1493results about "Dynamo-electric machines" patented technology

A blood pressure monitoring system, comprising: an exciter configured to produce an acoustic signal, the exciter being provided on a first substrate portion; a detector spaced apart from the exciter, the detector being configured to detect the acoustic signal and to produce an electrical output signal, the detector being provided on a second substrate portion that is mechanically or acoustically decoupled from the first substrate portion, wherein the detector comprises at least four detectors; and a processor configured to determine a blood pressure measurement from the electrical output signal.

The invention belongs to the technical field of electromagnetic induction and friction nanometer power generation, and particularly relates to a vibration energy collector based on electromagnetic induction and friction nanometer hybrid power generation. Comprising a friction nanometer power generation unit and an electromagnetic induction unit. The friction nanometer power generation unit comprises an upper insulating support plate, a lower insulating support plate and a friction pair; the friction pair comprises an upper friction assembly and a lower friction assembly, and the upper friction assembly and the lower friction assembly trigger the contact and separation process through external vibration to achieve friction electricity generation. The electromagnetic induction unit comprises a coil, a magnet and a steel body which are sequentially nested, the coil and the magnet are fixedly connected with the upper friction assembly and the lower friction assembly respectively, the steel body is fixedly connected with the lower insulation supporting plate, the magnet and the steel body form a closed magnetic circuit, and the magnet and the coil trigger relative movement through external vibration to achieve electromagnetic power generation. The device is novel in structure and distinct in gradation, integrates a triboelectrification effect and an electromagnetic induction principle, has high-voltage output and high-current characteristics, and can efficiently realize continuous conversion from environment vibration energy to electric energy.

A power transmission line vibration energy collection device based on a triboelectricity-electromagnetic effect belongs to the technical field of power transmission line self-powered equipment, and comprises a shell, a wire clamp device, a triboelectricity unit, a vibrator structure and a cantilever beam structure, and can collect multi-frequency and multi-amplitude vibration energy of a power transmission line in the vertical direction. And the cantilever beam-magnetic coupling structure is adopted to improve the low-order modal frequency, so that the vibration frequency response range of the self-powered device is widened, and the self-powered device has the following advantages that 1, efficient low-frequency energy collection is realized, and the vibrator structure can effectively collect low-frequency vibration energy by virtue of the gravity of the vibrator structure and the action of the supporting spring; 2, the fatigue resistance is excellent, and the cantilever beam does not directly participate in excitation of the triboelectric energy harvesting unit, so that the risk of fatigue fracture of the cantilever beam is effectively reduced; and 3, the energy collection capability of the device is improved, and friction electricity energy harvesting and electromagnetic energy harvesting are combined, so that the collection efficiency of high-frequency excitation energy can be further improved.

The invention relates to a lens driving module and a camera module. The lens driving module is used for bearing an optical lens and comprises a base; the lens carrier is movably arranged on the base; the driving assembly is configured to drive the lens carrier to move relative to the base; the correction assembly comprises correction magnets and correction magnet yokes, one of the correction magnets and the correction magnet yokes is arranged on the lens carrier, the other correction magnet yoke is oppositely arranged on the base in the first direction parallel to the optical axis of the optical lens, and each correction magnet yoke comprises a first correction magnet yoke and a second correction magnet yoke which are arranged at intervals in the width direction of the lens carrier; the length of the first correction magnet yoke is larger than that of the second correction magnet yoke, the projection area of the first correction magnet yoke on the correction magnet in the first direction is larger than that of the second correction magnet yoke on the correction magnet in the first direction, and the center line of the correction magnet penetrates through the first correction magnet yoke. The influence of deflection torque on the movement of the lens carrier is reduced.

According to the present invention there is provided an active vibration control system comprising: an electromagnetic actuator and a control element, the electromagnetic actuator being operable to apply a force on a base structure to which the active vibration control system is attachable such that vibrations of the base structure are actively controllable by the application of said force, wherein the electromagnetic actuator and control element are relatively moveable such that the active vibration control system has at least two modes of vibration, and wherein movement of the electromagnetic actuator causes movement of at least a part of the control element.

