of the brake valve and transmitting the brake pressure to the controller assembly, and the electric control brake valve is high in magnetic interference resistance and can effectively improve the safety of a brake system.

The utility model discloses a permanent magnet direct current motor, which relates to the technical field of permanent magnet direct current motors and comprises a stator yoke, a permanent magnet is arranged in the stator yoke, a rotor iron core is further rotatably mounted in the stator yoke, a plurality of iron core grooves are arranged on the rotor iron core, and the number of the iron core grooves is eight. The eight iron core grooves are formed in the periphery of the rotor iron core at equal intervals, the number of the permanent magnets is two, the two permanent magnets are symmetrically installed on the inner side wall of the stator yoke, and the rotor iron core is located between the two permanent magnets; according to the permanent magnet direct current motor, skewed slots, skewed poles, rotor notch width reduction and inner and outer circle non-concentric magnets are not needed, only the pole-arc coefficient of the magnets needs to be selected to be 0.75-0.8, the permanent magnet direct current motor has the advantages of being small in cogging torque, electromagnetic vibration and electromagnetic noise and high in mechanical performance, especially when the pole-arc coefficient is 0.75, the cogging torque is close to 0, the cost performance is high, and the permanent magnet direct current motor is suitable for large-scale popularization and application. And the quality and economic benefits are obvious.

The application relates to the technical field of electric motors, in particular to a double-redundancy slotless brushless permanent magnet DC motor which comprises a shell and two groups of windings installed in the shell, and further comprises: heat dissipation holes arranged on the two sides of the shell; a rotating cylinder which is linearly arranged in the heat dissipation holes from top to bottom; a baffle fixedly installed on the outer side of the rotating cylinder; a groove arranged on the shell and located on one side of the heat dissipation holes; one end of the rotating cylinder movably penetrates the inner wall of the heat dissipation holes and the tail end is located in the groove; a driving assembly arranged in the groove and used for driving the rotating cylinder to rotate; and a dust removal assembly arranged on one side of the baffle and used for removing dust on the surface of the baffle. The double-redundancy slotless brushless permanent magnet DC motor provided by the application realizes the cleaning of the surface of the baffle by the cooperation of multiple components such as the fixed frame, the moving block, the stop block and the positioning spring, so that the cleanliness of the surface of the baffle is ensured.