CN203691312U - Chopper speed-regulating system of mining electric locomotive - Google Patents
Chopper speed-regulating system of mining electric locomotive Download PDFInfo
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- CN203691312U CN203691312U CN201420036818.4U CN201420036818U CN203691312U CN 203691312 U CN203691312 U CN 203691312U CN 201420036818 U CN201420036818 U CN 201420036818U CN 203691312 U CN203691312 U CN 203691312U
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Abstract
The utility model discloses a chopper speed-regulating system of a mining electric locomotive. The system comprises a power supply module, a microcontroller, a PWM signal isolation amplification circuit, a protection circuit, a drive circuit, a signal protection circuit and a fault detection circuit. The fault detection circuit is connected with the microcontroller through the signal protection circuit. The fault detection circuit comprises an overvoltage detection circuit, an under-voltage detection circuit and an over-temperature detection circuit. According to the utility model, the fault detection circuit is added, so that the real-time detection of small faults is realized; in addition, the environment of a mine is complex, and the large-power devices are relatively large in number, so that the fault detection circuit is further added to ensure the reliability and the effectiveness of detection signals, and frequent shutdowns caused by the small faults are avoided.
Description
Technical field
The utility model relates to a kind of mine motor vehicle control, particularly a kind of mining electric locomotive chopping regulating speed control system.
Background technology
Current small-sized mining electric locomotive is taking the speed governing of IGBT chopping way control DC motor as main, but in prior art scheme, rate of breakdown is higher, and be not equipped with the circuit that fault detect is relevant, once break down, make production debugging and maintenance become very complicated.
Utility model content
The purpose of this utility model is to provide a kind of mining electric locomotive chopping regulating speed control system that can carry out conventional fault detection.
This mining electric locomotive chopping regulating speed control system that the utility model provides, this system also comprises signal protection circuit and failure detector circuit, the high-speed figure output port of microcontroller is connected with the input of pwm signal isolating amplifier circuit, the output of pwm signal isolating amplifier circuit is connected with the input of drive circuit, the output of drive circuit is connected with the input of power model, the output of power model is connected with the input of protective circuit, the output of protective circuit is connected with the input of drive circuit, its another output is connected with the input of signal isolation circuit, the output of signal isolation circuit is connected with the digital input port of microcontroller, failure detector circuit is connected with microcontroller by signal protection circuit, power module provides power supply signal for microcontroller and protective circuit, described failure detector circuit comprises over-voltage detection circuit, undervoltage detection circuit, excess temperature testing circuit, the signal output part of over-voltage detection circuit is connected with microcontroller by signal protection circuit, and the signal output part of undervoltage detection circuit is connected with microcontroller by signal protection circuit, and the output of excess temperature testing circuit is connected with microcontroller by protective circuit, described power model comprises some IGBT.
Described signal protection circuit adopts photoelectric isolating circuit.Described photoelectric isolating circuit comprises that model is an optocoupler of TLP521.Described over-voltage detection circuit detects the supply voltage of described power module, and its signal output part is connected with the digital input port of described microcontroller via a described optocoupler.Described undervoltage detection circuit detects the supply voltage of described power module, and its signal output part is connected with the digital input port of described microcontroller via a described optocoupler.The signal output part of described excess temperature testing circuit is connected with the digital input port of described microcontroller via a described optocoupler; This circuit carries out temperature detection to described IGBT.Described pwm signal isolating amplifier circuit is connected with microcontroller by No. two optocouplers.Described No. two optocouplers adopt the optocoupler that model is 6N137.
The utility model has increased failure detector circuit, realizes thus the real-time detection that glitch is occurred; Due to mine environment complexity, powerful device is more, and therefore the utility model has also increased signal protection circuit, guarantees reliability and the validity of fault detection signal, has avoided the frequent shutdown being caused by glitch.
Brief description of the drawings
Fig. 1 is theory diagram of the present utility model.
Fig. 2 is the circuit theory diagrams of a kind of execution mode of the present utility model.
Fig. 3 is the workflow diagram of failure detector circuit of the present utility model.
Fig. 4 is the theory diagram of prior art.
Embodiment
As shown in Figure 1, the utility model comprises power model, power module, microcontroller, pwm signal isolating amplifier circuit, drive circuit, signal protection circuit and failure detector circuit.The high-speed figure output port of microcontroller is connected with the input of pwm signal isolating amplifier circuit, the output of pwm signal isolating amplifier circuit is connected with the input of drive circuit, the output of drive circuit is connected with the input of power model, the output of power model is connected with the input of protective circuit, the output of protective circuit is connected with the input of drive circuit, its another output is connected with the input of signal isolation circuit, the output of signal isolation circuit is connected with the digital input port of microcontroller, failure detector circuit is connected with microcontroller by signal protection circuit, power module provides power supply signal for microcontroller and protective circuit, failure detector circuit comprises over-voltage detection circuit, undervoltage detection circuit, excess temperature testing circuit, the signal output part of over-voltage detection circuit is connected with microcontroller by signal protection circuit, and the signal output part of undervoltage detection circuit is connected with microcontroller by signal protection circuit, and the output of excess temperature testing circuit is connected with microcontroller by protective circuit.
Failure detector circuit comprises over-voltage detection circuit, undervoltage detection circuit, excess temperature testing circuit.
Signal protection circuit adopts photoelectric isolating circuit.
