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Current pulse falling edge linear adjustable control method and device having rising edge lifting capacity

A current pulse, linear technology, applied in the field of control and device with linearly adjustable falling edge of current pulse with rising edge boosting capability, can solve the problem of longer time for current to reach steady state, poor linearity, affecting current pulse frequency, etc. question

Active Publication Date: 2005-06-01
CHONGQING CUILU DETECTION TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In many cases, the load of the current pulse device is an inductive load, especially when the load is a large inductance load such as a coil, which seriously affects the shape of the current pulse. The current pulse is not an ideal pulse waveform. There is a certain delay time, and the linearity of the current falling edge is poor
The current pulse device is used as a signal source. It is a difficult point in power electronics technology to simultaneously solve the problems of adjustable falling delay time of the current pulse, linearity of the falling edge, and steepness of the rising edge. The delay of the rising edge and the falling edge makes the current reach The time of steady state becomes longer, which affects the increase of current pulse frequency

Method used

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  • Current pulse falling edge linear adjustable control method and device having rising edge lifting capacity
  • Current pulse falling edge linear adjustable control method and device having rising edge lifting capacity
  • Current pulse falling edge linear adjustable control method and device having rising edge lifting capacity

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Embodiment Construction

[0081] The specific control method of the present invention is:

[0082] 1. Close switch K, adjust the frequency of "bipolar current pulse control circuit" to 12.5Hz;

[0083] 2. Adjust the voltage V of the DC power supply 1 =38V, the output current pulse amplitude is 57A, and the maximum current passed by the fully controlled electronic switch selected is 100A;

[0084] 3. Output periodic load voltage waveform V o (t) is:

[0085] t 0 : V o =V 2 , V 1 2 3 , The figure is V o =550V;

[0086] t 1 : V o =38V;

[0087] t 2 : V o Reduce from 38V to -600V;

[0088] t 3 : V o Rise from -600V to 0V;

[0089] t 4 : V o Reduce from 0V to -550V;

[0090] t 5 : V o =-38V;

[0091] t 6 : V o Increase from -38V to 600V;

[0092] t 7 : V o Decrease from 600V to 0V;

[0093] Control voltage and current pulse during the rising and falling of forward current pulse:

[0094] At t 0 ~t 1 During the period, the voltage V provided to the load o (t) initial value V o (t 0 )=V 2 =550V, the current pulse...

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Abstract

The present invention is current pulse controlling method and device with rise edge raising capacity and fall edge linearity regulating capacity and current pulse generating method and device, and is especially suitable for the condition with great inductance load in geophysical exploration, engineering geological exploration and other fields. The method of the present invention includes: regulating frequency, regulating the voltage of DC power supply and clamping voltage source to generate voltage waveform with the same shape and amplitude, calculating the fall slope of the positive and negative current pulses and the fall delay time of the output current pulse. The device of the present invention includes DC power source, power switch, bipolar current pulse generator and its control circuit, inductive load, rise edge raising circuit, clamping circuit and clamping voltage source.

Description

Technical field: [0001] The invention relates to a current pulse generation method and device, and is particularly suitable for a current pulse generation method and device when a load has a large inductance, and is suitable for fields such as geophysical prospecting and engineering geological prospecting. Background technique: [0002] In some research and industrial applications, it is necessary to use positive current pulses, negative current pulses or bipolar current pulses. The standard waveform of the bipolar current pulse is characterized by constant amplitude during the output current period, zero current during the non-output period, and the current waveform periodically changes. [0003] A device that generates current pulses can generate positive, negative or bipolar current pulses with adjustable pulse period and amplitude. The circuit that generates bipolar current pulses is realized by a full bridge circuit, and the four bridge arm switches use fully controlled powe...

Claims

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Application Information

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IPC IPC(8): G01V3/00H03K3/01H03K3/012H03K3/017
Inventor 周雒维付志红苏向丰罗强
Owner CHONGQING CUILU DETECTION TECH CO LTD
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