CN112201129A - Voltage and current double-closed-loop direct current speed regulation system checking device - Google Patents

Voltage and current double-closed-loop direct current speed regulation system checking device Download PDF

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CN112201129A
CN112201129A CN202011337200.8A CN202011337200A CN112201129A CN 112201129 A CN112201129 A CN 112201129A CN 202011337200 A CN202011337200 A CN 202011337200A CN 112201129 A CN112201129 A CN 112201129A
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circuit
current
voltage
closed
fault
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陈柬
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Nanjing Polytechnic Institute
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Nanjing Polytechnic Institute
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    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09B—EDUCATIONAL OR DEMONSTRATION APPLIANCES; APPLIANCES FOR TEACHING, OR COMMUNICATING WITH, THE BLIND, DEAF OR MUTE; MODELS; PLANETARIA; GLOBES; MAPS; DIAGRAMS
    • G09B23/00—Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes
    • G09B23/06—Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes for physics
    • G09B23/18—Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes for physics for electricity or magnetism
    • G09B23/183—Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes for physics for electricity or magnetism for circuits
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09B—EDUCATIONAL OR DEMONSTRATION APPLIANCES; APPLIANCES FOR TEACHING, OR COMMUNICATING WITH, THE BLIND, DEAF OR MUTE; MODELS; PLANETARIA; GLOBES; MAPS; DIAGRAMS
    • G09B23/00—Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes
    • G09B23/06—Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes for physics
    • G09B23/18—Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes for physics for electricity or magnetism

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  • Theoretical Computer Science (AREA)
  • Control Of Eletrric Generators (AREA)
  • Tests Of Circuit Breakers, Generators, And Electric Motors (AREA)

Abstract

The invention discloses a voltage and current double-closed-loop direct current speed regulation system assessment device, which comprises a voltage and current double-closed-loop speed regulation circuit (I), a supplement circuit (II) and a fault debugging panel (III), and is characterized in that: the voltage and current double-closed-loop speed regulating circuit (I), the supplement circuit (II) and the fault debugging panel (III) are connected through wires (the dotted lines are non-electrical connection) according to electrical lines, fault points K1-K5 are arranged in the voltage and current double-closed-loop speed regulating circuit (I), and the fault points are connected with fault switches on the fault debugging panel through relays in the supplement circuit (II). The comprehensive capabilities of students in fault finding, fault analysis, fault solution and the like aiming at the voltage and current double closed-loop direct current speed regulation technology can be developed.

