Stabilized voltage supply

Abstract

The invention discloses a stabilized voltage supply, which comprises a single-phase matrix converter, an output circuit and a control circuit, wherein an input end of the single-phase matrix converter is externally connected with a power supply; an output end of the single-phase matrix converter is externally connected with a load through the output circuit; the input end and the output end of the control circuit are connected with the output end of the output circuit and the input end of the single-phase matrix converter respectively to form a feedback loop; the input end of the control circuit is also externally connected with the power supply; and the single-phase matrix converter carries out a conversion on input alternating current and then outputs the alternating current to an external load through the output circuit while the control circuit carries out sampling on the output end of the output circuit, and adjusts the instantaneous duty ratio of two groups of two-way switches in the single-phase matrix converter by a sampling signal and preset expected output voltage, so that stable and effective voltage is output. The stabilized voltage supply disclosed by the invention does not need a power frequency filtering device, so that the size of the device is reduced; the structure is relatively simple; and the cost is reduced.

Description

technical field [0001] The invention relates to the technical field of power electronics, in particular to a voltage-stabilized power supply. Background technique [0002] The stabilized power supply currently on the market has the following disadvantages: it is bulky and heavy due to the power frequency iron core or power frequency flat wave link; the voltage stabilizer response is slow; the circuit switched by the relay has the problems of sudden jump in voltage and discontinuous voltage regulation; Most voltage stabilizers can only stabilize the effective value of the voltage, and have no filter correction function. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a stabilized power supply, which can reduce the amount of real-time calculation, improve efficiency, reduce the volume and weight of the device, and reduce the cost. [0004] In order to solve the above technical problems, the present invention provi...

AI Technical Summary

Problems solved by technology

[0002] The stabilized power supply currently on the market has the following disadvantages: it is bulky and heavy due to the power frequency iron core or power frequency smoothing link; the voltage stabilizer responds slowly; the circuit switched by the relay has the problems of sudden jump in voltage and discontinuous voltage regulation; Most voltage stabilizers can only stabilize the effective value of the voltage, and have no filter correction function

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