929 results about "Electrical drive" patented technology

The invention discloses a variable frequency driving device energy recovery control system based on direct power supply of a high-voltage power grid, and relates to the technical field of electrical transmission and energy recovery control. Updating the power grid impedance model in real time by using a complex impedance calculation method; load operation state parameters are dynamically adjusted in combination with motor end output power, rotating speed change and torque calculation; according to the method, regenerative energy is accurately calculated, a feedback path is adjusted according to voltage fluctuation and frequency deviation of a power grid, a feedback current fluctuation ratio and a power factor are monitored, a feedback path conduction proportion is optimized in real time, when the current is unstable or the power factor is abnormal, a suboptimal path is automatically switched, and continuous and stable operation of a system is guaranteed; according to the invention, the energy feedback efficiency and the power grid compatibility of the high-voltage power grid variable-frequency driving device are effectively improved, and the method is suitable for energy feedback application of a high-power motor driving system.

A meter socket adapter (MSA) for connecting a battery energy storage system (BESS) to a household microgrid through a meter combo load center. The MSA includes: a housing matching an electricity meter and a meter socket in the meter combo load center; a plurality of power conductors that connect among the electricity meter, the meter socket, and BESS; a meter interconnection device (MID) switch for connecting a utility grid or one or more distribution energy resource (DER) devices to supply power to household loads in the household microgrid; a MID driving circuit for driving the MID switch to close or open; and a thermal management circuit couple with a plurality of temperature sensors disposed at each high current connection point to prevent overheat.

A multiphase inverter for an electric drive system comprises multiple X-type multi-stage power converters positioned between a high-voltage DC power supply and an electric machine. Each of the multiple X-type multi-stage power converters is an integrated solid-state circuit (IC) comprising a positive DC power bus, a negative DC power bus, a neutral bus, and multiple semiconductor switches arranged in a stacked configuration. The multiple semiconductor switches are interconnected via the positive DC power bus, the negative DC power bus, and the neutral bus.

A multiphase inverter for an electric drive system comprises a multitude of H-type multilevel power converters arranged between a high-voltage direct current (HVDC) supply and an electric machine. Each of the multitude of H-type multilevel power converters is an integrated solid-state circuit (IC) comprising a positive DC power bus, a negative DC power bus, a neutral bus, and a multitude of semiconductor switches arranged in a stacked configuration. The multitude of semiconductor switches are interconnected via the positive DC power bus, the negative DC power bus, and the neutral bus.

An array of spin qubits relies on a gradient magnetic field to ensure that the qubits are separated in frequency in order to be individually addressable. Furthermore, a strong magnetic field gradient is required to electrically drive the EDSR of the qubits. Quantum dot devices and related methods and systems that integrate magnetic materials in the gates to provide a gradient magnetic field are disclosed. Magnetic materials in different gates may be of different heights to improve frequency separation of neighboring qubits. Unlike previous approaches to quantum dot formation and manipulation, various embodiments of the quantum dot devices disclosed herein may enable improved control over magnetic fields and their gradients to realize better frequency targeting of individual qubits, help minimize adverse effects of charge noise on qubit decoherence and provide good scalability in the number of quantum dots included in the device.

The utility model belongs to the technical field of stroke detection of driving elements, and particularly relates to a stroke detection device of a thread piezoelectric actuator, which comprises a sliding seat integrated in the thread piezoelectric actuator, and the sliding seat is configured to rotate relative to a screw rod and can synchronously move along with the screw rod along the axial direction of the screw rod; a limiting assembly is arranged between the sliding base and the base and can prevent the sliding base from rotating relative to the base. The reading head and the encoder are oppositely arranged. According to the utility model, through arranging the sliding seat which is rotatably connected with the screw rod and slidably connected with the base and prevents rotation through the limiting assembly, the composite motion of the screw rod is decomposed into pure axial translation of the sliding seat relative to the base, and the reading head and the encoder are respectively arranged on the sliding seat and the base or the screw rod and the sliding seat, so that the closed-loop control of the thread piezoelectric actuator is realized; and the driving precision and the long-term reliability under various loads and working conditions are obviously improved.

