CN107834778A

CN107834778A - The automobile using starter-generator and its method of work of controller control

Info

Publication number: CN107834778A
Application number: CN201711159536.8A
Authority: CN
Inventors: 不公告发明人
Original assignee: Individual
Current assignee: Individual
Priority date: 2015-08-24
Filing date: 2015-08-24
Publication date: 2018-03-23
Also published as: CN105099302A; CN105099302B; CN107834720A; CN107947314A; CN107733173A; CN107834777A; CN107834719A

Abstract

The invention provides the automobile using starter-generator and its method of work of a kind of controller control.Starter-generator of the present invention employs non-permanent magnet and rotor structure and the stator structure of polyphase windings without winding, the starter-generator with electric model and power generation mode is realized in synchronous Precision switch control based on controller to each phase winding, and initial start, a variety of working conditions of stable power-assisted state and generating etc. can be achieved.As a result of the winding control technology of the whole stepwise adjustable section of electric model and power generation mode, the power output under two kinds of mode of operations can be effectively controlled, efficiently solves starting process and the unmatched problem of power generation process power among prior art.

Description

The automobile using starter-generator and its method of work of controller control

Technical field

The present invention relates to automotive engineering, automobile using starter-generator more particularly, to a kind of control of controller and its Method of work.

Background technology

Based on fuel economy, many factors such as noxious gas emission and industry large-scale application cost are reduced, mixing is dynamic Power automobile turns into the developing direction of current new auto technology, and industry is believed will substitute traditional power within the following not long time Automobile and turn into the mainstream product in the market.

Hybrid vehicle possesses fuel engines and electronic-two groups of generator power source, by it is intelligentized control and Output distribution, electronic-generator can overcome engine as the starter of fuel engines during initial start Drag torque, engine is set to reach enough starting speed；Electronic after starting-generator can be optionally fuel engines Auxiliary power is provided, engine can also be completely closed under appropriate state, provides power by motor generator merely.Separately Outside, motor generator has the invertibity of energy conversion, you can with reverse transformation of the realization from mechanical energy to electric energy, therefore The mechanical energy of engine can be generated electric energy in car deceleration braking procedure, be stored in by inverter in automobile storage battery. Therefore, motor generator system is generally referred to as starter-generator in hybrid vehicle.

Engine is mixed with the power coupling mode of starter-generator including twin shaft belt transmission power and single shaft moment of torsion It is superimposed power mixing.In twin shaft belt transmission power hybrid mode, starter-generator is realized with engine by belt transmission Twin shaft is in parallel.Engine can realize that engine quickly starts as vehicle power source, starter-generator.Therefore, automobile is being transported The various situations for needing waiting are run into during row, engine can close, and the oil consumption of down periods, waste gas, noise are all It can minimize；And when needing to start once again, starter-generator system makes engine by shutting down to reaching more than idling It is only hundreds of milliseconds during dynamic；In addition, in car deceleration braking procedure, starter-generator utilizes the mechanical energy of engine output Realize to electric power storage.The mixing of twin shaft belt transmission power is restricted by Belt Transmission Efficiency, and the power ratio of power driven system is relatively low, and And performance exists unstable, gradually be able to will be substituted by more advanced technology.Single shaft moment of torsion superposition power hybrid mode will be sent out The moment of torsion of motivation and power driven system is directly superimposed, and can realize that the operating mode of engine and power driven system diversified forms is compound. In initial start, power driven system provides initial moment to make engine rapidly enter working condition for engine；Driving a vehicle During acceleration, power driven system realizes power-assisted, makes up engine torque deficiency；During retarding braking, power driven system realizes energy Recovery, charges to battery；Engine is closed under dead ship condition, reduces discharge and oil consumption.Single shaft moment of torsion is superimposed power Hybrid mode is the most perfect hybrid power solution of current combination property, has wide development space.

In the prior art, there are a variety of implementations in single shaft moment of torsion superposition power hybrid mode, and Fig. 1 is state-of-the art Series-parallel connection mode the most advanced, as shown in figure 1, hybrid power system includes engine, starter-generator, clutch, power train System, battery and Comprehensive Control unit.Wherein, starter-generator is used to start engine, and the output of engine is changed It is electric energy so as to be charged to battery；Starter-generator and engine are under the coordination of Comprehensive Control unit with different dynamic modes Operation, including the electric model travelled completely using electronic output power, using the output of engine as major impetus simultaneously And with the mixed dynamic model formula of electronic offer auxiliary power, and recovered energy simultaneously by starter-generator in brake and braking procedure Regeneration mode to be charged to battery etc..Wherein engine, starter-generator and clutch coaxial installation, are answered by single shaft moment of torsion Conjunction forms hybrid power.

