DSP circuit in active filter device and application method thereof

Abstract

The invention provides a DSP circuit in an active filter device and an application method thereof. The DSP circuit comprises a DSP micro processing circuit, an FPGA circuit, a zero-crossing detectioncircuit, an analog-to-digital conversion circuit and an output driving circuit. The zero-crossing detection circuit and the analog-to-digital conversion circuit are in electrical signal connection with the DSP micro processing circuit, the DSP micro processing circuit is in signal connection with the FPGA circuit, the FPGA circuit is in electrical signal connection with the output driving circuit,the output driving circuit is externally connected to multiple bridge arms through electrical signals. Through the design of the zero-crossing detection circuit, the circuit only needs to detect a zero-crossing point of a certain phase without considering the amplitude of power supply voltage, through the design of the own circuit, excessive voltage is automatically adjusted to a preset amplituderange, the design of dead zone time logic, anti-through interlock logic and lock logic makes the number computing ability of the circuit outstanding, a self-protection effect is effectively achieved,and the burning of the circuit due to some common problems is avoided.

Description

technical field [0001] The invention relates to the technical field of circuit design of a measurement and control platform, in particular to a DSP circuit in an active filtering device and an application method thereof. Background technique [0002] The DSP measurement and control platform in the active filter device is a new type of measurement and control platform. It has the advantages of simple composition of acquisition and analysis circuits, outstanding digital computing capabilities, low cost, stable performance, convenient use and high efficiency. It is widely used in many fields such as manufacturing and large power grid systems. At present, the development of active filtering devices can be divided into three hot spots: production and cost of compensation equipment, integration of digital and artificial intelligence, and optimization of computing and processing capabilities. With the gradual maturity of digital chip technology, the development of digital artifici...

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Problems solved by technology

Currently existing filter devices are composed of analog controllers and capacitive and inductive components, but the components such as inductance and capacitance can only suppress some specific harmonics, and the influence between each inductance and capacitance is great, so the designed indicators cannot meet the dynamic response. Requirements, and the current filtering device is large in size and power consumption, which affects the response speed and controllability of the overall device

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