CN202679302U - BSG (belt-starter generator) motor control system used for micro hybrid electric vehicle - Google Patents
BSG (belt-starter generator) motor control system used for micro hybrid electric vehicle Download PDFInfo
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- CN202679302U CN202679302U CN2012203111784U CN201220311178U CN202679302U CN 202679302 U CN202679302 U CN 202679302U CN 2012203111784 U CN2012203111784 U CN 2012203111784U CN 201220311178 U CN201220311178 U CN 201220311178U CN 202679302 U CN202679302 U CN 202679302U
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Abstract
The utility model provides a BSG (belt-starter generator) motor control system used for a micro hybrid electric vehicle. The system comprises positive and negative buses led from two poles of a power supply, a three-phase inverter/rectifier circuit connected between the positive and negative buses, a three-phase winding of a BSG motor stator, a chopper voltage reduction circuit and a BSG motor rotor excitation winding, wherein the three-phase winding is connected with the three-phase inverter/rectifier circuit; the chopper voltage reduction circuit and the BSG motor rotor excitation winding are connected in series between the positive and negative buses. The chopper voltage reduction circuit is connected with an external controller and is controlled by the external controller. The rotor excitation winding possesses an excitation winding equivalence resistor and an excitation winding equivalence inductor which are connected in series. A booster circuit which is controlled by the external controller is connected between the power supply and the chopper voltage reduction circuit. A second freewheeling diode and a bleeder resistor which are connected in series are connected in parallel with the rotor excitation winding between the chopper voltage reduction circuit and the negative bus. A resistance of the bleeder resistor is greater than the resistance of the excitation winding equivalence resistor. By using the system of the utility model, dynamic performance of a start stop system of a micro hybrid electric vehicle engine can be improved.
Description
Technical field
The utility model belongs to the new-energy automobile technical field, particularly to the little mixed BSG(Belt-Starter Generator of idling, belt starter-generator) control system of the BSG motor of start stop system.
Background technology
At present, vehicle energy saving and green technology mainly contain two lines: one is to improve to reach energy-conservation and requirement environmental protection for conventional truck; Another is the research and development of novel energy-conserving and Cleaning Equipment, comprises alternative fuel vehicle (Alternative-Fuel Vehicles, AFV), mixed power electric car (Hybrid ElectricVehicles, HEV) etc.Yet research and development novel energy-conserving and Cleaning Equipment are merely able to reduce at vehicle of new generation the discharging of fuel consume and C02, can not fundamentally solve the problem of the fuel oil waste of existing vehicle.Because when vehicle travels at urban road, its dead time accounts for a big chunk of total run time, and its fuel consumption of asking accounts for 30% of cumulative fuel consumption.In the vehicle behavior emission test, the CO that discharges during the idling and HC amount account for about 70% of total release usually.
And in the city, because population and vehicle are more concentrated, caused the particularity of city vehicle operating condition, particularly for urban bus, the website of stopping is many, add traffic road junction red parking, starting and parking are very frequent, and the most of energy form with frictional heat in braking procedure that has caused engine to produce has consumed.Owing to there being long parking operating mode, make engine long be in temporally idle state again, cause the problems such as the speed of a motor vehicle is low, oil consumption is high, seriously polluted.
Therefore, exploitation idling start stop system is eliminated to a great extent capable of saving fuel oil of idling operation, improves vehicle economy, has the wide market demand.
Idling start stop system (Idle Stop﹠Start System, be called for short ISS) can be when vehicle stop, so that engine automatic stop, and when the driver has the intention of starting vehicle (such as let slip the clutch or accelerator pedal), do not need the manual ignition just can automatically to pilot engine, this has been avoided automobile unnecessary fuel consume and discharging of tail gas when stopping.Especially in the city, city, travelling; vehicle often stops; engine is idle running then; and the idling operation of automobile in urban road accounts for more than 25%; at automobile the idling start stop system being installed can eliminate idling; improve greatly the fuel economy of city automobile, and certain effect has been played in environmental protection.Although move towards just step by step family at China's car, family's car, track traffic and urban bus will become the main delivery vehicle of big city, megalopolis resident trip, so the research and development of idling start stop system and industrialization to China's energy-saving and emission-reduction, are advanced the development of automobile industry and build a resource-conserving society and all have an important in inhibiting.
