Practical training examination device for SPWM variable-frequency speed regulation system

A technology of variable frequency speed regulation and practical training, which is applied in the direction of educational appliances, instruments, teaching models, etc., can solve problems such as large learning obstacles, and achieve the effect of improving overall analysis and professional skills

Inactive Publication Date: 2021-02-05
NANJING POLYTECHNIC INSITUTE
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For the more important aspects of system debugging, waveform observation and actual fault analysis in SPWM frequency conversion speed regulation, almost all the training devices are not involved, which makes students have relatively large learning obstacles in SPWM frequency conversion speed regulation

Method used

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  • Practical training examination device for SPWM variable-frequency speed regulation system

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Embodiment Construction

[0009] Below in conjunction with accompanying drawing and embodiment the present invention is specifically introduced as follows:

[0010] A training and assessment device for SPWM frequency conversion speed regulation system, which has a square box, including SPWM frequency conversion speed regulation circuit (1), auxiliary circuit (2) and transparent panel (3), characterized in that: the SPWM frequency conversion speed regulation The circuit (1) is located at the bottom of the box, including input EMI (01), input rectification (02), input filter (03), single-phase bridge inverter circuit (04), ICL8038 and LM311 control circuit (05), M57962L driver circuit (06), CD4013 protection circuit (07), the ICL8038 and LM311 control circuit (05) includes SPWM1 and SPWM2 waveform outputs, and the CD4013 protection circuit (07) includes a CD4013 double D flip-flop with a Q output terminal, so The transparent panel (3) is located around and on the upper part, including power switch, fault...

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PUM

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Abstract

The invention discloses a practical training examination device for a SPWM variable-frequency speed regulation system. The device is provided with a square box body which comprises an SPWM variable-frequency speed regulation circuit (1), an auxiliary circuit (2) and transparent panels (3), and is characterized in that the SPWM variable-frequency speed regulation circuit (1) is positioned at the bottom of the box body; the transparent panels (3) are positioned at the periphery and the upper part, and comprise a power switch, a fault operation switch, an 'input power circuit working state indication' lamp, a 'single-phase bridge type inverter circuit state indication' lamp, an 'inverter output' test hole, a 'direct-current voltage' test hole, an 'SPWM1' test hole, an 'SPWM2' test hole and a'protection circuit' test hole; and the auxiliary circuit (2) is positioned at the bottom and comprises a relay, wherein the SPWM variable-frequency speed regulation circuit (1) and the auxiliary circuit (2) and the SPWM variable-frequency speed regulation circuit (1) and the transparent panels (3)are in electrical circuit connection through wires; and fault points K1-K5 are arranged in the SPWM variable-frequency speed regulation circuit (1), and the fault points are connected with the fault operation switch on the box panel through the relay of the auxiliary circuit.

Description

technical field [0001] The invention relates to a practical training assessment device for frequency conversion speed regulation, in particular to a practical training assessment device for SPWM frequency conversion speed regulation system. Background technique [0002] SPWM frequency conversion speed regulation is an important aspect of the application of power electronics technology. In traditional vocational education, the experimental training related to SPWM frequency conversion and speed regulation uses the training device made by the teaching instrument manufacturer. For the more important aspects of system debugging, waveform observation and actual fault analysis in SPWM frequency conversion speed regulation, almost all the training devices are not involved, which makes students have relatively large learning obstacles in SPWM frequency conversion speed regulation. [0003] Therefore, there is an urgent need to develop a SPWM frequency conversion speed control syste...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09B23/18
CPCG09B23/18G09B23/183
Inventor 陈柬严金云
Owner NANJING POLYTECHNIC INSITUTE
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