Pwm signal isolating amplifier circuit produce isolated from power, shaping, meet drive require pwm signal.
Drive circuit is that power model is carried the needed signal of its normal work.
Power model is a control object of microcontroller.Power model comprises some IGBT.
Protective circuit is according to user and environmental requirement testing circuit state, and can generate switching value signal and reach drive circuit and stop fast power stage, also the switching value signal of this generation can be sent into microcontroller through signal isolation circuit simultaneously.
As shown in Figure 2, whether over-voltage detection circuit there is overvoltage fault for detection of power module.Whether undervoltage detection circuit there is under-voltage fault for detection of power module.Excess temperature testing circuit is for detection of the temperature of IGBT in power model.Failure detector circuit is connected by optocoupler VT1 overvoltage fault-signal, under-voltage fault-signal and excess temperature fault-signal by signal conditioning circuit 2 again with the digital input port of microcontroller.
Signal conditioning circuit 2 is for signal is carried out to current limliting, amplitude limit and power amplification, drives requirement to reach microcontroller pin.
It is the optocoupler of TLP521 that optocoupler VT1 can adopt model.Optocoupler VT4 can adopt the optocoupler of 6N137.
As shown in Figure 3, when work, the utility model is first converted to voltage signal by detection signal (input voltage or current signal), is referred to as to detect voltage; Then reach comparison circuit and compare with the setting voltage of setting before, in the time that detection voltage is greater than setting voltage, this comparison circuit output high level is to signal conditioning circuit 2, otherwise this comparison circuit output high level is to this signal conditioning circuit 2.
Microcontroller can the startup to motor according to the classification of fault-signal, stop or corresponding control operation is carried out in speed governing, has effectively protected each circuit devcie, has improved equipment performance, and personnel's safety is provided safeguard.
Claims (8)
1. a mining electric locomotive chopping regulating speed control system, comprises power model, power module, microcontroller, pwm signal isolating amplifier circuit, protective circuit and drive circuit, it is characterized in that, this system also comprises signal protection circuit and failure detector circuit, the high-speed figure output port of microcontroller is connected with the input of pwm signal isolating amplifier circuit, the output of pwm signal isolating amplifier circuit is connected with the input of drive circuit, the output of drive circuit is connected with the input of power model, the output of power model is connected with the input of protective circuit, the output of protective circuit is connected with the input of drive circuit, its another output is connected with the input of signal isolation circuit, the output of signal isolation circuit is connected with the digital input port of microcontroller, failure detector circuit is connected with microcontroller by signal protection circuit, power module provides power supply signal for microcontroller and protective circuit, described failure detector circuit comprises over-voltage detection circuit, undervoltage detection circuit, excess temperature testing circuit, the signal output part of over-voltage detection circuit is connected with microcontroller by signal protection circuit, and the signal output part of undervoltage detection circuit is connected with microcontroller by signal protection circuit, and the output of excess temperature testing circuit is connected with microcontroller by protective circuit, described power model comprises some IGBT.
2. mining electric locomotive chopping regulating speed control system according to claim 1, is characterized in that, described signal protection circuit adopts photoelectric isolating circuit.
3. mining electric locomotive chopping regulating speed control system according to claim 2, is characterized in that, described photoelectric isolating circuit comprises that model is an optocoupler of TLP521.
4. mining electric locomotive chopping regulating speed control system according to claim 3, it is characterized in that, described over-voltage detection circuit detects the supply voltage of described power module, and its signal output part is connected with the digital input port of described microcontroller via a described optocoupler.
5. mining electric locomotive chopping regulating speed control system according to claim 3, it is characterized in that, described undervoltage detection circuit detects the supply voltage of described power module, and its signal output part is connected with the digital input port of described microcontroller via a described optocoupler.
6. mining electric locomotive chopping regulating speed control system according to claim 3, is characterized in that, the signal output part of described excess temperature testing circuit is connected with the digital input port of described microcontroller via a described optocoupler; This circuit carries out temperature detection to described IGBT.
7. mining electric locomotive chopping regulating speed control system according to claim 1, is characterized in that, described pwm signal isolating amplifier circuit is connected with microcontroller by No. two optocouplers.
8. mining electric locomotive chopping regulating speed control system according to claim 7, is characterized in that, described No. two optocouplers adopt the optocoupler that model is 6N137.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420036818.4U CN203691312U (en) | 2014-01-22 | 2014-01-22 | Chopper speed-regulating system of mining electric locomotive |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420036818.4U CN203691312U (en) | 2014-01-22 | 2014-01-22 | Chopper speed-regulating system of mining electric locomotive |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203691312U true CN203691312U (en) | 2014-07-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420036818.4U Expired - Fee Related CN203691312U (en) | 2014-01-22 | 2014-01-22 | Chopper speed-regulating system of mining electric locomotive |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203691312U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104767439A (en) * | 2015-01-07 | 2015-07-08 | 沙洲职业工学院 | PWM pulse width speed regulation signal setting and fault code feedback circuit |
-
2014
- 2014-01-22 CN CN201420036818.4U patent/CN203691312U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104767439A (en) * | 2015-01-07 | 2015-07-08 | 沙洲职业工学院 | PWM pulse width speed regulation signal setting and fault code feedback circuit |
| CN104767439B (en) * | 2015-01-07 | 2017-04-26 | 沙洲职业工学院 | PWM pulse width speed regulation signal setting and fault code feedback circuit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140702 Termination date: 20180122 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |