On-load voltage regulation control circuit for roadway illumination control and control method thereof

Abstract

The invention discloses an on-load voltage regulation control circuit for roadway illumination control and a control method thereof. The on-load voltage regulation control circuit comprises a winding, an AC connecting end and a load. The AC connecting end is provided with an L end and an N end. The winding is provided with a secondary coil and a plurality of primary coils. The secondary coil N1 is provided with a tap A1 and a tap A2, the tap A1 is connected with the L end, and the two ends of the load are connected with the tap A2 and the N end respectively. Taps of the primary coils are respectively connected with the N end through an on-off control circuit. The on-off control circuit is a combinational circuit including a plurality of switches, the number of the connected primary coils and the series-parallel connection structure can be selected through the on-off control circuit, and thus the voltage regulating size and precision can be changed. According to the on-load voltage regulation control circuit, the four different operation working conditions of normal voltage, boosting, voltage reduction and parallel connection can be achieved, the size is greatly decreased, the cost is greatly lowered, the discontinuous power supply problem can be solved, and the power supply reliability is improved.

Description

technical field [0001] The invention relates to the technical field of circuit voltage transformation, in particular to an on-load voltage regulation control circuit for road lighting control and a control method thereof. Background technique [0002] Traditional transformers are mainly divided into two categories: isolation transformers and autotransformers. [0003] The primary coil and secondary coil of the isolation transformer are wound separately. Although they are installed on the same iron core, they are insulated from each other. The primary coil and the secondary coil have only magnetic coupling and no electrical connection. However, since the power absorbed by the primary coil of the transformer from the power supply is all transmitted to the load by the electromagnetic induction between the two coils, when the transformer capacity is the same, the isolation transformer consumes a lot of materials, is large in size and high in cost, but its The on-load voltage re...

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Problems solved by technology

[0006] In order to solve the problems of using autotransformer for voltage regulation in road lighting control, the continuity of power supply cannot be guaranteed, and the use of isolation transformer for voltage regulation is large in size and cost, which is not conducive to production and installation. A road lighting control system is proposed. The on-load voltage regulation control circuit and its control method, the load power transmission is mainly borne by the circuit directly, which can realize four different operating states of normal pressure, boost, step-down, and parallel connection, and the volume and cost are greatly reduced. There is a problem of discontinuous power supply, and the reliability of power supply is improved

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