It is superimposed in single shaft moment of torsion in power hybrid mode, starter-generator is directly integrated on the main shaft of engine.Typically Using desk permanent-magnet body synchronous initiation generator.Permanent-magnet synchronous starter-generator includes carrying the rotor of permanent magnet and carried The stator of coil windings；Wherein rotor is integrated on the main shaft of engine, and stator is typically secured to the supporting of motor body In supporting construction.In starting process, rotor is driven to rotate by the winding excitation of stator；And in power generation process, rotor Flux interaction realize generating in the winding of stator.

Permanent-magnet synchronous starter-generator volume and quality are smaller, using the teaching of the invention it is possible to provide big starting torque, there is high generation efficiency, Operational reliability is good.But its major defect, which is due to rotor, employs permanent magnet, cause its caused magnetic flux unadjustable. And there is very big difference, the former magnetic flux in magnetic flux of the starter-generator in both starting process and power generation process needed for Significantly greater than the latter., will be because in generator operation thus for the rotor magnetic flux for meeting the needs of starting process and setting Magnetic flux is too high and produces too high power and voltage output.In order to tackle this case, now have to use energy in the art Output of the circuit for power conversion enough worked under high pressure conditions to starter-generator is adjusted.Another kind of the prior art Solution is the exploitation adjustable permanent-magnet synchronous starter-generator of magnetic flux, and the solution is produced in PM rotor Magnetic flux on superposition adjustable magnetic flux as caused by the coil windings of rotor, so as in starting process and power generation process Using different magnetic flux, but this solution significantly improves rotor construction complexity, is needed in rotor design processing The influence factor of consideration is excessive, equally adds the cost of equipment, and reduces energy efficiency.

The content of the invention

According to drawbacks described above of the prior art, the invention provides a kind of starter-generator improved structure.Institute of the present invention The starter-generator stated employs non-permanent magnet and rotor structure and the stator structure of polyphase windings without winding, based on control The starter-generator with electric model and power generation mode is realized in synchronous Precision switch control of the device to each phase winding, can be achieved just Begin starting, a variety of working conditions of stable power-assisted state and generating etc..It is whole as a result of electric model and power generation mode The winding control technology of stepwise adjustable section, the power output under two kinds of mode of operations can be effectively controlled, is efficiently solved existing Starting process and the unmatched problem of power generation process power among technology.

Starter-generator improved structure of the present invention, it is characterised in that including：Main motor, power inverter, sensing Module, controller；The main motor includes stator and rotor, both at the salient-pole structure of non-permanent magnet；The stator includes Polyphase windings, each of which phase winding are made up of a pair of winding coils on the salient pole diametrically of stator；

The power inverter is that two windings in each phase on stator provide one by main switch and afterflow two respectively The on-off circuit that level pipe is formed；

The sensing module is used for the state parameter for detecting polymorphic type；

The controller is used to be based on the state parameter, controls the switching between the multiple working conditions of starter-generator, and Under each working condition by power inverter in the control of state that switches on and off of each main switch, determine each phase The running status of winding and execution protection control；

Wherein, multiple working conditions of the starter-generator include initial start up state, stable power-assisted state and generating shape State, engine speed parameter, battery system state parameter and the throttle that the controller provides according to sensing module Parameter, determine the current operating state of starter-generator；

Also, the controller determines to control the control of the state of each main switch in power inverter under current operating state Mode processed.

Preferably, the controller judges whether rotor speed reaches predetermined engine idle rotational, if do not reached It is initial start up state to then determination current operating state；If rotor speed reaches predetermined engine idle rotational, described Controller is based on battery system state parameter, and judging that battery system is in allows power-assisted scope still to allow generation range； In the permission power-assisted scope, controller judges whether in throttle on earth, in throttle according to the throttle parameter The stable power-assisted state of starting-generating incision is controlled under state on earth, otherwise remains shut off standby mode；Allow generating model described Enclose, controller judges whether in throttle on earth, to control under throttle on earth state non-according to the throttle parameter Starter-generator enters generating state, and standby mode is shut down controlling starter-generator to enter under throttle on earth state.

