Universal pulse width modulation integrated circuit for power electric current transormer

A technology of pulse width modulation and integrated circuit, applied in the direction of converting irreversible AC power input into DC power output, etc., to achieve the effects of fast speed, simple design, improved stability and reliability

Inactive Publication Date: 2008-02-06
TSINGHUA UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Furthermore, current converter topologies tend to be diversified. For example, for N-level single-phase bridge cascaded converters, due to the need to balance the utilization of each switching device and the DC capacitor voltage of each level, it is often not suitable Instead of using the N-level space vector method to directly control the control, it is decomposed into multiple low-level (2-level or 3-level) converters and then pulses based on the carrier phase shift method control

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  • Universal pulse width modulation integrated circuit for power electric current transormer
  • Universal pulse width modulation integrated circuit for power electric current transormer
  • Universal pulse width modulation integrated circuit for power electric current transormer

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Embodiment Construction

[0033]The universal pulse width modulation integrated circuit for power electronic converters proposed by the present invention has a schematic block diagram as shown in Figure 1, including: three modulation ratio registers for storing three-phase reference pulse width modulation ratio setting values; three A phase shift angle register is used to store the three-phase reference PWM phase shift angle setting value; a fundamental frequency register is used to store the reference PWM fundamental frequency setting value; a switching frequency register is used to store the pulse width Modulation sampling switching frequency setting value; a level number register, used to store the pulse width modulation level number setting value; a cascade number register, used to store the pulse width modulation cascading number setting value; a zero sequence injection flag bit register , used to store the pulse width modulation zero-sequence injection flag; a data interface circuit, used for exte...

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Abstract

An universal pulse width modulation integrated circuit for electronic current transformer of electric power consists of a set of parameter setting registers , a data interface circuit , a digital tracking circuit of three phase synchronous phase angle , a clock frequency division circuit for sampling , a triggering signal generation circuit for sampling , a calculation circuit of reference voltage , a data format switching circuit of reference voltage , a pulse width modulation calculating circuit , K numbers of the same switch state output time sequence control circuit and K numbers of the same switch state switching circuit .

Description

technical field [0001] The present invention relates to a general pulse width modulation integrated circuit for power electronic converters, so as to realize the general pulse width modulation (hereinafter referred to as PWM) control of multilevel converters with various levels and numbers, and at the same time be able to The invention relates to a carrier phase-shifting PWM control mode of various stages, and belongs to the technical field of pulse control of power electronic converters and the technical field of application-specific integrated circuits. Background technique [0002] The role of power electronic converters in industrial systems is becoming more and more important, and they have shown great advantages and irreplaceable roles in the fields of power transmission and distribution, electric drive and speed regulation, and new energy utilization. With the continuous development of power electronics technology, the topology of the converter has developed from the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M7/04H02M7/12
Inventor 宋强刘文华
Owner TSINGHUA UNIV
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