Features of Organization and Application of Active Balancing Cells with Extended Triggering Range of Shunt Circuits Keys in Ionistor Modules and Storage Devices of Joint-Stock Company “Elecond”

The solution of the problem of the deficit of voltage level for the complete unlocking of MOSFETs used as keys in the shunt circuits of the cells of the active balancing of ionistor storage devices is given. In particular, a revision of the widespread two-pole circuit of the active balancing cell of the ionistor consisting of a comparison circuit and a shunt circuit with a key on the MOSFET is presented. The relevance of the problem is confirmed by the results of the analysis of the characteristics of the key MOSFETs at the level of the unlocking voltage of 2.5...2.7 V from the output of the comparison circuit. It is shown that this voltage is not sufficient to provide the channel resistance corresponding to a fully open transistor and the flow of the specified shunt currents in the entire range of external influencing factors (VVF), especially when exposed to a reduced temperature from plus 15 to minus 60 °C. The solution presented in the paper for finalizing the circuit of the active balancing cell is that voltage boost circuits are introduced between the comparison node and the shunt circuit. Their use allows you to increase the voltage at the gate of the key MOSFET by two, three, four, etc. times, which ensures the reliable operation of the shunt circuit key for different shunt currents. A special feature of the developed cell circuits is the three-pole switching, in which an additional output is connected to the adjacent ionistor cell. This method of switching on the developed active balancing cells provides doubling of the unlocking voltage on the gate and is sufficient for reliable unlocking of the key on the MOSFET at all shunt currents at the level of the charging voltage of the ionistors in the storage device 2.5...2.7 V. For shunt currents of the order of tens of amperes, it is shown that it is necessary to switch to a quasi-four-pole switching of the developed active balancing cell due to the separation of the supply power circuits (measuring circuits) of the comparison circuit and the power buses of the level-up circuit with the shunt circuit. The methods of switching on the developed cells that allow multiplying the unlocking voltage at the gate of the key MOSFET by three, four or more times are shown. The schemes and criteria for the necessity of applying such inclusion are given. Practical testing of the developed three-pole and quasi-four-pole active balancing cells, carried out on the ionistor NEE of JSC “Elecond”, showed satisfactory stability and performance under the influence of the entire set of VVF.

THE METHOD AND MULTIPLE DEVICE OF A MATRIX SEARCH FOR SIMPLE AND COMPLEX SAMPLES

The research consists in the development of hardware pattern search methods that use the principles of shared access and parallel data processing inherent in associative memory. Reducing the search time is achieved through the formation and parallel processing of a binary (characteristic) matrix of comparisons of pattern symbols and text. A composite pattern has been introduced, it allows flexible description of search terms. The characteristic matrix is in the form of a parallelogram; it consists of rows shifted to the right, starting from the first row. This form allows you to conduct a parallel search for simple and composite patterns on the diagonal elements of the matrix. The developed method supports hardware search in the characteristic matrix. It is distinguished by the simultaneous consideration of local and distributed relationships between the elements of the diagonals and rows of the matrix. Separate calculation of starting values along the diagonals of the matrix allows you to independently search for two types of samples by calculating in the cells of the diagonals of the characteristic matrix of two output search functions. The method has linear time and quadratic hardware complexity. The clock pulse duration is determined by the sum of the delays of the comparison circuit for a pair of symbols, a D-flip-flop and a two-input element I. The homogeneous structure of the matrix search device, the use of standard operations allow the device to be implemented on a promising FPGA element base, which determines its use in high-performance systems for processing and transmitting heterogeneous information.

Research on Light Source Tracking Method of Photovoltaic Power Generation System

In this paper, a new type of solar energy automatic tracking controller based on single chip microcomputer is designed to improve the utilization rate of solar energy. Using AT89S52 microcontroller as the core control components, through two photoelectric sensors, signal is collected through the comparison circuit and A / D, the results will be outputted to the single-chip microcontroller for data analysis and processing before output to ULN2003A to control the five-wire four-phase step motor to achieve the tracking of the sun position. The system has the advantages of low cost, and has good anti-interference ability improving the utilization rate of solar energy. The design firstly completed the simulation of the program, and then mainly editing using C programming to complete the program design. Through the downloader the program will be programmed into the microcontroller. Finally, through the construction of hardware experiments to achieve the objective of designed tracking.

High Precision Synchronous Mechanical Motion Hydraulic Compensation Method

Auxiliary hydraulic system being based on sensor detection is designed to control two execution parts synchronization precision work in main hydraulic lines. To design a servo drive control valve with three working positions, its each position have an oil inlet and two outlets. This valve can come true compensation flow for the single cylinder or all cylinders of the main lines at the same time. Have designed a device is used to control the auxiliary valve-control compensating device by the grating sensor comparison circuit.

Handheld Lighting Circuit Detector Based on Alternating Electric Field

To find the point of failure of dark line will tend to make electricians helpless, so the design of handheld lighting circuits detector is necessary. This article discribes the main idea of probes inducing the alternating electric field around electricity cables[1]. The collected signal in system is processed through the amplification, filtering, comparison circuit and STC12C5A08AD. Finally, real-time display grid numbers and testing time on 12864. The system’s functions include position detection, discrimination, position records and others. The system can well distinguish different cable. After testing and certification, system is reliable, stable and with practical value.