CN102797566A - Precognition type electronic speed regulator of generator set and speed regulating method thereof - Google Patents
Precognition type electronic speed regulator of generator set and speed regulating method thereof Download PDFInfo
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- CN102797566A CN102797566A CN2012103292727A CN201210329272A CN102797566A CN 102797566 A CN102797566 A CN 102797566A CN 2012103292727 A CN2012103292727 A CN 2012103292727A CN 201210329272 A CN201210329272 A CN 201210329272A CN 102797566 A CN102797566 A CN 102797566A
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Abstract
The invention relates to a precognition type electronic speed regulator of a generator set and a speed regulating method thereof. The precognition type electronic speed regulator of the generator set is characterized in that a current sampling circuit sampling the currents of the generator set is added on the basis of the traditional device, and a microprocessor monitors generator set current sampling signals transmitted by the current sampling circuit in real time; when the generator set current sampling signals are suddenly substantially increased, the microprocessor immediately controls and increases the oil supply quantity of a motor so that the motor of the generator set have sufficient capability to prevent rotating speed from being substantially decreased because loads are suddenly increased; with such a same way, when load currents are substantially decreased, the precognition type electronic speed regulator can start to substantially decrease fuel oil supply before the rotating speed of the motor is not increased to prevent the rotating speed from being substantially increased because the loads are suddenly unloaded so that the loading capability of the generator set is enhanced and the synchronous motor loading capability is enhanced especially, and therefore, the precognition type electronic speed regulator can control the fluctuation rate of the rotating speed of the motor to be kept in an optimal state under any loading condition.
Description
Technical field
The present invention relates to the engine control technology, especially a kind of generator set prevision formula electronic speed regulator and corresponding speed regulating method belong to the engine governed speed field.
Background technique
Generator set is as commonly used or standby power supply extensive use in modern society.The major function of the important control device speed regulator of generator set be control motor rotating speed in the scope of needs.Promptly when the load of generator set changes, can regulate the fuel feed of motor automatically, as much as possible little with the fluctuation that keeps engine speed.Along with the generator set development of technology, speed regulator has also experienced mechanical speed governor, hydraulic speed governor, pneumatic governor, analog electronic speed regulator and digital electronic speed regulator several stages.Wherein the digital electronic speed regulator mainly is made up of speed probe, input circlult, microprocessor, drive circuit, final controlling element, communication circuit and power circuit.The tach signal that speed probe produces after the input circlult conversion, is sent into microprocessor; Microprocessor carries out exporting control signal after PID (PID algorithm) computing to tach signal; Control signal is the control actuator turns after drive circuit amplifies; Actuator turns causes the variation of engine fuel supply amount, thereby changes the rotating speed of motor.More than these control procedures formed a closed loop control.Thereby the advantage of digital electronic speed regulator is its parameter and can debugs the speed governing requirement that is suitable for different motors easily, therefore is widely used.
As everyone knows, the main load of generator set is our common asynchronous motor, like refrigerator, air-conditioning and washing machine etc. all by Induction Motor-Driven.Because the inrush current of asynchronous motor is more than 2 times of its rated current.For example for refrigerator, the power of allotting group of motors should be 4 times of the own power of refrigerator; For washing machine, the power of allotting group of motors should be 3 times of the own power of washing machine; For air-conditioning, the power of allotting group of motors should be 2 times of the own power of air-conditioning.
When on the generator set band during asynchronous motor, the electric current of generator can increase suddenly, and since the rotating speed of action of inertia motor just can begin to descend behind the certain hour at interval.And all speed regulators all are after detecting the rotating speed reduction of motor, just can increase fuel at present, and this has lagged behind in control.Owing to the combustion characteristic of motor, even if fuel increases, the moment of torsion of motor can not increase sharply yet in addition, just can begin to rise behind the certain hour so that the rotating speed of motor can then descend, and this drags dead motor when being easy to cause asynchronous motor to start.So when matching generator set for the such load of asynchronous motor, require to leave enough power redundancy, this is undoubtedly low load with strong power, causes user cost to increase.
Summary of the invention
Above-mentioned deficiency to the existing technology existence; The present invention provides a kind of generator set prevision formula electronic speed regulator and corresponding speed regulating method; The present invention can the anticipation motor rotation speed change trend; Thereby before engine speed change, begin control, fluctuate widely, reach the ability that improves generator set band asynchronous motor load to prevent engine speed.
