1165results 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 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.

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 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 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.

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 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.

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.

The invention relates to a work device (1), in particular a tool or garden implement, which, in its intended use, is preferably carried and / or preferably guided with at least one hand by a user. The work device (1) comprises an electric drive motor. According to the invention, the electric drive motor is designed as a linear motor (2).

The utility model relates to the technical field of conductive devices, and discloses a conductive ring suitable for assembly and a motor assembly. The conductive ring comprises a conductive ring main body, and the interior of the conductive ring main body is used for installing a rotating part; and the conductive fibers are uniformly distributed on the outer edge of the conductive ring main body. According to the conducting ring and the motor assembly, the conducting fiber is arranged on the outer edge of the conducting ring body, and the conducting ring rotates along with the rotating piece. The conductive fibers can be straightened under the action of centrifugal force in the following rotation process; the conductive fibers are straightened, so that the contact effect can be guaranteed, interference between the conductive fibers and a static part is effectively reduced, and abrasion is reduced; the conductive fibers can throw oil to the contact position of the conductive fibers and the static part under the action of centrifugal force, lubrication is guaranteed, abrasion is reduced, meanwhile, an oil film can be effectively punctured, effective conduction is guaranteed, and therefore the conductive performance of the conductive ring is improved.

According to the electromechanical transient estimation method and system based on robust H infinite unscented particle filtering, on the basis of a dynamic estimation model of a generator, unscented particle filtering iteration solution is adopted; determining an estimation error covariance matrix by using a positive scalar parameter of a system uncertainty error defined based on a robust H infinity theory, a state prediction error covariance matrix and a cross covariance matrix of a predicted value and a measured value, and updating a Kalman gain; based on the state variable, estimating an error covariance matrix to establish suggested distribution, and resampling from the suggested distribution to obtain a new particle set; updating a dynamic estimation model of the generator by using the corrected system noise covariance matrix and the observation noise covariance matrix, and solving an obtained state variable estimation value by adopting unscented particle filter iteration; taking the state variable estimation value and the weighted mean value of the weight thereof as an electromechanical transient estimation result of the generator; the problems of accuracy and robustness caused by communication noise and uncertainty of model parameters in the dynamic estimation process of the generator are solved.

The present invention is a mechanical energy harvesting generator of electricity, comprising a coil structure including a winding of an electrical conductor disposed over a coil length, and capable of inducing electricity therein in the presence of a moving magnetic field provided by a movable magnet, wherein the winding includes an aperture about which the electrical conductor is wound and having a path through the coil structure substantially parallel with the length that receives the movable magnet. A magnet is disposed to be movable in response to motions applied externally to the coil structure along the path through the coil aperture, and having magnetic poles disposed to provide the moving magnetic field experienced by the coil as the magnet is moved along the path, further characterized in that a metallic glass layer is disposed around the coil structure and a winding outer surface.

A slip ring arrangement according to the invention for an electric machine comprises a first slip ring, a first contact pin which forms an electrically conductive sliding contact with the first slip ring, and a first conductor extending axially from the first slip ring and electrically connected to the first slip ring. The slip ring arrangement further comprises a substantially hollow cylindrical first support element which has a first axial inner surface at a first axial end, forming a first rib extending radially inwards, wherein the first slip ring is arranged on the first axial inner surface. The first conductor is enclosed between a radial inner surface and a radial outer surface of the first support element. The first contact pin is guided axially displaceably within a second support element and can be subjected to force or is subjected to force in a first axial direction.The second support element is arranged within a volume defined radially by the radial inner surface of the first support element. The second support element is rotatably arranged relative to the first support element. The invention further comprises a rotor of a separately excited synchronous machine.

