Permanent magnetic coil driving circuit

A coil drive and drive circuit technology, applied in electrical components, electronic switches, pulse technology, etc., can solve the problems of multi-port resources, occupation, H-bridge burnout, etc., and achieve the effects of saving port resources, preventing overload, and avoiding burnout

Active Publication Date: 2014-08-20
常州电子研究所有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The driving mode of the existing electromagnetic coil is realized by using the single-chip circuit to control the H bridge circuit formed by the triode. The single-chip microcomputer controls the two high-end switch tubes and the low-side switch tubes that form the H bridge to conduct in turn through four ports. , this way takes up more port resources, if there is an error in programming, if there is a level at which the two pairs of switches are turned on at the same time, the H bridge will be burned; so how to provide two input terminals It can control the two pairs of high-end and low-end switch tubes to turn on in turn, and when the level that makes the switch tubes turn on appears at the two input terminals at the same time, any pair of tubes can be randomly turned on to avoid the H bridge burning Bad drive circuit is a technical problem in this field

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] See figure 1 , 2 , a permanent magnet coil drive circuit, comprising: an H-bridge composed of a first low-end switch tube Q1, a second low-end switch tube Q2, a first high-side switch tube Q3, and a second high-side switch tube Q4, wherein the first A low-side switch tube Q1 and a second high-end switch tube Q4 are paired tubes for the first group of control coils L1 to be energized, and the second low-side switch tube Q2 and the first high-side switch tube Q3 are for the second group to control the coil L1. Electric pair tubes, each high-end switch tube is connected to the corresponding high-end drive circuit, and each low-end switch tube is connected to the corresponding low-end drive circuit;

[0045] It also includes: respectively controlling the first and second groups of tube control circuits with the same structure; the first pair of tube control circuits 1 and the second group of tube control circuits 2 both include : Comparator, control circuit, comparison le...

Embodiment 2

[0069] See image 3 , image 3The specific circuit implementation and principle of the switch tube drive circuit are shown; for the sake of simplicity, the same or similar components use the same or similar labels; in this implementation, the comparator uses a dual comparator integrated circuit, so the first The label of the first comparator is changed to U1B, and the label of the second comparator is changed to U1A.

[0070] On the basis of Embodiment 1, the switching tube can be replaced by a MOS tube, and the driving principle of the H bridge is as follows:

[0071] This circuit fully considers the driving reliability of the H bridge, and completely avoids the direct connection of the upper and lower bridge arms during the circuit design. The specific truth table is shown in Table 1:

[0072] Table 1 Driving truth table of H bridge

[0073]

[0074] The working principle of the circuit is as follows: the circuit is mainly composed of two comparators, four optocouplers...

Embodiment 3

[0083] See Figure 1-5 , on the basis of embodiment 1, a kind of working method of permanent magnet coil drive circuit, comprises:

[0084] ① The permanent magnet coupling and permanent magnet sub-control signals output by the processor are respectively connected to the non-inverting terminals of the first comparator 101 and the second comparator 201; wherein the high level of the permanent magnet coupling and permanent magnet sub-control signals is 5V, The low level is 0V; the power supply voltage of the first comparator 101 and the second comparator 201 is 5-20V, generally 13V; the power supply of the comparison level circuit is also 13V;

[0085]② If the permanent magnet coupling control signal is high level, and the permanent magnet sub-control signal is low level, then the voltage at the non-inverting terminal of the first comparator 101 is higher than the voltage at the inverting terminal, and the first comparator 101 outputs a high level to control the first low-side d...

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Abstract

The invention relates to a permanent magnetic coil driving circuit which comprises an H electrical bridge and first and second group pair tube control circuits, wherein the H electrical bridge is formed by first and second low-end switching tubes and first and second high-end switching tubes; the first low-end switching tube and the second high-end switching tube are a first group of pair tubes for controlling to power up a coil; the second low-end switching tube and the first high-end switching tube are a second group of pair tubes for controlling to power up the coil; each high-end switching tube is connected with a corresponding high-end driving circuit; each low-end switching tube is connected with a corresponding low-end driving circuit; the first and second group pair tube control circuits are of the same structure and are respectively used for controlling the first and second group of pair tubes; and the first and second group pair tube control circuits comprise comparators, control circuits and comparison level circuits. According to the invention, two groups of pair tube circuits can be controlled to be alternately conducted by two comparators, and thus, a control port of the permanent magnetic coil driving circuit also only requires two permanent magnetic switching-on devices and two permanent magnetic switching-off devices and port resources are saved.

Description

technical field [0001] The invention relates to a permanent magnet coil drive circuit. Background technique [0002] The driving mode of the existing electromagnetic coil is realized by using the single-chip circuit to control the H bridge circuit formed by the triode. The single-chip microcomputer controls the two high-end switch tubes and the low-side switch tubes that form the H bridge to conduct in turn through four ports. , this way takes up more port resources, if there is an error in programming, if there is a level at which the two pairs of switches are turned on at the same time, the H bridge will be burned; so how to provide two input terminals It can control the two pairs of high-end and low-end switch tubes to turn on in turn, and when the level that makes the switch tubes turn on appears at the two input terminals at the same time, any pair of tubes can be randomly turned on to avoid the H bridge burning A bad drive circuit is a technical problem in this field....

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H03K17/08
Inventor 王全忠
Owner 常州电子研究所有限公司
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