To achieve these goals; The objective of the invention is to realize like this: a kind of generator set prevision formula electronic speed regulator; Comprise speed probe, operation/IS Idle Switch, input circlult and microprocessor, this speed probe is connected with the input end of said input circlult respectively with operation/IS Idle Switch, and the output terminal of this input circlult is connected with the input end of said microprocessor; The output terminal of this microprocessor is connected with the stepper motor final controlling element through stepper motor driving circuit; It is characterized in that, also comprise the current sampling circuit that is used for the generator set current sampling, the output terminal of this current sampling circuit is connected with the input end of said input circlult.
Speed probe, operation/IS Idle Switch are transferred to input circlult with engine rotational speed signal, operation/idle signal respectively in real time; Engine rotational speed signal is transferred to microprocessor after input circlult converts square-wave signal into; Microprocessor carries out outputting a control signal to stepper motor driving circuit after the PID computing to tach signal; This stepper motor driving circuit amplifies back control step motor final controlling element to the signal of importing to be controlled the engine oil amount, makes engine running in rated speed.Engine speed changes, and the variation of stepper motor final controlling element work causing engine fuel supply amount operates in rated speed thereby regulate motor.Above control procedure has formed a closed loop control system.Operation/IS Idle Switch is used to switch the working state of generator set.
The generator set current sampling signal of the real-time monitoring current sample circuit output of microprocessor.When the significantly increase suddenly of generator set current sampling signal, microprocessor is controlled immediately and is improved the engine oil amount, makes the motor of generator set have enough abilities to stop because the rotating speed that load increase suddenly causes declines to a great extent; When should load current significantly reducing; Speed regulator can just begin significantly to reduce fuel delivery before engine speed does not rise; Prevent that unloading the rotating speed that causes owing to load is prominent significantly rises, thereby improve the ability of generator set on-load, the ability of particularly loading with asynchronous motor.
This electronic speed regulator also comprises communication circuit, and this communication circuit is connected with said microprocessor both-way communication.Communication circuit makes the user can browse, be provided with Control Parameter, the running state parameter of this speed regulator through upper-position unit.
Generator set prevision formula electronic speed regulation method uses above-mentioned generator set prevision formula electronic speed regulator, it is characterized in that, carries out as follows:
Step 1, said input circlult are transferred to microprocessor after in real time engine rotational speed signal and the generator set current sampling signal of input being handled;
Step 2, microprocessor carry out outputting a control signal to stepper motor driving circuit after the PID computing to the engine rotational speed signal of input; This stepper motor driving circuit is through stepper motor final controlling element control engine fuel delivery volume, and the control motor operates in rated speed;
Step 3, microprocessor are monitored the generator set current sampling signal in real time, judge the load condition of motor through monitoring this generator set current sampling signal;
When detecting generator sampling current amplitude of variation above setting value X; Microprocessor is adjusted parameter and the driving frequency of stepper motor driving circuit and the step angle of stepper motor actuator of PID on the one hand based on the rate of change of load current; The rated speed that changes setting on the other hand changes fuel supply volume through stepper motor driving circuit control step motor actuator at last to strengthen the control output quantity of microprocessor;
When the current changing rate that detects current sampling signal during less than setting value X; Microprocessor judges that load is stable state; Microprocessor is based on parameter and the driving frequency of stepper motor driving circuit and the step angle of stepper motor actuator of the size adjustment PID of load current, so that speed regulator control engine speed is recovered stable state;
After microprocessor changes the rated speed operation certain hour of speed regulator setting, the rotating speed of target of setting before recovering again.Delay time is generally all very short, and after the asynchronous motor of the big current start of needs started, promptly the may command engine speed was got back to original rated speed.Only need this moment engine running the electric operation desired power can be provided in original set rated speed.
When generator set current sampling signal electric current amplitude of variation surpassed setting value X, microprocessor improved the rated speed of setting or reduces by 1/5th.
The present invention has following advantage:
Electrically-actuated throttle device of the present invention and speed regulating method are when the asynchronous motor startup needs big electric current, improve the fuel delivery of motor in advance, stop engine speed significantly to reduce, thereby have improved the ability of generator set band asynchronous motor load.Thereby make low power generator set can drive the electric consumer of big starting power, avoided using powerful generator set to cause the increase of cost, and the waste of redundant power when having avoided using at ordinary times.
When load current significantly reduces; Speed regulator can just begin significantly to reduce fuel delivery before engine speed does not rise; Prevent that unloading the rotating speed that causes owing to load is prominent significantly rises, make output voltage frequency stable, improve the stability and the versatility of electrically-actuated throttle device.
When load current changes hour (like variance ratio in 6%); Microprocessor judges that load is steady state; Speed regulator can be adjusted parameter and the driver frequency of stepper motor driving circuit and the step angle of stepper motor final controlling element of PID accordingly, keeps steady state so that speed regulator can both be controlled engine speed under any load condition and operating mode.
