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AC programmable power supply high-precision measuring circuit

A measurement circuit and high-precision technology, which is applied in the field of high-precision measurement circuits of AC programmable power supplies, can solve problems affecting sampling measurement accuracy, output voltage stability, output waveform distortion, etc., to improve sampling measurement accuracy, reduce sensitivity, The effect of enhancing the ability to resist radio frequency interference

Active Publication Date: 2012-05-30
山东精久科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This puts forward high requirements for effective value sampling and instantaneous value sampling. Traditional A / D sampling chips can no longer meet the requirements, which affects sampling measurement accuracy, output voltage stability, and output waveform distortion.

Method used

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  • AC programmable power supply high-precision measuring circuit
  • AC programmable power supply high-precision measuring circuit

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Embodiment Construction

[0009] The present invention will be further described in detail below in conjunction with the accompanying drawings and preferred embodiments.

[0010] see figure 1 , the present invention includes a CS5460A chip, including a CS5460A chip, the CS5460A chip is connected to the CPU and peripheral circuits, the pin 15 of the CS5460A chip is connected to the pin 16 through a capacitor C1, and one end of the capacitor C1 is connected through a serial connection of a resistor R1 and a capacitor C4 Grounding, the other end of the capacitor C1 is grounded through the capacitor C3, one end of the capacitor C3 is also connected to the current input negative terminal through the serial connection of the resistor R3 and the inductor L1, and one end of the capacitor C4 is also connected through the serial connection of the resistor R4 and the inductor L2 Connect to the positive terminal of the current input.

[0011] The pin 9 of the CS5460A chip is connected to the pin 10 through a capa...

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PUM

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Abstract

The invention discloses an AC programmable power supply high-precision measuring circuit. The measuring circuit comprises a CS5460A chip connected with a CPU and an peripheral circuit; the measuring circuit is characterized in that: a pin 15 of the CS5460A chip is connected with a pin 16 by a capacitor C1, one end of the capacitor C1 is also earthed by a resistor R1 and a capacitor C4 which are connected with each other in series, the other end of the capacitor C1 is earthed by a capacitor C3, one end of the capacitor C3 is connected with a current input negative end by a resistor R3 and an inductor L1 connected with each other in series, and one end of the capacitor C4 is connected with a current input positive end by a resistor R4 and an inductor L2 which are connected with each other in series. The measuring circuit of the invention can precisely measure and calculate active electric energy, instantaneous power, effective value of current, effective value of voltage, instantaneous value of current and instantaneous value of voltage, and improve precision of sampling measurement, stability of output voltage and distortion degree of output waveform to a large extent.

Description

technical field [0001] The invention relates to a power measurement circuit, in particular to a high-precision measurement circuit for an AC programmable power supply. Background technique [0002] With the development of society, many laboratories put forward higher requirements for the output voltage stability, waveform distortion and sampling measurement accuracy of variable frequency power supply. In order to meet the needs of social development, we abandoned the traditional phase-locked loop frequency synthesis technology and adopted TMS320F2812 Direct generation of pulse width modulated signals. This puts forward very high requirements for effective value sampling and instantaneous value sampling. Traditional A / D sampling chips can no longer meet the requirements, which affects sampling measurement accuracy, output voltage stability, and output waveform distortion. This is the weak point of prior art. Contents of the invention [0003] The technical problem to be s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R31/42
Inventor 华要宇李贤杰杨献木刘霄锐白佩佩
Owner 山东精久科技有限公司
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