CN216670947U - Checking device for reversible direct current pulse width speed regulation system - Google Patents
Checking device for reversible direct current pulse width speed regulation system Download PDFInfo
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- CN216670947U CN216670947U CN202122448835.1U CN202122448835U CN216670947U CN 216670947 U CN216670947 U CN 216670947U CN 202122448835 U CN202122448835 U CN 202122448835U CN 216670947 U CN216670947 U CN 216670947U
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Abstract
The utility model discloses a checking device of a reversible direct current pulse width speed regulation system, which is provided with a tetragonal box body, comprises a reversible direct current pulse width speed regulation circuit, an auxiliary circuit and a fault operation panel, and is characterized in that: the reversible direct current pulse width speed regulation circuit is positioned at the bottom of the box body, the fault operation panel is positioned at the periphery and the upper part, wires are connected between the reversible direct current pulse width speed regulation circuit and the auxiliary circuit as well as between the reversible direct current pulse width speed regulation circuit and the fault operation panel according to electric lines, the direct current shunt excitation motor, the direct current generator and the tachogenerator are coaxially connected and are represented by dotted lines, fault points K1-K5 are arranged in the reversible direct current pulse width speed regulation circuit, and the fault points are connected with a fault operation switch on the fault operation panel through a relay of the auxiliary circuit. And the teacher can flexibly set faults in the test training and check the faults conveniently.
Description
Technical Field
The utility model relates to an examination device for direct current pulse width speed regulation, in particular to an examination device for a reversible direct current pulse width speed regulation system.
Background
Dc pulse width speed regulation is an important aspect of power electronics applications. 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 reversible direct current pulse width speed regulation. The existing practical training conditions in the market cannot be met, so that the learning obstacle of students in the aspect of reversible direct current pulse width speed regulation is large.
Therefore, the reversible direct current pulse width speed regulation system examination device is developed, and the comprehensive debugging skill of students in the aspect of the reversible direct current pulse width speed regulation system can be improved.
SUMMERY OF THE UTILITY MODEL
In order to solve the problems, the utility model aims to provide a reversible direct current pulse width speed regulation system assessment device, and students can perform system identification, system debugging and waveform observation aiming at the reversible direct current pulse width speed regulation technology, so that the comprehensive capabilities of fault finding, fault analysis, fault solution and the like are further improved.
In order to achieve the purpose, the utility model adopts the technical scheme that: the utility model provides a reversible direct current pulse width speed control system examines device, has the tetragonal body box, including reversible direct current pulse width speed control circuit, auxiliary circuit and trouble operation panel, its characterized in that: the reversible direct current pulse width speed regulation circuit is positioned at the bottom of the box body, the fault operation panel is positioned on the periphery and the upper part of the box body, the reversible direct current pulse width speed regulation circuit comprises a given voltage (01) of 0-15V, a speed regulator (02), a current regulator (03), a PWM (pulse width modulation) wave generator (04), four groups of PWM wave generators (05), a double closed loop bridge type DC/DC conversion circuit (06), a direct current shunt excitation motor circuit (07), an excitation power supply A (08), a direct current generator load circuit (09), a speed measurement generator (10), a speed feedback (11), a current feedback (12) and an excitation power supply B (13), the four groups of PWM wave generators (05) comprise VT 1-VT 4 output pulses, the direct current shunt excitation motor circuit (07) comprises an ammeter, the direct current generator load circuit (09) comprises an ammeter, and the fault operation panel comprises a power switch, Trouble switch, "0 ~ 15V gives instruction" lamp, "reversible pulse width speed governing operation instruction" lamp, "four groups PWM ripples pulse output" test holes, "current feedback input" test hole, "speed feedback input" test hole, auxiliary circuit includes the relay, reversible direct current pulse width speed governing circuit with auxiliary circuit fault operation panel between be connected with the wire according to electric line, coaxial hookup between direct current shunt excitation motor and direct current generator, the tachogenerator shows with the dotted line, set up fault point K1 ~ K5 in the reversible direct current pulse width speed governing circuit, and link to each other fault operation switch on relay and the fault operation panel that passes through auxiliary circuit with the fault point.