Preferably, the controller is according to each in turn-on angle, shut-off angle and current chopping threshold value control power inverter The state of individual main switch, any phase winding of the stator relative to rotor axis angle turn-on angle and shut-off angle it Between, main switch conducting corresponding with the phase winding in controller control power inverter；And controller according to phase current or Whether reach current chopping threshold value, control main switch conducting corresponding with the phase winding in power inverter and disconnect.

Preferably, under the initial start up state, the controller determines that the control mode is current chopping control Mode processed；In Current cut control mode, when the angle of rotor axis is between turn-on angle and shut-off angle, controller judges Whether phase current is more than or equal to phase current copped wave threshold value, when phase current is in the state more than or equal to phase current copped wave threshold value When lower, then controller controls main switch corresponding with the phase winding in switch-off power converter.

Preferably, in the case where stablizing power-assisted state, the controller determines that the control mode exists according to the rotating speed of rotor Switch between Current cut control mode and Angle-domain imaging mode；When the rotating speed of rotor switches threshold less than Electronic control mode During value, controller determines to use Current cut control mode；In Current cut control mode, opened in the angle of rotor axis When between current flow angle and shut-off angle, controller judges whether phase current is more than or equal to phase current copped wave threshold value, when phase current is in It is during more than or equal in the state of phase current copped wave threshold value, then corresponding with the phase winding in controller control switch-off power converter Main switch；When the rotating speed of rotor is higher than Electronic control mode switching threshold, controller determines to use Angle-domain imaging Mode；In Angle-domain imaging mode, controller adjusts the turn-on angle and shut-off angle according to rotating speed and battery tension.

Preferably, in generate mode, the controller determines that the control mode is cut in electric current according to rotor speed Switch between ripple and angle control complex controll mode and Angle-domain imaging mode；When the rotating speed of rotor is less than Generation Control During mode switching threshold, controller is determined using current chopping and angle control complex controll mode；In current chopping and angle Control in complex controll mode, controller adjusts the turn-on angle and shut-off angle, and controller according to rotating speed and output voltage Judge whether exciting current is more than or equal to exciting current copped wave threshold value；Cut when exciting current is in more than or equal to exciting current When in the state of ripple threshold value, then controller controls main switch corresponding with the phase winding in switch-off power converter；Work as rotor Rotating speed when being higher than Generation Control mode switching threshold, controller determines to use Angle-domain imaging mode；In the angle position To put in control mode, controller chooses fixed optimization according to power output and turns off angle, and according to rotating speed and power output Adjust turn-on angle.

Preferably, the sensing module includes：Location sensitive module, for detect stator among main motor it is each mutually around Group relative to rotor axis angle；Throttle position switch, for providing throttle position signal, obtain the oil in driver behavior Gate-shaped state property；Phase current sensor, the current signal of each phase winding for detecting main motor stator；And storage battery Pressure sensor, for detecting input and the output voltage signal of battery；Accumulator current sensor, for detecting battery Input and output current signal.

Preferably, the location sensitive module is optical position sensitive switch, and the optical position sensitive switch includes Fluted disc and optical sensor, the sensor are fixed on the casing of main motor, and the fluted disc is installed with rotor coaxial, described Teeth Number is identical with the salient pole number of rotor.

Preferably, the location sensitive module is phase inductance induction installation, including with each phase winding of stator with around ground Inductance measurement coil is set, rotor-position is detected according to the inductance value of the inductance measurement coil.

Preferably, the controller includes：Speed detection unit, for the rotor position detected according to location sensitive module Put the rotating speed for judging main motor；Position solving unit, for resolving the position of rotor according to the testing result of location sensitive module； Throttle detection unit, for determining the throttle under current driving performance according to the signal of throttle position switch；Phase current Detection unit, for the signal provided according to phase current sensor, determine the phase current state of each phase winding of main motor；Voltage model Enclose signal extraction voltage range of the detection unit according to storage battery pressure sensor；Control unit, according to testing result generate to The drive signal of power inverter output, so as to control what is respectively mutually switched in power inverter to turn on and off.

