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Silicon controlled intermediate frequency power supply circuit

An intermediate frequency power supply and circuit technology, applied in the field of power supply, can solve the problems of low startup success rate, complex circuit structure and high cost, and achieve the effects of high startup success rate and simple circuit structure

Inactive Publication Date: 2014-03-26
WONH IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention mainly solves the problems of complicated circuit structure, high cost and low start-up success rate in the pre-charging and pre-magnetization start-up mode of the intermediate frequency power supply in the prior art, and provides a silicon controlled rectifier with simple structure and high start-up success rate. Intermediate frequency power supply circuit

Method used

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  • Silicon controlled intermediate frequency power supply circuit
  • Silicon controlled intermediate frequency power supply circuit
  • Silicon controlled intermediate frequency power supply circuit

Examples

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Embodiment

[0020] In this embodiment, a thyristor intermediate frequency power supply circuit includes a main circuit and a start-up trigger circuit, the main circuit includes a single-phase inverter bridge composed of four thyristors, and the start-up trigger circuit includes a start-up circuit and an inverter trigger circuit, The starting circuit is connected with the inverter trigger circuit, and the inverter trigger circuit is connected with the thyristor control terminal of the single-phase inverter.

[0021] The main circuit circuit structure is as figure 1 As shown, it includes a three-phase bridge fully controlled rectifier circuit and a single-phase inverter bridge circuit. The three-phase power is connected to the three-phase bridge fully controlled rectifier circuit, and the unidirectional inverter bridge is connected to the three-phase bridge fully controlled rectifier circuit. , the unidirectional inverter bridge circuit is composed of four thyristors, and the unidirectional...

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Abstract

The invention relates to a silicon controlled intermediate frequency power supply circuit. Problems in the prior art that an intermediate frequency power supply adopts a pre-charging and pre-magnetizing starting mode and thus is complex in circuit structure, high in cost and low in starting success rate are solved. The power supply circuit comprises a main circuit and a starting trigger circuit. The main circuit comprises a single-phase inverter bridge which is formed by four silicone controlled rectifiers. The starting trigger circuit comprises a starting circuit and an inverter trigger circuit. The starting circuit is connected with the inverter trigger circuit which is connected onto the control ends of the silicone controlled rectifiers of the single-phase inverter. Advantages of the invention are that the inverter trigger circuit formed by phase-locked loops is adopted, and a sweep-frequency type zero voltage starting mode is adopted so that the circuit structure is simple and the starting success rate is higher.

Description

technical field [0001] The invention relates to a power supply, in particular to a thyristor intermediate frequency power supply circuit with simple structure and high start-up success rate. Background technique [0002] With the development of industry, the application of intermediate frequency power supply is becoming more and more extensive, and its working mode mostly adopts parallel inverter structure. [0003] Its working principle is: use a three-phase bridge-type fully-controlled rectifier circuit to rectify the alternating current into direct current, and become a constant direct current source after being smoothed by the reactor, and then pass through the single-phase inverter bridge to invert the direct current into an empty frequency Single phase medium frequency current. The load consists of an induction coil and a compensating capacitor connected to a parallel resonant circuit. [0004] The difficulty of the thyristor intermediate frequency power supply is to...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M5/45H02M1/36
Inventor 蔡幼清
Owner WONH IND
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