The idling start stop system is to do improvement on the basis of orthodox car generator system, can do slight variations in the dynamo belt train of conventional engines, namely increases therein regulating wheel, to realize the double-direction twist moment transmission.The BSG of idling start-stop system motor is as double-purpose: provide under the electric model to produce negative moment under the quick ato unit of forward moment, the power generation mode 12V battery is charged.Idling start-stop BSG main function of system is in the engine idle situation, the BSG system is by CAN bus and the mutual car load control information of engine management system, and according to the driving cycles of car load, automatically realize the start-stop control of engine, thereby reduce the oil consumption situation in the idling situation.
The circuit theory of orthodox car claw pole electric generator (Claw-pole generator) voltage control circuit as shown in Figure 1.By the pulse width control rotor excitation current of control chopper circuit, thereby the amplitude of regulating electric machine back-emf finally reaches the output voltage of controlling rectification circuit.
The BSG motor is a kind of traditional claw pole electric generator, and the circuit theory of the BSG of idling start-stop system circuit for controlling motor as shown in Figure 2.Based on MOSFET(Metal-Oxide-Semiconductor Field-Effect Transistor, metal-oxide layer-semiconductor-field-effect transistor is called for short metal-oxide half field effect transistor) inverter circuit and the rectification circuit of controlled power device be integrated in one.When engine start was controlled, the BSG machine operation was at electric model, and 12V plumbic acid power supply provides electric energy to export to the BSG motor by inverter, BSG motor output forward moment ato unit; Under the high speed power generation mode, the BSG controller is regulated the back-emf amplitude of BSG by the excitation winding electric current of chopper control rotor, and three-phase inverter is as rectifier, thereby motor is charged to the 12V battery.
In order to realize very high BSG winding back emf coefficient, the rotor field coil of BSG motor is because umber of turn is many, winding equivalent inductance value is bigger than normal, and electrical time constant (electrical time constant=winding inductance/winding resistance, i.e. T (E)=L (E)/R (E)) is large.Because the back-emf of BSG motor is directly controlled by the rotor field coil electric current, large winding inductance is when realizing winding current control by copped wave, the speed of curent change is little, thereby causes the BSG motor no matter at electric model or under power generation mode, and the dynamic response of motor is slow.
What Fig. 3 illustrated is that BSG circuit for controlling motor commonly used is in the excitation winding electric current temporal evolution situation of BSG motor in startup, stable electric generation load and generating unloading situation.Because the large electric inertia of excitation winding, no matter exciting current is in the situation that loading current increases and the unloading electric current descends, and curent change speed is low, thereby can cause that risk under-voltage, overvoltage appears in the 12V battery terminal voltage.
Under power generation mode, the inverter of BSG motor is operated in passive rectification state, and the BSG motor is to the 12V charge in batteries.When the 12V battery occurs changing to suddenly very little load (sporting 10% such as the electrical load from 90%) from a very large electrical load, the BSG controller can automatically shut down switch mosfet G (P), fast rapidly conducting of sustained diode (Z), thereby the excitation winding electric current is carried out afterflow, the excitation winding terminal voltage becomes the conducting voltage (near 0.7V) of diode D (Z), and winding current I (E) beginning descends gradually.But because the large inertia time constant (T (E) is between the 200-500 millisecond usually) of BSG motor excitation winding, add the impacts such as 12V battery and wired equivalent inductance, the 12V battery terminal voltage can form of short duration overvoltage process, and voltage magnitude can surpass the marginal range of rules and regulations.The overvoltage meeting causes many potential risks, may cause the overvoltage infringement of some car load electric-control system, and its potential risks are huge.
The utility model content
Existing micro hybrid vehicle BSG electric machine control system exciting current rate of change when motor loads and unload is low in order to solve, the problem of Electric Machine Control low-response, and the utility model provides a kind of micro-hybrid automobile-used BSG electric machine control system.
The utility model for the technical scheme that provides is provided is:
The automobile-used BSG electric machine control system of a kind of micro-hybrid, comprise the positive and negative busbar of being drawn by two poles, be connected to three-phase inversion/rectification circuit, BSG motor stator three phase windings that are connected with three-phase inversion/rectification circuit between positive and negative busbar and be serially connected with chopping depressuring circuit and BSG rotor excitation winding between positive and negative busbar, the chopping depressuring circuit is connected with peripheral control unit and controlled by it, and rotor field coil has mutually excitation winding equivalent resistance and the excitation winding equivalent inductance of serial connection; Be connected to the booster circuit that is subjected to peripheral control unit control between power supply and chopping depressuring circuit, the input of booster circuit links to each other with power supply, and its output links to each other with the chopping depressuring circuit input end; Between chopping depressuring circuit and negative busbar, with rotor field coil and be connected to mutual the second fly-wheel diode and bleeder resistance of connecting, the bleeder resistance resistance is greater than excitation winding equivalent resistance resistance.
