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32results about How to "Normal conduction" patented technology

Circuit for dimming or speed regulation control and control method

The invention relates to the field of dimming and speed regulation related to illumination, motors and electronics, in particular to a motor-driven circuit for dimming or speed regulation control which is suitable for illumination of a silicon-controlled dimmer or adjustment of a silicon-controlled speed regulator and a control method. A detection compensation circuit for maintaining the normal work of the silicon-controlled dimmer consists of a voltage detection circuit, a current detection circuit, a follow current compensation circuit and a power factor compensation circuit; the on-off running state of the silicon-controlled dimmer or speed regulator is detected by a detection method combining output voltage change and current change of the silicon-controlled dimmer or speed regulator;the on-off and trigger running conditions of the silicon-controlled dimmer are provided by adopting a compensation method combining power factor compensation and follow current compensation; a control circuit of a load consists of a datum transformation circuit, an output duty cycle control circuit, an output current control circuit and a drive output circuit and produces a control signal by detecting mains supply AC phase-shedding operation output of the silicon-controlled dimmer or speed regulator; and the output power of the load is controlled by a load output duty cycle and load working current compound control method so as to realize large output power adjustable range of the load and high linearity of the adjusting process.
Owner:HANGZHOU SOMA ELECTRONICS

Device for breakdown diode to initiatively trigger bypass of thyristor valve string

The invention provides a device for a breakdown diode to initiatively trigger a bypass of a thyristor valve string. The device comprises a plurality of thyristor valves connected in series and accessories thereof. A breakdown diode (BOD) is connected in a position between the gate pole and the positive pole of each thyristor valve. When faults such as short circuit happen in the electrical system and a valve-based electronics (VBE) does not receive trigger signal of the thyristor valve string sent by a control and protection unit, the voltage at two ends of the thyristor valve string increases dramatically; when the forward voltage reaches the setting valve of breakdown voltage of the whole string of the breakdown diode (BOD), the breakdown diode (BOD) is converted to an on-state and sends trigger signal to the door poles of the thyristor valves depending on a sudden short circuit effect, the thyristor valves are in an on-state, and the valve-based electronics (VBE) automatically supplies trigger signals of the whole thyristor valve string according to a plurality of detected protection signals of the breakdown diode, so as to ensure that the thyristor valve string is in normal on-state for a period of time. The resistances and the capacitances connected in series arranged between the positive pole and the negative pole of each thyristor valve form a damp absorption circuit, and the resistances and the capacitances connected in parallel between the door pole and the negative pole of each thyristor valve form a circuit preventing the fault triggering of the thyristor. The limitation level of short circuit current is decided by the operation voltage of the breakdown diode. The damp absorption circuit restrains overvoltage in the closing process of the thyristor valves.
Owner:CHINA ELECTRIC POWER RES INST +2

Pressing and breakover process and laminating board structure of circuit board

The invention relates to a pressing and breakover process of a circuit board, comprising an inner-layer board and an outer-layer board which are made through blanking. The machining process mainly comprises the following steps of: making an inner-layer board circuit, pressing the outer-layer board, drilling, electroplating, printing, laminating boards, pressing laminating boards, making an outer-layer board circuit and printing with preventing weld paint; and then performing word printing, surface processing and shape machining for the obtained circuit board to obtain a finished product. The laminating board structure of the circuit board comprises a basal board which is formed by machining the inner-layer board and the outer-layer board through the steps, the upper surface and the under surface of the basal board are respectively provided with a layer of steel board, and the upper surface and the under surface of the steel board are respectively provided with a layer of kraft paper. Compared with the prior art, the invention has the characteristics that printing is connected with breakover, and the printing laminating boards are coherent together; relative to a laser blinding hole drilling process, the cost of the process is lower; and the laser blinding hole drilling process is changed into a pressing process subjected to printing, and normal breakover can be achieved after connection.
Owner:NETRON SOFT-TECH ZHUHAI CO LTD

Lithium ion battery positive electrode material lithium ferric manganese phosphate material and preparation and processing equipment of lithium ion battery positive electrode material lithium ferric manganese phosphate material

