217results about How to "Reliable isolation" patented technology

A coupling circuit arrangement for data communication over a power line comprises a modulator/demodulator circuit for modulating data signals for transmission over the power line, and for demodulating signals which have been transmitted over the power line into data signals, a power supply circuit, and isolation means for providing galvanic isolation from the power line. The isolation means comprises light emitting elements and light detecting elements, which are arranged between the modulator/demodulator circuit and the power line. The isolation means may also be used to transmit a digital control signal which indicates the status of the power supply circuit or an over-temperature condition, or which is a transmit enable signal. The digital control signal may be encoded in the analog data signal by a digital shift in the DC bias level or by a complete removal of the DC biasing signal.

The invention relates to the field of products of sound insulation material, solves the problems in the prior art that the sound insulation material is poor in sound insulation effect, is incomprehensive in high and low frequency sound insulation, causes pollution and is easy to age, and provides an efficient sound insulation material and a manufacturing method thereof. The efficient sound insulation material includes a sound insulation layer, a sound absorption layer, and a bubble layer, wherein the bubble layer is located between the sound insulation layer and the sound absorption layer. The sound absorption layer is made of a sound insulation compound, and the sound insulation compound is prepared by raw materials of the following substances: a thermoplastic resin, inorganic fillers, and a foaming agent, wherein the inorganic fillers account for 15-80wt%, the foaming agent accounts for 5-15wt%, and the rest is the thermoplastic resin. In the efficient sound insulation material, the fillers with different particle diameters correspond to sound waves of different wave bands or frequencies, and thus consumption of sound energy of different frequencies is relatively comprehensive, and the sound insulation effect is good, so the sound insulation material is suitable for popularization and application.

A valve assembly and method of actuating a valve blade in a processing chamber through the use of magnetic force coupling is disclosed. The valve assembly comprises a valve rod for imparting a reciprocal motion to a valve blade which opens and closes a valve, the valve rod having at least one magnet mounted thereupon. A housing seals the valve rod and valve blade from the ambient, and an actuator rod in the ambient, having at least one complementary magnet mounted thereupon, aligns with the magnet on the valve rod to form a magnetic coupling through the housing. An actuator mechanism then provides a reciprocal motion to the actuator rod, which transfers the motion through the magnetic coupling to the valve rod and valve blade. Multiple actuator mechanisms can also be employed to vary the force applied to the valve blade to further increase the life of the valve assembly while still providing a strong seal between processing chambers. The design allows for very high speed operation of the valve with low maintenance costs.

The invention discloses a fault diagnosis comprehensive positioning method for an intelligent distribution network, and belongs to the field of fault monitoring. Based on a fault indicator, a wirelesscommunication technology and a ground fault line selection technology, the method comprises the following steps: monitoring zero-sequence voltage of a transformer neutral point in real time, startingzero-sequence fault diagnosis when detecting that a zero-sequence voltage change value exceeds a preset value, and identifying whether the zero-sequence voltage change value is a single-phase grounding fault; if the zero-sequence voltage change value is single-phase grounding fault, performing grounding line selection through a fault diagnosis device in a station, and positioning the grounding fault on a certain phase of a certain line; when the single-phase earth fault is judged to be a stable fault, recalling the real-time current data of the fault indicators on the fault phase line, comparing the signals collected by the fault indicators, comparing the difference of the real-time current data before and after a fault point, judging the two fault indicators with abrupt changes, and thendetermining the specific section of the fault. The method can be widely applied to the field of power distribution network operation fault monitoring and positioning.

The invention provides a turn-to-turn zero-sequence differential protection method and device for the valve side winding of a series transformer. The turn-to-turn zero-sequence differential protectionmethod comprises the following steps: firstly calculating the starting threshold value and braking coefficient of zero-sequence differential current, then determining zero-sequence differential current starting criterions and valve side winding turn-to-turn zero-sequence differential protection criterions, and finally judging whether valve side winding turn-to-turn zero-sequence differential protection is of actions. In the turn-to-turn zero-sequence differential protection method for the valve side winding of the series transformer provided by the invention, when a small turn-to-turn fault occurs in the valve side winding, under the premise that the protection of a unified power flow controller is free of action, turn-to-turn protection can be accurately and rapidly acted, rapid isolation of the turn-to-turn fault of the valve side winding is guaranteed, the valve side winding is avoided from being damaged, and safe operation of the series transformer is guaranteed.

A transformer bobbin has a body with first and second ends spaced along a longitudinal axis. Conductive pins are mounted in the ends and dimensioned for electrical and mechanical connection with first and second wire windings received in the body. An opening in the body is dimensioned to receive a ferrous core, and an external winding surface on the body extends between the first and second ends. First and second margin barriers are provided inwardly of the first and second ends of the winding surface. The margin barriers have a height that extends a predetermined dimension that closely approximates the height of the first winding. The margin barriers electrically isolate the first winding from the second winding that is thereafter received over the body. Preferably, at least one of the first and second margin barriers includes channels therethrough dimensioned to receive the first winding wire for connection with the pins.

An electrical isolation barrier for use in a Data Access Arrangement uses a high frequency (HF) transformer 24 to provide isolation. An input signal, which may be analog or digital, is connected to a modulator. The analog output of the modulator is connected to the input of the HF transformer. The output of the HF transformer is connected to the input of a demodulator. Simple amplitude modulation can be used in the modulator to modulate the input signal to the frequency range of operation of the HF transformer. A simple low pass filter may be incorporated in the demodulator to remove harmonic distortion caused by the HF transformer. The output signal of the demodulator is substantially the same as input signal.

