A kind of distance increasing unit power output control system and its methodTechnical field
The present invention relates to electric automobile distance increasing unit control and in particular to a kind of distance increasing unit power output control system and itsMethod.
Background technology
Distance increasing unit is the generating equipment for extending electric automobile continual mileage being applied to stroke-increasing electric automobile, in electricityWhen motor-car needs to charge, distance increasing unit starts, and engine driven generators generate electricity, and its generated output determines according to car load demand.
It is currently used in power output on stroke-increasing electric automobile and controls and mainly pass through the fixing single-point of design or severalThe change of individual single-point generating operation mode control realization power controls, and typical distance increasing unit power output control method is as shown in Figure 1.CanTo find out, generated output is in that phase step type changes, but the generated output demand in actual travel for the car load is continually varying, stepThe power output of formula makes distance increasing unit cannot follow demand power change requirement it is impossible to precise control generated output exports；And adjustCan impact during section, produce generation current pulse, vibration noise is big, the ride comfort of impact car load.
Content of the invention
In view of this, the present invention provides a kind of distance increasing unit power output control system and its method, and purport realizes distance increasing unit work(Rate output flexible, be accurately controlled.
The technical solution used in the present invention particularly as follows:
A kind of distance increasing unit power output control system, including distance increasing unit and distance increasing unit controller, distance increasing unit includes engineAnd generator, described engine and described generator pass through to be mechanically connected；Distance increasing unit and distance increasing unit controller phase are come round news；ItsIn: distance increasing unit includes to the input quantity of distance increasing unit controller: engine speed, the voltage of generator and current signal；Increase journeyDevice controller includes to the output quantity of distance increasing unit: the distributive value of engine and the angle of ignition, throttle opening, the torque letter of generatorNumber.
A kind of distance increasing unit power output control method, including the control to engine speed, the control to generator torqueWith the power adjusting to distance increasing unit, wherein:
To concretely comprising the following steps of the control of engine speed:
Car load inputs demand power to distance increasing unit, and distance increasing unit calculates the rotating speed of target of engine by demand power, calculatesSpeed discrepancy between the current rotating speed of the rotating speed of target of engine and the engine collecting, is adjusted by current rotating speed and speed discrepancyThe throttle opening of section engine, distributive value and the angle of ignition, make current rotating speed close to rotating speed of target；
To concretely comprising the following steps of the control of generator torque:
Calculate the target torque of generator by demand power；
The voltage and current of generator output is filtered processing, and is worth according to the voltage and current after filtering processReal output to distance increasing unit；The demand power of distance increasing unit and the difference of real output are multiplied by correction factor to be sent outThe moment of torsion correction value of motor；
Target torque and torque modification value sum export the actual torque of generator；
To concretely comprising the following steps of the power adjusting of distance increasing unit:
When the real output difference of demand power and distance increasing unit is larger, expression power demand is Spline smoothing, thenWith the target torque of first gradient Level tune generator and torque modification value；
When the real output difference of demand power and distance increasing unit is less, represent that power demand is continuously slowly to becomeChange, then with the target torque of second graded levels' regulator generator and torque modification value.
In above-mentioned distance increasing unit power output control method, the scope of described correction factor is 0-5.
In above-mentioned distance increasing unit power output control method, described first gradient level particularly as follows:
Regulating gradient to described target torque is 8-15nm/100ms, and the regulating gradient to described torque modification value is 0-5nm/100ms.
In above-mentioned distance increasing unit power output control method, described first gradient level particularly as follows:
Regulating gradient to described target torque is 10nm/100ms, and the regulating gradient to described torque modification value is 5nm/100ms.
In above-mentioned distance increasing unit power output control method, described second graded levels particularly as follows:
Regulating gradient 3-7nm/100ms to described target torque, the regulating gradient to described torque modification value is 0-2nm/100ms.
In above-mentioned distance increasing unit power output control method, described first gradient level particularly as follows:
Regulating gradient 5nm/100ms to described target torque, the regulating gradient to described torque modification value is 2nm/100ms.
