228 results about "Magnetic rotation" patented technology

Systems and methods for controlling a rotating electromagnetic machine. The rotating machine, such as a permanent magnet motor or hybrid switched reluctance motor, includes a stator having a plurality of phase windings and a rotor that rotates relative to the stator. A drive is connected to the phase windings for energizing the windings. A controller outputs a control signal to the drive in response to an input demand such as a demanded speed or torque. Control methods (which can be implemented separately or in combination) include varying the gain of an estimator as a function of a demanded or estimated speed to position control system poles at desired locations, decoupling control system currents to achieve a constant torque with motor speed, compensating flux estimates of the estimator for saturation operation of the stator, estimating rotor position using averages of sample values of energization feedback, and calculating a trim adjusted speed error from a plurality of speed estimates.

A magnetically driven agitator for a mixture contained in a recipient which agitator is supported by a collar hermetically mounted in a wall of the recipient and which collar is provided with a blind sleeve inside which is housed a drive shaft provided with a first magnetic coupling. A propelling screw is disposed around the blind sleeve and is provided with a second magnetic coupling adapted to cooperative with the first magnetic coupling for driving the propelling screw about an axis of rotation. A third magnetic element carried by the propelling screw is disposed opposite a cell for detecting the movement of the third coupling element during rotation of the propelling screw about the axis of rotation.

This invention relates to one electrical expansion valve, which comprises valve socket, coils connected to the valve cover tube and cover tube, wherein, the valve socket is opened with entrance and exit mouth and valve mouth connected; the said cover tube and valve socket form sealed chamber with one magnetic rotor part to sense the said coil magnetic rotation and to convert into axle direction; the magnetic rotor down end is located with one valve bar to lift with the said valve with top end located inside cover tube to match with brake part; the said valve socket is fixed with one screw and the rotor is set with one wire bar.

A simple circuit configuration without increasing the number of magnetic poles of a magnet can be performed and angular resolution can be improved. The polarities is determined and the absolute values are compared in accordance with the rotation angle of a magnet (1) based on sensor output signals a and b outputted from the magnetic sensors (2) and (3) to produce polarity determination signals c and d and absolute-value-comparison signals e, f, and g. The rotation angle of the magnet (1) is determined based on the polarity determination signals c and d and the absolute-value-comparison signals e, f, and g to output a determination result signal h.

The invention relates to a single-wavelength and single-fiber bidirectional light transceiving module assembly, which comprises a transmitting terminal, a receiving terminal, a common terminal and an optical lens group, wherein the optical lens group comprises a first polarization optical splitter, a second polarization optical splitter, a third polarization optical splitter, a reflecting mirror, a 45-degree half-wave plate, a magnetic ring, a magnetic rotation sheet and a 22.5-degree half-wave plate; a polarization beam at the transmitting terminal passes through the first polarization optical splitter, the magnetic rotation sheet, the 22.5-degree half-wave plate and the second polarization optical splitter, and then is received by the common terminal; polarized light which is incident to the common terminal in the parallel direction passes through the second polarization optical splitter, the magnetic rotation sheet, the 22.5-degree half-wave plate, the first polarization optical splitter, the 45-degree half-wave plate and the third polarization optical splitter and then is received by the receiving terminal; and polarized light in the vertical direction passes through the second polarization optical splitter, the reflecting mirror and the third polarization optical splitter and then is received by the receiving terminal. The single-wavelength and single-fiber bidirectional light transceiving module assembly meets national and international standards completely in the aspect of main performance of light power, isolation, receiving sensitivity and the like, and is compatible with the conventional standard module completely in appearance.

A device for measuring the wear of the contacts of a switchgear device is described. The switchgear device is of the open circuit breaker type with offset pole-shaft, and the movable contact is mounted on a sliding support. Measurement of the wear of the contacts is based on evaluation of the over-travel of the movable contact in the closed position when the latter slides in its support. This over-travel is determined by measuring the residual rotation of the pole-shaft, preferably by a contact-less magnetic rotation sensor.