The invention discloses a multi-tenant resource management method. The method comprises following steps: when there is a newly increased tenant, distributing a special data center node to the tenant, wherein the data center node provides all application systems demanded for processing services to the tenant; and distributing special physical resources to the data center node through a preset resource distribution algorithm. The invention also discloses a multi-tenant resource management device. According to the method and the device of the invention, different tenant data are in mutual independence; different tenants cannot invoke the data mutually; meanwhile, the technique complexity is reduced; and the stability is increased.

A lung isolation system configured for selective isolation and ventilation of the lung in conjunction with a standard endotracheal tube. The system includes an expandable bronchial isolation tube comprising a collapsible nitinol frame, a bifurcated adapter, and a steerable optical stylet.

The invention relates to the field of energy storage systems for lithium batteries, in particular to a mobile energy storage control system for lithium batteries. The mobile energy storage control system comprises a solar panel set, a bus unit, an access switching unit, an energy storage chopping unit, a battery equalizer, an energy storage lithium battery set and a system controller, and is characterized in that a channel of control contact points of the access switching unit is sequentially connected with a bidirectional inverter and an electric switching unit, and the electric switching unit is respectively connected with a supply network, an electric load and the system controller; and a system computer in the system controller is respectively connected with the bus unit, the access switching unit, the bidirectional inverter, the energy storage chopping unit, the battery equalizer, a battery temperature detecting unit and the electric switching unit by Profibus-DP (decentralized periphery) and Modbus field buses to form an intelligent network control system. Compared with the prior art, the mobile energy storage control system has the advantages that photovoltaic power generation is integrated with off-peak electricity utilization, photovoltaic power generation is implemented and generated electricity is stored in daytime when sunlight is sufficient, and off-peak electricity is stored at night.

An apparatus for isolated transformation of a first voltage into a second voltage includes a motor (15), which is powered by the first voltage and whereof the motor drives a generator (16) utilizing a coupling means, for example, a shaft (17) or a belt drive, whereof the rotation of the shaft generates the second voltage off the generator (16). At least a portion (18) of the coupling means, for example, the shaft (17), is made of an electrically isolating material featuring a dielectric constant of approximately 1 and is of such a dimension that the capacitance of the generator related to Ground is at maximum 10 pF, preferably 5 pF. The apparatus is in particular suited to provide a voltage for supply of electronic measurement devices, which are used for impedance measurements at the human body because the apparatus meets requirements for medical safety, keeps the electrical capacitance of the measurement circuit powered by the generator at a minimum, does not transform disturbances present at the first voltage to the measurement circuitry, and doesn't generate disturbances by itself.

The invention discloses a heat insulation wall. A wall inner plate, a heat insulation layer, a thin iron plate layer, a corrugated iron plate layer and a thick iron plate layer are arranged from the interior of the house to the exterior of the house sequentially; all layers are fixedly connected with each other; an air inlet channel and an air outlet channel are formed between the lower side of the corrugated iron plate layer and the exterior of the house, and between the upper side of the corrugated iron plate layer and the exterior of the house respectively; convex-concave grooves of the corrugated iron plate layer are communicated with the air inlet channel and the air outlet channel; and a plurality of through air holes are formed on the part of the thick iron plate layer adjacent to the air inlet channel. In an energy-saving heat insulation house, a roof frame consists of profile steel; a solar water heater is arranged on a roof; a heat collector of the solar water heater is used as a roof tile of a sunny slope or is arranged below and close to the roof tile of the sunny slope; the shape and the size of a water tank adapt to the inner outline of a ridge; and the water tank is positioned in the ridge. The heat insulation wall has the high heat insulation and ventilation performance, and the heat collector of the solar water heater is used as the roof tile of the sunny slope or is arranged below and close to the roof tile of the sunny slope so that the solar energy heat absorbed by the roof can be fully utilized.

The invention relates to a substrate integrated multi-mode filter which is based on a square high-order mode cavity, the upper surface and the lower surface of a medium substrate (1) are respectively coated with an upper surface metal (7) and a lower surface metal (8), a metalizing through hole array (2) penetrates the medium substrate (1), the upper surface metal (7) and the lower surface metal (8); a first inductive column (3) and a second inductive column (4) which can play the roles of regulating the eigenfrequency of different modes and coupling between the modes are positioned in a square cavity which is surrounded by the metalizing through hole array (2); a first metal column inductive window (7) and a second metal column inductive window (8) are respectively arranged on the adjacent two sides of the square cavity, the cavity can realize the coupling of the input and the output of energy by metal column inductive windows; a first metalizing through hole array (5) and a second metalizing through hole array (6) are respectively positioned at the first metal column inductive window (7) and the second metal column inductive window (8) to be corresponding to the input and the output of the cavity of the filter, which are connected with an external circuit.

The disclosed process consists in filling the gap between a billet and the wall of a sectional mould with a molten slag in at least two stages. When the first portion is poured in, the gaps between the sections of the mould are filled. Once the slag in the gaps is solidified completely, voltage is supplied and the second and next portions of the slag are added. The creation of an electromagnetic field inside the mould takes place following the starting of the cladding process. The liquid metal is then added for the cladding process, which is carried out by means of the stable rotation of the slag and metal. The process can be carried out with varying levels of slag inside the current-carrying part of the mould. The billet can be preheated at the short-circuiting conditions prior to the cladding process.