Further, booster circuit comprises filter inductance, the 3rd diode, the 3rd MOSFET and filter capacitor, the grid of the 3rd MOSFET links to each other with peripheral control unit and controlled by it, filter inductance one termination positive bus-bar, the other end is divided into two-way: the one tunnel is connected to negative busbar after connecing the drain electrode of the 3rd MOSFET, another road connects behind the 3rd diode cathode as the output of booster circuit, and filter capacitor is connected between the negative pole and negative busbar of the 3rd diode.
Further, power supply is 12V, and the output voltage of booster circuit is more than or equal to 30V, less than or equal to 40V.
Further, the resistance of bleeder resistance more than or equal to 5 ohm, less than or equal to 10 ohm.
Further, the chopping depressuring circuit comprise a MOSFET and with a MOSFET and the first fly-wheel diode of connecing, the grid of a MOSFET links to each other with peripheral control unit and controlled by it; Output in the booster circuit is connected with the drain electrode of a MOSFET of control circuit of chopping; Rotor field coil is connected between the source electrode and negative busbar of a MOSFET.
The beneficial effects of the utility model are:
BSG electric machine control system of the present utility model can improve micro hybrid vehicle engine start stop system dynamic property, mainly improves BSG motor fast discharging and rapid loading performance.Whole concept of the present utility model is improved BSG motor rapid loading ability for improving BSG motor relieving capacity by series connection bleeder resistance in the excitation continuous current circuit by the control voltage that improves the BSG motor excitation.
The bleeder resistance of in BSG rotor excitation winding continuous current circuit, connecting, current drain speed is accelerated under the steady load, especially in the fast discharging situation, exciting current can drop to required load exciting current rapidly, the risk of the appearance overvoltage of vehicle-mounted low tension battery terminal voltage under the fast discharging situation can be controlled in the scope of rules and regulations, when the 12V battery occurs changing to suddenly very little load from a very large electrical load, this moment by the series connection bleeder resistance can release fast rotor field coil in exciting current, stop generating output thereby the BSG motor is responded fast, avoid the overvoltage of 12V battery terminal voltage; Use booster circuit, the input voltage of the control circuit of chopping of BSG rotor excitation winding is increased to reliably higher voltage, rapid output torque when making the BSG electric motor starting, but moment is exported the fast-response control instruction in the control procedure.
Description of drawings
Fig. 1 is the voltage control circuit principle schematic of orthodox car claw pole electric generator;
Fig. 2 is the control circuit principle schematic of existing idling start-stop system BSG motor commonly used;
Fig. 3 is the time trend schematic diagram of the excitation winding Current Control of BSG circuit for controlling motor commonly used;
Fig. 4 is the circuit theory schematic diagram of the utility model Embodiment B SG electric machine control system;
Fig. 5 is the time trend schematic diagram of the excitation winding Current Control of the utility model embodiment.
Embodiment
Below in conjunction with description of drawings and embodiment the utility model is further specified.
As shown in Figure 4, positive bus-bar 61, the negative busbar 62 that the utility model Embodiment B SG electric machine control system comprises the 12V battery feed, drawn by the power supply positive and negative polarities, be connected to the three-phase inversion/rectification circuit 5 between positive and negative busbar, BSG motor stator three phase windings 4 that link to each other with inverter circuit/rectification circuit 5, and order is serially connected with chopping depressuring circuit 1 and BSG rotor excitation winding 2 between positive and negative busbar; Chopping depressuring circuit 1 comprises a MOSFET G1 as device for power switching, with a MOSFET G1 and the first sustained diode 1 that connects with control a MOSFET G1, the grid of the one MOSFET G1 is connected with the controller of engine start stop system and the switch motion of a MOSFET is controlled by it, rotor field coil 2 is connected between the source electrode and negative busbar 62 of a MOSFET G1, and rotor field coil 2 has mutually excitation winding equivalent resistance R2 and the excitation winding equivalent inductance L2 of serial connection; Between chopping depressuring circuit 1 and negative busbar 62, with rotor field coil 2 and be connected to the second sustained diode 2; As shown in Figure 4, the BSG electric machine control system of the present embodiment is at chopping depressuring circuit 1 input end access first class boost circuit 3, booster circuit 3 comprises filter inductance L3, filter capacitor C3, the 3rd diode D3 and the 3rd MOSFET G3, the grid of the 3rd MOSFET G3 is connected with the controller of engine start stop system and switch motion is controlled by it, filter inductance L3 one termination positive bus-bar 61, the other end is divided into two-way: the one tunnel is connected to negative busbar 62 after connecing the drain electrode of the 3rd MOSFET G3, another road connects behind the 3rd diode D3 anodal as the output (the namely negative pole end of the 3rd diode D3) of booster circuit 3 and is connected with the drain electrode of a MOSFET G1 of chopping depressuring circuit 1, and filter capacitor C3 is connected between the negative pole and negative busbar 62 of the 3rd diode D3.
