Wide-range and closed-loop control alternating current source and processing method
A closed-loop control, AC current technology, applied in the field of electronics, can solve the problems of constant current source AC current source research, limited design, etc., to achieve the effect of switchable range, simple circuit, stable and controllable performance
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Embodiment 1
[0024] This embodiment discloses an AC current source with a wide range and closed-loop control, including:
[0025] The V / I conversion circuit is used to convert the AC input voltage into an AC current output, and the input voltage is a variable one controlled by a closed-loop control loop to realize an adjustable range; and the V / I conversion circuit is also equipped with at least Two resistors are connected in parallel to change the total resistance value of the parallel resistors through on-off combination to form variable 2 with adjustable range; the output current of the V / I conversion circuit is linear with the quotient of variable 1 and variable 2 transform;
[0026] A sampling resistor connected in series between the V / I conversion circuit and the load;
[0027] The closed-loop control loop includes an analog-to-digital converter connected to the sampling resistor to realize the required feedback data acquisition, a digital-to-analog converter connected to the input ...
Embodiment 2
[0051] Corresponding to the above-mentioned embodiment 1, this embodiment discloses a wide-range and closed-loop control AC current source processing method, including the following steps:
[0052] Step S1, using the V / I conversion circuit to convert the AC input voltage into an AC current output, the input voltage is controlled by the closed-loop control loop to realize the variable one with adjustable range; and the V / I conversion circuit is also equipped with at least two Two resistors are connected in parallel to change the total resistance value of the parallel resistors through the on-off combination to form variable two with adjustable range; the output current of the V / I conversion circuit performs corresponding range switching with the change of the variable one and variable two, And the output current of the V / I conversion circuit is transformed linearly with the quotient of the first variable and the second variable.
[0053] Step S2, setting a sampling resistor bet...
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