42results about How to "Low control power" patented technology

A switch module includes a collector connection, an emitter connection, and a gate connection. The switch module includes a plurality of parallel connected switching elements, e.g., insulated-gate bipolar transistors, each having a collector electrode electrically connected to the collector connection, an emitter electrode electrically connected to the emitter connection, and a gate electrode electrically connected to the gate connection. A fault protection device is operatively electrically connected between the gate connection and the switching elements and comprises passive electrical components which are selected such that in the event of a fault in at least one of the plurality of switching elements, a gate-emitter voltage is provided to the gate electrodes of non-faulty switching elements in a passive manner.

The invention is an electromagnetic speed regulating electric-dragged miner, including a machine body, two dragging boxes situated at two ends of the machine body, respectively, driving wheel and a cutting mechanism, where each dragging box contains an electromagnetic speed regulating motor which includes a three-phase asynchronous cage motor, an electromagnetic slip clutch and a speed-regulating control system. The clutch includes an armature, a magnetic pole, exciting winding, magnetic conductor and a speed measurer, the armature is installed on the output shaft of the three-phase asynchronous cage motor and rotates with the output shaft at the same speed, the magnetic pole is installed the output shaft of the electromagnetic speed regulating motor, the exciting winding and magnetic conductor are fixed inside the magnetic pole, and the speed measurer is installed on the output shaft of the electromagnetic speed regulating motor to measure the output speed and feeds it back to the speed regulating control system; the speed regulating control system is a speed and current double closed-loop speed regulating control system, and regulates the corresponding the exciting current magnitude according to the feedback information from the sensor and speed measurer, thus achieving the purpose of changing output speed.

The invention belongs to the field of fluid drive and control, in particular relates to a damping type pilot control switch valve. The damping type pilot control switch valve comprises a valve body and a main valve element. The two ends of the valve body are respectively provided with a driving device. An adjusting cavity is formed between the driving device and the main valve element. Two open grooves are arranged in the two ends of the main valve element. Pilot valve elements are arranged in the two open grooves. The adjusting cavity is communicated with a low-pressure oil outlet or a high-pressure oil inlet through fixed damping. The pilot valve elements is driven to enable the adjusting cavity to be communicated with or not communicated with the high-pressure oil inlet or the low-pressure oil outlet, so that a hydraulic acting force is formed, thereby moving the main valve element. The damping type pilot control switch valve has the advantages 1 that the main valve element is driven by hydraulic acting force instead of direct electromagnetic driving, so as to greatly increase the driving force; 2 that the pilot valve element is designed inside the main valve element, so as to greatly reduce the volume; 3 that the pilot valve element is designed for controlling the pressure of the control cavity at the two ends of the main valve, and the flow required by the pilot control isvery small, so that the driving force of driving the pilot valve element can be very small, the size of the electromagnetic driving device is further reduced, and the purposes of energy conservationand emission reduction are achieved.

The invention discloses a linear motor permanent magnetic brake. The linear motor permanent magnetic brake comprises a static iron core assembly and a moving plate assembly, wherein the static iron core assembly comprises multiple coils embedded in the static iron core; the upper portion of each coil is provided with a magnet yoke and magnet steel; the moving plate assembly comprises a fixed plate and a movable plate which are spaced by a spring sheet; and the fixed plate is placed above the magnet yokes and the magnetic steel. The linear motor permanent magnetic brake has the following advantages: 1, linear internal contracting brake is realized, the volume is small, and the weight is light; 2, the processing is simple, and the installation and maintenance are simple; 3, the connection is reliable, the brake is flexible, automatic control and long-distance operation of a work mechanism can be realized, and the brake time is extremely short; 4, the control power is small, and the service life is long; 5, the performance is stable, and the safety and reliability are high; 6, the structure is simple and compact, the operation is simple, and accurate combination can be guaranteed in quite short time; 7, diversified combination and application can be realized through adjusting features of the coils and the magnetic steel; and 8, the linear electromagnetic brake does not need motion at all, apart from an electromagnet, a brake using a permanent magnet does not need electric power, and thus the space and the efficiency can be reduced.

Provided is a system and a method for providing a control power for controlling a network frequency of a power network, which is operated at a nominal network frequency, in the event of a frequency deviation of the network frequency from the nominal network frequency. A time curve of the frequency deviation is spectrally split into at least two different spectral ranges, where each of the spectral ranges is assigned to one of at least two different technical units for providing control power. The required control power is then provided individually or jointly by the technical units in accordance with the spectral split of the time curve of the frequency deviation, where a respective power share, of each technical unit, in the control power corresponds to the spectral share, in the time curve of the frequency deviation, of the spectral range assigned to the corresponding technical unit.