The invention provides an assembly for movably holding a component and a method for positioning a component relative to an electrode for an electrically driven plating process. The assembly includes a tool assembly and a device. The tool assembly includes a tool base and a carrier. The tool base includes a frame and a guide. The frame is configured to hold the component. A guide is associated with the multi-axis path. The carrier is movably coupled to the guide. The device is coupled to the carrier and is movable with the carrier along a multi-axis path.

A power supply circuit having a current control mechanism is provided. The power supply circuit includes a charging driver, a plurality of input current processing circuits, a charging circuit and a control circuit. The charging driver includes a plurality of switch components and a driver circuit. The control circuit controls the plurality of input current processing circuits respectively to switch the plurality of switch components. At least one of a plurality of input currents that are supplied by a plurality of external input power sources flows to the driver circuit through at least one of the plurality of switch components. The driver circuit transmits the at least one of the plurality of input currents to the charging circuit, and drives the charging circuit to use the at least one of the plurality of input currents to charge an electronic device.

The invention provides a green-electricity-driven oil field drilling and production equipment control method, system and equipment and a storage medium, and the method comprises the steps: carrying out the rolling prediction of the load power of a drilling machine in a future time window based on the mapping correlation characteristics between a load power demand and a stratum structure and the working condition information in an oil field drilling and production process; the transient peak value of the load power of the super capacitor of the drilling machine in the next operation period is obtained; when the transient peak value is greater than a preset compensation threshold value, performing constraint scheduling on the transient load power of the super capacitor by using a power optimization model to obtain a confidence compensation amount of the transient load power in the super capacitor; and when the drilling machine is in an oil field drilling and production transient working condition, an emergency regulation factor of the drilling machine in the transient working condition is determined through the confidence compensation amount and the rated power of the drilling machine, and then power distribution of the super capacitor and diesel power generation in the next control period of the drilling machine is subjected to confidence regulation based on the emergency regulation factor. Based on the scheme, balanced green power distribution under the transient working condition of the drilling machine can be realized.

A short-circuit protection circuit in a battery protection system having a battery, a charge switch and a discharge switch connected in series. The short-circuit protection circuit includes: a drive unit having a first output terminal coupled to a control terminal of the discharge switch and a second output terminal coupled to a control terminal of the charge switch, and configured to output a discharge drive signal through the first output terminal to turn on or off the discharge switch, and output a charge drive signal through the second output terminal to turn on or off the charge switch; and a short-circuit detector configured to perform a short-circuit protection when the short-circuit occurs. One of the charge drive signal, the discharge drive signal and a power supply having a higher voltage is configured to supply power to the short-circuit detector.

The invention relates to the technical field of electrical measurement and wireless communication, in particular to an insulating rod current and voltage measurement system based on wireless transmission, and aims to solve the problems of low efficiency, limited range and high safety risk of existing single-phase grounding fault troubleshooting. The system comprises a portable measurement and acquisition subsystem and a handheld terminal analysis subsystem; the measurement and acquisition subsystem integrates high-precision synchronous sensing, electromechanical driving and wireless communication and can synchronously acquire current and voltage in a non-intrusive manner; and a multi-feature fusion and space-time association algorithm is embedded in the terminal analysis subsystem and is used for fault diagnosis and accurate positioning. The system can accurately measure and analyze the current and the voltage of the distribution line under the non-power-off and non-intrusive conditions, can quickly and accurately position the single-phase earth fault, remarkably shortens the troubleshooting time, and reduces the economic loss and the safety risk.