It can be seen that the present invention substitutes existing permanent-magnet synchronous starter-generator, non-permanent magnet and the rotor without winding are employed The stator structure of structure and polyphase windings, the synchronous Precision switch control based on controller to each phase winding are realized with electronic The starter-generator of pattern and power generation mode, initial start, a variety of working conditions of stable power-assisted state and generating etc. can be achieved. Due to instead of uncontrollable PM rotor, and employ the winding of the whole stepwise adjustable section of electric model and power generation mode Control technology, the power output under two kinds of mode of operations can be effectively controlled, efficiently solves starting process among prior art With the unmatched problem of power generation process power, also, the present invention be directed to starter-generator different conditions under rotating speed, storage battery The operational factor such as stream and voltage, throttle position, there is provided the timesharing Compound Control Strategy under multimode and control mode, makes system Being optimal of efficiency, and solve by mapping mechanism the nonlinear problem in control process.Realized by the present invention Hybrid power automobile start-up energy production machine improved structure, there is many advantages, show as：The not additional winding of rotor and permanent magnetism Body, mechanical structure is simple, manufacture easy to process；Each phase winding of stator physically and is electromagnetically isolated from each other, and reduces alternate The probability of failure, there is higher fault-tolerant ability；Because the winding of stator is directly connected to power inverter, starter-generator is not required to Adding excessive peripheral circuit can realize that bidirectional energy transmits；Larger starting torque can be reached, and in low speed Ideal performance can be reached by compound control mode under the conditions of operation and high-speed cruising.It is real by the structure institute of the present invention Existing starter-generator integrated level is high, realizes accurate control, volume and weight is smaller, possesses wide application prospect.

Brief description of the drawings

The present invention is further detailed explanation with reference to the accompanying drawings and detailed description：

Fig. 1 is mixed power system structure schematic diagram of the prior art；

Fig. 2 is the starter-generator overall structure diagram of the embodiment of the present invention；

Fig. 3 is the main motor stator, rotor and winding construction schematic diagram of the embodiment of the present invention；

Fig. 4 is the main motor operation principle schematic diagram of the embodiment of the present invention；

Fig. 5 is the sensing module and controller architecture schematic diagram of the embodiment of the present invention；

Fig. 6, Fig. 7, Fig. 8 are the starter-generator working condition switching flow figures of the embodiment of the present invention.

Embodiment

In order that those skilled in the art will better understand the technical solution of the present invention, and make the present invention above-mentioned mesh , feature and advantage can be more obvious understandable, the present invention is made with reference to embodiment and embodiment accompanying drawing further detailed Explanation.

Fig. 2 is the starter-generator overall structure diagram of the embodiment of the present invention.The starter-generator includes main motor 1st, power inverter 2, sensing module 3, controller 4.

Main motor is the part for being used to realize mechanical energy and the bi-directional conversion of electric energy collectively constituted by stator and rotor, its The main shaft of the fuel engines of hybrid vehicle is integrated into, realizes that power mixes in a manner of above-mentioned single shaft moment of torsion is superimposed. In starting process, main motor to engine output torque, and engine complete to play and after reaching more than desired speed, main electricity Machine enters power generation process, produces the electric energy for being delivered to battery.The coil windings of power inverter connection main motor and mixing The battery system of power vehicle, when starter-generator is as motive power outputting apparatus, power inverter uses battery system The energy of offer is fed to main motor, on the contrary, when starter-generator enters power generation process, power inverter will produce in main motor Raw energy back is to battery system.Controller is entered by the conducting to switch block among power inverter and off-state Row regulation, control main motor time-sharing work provide equipment protection function, controller in the starting process and power generation process It is the maincenter unit of starter-generator.The function of controller, which is realized, to be needed by each of sensing module detection starter-generator operation Type state parameter, corresponding regulation operation is performed on the basis of state parameter.

The structure of main motor, both at salient-pole structure, can lead to as shown in figure 3, including having stator 101 and rotor 102 Cross the salient pole that silicon steel plate stacking forms stator and rotor.The non-permanent magnet material of rotor 102 makes, and without winding.Stator 101 include polyphase windings, and each of which phase winding is by a pair of winding coil strings on the salient pole diametrically of stator 101 Connection or composition in parallel.The number of phases that stator 101 includes can at most reduce torque pulsation, but the number of phases can also make circuit structure more It is increasingly complex and increase in power inverter opening and device.Therefore, as shown in figure 3, stator 101 is using the pole of six phase 12/10 Structure, the pole structure of six phase 12/10 can support two-phase/three-phase mixes to start, be increased using start mode more than two-phase and two-phase Load capacity in big starter-generator starting process, thus there is more preferable starting performance.

