1672 results about "Electromagnetic drive" patented technology

The present invention relates to a scanning system optimized for lidar that includes a nodding mirror, a rotary electromagnetic drive, a rotary optical encoder, and control circuitry. The rotary electromagnetic drive includes a yoke incorporating a permanent magnet, and an arm having a coil at one end of the arm. The coil is enclosed within the yoke, and an opposite end of the arm is coupled to the nodding mirror, such that movement of the coil within the yoke in response to a current causes the nodding mirror to rotate. The rotary optical encoder produces an output signal in response to rotation of the nodding mirror, which serves as feedback to the control circuitry. The control circuitry adjusts the current provided to the rotary electromagnetic drive in response to the output signal, such that the nodding mirror rotates in a reference scan pattern.

To provide an aircraft propulsion system which can secure the optimum thrust and thrust vector for flight conditions, as well as the optimum sectional area for the engine, and which is highly compatible with the environment. An electrical generator is coupled to a turbofan engine, the electrical generator is driven by output power of the turbofan engine to output electric power, and an electromagnetic driving fan is driven by the electric power. On the other hand, after bringing each of coils in the electromagnetic driving fan to a superconductive state, liquid hydrogen is introduced to a heat exchanger, collects the energy of exhaust as heat, is then vaporized, and thereafter supplied to a combustor and to a fuel cell. Further, the electromagnetic driving fan is changed in its rotational phase by a rotating mechanism portion, is made movable in a width direction of a wing and a wing chord direction by a slide mechanism portion, and can be stored inside or outside the wing by a storage mechanism portion.

An electromagnetic lens driving device includes a casing, a lens module, a positioning structure, and an electromagnetic driving module. The lens module is provided in a receiving space defined in the casing. The positioning structure, which is connected between the lens module and the casing, is configured to limit the lens module within the receiving space and generate a frictional force. The electromagnetic driving module is provided in the receiving space and corresponds in position to the lens module. When supplied with electricity, the electromagnetic driving module generates a magnetic force that drives the lens module to move along a central axis. Once the electricity is cut off, the lens module is fixed in position and prevented from moving freely by the frictional force of the positioning structure; hence, the electromagnetic lens driving features economical use of electricity.

The invention relates to a spindle motor having a fluid dynamic bearing system comprising axial and radial bearings that contains a rotor component (14) which encloses a stationary shaft (12), which in turn is connected at both its ends to axially aligned bearing parts (16; 18) that are fashioned such that they form capillary sealing gaps (32; 34), a recirculation channel (28) filled with bearing fluid that connects the remote regions of the bearing to each other, and an electromagnetic drive system (42, 44) for driving the rotor component.

A pumping system for assisting either or both ventricles of the heart. In one embodiment, separate devices are provided for each ventricle. In another embodiment, one device provides both right and left pumping. The pumping system is small, efficient, atraumatic, and fully implantable. In addition, the pumping system can provide pulsatile flow during systole. The ventricular assist device includes an actuator plate between a pair of serially connected pumping chambers that operate in a two-stroke mode, specifically a power stroke and a transfer stroke. The ventricular assist device also includes an electromagnetic drive system that provides adjustment to the pump pressure according to the current through an electromagnet. For the pumping system, springs provide a “spring force” on the actuator plate that is towards the high-pressure pump chamber. The bias force allows the springs to store and deliver energy from the electromagnetic drive system to provide better utilization of the pump components, and to reduce the pump size and consumption of electricity.

An electromagnetic driven membrane pump has a pump housing inside which at least one pump chamber (15) having at least one intake and outlet is formed and delimited between a gable (1) of the pump housing and at least one completely-sealed membrane (14) attached to a wall (4) of the pump housing and, in an axial direction of the pump housing, to a running axle (13) suspended in at least two separated suspensions in a longitudinal direction of the axle (13). At least one of the suspensions is composed of a flat spring (9) attached to the axle (13) in a radial direction out toward the wall (4) of the pump housing. The axle (13) is composed of magnetic material to be driven by a magnetic field from an electromagnet (7) for oscillation in its longitudinal direction and moving the membrane (14) in corresponding oscillating movement. The flat spring (9) is composed of an inner and at least one outer part, with the inner part attached to the axle (13) and the outer part(s) attached to the pump housing. These parts are connected with one another by two elastic legs, arranged at each side of the point where the spring is attached to the axle (13).