The invention discloses a control circuit for constant temperature and a constant temperature device, which comprises a control circuit board, and further comprises a primary refrigeration motor, a secondary refrigeration motor, a heating device, and a humidifying device all connected with a triphase power supply through solid-state relays, wherein a primary refrigeration motor output control interface, a secondary refrigeration motor output control interface, a heating device output control interface, and a humidifying device output control interface are arranged on the control circuit board; and the solid-state relays of the primary refrigeration motor, the secondary refrigeration motor, the heating device, and the humidifying device are connected with corresponding output interfaces on the control circuit respectively. According to the control circuit, as the solid-state relays have no machine parts, the contact function is finished by a solid device; as the solid-state relays have no moving parts, the solid-state relays can work in the environment with high impact and vibration; and as intrinsic properties of components of the solid-state relays, high service life and reliability of the solid-state relays are determined.

The invention discloses a single-chip microcomputer brushless direct-current motor rotor position detecting protector. The protector includes an ATMEGA64 single-chip microcomputer, a 5V direct-current power source, an RS485 communication interface circuit, a data storage unit, a power driving module and a plurality of sensor assemblies; the input ends of the ATMEGA64 single-chip microcomputer are connected with a temperature sensor, a current sampling circuit and a key reset circuit; the output ends of the ATMEGA64 single-chip microcomputer are connected with a liquid crystal display circuit; each sensor assembly includes a first Hall sensor module, a first optocoupler isolation circuit, a second Hall sensor module, a second optocoupler isolation circuit, a third sensor Hall module and a third optocoupler isolation circuit which are uniformly distributed around a rotor; and the power driving module includes a fourth optocoupler isolation circuit, a power driving circuit and an over current protection circuit. The single-chip microcomputer brushless direct-current motor rotor position detecting protector of the invention has rotor position, temperature detection and current information detection functions. The single-chip microcomputer brushless direct-current motor rotor position detecting protector has the advantages of complete functions and high practicability.

The invention relates to the technical field of heating and discloses a floor heating device based on graphene heat conduction and radiation of far with infrared ray. A heating device is included, andcomprises a corrugated sheet which is provided a heater; one end of a first heating body of the heater is connected with the first guide output end of a first cold wire, and the other end of the first heating body is connected with the second guide input end of a second cold wire; the top face of the corrugated board is provided with a graphene board which is provided with a heat conduction device; a heat conduction block of the heat conduction device is provided with a communicating hole; a temperature sensor is arranged in the communicating hole, and is connected with a temperature controller; the temperature controller is connected with a power source switch and a solid state relay; and an emitting electrode and a collecting electrode of a switch triode of the solid state relay are connected with the first guide input end of the first cold wire and the second guide output end of the second cold wire correspondingly. The floor heating device based on graphene heat conduction and radiation of far infrared ray solves the technical problems that an existing floor heating device is low in heating efficiency and poor in heating effect and has potential safety hazards.

The invention belongs to the field of fluid transmission and control, and particularly relates to a full-bridge pilot control switch valve. The full-bridge pilot control switch valve comprises a valvebody and a main valve element, two driving devices are arranged at the two ends of the valve body correspondingly, adjusting cavities are formed between the driving devices and the main valve element, the adjusting cavities are provided with pilot valve elements, the valve body is provided with first through bridges used for enabling the adjusting cavities to communicate with low-pressure oil outlets, and second through bridges used for enabling the adjusting cavities to communicate with high-pressure oil inlets, the pilot valve elements are driven to enable the adjusting cavities to communicate with the high-pressure oil inlets or the low-pressure oil outlets, hydraulic acting force is formed, and thus the main valve element is moved. The full-bridge pilot control switch valve has the following advantages that 1, the main valve element is driven by the hydraulic pressure, and driving force is greatly increased; 2, the pilot valve elements are designed in the valve body, and the sizeis greatly decreased; and 3, the pilot valve elements are designed for controlling the pressure of control cavities in the two ends of a main valve, the flow required for pilot control is quite small,therefore, the driving force for driving the pilot valve elements is quite small, the size of the electromagnetic driving devices is decreased, and energy saving and emission reduction are achieved.