Main motor can be found in Fig. 4 in the operation principle of starting process and be explained.For simplicity, Fig. 4 with stator 101 its In exemplified by a phase winding, show the phase winding and corresponding power converter circuit structure.When the footpath of the B phase windings in Fig. 4 When being overlapped to axis with rotor pole axis, first switch S1 and second switch S2 is closed, stator A phase windings is powered, so as to by A Phase winding provides magnetic flux.The magnetic line of force of A phase windings generation is along A phases stator poles-air gap-rotor pole-iron core-rotor pole-air gap- The direction extension of A phase stator poles forms loop.Because now the longitudinal axis of A phase windings and the axis of rotor pole are misaligned, turn Son so transports the longitudinal axis of rotor pole towards A phase windings by by the pulling force torque of the magnetic line of force bent in air gap It is dynamic.When rotor pole axis, which is gone to, to be overlapped with the longitudinal axis of A phase windings, stop the power supply to A phase windings, then to C phases around Group power supply, continue to drive the longitudinal axis of rotor pole towards C phase windings to rotate, until the longitudinal axis of rotor pole and C phase windings During coincidence, extremely power switching is provided to magnetic flux by B phase windings.So with each stator winding of A-B-C-B-A sequential control Power supply and cut-out, so as to keep rotor continuously to run.

In power generation process, the rotor for the torque actuated main motor that engine provides, with the change of rotor-position, each phase The inductance of winding also changes therewith；When the longitudinal axis of a phase winding overlaps with the axis of rotor, the inductance of the phase winding For minimum value, when the longitudinal axis of winding and the axis of rotor are in 45 degree of angles, the inductance of the phase winding reaches maximum.Can See, as rotor-position changes, the inductance of a phase winding is among raising and lowering alternating change.When the inductance of a phase winding During in the decline stage, negative torque will be produced, is now in generating state, it is defeated that the mechanical energy for overcoming negative torque is converted into electric energy Go out.Now control the switch connection phase winding of power inverter, make the phase winding output current phase, so as to starting-generating The battery system feeding electric energy of machine connection.Therefore, it is necessary to switch connection and disconnection to power inverter in power generation process Stage be controlled, ensure the switch connection stage generally in winding inductance decline during in.

It can be seen that each phase winding according to stator whether is required for relative to rotor in starting process or power generation process The angle of axis, control being switched on and off for phase winding switch corresponding in power inverter.It will be described below, by Controller detects the angle of rotor axis by sensing mould, and when the angle reaches corresponding turn-on angle, controller is beaten Switch corresponding in power inverter is driven, between turn-on angle and shut-off angle, controller keeps the conducting of the switch；And with Rotor operation, when the angle reaches shut-off angle, corresponding switch in controller switch-off power converter.

Power inverter is that each offer one of two windings in each phase is made up of main switch and afterflow diode On-off circuit, it is as introduced above, it is required in starting process and power generation process appropriate at the time of for each phase Winding switches on and off the main switch.

Controller is by the status adjustment that each main switch switches on and off in power inverter, realizing following The control function of aspect：First, in the starting process and power generation process of starter-generator, timesharing carry out a variety of working conditions it Between switching；Secondly, under each working condition, the control to running statuses such as the input-output powers of each phase winding is realized；The Three, there is provided the various protection controls such as overvoltage, excessively stream, under-voltage.Controller realizes control function, it is necessary first to senses module offer table Show the state parameter of the running status of starter-generator.Carried out in detail below in conjunction with controller and sensing module two parts content Explanation.

Fig. 5 shows the sensing module and controller architecture schematic diagram of starter-generator.By sensing the position in module Inductive module 301 can detect each phase winding of stator among main motor relative to the angle of rotor axis, so as to supply controller Judge whether each phase reaches the turn-on angle and shut-off angle；The location sensitive module can use optical position sensitive switch, described Optical position sensitive switch includes fluted disc and optical sensor, and the sensor is fixed on the casing of main motor, and the tooth Disk is installed with rotor coaxial, and the Teeth Number is identical with the salient pole number of rotor.The location sensitive module can also use phase Inductance induction installation, inductance measurement coil is set with around ground with each phase winding of stator, due to test the inductance value of coil by The influence of magnetic flux caused by rotor, rotor-position can be detected according to the inductance value of each coil.By sensing in module Throttle position switch 302, throttle position signal can be provided, for obtaining the throttle in driver behavior；Pass through sensing The phase current sensor 303 of module, it can detect the phase current signal of each phase winding of main motor；Also, passed by battery tension Sensor 304 and accumulator current sensor 305, obtain the discharge and recharge situation for judging battery and prevent excessively stream, mistake Pressure, under-voltage battery current signal and battery tension signal.The controller 4 includes：Speed detection unit 401, is used for The rotor-position detected according to location sensitive module judges the rotating speed of main motor；Position solving unit 402, for being felt according to position The testing result of module is answered to resolve the position of rotor；Throttle detection unit 403, it is true for the signal according to throttle position switch Determine the throttle under current driving performance；Phase current sensing unit 404, for the signal provided according to phase current sensor, Determine the phase current state of each phase winding of main motor；Voltage range detection unit 405 is according to the signal of storage battery pressure sensor Extract voltage range；Control unit 406, the drive signal exported to power inverter is generated according to testing result, so as to control Each mutually switch turns on and off in power inverter.