The present invention can increase the engine fuel supply amount rapidly when the generator output current increases suddenly; Reach rapid increase engine output torque; And the generator set that need not the redundant moment of torsion of extra increase generator set is foreseen formula electronic speed regulator and speed regulating method thereof, thereby has practiced thrift the cost and the user cost of procuring equipment greatly.Same this speed regulator can be judged the load variations situation of motor through detecting the generator output current; No matter load impact, prominent unload, still stable; Can both come the parameter of adjustment regulator automatically according to the load condition of motor, remain on optimum state so that speed regulator can both be controlled the engine speed fluctuation ratio under any load condition.
Description of drawings
Fig. 1 is a schematic block circuit diagram of the present invention.
Embodiment
Below in conjunction with specific embodiment the present invention is done further explain.
The present invention changes the rotation speed change trend of coming the anticipation motor through detecting the generator set current sampling signal; Thereby reach and before engine speed change, begin control; To prevent that engine speed from fluctuating widely; Reach the ability that improves generator set band asynchronous motor load, final realization reduces user's user cost, reduces the purpose of material, energy consumption.Its concrete implementation is as shown in Figure 1; A kind of generator set prevision formula electronic speed regulator; Comprise speed probe, operation/IS Idle Switch, input circlult and microprocessor; This speed probe is connected with the input end of said input circlult respectively with operation/IS Idle Switch, and the output terminal of this input circlult is connected with the input end of said microprocessor, and the output terminal of this microprocessor is connected with the stepper motor final controlling element through stepper motor driving circuit; Also comprise the current sampling circuit that is used for the generator set current sampling, the output terminal of this current sampling circuit is connected with the input end of said input circlult.
Also comprise communication circuit, this communication circuit is connected with the microprocessor both-way communication.Power circuit is that electronic speed regulator of the present invention provides reliable and stable power supply.
Generator set prevision formula electronic speed regulation method uses above-mentioned generator set prevision formula electronic speed regulator, carries out as follows:
Step 1, said input circlult are transferred to microprocessor after in real time engine rotational speed signal and the generator set sampling current signal of input being handled;
Step 2, microprocessor carry out outputting a control signal to stepper motor driving circuit after the PID computing to the engine rotational speed signal of input; This stepper motor driving circuit is through stepper motor final controlling element control engine fuel delivery volume, and the control motor operates in rated speed;
Step 3, microprocessor are monitored the generator set current sampling signal in real time, judge the load condition of motor through monitoring this generator set current sampling signal;
Significantly change when detecting the generator sampling current suddenly; When amplitude of variation surpasses setting value X (generally speaking; The X value is 5%～6%); Microprocessor is adjusted parameter and the driver frequency of stepper motor driving circuit and the step angle of stepper motor final controlling element of PID on the one hand according to the variance ratio of load current, the rated speed that changes setting on the other hand is to strengthen the control output quantity of microprocessor, at last through stepper motor driving circuit control step motor final controlling element change fuel supply volume;
When the current changing rate that detects current sampling signal during less than setting value X; Microprocessor is adjusted parameter and the driving frequency of stepper motor driving circuit and the step angle of stepper motor actuator of PID on the one hand based on the size of load current, so that speed regulator control engine speed is recovered stable state;
The generator set current sampling signal significantly changes suddenly when surpassing setting value X, and microprocessor improves the rated speed of setting or reduces by 1/5th.
Working principle of the present invention: the tach signal that speed probe produces, after input circlult (input circlult is a plastic filter circuit) converts rectangular wave into, send into microprocessor; Microprocessor carries out exporting control signal after PID (PID) computing to tach signal; Control signal is the control actuator turns after drive circuit amplifies; The stepper motor actuator turns causes the variation of explosive motor fuel feed, thereby changes the rotating speed of explosive motor.More than these control procedures formed a closed loop control system.Operation/IS Idle Switch is used to switch the working state of generator set, and power circuit is that electronic speed regulator provides reliable and stable power supply.Communication circuit makes user's upper computer software of can communicating by letter browse, be provided with Control Parameter, the running state parameter of this speed regulator.
Speed regulator detects the variation of generator load electric current (generator set sampling current) in real time; Judge the load condition of motor through the size that detects the generator set sampling current; When detecting load current and significantly change suddenly (amplitude of variation can preestablish and revise), speed regulator is on the one hand according to parameter and the driver frequency of stepper motor driving circuit and the step angle of stepper motor driving circuit of the situation of change adjustment PID of load current; When load current increased suddenly, the target setting rotating speed of speed regulator was brought up to 1800 rev/mins or 3600 rev/mins from 1500 rev/mins or 3000 rev/mins on the other hand.And when load current reduced suddenly, the target setting rotating speed of speed regulator was reduced to 1200 rev/mins or 2400 rev/mins from 1500 rev/mins or 3000 rev/mins, returned to former rotating speed of target again after time-delay a period of time.
Through above-mentioned means, when load current significantly increased, speed regulator can just begin significantly to increase fuel supply before engine speed does not descend, and made the generator set motor have enough abilities to stop because the rotating speed that the load impact causes declines to a great extent; When should load current significantly reducing; Speed regulator can just begin significantly to reduce fuel supply before engine speed does not rise; Prevent because load is prominent unloads the rotating speed that causes and significantly rise, thereby improve the ability and the stability of generator set on-load, particularly with the ability of asynchronous motor.
In addition because the speed adjusting performance of motor under the different load situation has bigger difference, single speed regulator parameter can only be under fixing load condition the optimum of assurance motor frequency fluctuation rate.This speed regulator can be adjusted the driver frequency and driving step angle of the pid parameter and the stepper motor of speed regulator according to the size of load, thereby guarantees that generator set reaches optimum at the situation lower frequency fluctuation ratio of multiple load.
Illustrate: existing rated power is the generator set of 25KW, 3000 rev/mins of the rated speeds of the motor of generator set, and export the 50HZ Ac this moment, is used for supplying power to the family expenses consumer.The rated power of family expenses consumer is lower than 25KW, but the startup total output of family expenses consumer is 30KW.When starting consumer, starting power reaches 30KW, and the generator set output current significantly changes.But the rated power of generator set can not satisfy the inrush current demand.Microprocessor shifted to an earlier date control step motor final controlling element and strengthened fuel delivery this moment, improved the engine speed to 3600 rev/min of generator set, the Ac of output 60HZ.The Ac of 60HZ does not influence the normal use of electrical equipment.Motor is exported high-power drive generator set running, after appliance starting finishes, gets back in rated speed through the motor of stepper motor final controlling element control generator set.
This shows because the generator set electric current when significantly changing, is controlled motor in advance improves rotating speed or reduce rotating speed, stop the engine speed fluctuation, thereby improve the ability of generator set band asynchronous motor load.And make low power generator set can start the electric consumer of big starting power; Avoided using powerful generator set to cause the increase of cost; And the waste of redundant power has good use value when having avoided using at ordinary times, is convenient to promoting the use of of product.
The above embodiment of the present invention only be for explanation the present invention did for example, and be not to be qualification to mode of execution of the present invention.For the those of ordinary skill in affiliated field, can also make other multi-form variation and changes on the basis of the above description.Here can't give exhaustive to all mode of executions.Everyly belong to the row that conspicuous variation that technological scheme of the present invention amplifies out or change still are in protection scope of the present invention.
Claims (4)
1. a generator set is foreseen the formula electronic speed regulator; Comprise speed probe, operation/IS Idle Switch, input circlult and microprocessor; This speed probe is connected with the input end of said input circlult respectively with operation/IS Idle Switch; The output terminal of this input circlult is connected with the input end of said microprocessor, and the output terminal of this microprocessor is connected with the stepper motor final controlling element through stepper motor driving circuit, it is characterized in that; Also comprise the current sampling circuit that is used for the generator set current sampling, the output terminal of this current sampling circuit is connected with the input end of said input circlult.
2. generator set prevision formula electronic speed regulator according to claim 1 is characterized in that also comprise communication circuit, this communication circuit is connected with said microprocessor both-way communication.
3. generator set prevision formula electronic speed regulation method uses claim 1 or 2 described generator set prevision formula electronic speed regulators, it is characterized in that, carries out as follows:
Step 1, said input circlult are transferred to microprocessor after in real time engine rotational speed signal and the generator set current sampling signal of input being handled;
Step 2, microprocessor carry out outputting a control signal to stepper motor driving circuit after the PID computing to the engine rotational speed signal of input; This stepper motor driving circuit is through stepper motor final controlling element control engine fuel delivery volume, and the control motor operates in rated speed;
Step 3, microprocessor are monitored the generator set current sampling signal in real time, judge the load condition of motor through monitoring this generator set current sampling signal;
When the current changing rate that detects current sampling signal surpasses setting value X; Microprocessor is adjusted parameter and the driving frequency of stepper motor driving circuit and the step angle of stepper motor actuator of PID on the one hand based on the rate of change of load current; The rated speed that changes setting on the other hand changes fuel supply volume through stepper motor driving circuit control step motor actuator at last to strengthen the control output quantity of microprocessor;
When the current changing rate that detects current sampling signal during less than setting value X; Microprocessor judges that load is steady state; Microprocessor is according to parameter and the driver frequency of stepper motor driving circuit and the step angle of stepper motor final controlling element of the size adjustment PID of load current, so that speed regulator control engine speed is recovered steady state.
4. generator set prevision formula electronic speed regulation method according to claim 3 is characterized in that when generator set current sampling signal current changing rate surpassed setting value, microprocessor improved the rated speed of setting or reduces by 1/5th.
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| CN201210329272.7A CN102797566B (en) | 2012-09-07 | 2012-09-07 | Precognition type electronic speed regulator of generator set and speed regulating method thereof |
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| CN201210329272.7A CN102797566B (en) | 2012-09-07 | 2012-09-07 | Precognition type electronic speed regulator of generator set and speed regulating method thereof |
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| CN102797566A true CN102797566A (en) | 2012-11-28 |
| CN102797566B CN102797566B (en) | 2015-02-25 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109474217A (en) * | 2018-12-26 | 2019-03-15 | 帝麦克斯(苏州)医疗科技有限公司 | A kind of motor control method and device |
| CN109478832A (en) * | 2016-07-26 | 2019-03-15 | 三菱电机株式会社 | The diagnostic device of motor |
| CN112596374A (en) * | 2020-11-26 | 2021-04-02 | 中广核核电运营有限公司 | Adjusting performance optimization and state monitoring system and method of electronic speed regulator |
| CN117108405A (en) * | 2023-10-23 | 2023-11-24 | 潍柴动力股份有限公司 | Method, device, equipment and storage medium for regulating rotating speed of generator set |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1177524A1 (en) * | 1984-04-19 | 1985-09-07 | Mikhail S Zarkhin | Electronic governor of diesel-generator ratational sreed |
| DE20000126U1 (en) * | 2000-01-05 | 2000-05-11 | KRÄKU Maschinenbau- und Dienstleistungs GmbH, 56472 Großseifen | Edge deburring and chamfering machine with infinitely adjustable speed setting |
| CN200978728Y (en) * | 2006-10-17 | 2007-11-21 | 黄敬党 | Electronic speed-regulator for diesel engine |
| CN101694412A (en) * | 2009-10-19 | 2010-04-14 | 南京航空航天大学 | Air inlet passage dynamic pressure acquisition and tail cone control device |
| CN201730687U (en) * | 2010-06-29 | 2011-02-02 | 唐平 | Digital intelligent electronic speed regulator for engine |
-
2012
- 2012-09-07 CN CN201210329272.7A patent/CN102797566B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1177524A1 (en) * | 1984-04-19 | 1985-09-07 | Mikhail S Zarkhin | Electronic governor of diesel-generator ratational sreed |
| DE20000126U1 (en) * | 2000-01-05 | 2000-05-11 | KRÄKU Maschinenbau- und Dienstleistungs GmbH, 56472 Großseifen | Edge deburring and chamfering machine with infinitely adjustable speed setting |
| CN200978728Y (en) * | 2006-10-17 | 2007-11-21 | 黄敬党 | Electronic speed-regulator for diesel engine |
| CN101694412A (en) * | 2009-10-19 | 2010-04-14 | 南京航空航天大学 | Air inlet passage dynamic pressure acquisition and tail cone control device |
| CN201730687U (en) * | 2010-06-29 | 2011-02-02 | 唐平 | Digital intelligent electronic speed regulator for engine |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109478832A (en) * | 2016-07-26 | 2019-03-15 | 三菱电机株式会社 | The diagnostic device of motor |
| CN109478832B (en) * | 2016-07-26 | 2021-06-18 | 三菱电机株式会社 | Diagnostic device for motor |
| CN109474217A (en) * | 2018-12-26 | 2019-03-15 | 帝麦克斯(苏州)医疗科技有限公司 | A kind of motor control method and device |
| CN112596374A (en) * | 2020-11-26 | 2021-04-02 | 中广核核电运营有限公司 | Adjusting performance optimization and state monitoring system and method of electronic speed regulator |
| CN117108405A (en) * | 2023-10-23 | 2023-11-24 | 潍柴动力股份有限公司 | Method, device, equipment and storage medium for regulating rotating speed of generator set |
| CN117108405B (en) * | 2023-10-23 | 2024-01-16 | 潍柴动力股份有限公司 | Method, device, equipment and storage medium for regulating rotating speed of generator set |
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