The invention discloses a driving device and a camera module, and the driving device comprises a first frame which carries an optical element, and the optical element is provided with an optical axis; the first frame is movably arranged on the second frame; the at least one first driving assembly is suitable for driving the first frame to move in the direction perpendicular to the optical axis relative to the second frame, the first driving assembly comprises at least one anti-shake coil and at least one anti-shake magnet which are oppositely arranged, one of the anti-shake coil and the anti-shake magnet is arranged on the first frame, and the other one is arranged on the second frame; the anti-shake coil comprises a first effective section and a second effective section, the first effective section and the second effective section are arranged on the two adjacent sides of the anti-shake magnet respectively, when the anti-shake coil is powered on, the first effective section and the anti-shake magnet generate first driving force, and the second effective section and the anti-shake magnet generate second driving force. The first driving force and the second driving force jointly drive the anti-shake coil and the anti-shake magnet to generate relative displacement in the direction perpendicular to the optical axis.

The present invention involves method and system for contactless bidirectional transfer of power between DC source (3700) and rotor coils of electric motor-generator by simultaneous bimodal capacitive and inductive power transfer of high frequency power signals from resonators (3545) stationary with respect to the motor-generator stator to resonators (3585) on the motor-generator rotor according to an adjustable transfer mode ratio at a variable resonant power signal oscillation frequency. Power from DC source is converted into high frequency power signals by high frequency continuous auto-adjusting bimodal stator transmitter-receiver modules under control of systems controller (3572) and provided to corresponding one or more high frequency stator resonators. High frequency power signals received by high frequency rotor resonators are converted in corresponding high frequency auto-adjusting bimodal rotor transmitter-receiver modules to electrical signals to provide to drive circuitry of induction coils on rotor.

An optical element driving mechanism is provided and includes a fixed assembly, a movable assembly and a first driving assembly. The movable assembly is movable relative to the fixed assembly. The first driving assembly is configured to drive the movable assembly to move relative to the fixed assembly. The optical element driving mechanism further includes a first opening, and an external light beam travels along a first axis to pass through the first opening.

The invention provides a multi-path vibration energy collection device, and the device comprises a mass block which can generate relative movement under the excitation effect; the piezoelectric cantilever beams are arranged on the two transverse sides of the mass block and used for responding to high-frequency micro-amplitude vibration energy; the permanent magnet assembly is fixed in the moving direction of the mass block and is matched with the induction coil to realize magnetoelectric energy conversion; the piezoelectric cantilever beam is connected with the bridge rectifier and the thyristor threshold trigger circuit 1, and the permanent magnet assembly is connected with the bridge rectifier and the thyristor threshold trigger circuit 2 to form a double-independent energy collection channel. The method has the following advantages: (1) a path orthogonal decoupling design is adopted, so that a structure and energy dual-independent acquisition path is realized; (2) the energy conversion efficiency is improved based on a coupling response mechanism of mass block inertia driving; and (3) a thyristor threshold triggering mechanism realizes micro-energy efficient conversion, and the output is stable and reliable.

The utility model relates to the technical field of motors, in particular to a coreless motor with a split type Hall plate, which comprises a motor body and the split type Hall plate arranged in the motor body. The split type Hall plate comprises a winding leading-out PCB, a connecting support and a Hall plate, the winding leading-out PCB is fixedly connected in the motor body, the Hall plate is connected to the connecting support, and the connecting support is connected to the winding leading-out PCB. Compared with the prior art, the coreless motor with the split type Hall plate can effectively solve the problems that the Hall plate of the existing coreless brushless motor has a short circuit risk of scratching a coil lead in alignment and is inconvenient to maintain.

The present invention discloses a superconducting motor quench detection method and apparatus based on rotational symmetry of a motor, belonging to the technical field of superconducting motor quench detection. The method includes: acquiring terminal voltages of each group of superconducting magnets in a superconducting motor, where the superconducting motor is pre-divided into at least two unit motors by using the rotational symmetry of the motor, and superconducting magnets located at corresponding positions are selected from the at least two unit motors as a group of superconducting magnets; calculating an absolute value of a terminal voltage difference of each group of superconducting magnets; and judging whether the absolute value exceeds a preset threshold, and if the absolute value exceeds the preset threshold, determining that the superconducting magnets are in a quench state. According to the present invention, induced voltages coupled by the terminal voltages of superconducting magnets are eliminated.

