219 results about "Transformer types" patented technology

The invention discloses a method for rapidly detecting ferromagnetic grain content in lubricating oil and a detection device thereof as well as a signal processing circuit. A transformer type electromagnetic sensor is adopted, and variation of related parameters of the electromagnetic sensor which is caused by variation of field distribution due to ferromagnetic grain in lubricating oil is detected, so as to detect ferromagnetic substance content in lubricating oil. Influence of nonferromagnetic pollutant can be naturally eliminated, higher linearity can be realized, meanwhile cost is low, and real time property is good.

The embodiment of the invention provides a mobile checking management method and system of power assets. The method mainly comprises the following steps: arranging an RFID (Radio Frequency Identification Devices) electronic tag on power asset equipment; downloading a checking task from a server of a mobile checking management system of the power assets by an information identification terminal; scanning the RFID electronic tag on the power asset equipment according to the checking task to obtain checking information of the asset equipment; uploading the checking information to the server; and counting and analyzing all the received checking information by the server to generate a power asset checking report. The embodiment of the invention can be applicable to various complicated scenes that a voltage grade of equipment is very high, and an inner part of transformer type equipment cannot be easily opened and the like, so that the efficiency of checking, detection or routing inspection work is greatly improved, and the checking accuracy is improved.

A first AC/DC converter circuit is coupled via two transformers to a second AC/DC converter circuit, the first AC/DC converter circuit having a symmetrical configuration of two switching elements performing complementary opened/closed switching, to alternately connect positive and negative terminals of a DC source to a junction between transformer primary windings. Each primary winding alternates between a condition of transferring electrical power to a secondary winding and a condition of serving as a choke coil which temporarily stores electromagnetic energy when a current flows through that primary winding and a primary winding of the other transformer.

The invention discloses a three-level inverter of a single-phase mixed bridge, comprising six switching tubes T1 to T6, four diodes D1 to D4, two electrolytic capacitors C1 to C2 and one output filter; wherein the four switching tubes T1 to T4, the two electrolytic capacitors C1 to C2 and the diodes D1 and D2 form a three-level single-phase converter unit of a diode middle point clamping position, the switching tubes T5 and T6, and the two electrolytic capacitors C1 to C2 form a single-phase half-bridge converter unit, a serial-connection branch circuit of D3 and D4 is connected with a serial-connection branch circuit of D1 and D2 in parallel, and the middle point of the D3 and D4 is connected with the middle point of the bridge arm of T5 and T6. The three-level inverter can effectively inhibit ground leakage current of the inverter, and has the advantages of high efficiency and simple modulating method, and the three-level inverter is suitable for a power supply inverter system which has strict ground leakage current, such as no-transformer type photovoltaic grid-connection inverter and the like.

The invention discloses a monitoring device and a monitoring method in a distributed-battery management system. The monitoring device comprises a loop structure and an isolation structure, wherein the loop structure comprises a low-voltage loop and a high-voltage loop; the high-voltage loop comprises an operational amplifier circuit which is integrated by use of single chips with high common mode rejection ratio and adopts a differential inputting-amplifying processing structure; and the isolation structure comprises a communication isolation chip adopting a transformer isolation structure. The monitoring method comprises the steps of receiving a signal, judging whether the signal is received or not, performing initialization settings, acquiring high-voltage loop data, performing transformer-type isolated transmission, processing low-voltage loop data, sending data and judging whether an exit condition is met. Through a technical proposal in the invention, the monitoring device and the monitoring method realize high security, reliability and extremely high accuracy in a battery monitoring process, as well as continuous rapid sampling, and have no special requirements on power supply sources.

This invention relates to a transformer type adjustable reactance, and the static reactive compensator made thereof. The reactance comprises: a parallet transformer unit, voltage source type inverter combniation unit and an adjustable reactance combination unit. Above-said inverter combination unit involves a double arm inverter power source series connected with current-limiting reactance. Adjustable reactane combniation unit involves (N-1) pieces of crystal valve tube throw-over reactance branches, each of which being parallel connection respectively antiparallet connection crystal valve tube T(i1) and a reactance X(i1). The compensator composed by above-said reactance comprises also: a fixed parallet capacitor unit, testing unit and a control unit. Advantages are: no need of special fitler, large capacity, low harmonic wave pollution, quick dynamic response.