Starter-generator can optionally cut different work shapes in the running from starting process to power generation process State, generally can be divided into initial start up state, stable power-assisted state and generating state, Fig. 6-Fig. 8 is that starter-generator state is cut Change flow chart.Require that controller uses different control strategy and control method under different working conditions.Controller determines institute The parameter of incision working condition foundation includes engine speed, battery system state and throttle.In starting process, Rotor makes the rotating speed of engine start from scratch rapid lifting, reaches predetermined engine idle rotational in rotor（General 800r/ min）It is in initial start up state all the time before.Controller control starter-generator is in electricity in whole initial start up state Dynamic model formula, the starter as external output torque work；When the rotating speed of engine rises to more than idling, controller can be with base In battery system state and driving operation state parameter, stable power-assisted state either generating state is cut in control respectively, Starter-generator is in electric model in power-assisted state is stablized, and starter-generator operates in generating mould under generating state Formula, energy is provided to battery system as generator.

Under initial start up state, stable three kinds of working conditions of power-assisted state and generating state, controller and then it is directed to The running status of each phase switch conduction and shut-off and prevent overvoltage, excessively stream, under-voltage be controlled.Controller is in various work shapes Controllable running state parameters include turn-on angle recited above and shut-off angle, and current chopping threshold value under state.

Under initial start up state, because rotor speed is very low, counter electromotive force is substantially zeroed, and the electric current of each phase winding rises Only limited by winding self-resistance and self-induction, the excessive trend of phase current is presented.Therefore need to control phase current to be no more than Upper threshold, so as to avoid impact torque excessive in starting process.Now controller is adjusted using Current cut control mode Phase current.In Current cut control mode, when rotor-position is between turn-on angle and shut-off angle, controller becomes power Switch conduction in parallel operation, so as to which phase current is risen near current chopping limit, limited in phase current more than or equal to current chopping, The switch in the power inverter is then turned off, declines phase current, until phase current is beaten again again after being limited less than current chopping Drive the switch.Phase current is so set to be maintained near the current chopping limit.

After the rotating speed of starter-generator exceedes engine idle rotational, then controller according to battery system state and Driving operation state parameter, timesharing switch in the case where stablizing power-assisted state and generating state.Wherein, according to the battery tension of detection Size, judging that it is in allows power-assisted scope still to allow generation range.When in allow in the range of power-assisted when, now battery Energy storage allow starter-generator be motive provide power torque output, now according to throttle, judge whether to locate In throttle on earth；In throttle on earth in the state of, then controller control starter-generator be in electric model, so as to provide Power-assisted, and be not in throttle on earth state when, starter-generator enter shut down standby mode.On the contrary, allow when battery is in Generation range, then according to throttle, throttle not on earth when control starter-generator enter power generation mode, and in throttle on earth When, in order to ensure the power output of engine, control starter-generator, which is in, shuts down standby mode.

