CN203925747U - Middle low power diesel generating set protector - Google Patents
Middle low power diesel generating set protector Download PDFInfo
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- CN203925747U CN203925747U CN201420365137.2U CN201420365137U CN203925747U CN 203925747 U CN203925747 U CN 203925747U CN 201420365137 U CN201420365137 U CN 201420365137U CN 203925747 U CN203925747 U CN 203925747U
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Abstract
The utility model relates to a kind of middle low power diesel generating set protector for preventing that diesel generating set from damaging, comprise micro controller module, the system power supply circuit being connected with described micro controller module respectively, current/voltage testing circuit, speed detect circuit, the high oil temperature low oil pressure of high cylinder temperature observation circuit, and setting parameter circuit, its specialization is: described micro controller module output terminal is connected with generator 's parameter display circuit, diesel engine stop circuit, excitation circuit; Described micro controller module comprises microcontroller PIC18F4520 and peripheral circuit; Described system power supply circuit adopts switching mode voltage stabilizer chip LM2576 to obtain the DC electrical source of 5V.The utility model can be protected diesel engine and generator simultaneously, prevents that diesel engine and generator set from damaging.
Description
Technical field
The utility model relates to diesel generator technical field, is specifically related to a kind of middle low power diesel generating set protector for preventing that medium and small diesel generating set from damaging.
Background technique
Existing medium-and-large-sized diesel generating set is in running at present; need oil temperature, water temperature, the oil pressure of monitoring diesel engine automatically; and need to monitor the parameters such as voltage that generator sends, electric current, frequency simultaneously; when a parameter is wherein undesired; requirement can automatic alarm and is processed accordingly or shut down, to protect diesel generating set not damaged.
The oil temperature of automatic monitoring diesel engine of the prior art, water temperature, oil pressure, need to separately carry out with the parameter such as the voltage that sends of monitoring generator, electric current, frequency, at least two group monitoring equipments are worked simultaneously and just can be completed these functions, not only floor space is large, and cost is higher, do not have a kind of equipment to monitor simultaneously.
Summary of the invention
The purpose of this utility model is to provide middle low power diesel generating set protector; it can be too high at the center housing temperature of diesel engine, diesel engine lubricating oil oil temperature is too high; diesel engine oil pressure is too low; diesel engine speed is too high; load current is excessive; in the too high or too low situation of the output voltage of generator, make diesel engine stop, play a protective role.
For achieving the above object, the middle low power diesel generating set protector of the utility model design, comprise micro controller module, the system power supply circuit being connected with described micro controller module respectively, current/voltage testing circuit, speed detect circuit, the high oil temperature low oil pressure of high cylinder temperature observation circuit, and setting parameter circuit, its specialization is: described micro controller module output terminal is connected with generator 's parameter display circuit, diesel engine stop circuit, excitation circuit; Described micro controller module comprises microcontroller PIC18F4520 and peripheral circuit; The VDC that described system power supply circuit adopts switching mode voltage stabilizer chip LM2576 to transfer 12V VDC to 5V is powered to described micro controller module; Described current/voltage testing circuit comprises the single power supply Hall voltage sensor for detection of group of motors output AC voltage, and for detection of the single power supply Hall current sensor of group of motors output AC electric current; Described speed detect circuit comprises optical coupler, for detection of a-c cycle, sinusoidal ac signal is transformed into the square-wave signal that can be identified by micro controller module; The input end of the high oil temperature low oil pressure of described high cylinder temperature observation circuit receives respectively the switching signal from cylinder temperature sensor, oil temperature sensor and oil pressure sensor output; Described setting parameter circuit comprises three key circuits, and the output terminal of described three key circuits connects the control input end of described micro controller module, for setting voltage upper and lower, upper current limit, rotating speed upper and lower; The digital pipe driving chip MAX7219 that four eight segment numeral pipes of described generator 's parameter display circuit enclosed mass are connected with four eight segment numeral pipe input ends, the input end of four eight segment numeral pipes connects the control output end of micro controller module, the rotating speed of the alternating current (a.c.) of exporting for the generator set described in showing and voltage, diesel engine; Described diesel engine stop circuit comprises driving chip BTS621 and peripheral circuit, described driving chip BTS621 is connected with the input end of described micro controller module, for receiving cylinder temperature, oil temperature, the fuel injection pressure signal of the diesel engine of micro controller module collection, and by low and high level signal by output terminal OUT1 input to normally opened relay, normally closed relay moves, described normally opened relay, normally closed relay are connected with diesel engine; Described excitation circuit comprises driving chip BTS621 and peripheral circuit, described driving chip BTS621 is connected with the input end of described micro controller module, be used for receiving generator set voltage and current signal and export low and high level by output terminal OUT2, described output terminal OUT2 is connected with the input end of generator set.