The invention relates to a novel triggering method of a large-scale fast discharge linear transformer type driving source formed by connecting tens of stages of induction cavities in series. The novel triggering method comprises the following steps: adopting a triggering system containing n groups of triggering units for providing external triggering pulses for a n-stage induction cavity at the uppermost stream, and further realizing strong triggered closing of a gas spark switch corresponding to the induction cavity; enabling a front n-stage induction cavities to reach a (n+1)-stage induction cavities through spreading electromagnetic pulses which is superposed by voltage of secondary electromagnetic induction along a secondary transmission line; and coupling a switch in the (n+1)-stage induction cavity through a magnetic core, applying the overvoltage electromagnetic pulses in the secondary transmission line to the gas spark switch for realizing the fast overvoltage breakdown closing of the switch till the electromagnetic pulses achieve a load. By adopting the triggering method, the reliability of operation of an LTD (linear transformer driver) device and the triggering system thereof are improved, thereby having important value in popularizing an LTD (Laser Target Designator) to be applied in the national defense fields, such as inertial confinement fusion, fusion energy and the like; and furthermore, the realization of secondary coupling triggering can enable the LTD technology to obtain breakthrough development.

The invention relates to the fields of automotive electronics and artificial intelligence, and in particular discloses a pattern recognition-based vehicle anti-fatigue driving intelligent steering wheel and an anti-fatigue driving monitoring method. The intelligent steering wheel comprises a steering wheel shell (containing an alarm interrupt key), a steering wheel framework, an embedded system (containing a microprocessor, an application program and related algorithms which are solidified in an internal memory), a GPS module, an alarm, a transformer type sensor, a power supply system and an integrated circuit board. The steering wheel has the embedded system serving as a core, acquires the torque and voltage change of the steering wheel through the transformer type sensor, monitors a fatigue driving state by combining the pattern recognition and a sustained driving time parameter, and judges a parking or running state of the vehicle through the GPS data change so as to control the computation period of the sustained driving time. By using the steering wheel as a carrier, the pattern recognition-based vehicle anti-fatigue driving intelligent steering wheel has anti-fatigue driving monitoring function on the premise of not adding any facility, breaks through the research range of domestic video signal-based driver eye physiological characteristics, and improves the anti-fatigue driving practicability.

The invention discloses a compensator transformer type voltage regulation method and a device, wherein, the device comprises a compensator transformer bank, combination switches and a system controller; the compensator transformer bank is connected between a power supply and a load in series, and each terminal of a high-voltage winding of every compensator transformer is controlled by the two combination switches alternately; the switching state of the combination switch is controlled by the system controller; the system controller is used for determining the switching combination of the combination switches according to the output voltage of the load and the expected voltage input by the user, and for sending switching signals to the combination switches according to the switching combination. The invention also provides the compensator transformer type voltage regulation method. The invention can eliminate the overvoltage surge of the voltage regulation device generated in the switching process, thus effectively reducing the conduction loss.

The invention discloses an anti-theft detection method for road lamp cables. The method comprises the following steps: accessing a variable frequency current source connected with a reactor, a fixed resistor and a rotary switch in series between a neutral point of a road lamp transformer and a three-phase low voltage busbar; changing injected signal frequency of the current source, measuring current and voltage output from the current source, finding out resonance frequency of a single-phase road lamp circuit, and measuring the number of road lamps and total equivalent capacitance of road lamps connected with the measured road lamp circuit; judging the circuit cable to be stolen if the number of measured road lamps is unequal to the number of actual road lamps, locating the stolen road lamp cable, and sending alarm signals. The method is not affected by transformer type or circuit length, can help accurately determine the position of the stolen cable without adding equipment at ends of the cable, has the advantages of being safe, fast and widely applicable, and completely solves the problem of disconnection alarming for circuit cables which are stolen in a shutdown period of road lamp systems.

The invention relates to an alternating-current controllable paralleling reactor comprising a transformer type main reactor and a step reactor. Wherein, the first coil is the main coil which connects the network directly; the second coil is the control coil outside which a break and a thyristor controller are mounted; the third coil is the compensating coil outside which a filtering compensating unit is mounted; and the transformer type main reactor and the second side-connect step reactor are both mounted in a fuel tank to form the body of controllable reactor. The alternating step controllable single-phase paralleling reactor comprises the body with high resistance, the breaker, the thyristor controller and the central controller, and it has the functions and characters which common reactors do not have, including: simply adjusting, rapid response time, non-harmonic-wave, lower noise, lower vibration, high reliability, lower consumption, and it can separate the harmonic wave to reduce the effect to electrified wire netting. The invention can be used in the electrified wire netting of extra-high voltage and long-distance power transmission.