Use booster circuit 3, its Voltage-output is 30-40V, the input voltage of the chopping depressuring circuit 1 of rotor field coil 2 is increased to the reliable and secure voltage of 30-40V, because terminal voltage improves, the exciting current rate of change of rotor field coil 2 increases, be exciting current I (E) but fast rise, thereby when the BSG electric motor starting rapid output torque, but moment output fast-response control instruction in the control procedure.Because the input voltage of chopping depressuring circuit 1 improves, exciting current I (E) rise time of rotor field coil accelerates as can be known by V/L=di/dt.As shown in Figure 4, when exciting current I (E) being carried out copped wave control, it is open-minded that controller is controlled a MOSFET G1, and exciting current I (E) increases, and the climbing speed of electric current will be than greatly improving directly with the 12V cell voltage time.Like this, under BSG electric motor starting and generating loading condition, the dynamic control performance of motor improves, quick output torque when starting, and the dynamic load dynamic response helps to overcome the battery undervoltage problem that causes under the rapid loading variation fast.
Preferably, with the branch road at BSG rotor excitation winding 2 and the second sustained diode 2 places of connecing in, serial connection enters bleeder resistance R (Z).Series connection enters bleeder resistance R (Z) in rotor field coil 2 continuous current circuits, when the 12V battery occurs changing to suddenly very little load from a very large electrical load, for example sport 10% from 90% electrical load, controller can automatically shut down a MOSFET G1, need this moment the BSG motor to stop generating, otherwise can cause the 12V battery terminal voltage can form of short duration overvoltage process, voltage magnitude can surpass the marginal range of rules and regulations.And by can release fast electric current in the rotor field coil 3 of bleeder resistance R (Z), thereby the BSG motor is responded fast, stop generating output, avoid the overvoltage of 12V battery terminal voltage.
Be operated in as BSG in the situation of fast discharging, a MOSFET G1 controlled by controller and the 3rd MOSFET G3 is in off state, the quick bleed-off circuit discharge of the electric current of BSG rotor excitation winding 2 by being comprised of bleeder resistance R (Z) and the second sustained diode 2, the terminal voltage overvoltage risk of vehicle-mounted like this low tension battery is controlled.Can suitably match according to actual conditions the resistance value of bleeder resistance R (Z), because the excitation winding equivalent resistance R2 of BSG rotor is usually about 1 ohm, simultaneously since filter capacitor C3 terminal voltage far above the 12V battery tension, the resistance of bleeder resistance R (Z) can be selected greatlyr, be generally the 5-10 of excitation winding equivalent resistance R2 doubly, be that R (Z) can be between 5-10 ohm, the electrical time constant of excitation winding continuous current circuit becomes T (E-afterflow)=L2/ (R2+R (Z)) like this, the afterflow electrical time constant T (E-afterflow) of change can be much smaller than the electrical time constant T (E) of former excitation winding, thereby reduced the inertia of BSG motor in the fast discharging situation, the 12V battery terminal voltage can be controlled in the limited range, thereby has reduced the overvoltage risk to the car load electric equipment.
When controller is controlled MOSFET G1 shutoff, 2 conductings of the second sustained diode, the exciting current I (E) of BSG rotor excitation winding 2 is owing to the existence of large inductance excitation winding equivalent inductance L2 can not change immediately, the introducing of bleeder resistance R (Z) will cause transient high voltages (transient high voltages=I (E) * (R2+ R (Z)+V (D2)), V (D2) expression the second sustained diode 2 both end voltage), at this moment the first sustained diode 1 and filter capacitor C3 will play the effect of voltage buffering, the 3rd diode D3 can further play the effect of high pressure blocking-up simultaneously, prevents that high voltage transient from causing the risk of transient overvoltage to the 12V accumulator voltage.
