Direct current (DC) bus voltage-sampling circuit of servo system converting voltage into frequency

A DC bus voltage technology using voltage, applied in voltage/current isolation, measurement using digital measurement technology, etc., can solve the problems of low precision, poor input and output linearity, low reliability, etc., achieve wide bandwidth and prevent rising process , the effect of improving performance

Inactive Publication Date: 2010-06-02
HANGZHOU RIDING CONTROL TECH
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  • Application Information

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Problems solved by technology

[0008] The present invention solves the problems of poor input and output linearity, low reliability and low precision in the existing DC bus voltage sampling circuit of the servo system, and provides a voltage-to-frequency converter with good input and output linearity, high reliability and high precision. Servo system DC bus voltage sampling circuit

Method used

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  • Direct current (DC) bus voltage-sampling circuit of servo system converting voltage into frequency
  • Direct current (DC) bus voltage-sampling circuit of servo system converting voltage into frequency
  • Direct current (DC) bus voltage-sampling circuit of servo system converting voltage into frequency

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Embodiment Construction

[0027] refer to Figure 1-3 , the servo system DC bus voltage sampling circuit using voltage to frequency conversion, including a resistance sampling voltage divider circuit 1, a V / F conversion circuit 2, and an isolated optocoupler circuit 3, the resistance sampling voltage divider circuit 1 is connected to the DC bus to obtain an input Voltage V in , by dividing the voltage so that V in When the bus is full voltage, it is about 10v;

[0028] The input terminal of the V / F conversion circuit 2 is connected with the resistance sampling voltage divider circuit 1, and the input voltage value is converted into a pulse frequency signal whose frequency and voltage are proportional;

[0029] The primary positive terminal of the isolated optocoupler circuit 3 is connected to the output end of the V / F conversion circuit 2, the secondary of the isolated optocoupler circuit 3 is connected to the I / O of the DSP, and the pulse signal of the same frequency is input into the DSP Get the c...

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Abstract

The invention relates to a direct current (DC) bus voltage-sampling circuit of a servo system converting a voltage to a frequency, comprising a resistance-sampling divider circuit, a V / F converting circuit and an isolation optocoupler circuit. The resistance-sampling divider circuit is connected with a DC bus to acquire an input voltage Vin which is about 10V on the bus by voltage division when the bus is in full voltage; the input end of the V / F converting circuit is connected with the resistance-sampling divider circuit and converts an input voltage value into a pulse frequency signal in a direct frequency and voltage proportion; the primary positive end of the isolation optocoupler circuit is connected with the output end of the V / F converting circuit; the secondary end of the isolation optocoupler circuit is connected with the I / O of a DSP; and pulse signals with the same frequency are input to the DSP to acquire corresponding digital quantities. The invention has the advantages of good input / output linearity and high reliability and accuracy.

Description

technical field [0001] The invention relates to a DC bus voltage sampling circuit of a servo system. Background technique [0002] On the servo system at present, the bus voltage sampling circuit of prior art (referring to figure 1 ) is mainly composed of a sampling voltage dividing resistor, a balancing resistor, a linear optocoupler, an operational amplifier circuit, and an analog-to-digital conversion circuit; the positive terminal of the linear optocoupler is connected to the sampling voltage dividing resistor, and the negative terminal of the linear optocoupler is connected to the balancing resistor , the secondary of the linear optocoupler is connected to the input terminal of the operational amplifier circuit; the output terminal of the analog-to-digital conversion circuit is connected to the control circuit, and the output digital signal is transmitted to the control circuit, so that the control circuit can detect the voltage change on the DC bus. [0003] The circu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R19/25G01R15/22
Inventor 覃海涛邵玉震吕晓东何恰
Owner HANGZHOU RIDING CONTROL TECH
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