In technique scheme, optical coupler in described speed detect circuit, when the positive half cycle of 13VAC power supply at sine wave, the conducting of optical coupler input end, output terminal output low level, when 13VAC power supply is during at sinusoidal wave negative half period, the cut-off of optical coupler input end, output terminal output high level, described microcontroller PIC18F4520 detects the square signal frequency of optical coupler output terminal, detects the rotating speed of diesel engine.
In technique scheme, the key contacts two ends in three key circuits of described setting parameter circuit are parallel with electric capacity and resistance, and described electric capacity and resistance are connected in series.
The utility model system power supply circuit is powered to micro controller module.Micro controller module gathers the signal of setting by setting parameter circuit, micro controller module is monitored the output voltage of diesel generating set and electric current by current/voltage testing circuit, micro controller module is monitored the running speed of diesel generating set by rotation speed monitoring circuit, microcontroller is by high cylinder temperature, high oil temperature, low oil pressure circuit is monitored the gentle machine oil oil temperature of the cylinder of diesel generating set oil pressure, the value of monitoring result and initialization circuit setting is compared, when the parameter monitoring when foregoing circuit does not meet the value of imposing a condition, control relay action is closed oil feeding line and field circuit in diesel engine stop circuit and excitation circuit circuit, thereby close the output of diesel generating set, and arrange and on display circuit, show error code in parameter.
The utility model adopts single power supply Hall voltage sensor and single power supply Hall current sensor, detect respectively group of motors output AC electric current box output AC voltage, than traditional electric current, voltage transformer utilizes electromagnetic induction principle to electric current, voltage is measured, precision is 3% to 5% and is only applicable to 50Hz in sinusoidal waveform, current/voltage testing circuit of the present utility model utilizes the principle of Hall effect to voltage, electric current is measured, direct current and alternating current (a.c.) can be measured, therefore go for alternating current generating sets DC generation unit, and precision is better than 1% in operating temperature district, this precision is suitable for the measurement of any waveform, and there is the linearity and be better than 0.1%, response time is less than 1 μ s tracking velocity di/dt higher than 50A/ μ s, the advantages such as dynamic performance is good.
In addition, Hall transducer working band wide in 0-100kHz frequency range precision be 1%.In 0-5kHz frequency range, precision is 0.5%, and when Hall transducer primary current overburdening, module reaches capacity, and can automatically protect, and has advantages of that volume is little, lightweight, highly sensitive, anti-electromagnetic interference capability is strong.Micro controller module of the present utility model adopts PIC18F4520 as acp chip, and not only pin is many, is convenient to button and shows control, and motion speed accelerates to reach 40Mhz, can carry out high-speed computation, match with the improvement of sensor, can improve testing precision, react more rapid.
The utility model adopts integrated drive chips BTS621 as diesel engine and generator action control chip, than adopted relay in the past, because relay is mechanical contact, in working procedure, there will be ablation, life-span is limited, when electric current is excessive, there will be the problems such as bonding, and adopt integrated drive chips BTS621 there is no coil, can not produce electromagnetic interference, effectively improve the working environment of CPU, antijamming capability is good, and reliability is high.
Accompanying drawing explanation
Fig. 1 is schematic block circuit diagram of the present utility model;
Fig. 2 is the circuit diagram of micro controller module of the present utility model (6);
Fig. 3 is the circuit diagram of system power supply circuit of the present utility model (1);
Fig. 4 is the circuit diagram of current/voltage testing circuit of the present utility model (2);
Fig. 5 is the circuit diagram of speed detect circuit of the present utility model (3);
Fig. 6 is the circuit diagram of high cylinder temperature of the present utility model high oil temperature low oil pressure observation circuit (4);
Fig. 7 is the circuit diagram of setting parameter circuit of the present utility model (5);
Fig. 8 is the circuit diagram of generator 's parameter display circuit of the present utility model (7);
Fig. 9 is the circuit diagram of excitation circuit of the present utility model (9);
In figure: 1-system power supply circuit; 2-current/voltage testing circuit; 3-speed detect circuit; The high oil temperature low oil pressure of the high cylinder temperature of 4-observation circuit; 5-setting parameter circuit; 6-micro controller module; 7-generator 's parameter display circuit; 8-diesel engine stop circuit; 9-excitation circuit.
Embodiment
Below in conjunction with the drawings and specific embodiments, the utility model is described in further detail:
Diesel generating set protector as shown in Figure 1, comprise micro controller module 6, the system power supply circuit 1 being connected with micro controller module 6 respectively, current/voltage testing circuit 2, speed detect circuit 3, the high oil temperature low oil pressure of high cylinder temperature observation circuit 4, and setting parameter circuit 5, micro controller module 6 output terminals are connected with generator 's parameter initialization circuit 7, diesel engine stop circuit 8, excitation circuit 9; Micro controller module 6 comprises microcontroller PIC18F4520 and peripheral circuit; The VDC that system power supply circuit 1 adopts switching mode voltage stabilizer chip LM2576 12V VDC to be transferred to 5V is powered to described micro controller module 6; Current/voltage testing circuit 2 comprises the single power supply Hall voltage sensor for detection of group of motors output AC voltage, and for detection of the single power supply Hall current sensor of group of motors output AC electric current; Speed detect circuit 3 comprises optical coupler, for detection of a-c cycle, sinusoidal ac signal is transformed into the square-wave signal that can be identified by micro controller module 6; The input end of the high oil temperature low oil pressure of high cylinder temperature observation circuit 4 receives respectively the switching signal from cylinder temperature sensor, oil temperature sensor and oil pressure sensor output; Setting parameter circuit 5 comprises three key circuits, and the output terminal of three key circuits connects the control input end of micro controller module 6, for setting voltage upper and lower, upper current limit, rotating speed upper and lower; The digital pipe driving chip MAX7219 that four eight segment numeral pipes of generator 's parameter initialization circuit 7 enclosed mass are connected with four eight segment numeral pipe input ends, the input end of four eight segment numeral pipes connects the control output end of micro controller module 6, the rotating speed of the alternating current (a.c.) of exporting for the generator set showing and voltage, diesel engine; Diesel engine stop circuit 8 comprises driving chip BTS621 and peripheral circuit; drive chip BTS621 to be connected with the input end of micro controller module 6; for receiving cylinder temperature, oil temperature, the fuel injection pressure signal of the diesel engine of micro controller module 6 collections; and by low and high level signal by output terminal OUT1 input to normally opened relay, normally closed relay moves, normally opened relay, normally closed relay are connected with diesel engine.
Excitation circuit 9 comprises driving chip BTS621 and peripheral circuit, drive chip BTS621 to be connected with the input end of micro controller module 6, be used for receiving generator set voltage and current signal and export low and high level by output terminal OUT2, output terminal OUT2 is connected with the input end of generator set.
Optical coupler in speed detect circuit 3, when the positive half cycle of 13VAC power supply at sine wave, the conducting of optical coupler input end, output terminal output low level, when 13VAC power supply is during at sinusoidal wave negative half period, the cut-off of optical coupler input end, output terminal output high level, microcontroller PIC18F4520 detects the square signal frequency of optical coupler output terminal, detects the rotating speed of diesel engine.Key contacts two ends in three key circuits of setting parameter circuit 5 are parallel with electric capacity and resistance, and electric capacity and resistance are connected in series, and can remove the burr in switching process, play the effect of filtering.
The microcontroller that micro controller module 6 as shown in Figure 2 adopts is industrial microprocessor PIC18F4520, can complete regularly, analog-to-digital function, and IO pin has stronger driving force, and the function of voltage and frequency sampling in can completing circuit.
System power supply circuit 1 as shown in Figure 3, the DC electrical source that obtains 5V by special-purpose stabilized power supply chip LM2576 completes interchange 12V to the transformation of direct current 5V, low in energy consumption, has larger driving force.
Current/voltage testing circuit 2 as shown in Figure 4 completes the function of the detection of generator set output AC voltage and alternating current (a.c.), the detection of alternating current (a.c.) adopts the Hall current sensor of single power supply as sensor, the Hall current sensor of single power supply can be exported the voltage of a 0-5V, represent the size of electric current, by single-chip microcomputer, identified.The detection of alternating voltage adopts the Hall voltage sensor of single power supply as sensor, and the Hall voltage sensor of single power supply can be exported the voltage of a 0-5V, and the size of representative voltage, is identified by single-chip microcomputer.