The beneficial effect comprise that:
The distance increasing unit power output control method of the present invention is passed through to coordinate to control engine speed and generator torque output,The continuous output of distance increasing unit power can be realized simultaneously and step output is carried out closed loop and adjusted and controls, meet car load to distance increasing unitPower demand, rotating speed steadily, no torque shock ends, generation current output impact, it is to avoid electrokinetic cell is caused with input impact, separatelyOuter pass through using power output closed-loop control it is achieved that the precise control of power output.
Brief description
When considered in conjunction with the accompanying drawings, the present invention can more completely be more fully understood.Accompanying drawing described herein is used for providingA further understanding of the present invention, embodiment and its illustrate, for explaining the present invention, not constituting inappropriate limitation of the present invention.
Fig. 1 is the schematic diagram of typical distance increasing unit power output control method；
Fig. 2 is a kind of structural representation of present invention distance increasing unit power output control system；
Fig. 3 is a kind of flow chart of present invention distance increasing unit power output control method.
In figure: 1, engine 2, generator 3, distance increasing unit controller.
Specific embodiment
Below in conjunction with the accompanying drawings and embodiment is described in further detail to technical scheme.
, as shown in Fig. 2 including distance increasing unit and distance increasing unit controller 3, distance increasing unit is by sending out for distance increasing unit power output control systemMotivation 1 and generator 2 consist of mechanical connection, and distance increasing unit is connected with distance increasing unit controller 3, and distance increasing unit is to distance increasing unit controlThe input quantity of device 3 includes: engine speed, the voltage of generator and current signal；Distance increasing unit controller 3 is defeated to distance increasing unitOutput includes: the distributive value of engine and the angle of ignition, throttle opening, the dtc signal of generator.
The control method of above-mentioned distance increasing unit power output control system is as shown in figure 3, specifically include to engine speedControl, the control to generator torque and the power adjusting to distance increasing unit, wherein:
To concretely comprising the following steps of the control of engine speed:
Car load calculates the rotating speed of target of engine to distance increasing unit input power demand, distance increasing unit by demand power, calculatesSpeed discrepancy between the current rotating speed of the rotating speed of target of engine and the engine collecting, is adjusted by current rotating speed and speed discrepancyThe throttle opening of section engine, distributive value and the angle of ignition, make current rotating speed close to rotating speed of target；
To concretely comprising the following steps of the control of generator torque:
Calculate the target torque of generator by demand power；
The voltage and current of generator output is filtered processing, and is worth according to the voltage and current after filtering processTo the power output of generator, the i.e. real output of distance increasing unit；The demand power of distance increasing unit and the difference of real outputValue is multiplied by the moment of torsion correction value that certain correction factor obtains generator；Wherein, this correction factor turns according to current engineZoom table obtains, and based on substantial amounts of experiment test, the scope of correction factor is usually set between 0-5.
Target torque and torque modification value sum export the actual torque of generator it is achieved that torque to generatorInput；
To concretely comprising the following steps of the power adjusting of distance increasing unit:
When the real output difference of demand power and distance increasing unit is larger, expression power demand is Spline smoothing, thenQuickly (regulating gradient of target torque is 8-15nm/100ms, preferably 10nm/100ms；The regulating gradient of torque modification value is0-5nm/100ms, preferably 5nm/100ms.) target torque of regulator generator and torque modification value, suppress engine speedThe fluctuation of speed, with adapt to distance increasing unit demand power Spline smoothing control；
When the real output difference of demand power and distance increasing unit is less, represent that power demand is continuously slowly to becomeChange, then slow (regulating gradient of target torque is 3-7nm/100ms, preferably 5nm/100ms；The regulation ladder of torque modification valueSpend for 0-2nm/100ms, preferably 2nm/100ms.) target torque of regulator generator and torque modification value, to adapt to increase journeyDevice demand power continuously slowly controls, and realizes the consecutive variations model- following control of power output.
As long as described above, embodiments of the invention have been carried out explaining it is clear that essentially without depart from thisBright inventive point and effect, will be readily apparent to persons skilled in the art deformation, is also all contained in the guarantor of the present inventionWithin the scope of shield.