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Power electronic switching circuit and its method for controlling and switching dead time

A technology of power electronic switch and dead time, which is applied to electronic switches, amplifiers with semiconductor devices/discharge tubes, electrical components, etc., and can solve problems such as difficult effects

Active Publication Date: 2011-06-08
豪威国际控股有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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  • Power electronic switching circuit and its method for controlling and switching dead time
  • Power electronic switching circuit and its method for controlling and switching dead time
  • Power electronic switching circuit and its method for controlling and switching dead time

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Embodiment Construction

[0017] Such as figure 1 As shown, a power electronic switching circuit includes a driving signal distribution circuit and a plurality of parallel power transistors connected thereto, and the driving signal distribution circuit includes a plurality of driving circuits for driving corresponding power transistors. The driving signal is a signal with a uniform delay when reaching each power transistor.

[0018] A method for controlling the dead time of switching power electronic switches, splitting the traditional total current transmission power switch into multiple power tubes with equal current, and each power tube for transmission current is controlled by the corresponding drive circuit driven by.

[0019] figure 1 Among them, the input and output signal waveforms of the driving signal distribution circuit (Driving Signal Distributor) are as follows figure 2 shown. from CP 1 / CN 1 、CP 2 / CN 2 ,...,CP n / CN n , drive corresponding power switches (Power MOSFET) 1, 2, ...

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Abstract

The present invention provides a power electronic switch circuit and the control shift method of the dead time. The power electronic switch circuit includes a driving signal distributed circuit and a plurality of parallel power transistors connected with the distributed circuit. The driving signal distributed circuit includes a plurality of driving circuits to drive the corresponding power transistors. The control shift method is that a power switch is divided uniformly into a plurality of power transistors, each of which is driven by the corresponding driving circuit. Delays remain uniform between each driving circuit. The present invention divides the dead time generated by the power electronic switch of the prior art and the effects caused into a plurality which are distributed in the dead time, causing the unideal effects generated by factors such as the gate capacitance and the load of the power transistor and current to be weakened and uniformized.

Description

technical field [0001] The invention belongs to the technical field of switching power supplies, and in particular relates to a power electronic switch and a method for controlling and switching the dead time thereof. Background technique [0002] The dead time of power electronic switches is a major factor affecting the efficiency and performance of power devices. In the commonly used switching power supply technology, too wide dead time will lead to the conduction of the parasitic diode of the power tube, thereby reducing the conversion efficiency; too narrow dead time will cause the power tube to be turned on simultaneously under certain conditions situation, so that a short-circuit current occurs inside the switching power converter. These will affect the conversion efficiency of the switching power supply circuit. In a class D power amplifier used for signal power amplification, the dead time will introduce distortion in the output signal. [0003] US2006 / 0012428A1 d...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H03K17/00H03F1/32H03K17/04H03F3/217
Inventor 许刚
Owner 豪威国际控股有限公司