The utility model provides a self-service tableware distribution device which comprises a housing and at least one set of stock bin mechanism arranged in the housing, the stock bin mechanism comprises a tableware containing bin and a tableware blanking bin, the tableware containing bin is used for stacking and storing tableware, and the tableware blanking bin is sequentially provided with an upper mold, a middle mold and a lower mold. The three parts are respectively provided with channels for controlling the sequential falling of tableware; in the initial state, the middle mold is aligned with the upper mold and staggered with the lower mold, and when a user presses a switch or pulls tableware, channels between the molds are in linkage alignment, and a single piece of tableware is released to a taking position; the tableware head triggers the linkage assembly in the taking process, the middle mold is driven to reset, and preparation of the next piece of tableware is achieved. The device provided by the utility model is reasonable in structure, does not need to be electrically driven, completes tableware distribution by means of mechanical linkage, has the advantages of automatic control, single-support taking, sequential supply, pollution prevention and the like, and is suitable for cafeteria, shared kitchens, enterprise canteens and other scenes.

Aircraft capable of hovering comprising a fuselage at least one rotor that is rotatable with respect to the fuselage, electrical drive means adapted to rotate the rotor and electrically powered by a battery, and a cooling system of the battery. Said cooling system comprises, in turn, a first opening for the air to enter, second openings for the air to escape and a passage which places the first opening in fluidic communication with the second openings and within which the battery is placed. The cooling system further comprises a fan adapted to increase the kinetic energy of the air contained in the passage and which is operated when the forward speed of the aircraft with respect to the ground is lower than a speed threshold value and / or when the temperature of the battery exceeds a temperature threshold value.

A motor vehicle (10) with at least a partially electric drive (12) and a thermal management system (14) is described, which is configured to condition interior air (IL) of the motor vehicle (10) and / or to condition at least one electrical vehicle component (16) associated with the electric drive (12), in particular a battery storage unit, wherein the thermal management system (14) can be coupled to at least one separate transport container (20) such that conditioned air can be introduced into a container interior (28) by a respective air supply section (30) and extracted from the container interior (28) by a respective air discharge section (32), and wherein the thermal management system (14) is configured to cool or heat the air (KL) to be introduced into the container interior (28).It is provided that the air supply section (30) and the air discharge section (32) each have an air-permeable cover (70) facing the interior of the container (28), which is designed to provide a space (ZR) between at least one inner wall (22i) of the transport container (20) and the transported goods (72) contained therein, in which the conditioned air (KL) can spread freely, in particular being introduced into and / or extracted from the transport container (20). Furthermore, a transport container (20) for such a motor vehicle (10) is described.

The invention discloses a piezoelectric ceramic-based single droplet generation device, which comprises a microcavity liquid chamber, a piezoelectric driving assembly, a micropore nozzle, a hydraulic adjusting system and an electric control driving module, the bottom of the microcavity liquid chamber is provided with a nozzle interface, and the volume of the internal cavity is adaptive to trace liquid storage and pressure transmission; the piezoelectric driving assembly comprises a piezoelectric ceramic element which is connected with the micro-cavity liquid chamber in a bonding manner and is used for generating deformation under the driving of an electric signal so as to apply pulse pressure to liquid in the liquid cavity; the micropore nozzle is detachably connected to the bottom of the liquid chamber, the diameter of a spraying hole is adjustable, and the micropore nozzle is used for controlling the initial size of liquid drops; the electric control driving module comprises a power supply, a driving circuit and a controller, is used for outputting an adjustable electric signal to cooperatively control the voltage amplitude, the pulse width and the trigger frequency of the piezoelectric driving assembly, and is linked with the hydraulic adjusting system to realize multi-parameter regulation and control of the droplet size; according to the invention, through cooperation of the piezoelectric driving assembly and the electric control module, high-precision liquid drop control is realized.

