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Hybrid primary-side tap-controllable balun

A balun and hybrid technology, applied in the direction of variable inductors, variable transformers, transformers, etc., can solve the problems of commutation overlap, small load adaptation range, low efficiency, etc., to reduce harmonic content and system The effect of energy loss

Active Publication Date: 2019-12-10
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the problems of high system complexity, low efficiency, small load adaptation range and commutation overlap existing in the existing method for increasing the pulse number of the rectifier, further increase the pulse number of the rectifier, and reduce the harmonic content of the input current to reduce pollution to the grid

Method used

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specific Embodiment approach 1

[0042] Specific implementation mode one: refer to figure 1 This embodiment is described in detail. The hybrid primary side three-tap controllable balun described in this embodiment includes a balanced reactor (1), a hybrid primary side tap controllable circuit (2), a single-phase full bridge Uncontrolled rectification circuit (3),

[0043] The primary side coil of the balance reactor (1) has three taps, and the three tap points are respectively P point, O point and Q point, and the O point is the center of the primary side coil, and the two taps of the P point and the Q point are connected with O The point is set symmetrically to the center,

[0044] The three-phase voltage input terminal of the power grid is connected to the AC input terminal of the rectification module 1 (4) and the AC input terminal of the rectification module 2 (5) after passing through the phase-shifting transformer,

[0045] One end of the primary coil of the balance reactor (1) is connected to point A...

specific Embodiment approach 2

[0052] Specific embodiment 2: This embodiment is a further description of the hybrid primary-side three-tap controllable balun described in specific embodiment 1. In this embodiment, the single-phase full-bridge uncontrolled rectifier circuit (3) includes Diode D 21 , Diode D 22 , Diode D 23 and diode D 24 ,

[0053] One end of the secondary coil of the balance reactor (1) is connected to the diode D at the same time 21 anode and diode D 22 the cathode,

[0054] Diode D 21 the cathode and diode D 23 After the negative poles are connected, it is used as the output positive terminal of the single-phase full-bridge uncontrolled rectifier circuit (3);

[0055] The other end of the secondary coil of the balance reactor (1) is connected to the diode D at the same time 23 anode and diode D 24 the cathode,

[0056] Diode D 22 anode and diode D 24 After the anodes are connected, it is used as the output negative terminal of the single-phase full-bridge uncontrolled rectifi...

specific Embodiment approach 3

[0057] Embodiment 3: This embodiment is to further explain the hybrid primary-side three-tap controllable balun described in Embodiment 1. In this embodiment, the rectification module 1 (4) and the rectification module 2 (5 ) are three-phase half-bridge rectifiers, three-phase full-bridge rectifiers, a rectifier group composed of multiple three-phase half-bridge rectifiers or a rectifier group composed of three-phase full-bridge rectifiers.

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Abstract

The invention belongs to the technical field of electric power and electronics. A primary coil of the hybrid primary-side tap controllable balance converter is connected with two points: an output anode end A of a rectification module 1 and an output anode end B of a rectification module 2. 3, 4 to n tags can be disposed. Tap points lead an uncontrolled diode or the uncontrolled diode and a fully-controlled switch tube are connected in series to be connected to an anode end M point of a load, and a hybrid primary-side tap controllable circuit is formed. An output end of a secondary coil is connected with a single-phase full-bridge uncontrolled rectification circuit, an output anode end of the single-phase full-bridge uncontrolled rectification circuit is connected with the anode end M point of the load, and an output cathode end is connected with a cathode end N point of the load. The fully-control switch tube and the uncontrolled diode are introduced into a balance reactor, so a step number of an input current of a system is increased to 48, 60 or even more, a harmonic wave content of the input current is greatly reduced, and pollution on a power grid is reduced. The hybrid primary-side tap controllable balance converter has the advantages of simple structure and control, high efficiency and reliability and the like, and is suitable for various rectification devices.

Description

technical field [0001] The invention relates to a hybrid primary-side tap-controllable balanced converter. It belongs to the technical field of power electronics. Background technique [0002] The high-power rectification system with balanced reactor is widely used in motor speed regulation, electrochemical processing, communication system power supply, ship and aircraft system due to its advantages of simple structure, strong overload capacity, high efficiency and reliability. However, the nonlinearity and time-varying nature of the rectifier itself have brought serious harmonic pollution to the power grid. By increasing the pulse number of the rectifier, the input current harmonics at the grid side can be suppressed and the pollution to the grid can be reduced. At present, there are mainly three methods to increase the pulse number of the rectifier: the first is to increase the phase-shifting transformer or phase-shifting winding, and multiple connections are made to the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M3/335H02M1/12H01F29/02H02M7/02
CPCH01F29/02H02M1/12H02M3/33569H02M7/02
Inventor 杨世彦王鹏廉玉欣祖光鑫杨威
Owner HARBIN INST OF TECH
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