33results about How to "Convenient redundant design" patented technology

The invention provides a non-fire-worker-driven two-stage compressing releasing mechanism. Pretightening force applied to the mechanism can be accurately measured by means of strain gages; in the compressing state, a separating cap is limited by upper balls; a releasing pin is clamped by lower balls; the positions of the upper balls are determined by the separating cap, an upper retainer and the releasing pin; the positions of the lower balls are determined by the releasing pin, a sliding block and a lower retainer; and the sliding block is compressed by an anti-impact spring. During releasing, a non-fire-worker-driven element is powered on to start working to drive the sliding block to upwards move, after the sliding block upwards moves by a certain distance, the lower balls enter a groove of the sliding block, the releasing pin is unclamped and moves downwards under the effect of a driving spring, then the upper balls are unrestrained and fall into a groove of the releasing pin, theseparating cap is separated, and thus releasing is completed. In this mechanism, a plurality of spherical pairs are adopted, the influence of moment transferring on the part cooperation relationship and the releasing reliability is avoided, and meanwhile the mounting accuracy requirement is reduced; and control is convenient, vibration resistance is high, the borne load is large, and reliability is high.

An embodiment of the present invention provides a power electronic transformer, the power electronic transformer includes: a high-voltage module, a low-voltage module and a soft copper bar, wherein the high-voltage module and the low-voltage module realize the rectification stage, isolation stage and inverter stage function, the high-voltage module includes the circuit of the rectification stage and the high-frequency chopper in the isolation stage, the internal connection terminal of the circuit of the rectification stage is connected to the first high-frequency chopper in the isolation stage A connection terminal connection; the low-voltage module includes the high-frequency transformer in the isolation stage and the circuit of the inverter stage, and the internal connection terminal of the circuit of the inverter stage is connected to the high-frequency transformer in the isolation stage Secondary side connection; the second connection terminal of the high frequency chopper in the isolation stage is connected to the primary side of the high frequency transformer in the isolation stage through a soft copper bar. This scheme is beneficial to reduce the overall size, cost and complexity of the system, is beneficial to the redundant design of the system, and improves the reliability of the system.

The invention relates to a hydraulic winch driving mechanism of a crane. The hydraulic type winch driving mechanism mainly comprises hydraulic motors, speed reducers, a rotary rolling disc, a windingdrum and a structural frame of the winding drum, a bearing seat support and a hydraulic control system. According to the hydraulic winch driving mechanism, the plurality of sets of hydraulic motors and speed reducers are adopted for driving, and small gears of the speed reducers are meshed with a large gear ring of the rotary rolling disc to transfer torque; each group of the speed reducer and thehydraulic motor serves as a driving unit, and the plurality of driving units are uniformly distributed on the circumference of the large gear ring of the rotary rolling disc; a standby unit can be additionally arranged through the driving mechanism, and the driving mechanism has the advantage that when a certain unit breaks down, the fault unit is removed firstly, and a new driving unit can be intervened; and the driving units are controlled by a control valve, and intelligent switching can be realized according to the form of the fault; and the hydraulic control winch driving mechanism has redundant design.

The invention relates to a bidirectional multiport non-isolated DC converter and a control method thereof. The DC converter comprises at least two DC converter modules, and one end of each DC converter module is connected with a micro power grid; each DC converter module comprises an upper diode module, a lower diode module, a capacitor C1 connected with the upper diode module in parallel and a capacitor C2 connected with the lower diode module in parallel, and the upper diode module and the lower diode module are connected in series; the upper diode module comprises an upper diode switch T1 and a lower diode switch T2 which are connected in series, and the lower diode switch T2 is connected with a capacitor C3 in parallel; and the lower diode module comprises an upper diode switch T3 and a lower diode switch T4 which are connected in series, and the upper diode switch T3 is connected with a capacitor C4 in parallel. The control method comprises a positive bus voltage control process, a negative bus voltage control process, a positive bus current control process and a negative bus current control process. Each module of the application can achieve bidirectional flow of energy, and can specify voltage or power of a port as needed.

A single-bus design method for space application optical fiber gyroscope combination, characterized in that: the system circuit and the gyroscope interface are connected by bus, the receiving data lines of the three gyroscopes are hung on a single bus and connected with the system sending data lines, and the three gyroscopes The sending data line is hung on a bus and connected to the system receiving data line. The system and the gyroscope adopt a master-slave communication method. The system is the calling party. The identification codes of three gyroscopes are agreed in advance, and the system sends an identification code to the three gyroscopes at the same time. , the gyroscope whose identification code matches occupies the bus and sends data to the system, and releases the bus after sending data. The invention can transmit data conveniently, quickly and accurately, and can select the required information according to the requirements of the system, has strong initiative, improves reliability, reduces weight, and each gyroscope can be individually debugged, and the interchangeability is excellent. powerful.