The invention discloses a variable-rigidity flexible space debris capturing device based on a woven structure. The variable-rigidity flexible space debris capturing device comprises a capturing assembly, a connecting assembly, a driving device, a power supply module and a control assembly. The capturing assembly comprises a plurality of flexible woven belts; the connecting assembly comprises an upper fixator and a lower fixator, and the two ends of the flexible woven belt are fixedly connected with the upper fixator and the lower fixator respectively; a shape memory alloy wire is fixedly arranged on the flexible woven belt, and the power supply module is at least used for electrifying the shape memory alloy wire; the driving device is used for driving the upper fixer to rotate so as to drive the plurality of flexible woven belts to be folded or unfolded; when the plurality of flexible woven belts are folded and / or unfolded, the plurality of flexible woven belts realize mutual support through position difference; according to the variable-rigidity flexible space debris capturing device based on the woven structure, the woven structure formed by interweaving the flexible strips is utilized, the flexibility and adaptability of the woven structure are brought into play, and self-adaptive conformal capturing of space debris of different shapes is achieved.

The invention relates to an electric drive system (1) with at least two drive trains that are at least partially separate from each other, a first electric machine (2) and a second electric machine (3), wherein the drive trains can be individually coupled to the first or second electric machine (2, 3), wherein at least one loose gear (18 to 21) is arranged for coupling, wherein several switching elements (S1, S1'; S2, S2') are arranged for coupling at least one of the loose gears (18 to 21) to a respective input shaft (4, 5) in order to selectively transmit its drive force to a respective output shaft (13), wherein the switching elements (S1, S1'; S2, S2') are configured to decouple the respective loose gear (18 to 21) from the input shaft (4, 5) when the electric drive system (1) is operated in a partial load operation with a power requirement below a certain threshold.

The invention relates to a compliant constant force mechanism, a clamping mechanism and a clamping method of the clamping mechanism. The compliant constant force mechanism comprises a base, a double-beam connection type constant force mechanism, a bridge type displacement amplifier and a piezoelectric actuator. The bridge type displacement amplifier is connected to the base, the piezoelectric actuator is arranged in the bridge type displacement amplifier, and the bridge type displacement amplifier is provided with an output port; the double-beam connection type constant force mechanism is connected to the base and an output port of the bridge type displacement amplifier, and a mechanism output end face is arranged at the tail end of the double-beam connection type constant force mechanism. Wherein the output of the piezoelectric actuator generates first-stage amplified displacement at an output port through the bridge type displacement amplifier; and the displacement at the output port is subjected to second-stage amplification at the output end face of the mechanism through the double-beam connection type constant force mechanism. The driving structure is arranged in the flexible clamping mechanism, periodic offset of parts is achieved, self-adaptive alignment assembly of misaligned parts can be achieved by means of the active and controllable periodic movement, and higher engineering application value is achieved.

The invention provides a bidirectional bootstrap power supply circuit and method and a power switch device driven by self power supply. The circuit comprises a bidirectional power taking module, a first energy storage module and a second energy storage module. The bidirectional power taking module is connected between the first power supply end and the second power supply end; the first energy storage module and the second energy storage module respectively comprise a switching tube and an energy storage capacitor, the switching tube is connected between the bidirectional power taking module and the first end of the energy storage capacitor, the first end of the energy storage capacitor is connected with a power supply output end, the second end is connected with a power supply end, and the power supply output end supplies power to driving signals of the bidirectional switching power device; when a potential difference exists between the two power supply ends, the circuit takes power from the high-voltage end through the bidirectional power taking module, charges the corresponding energy storage capacitor by using the switch tube or the body diode thereof, and establishes a driving power supply voltage; when the power device is conducted and the potentials at the two ends are close, the electric energy is bidirectionally transferred between the two energy storage capacitors. An external isolation power supply can be omitted, the power supply architecture of the bidirectional power device is simplified, and the cost is reduced.