The fault points K1-K5 set in the reversible direct current pulse width speed regulation system are VT1 pulse missing fault points in the four groups of PWM wave generators (05), output open-circuit fault points of the analog excitation power supply A, input open-circuit fault points in the analog current feedback (12) circuit, input open-circuit fault points in the analog speed feedback (11) circuit, and open-circuit fault points in the analog direct current generator load circuit (09) respectively.
Adopt above-mentioned technical scheme's beneficial effect: a fault point is arranged in the reversible direct current pulse width 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 reversible direct current pulse width speed regulation system of a student can be cultured, and the overall analysis and design capability of the reversible direct current pulse width speed regulation 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 reversible DC pulse width speed regulation system assessment device provided with fault points K1-K5.
Detailed Description
The utility model is described in detail below with reference to the following figures and examples: the utility model provides a reversible direct current pulse width speed control system examination device, has the tetragonal body box, including reversible direct current pulse width speed control circuit, auxiliary circuit and trouble operation panel, its characterized in that: the reversible direct current pulse width speed regulation circuit is positioned at the bottom of the box body, the fault operation panel is positioned on the periphery and the upper part of the box body, the reversible direct current pulse width speed regulation circuit comprises a given voltage (01) of 0-15V, a speed regulator (02), a current regulator (03), a PWM (pulse width modulation) wave generator (04), four groups of PWM wave generators (05), a double closed loop bridge type DC/DC conversion circuit (06), a direct current shunt excitation motor circuit (07), an excitation power supply A (08), a direct current generator load circuit (09), a speed measurement generator (10), a speed feedback (11), a current feedback (12) and an excitation power supply B (13), the four groups of PWM wave generators (05) comprise VT 1-VT 4 output pulses, the direct current shunt excitation motor circuit (07) comprises an ammeter, the direct current generator load circuit (09) comprises an ammeter, and the fault operation panel comprises a power switch, Trouble switch, "0 ~ 15V gives instruction" lamp, "reversible pulse width speed governing operation instruction" lamp, "four groups PWM ripples pulse output" test holes, "current feedback input" test hole, "speed feedback input" test hole, auxiliary circuit includes the relay, reversible direct current pulse width speed governing circuit with auxiliary circuit fault operation panel between be connected with the wire according to electric line, coaxial hookup between direct current shunt excitation motor and direct current generator, the tachogenerator shows with the dotted line, set up fault point K1 ~ K5 in the reversible direct current pulse width speed governing circuit, and link to each other fault operation switch on relay and the fault operation panel that passes through auxiliary circuit with the fault point.
The 5 fault points arranged in the checking device of the reversible direct current pulse width speed regulating system are respectively as follows:
failure point K1: the VT1 pulse missing in the four sets of PWM wave generators (05) was simulated. The fault phenomenon is as follows: the '0-15V given indication' lamp is normally lighted, the 'reversible pulse width speed regulation operation indication' lamp is normally lighted, the circuit can be normally started, but the waveforms of the 'four groups of PWM wave pulse output' test holes VT1 are lacked.
Failure point K2: and the output of the excitation power supply A is simulated to be open circuit. The fault phenomenon is as follows: the '0-15V given indication' lamp is normally lighted, the 'reversible pulse width speed regulation operation indication' lamp cannot be lighted, the direct current motor does not act, and the circuit cannot be normally started.
Failure point K3: in the analog current feedback (12) circuit, the input is open circuit. The fault phenomenon is as follows: the '0-15V given indication' lamp is normally lighted, and the 'reversible pulse width speed regulation operation indication' lamp cannot be lighted; the circuit can be started, the voltage of a 'current feedback input' test hole is 0, and the circuit operates in a rotating speed single-closed loop state.
