Method for Predicting Final Voltage of Charging and Discharging in RC Circuit
A final voltage and prediction method technology, applied in the direction of measuring current/voltage, measuring devices, measuring electrical variables, etc., can solve the problems that are not easy to determine, when to start charging and discharging, and can not quickly calculate Ue, etc., to achieve extended waiting the effect of time
Active Publication Date: 2015-10-07
DELTA GREENTECH CHINA CO LTD
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Problems solved by technology
Among them, Ut is easy to collect, but it may not be possible to determine when to start charging and discharging, Uo and t are not easy to determine; if RC is unknown or is a variable in different applications, directly using this formula (1) can not quickly calculate Ue
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[0021] Embodiments of the present invention are described below through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific implementation modes, and various modifications or changes can be made to the details in this specification based on different viewpoints and applications without departing from the spirit of the present invention.
[0022] see figure 1 , is a flow chart showing the operation of the method for predicting the final charging and discharging voltage of the RC circuit of the present invention. the following to figure 2 A schematic diagram of a circuit (where, such as figure 2 As shown, the capacitances Cx and Cy shown in the figure are the capacitances of the voltage to be measured, and the following takes the voltage capacitance Cx to be measured...
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The invention provides a prediction method of final charge-discharge voltage of an RC circuit. The method mainly comprises the steps as follows: when a capacitor in the RC circuit starts to be in charge or discharge state, voltage values at two ends of a to-be-detected capacitor are quickly collected for three times at different moments but in equal preset time intervals, and the voltage values are marked as a first collected voltage value, a second collected voltage value and a third collected voltage value; then, whether the collected second collected voltage value is equal to the third collected voltage value is judged, if yes, the final voltage value of the to-be-detected capacitor is determined to be equal to the second collected voltage value or the third collected voltage value; or otherwise, the final voltage value of the to-be-detected capacitor is computed and obtained according to the first collected voltage value, the second collected voltage value and the third collected voltage n value as well as a set rule. Therefore, the influence of excessive uncertain factors such as an RC time constant, an initial voltage value on the capacitor during charging and discharging and the like can be avoided, and the final charge-discharge voltage value of the capacitor can be obtained quickly and accurately.
Description
technical field [0001] The invention relates to a method for predicting the final charging and discharging voltage of an RC circuit, in particular to a method for predicting the final charging and discharging voltage of an RC circuit that can quickly and prepare to obtain the final voltage value that can be charged and discharged into a capacitor. Background technique [0002] In systems such as DC power supply systems for power and communication, Internet data processing center (IDC) DC power supply systems, electric vehicle charging systems, and smart meters, it is necessary to quickly generate alarms or controls based on the final voltage value, and the initial voltage of the capacitor is not clear. , and under the premise that the RC time constant is large and unknown, how to quickly measure the final charging and discharging voltage of the RC circuit has always been the goal that the industry is constantly seeking. [0003] If the voltage measurement circuit is used to ...
Claims
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IPC IPC(8): G01R19/00
Inventor 董玉兵张永陈原
Owner DELTA GREENTECH CHINA CO LTD