Photovoltaic electric control shutter hollow glass externally connected with a control box comprises a window body, a shutter blind, an electric driving device, a photovoltaic assembly and a receiver, the shutter blind is arranged in the window body, the electric driving device is arranged in an upper frame of the window body and used for driving the shutter blind to complete lifting and overturning, and the electric driving device is electrically connected with the wireless receiver; the receiver comprises a bottom box, a box cover and a main control circuit board, the main control circuit board is provided with a microprocessor, a power management unit, a photovoltaic charging management unit, a motor driving unit, a wireless signal receiving and processing unit, a key unit and an indicator light unit, and the photovoltaic charging management unit is electrically connected with the photovoltaic module; the wireless receiving device is installed in the upper frame of the hollow glass, the control key box which is externally connected and installed in a lower mode is adopted, the appearance of the hollow shutter glass can be neat, the key control box can be disassembled and assembled according to needs to be debugged and operated, the set height of the control key box better conforms to the using habit of a user, and operation is more convenient.

The present disclosure relates to chiral materials and films comprising metal- coordinated organic complexes. Specifically, the invention provides compositions, derivative structures, and methods for the preparation of such materials in solution, as coatings, and in other forms. These films exhibit chiral properties allowing for tunable chiral-electrochromic capabilities for optoelectronic devices, and display technologies.

An electrically driven construction machine that can suppress damage to a feeding cable is provided. An electrically driven excavator includes a swing angle sensor that senses the swing angle of a swing structure, a cable stand that is disposed on the swing structure and has a holding unit that holds a feeding cable, a rotational angle sensor that senses the rotational angle of the holding unit of the cable stand, a swing lock valve, and a controller. The controller computes the position of the holding unit of the cable stand on the basis of sensing results of the swing angle sensor and the rotational angle sensor when a connection sensor senses a state in which the feeding cable is connected to a feeding port. Further, the controller controls the swing lock valve to an interrupting state to inhibit a swing of the swing structure when the computed position of the holding unit goes outside a predetermined range.

The invention discloses a piezoelectric driving micro-nano scratching instrument, and belongs to the technical field of material mechanical property detection. The scratch tester comprises a piezoelectric driving system, a multi-mode detection system and a control and data processing system. The core is that the piezoelectric driving system is completely driven by piezoelectric elements, and a displacement table adopts a clamping type stepping mechanism based on a flexible hinge, so that the combination of nanoscale motion precision and large stroke is realized; the multi-mode detection system innovatively integrates an electrical impedance detection loop composed of a conductive pressure head and a sample, can sensitively capture microscopic damage and failure behaviors of a material in the scratching process, and carries out synchronous fusion analysis with signals of a force sensor and a displacement sensor. According to the invention, the defects of insufficient precision and single detection means of the traditional scratch tester are overcome, and the accuracy and reliability of detecting the interface bonding strength and other mechanical properties of materials such as films and coatings are remarkably improved.

According to the invention, the articulated robot arm (20) has several robot segments (22) connected to each other by a joint, which are driven by electric drive units (62), each of which has an electric motor (68). At least one drive unit (62) has a redundant braking device (60) with two brakes (64A, B), each designed to exert a braking force without current. To increase reliability, the two brakes (64A, B) are based on different operating principles, so that the respective braking force of the two brakes (64A, B) is exerted by different operating principles.

A drive arrangement of a conditioning apparatus of a forage harvester having two conditioning rollers, with at least one of the conditioning rollers able to be driven at variable speed via an electrical drive train, includes an electric motor / generator for driving the conditioning roller. The electric motor / generator is able to be operated as a generator for braking the conditioning roller and to return the generated electrical energy into a drive system of the forage harvester.

The invention relates to a double-container heat storage type water heater circuit and a control method, and the circuit comprises the double-container heat storage type water heater circuit. The circuit comprises a power supply input module, a switch control module, a double-container switching module and a control module, wherein the switch control module comprises a first relay driving unit and a conduction buffer unit which form a parallel network, and a first end of the parallel network is connected with a power supply output end of the power supply input module; the second end of the parallel network is connected with the common end of the double-container switching module, the controlled end of the first relay driving unit is connected with the first signal output end of the control module, and the controlled end of the conduction buffer unit is connected with the second signal output end of the control module; when the first relay driving unit starts to switch the conducting state, the conducting buffer unit is controlled to conduct firstly, and then the first relay driving unit is controlled to switch the conducting state, so that the current transfer is smooth and no arc interference exists in the relay switching process, the switching reliability is improved, and the service life of the relay is prolonged.