Failure point K4: the input of the analog speed feedback (11) circuit is open circuit. The fault phenomenon is as follows: the '0-15V given indication' lamp is normally lighted, and the 'reversible pulse width speed regulation operation indication' lamp cannot be lighted; the "speed feedback input" test hole voltage is 0 and the circuit can start and operate in a single closed loop with current.
Failure point K5: in the analog DC generator load circuit (09), the ammeter is disconnected. The fault phenomenon is as follows: the '0-15V given indication' lamp is normally lighted, the 'reversible pulse width 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 utility model provides a reversible direct current pulse width speed control system examination device, has the tetragonal body box, including reversible direct current pulse width speed control circuit, auxiliary circuit and trouble operation panel, its characterized in that: the reversible direct current pulse width speed regulation circuit is positioned at the bottom of the box body, the fault operation panel is positioned on the periphery and the upper part of the box body, the reversible direct current pulse width speed regulation circuit comprises a given voltage (01) of 0-15V, a speed regulator (02), a current regulator (03), a PWM (pulse width modulation) wave generator (04), four groups of PWM wave generators (05), a double closed loop bridge type DC/DC conversion circuit (06), a direct current shunt excitation motor circuit (07), an excitation power supply A (08), a direct current generator load circuit (09), a tachometer generator (10), a speed feedback (11), a current feedback (12) and an excitation power supply B (13), the four groups of PWM wave generators (05) comprise VT 1-VT 4 output pulses, the direct current shunt excitation motor circuit (07) comprises an ammeter, the direct current generator load circuit (09) comprises an ammeter, and the fault operation panel comprises a power switch, The fault switch, "0 ~ 15V gives the instruction" lamp, "reversible pulse width governing operation instruction" lamp, "four groups PWM ripples pulse output" test holes, "current feedback input" test hole, "velocity feedback input" test hole, auxiliary circuit includes the relay, reversible direct current pulse width governing circuit with auxiliary circuit fault operation panel between be connected with the wire according to electric line, coaxial hookup between direct current shunt excitation motor and DC generator, the tachogenerator shows with the dotted line, set up fault point K1 ~ K5 in the reversible direct current pulse width governing circuit, and link to each other the fault switch on relay and the fault operation panel that passes through auxiliary circuit with the fault point.
2. The system assessment device for reversible direct current pulse width speed regulation according to claim 1, wherein the fault point K1 is a VT1 pulse missing fault point in a simulated four-group PWM wave generator (05).
3. The system assessment device for the speed regulation system of the reversible direct current pulse width according to claim 1, wherein the fault point K2 is an output open circuit fault point of an analog excitation power supply a.
4. The system assessment device for the speed regulation of the reversible direct current pulse width according to claim 1, wherein the fault point K3 is an input open circuit fault point in an analog current feedback (12) circuit.
5. The system assessment device for the speed regulation of the reversible direct current pulse width according to claim 1, wherein the fault point K4 is an input open circuit fault point in an analog speed feedback (11) circuit.
6. The system assessment device for the reversible direct current pulse width speed regulation system according to claim 1, wherein the fault point K5 is an open-circuit fault point of an ammeter in a load circuit (09) of an analog direct current generator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122448835.1U CN216670947U (en) | 2021-10-12 | 2021-10-12 | Checking device for reversible direct current pulse width speed regulation system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122448835.1U CN216670947U (en) | 2021-10-12 | 2021-10-12 | Checking device for reversible direct current pulse width speed regulation system |
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| Publication Number | Publication Date |
|---|---|
| CN216670947U true CN216670947U (en) | 2022-06-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122448835.1U Active CN216670947U (en) | 2021-10-12 | 2021-10-12 | Checking device for reversible direct current pulse width speed regulation system |
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| Country | Link |
|---|---|
| CN (1) | CN216670947U (en) |
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2021
- 2021-10-12 CN CN202122448835.1U patent/CN216670947U/en active Active
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