Description

Voltage and current double-closed-loop direct current speed regulation system checking device
Technical Field
The invention relates to an examination device for double-closed-loop direct-current speed regulation, in particular to an examination device for a voltage and current double-closed-loop direct-current speed regulation system.
Background
Double closed loop dc speed regulation is an important aspect of power electronics technology application. In the traditional vocational education, the method aims at the aspects of system debugging, waveform observation, actual fault analysis and the like which are more important in voltage and current double closed-loop direct current speed regulation. The existing practical training conditions in the market cannot be met, so that the learning obstacles of students in the aspects of voltage and current double closed-loop direct current speed regulation are large.
Therefore, the examination device for the voltage and current double-closed-loop direct current speed regulating system is urgently needed to be developed, and the comprehensive debugging skill of students in the aspect of the voltage and current double-closed-loop direct current speed regulating system can be improved.
Disclosure of Invention
In order to solve the above problems, the present invention aims to provide a voltage and current double closed loop dc speed regulation system assessment device, which enables students to perform system identification, system debugging and waveform observation according to the voltage and current double closed loop dc speed regulation technology, thereby improving comprehensive capabilities of fault finding, fault analysis and fault solution.
In order to achieve the purpose, the invention adopts the technical scheme that: the utility model provides a voltage, two closed loop direct current speed governing system of electric current check device, includes voltage, two closed loop speed governing circuit of electric current (I), supplementary circuit (II) and trouble debugging panel (III), its characterized in that: the voltage and current double-closed-loop speed regulation circuit (I) comprises a given circuit (01), an LM741 regulator A (02), an LM741 regulator B (03), a TC787 three-phase trigger circuit (04), a three-phase drive circuit (05), a three-phase bridge rectifier circuit (06), a direct-current shunt-excited motor circuit (07), an excitation power supply (08), a direct-current generator load circuit (09), a voltage isolator (10), a logic inverter circuit (11) and a current feedback circuit (12), wherein the TC787 three-phase trigger circuit (04) comprises VT 1-VT 6 output pulses, the direct-current shunt-excited motor circuit (07) comprises an ammeter, the direct-current generator load circuit (09) comprises an ammeter, and a fault debugging panel (III) comprises a power switch, a fault switch, a given indicator lamp, a double-closed-loop speed regulation operation indicator lamp, a three-phase fully-controlled rectifier circuit output testing hole, a voltage regulation circuit (I) and a voltage regulation circuit (II) which are, "current feedback circuit input" test hole, "logical inverter circuit input" test hole, supplementary circuit (II) include the relay, voltage, the two closed loop speed governing circuit of electric current (I) with supplementary circuit (II) be connected with the wire (the dotted line is non-electrical connection) according to electric line between trouble debugging panel (III), set up fault point K1 ~ K5 in the two closed loop speed governing circuit of voltage, electric current (I), and link to each other the fault operating switch on relay and the trouble debugging panel that passes through supplementary circuit with the fault point.
The fault points K1-K5 set in the voltage and current double closed-loop direct current speed regulating system are VT2 pulse missing fault points in a TC787 three-phase trigger circuit (04), ammeter open circuit fault points in a simulated direct current shunt excitation motor circuit (07), input open-phase fault points in a simulated current feedback circuit (12), input open circuit fault points in a simulated logic inverse circuit (11) circuit and ammeter open circuit fault points in a simulated direct current generator load circuit (09).
Adopt above-mentioned technical scheme's beneficial effect: a fault point is arranged in the voltage and current double closed loop direct current speed regulation system, and the fault point can be switched on or switched off according to requirements. When a fault point is closed, the graph recognition capability of the voltage and current double closed-loop direct current speed regulating system of a student can be cultured, and the overall analysis and design capability of the voltage and current double closed-loop direct current speed regulating system is improved; when the circuit fault point is opened, the waveform observation, fault analysis and fault solving capabilities of students are cultured, so that the professional skills of the students in the aspect of power electronic technology are improved.
Drawings
FIG. 1 is a schematic diagram of a voltage and current double closed loop DC speed regulating system checking device with fault points K1-K5.
Detailed Description
The invention is described in detail below with reference to the following figures and examples:
the utility model provides a voltage, two closed loop direct current speed governing system of electric current check device, includes voltage, current voltage, two closed loop speed governing circuit of electric current (I), supplementary circuit (II) and trouble debugging panel (III), its characterized in that: the voltage and current double-closed-loop speed regulation circuit (I) comprises a given circuit (01), an LM741 regulator A (02), an LM741 regulator B (03), a TC787 three-phase trigger circuit (04), a three-phase drive circuit (05), a three-phase bridge rectifier circuit (06), a direct-current shunt-excited motor circuit (07), an excitation power supply (08), a direct-current generator load circuit (09), a voltage isolator (10), a logic inverter circuit (11) and a current feedback circuit (12), wherein the TC787 three-phase trigger circuit (04) comprises VT 1-VT 6 output pulses, the direct-current shunt-excited motor circuit (07) comprises an ammeter, the direct-current generator load circuit (09) comprises an ammeter, and a fault debugging panel (III) comprises a power switch, a fault switch, a given indicator lamp, a double-closed-loop speed regulation operation indicator lamp, a three-phase fully-controlled rectifier circuit output testing hole, a voltage regulation circuit (I) and a voltage regulation circuit (II) which are, "current feedback circuit input" test hole, "logical inverter circuit input" test hole, supplementary circuit (II) include the relay, voltage, the two closed loop speed governing circuit of electric current (I) with supplementary circuit (II) be connected with the wire (the dotted line is non-electrical connection) according to electric line between trouble debugging panel (III), set up fault point K1 ~ K5 in the two closed loop speed governing circuit of voltage, electric current (I), and link to each other the fault operating switch on relay and the trouble debugging panel that passes through supplementary circuit with the fault point.
The 5 fault points arranged in the voltage and current double closed loop direct current speed regulating system checking device are respectively as follows:
failure point K1: the absence of VT2 pulses in the TC787 three-phase trigger circuit (04) is simulated. The fault phenomenon is as follows: the 'given indication' lamp is normally lighted, the 'double closed loop speed regulation operation indication' lamp is normally lighted, the circuit can be normally started, but the 'trigger output' pulse test hole VT2 waveform is lost, and the 'three-phase full-control rectification circuit outputs' test hole maximum voltage lower than 300V.
Fault point K2 (located within 07 unit circuit): and an ammeter in the circuit of the analog direct current shunt excitation motor is broken. The fault phenomenon is as follows: the 'given indication' lamp is normally lighted, the 'double closed loop speed regulation operation indication' lamp can not be lighted, the direct current motor has no action, and the circuit can not be normally started.
Fault point K3 (located within a 12-cell circuit): in the analog current feedback circuit (12), the input is open-phase. The fault phenomenon is as follows: the 'given indicating' lamp is normally lighted, and the 'double closed loop speed regulation operation indicating' lamp cannot be lighted; the circuit can be started, the voltage of the test hole is input by the current feedback circuit, the phase is lost, and the circuit operates in a voltage single-closed loop state.
Fault point K4 (located within 11 cell circuit): the input of the analog logic inverse circuit (11) is disconnected. The fault phenomenon is as follows: the 'given indicating' lamp is normally lighted, and the 'double closed loop speed regulation operation indicating' lamp cannot be lighted; the logic inverse circuit input test hole has no voltage, the circuit can be started, and the circuit operates in a single closed loop with current.
Fault point K5 (located within 09 unit circuits): and in the load circuit of the analog direct current generator, the ammeter is disconnected. The fault phenomenon is as follows: the 'given indication' lamp is normally lighted, the 'double closed loop speed regulation operation indication' lamp is normally lighted, the circuit can be started, but the direct current generator does not rotate.