According to the inductance adjusting system of the ultrasonic generator frequency self-adaption system, a main execution component is an inductor, and the inductor comprises a magnetic core coil. The magnetic core coil is provided with a group of coil leading-out eight taps and two magnetic cores which are at least partially inserted into the magnetic core coil in advance, the two magnetic cores are symmetrically arranged, a first substrate and an adjusting plate are respectively fixed on the two magnetic cores, a second substrate is arranged beside the adjusting plate, and the first substrate and the second substrate are fixed on the adjusting plate. An electric adjuster for driving the magnetic core on the adjusting plate to move is mounted on the second substrate, and a driving part of the electric adjuster is connected with the adjusting plate. On one hand, a rotating motor is electrified to drive a rotating screw rod to rotate, so that the rotating screw rod is matched with a threaded hole to enable a magnetic core on an adjusting plate to perform lifting displacement, and then a gap between a pair of magnetic cores is adjusted, or a motor of an electric linear push rod or a linear motor is electrified to drive the magnetic core on the adjusting plate to perform lifting displacement; therefore, the gap between the pair of magnetic cores is adjusted, and the inductance value of the inductor is adjusted. On the other hand, the single-chip microcomputer minimum system module switches eight groups of taps of the magnetic core coil through the coil tap gating module, and inductance value adjustment of the inductor is achieved by changing the number of turns of the inductance coil.

The invention relates to a method for determining an optimal rotational speed of a pressure medium supply device (10) of an electro-hydraulic system, which has an electric drive (4) and a hydraulic pump (2) coupled to it, which delivers pressure medium, wherein the electric drive (4) drives the hydraulic pump (2) according to a rotational speed and wherein the hydraulic pump has an adjustable displacement, wherein a minimum rotational speed value is determined based on a target volume flow rate (54) of the pressure medium requested by the pressure medium supply device (10) (110); wherein several comparative rotational speed values ​​are determined (120) such that a smallest of the several comparative rotational speed values ​​is equal to or greater than the minimum rotational speed value and a largest of the several comparative rotational speed values ​​is equal to or less than a predetermined maximum rotational speed value;wherein for at least some of the several comparative speed values ​​a comparative value corresponding to the respective comparative speed value is calculated using a cost function (190) which includes a sum (180) of at least one speed-dependent power loss term of the electric drive (4) and a speed-dependent power loss term of the hydraulic pump (2); and wherein the comparative speed value which has the smallest comparative value is determined as the optimal speed value (210).;

The invention provides a large-load two-way driver. The large-load two-way driver comprises a shell, two SMA wire-spring structures, a taper pin, a retraction spring, a locking sliding block, a steel ball and a double-slope wedge block. A first set of SMA-spring structure for driving the locking sliding block is arranged in a rectangular cavity of the shell, and a taper pin and a second set of SMA-spring structure for driving the double-bevel wedge block are arranged in an L-shaped cavity; when the taper pin needs to stretch out, the first set of SMA-spring structure is powered on to drive the locking sliding block to move rightwards and release limiting on the steel ball, the compression spring of the second set of SMA-spring structure pushes the double-inclined-face wedge block to move leftwards, and then the taper pin is driven to be ejected out and kept in the stretching-out state through friction self-locking of the inclined faces. When the taper pin needs to retract, the second SMA-spring structure is powered on, the double-bevel wedge block is driven to move rightwards, the retraction spring pulls back the taper pin, meanwhile, the steel ball limits the double-bevel wedge block again, and the taper pin is stabilized in the retraction state. The invention has the advantages of simple and compact structure, light weight, strong bearing capacity and high driving reliability.