Low-voltage and high-current reversing device based on H bridge

A commutation device and high current technology, applied in the direction of conversion equipment without intermediate conversion to AC, can solve the problems of slow commutation speed, relay switching noise, etc., achieve stable output, fast current commutation speed, and meet large The effect of the current path

Inactive Publication Date: 2013-11-27
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention aims to solve the problem that the existing current commutation circuit has a slow commutation speed when a large current is pas

Method used

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  • Low-voltage and high-current reversing device based on H bridge
  • Low-voltage and high-current reversing device based on H bridge

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0011] Specific implementation mode 1: the following combination figure 1 To explain this embodiment, the H-bridge-based low-voltage high-current commutation device in this embodiment includes a constant current source 1, an H-bridge conversion circuit 2, an upper computer 3, and a control circuit 4;

[0012] The positive pole of the constant current source 1 is connected to the positive pole of the H-bridge conversion circuit 2, the negative pole of the constant current source 1 is connected to the negative pole of the H-bridge conversion circuit 2, a signal output terminal of the H-bridge conversion circuit 2 is connected to one end of the load, and the H-bridge conversion The other signal output end of circuit 2 is connected to the other end of the load;

[0013] The signal output terminal of the host computer 3 is connected to the signal input terminal of the control circuit 4, and the signal output terminal of the control circuit 4 is connected to the control signal input termi...

Example Embodiment

[0014] Specific implementation manner 2: the following combination figure 2 To illustrate this embodiment, this embodiment further defines the H-bridge-based low-voltage and high-current commutation device described in the first embodiment. In this embodiment, the H-bridge conversion circuit 2 consists of a first solid state relay and a second solid state relay. , The third solid state relay and the fourth solid state relay;

[0015] The positive pole of the control power supply in the control circuit 4 is simultaneously connected to the positive pole of the first solid state relay control terminal, the positive pole of the second solid state relay control terminal, the positive pole of the third solid state relay control terminal and the positive pole of the fourth solid state relay control terminal, and the negative pole of the first solid state relay control terminal is connected The first H-bridge control signal output terminal of the control circuit 4, the negative terminal...

Example Embodiment

[0018] Specific embodiment 3: This embodiment is a further limitation of the H-bridge-based low-voltage and high-current commutation device described in specific embodiment 1. In this embodiment, the output current of the constant current source 1 is greater than 0 and less than 1000A, and the output The voltage is greater than 0 and less than 1.5V.

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Abstract

The invention discloses a low-voltage and high-current reversing device based on an H bridge, relates to the field of current reversing, and aims at solving the problems of an existing current reversing circuit that the reversing speed is not enough, and the relay conversion switch generates noise when the high current passes through. A positive electrode of a constant current source is connected with a positive electrode of an H bridge converting circuit, a negative electrode of the constant current source is connected with a negative electrode of the H bridge converting circuit, one signal output end of the H bridge converting circuit is connected with one end of a load, the other signal output end of the H bridge converting circuit is connected with the other end of the load, and the H bridge is built by a solid state relay. Compared with a common relay, according to the parameter of the solid state relay, the speed of the solid state relay is further higher than the speed of the relay, the noise is avoided when the switch is switched, and the solid state relay has no noise problem compared with the common relay. The saturation voltage drop of the H bridge is small, the current reversing speed is high, the reversing function is realized within 5ms, the absolute values before and after current reversing are constant, and the output is stable. The device is suitable for the field of current reversing.

Description

technical field [0001] The invention relates to a low-voltage and high-current commutation device based on an H bridge, and belongs to the field of current commutation. Background technique [0002] One of the main uses of the current current commutation technology is the DC commutation of the motor, and the commutator is mostly used. The commutator is the original part of the DC permanent magnet series motor in order to allow the motor to continue to rotate. The working principle of the commutator is to convert the alternating electromotive force induced in the armature coil into a DC electromotive force when it is drawn out from the brush end by the commutator and the commutation effect of the brush. Structurally, the commutator is a circle surrounded by several contact pieces, which are respectively connected to each tap on the rotor, and two electrodes connected to the outside are called brushes to contact it, and only two of them are in contact at the same time. The pr...

Claims

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Application Information

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IPC IPC(8): H02M3/16
Inventor 朱春波李有全魏国任晓峰程志远
Owner HARBIN INST OF TECH
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