A multi-phase transformer type DC-DC converter. In one embodiment, the multi-phase transformer type DC-DC converter includes a plurality of DC-DC converters comprising a plurality of transformers, respectively, wherein the plurality of DC-DC converters are coupled in parallel between an input and an output. A circuit is coupled to the plurality of DC-DC converters and configured to generate a plurality of clock signals for use by the plurality of DC-DC converters, respectively, wherein the plurality of clock signals are phase shifted with respect to each other.

The invention provides a power flow control device and method for a run-through power supply system converter type traction substation, and relates to the field of power supply of an AC electrical railway. The power flow control device comprises a transformer type traction substation and an electrical railway run-through power supply system, wherein the electrical railway run-through power supply system comprises a plurality of converter type traction substations, wherein the input end of the control device is connected with a traction feed current transformer and a traction bus voltage transformer of the converter type substation, and is connected with a traction feed current transformer and a traction bus voltage transformer of the transformer type substation through an optical fiber, and the output end of the control device is connected with an AC-DC-AC converter control end of the converter type substation. The control method comprises the following step of adjusting the power of the converter type substation within an allowable voltage range of a traction bus by taking the current, the voltage and the power data of the transformer type substation as references so that the converter type substation and the transformer type substation approach the target of a train load on a traction network according to capacity proportion distribution. The control device is mainly used for the electrical railway run-through power supply system.

A contour and surface texture measuring instrument for measuring a contour and surface texture of a surface of a work W, whose configuration is simple and which can be implemented at a low cost, and which generates a displacement signal having a high resolution and high linearity in a wide measurement range is disclosed, the contour and surface texture measuring instrument having a measurement part 13 having a probe 13 configured to come into contact with the surface of the work W and to change its position vertically, a feed mechanism 14 configured to relatively move the work with respect to the probe, an arm 12 having the measurement part at one end and configured to transfer a displacement of the probe and to rotate with a pivot 16 as a center, and a differential transformer-type detection mechanism 51 and a scale-type detection mechanism 52 attached to the arm or a position interlocked with the arm and configured to detect a displacement of the probe.

The invention provides a method using a dynamic analog device for ultrahigh-voltage transformer type graded controllable parallel reactors, which is designed to accurately simulate a dynamic analog device for transformer type graded controllable parallel reactors with different capacities in 500 kV, 750 kV and 1000 kV power transmission systems. The primary side of the analog device body is in a single-phase discrete type, and three phases are connected to form a Y shape; and a primary winding is provided with 12 turn-to-turn fault taps which can respectively simulate 1-25% of turn-to-turn faults from the high-voltage side to the neutral point side. The secondary side of the analog device body is in a single-phase closed connection way, and the tail end is directly grounded. The capacities are divided into 9 grades: 100%, 75%, 62.5%, 56.25%, 46.875%, 37.5%, 31.25%, 18.75% and 15.625%. The primary side and the secondary side of the analog device body are respectively provided with a current transformer and a voltage transformer, thereby being capable of satisfying the demands for reactor body protection in a dynamic analog test. Aiming at the body protection on the ultrahigh-voltage controllable parallel reactors and the line protection on installation of the controllable parallel reactors, the invention provides a dynamic analog test method.

This invention relates to a desk lamp in which the base of desk lamp is provided with a power lead having a transformer-type plug at one end for plug-in connection with a socket connecting to commercial electricity, a battery chamber within the base for receiving batteries, and a light regulating circuit within the base which has a light regulating knob provided on and protruded to the outside of the base. In this way, the desk lamp not only can be lighten up for illumination purpose under different type power supply such as commercial electricity or battery, but also the light intensity of desk lamp can be regulated through the light regulating circuit by the light regulating knob according to user's demand. In addition, the desk lamp can be used as an emergency light by the use of additionally added batteries. Therefore, it has better performance in total practical application.

