S4828-based inverter power supply

A technology of inverter power supply and circuit, which is applied in the direction of conversion equipment for intermediate conversion to DC, which can solve the problems of affecting accuracy, long development cycle, and heavy software workload, and achieves improved efficiency, simple and convenient design work, and cycle time. The effect of shortening

Inactive Publication Date: 2017-06-20
李福来
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Problems solved by technology

Most of its control circuits are implemented by analog methods. The circuits are relatively complex and have temperature drift, which affects the accuracy and limits the performance of the system. The control...

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  • S4828-based inverter power supply

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Embodiment Construction

[0013] exist figure 1 In the figure, the three-phase AC input voltage is rectified and filtered as the input of the inverter bridge, and the dotted line in the figure is the output transformer. It can be seen from the figure that no separate filter inductor is used in the circuit. Instead, according to the principle of magnetic circuit integration, the transformer and filter inductor are integrated into a magnetic device, and then a filter network is formed on the secondary side of the transformer with an appropriate capacitance. A sinusoidal voltage output is obtained from both ends of the capacitor. The control circuit takes AT89C52 and SA4828 as the core to complete the generation of SPWM wave, system detection, control, update display and query buttons and other functions. SA4828 is a three-phase SPWM wave generator specially designed by MTIELE for motor control circuits, and can also be used for static variable frequency power supplies. It is an enhanced version of SA82...

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Abstract

Based on S4828 inverter power supply, its system hardware circuit is composed of main circuit, control drive circuit, protection circuit and keyboard display circuit, and the software adopts modular programming method. The protection circuit includes collector overvoltage protection, overcurrent protection, overload protection and overheat protection. When the real-time requirements of the inverter power supply based on the S4828 are not particularly high or not required, the multi-input and output encoder design is carried out by using the software and hardware resource programming of the single-chip microcomputer instead of the simplification of complex logic functions and wiring debugging, so that the design of this type of encoder The work becomes simple and convenient, the cycle is shortened, and the efficiency is improved.

Description

technical field [0001] The invention relates to the inverter power supply based on S4828. Background technique [0002] At present, most variable frequency power supplies use sinusoidal pulse width modulation, that is, SPWM technology. Most of its control circuits are implemented by analog methods. The circuits are relatively complex and have temperature drift, which affects the accuracy and limits the performance of the system. The control circuit composed of 80C196MC or TMS32OF240 as the core can realize full digital control of the power supply, but the system is more complicated. , The software workload is heavy and the development cycle is long. [0003] The enhanced SPWM wave generator SA4828 produced by MTIEL can be connected with a single-chip microcomputer to complete peripheral control functions and make the system intelligent. The single-chip microcomputer only takes a small amount of time to control it, so it has the ability to detect, protect, control, and disp...

Claims

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Application Information

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IPC IPC(8): H02M5/44
CPCH02M5/44
Inventor 李福来
Owner 李福来
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