The invention discloses a multi-wavelength single-fiber bidirectional optical transceiver module and a working method thereof. The multi-wavelength single-fiber bidirectional optical transceiver module comprises a transmitting end, a receiving end, a common end, and an optical transceiver assembly, wherein the transmitting end comprises a laser group, a collimation lens group and a wavelength division multiplexing optical assembly; the receiving end comprises a photodiode group, a convergence lens group and a wavelength division de-multiplexing optical assembly; the common end is the input/output port of an optical signal; the wavelength division multiplexing optical assembly comprises a first total-reflection mirror, a second total-reflection mirror, a first wavelength division multiplexing diaphragm and a second wavelength division multiplexing diaphragm; a wavelength division de-multiplexing optical assembly comprises an optical substrate, a first filter, a second filter, a third filter and a fourth filter; and the optical transceiver assembly comprises a first polarization light splitter, a magnetic rotation optical sheet, a 22.5-degree 1/2 wave plate, a first wave plate, a second polarization light splitter, a second wave plate, and a third polarization light splitter. According to the multi-wavelength single-fiber bidirectional optical module, input and output of multi-wavelength optical signals on the same fiber can be carried out, the size and the cost of the optical transceiver are reduced, the wavelength multiplexing diaphragm is easy to coat, the performance is better, and the cost is low.

The present invention provides a paint wastewater treatment system with characteristics of low investment and low running cost. The paint wastewater treatment system comprises a sewage tank, a flocculation pipeline, a first water pump, a second water pump, an agent addition device, a magnetic separation device and a clear water tank, wherein a water inlet pipe of the magnetic separation device is communicated with the sewage tank through the flocculation pipeline and the first water pump, a water outlet pipe of the magnetic separation device is communicated with the clear water tank through the second water pump, the agent addition device is communicated with the flocculation pipeline, and is sequentially provided with a sodium hydroxide addition device, a polyaluminum chloride addition device, a polyacrylamide addition device and a PF iron powder flocculant addition device along a wastewater flow direction, the magnetic separation device comprises a mud water separation tank provided with a water inlet pipe and a water outlet pipe, a magnetic rotation disc arranged inside the mud water separation tank through a rotation shaft, a mud scraping plate and a residue cleaning region, the rotation shaft is connected with a power device through a speed reducer, and the mud scraping plate is fixed between the residue cleaning region and the magnetic rotation disc, and contacts the magnetic rotation disc.

The invention discloses faraday magnetic rotation transparent ceramic and a preparation method thereof. The structural formula of the transparent ceramic is shown as Tb3-xAxAl5-yByO12, wherein A is Tm, Lu, Y or Gd; B is Sc or Ga; x is more than or equal to 0 and less than or equal to 2.9; and y is more than or equal to 0 and less than or equal to 5. The preparation method comprises the following steps of: preparing raw materials according to the components of the transparent ceramic with the structural formula of Tb3-xAxAl5-yByO12; adding 0.3 to 0.7 weight percent of ethyl orthosilicate serving as an additive; performing ball-milling, drying and tableting on powder; pressing with cool isostatic pressure of over 200 Mpa to obtain a blank body; pre-sintering to remove organic components; and putting the blank body into a vacuum or hot-press sintering furnace for sintering to obtain the magnetic rotation transparent ceramic with the structural formula of Tb3-xAxAl5-yByO12. The ceramic has high optical transmittance and high Verdet constant in a visible-near infrared band. The preparation method has the advantages of simple preparation technology, low cost, nontoxic preparation process and the like.

In a magnetic rotation angle sensor for detecting a rotation angle of a detection target, a yoke covers outer circumferences of a magnet and a Hall device. One of the magnet and the magnetic flux density detection device rotates together with the detection target. The Hall IC is radially shifted from a rotation center of the detection target. The magnetic flux density detection device has a detection surface that is in parallel to one of a tangential direction and a normal direction of a turning circle. The magnet is magnetized in the one of the tangential direction and the normal direction of the turning circle.

