The technology of power batteries is an important factor on performance of EVs. In order to ensure the uniformity of the single cells, an evaluation method based on sample digital characteristic is proposed. The data from a complete charging-discharging process is collected and quantified, then the differences...

insulator is an important part of transmission line, and its maintenance of is of great significance. Duo to The insufficiency of traditional way of insulator detection, this paper puts forward a kind of automatic on-line detection method. The sliding carriage which carries a detection device slides...

Phase angle and amplitude of a phasor can be provided by method of least squares error (LSE). LSE adopted iteratively is able to track the frequency and amplitude of power system in steady states and in kinds of non-steady ones. Iterative LSE with resampling is analyzed in conditions of off-nominal input,...

As it is scant for the linear power amplifier and the two-level switching power amplifier, the principle is analyzed for the three-level power amplifier. It is proposed for the power amplifier for magnetic bearings based on the three-level PWM modulation technique. The circuit is designed for the implementation...

The paper introduces the process of designing an efficient flyback switching power supply on basis of LM5021 chip. It describes the process as the following 3 steps:1) designing a current-limiting circuit; 2) calculating the parameters of the transformer for the switching power supply and designing a...

Electromagnetic interference is now a hot research topic, in order to ensure reliable operation of the system, you must suppress EMI device from generating sources of electromagnetic interference suppression is more effective EMI suppression methods, through the use of double-pulse modulation, can effectively...

10 kv distribution network directly related to the user, the reliable power supply capacity and quality of power supply is not only the direct embodiment of the electric power enterprise economic benefits, and affect the safe and stable operation of the power grid. Electrical fault characteristics generally...

Currently, our country power-stolen phenomenon still stands out in a certain scope. Power theft not only results in enormous economic loss to the power industry, but also poses a threat on the safety and reliability of the system power supply, leading to high line loss.suggestions of power supply enterprise....

Based on a detailed analysis and research of power system load power consumption demand model, on the basis of through offline and online status of demand planning, design a kind of optimal power grid scheduling policy. The scheme can minimize a cycle of the grid operating costs, then strengthen the...

The motor working in super-synchronous speed need the frequency converter with frequency power supply, but the high fee of the converter lead poor engineering economy. Design a simple and reliable method to make sure the motor could work in twice of original speed. The frequency multiplication power...

With the continuous development of smart grid scale, smart grid would be realized in the power system and it has increasingly demands for processor resources and storage resources of the power system. Proposed smart cloud of power system which could make use of the existing intelligent processors and...

Based on the ECG monitoring instrument and ECG signal research, design a series of ARM chip based on STM32 as the core of the portable home ECG detection equipment. The device with three electrodes of ECG signal acquisition, due to weak signal acquisition processor cannot directly handle the ECG acquisition...

The paper established a single-degree-of-freedom model for Active magnetic bearing (AMB) system, on the purpose to analyze the stability range of parameters for AMB close-loop system under the control of PD. Furthermore, it focused on the study of relationship between the AMB system's stiffness and the...

Developing technology is critical for the lithography technology in the field of integrated circuit (IC). The developing nozzle and process are the "hard” and "soft" technology, respectively. It is the continuous improvement and innovation of developing nozzle and process that drive the rapid development...

This paper describes a method for the analysis and design of dual control dimming UHF electronic ballasts. It includes a PFC converter circuit and a T-type inverter circuit, the ballast operating at the highest point above the acoustic resonance frequency can effectively avoid the high-intensity discharge...