The invention relates to the technical field of nursery stocks, in particular to a lithium ion battery cathode material lithium ferric manganese phosphate material and preparation processing equipment thereof.The lithium ion battery cathode material lithium ferric manganese phosphate material is prepared from 70-100 parts of lithium iron phosphate, 5-10 parts of conductive material, 5-10 parts of binder, 5-10 parts of modified silver powder, 25-50 parts of deionized water, 1-3 parts of metal oxide, 2-5 parts of dispersing agent and 1-3 parts of low-temperature resistance material; the conductive material comprises a carbon conductive agent and a metal ion conductive agent, the ratio of the carbon conductive agent to the metal ion conductive agent is 1: 1, and the carbon conductive agent comprises one or more of carbon black, amorphous carbon, carbon nanotubes, carbon nanowires, carbon gel and graphene. The lithium iron phosphate battery has the beneficial effects that when the battery is used in a low-temperature environment, the resistance value of the low-temperature resistance material is increased due to temperature reduction, so that the calorific value of the lithium battery is increased, the lithium ion battery can be normally conductive due to temperature rise, and the lithium iron phosphate battery can continue to work.
Owner:ZHONGKE LITHIUM BATTERY NEW ENERGY CO LTD

Voltage division proportion adjusting circuit, switch control circuit and cooking utensil

The invention discloses a voltage division proportion adjusting circuit, a switch control circuit and a cooking utensil. The voltage division proportion adjusting circuit comprises: an oscillation loop, wherein a first end of the oscillation loop is used for being connected with a power supply, and a second end of the oscillation loop is used for being connected with a resonance end of an I GBT module; a first voltage detection end which is connected with the first end of the oscillation circuit through a first resistor; and a second voltage detection end which is connected with the second end of the oscillation circuit through a second resistor; The voltage division proportion adjusting circuit further comprises: a first adjustable resistor, wherein one end of the first adjustable resistor is connected with the first voltage detection end, and the other end of the first adjustable resistor is grounded; and/or a second adjustable resistor, wherein one end of the second adjustable resistor is connected with the second voltage detection end, and the other end of the second adjustable resistor is grounded. Thus, when the voltage of the mains supply is low or high, the resistance value of the first adjustable resistor or the resistance value of the second adjustable resistor is adjusted, so that the I GBT module can be normally conducted.
Owner:GREE ELECTRIC APPLIANCES INC

Compression-resistant cable

The invention relates to a compression-resistant cable which comprises a secondary cable and a primary cable. The primary cable comprises a first wire harness and a primary port, the primary port is connected with the first wire harness, the secondary cable comprises a second wire harness and a secondary port, the secondary port is connected with the second wire harness, the second wire harness comprises hollow insulating tubes and core wires, and the core wires are penetratingly arranged in the insulating tubes and are used for delivering media. The compression-resistant cable is characterized in that a compression-resistant tube is arranged on the outer sides of the insulating tubes, three arc-shaped grooves are uniformly formed in the inner side of the compression-resistant tube, circlecenter angles of the arc-shaped grooves are 270 degrees, a first cotton weaving protective layer is arranged on the outer side of the compression-resistant tube, a flame-retardant layer made from ceramic fiber materials is arranged on the outer side of the first cotton weaving protective layer, balls made from elastic materials are arranged between the flame-retardant layer and the cotton weavingprotective layer and are annularly uniformly distributed, and an insulating outer sheath which wraps the flame-retardant layer is arranged on the outer side of the flame-retardant layer. The compression-resistant cable has the advantages that external pressures can be effectively cushioned, accordingly, normal electric conduction can be assuredly carried out by cores of the compression-resistantcable, and the problem of core breakage can be solved.
Owner:昆山联连固电子科技有限公司

Lithium battery positive paste leak-proof structure and leak-proof method thereof

The invention discloses a lithium battery positive paste leak-proof structure. The structure comprises a battery body, a fixed plate and a conductor rod; a positive end of the battery body is fixedlyconnected with the fixed plate through a bolt, the middle part of one end, far away from the battery body, of the fixed plate is connected with a connecting pipe in hollow arrangement; a first fixingring and a second fixing ring are uniformly clamped at the external of the connecting pipe; the end part, close to the positive electrode, in the fixed plate is connected with a screwed joint, multiple damping springs are uniformly connected between the external of the screwed joint and the inner wall of the fixed plate; the end parts of the damping springs are connected with sleeved in the sleeving manner; one end of each sleeve is fixedly connected with an inner wall of the fixed plate. The positive end is more firm and hard to crack, the internal paste cannot leak, and the security performance is good. The stabilization performance is improved in the use, the positive electrode of the battery can be changed, the structure can be suitable for different demands in the use, and the conducting is uniform and stable. The positive end is hard to damage, and the battery can maintain good strength after falling off from the height or being impacted by other objects.
Owner:深圳市飞鹏新能源科技有限公司