The invention relates to the technical field of power transmission line self-energy-taking, and discloses a power transmission line self-energy-taking device and a state detection system, and the device comprises a housing structure, a motion structure, an electromagnetic power generation structure, and a friction power generation structure. Wherein the moving structure is composed of a permanent magnet, a spring and a fixing groove, the vertical shell and the fixing groove are connected through the spring, and a spring mass vibration system is constructed; the electromagnetic power generation structure generates power through relative movement of a permanent magnet and a coil. The friction power generation structure generates power through sliding separation of sliding electrodes on the side faces of the fixing grooves and electrodes in the side shells. The invention further discloses a state detection system, vibration energy is collected through the device and stored in an energy storage battery through an energy management circuit to supply power to a sensor detection circuit, and data are sent to an upper computer through a wireless transmission module. The power transmission line state real-time detection without external energy supply can be realized, and the problem of power supply of monitoring equipment in remote areas is solved.

The invention relates to a self-energized acceleration sensor system based on a wind-induced vibration pick, and the system comprises a wind-induced vibration energy collection module which is used for collecting wind energy, converting the wind energy into vibration energy, and transmitting the vibration energy to an energy conversion and storage module; the energy conversion and storage module is used for realizing energy conversion and storage through piezoelectric-electromagnetic-triboelectric hybrid conversion and self-adaptive impedance matching based on vibration energy; the multi-parameter sensing module is used for monitoring acceleration, wind speed and tower body deformation based on the electric energy provided by the energy conversion and storage module; and the control management module is used for managing the wind-induced vibration energy acquisition module and the energy conversion and storage module according to monitoring data of the multi-parameter sensing module. The system can make full use of low-medium speed wind power resources in the northeast region, solves the power supply problem of a traditional sensor, improves the monitoring precision and environmental adaptability, and is suitable for long-term monitoring of complex environments such as power transmission towers.

A magnetic field propulsion unit generates a drive force when being arranged in an external magnetic field. The magnetic field propulsion unit includes a support structure, a magnetic field generating device attached to the support structure and configured to generate a first magnetic field, an energy supply unit, and a control unit. The energy supply unit provides the magnetic field generating device with electrical energy. The control unit controls the energy supply unit so that the energy supply unit supplies energy to the magnetic field generating device. The control unit supplies varying current to the magnetic field generating device. The magnetic field generating device has a central axis and is arranged in the external magnetic field such that the central axis is inclined with respect to magnetic field lines of the external magnetic field at an angle different from 0°, 90°, 180°, and 270°.

A method is proposed for determining a zero-force reference position of a wet-running brush actuator (2) for external excitation of a rotor of an electric motor (EM) arranged on a rotor shaft (RW). While an electric vehicle with an electric motor (EM) is stationary and the rotor is externally excited, a spindle (10) of the brush holder (2), which has an electric stepper motor (4) with an integrated spindle drive, is moved away from the grinding brushes (B1, B2) until the contact between the grinding brushes (B1, B2) and the associated slip rings (SR1, SR2) reaches a contact quality limit, the position assumed by the spindle (10) being defined as the zero-force reference position, from which the steps of the stepper motor (4) are counted in order to variably press the grinding brushes (B1, B2) against the slip ring (SR1, SR2) as required. In addition, a computer program, a computer program product, a system, and an electric vehicle are proposed.

An optical module is provided. The optical module includes a housing; a rotation holder disposed in the housing, and configured to rotate about a first rotational axis; a reflection holder on which an optical member is mounted, and supported by the rotation holder, and configured to rotate about a second rotational axis perpendicular to the first rotational axis; a rotational axis ball disposed between the housing and the rotation holder and forming the first rotational axis; a first sensing magnet disposed on the rotation holder in a position spaced apart from the rotational axis ball in a direction, perpendicular to both the first rotational axis and the second rotational axis; and a first position sensor disposed on the housing in a position spaced apart from the rotational axis ball in the direction perpendicular to both the first rotational axis and the second rotational axis.