Claims (6)

1. The invention discloses a voltage and current double-closed-loop direct current speed regulation system assessment device, which comprises a voltage and current double-closed-loop speed regulation circuit (I), a supplement circuit (II) and a fault debugging panel (III), and is characterized in that: the voltage and current double-closed-loop speed regulation circuit (I) comprises a given circuit (01), an LM741 regulator A (02), an LM741 regulator B (03), a TC787 three-phase trigger circuit (04), a three-phase drive circuit (05), a three-phase bridge rectifier circuit (06), a direct-current shunt-excited motor circuit (07), an excitation power supply (08), a direct-current generator load circuit (09), a voltage isolator (10), a logic inverter circuit (11) and a current feedback circuit (12), wherein the TC787 three-phase trigger circuit (04) comprises VT 1-VT 6 output pulses, the direct-current shunt-excited motor circuit (07) comprises an ammeter, the direct-current generator load circuit (09) comprises an ammeter, and a fault debugging panel (III) comprises a power switch, a fault switch, a given indicator lamp, a double-closed-loop speed regulation operation indicator lamp, a three-phase fully-controlled rectifier circuit output testing hole, a voltage regulation circuit (I) and a voltage regulation circuit (II) which are, "current feedback circuit input" test hole, "logical inverter circuit input" test hole, supplementary circuit (II) include the relay, voltage, the two closed loop speed governing circuit of electric current (I) with supplementary circuit (II) be connected with the wire (the dotted line is non-electrical connection) according to electric line between trouble debugging panel (III), set up fault point K1 ~ K5 in the two closed loop speed governing circuit of voltage, electric current (I), and link to each other the fault operating switch on relay and the trouble debugging panel that passes through supplementary circuit with the fault point.
2. The voltage-current double closed-loop direct-current speed regulation system assessment device as claimed in claim 1, wherein the fault point K1 is a VT2 pulse missing fault point in an analog TC787 three-phase trigger circuit (04).
3. The device for checking the voltage-current double closed-loop direct-current speed regulation system as claimed in claim 1, wherein the fault point K2 is an open-circuit fault point of an ammeter in an analog direct-current shunt-excited motor circuit (07).
4. The device for checking the voltage-current double closed-loop direct-current speed regulation system as claimed in claim 1, wherein the fault point K3 is an input open-phase fault point in an analog current feedback circuit (12).
5. The voltage-current double closed-loop direct-current speed regulation system assessment device according to claim 1, wherein the fault point K4 is an input open-circuit fault point in an analog logic inverse circuit (11) circuit.
6. The device for checking the voltage-current double closed-loop direct-current speed regulation system as claimed in claim 1, wherein the fault point K5 is a fault point of an open circuit of an ammeter in a load circuit (09) of an analog direct-current generator.
CN202011337200.8A 2020-11-25 2020-11-25 Voltage and current double-closed-loop direct current speed regulation system checking device Withdrawn CN112201129A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202011337200.8A CN112201129A (en) 2020-11-25 2020-11-25 Voltage and current double-closed-loop direct current speed regulation system checking device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202011337200.8A CN112201129A (en) 2020-11-25 2020-11-25 Voltage and current double-closed-loop direct current speed regulation system checking device

Publications (1)

Publication Number Publication Date
CN112201129A true CN112201129A (en) 2021-01-08

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN202011337200.8A Withdrawn CN112201129A (en) 2020-11-25 2020-11-25 Voltage and current double-closed-loop direct current speed regulation system checking device

Country Status (1)

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CN (1) CN112201129A (en)

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