Pressing and breakover process and laminating board structure of circuit board

The invention relates to a pressing and breakover process of a circuit board, comprising an inner-layer board and an outer-layer board which are made through blanking. The machining process mainly comprises the following steps of: making an inner-layer board circuit, pressing the outer-layer board, drilling, electroplating, printing, laminating boards, pressing laminating boards, making an outer-layer board circuit and printing with preventing weld paint; and then performing word printing, surface processing and shape machining for the obtained circuit board to obtain a finished product. The laminating board structure of the circuit board comprises a basal board which is formed by machining the inner-layer board and the outer-layer board through the steps, the upper surface and the under surface of the basal board are respectively provided with a layer of steel board, and the upper surface and the under surface of the steel board are respectively provided with a layer of kraft paper. Compared with the prior art, the invention has the characteristics that printing is connected with breakover, and the printing laminating boards are coherent together; relative to a laser blinding hole drilling process, the cost of the process is lower; and the laser blinding hole drilling process is changed into a pressing process subjected to printing, and normal breakover can be achieved after connection.
Owner:NETRON SOFT-TECH ZHUHAI CO LTD

Expansion joint of contact rail

The invention provides an expansion joint of a contact rail, which belongs to the technical field of rail transportation. It solves the problem of complex structure of the expansion joint of the existing contact rail. The expansion joint of the contact rail includes two elongated connection blocks respectively arranged in the accommodation grooves on both sides of the contact rail. The shape of the connection block matches the shape of the accommodation groove. The connection between the block and the two contact rails is pressed by at least one compression bolt that passes through the two connecting blocks respectively. The two contact rails can slide relative to each other along the length direction of the connecting block. The connecting block is made of conductive material. There is a gap between the two side surfaces of the block and the two inner side walls of the containing groove, and a spring contact finger in the shape of a strip is arranged between the inner end surface of the connecting block and the bottom of the containing groove. The expansion joint of the contact rail realizes a set of expansion joints to simultaneously realize the mechanical connection and the conductive connection of the connecting block and the contact rail, so that the structure of the contact rail is simpler and the weight is lighter.
Owner:浙江旺隆轨道交通设备有限公司

High-compression-resistance cable

The invention discloses a high-compression-resistance cable, which comprises a cable core and an insulating layer, wherein the cable core is arranged in a protective shell, the protective shell is ofa hexagonal structure, a buffer elastic layer is arranged on the outer circumferential surface of the protective shell, a cotton woven protective layer is arranged on the outer circumferential surfaceof the buffer elastic layer, an air bag protective layer is arranged between the insulating layer and the cotton woven protective layer, an elastic protective layer is arranged on the peripheral surface of the insulating layer, a damping assembly is arranged between the insulating layer and the elastic protective layer, and the damping assembly comprises a top column, a convex top and an elasticpiece. When the elastic protective layer is pressed, the top column is driven to slide relatively, the convex top abuts against the elastic piece to absorb pressure, when the pressure is too large andthe insulation layer deforms, the air bag protective layer and the buffer elastic layer ensure that external pressure can be effectively buffered, and the hexagonal protective shell is high in structural strength when being subjected to external force. Therefore, the wire core can conduct electricity normally, and the phenomenon of wire core breakage is avoided.
Owner:JIANGSU MINGYANG CABLE

Tandem resonant type fault current limit device

The invention provides a device for a breakdown diode to initiatively trigger a bypass of a thyristor valve string. The device comprises a plurality of thyristor valves connected in series and accessories thereof. A breakdown diode (BOD) is connected in a position between the gate pole and the positive pole of each thyristor valve. When faults such as short circuit happen in the electrical systemand a valve-based electronics (VBE) does not receive trigger signal of the thyristor valve string sent by a control and protection unit, the voltage at two ends of the thyristor valve string increases dramatically; when the forward voltage reaches the setting valve of breakdown voltage of the whole string of the breakdown diode (BOD), the breakdown diode (BOD) is converted to an on-state and sends trigger signal to the door poles of the thyristor valves depending on a sudden short circuit effect, the thyristor valves are in an on-state, and the valve-based electronics (VBE) automatically supplies trigger signals of the whole thyristor valve string according to a plurality of detected protection signals of the breakdown diode, so as to ensure that the thyristor valve string is in normal on-state for a period of time. The resistances and the capacitances connected in series arranged between the positive pole and the negative pole of each thyristor valve form a damp absorption circuit, and the resistances and the capacitances connected in parallel between the door pole and the negative pole of each thyristor valve form a circuit preventing the fault triggering of the thyristor. The limitation level of short circuit current is decided by the operation voltage of the breakdown diode. The damp absorption circuit restrains overvoltage in the closing process of the thyristor valves.
Owner:CHINA ELECTRIC POWER RES INST +2
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