Speed detect circuit 3 shown in Fig. 5 detects for completing a-c cycle, realizes sinusoidal ac signal to the transformation of the rectangular wave that can be identified by microcontroller.Adopt optical coupler to realize the transformation of electrical signal, when the positive half cycle of 13VAC power supply at sine wave, the conducting of optocoupler input end, output terminal output low level.When 13VAC power supply is during at sinusoidal wave negative half period, the cut-off of optocoupler input end, output terminal output high level.
The high oil temperature low oil pressure of high cylinder temperature observation circuit 4 as shown in Figure 6, be used for center housing temperature, the detection of oil temperature and engine oil pressure, these three detections realize circuit just as, receive and come from cylinder temperature sensor respectively, the signal of oil temperature sensor and oil pressure sensor, what the sensor adopting was exported is switching signal.
Setting parameter circuit 5 as shown in Figure 7, for completing the setting of parameter, three buttons to realize circuit the same, when button not according to time, what the IO mouth of CPU received is high level, when pushing button, what the IO mouth of CPU received is low level.Three buttons have following functions according to the length of combination and compressing time: show electric current, show electric current, show rotating speed, setting voltage upper and lower, sets upper current limit, sets rotating speed upper and lower.Due in parallel electric capacity and resistance in key contacts, can remove the burr in switching process, play the effect of filtering.
Generator 's parameter display circuit 7 as shown in Figure 8 adopts four eight segment numeral pipes to show, nixie tube adopts special-purpose drive circuit MAX7219 to realize, MAX7219 carries scan function, can offloading the CPU, there is constant current inside, show more stablely, reduce the number of outer meeting resistance, make circuit reduction.MAX7219 and cpu i/f are simple, adopt serial-port communication, and the IO number that takies CPU is few.
As the diesel engine stop circuit 8 of Fig. 9, the cylinder temperature of the diesel engine that circuit is received, oil temperature; fuel injection pressure signal, compares with the signal of setting, and meets setting signal; do not open protection action, this time, normally opened relay remained open, and normally closed relay remains closed; the signal receiving when circuit does not meet setting signal; open protection action, change the state of a control of relay, normally opened relay is closed; normally closed relay disconnects, and normally opened relay is connected with the control end of diesel engine with normally closed relay.The circuit theory of excitation circuit 9 is identical with Fig. 9; adopt high-power driving chip BTS621 to realize; the generator voltage that single-chip microcomputer receives by Acquisition Circuit and current signal are compared with setting signal; meet setting signal and do not protect action; the OUT1 output high level of BTS621; if generator voltage and current signal that Acquisition Circuit receives do not meet setting signal, just protect the OUT1 output low level of BTS621.
The content not being described in detail in this specification belongs to the known prior art of professional and technical personnel in the field.
Claims (3)
1. a middle low power diesel generating set protector; comprise micro controller module (6), the system power supply circuit (1) being connected with described micro controller module (6) respectively, current/voltage testing circuit (2), speed detect circuit (3), high cylinder temperature high oil temperature low oil pressure observation circuit (4); and setting parameter circuit (5), it is characterized in that:
Described micro controller module (6) output terminal is connected with generator 's parameter display circuit (7), diesel engine stop circuit (8), excitation circuit (9); Described micro controller module (6) comprises microcontroller PIC18F4520 and peripheral circuit;
The VDC that described system power supply circuit (1) adopts switching mode voltage stabilizer chip LM2576 to transfer 12V VDC to 5V is powered to described micro controller module (6);
Described current/voltage testing circuit (2) comprises the single power supply Hall voltage sensor for detection of group of motors output AC voltage, and for detection of the single power supply Hall current sensor of group of motors output AC electric current;
Described speed detect circuit (3) comprises optical coupler, and for detection of a-c cycle, sinusoidal ac signal is transformed into can be by the square-wave signal of micro controller module (6) identification;
The input end of described high cylinder temperature high oil temperature low oil pressure observation circuit (4) receives respectively the switching signal from cylinder temperature sensor, oil temperature sensor and oil pressure sensor output;
Described setting parameter circuit (5) comprises three key circuits, and the output terminal of described three key circuits connects the control input end of described micro controller module (6), for setting voltage upper and lower, upper current limit, rotating speed upper and lower;
The digital pipe driving chip MAX7219 that four eight segment numeral pipes of described generator 's parameter display circuit (7) enclosed mass are connected with four eight segment numeral pipe input ends, the input end of four eight segment numeral pipes connects the control output end of micro controller module (6), the rotating speed of the alternating current (a.c.) of exporting for the generator set described in showing and voltage, diesel engine;
Described diesel engine stop circuit (8) comprises driving chip BTS621 and peripheral circuit, described driving chip BTS621 is connected with the input end of described micro controller module (6), be used for receiving cylinder temperature, oil temperature, the fuel injection pressure signal of the diesel engine that micro controller module (6) gathers, and by low and high level signal by output terminal OUT1 input to normally opened relay, normally closed relay moves, described normally opened relay, normally closed relay are connected with diesel engine;
Described excitation circuit (9) comprises driving chip BTS621 and peripheral circuit, described driving chip BTS621 is connected with the input end of described micro controller module (6), be used for receiving generator set voltage and current signal and export low and high level by output terminal OUT2, described output terminal OUT2 is connected with the input end of generator set.