A slip ring arrangement according to the invention for an electric machine comprises a first slip ring module, comprising a first slip ring for electrical contact, a first conductor extending axially from the slip ring and electrically connected to the first slip ring, and a substantially hollow cylindrical first support element. The first slip ring is arranged on the support element in a first axial section on a radial outer surface. In a second axial section, the first conductor is enclosed by the first support element between a radial inner surface and a radial outer surface. Furthermore, a circumferential first web is arranged on the outer surface between the first axial section and the second axial section. The invention further comprises a rotor of a separately excited synchronous machine.

The invention discloses a traffic energy double-end interconnected multiplexing type high-entropy energy device and a control method, and relates to the technical field of road energy collection. The system comprises a high-entropy energy collection module which is used for capturing physical form change energy generated when a vehicle passes through a road and converting the physical form change energy into electric energy; the central controller is electrically connected with the high-entropy energy collection module and used for energy monitoring and switch control; the road Internet of Things devices are arranged on the two sides of the road and connected with the central controller through underground cables; the energy storage modules are arranged on the two sides of the road and connected with the central controller through underground cables; and the power grid interface module is bidirectionally connected with the central controller and a power grid end through an underground cable. Various high-entropy physical energy generated by temperature difference, pressure, vibration and the like can be collected in the vehicle running process and converted into electric energy in real time, and cooperative scheduling and efficient utilization of multi-source energy are achieved through intelligent interconnection with road Internet of Things equipment, energy storage devices on the two sides of a road and a power grid.

This specification describes a transducer configured to convert electrical signals into vibrational movement. The transducer comprises an axially-magnetised reciprocating magnet, wherein the axially-magnetised reciprocating magnet comprises an aperture such that the reciprocating magnet has an inner boundary and an outer boundary.The transducer further comprises at least two pairs of concentrically positioned electromagnetic solenoids, the at least two pairs of concentrically positioned electromagnetic solenoids being configured to drive the reciprocating magnet to reciprocate in a volume above and below the reciprocating magnet. The first solenoid of each of the pairs of concentrically positioned electromagnetic solenoids is positioned to influence the reciprocating magnet at the inner boundary more than at the outer boundary, and a second solenoid of each of the pairs of concentrically positioned electromagnetic solenoids is positioned to influence the reciprocating magnet at the outer boundary more than at the inner boundary. The reciprocating magnet is suspended in the mid-point of its axial travel at a null position using either mechanical springs or magnetic springs.

The invention relates to a fiber yarn, a fiber bundle, a conducting ring, a preparation method of the conducting ring, a motor and a vehicle. The fiber yarn comprises a yarn core, a conducting layer and a bundling layer. The conductive layer covers the peripheral surface of the wire core; the bundling layer coats the peripheral surface of the conductive layer, and the bundling layer is a water-soluble material layer; wherein the bundling layer is configured to be connected with the bundling layer of the adjacent fiber filaments. According to the technical scheme, the bundling layer of each fiber is configured to be connected with the bundling layer of the adjacent fiber, so that all the fibers in each fiber bundle can be bundled into a whole, the stiffness of the fiber bundle is improved, the situation that the fiber bundle is prone to deformation when inserted into the ring body assembly is avoided, and the service life of the fiber bundle is prolonged. Therefore, the smoothness of inserting the fiber bundle into the ring body assembly is improved, and the efficiency of fixing the fiber bundle on the ring body assembly can be improved.

The invention discloses a miniature optical scanning device and an electromagnetic driving optical scanning device, the optical scanning device comprises a reflecting mirror, an elastic sheet, a gasket and a permanent magnet, the reflecting mirror is a sheet-shaped element used for reflecting light or changing the light beam propagation direction; the gasket is fixed on the back surface of the reflecting mirror; the elastic sheet comprises a fixed part, an elastic working part and a connecting part, and the connecting part is fixed on the gasket; the fixing part of the elastic sheet is used for being fixedly connected with an external carrier; the elastic working part comprises an elastic structure which can be bent and deformed or bent and deformed, and the reflecting mirror can be driven to rotate back and forth or vibrate around a rotating shaft through bending deformation or bending deformation of the elastic working part; the permanent magnet is fixed on the back surface of the reflecting mirror and is nested in the connecting part of the elastic sheet and the gasket; the internal stress can be effectively reduced, the scanning angle is increased, the service life problem of a product is solved, and the product cost is reduced.