An electronic device (100) includes an actuation element (106) configured to alter an actuation element profile (108) of the actuation element (106) with respect to a housing (102) in response to a device event (110). Altering the actuation element profile (108) may include distally extending or changing the form factor of the actuation element (106). Device events, for example where the electronic device (100) is a radiotelephone (300), may include receipt of an incoming communication (310). When such an event occurs, the actuation element profile (108) of a call activation key (306) is altered. In response to the actuation element profile (108) being altered, a user (620) is alerted to the incoming communication (310). Shape memory alloy elements such as martensite, actuation element profile drivers such as electromagnetic driver (700), or actuation element profile motors such as a cam and follower motor (800) a may additionally be used to alter the actuation element profile (108).

The invention relates to an axial flow blood pump device comprising an integrated electromagnetic drive with a stationary stator assembly and a rotatable impeller assembly, wherein the stationary stator assembly at least comprises stator windings (3) and a bearing system (4) supporting the rotatable impeller assembly, the impeller assembly comprising at least one blade (9) and permanent magnets (10) interacting with the stator windings (3), wherein the stationary stator assembly comprises supporting elements (8) for mounting, in particular coaxially mounting the device in the interior of an anchoring system (7) being implantable into a vessel. The invention furthermore relates to a system comprising a device according to any of the preceding claims and a anchoring system (7), in particular a stent (7) surrounding the device, wherein the anchoring system (7) and the device, in particular the at least one blade (9) and the supporting members (8) of the device are in a collapsed/compressed/folded state for implanting the system into a vessel, the system being expandable/unfoldable after implantation.

An anti-shake device for use in an optical system comprises a biaxial rotating element and a electromagnetic driving module. The biaxial rotating element is made by grooving a thin resilient plate to form a special multiple-frame structure. The biaxial rotating element, when driven by the electromagnetic driving module, makes limited pivotal movement about two axes so as to provide shake compensation. The electromagnetic driving module, composed of a plurality of permanent magnets and a plurality of coils, is supported and positioned by an inner support frame and an outer support frame, both of which have uniquely designed structures. The resultant anti-shake device is structurally simple, easy to assemble, compact in size, and relatively low-cost.

A flow-metering valve for metering a flow of liquid has a valve member, a stopper and an electromagnetic driving member. The valve m ember is reciprocally displaceably arranged between a first position and a second position in the liquid chamber. The stopper is arranged at the second position in the liquid chamber. The electromagnetic driving member generates a magnetic attractive force between the valve member and the stopper to hold the valve member at the second position when the electromagnetic driving member is energized.

The invention relates to an electro-hydraulic control system for a working surface hydraulic support. The electro-hydraulic control system comprises a support controller (14), and a control terminal, an information acquisition device and an electromagnetic driver (21) which are connected with the support controller (14), wherein the control terminal is used for inputting an order and displaying received data information, the information acquisition device is used for acquiring the operating parameter data of the hydraulic support, and the electromagnetic driver (21) is used for driving an electro-hydraulic control valve group (22). The electro-hydraulic control valve group (22) connected with the electromagnetic driver (21) is used for controlling the closing and opening of a tube liquid pathway of the hydraulic support. The support controller (14) is used for transmitting the order from the control terminal and supplying the operating parameter data of the hydraulic support acquired by the information acquisition device to the control terminal. The electro-hydraulic control system is applied to the working surface hydraulic support.