The novel magnetic suspension bearingless motor comprises permanent magnet rotors, a main shaft and a stator assembly, the two permanent magnet rotors are coaxially arranged along the axial direction, the two permanent magnet rotors are respectively and fixedly connected with the main shaft, the number of magnetic poles of the two permanent magnet rotors is the same, and the arrangement directions of the magnetic poles are the same. The two stator assemblies are located on the outer sides of the two permanent magnet rotors respectively, and the two stator assemblies drive the two permanent magnet rotors to suspend and rotate through magnetic force respectively. The two stator assemblies correspond to the permanent magnet rotors respectively, two independent magnetic circuits are formed, the total electromagnetic force borne by the permanent magnet rotors is improved, and therefore under the condition that the sizes of motors are the same, larger power is provided for a main shaft, and the flow and lift of a pump are improved.

The invention discloses a device for converting mechanical energy into electric energy, relates to the technical field of energy collection, and aims to solve the problems of unbalanced voltage and current output characteristics and low energy recovery efficiency in the traditional single-mode energy capture technology. Mechanical vibration is converted into electric energy through the direct piezoelectric effect; an electromagnetic energy harvesting module is further arranged in the shell, and electricity is generated according to the electromagnetic induction principle; the frequency self-tuning mechanism is connected with the electromagnetic energy harvesting module and is used for adaptively adjusting the frequency response range of the electromagnetic energy harvesting module according to the vehicle speed and the road condition change; the energy collection circuit board is connected with the output end of the piezoelectric energy harvesting module and the output end of the electromagnetic energy harvesting module and used for converting collected alternating current into stable direct current. Through a piezoelectric and electromagnetic composite structure, collaborative improvement of output voltage and current is achieved, the frequency response range is widened through the frequency self-tuning mechanism, and self-adaptive efficient energy capture of broadband vibration is achieved.

A magnified linear power generation system includes a vehicle with a tractor, or other tow vehicle, and a trailer, the trailer being separable from the tractor, the vehicle including at least one force receiving surface, the force receiving surface receiving input forces from the ground as the vehicle moves across the ground. A power generator is mounted to the trailer, the power generator including a stator and a mover. A mechanical magnification component is coupled between the power generator and the vehicle, the mechanical magnification component including a first hydraulic cylinder connected to the force receiving surface and a second hydraulic cylinder connected to the power generator, the first hydraulic cylinder having a first cylinder diameter, the second hydraulic cylinder having a second cylinder diameter smaller than the first cylinder diameter, wherein the first hydraulic cylinder is connected to the second hydraulic cylinder by a hydraulic line extending between the tractor and the trailer.

The application provides a kind of energy storage device, it relates to energy conversion technical field.The energy storage device includes: annular energy storage coil;Permanent magnet is configured to be able to move relative to energy storage coil along the axial direction of energy storage coil;Annular compensation coil is coaxially sleeved on the periphery of permanent magnet, and is configured to move synchronously with permanent magnet, and the magnetic flux of energy storage coil changes and generates induced current in the process of approaching energy storage coil: mechanical energy is converted into electromagnetic energy and is stored;Compensation coil is configured to generate the same magnetic field as the magnetic field direction of permanent magnet, to compensate the reverse magnetic flux generated by energy storage coil under the action of permanent magnet.

This utility model discloses a low-power wireless sensor network monitoring device, including a housing, a signal transmitting mechanism, and a vibration monitoring mechanism. A fixed base is fixedly installed at the lower end of the housing, and the signal transmitting mechanism is fixedly installed at the upper end of the housing. The probe moves up and down along the inner wall of the fixed base due to the amplitude of the vibration. During the movement of the fixed base, the magnet at its upper end moves along the trajectory, thereby moving up and down inside the induction coil boss. In this process, electrical energy is generated. At the same time, the vibration monitoring mechanism detects the vibration signal. The electrical energy generated by the triggering mechanism and the vibration signal detected by the vibration monitoring mechanism are both transmitted to the signal transmitting mechanism. The electrical energy is used to wake up the signal transmitting mechanism and enable it to transmit the signal detected by the vibration monitoring mechanism. After the signal is transmitted, the signal transmitting mechanism enters sleep mode again, so that the device only transmits signals when vibration occurs, which greatly reduces the energy consumption of the device and allows the device to monitor for a long time.