Digital alternating constant-current apparatus

Abstract

The present invention discloses a digital alternating constant current device, which comprises a thyristor AC voltage-adjusting module, a transformer, a load, a current true effective value detector, an AD converter, a controller and a DA converter. The device is characterized in that the input end of the thyristor AC voltage-adjusting module is connected with an electric network, and the output end is connected with the transformer; the output end of the transformer is connected with the load and the current true effective value sensor; the current true effective value sensor is used for detecting the alternating current signals on the load, and detecting and calculating the true effective value of the actually detected alternating current signals so as to form feedback signals. The device not only improves the accuracy of current control and solves the difficulty of large-current and high-voltage constant current design, but also avoids the problems of insufficient voltage resistance and large heating amount of the high-power tube, and thus greatly reducing the cost of the system.

Description

Technical field [0001] The invention relates to a digital power supply device, in particular to a digital alternating constant current device. Background technique [0002] As a power supply design technology, constant current drive is widely used in various electronic appliances and industrial control. Based on different electrical equipment and usage conditions, the realization method of constant current drive is also different. The most commonly used is DC constant current drive. The implementation methods include linear constant current drive and switching constant current drive. The main difference between the two is the difference in working efficiency, the latter is more efficient. When the load power is large (reflected in the required working voltage is high, such as kilovolts or more, or the current is large, such as tens of amperes or more), the DC constant current drive is often difficult to meet the actual use requirements due to the limitation of the circuit itself....

AI Technical Summary

Problems solved by technology

[0003] The present invention provides a digital alternating constant current device, the purpose of which is to improve the accuracy of current control and solve the problem of large current and high voltage constant current by detecting and calculating the true effective value of the actual alternating current as a feedback signal Flow design problems, avoiding the problems of insufficient withstand voltage and high heat generation of high-power tubes, greatly reducing system costs

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