The invention discloses an intelligent drug cabinet monitoring system based on Internet of Things. The intelligent drug cabinet monitoring system comprises an upper computer monitoring subsystem, a man-machine interaction subsystem and a lower computer monitoring subsystem, wherein the upper computer monitoring subsystem comprises a master control computer and an HIS center server in network connection with the master control computer, the man-machine interaction subsystem comprises a fingerprint identifier, a password reader, a touch screen and a voice module, the lower computer monitoring subsystem comprises a microcontroller, a drawer video monitoring module, a prompting module, an RFID acquisition module, a temperature and humidity acquisition module, a weighing module, an electromagnetic driving module and a drawer communication module. The intelligent drug cabinet monitoring system can detect drug change information in the cabinet in real time, drug administration is achieved through login authentication of a user, the problem of difficult standardized, scientized and refined management drug management in a hospital is effectively solved, and the drug use safety and management work efficiency are greatly improved. In addition, the invention also discloses a monitoring method for the intelligent drug cabinet monitoring system based on Internet of Things.

The invention relates to a control circuit (2) for an electromagnetic drive. Said circuit contains first and second electronic switching elements (16 to 22), which in conjunction with a timing element (12) subject the drive coil (4) to a corresponding direct current in the starting phase or in the maintenance phase. A starting current (Ua) and a maintenance current (Ub) are provided by means of a current source (14) that is controlled by the timing element (12) and a direct current converter (10) with downward control.

A device is coupled to a heat exchanger for mitigating fouling by applying a mechanical force to a fixed heat exchanger to excite a vibration in the heat exchange surface and produce shear waves in the fluid adjacent the heat exchange surface while the heat exchanger is in operation. An electromagnetic driven impulse device induces vibration onto heat exchanger tubes and/or an acoustic wave through the liquid service fluid to reduce fouling. The device can be mounted directly onto the outer part or piping and produces acoustical/vibrational modes onto the tube or near the surface of tubes.

The invention relates to a double-wing type insect-like air vehicle, belonging to the technical field of micro air vehicles. The double-wing type insect-like air vehicle comprises four wings, permanent magnets, spiral coils, a control module, an air vehicle body, four carapaces, L-shaped chests and flexible hinges, wherein the permanent magnets and the spiral coils are corresponding to the four wings, and the L-shaped chests and the flexible hinges are corresponding to the four carapaces; the four wings are respectively bonded at the B ends of the four carapaces; the spiral coils and iron cores are bonded on the surface of the L-shaped chest along the D end; the four permanent magnets are respectively bonded on the surface of the carapaces opposite to the spiral coils and the iron cores; the axial lines of the permanent magnets, the iron cores and the spiral coils are coincident; the four L-shaped chests are fixedly arranged in the air vehicle body; the flexible hinges are respectively connected with the L-shaped chests and the carapaces; and the control module is installed at the center of the air vehicle body and is respectively connected with the four spiral coils. In the invention, each wing is directly driven by the electromagnetic force of an electromagnetic driver, thus each wing has simple structure and can be controlled conveniently and flexibly; the change frequency and the acting direction of the driving force can be changed by changing the frequency, the time sequence and the amplitude value of exciting pulse; and the main structure of the air vehicle is processed by adopting the MEMS technology, thus the miniaturization of the air vehicle can be realized easily.

The invention relates to a film material micro-extending test system in the filed of film material technique, comprising a sample table, a sample structure, a drive mechanism, and a measuring observing device. A metal base in the sample table is absorbed in a vacuum absorbing table, and then fixed to a XYZ theta mobile platform via rivet; the mobile table in the sampling structure is connected with a support frame via a support spring; one end of the film sample is connected with the mobile platform, and another end is fixed to the support frame; a marker post is located at one end of the mobile platform close to the film sample; one end of the stretching bar in the drive mechanism, and another end is fixed to the XYZ mobile platform; an electromagnetic drive motor is connected with the XYZ mobile platform. The element preparation technique of the invention is easy, and convenient to operate. The invention has low cost and good linearity. The invention overcomes experimental error caused by plastic deformation of the support beam in the stretching process.