Pulse-width modulation (PWM) phase-shifting control device for bi-directional direct current (DC)-DC converter

A control device and phase-shift control technology, which are applied in output power conversion devices, control/regulation systems, and DC power input conversion to DC power output, etc. Simplicity, the effect of reducing switching losses and noise

Inactive Publication Date: 2012-07-18
CHINA ELECTRIC POWER RES INST +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

If it is implemented by connecting two DC-DC convert...

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  • Pulse-width modulation (PWM) phase-shifting control device for bi-directional direct current (DC)-DC converter
  • Pulse-width modulation (PWM) phase-shifting control device for bi-directional direct current (DC)-DC converter
  • Pulse-width modulation (PWM) phase-shifting control device for bi-directional direct current (DC)-DC converter

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Embodiment Construction

[0020] Such as figure 1 Shown is the main circuit topology of the three-phase bidirectional DC / DC inverter. Among them, the V1 side is the DC bus side, and the V2 side is the battery side. The circuit adopts BUCK-BOOST buck-boost parallel circuit, that is, there are three sets of switching devices: S1 / S2, S3 / S4, S5 / S6, and each group of switching devices can realize voltage rise and fall control. When only the upper and lower tubes on the same bridge arm work, assuming that the IGBT tube S1 is in the closed state, the switch tube S2 on the same bridge arm should be in the off state, and the other two groups of IGBT tubes should also be in the off state , which is equivalent to the step-down process of the BUCK circuit, which realizes the charging process of electric energy from the grid side to the battery; on the contrary, when S1 is turned off and S2 is closed, the other two groups are still in the off state, which is equivalent to the BOOST circuit , that is, the battery ...

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Abstract

The invention provides a PWM phase-shifting control device for a bi-directional DC-DC converter. The control device comprises a dead time control unit, a PWM phase-shifting control circuit and a bi-directional DC-DC converter which are sequentially connected. According to the PWM phase-shifting control device for the bi-directional DC-DC converter, the PWM phase-shifting control technology is adopted to enable a control strategy to be simple and easy to achieve. For multi-PWM control technology, drive signals of each unit circuit need to be staggered with each other to guarantee smooth conversion between Insulated Gate Bipolar Translators (IGBT), therefore switching frequency can be decreased, and switching loss can be reduced.

Description

technical field [0001] The invention belongs to the field of power system energy storage converters, and in particular relates to a PWM phase-shift control device for a bidirectional DC / DC converter. Background technique [0002] In some applications such as electric vehicles, aerospace power supply systems, new energy and renewable energy power generation, both sides are DC voltage sources or DC active loads, and their voltage polarity remains unchanged. It is hoped that energy will flow in both directions, that is, the current two-way flow. If it is implemented by connecting two DC-DC converters in anti-parallel, the circuit design will be complicated. Therefore, a bidirectional DC-DC converter is required to realize corresponding functions. [0003] Bidirectional DC / DC converter is a particularly important research field in power electronics. It is mainly used in solar cell arrays, uninterruptible power supply systems (UPS), fuel cell power systems, multi-port hybrid p...

Claims

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Application Information

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IPC IPC(8): H02M3/155
Inventor 闫雪生惠东闫涛李俊霖渠展展
Owner CHINA ELECTRIC POWER RES INST
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