The invention belongs to the technical field of equipment for hairy crab cultivation, and particularly relates to a high-efficiency stirring device for hairy crab bait. The high-efficiency stirring device comprises a stirring tank, wherein the stirring tank comprises an upper stirring tank and a lower stirring tank; the upper stirring tank is internally provided with an upper stirring unit for vertically stirring the bait; the lower stirring tank is internally provided with a lower stirring unit for vertically stirring the bait; and the lower stirring tank is further internally provided with a magnetic rotation unit for pushing the upper stirring unit and the lower stirring unit to perform vertical stirring in a magnetic repulsion manner. According to the device, the magnetic rotation unit, in a rotation process, repels and pushes the upper stirring unit and the lower stirring unit sequentially to accomplish stirring operation in a vertical stirring manner through the magnetic rotation unit, and the device has the advantages of being simple and effective in structure, convenient and quick in stirring operation, good in uniform stirring effect, appropriate in stirring intensity and low in energy consumption.

The invention discloses an optical fiber one- and two-way bending curvature double-channel tracking monitor and a monitoring method. The monitor comprises an optical fiber platform deck and optical fiber stress moving platform decks. A bending pond is disposed between the optical fiber stress moving platform decks at two ends. Each optical fiber stress moving platform deck is connected with a force bearing end through force transmission shafts, one side of the optical fiber stress moving platform deck is connected with a connecting rod dial, an auxiliary connecting rod dial is disposed on the connecting rod dial, the other side of the optical fiber stress moving platform deck is fixedly connected with a magnetic rotation optical fiber fastener, a platform deck transverse rail is disposed at the bottom of the optical fiber stress moving platform deck, a platform deck moving passage is arranged at the top of the optical fiber stress moving platform deck, a passage highly-elastic inner ring is disposed outside the platform deck moving passage, a crescent protecting end is disposed outside the passage highly-elastic inner ring, and the crescent protecting end is connected with a support rod through a screwing fixing shaft. The monitor has the advantages that equipment which is reliable, portable and multipurpose is provided for actual projects, and the monitor is efficient, easy to operate, low in cost, scientific and reasonable, multifunctional and high in adaptability.

The invention is suitable for the field of lasers and provides a magnetic rotation assembly capable of adjusting a magnetic field. The magnetic rotation assembly comprises at least one group of magnetic ring arrays. Each group of magnetic ring arrays comprises a first magnetic ring, a second magnetic ring and a third magnetic ring. The first magnetic ring, the second magnetic ring and the third magnetic ring of each group of magnetic ring arrays are stacked up in an axial direction and fixed. At least one Faraday device is arranged in a central hole of each magnetic ring array and fixed. The direction of a first magnetic line of each first magnetic ring is a radial direction pointing towards the outside from the center. The direction of a second magnetic line of each second magnetic ring points towards the axial direction from the left to the right. The direction of a third magnetic line of each third magnetic ring is a radial direction pointing towards the center from the outside. By adjusting axial distances or up-down distances among each first magnetic ring, each second magnetic ring and each third magnetic ring, an adjustment can be made to the magnetic field. The invention further discloses an optical isolator. Therefore, the magnetic rotation assembly capable of adjusting the magnetic field and the optical isolator helps to save cost and ensures ideal angle of rotation by making an adjustment to the magnetic field.

This invention relates to a magnetic optical rotation glass, its components to molar percentage are: Tb2O3: 15 ~35 shares; B2O3 + SiO2: 40 ~ 80; Al2O3: 0 ~ 15; ZnO:0 ~ 30; ZrO2:0 ~ 6; AlF3 + MgF2+CaF2: 0 ~12; TiO2:0 ~ 10; InF3:0.5 ~ 7. First mix the raw materials according to composition; Preheat electric furnace to 1200 to 1300 deg C, add the mixed materials in the platinum crucible, when to 1350 to 1410 deg mix glass liquid for 3~ 5h; Reduce temperature to 1250 to 1350 deg C, pour glass liquid into the mold, precisely annealing in the annealing furnace. This invention use one time melting way, solve the problem of high temperature of glass clarification and leveling in the background technology, Rumsfeld constant is higher than the international common terbium magneto-optical glass, much higher than the magneto-optical glass containing cerium.