In the case where stablizing power-assisted state, whether controller exceedes control mode switching threshold value according to the rotating speed of rotor, in electric current Switching is performed between chopper control mode and Angle-domain imaging mode.When the rotating speed of rotor switches threshold less than Electronic control mode During value, circuit is caused to damage in order to avoid producing too high phase current, still using Current cut control side presented hereinbefore Switch conduction and closure in formula control power inverter, so as to which phase current size is maintained at into a predetermined safety value scope It is interior.And after being increased to above Electronic control mode switching threshold with the rotating speed of rotor, due to phase current cycle time and motion The increasing of electromotive force, phase current peak-fall, it is no longer necessary to perform Current cut control mode, but need to increase effective phase Electric current transfers to use angle control mode to improve the output under electric model.Under angle control mode, controller adjustment The control to winding phase current size is realized at the turn-on angle and shut-off angle, and then controls power output.By will be described open-minded Angle shifts to an earlier date, and extends and opens the cycle, so as to increase the peak value of phase current, so as to improve the virtual value of phase current.And for closing For the angle of rupture, with the increase at shut-off angle, it can influence to enter the size of current that inductance declines area, decline area's phase current in inductance Rate of change is negative, can produce negative torque, reduces system and contributes.In order to determine the turn-on angle of optimization and turn off angle, controller is pre- First setting speed, battery tension and turn-on angle, the mapping value pair for turning off angle angle, according to the current rotating speed and storage detected Cell voltage, inquire about the mapping value pair and determine currently employed turn-on angle, shut-off angle angle, and it is open-minded determined by application The conducting and disconnection switched in angle, hold-off angle control power inverter.

Under power generation mode, due to existing, engine input speed scope is wide and load changes obvious object point, the present invention Equally employ the control mode of segmentation switching.When engine speed is less than Generation Control mode switching threshold, electricity can be used Flow copped wave and angle control complex controll mode.Wherein Current cut control can ensure that power inverter is abundant, reliable work While work, the percussion of phase current is reduced, and angle control can adjust phase current and output voltage.Current chopping and angle Degree controls complex controll mode according to rotating speed, output voltage and turn-on angle, turns off the mapping value pair at angle, chooses the turn-on angle of optimization With shut-off angle range, and the size of excitation copped wave threshold value control exciting current is used so that exciting current, which is no more than, to be born Preset range, so as to reach control generate electricity output target.And when engine input speed is greater than or equal to Generation Control side After formula switching threshold, due to the rise of rotating speed, it is gradually obvious to move the influence of potential, and excitation time shortens, and causes to encourage The peak value of magnetoelectricity stream does not reach copped wave limit, therefore in order to ensure the stabilization of generated output, controller transfers to switch to angle position Control model, power output is adjusted by adjusting the size of turn-on angle and shut-off angle.In power generation process, specifically exporting Under power, the optimum value at angle and the relation unobvious of rotation speed change are turned off, thus can among Angle-domain imaging pattern To be chosen and kept specific fixed optimize to turn off angle according to power output.And turn-on angle and power output presentation are better Good linear relationship, therefore controller can reflect after it is determined that optimizing shut-off angle according to rotating speed and power output inquiry Penetrate value pair and adjust the turn-on angle of optimization in real time, controller is according to fixed optimization shut-off angle and the optimization adjusted in real time Turn-on angle respectively mutually switchs to control in power inverter.

The foregoing is only a specific embodiment of the invention, and the present invention can be applied in miscellaneous equipment；Retouch above Size and number in stating are only informative, the application chi that those skilled in the art can be appropriate according to selection is actually needed It is very little, without departing from the scope of the present invention.Protection scope of the present invention is not limited thereto, any technology for being familiar with the art Personnel the invention discloses technical scope in, the change or replacement that can readily occur in, should all cover the protection model in the present invention Within enclosing.Therefore, protection scope of the present invention should be defined by the protection domain that claim is defined.

Claims

1. a kind of method of work of starter-generator, it is characterised in that the starter-generator includes：Main motor, power conversion Device, sensing module, controller；The main motor includes stator and rotor, both at the salient-pole structure of non-permanent magnet；It is described fixed Attached bag includes polyphase windings, and each of which phase winding is made up of a pair of winding coils on the salient pole diametrically of stator；

Also, the controller determines to control the control of the state of each main switch in power inverter under current operating state Mode processed;

Described method of work, including：The controller judges whether rotor speed reaches predetermined engine idle rotational, such as Fruit not up to then determines that current operating state is initial start up state；If the engine idling that rotor speed reaches predetermined turns Speed, the controller are based on battery system state parameter, and judging that battery system is in allows power-assisted scope still to allow to send out Electric scope；In the permission power-assisted scope, controller judges whether in throttle on earth, locating according to the throttle parameter The stable power-assisted state of starting-generating incision is controlled under throttle on earth state, otherwise remains shut off standby mode；In the permission Generation range, controller judge whether in throttle on earth according to the throttle parameter, and throttle state on earth is in non- Lower control starter-generator enters generating state, and wait mould is shut down controlling starter-generator to enter under throttle on earth state Formula.