Three-phase inverter based on programmable counter array

Abstract

The invention relates to a three-phase inverter based on a programmable counter array. The three-phase inverter comprises a control chip and a power module, wherein the input end of the power module is connected with the output end of the control chip; the output end of the control chip is additionally connected to the input end of the power module through a phase-inverter circuit; the power module provides working voltage through a rectifying device; and the output end of the power module is connected with a three-phase motor. According to the three-phase inverter, a singlechip integrated with the power module and STC12C5608AD is adopted, only a sinusoidal pulse width modulation (SPWM) control signal and a power supply are required to be loaded, and a frequency conversion three-phase alternating current power supply can be output; and therefore, the cost is greatly reduced, the operation time is reduced, and the three-phase inverter can be suitable for occasions with low speed regulation requirements.

Description

technical field [0001] The invention relates to the technical field of electronic power, in particular to a three-phase inverter based on a programmable counting array. Background technique [0002] With the development of power electronics technology, frequency conversion speed regulation technology of AC motors is more and more widely used in industrial production. At present, most of the common frequency conversion and speed regulation equipment on the market use frequency converters produced by major automation equipment manufacturers. In addition, there are also some simple frequency conversion speed regulation equipment developed by the automation system integrators themselves. The frequency converter has powerful functions and good speed regulation effect, but it is expensive; the self-developed frequency conversion speed regulation equipment commonly found in the market is relatively lower in cost than the frequency converter, but because its inverter often uses a d...

AI Technical Summary

Problems solved by technology

The frequency converter has powerful functions and good speed regulation effect, but it is expensive; the self-developed frequency conversion speed regulation equipment commonly found in the market is relatively lower in cost than the frequency converter, but because its inverter often uses a dedicated inverter control chip or High-priced chips such as DSP and FPGA are generally difficult to break through the cost bottleneck

[0003] Through research, it is found that many frequency conversion speed regulation occasions in the market do not have high requirements for speed regulation, but they use powerful and expensive frequency converters. In some occasions, the function utilization rate is even less than 1%, resulting in great waste.

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