A reflective member driving device including a housing; a holder which is disposed within the housing; a reflective member which is disposed in the holder; a moving plate which is disposed between the housing and the holder; a driving magnet and a sensing magnet which are disposed in the holder; a coil which electromagnetically interacts with the driving magnet; and a first sensor which senses the sensing magnet. The driving magnet includes a first magnet which tilts the reflective member about a first axis and a second magnet which tilts the reflective member about a second axis perpendicular to the first axis. The sensing magnet is disposed at a location where the sensing magnet does not electromagnetically interact with the coil.

The utility model relates to the field of conducting rings, in particular to a conducting ring for an oil cooling shaft, which comprises a conducting ring casting, the conducting ring casting is of an annular structure, the inner wall of the conducting ring casting is fixedly connected with a mounting ring, carbon fiber yarns which are arranged at equal intervals are mounted on the mounting ring, and shaft static electricity is transmitted to the conducting ring casting through the carbon fiber yarns. According to the utility model, shaft static electricity generated by the motor rotating shaft is transmitted to the conductive ring casting by using the carbon fiber yarns and is further transmitted to the motor shell, so that the shaft static electricity is effectively prevented from being accumulated on a bearing or other conductive parts, the risks of local overheating and bearing abrasion are reduced, the operation reliability of the motor is remarkably improved, and the service life of the motor is remarkably prolonged. Through the arrangement of the rubber oil baffle plate, not only is excessive engine oil prevented from being in contact with the carbon fiber yarns, but also the rubber oil baffle plate is convenient to replace and clean through the detachable locking nut and positioning block structure, and the maintenance cost and time are reduced.

The utility model relates to the technical field of vibration motors, and discloses a horizontal linear vibration motor, which comprises a shell with an accommodating space, a vibrator assembly and a stator assembly, the vibrator assembly and the stator assembly are vertically accommodated in the accommodating space at intervals, and the shell comprises a cover plate fixed with the stator assembly and an upper shell fixed with the vibrator assembly. An accommodating space is defined by the upper shell and the cover plate; the vibrator assembly comprises a cuboid mass block with a mounting groove, and a magnetic steel assembly fixed on the mass block and embedded in the mounting groove; the stator assembly comprises first auxiliary magnetic steel fixed on the cover plate and a coil arranged around the first auxiliary magnetic steel; second auxiliary magnetic steel is fixedly arranged at the position, corresponding to the first auxiliary magnetic steel, of the upper shell. The magnetic steel assembly comprises a first magnetic steel and a second magnetic steel which are arranged in parallel left and right, and a third magnetic steel and a fourth magnetic steel which are clamped between the first magnetic steel and the second magnetic steel and are stacked up and down corresponding to the position of the first auxiliary magnetic steel. The six-magnetic-steel structure of the vibration motor not only effectively reduces the stress of the elastic piece, but also has stronger vibration sense.

A composite generator for collecting multidirectional vibration energy of a power transmission line belongs to the technical field of generators and comprises an energy collecting body and a wire clamp. A vibrator, an interference assembly and a triboelectric unit are installed in the energy collection body. The friction electrode layer I and the friction electrode layer II of the friction electricity unit generate friction electricity in the oscillation process of the vibrator, the energy conversion efficiency in the low-frequency vibration environment is remarkably improved through the composite structure of the friction electricity and the electromagnetic unit, and the application range of the designed mechanism is widened through complementarity of the two energy harvesting technologies. According to the invention, the bistable effect and the two-degree-of-freedom spring mass system are utilized, so that efficient energy collection in a broadband vibration environment is realized; the structural design is optimized, the cantilever beam only participates in vibration of the vibrator and does not directly participate in contact or separation of the energy harvesting unit, the fatigue fracture risk is reduced, and the service life of the device is prolonged; the structure is compact, the triangular structure can adapt to excitation energy from multiple directions, and the energy supply requirement of the nodes of the Internet of Things is met.

