The multiplexing method of stroke-increasing electric automobile electric machine controller functionTechnical field
The present invention relates to a kind of multiplexing methods of stroke-increasing electric automobile electric machine controller function.
Background technique
The dynamical system of stroke-increasing electric automobile is mainly made of power battery, traction electric machine system and distance increasing unit unit,Power battery provides traction electric machine electrical source of power by traction motor controller and drives vehicle driving, when power battery electricity notWhen sufficient, the power generation of distance increasing unit unit starting is power battery charging.General distance increasing unit unit is by engine and integrated starting generatorIt constitutes.Under normal mode of operation, engine controller controls engine start, and the operation of driven by engine generator generates electricity and to dynamicThe charging of power battery；Traction motor controller control traction electric machine runs and drives vehicle driving.Two electric machine controller functions withoutMethod multiplexing, when traction motor controller failure, vehicle will cast anchor, and can only be parked in original place and wait for rescue；And when power battery electricityMeasure it is very low, engine controller break down, distance increasing unit unit can not be power battery charging when, power battery not enough power supply withVehicle is set to open go back to maintenance station with electric-only mode, such vehicle can only also be parked in original place and wait for rescue.Therefore due to traction electric machineIt can not be multiplexed between controller and engine controller, once traction motor controller and engine controller failure or powerBattery capacity is low, all will lead to vehicle and casts anchor, and affects the normally travel of vehicle.
Summary of the invention
Technical problem to be solved by the invention is to provide a kind of multiplexings of stroke-increasing electric automobile electric machine controller functionMethod, for this method under some electric machine controller fault condition of vehicle, engine controller and traction motor controller take oneIt sets down measures, realizes multiplexing functions, open go back to maintenance station so as to enable the vehicle to walk lamely, realize saving oneself for vehicle.
In order to solve the above technical problems, the multiplexing method of stroke-increasing electric automobile electric machine controller function of the present invention, increases journeyIn formula electric car, engine controller controls engine operation, engine driven generators work and to power battery charging,Traction motor controller controls traction electric machine and drives vehicle driving, and power battery passes through main relay respectively and connects generator controlDevice and traction motor controller, entire car controller by CAN bus respectively with engine controller, traction motor controller and dynamicPower battery carries out information exchange and control；This method includes the following steps:
Step 1: disconnecting the three-phase power line between engine controller and generator when engine controller failureAnd signal wire, the three-phase power line and signal wire between traction motor controller and traction electric machine are disconnected, will be sent out using patchcordMotor three-phase power line and signal wire are connected to traction motor controller；
Step 2: closing traction control mode input signal switch, traction motor controller receives traction control mode and closesGeneration Control strategy is switched to after closing signal, while entire car controller is adjusted to traction motor controller Generation Control strategy；
Step 3: being powered on by vehicle control unit controls vehicle high-pressure system, engine controller is connect with power batteryMain relay disconnects, and traction motor controller control high pressure powers on；
Step 4: entire car controller sends work order, traction electric machine control to traction motor controller by CAN busDevice controls engine start, engine driven generators operation and to power battery charging；
Step 5: after entire car controller detects power battery charging, by CAN bus to traction motor controllerIt issues and stops engine operation instruction, and traction motor controller control high pressure power-off；
Step 6: disconnecting the patchcord between generator three-phase power line and signal wire and traction motor controller, and willTraction electric machine three-phase power line and signal wire take back traction motor controller, while opening traction control mode input signal and openingIt closes, vehicle control unit controls system re-powers, and provides power supply by power battery, traction motor controller controls traction electric machine and drivesDynamic vehicle driving；
Step 7: disconnecting the three-phase power between engine controller and generator when traction motor controller failureLine and signal wire disconnect three-phase power line and signal wire between traction motor controller and traction electric machine, will using patchcordTraction electric machine three-phase power line and signal wire are connected to engine controller；
Step 8: closing Generation Control mode input signal switch, engine controller receives Generation Control mode and closesTraction electric machine drive control strategy is switched to after signal, while entire car controller is adjusted to engine controller drive control planSlightly；
Step 9: being powered on by vehicle control unit controls vehicle high-pressure system, traction motor controller is connect with power batteryMain relay disconnect, engine controller control high pressure power on；
Step 10: entire car controller sends work order, engine controller limit to engine controller by CAN busThe output power of traction electric machine processed simultaneously controls traction electric machine operation, and traction electric machine drives vehicle driving with electric-only mode.
Since the multiplexing method of stroke-increasing electric automobile electric machine controller function of the present invention uses above-mentioned technical proposal, i.e.,This method by engine controller and traction electric machine or is led under engine controller or traction motor controller fault conditionDraw the switching of electric machine controller and generator, and realizes engine controller and traction electricity after entire car controller is controlled accordinglyThe multiplexing of machine controller increases a kind of fault condition to realize the emergency processing strategy in the case of a certain controller failureUnder vehicle limping operating mode, so as to enable the vehicle to walk lamely open go back to maintenance station, realize saving oneself for vehicle.This method is simpleReliably, treatment measures are taken from control strategy, without a large amount of change vehicle configurations, increase hardware device, and easy to implement, nothingExtra cost need to be increased, vehicle is avoided to cast anchor caused traffic jam.