Under the rectification operating mode, by the three-phase controlled power device MOSFET of control inverter circuit, realize initiatively rectification, thereby be reduced in the conduction loss of inverter circuit under the charge mode, improve BSG system charge efficiency.
The time trend of the rotor excitation winding Current Control of the present embodiment as shown in Figure 5, use the BSG electric machine control system of the utility model embodiment, the BSG motor start and the unloading situation under being greatly improved of rotor excitation winding curent change.The inferior position of the large electric inertia of rotor excitation winding is eliminated fully, start and unload and all can realize quick response, reduce simultaneously the risk of the under-voltage and fast discharging battery terminal voltage overvoltage of rapid loading, effectively improved the Whole Response performance of BSG Electric Machine Control.Also can improve by controller the switching frequency of boost pulsewidth copped wave and buck circuit, the smoothly copped wave of exciting current impact.
As above institute's cloud is in conjunction with concrete preferred implementation further detailed description of the utility model, can not assert that implementation of the present utility model is confined to these explanations.For the utility model person of an ordinary skill in the technical field, under the prerequisite that does not break away from the utility model design and intension, can also make some simple deduction or replace, all should be considered as belonging to protection range of the present utility model.
Claims (5)
1. automobile-used BSG electric machine control system of micro-hybrid, comprise the positive and negative busbar of being drawn by two poles, be connected to three-phase inversion/rectification circuit, BSG motor stator three phase windings that are connected with three-phase inversion/rectification circuit between positive and negative busbar and be serially connected with chopping depressuring circuit and BSG rotor excitation winding between positive and negative busbar, the chopping depressuring circuit is connected with peripheral control unit and controlled by it, and rotor field coil has mutually excitation winding equivalent resistance and the excitation winding equivalent inductance of serial connection; It is characterized in that: be connected to the booster circuit that is subjected to peripheral control unit control between power supply and chopping depressuring circuit, the input of booster circuit links to each other with power supply, and its output links to each other with the chopping depressuring circuit input end; Between chopping depressuring circuit and negative busbar, with rotor field coil and be connected to mutual the second fly-wheel diode and bleeder resistance of connecting, the bleeder resistance resistance is greater than excitation winding equivalent resistance resistance.
2. BSG electric machine control system according to claim 1, be further characterized in that: booster circuit comprises filter inductance, the 3rd diode, the 3rd MOSFET and filter capacitor, the grid of the 3rd MOSFET links to each other with peripheral control unit and controlled by it, filter inductance one termination positive bus-bar, the other end is divided into two-way: the one tunnel is connected to negative busbar after connecing the drain electrode of the 3rd MOSFET, another road connects behind the 3rd diode cathode as the output of booster circuit, and filter capacitor is connected between the negative pole and negative busbar of the 3rd diode.
3. BSG electric machine control system according to claim 1 and 2, be further characterized in that: power supply is 12V, and the output voltage of booster circuit is more than or equal to 30V, less than or equal to 40V.
4. BSG electric machine control system according to claim 1 is further characterized in that: the resistance of bleeder resistance more than or equal to 5 ohm, less than or equal to 10 ohm.
5. BSG electric machine control system according to claim 1 is further characterized in that: the chopping depressuring circuit comprise a MOSFET and with a MOSFET and the first fly-wheel diode of connecing, the grid of a MOSFET links to each other with peripheral control unit and controlled by it; Output in the booster circuit is connected with the drain electrode of a MOSFET of control circuit of chopping; Rotor field coil is connected between the source electrode and negative busbar of a MOSFET.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012203111784U CN202679302U (en) | 2012-06-29 | 2012-06-29 | BSG (belt-starter generator) motor control system used for micro hybrid electric vehicle |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2012203111784U CN202679302U (en) | 2012-06-29 | 2012-06-29 | BSG (belt-starter generator) motor control system used for micro hybrid electric vehicle |
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| CN202679302U true CN202679302U (en) | 2013-01-16 |
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| CN2012203111784U Expired - Fee Related CN202679302U (en) | 2012-06-29 | 2012-06-29 | BSG (belt-starter generator) motor control system used for micro hybrid electric vehicle |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106921322A (en) * | 2015-12-28 | 2017-07-04 | 朋程科技股份有限公司 | generator control circuit |
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2012
- 2012-06-29 CN CN2012203111784U patent/CN202679302U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106921322A (en) * | 2015-12-28 | 2017-07-04 | 朋程科技股份有限公司 | generator control circuit |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130116 Termination date: 20130629 |