The invention discloses a vacuum switch with a vacuum arc-extinguishing chamber. The vacuum switch comprises insulating housings which are internally provided with an intermediate shielding cover. Furthermore the intermediate shielding cover is internally provided with a corrugated pipe protecting cover. The corrugated pipe protecting cover is internally provided with a corrugated pipe. Furthermore the corrugated pipe is internally provided with a dynamic conductive rod. One end of the dynamic conductive rod is provided with a moving contact, and furthermore one side of the moving contact is provided with a static contact. One end of the static contact is connected with a static conductive rod. A static grading shield is arranged outside the static contact. The insulating housings are connected with each other through an intermediate sealing ring. According to the vacuum switch with the vacuum arc-extinguishing chamber, arc is extinguished in a sealed container, thereby realizing no leakage of arc and hot gases; small clearance between 1mm and 40mm is realized between the static contact and the moving contact; and furthermore the vacuum switch with the vacuum arc-extinguishing chamber has advantages of short arc combustion time, low arc voltage, low arc energy, low contact wearing, large number of allowed on-and-off times, small inertia of the dynamic conductive rod, high suitability for high-frequency operation, small size of the operating mechanism, small size of the vacuum switch, small weight and low control power.

The invention belongs to the field of fluid transmission and control, and particularly relates to a damping half-bridge type pilot control switch valve. The damping half-bridge type pilot control switch valve comprises a valve body and a main valve core, driving devices are arranged at the two ends of the valve body correspondingly, an adjusting cavity is formed between the driving devices and themain valve core and provided with a pilot valve core, the valve body is provided with a first through bridge used for communicating with the adjusting cavity and a low-pressure oil outlet, and a second through bridge used for communicating with the adjusting cavity and a high-pressure oil inlet, fixed damping is arranged in the first through bridge or the second through bridge, the pilot valve core is driven to enable the adjusting cavity to be connected with or disconnected from the high-pressure oil inlet or the low-pressure oil outlet, hydraulic acting force is formed, and thus the main valve core is moved. According to the damping half-bridge type pilot control switch valve, driving force can be greatly increased, the size of an electromagnetic driving device is decreased, input energy required for drive is reduced, and energy saving and emission reduction are achieved.

The invention discloses a semiconductor circuit, a packaging structure using the same and a preparation method of the packaging structure. The semiconductor circuit comprises a driving HVIC chip, a high-side driving module and a low-side driving module, the driving HVIC chip is electrically connected with the high-side driving module, the high-side driving module comprises three upper bridge power elements, and each upper bridge power element is of an RC-IGBT structure; the driving HVIC chip is electrically connected with the low-side driving module, the low-side driving module comprises three lower bridge power elements, and each lower bridge power element comprises an IGBT (Insulated Gate Bipolar Translator) tube and a fly-wheel diode; the input end of the upper bridge power element is electrically connected with the driving HVIC chip; according to the semiconductor circuit, the packaging structure using the semiconductor circuit and the preparation method of the packaging structure, an upper bridge uses an RC-IGBT structure, a lower bridge uses a structure of an IGBT tube and a fly-wheel diode, the module cost is reduced, and the reliability of the module is improved. And meanwhile, the module has the advantages of high input impedance, low control power, simple driving circuit, high switching speed, low conduction voltage drop, large on-state current, low loss, better reverse recovery capability and the like.

The invention relates to a warming apparatus for infusion or flushing and an application method thereof. A liquid container is inserted into an inner cavity of a warming apparatus, the warming apparatus is started, a microcontroller on a main control panel determines a temperature by virtue of a temperature sensor RT1 in a temperature measuring circuit, the microcontroller controls a heating circuit, when the temperature is smaller than a target temperature, the microcontroller transmits a signal to the heating circuit, a heating sheet begins to work, the microcontroller calculates the heatingpower, an upper heating sheet P10 and a lower heating sheet P11 are connected, the upper heating sheet P10 and the lower heating sheet P11 heat a heat conduction plate, and the heat conduction plateheats the liquid container; and when the temperature is approximate to the target temperature, the heating power is lower, after the temperature reaches the target temperature, the liquid container iskept at the target temperature until the infusion or flushing process is ended, the power of the warming apparatus is switched off, and the liquid container is taken out.

The invention is composed of a turnover wheel continuously variable transmission, a worm and gear speed control and state automatic control system, and the specific mechanical properties of the worm and gear in the epicyclic gear train and the reverse transmission state are fully utilized, the transmission and the speed change are all completed by gears, and the transmission capacity is greatly improved. The control power is small, the efficiency is improved, the energy consumption is reduced, the novel technology is simple in structure, and has the typical characteristics of universality andpracticability, and is suitable for ordinary vehicles and machines, and is a novel continuously variable transmission suitable for heavy equipment such as large-scale heavy-duty vehicles and large-scale machinery.