The invention relates to a digital optical fiber current sensor. The fundamental principle is that: based on a Faraday magnetic rotation effect, a polarization plane of linearly polarized light passing through a magneto-optical crystal can rotate under the action of the magnetic field of the current and the rotary angle is in direct proportion to the magnitude of the current. The polarization directions of an annular analyzer are distributed uniformly in a radial direction in a 180-degree annular region; the linearly polarized light consistent with a certain polarization direction on the annular analyzer can pass through the analyzer; the linearly polarized light vertical to the polarization direction cannot pass through the analyzer; and therefore, the intensity of the polarized light passing through the analyzer in a certain 90-degree region on the annular analyzer is decreased gradually from maximum to minimum, a light intensity distribution image is formed, the maximum or minimum light intensity position can be found through the analyzing process of a CMOS/CCD image sensor, the rotary angle of the polarized light is determined, and the real-time digital quantity of a current signal is acquired. A current measuring method is linear, so that the method is suitable for the measurement of alternating current and also can be suitable for the measurement of direct current.

The invention discloses a magnetic rotation speed sensor self-checking device and system and a method thereof. The magnetic rotation speed sensor self-checking device comprises a signal processing unit and a magnetic-sensitive device connected with the signal processing unit, wherein the magnetic-sensitive device is used for sensing an alternating magnetic field produced by an external speed measuring gear rotating with a detected object. The self-checking device further comprises a coil arranged at the opposite upper portion of the magnetic-sensitive device, wherein when the detected object is static, an alternating electrical signal is transmitted to the coil and produces the alternating magnetic field at the opposite upper portion of the magnetic-sensitive device, the alternating magnetic field drives the magnetic-sensitive device to output a speed signal to the signal processing unit and judge whether a magnetic rotation speed sensor is normal or not by detecting the speed signal. The detected object is not required to be moved, the technical problem of self checking on the performance of the magnetic rotation speed sensor under the static-state condition can be solved, and the magnetic rotation speed sensor self-checking device and system and the method are wide in application range and simple and accurate in detection.

The invention provides a magnetic rotation conversion straight-moving mechanism. A magnetic wheel consists of a cylindrical permanent magnet and a non-magnetic cylinder that are fixedly connected on a rotation shaft; the cylindrical permanent magnet is filled with the magnetism in the vertical direction; alternatively, the cylindrical permanent magnet is assembled by two semi-cylinders; the magnetic wheel can also consist of a plurality of tile-shaped permanent magnets, magnetic-conductive cylinders and non-magnetic cylinders that are fixedly arranged on the rotation shaft and are alternatively filled with the magnetism in the radial direction with polarity; wherein the tile-shaped permanent magnet can be also replaced by a whole permanent magnetic ring divided into areas in the circumferential direction and alternatively filled with the magnetism in the radial direction with polarity; the rotation shaft is arranged on a frame by a bearing; a permanent magnet filled with the magnetism in the vertical direction is arranged below the magnetic wheel; the bottom surface of the permanent magnet is fixed with a magnetic-conductive plate; the center of the bottom surface of the magnetic-conductive plate is fixedly connected with a connecting rod; and the other end of the connecting rod is connected with a linear movement part. The magnetic rotation conversion straight-moving mechanism has no dead points, no friction, thus having the advantages of high efficiency, lubrication-free, energy-saving and environment-protection, long service life and low cost.

The invention relates to the field of a rotation motor, in particular to an adjustable-magnetic rotation motor. The adjustable-magnetic rotation motor comprises an enclosure, a stator core, a rotor core and a rotation shaft, wherein the stator core is fixed on the enclosure, a stator winding is embedded in the stator core, a plurality of tangential permanent-magnet magnetic steel are arranged in the rotor core, N poles and S poles of the tangential permanent-magnet magnetic steel are alternatively arranged, one end of the rotor core in an axial direction is connected with the rotation shaft, a space is arranged between the other end of the rotor core and the rotation shaft, and a magnetic regulation ring is arranged in the space, can axially rotate and move and is connected with the rotation shaft by a spiral spline. Regulation on effective magnetic flux of a main gap is performed by the magnetic regulation ring, so that the motor has high magnetic regulation capability to further achieve high flux-weakening speed expansion capability; meanwhile, flux weakening of the permanent-magnet motor requiring a large direct-axis demagnetization current is prevented, and high-efficiency and high-power factors of the motor are ensured; and moreover, the permanent-magnet magnetic steel has no demagnetization risk, and the motor reliability is improved.