2. middle low power diesel generating set protector according to claim 1; it is characterized in that: the optical coupler in described speed detect circuit (3); when the positive half cycle of 13VAC power supply at sine wave; the conducting of optical coupler input end, output terminal output low level, when 13VAC power supply is during at sinusoidal wave negative half period; the cut-off of optical coupler input end; output terminal output high level, described microcontroller PIC18F4520 detects the square signal frequency of optical coupler output terminal, detects the rotating speed of diesel engine.
3. middle low power diesel generating set protector according to claim 1 and 2, is characterized in that: the key contacts two ends in three key circuits of described setting parameter circuit (5) are parallel with electric capacity and resistance, and described electric capacity and resistance are connected in series.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420365137.2U CN203925747U (en) | 2014-07-03 | 2014-07-03 | Middle low power diesel generating set protector |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420365137.2U CN203925747U (en) | 2014-07-03 | 2014-07-03 | Middle low power diesel generating set protector |
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| CN203925747U true CN203925747U (en) | 2014-11-05 |
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| CN201420365137.2U Expired - Fee Related CN203925747U (en) | 2014-07-03 | 2014-07-03 | Middle low power diesel generating set protector |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107023340A (en) * | 2017-05-23 | 2017-08-08 | 湖北科技学院 | A kind of automobile engine |
| CN112462259A (en) * | 2020-11-19 | 2021-03-09 | 西安热工研究院有限公司 | Automatic determination device and method for load-carrying limit time of black-start diesel generator |
| CN113533837A (en) * | 2021-06-23 | 2021-10-22 | 上海南土信息科技有限公司 | Alternating current detection module |
| CN113791239A (en) * | 2021-09-01 | 2021-12-14 | 哈尔滨工程大学 | Diesel engine rotating speed signal preamplification device |
| CN116207816A (en) * | 2022-12-31 | 2023-06-02 | 常柴股份有限公司 | Unmanned aerial vehicle charging system and method |
-
2014
- 2014-07-03 CN CN201420365137.2U patent/CN203925747U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107023340A (en) * | 2017-05-23 | 2017-08-08 | 湖北科技学院 | A kind of automobile engine |
| CN112462259A (en) * | 2020-11-19 | 2021-03-09 | 西安热工研究院有限公司 | Automatic determination device and method for load-carrying limit time of black-start diesel generator |
| CN113533837A (en) * | 2021-06-23 | 2021-10-22 | 上海南土信息科技有限公司 | Alternating current detection module |
| CN113791239A (en) * | 2021-09-01 | 2021-12-14 | 哈尔滨工程大学 | Diesel engine rotating speed signal preamplification device |
| CN116207816A (en) * | 2022-12-31 | 2023-06-02 | 常柴股份有限公司 | Unmanned aerial vehicle charging system and method |
| CN116207816B (en) * | 2022-12-31 | 2024-03-29 | 常柴股份有限公司 | Unmanned aerial vehicle charging system and method |
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| 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: 20141105 Termination date: 20160703 |
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| CF01 | Termination of patent right due to non-payment of annual fee |