Detailed description of the invention
The present invention will be further described in detail below with reference to the accompanying drawings and embodiments:
Traction motor controller controls generator operation mode signal when Fig. 1 is engine controller failure in this methodFigure；
Engine controller controls the signal of traction electric machine operating mode when Fig. 2 is traction motor controller failure in this methodFigure.
Specific embodiment
Embodiment is as depicted in figs. 1 and 2, the multiplexing method of stroke-increasing electric automobile electric machine controller function of the present invention, increasesIn formula electric car, engine controller 1 controls engine 4 and runs, and 4 driven generator 3 of engine works and to power electricPond 6 is charged, and traction motor controller 2 controls traction electric machine 5 and vehicle 8 is driven to travel, and power battery 6 is connected by main relay respectivelySending and receiving electric machine controller 1 and traction motor controller 2, entire car controller 7 by CAN bus respectively with engine controller 1, leadDraw electric machine controller 2 and power battery 6 carries out information exchange and control；This method includes the following steps:
Step 1: disconnecting the three-phase power between engine controller 1 and generator 3 when 1 failure of engine controllerLine and signal wire disconnect three-phase power line and signal wire between traction motor controller 2 and traction electric machine 5, using patchcord 93 three-phase power line of generator and signal wire are connected to traction motor controller 2；
Step 2: closing traction control mode input signal switch 71, traction motor controller 2 receives traction control modeGeneration Control strategy is switched to after shutdown signal, while entire car controller 7 is adjusted to traction motor controller Generation Control strategy；
It is powered on Step 3: controlling vehicle high-pressure system by entire car controller 7, engine controller 1 is connect with power battery 6Main relay disconnect, traction motor controller 2 control high pressure power on；
Step 4: entire car controller 7 sends work order, traction electric machine control to traction motor controller 2 by CAN busDevice 2 processed controls engine 4 and starts, and 4 driven generator 3 of engine runs and charges to power battery 6；
Step 5: being controlled by CAN bus to traction electric machine after entire car controller 7 detects that power battery 6 chargesDevice 2, which issues, stops 4 work order of engine, and traction motor controller 2 controls high pressure power-off；
Step 6: the patchcord 9 between 3 three-phase power line of generator and signal wire and traction motor controller 2 is disconnected, and5 three-phase power line of traction electric machine and signal wire are taken back into traction motor controller 2, while opening traction control mode input signalSwitch 71,7 control system of entire car controller re-power, and provide power supply by power battery 6, the control of traction motor controller 2 is ledDrawing motor 5 drives vehicle 8 to travel；
Step 7: the three-phase disconnected between engine controller 1 and generator 3 is dynamic when 2 failure of traction motor controllerThe line of force and signal wire disconnect three-phase power line and signal wire between traction motor controller 2 and traction electric machine 5, using switching5 three-phase power line of traction electric machine and signal wire are connected to engine controller 1 by line 9；
Step 8: closing Generation Control mode input signal switch 72, engine controller 1 receives Generation Control mode and closesTraction electric machine drive control strategy is switched to after closing signal, while entire car controller 7 is adjusted to engine controller drive controlStrategy；
It is powered on Step 9: controlling vehicle high-pressure system by entire car controller 7, traction motor controller 2 and power battery 6 connectThe main relay connect disconnects, and engine controller 1 controls high pressure and powers on；
Step 10: entire car controller 7 sends work order, engine controller to engine controller 1 by CAN busThe output power of 1 limitation traction electric machine 5 simultaneously controls the operation of traction electric machine 5, and traction electric machine 5 drives 8 row of vehicle with electric-only modeIt sails.
The vehicle that present method solves stroke-increasing electric automobiles in the case of some controller failure casts anchor problem, in vehicleOn the basis of existing configuration, takes certain measure to make two controller function multiplexings, realize saving oneself for vehicle.Stroke-increasing electric automobileIn, engine controller and traction motor controller be in functional structure it is identical, only may be different on power output capacity,Therefore when a certain controller failure, another controller multiplexing failed controller is can be used in two controllers functionally reusableFunction, so that vehicle be avoided to cast anchor.
Engine controller and the switching of traction motor controller control function and implementation carry out in the following two cases:
1) when traction motor controller breaks down, after power battery electricity is sufficient, engine controller, which is switched to, to be ledDraw motor limping control model, vehicle is travelled with electric-only mode, to open back maintenance station maintenance；
2) when engine controller failure, distance increasing unit unit cannot generate electricity and battery capacity is insufficient, traction electric machine controlDevice is switched to Generation Control mode, controls electrical power generators, supplements electricity for power battery, after electricity is supplied, then will tractionMotor takes back traction motor controller, and vehicle is travelled again with electric-only mode, to open back maintenance station maintenance.
This method makes full use of the functional characteristics of two controllers, using simple treatment measures, to realize when a certainEmergency processing strategy in the case of controller failure increases the vehicle limping operating mode under a kind of fault condition, realizes at certainVehicle in the case of one controller failure is saved oneself, and caused traffic jam of casting anchor is avoided；This method is simple and reliable, from control strategyOn take treatment measures, it is easy to implement without a large amount of change vehicle configurations, without increasing extra cost.