The invention provides a high-frequency low-insertion-loss switch, and belongs to the field of communication technology. The high-frequency low-insertion-loss switch comprises a transformer type differential inductor, a transformer type Balun, a capacitor, an NMOS (N-channel Metal Oxide Semiconductor) transistor and a transformer type differential inductor T-L1, wherein the transformer type differential Balun includes a transformer type Balun BA, a transformer type Balun BT and a transformer type Balun BR; and the capacitor includes a capacitor C, a capacitor CA, a capacitor CT and a capacitorCR, an NMOS transistor M1 and an NMOS transistor M2. Through adoption of the high-frequency low-insertion-loss switch, the deterioration of insertion loss caused by substrate leakage loss of a traditional radiofrequency switch at a high frequency can be relieved effectively. A differential switching structure overcomes the parasitic inductance effect of a grounding key and wire. The transformer type differential inductor improves the low quality factor of an on-chip inductor, and more importantly, the chip area occupied by the inductor is reduced.

The invention discloses a multi-gear transformer type voltage drop device which comprises a voltage drop device, a signal measuring module and a device protective module. The voltage drop device comprises a primary side controlled current source, a secondary side controlled current source, a primary side field winding, a secondary side field winding, a drop characteristic setting module, a three-phase impedance calculation module and a three-phase current calculation module. The primary side controlled current source is connected with voltage of power supply grid through a breaker, the secondary side controlled current source is connected with the input end of a tested device, the drop characteristic setting module is used for setting the voltage drop depth, a failure type, the drop speed and the drop time, the three-phase impedance calculation module is used for calculating impedance of a transformer three-phase winding, the three-phase current calculation module is used for calculating the current of the transformer three-phase winding, electrical parameters collected by the signal measuring module are sent to the device protective module, and the signal measuring module is used for protecting the device against the possibly-occuring faults. The multi-gear transformer type voltage drop device can simulate voltage drop experiments with different depths under various faults, and meet the penetrating testing requirements of low voltage of a wind motor set.

A method for testing the moment rigidity of a vehicle hub bearing unit is characterized in that an inner ring flange of a hub bearing unit 7 of a vehicle to be tested is fixed on a testing base 6; a combined loading sleeve 9 is fixedly mounted on an outer ring of the bearing unit; an adjusting thread sleeve 5, a radial tension sensor 4 and a radial slide block 3 are connected sequentially with one end of the bearing unit, and a radial cylinder 1 is connected with the end through a lever 2; the other end is connected with a radial slide block 10, and then connected with an axial cylinder 12, and a guiding rail 13 is adjusted to displace in line with the radial slide block; when in test, the radial cylinder applies a radial load one fourth as much as the weight of the vehicle, the axial cylinder applies the overturning moment as required, and the sensor measures the load; after the radial and axial load is applied, the hub bearing unit of the vehicle to be tested produces inclination on the horizontal section; a differential transformer type displacement sensor 8 measures the inclination of eight points; and the moment rigidity value of the hub bearing unit of the vehicle is obtained after computer software analyses and calculates the inclination of the eight collected points.

The invention provides a direct current transformer type multi-level output direct-current electrical source for quick trace reference. The direct current transformer type multi-level output direct-current electrical source for quick trace reference aims to meet requirements of some occasions needing quick change and trace reference of output voltage. Based on improvement of the prior art, the direct current transformer type multi-level output direct-current electrical source achieves the electrical source structure of single input and multi-level output by utilizing components such as a direct current transformer, a rectifier bridge and a power switch tube. A primary side of the direct current transformer is only connected with a direct-current electrical source, windings are increased in number in a secondary side, each winding secondary side is output in series connection mode after passing through the rectifier bridge and a filter capacitor, and switching on and switching off of the power switch tube can be controlled for achieving multi-level output in real time.

The invention relates to the technical field of control bar drive mechanism in a reactor structure, particularly discloses a differential transformer type control bar position detector. The detector comprises coil frames, wherein ring-shaped grooves are respectively and symmetrically arranged at the upper end, at the lower end and in the middle of each coil frame, and a bar position detecting coil is arranged outside each coil frame. The bar position detecting coils comprise compensating coils wound in the ring-shaped grooves at the upper end and the lower end of the coil frames, secondary coils wound in the ring-shaped groove in the middle of the coil frame, and a primary coil wound the outer wall of the whole coil frame. An inner barrel body is arranged in the coil frame and an outer barrel body is arranged outside the coil frame. The primary coil is led out from the outer barrel body. The primary coil passes through whole travel of a drive rod, can obtain bar falling time by collecting induced voltage signals during a bar falling process, can monitor in real-time control rod actual position, facilitates performing of drive mechanism bar falling experiments, and supports and protects the bar position detecting coil due to the fact that the inner barrel body and the outer barrel body are designed in and outside the coil frame.