The present application provides a linear vibration motor, including a casing, a stator and a vibrator accommodated in the casing, and an elastic member for suspending the vibrator in the casing. The vibrator includes a mass block having a through-hole, and a magnetic circuit system. The magnetic circuit system includes a first magnetic steel arranged on one side of the stator and a second magnetic steel arranged on the other side of the stator. The first magnetic steel and the second magnetic steel are extended in parallel and arranged centrally symmetrically around a geometric center of the stator. The first magnetic steel includes a first magnetic steel portion, and the second magnetic steel includes a second magnetic steel portion. The asymmetric magnetic circuit structure can improve the nonlinear vibration when the stator is offset during the arrangement, which is helpful for improving the stability and yield of the test.

The utility model provides an automatic reversing box of a climbing mechanism, which comprises a lower cover plate and an upper cover plate, a plurality of vertical wall plates are fixedly mounted between the lower cover plate and the upper cover plate, a climbing head shaft is rotatably mounted among the wall plates, a hammer-shaped climbing head is fixedly mounted on the climbing head shaft, and one end of the climbing head shaft is fixedly connected with an output shaft of a stepping motor; the stepping motor is fixed on the outer wall of the wall plate; the conical end of the hammer-shaped climbing head is hinged to one end of the spring buffer, and the other end of the spring buffer is hinged to the wall plate through the spring buffer seat plate. According to the reversing box, the PLC controls the stepping motor to conduct intelligent reversing, so that the problems that an existing reversing box needs manual reversing and is not high in safety performance are solved, and the defects of the climbing automatic reversing box are overcome.

Provided is a vibration actuator including: a movable body including a magnet having a pillar shape; and a fixing body including a coil and a main body part. The main body part includes an inner peripheral surface, which surrounds the movable body with a gap between the inner peripheral surface and an outer peripheral surface of the movable body inside the coil, and supports the movable body via an elastic support part such that the movable body is vibratable in an axial direction of the movable body. The vibration actuator is configured to cause a flow of a fluid in a direction opposite to a direction of movement of the movable body in the gap and to generate a pipe resistance to the fluid.

The invention discloses a vibration energy recovery framework and a control method, and belongs to the technical field of vibration control, the vibration energy recovery framework comprises a mounting shell mounted on a rack, one end of the mounting shell is connected with a guide rod, the guide rod is slidably connected with a mass block, the mass block is fixedly provided with a permanent magnet, the permanent magnet is used for generating a magnetic field, and the magnetic field is used for generating vibration energy. The guide rod is sleeved with a damper shell, and a coil is wound on the damper shell. The vibration energy recovery device has the advantages that vibration energy is recovered while vibration is reduced, and energy conservation and emission reduction are achieved.

The utility model belongs to the technical field of vibration generators, and relates to a linear vibration motor and electronic equipment, the linear vibration motor comprises a housing, a vibrator assembly accommodated in the housing, and a stator assembly and an electromagnetic damping member which are fixedly connected with the housing and used for driving the vibrator assembly to vibrate; the magnetic circuit system comprises at least two pieces of side magnetic steel and at least one piece of center magnetic steel, the magnetizing directions of the two adjacent pieces of side magnetic steel are opposite and perpendicular to the vibration direction, the center magnetic steel is clamped between the two adjacent pieces of side magnetic steel, and the thickness of the center magnetic steel is smaller than that of the side magnetic steel in the first direction. The center of gravity of the central magnetic steel is closer to the electromagnetic damping piece than the center of gravity of the side magnetic steel, the magnetizing direction of the central magnetic steel is parallel to the vibration direction, and the polarities of the ends, close to each other, of the central magnetic steel and the two adjacent side magnetic steel are the same. The structure not only can improve the electromagnetic damping effect, but also can maintain the magnetic field intensity on one side of the coil.