The invention discloses a fiber-optic gyroscope assembly with separated optically sensitive part and signal processing part. The optically sensitive part comprises three totally independent fiber-optic gyroscopes. The sensitive axes of the gyroscopes are orthogonally and obliquely arranged on the lateral surface of a cone with a semi-cone angle of 54 degree 44' 08''. The signal processing part comprises three totally independent signal processing circuits and one secondary power supply module. The secondary power supply module comprises three totally independent secondary power supply circuits. For electrical functions, the assembly comprises three totally independent angular velocity measuring channels; each channel comprises one secondary power supply circuit, one signal processing circuit, and one fiber-optic gyroscope; the independence of measurement is improved; at the same time, the fault isolation is realized, the reliability of the assembly is enhanced; a three axes oblique arrangement scheme is adopted so that the assembly can conveniently cooperate with other gyroscope assemblies to carry out redundancy configuration, and the measurement precision is improved.

The distribution network-level high-frequency isolation type flexible DC converter disclosed in the present invention is formed by interconnecting 3n or 6n high-frequency isolation type basic power units, and the high-frequency isolation type basic power units include sequentially connected non-isolation type DC / DC converters, isolated DC / DC converters and non-isolated DC / AC converters; the input terminal of the non-isolated DC / DC converter is used as the DC input terminal of the high-frequency isolated basic power unit, so The output end of the non-isolated DC / DC converter is connected to the input end of the isolated DC / DC converter, and the output end of the isolated DC / DC converter is connected to the input end of the non-isolated DC / AC converter The output terminal of the non-isolated DC / AC converter is used as the AC output terminal of the high-frequency isolation type basic power unit; the invention realizes the bidirectional transmission, electrical isolation, waveform of medium voltage DC power to medium voltage AC power Control and other functions, and at the same time adopt a modular series-parallel design, which is easy to expand and can meet the needs of medium-voltage, medium- and small-capacity power conversion.

The invention relates to a cascade current converter, which is characterized by comprising at least two current converter bridge arms. Each current converter bridge arm comprises a first bridge arm unit and a second bridge arm unit which are connected in series; the series connection point of the first bridge unit and the second bridge unit in each current converter bridge arm is connected with an alternating current outgoing line; the other two ends of the first bridge arm unit and the second bridge arm unit are respectively connected with the anode and the cathode of a direct current bus; the first bridge arm unit comprises n B-shaped bridges (Mj1) connected in series, and the second bridge arm unit comprises n B-shaped bridges (Mj2) connected in series, wherein ji=1...n, j2=n+1...2n, nis a cascade number and n is not less than 1. The invention is mainly used for high and mid-voltage-grade power grids and loads.

The invention provides a photovoltaic grid-connected power generation system based on middle and high voltage direct current access. The system comprises at least one middle and high voltage direct current power generation unit and a middle and high voltage centralized PV grid-connected inverter. Each of the direct current power generation unit comprises multiple groups of PV arrays and cascaded direct current boost units. Each group of the PV arrays comprises a plurality of arrays which are connected in parallel. The output end of each group of PV arrays is connected to the input end of one cascaded direct current boost unit. The output end of the cascaded direct current boost unit is connected to one path of middle voltage and high voltage direct current bus and is used for raising the direct current voltage outputted by each group of PV arrays and carrying out bus out in a mode of series connection to the path of middle voltage and high voltage direct current bus. Each path of middle voltage and high voltage direct current bus which is respectively connected to the output end of each of the cascaded direct current boost units is connected in parallel to form a path of middle voltage and high voltage direct current bus which then is connected to the direct current side of the middle and high voltage centralized PV grid-connected inverter, and the alternating current side is connected to a middle and high voltage alternating current power grid. According to the photovoltaic grid-connected power generation system, the line loss can be reduced, and the cost can be reduced.

The controlled reactor is composed of three phase three winding transformer and module of low voltage silicon controlled reactor. The said transformer is in connection of Y / Y / delta. Through leads in three phases, high voltage side in star connection is connected to three phase electric network. The said reactor in low voltage includes two pieces of TCR modules; one module is connected to delta winding at low voltage side of the transformer, and the other module is connected to star winding. Advantages are: continuously adjustable wattless power, quick response speed, without need of filtering device since very small harmonic wave within adjustment range of capacity, parallel structure easy to be expanded in capacity and to be designed in redundancy, and reduced cost.

The invention discloses a modular full direct current photovoltaic system and a control method thereof. The system comprises n DC (direct current)-DC converter modules and an MMC (Multi Media Card) centralized inverter, and every DC-DC converter module is connected with an independent control loop and a maximum power tracking control function so as to ensure that a photovoltaic battery pack connected with every DC-DC converter works on the highest point of the output power. According to the modular full direct current photovoltaic system and a control method thereof, a direct current bus is formed by connecting the output ends of a plurality of DC-DC converter modules in series, and the high-power grid-connected power generation function is achieved through the centralized MMC inverter. The direct current bus can effectively reduce the operating loss of the entire system and structurally improve the operating efficiency of the system.