The Research And Design Of High-voltage Inverter

With China's increasing economic growth, total demand for energy is increasing, but now the world has become increasingly scarce energy reserves, in this case, to maintain economic growth rate continued to grow how to ensure sustainable growth, while At present, China becomes an important issue to be resolved urgently. In this context, China's chemical, steel, cement and other key energy-consuming industries in order to ensure completion of the government's goal of energy saving requirements, all have been technological innovation, enterprise development and cost reduction, but also reduce the heavy dependence on energy in improving the economic efficiency of enterprises, while continuing to focus their social benefits, high-voltage inverter emerged as a capable and effective energy saving high-tech products.Multi-level cell in series inverter power unit is used in series of methods to achieve high output energy saving device, its output is generally a multi-phase PWM power shift mode, in order to achieve low output voltage harmonics, du/dt and the total The purpose of the small-mode voltage. It is a multiple of the input isolation transformer input harmonic suppression.Involved in multi-drive technology series is a separate phase by several low PWM phase in series with the power unit, power unit consists of multi-winding transformer Yanbian triangle segmentation unit to achieve power, high-speed microprocessor device or DSP (digital signal processing) to achieve control and optical isolation for drivers.Project on the main controller for the modular unit, the DSP-CPU dual-core unit, achieved through the bus interface board with the three-phase phase-controlled board of information exchange. From the digital input board and the board accepts analog input operation commands, such as current and voltage information, CPU board is based on these data to calculate the control information and status information.In this paper, high-voltage inverter stage, the practical application of domestic and international background, research and development of a high-performance CPU-based high-performance high-voltage inverter. The structure of the entire high-voltage converter and the working principle of the overall design of the hardware and the structure of the relevant sub-module design, highlighting the power unit and main control unit functions to achieve. Basic functions of the equipment, the basic performance is tested to ensure high precision measurement devices, anti-interference ability, superior performance, to make it better used in a variety of site conditions.