CN204095556U - A kind of drive system of electric automobile trouble diagnosing Centralized Controller - Google Patents
A kind of drive system of electric automobile trouble diagnosing Centralized Controller Download PDFInfo
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- CN204095556U CN204095556U CN201420509347.4U CN201420509347U CN204095556U CN 204095556 U CN204095556 U CN 204095556U CN 201420509347 U CN201420509347 U CN 201420509347U CN 204095556 U CN204095556 U CN 204095556U
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Abstract
The utility model discloses a kind of drive system of electric automobile trouble diagnosing Centralized Controller, comprise (1) left front/right front/left back/off hind wheel driving governor, embedded main control module, acquisition of signal correction module, hall signal resolve module, power driver module, wheel speed estimation block, power inverting switch breakdown fault diagnostic module, major-minor hall signal redundancy check module and major-minor hall signal sequence of rules correction verification module; (2) car load wheel speed contrast module; The utility model based on signal characteristic analyzing principle, for power inverting switch breakdown fault, propose to compare conducting phase current and earth current at plate diagnostic method; For wheel hub motor Hall element failure of removal, propose major-minor hall signal redundancy check, major-minor hall signal sequence of rules School Affairs car load wheel speed contrast plate diagnosis and car load diagnose the diagnostic method combined; Adopt above method greatly can improve the reliability of drive system of electric automobile.
Description
Technical field
The utility model relates to electronlmobil diagnosis control field, particularly a kind of drive system of electric automobile trouble diagnosing Centralized Controller.
Background technology
Be called as the electronlmobil of environmental protection automobile, pollute because it has zero-emission and save the advantages such as oil resources, having received and paid attention to widely.Electronlmobil has four guardian techniques: battery technology, Drive Control Technique, car load technology and energy management technology.And Drive Control Technique is as its core, the excellent degree direct influence of its performance is to the safety performance of electric automobile during traveling.As everyone knows, be subject to the impact of the factors such as frequent loading and work under bad environment in the application due to it, it is inevitable that drive system of electric automobile breaks down.
At present, the method for drive system of electric automobile trouble diagnosing can be divided into two kinds: at plate diagnosis (On-board Diagnostic) and car load diagnosis (Vehicle Diagnostic).In the principle of plate diagnosis be: when electronlmobil normally runs, the input of its drive system, the magnitude of voltage of output signal have certain variation range, when the magnitude of voltage of a certain signal is beyond this scope, and this phenomenon does not disappear within a period of time, can judge that drive system breaks down, and this fault with the form of code stored in internal random memory device, light fault-indicating lamp on instrument carrier panel simultaneously and remind chaufeur.The principle of car load diagnosis is: its operation information is sent to entire car controller by vehicle bus by drive system, then judges that the operational parameter value of operation information is whether all in the range of parameter values of correspondence, if so, shows that operation information is normal; Otherwise, show to include the abnormal running information not in the range of parameter values of correspondence, according to the Fault Diagnosis Database of abnormal running information inquiry this locality, from Fault Diagnosis Database, read the failure message corresponding to abnormal running information.
There is following several respects problem in above-mentioned method for diagnosing faults:
Although 1, drive system of electric automobile fault can be diagnosed fast and accurately in plate diagnosis, the component breakdown fault of the hardware circuits such as the inverter circuit in such as power driver module cannot be diagnosed.
2, car load diagnosis carries out trouble diagnosing for multiple electronic control system, drive system is one of them, and its operation information is transmitted by vehicle bus, must take a large amount of bus times, indirectly extend the time of trouble diagnosing, add the probability of causing danger on the contrary.
Summary of the invention
The technical problems to be solved in the utility model overcomes prior art Problems existing, a kind of drive system of electric automobile trouble diagnosing Centralized Controller is provided, adopt the method for diagnosing faults based on signal characteristic analyzing, to combine at plate diagnostic technology and car load diagnostic technology, to ensure premised on good loading characteristic and braking characteristics, be intended to improve drive system of electric automobile reliability.
The utility model provides a kind of drive system of electric automobile trouble diagnosing Centralized Controller, comprising: main control module 5, acquisition of signal correction module 6, hall signal resolve module 7, power driver module 8, wheel speed estimation block 9, power inverting switch breakdown fault diagnostic module 10, major-minor hall signal redundancy check module 11, major-minor hall signal sequence of rules correction verification module 12 and car load wheel speed contrast module 13.
Wherein, main control module 5, acquisition of signal correction module 6, hall signal resolve module 7, power driver module 8, wheel speed estimation block 9, power inverting switch breakdown fault diagnostic module 10, major-minor hall signal redundancy check module 11 and major-minor hall signal sequence of rules correction verification module 12 and are embedded in left front/right front/left back/off hind wheel driving governor; Car load wheel speed contrast module receives left front/right front/left back/off hind wheel wheel speed by vehicle bus, and carries out wheel speed contrast in entire car controller.
Main control module 5, embedded main control chip and minimum circuit thereof, main control chip adopts the digital signal processor DSP TMS320F2812 of TIX.
Acquisition of signal correction module 6, embedded bus voltage gathers port, current acquisition port, correction voltage collection port, and is revised the AD conversion error caused by main control chip zero creep by correction process.
Hall signal resolves module 7, hall signal solution is counted as main control chip manner of comparison control register value, make it to export corresponding PWM drive singal with reference to wheel hub motor commutation phase sequence, and the major-minor hall signal gathered is sent to major-minor hall signal redundancy check module and major-minor hall signal sequence of rules correction verification module.
Power driver module 8, embedded driving circuit and power inversion circuit, to hold mutually with wheel hub motor at the ground end of power inversion circuit and add current sensor, and the earth current signal of collection and phase current signal are sent to power inverting switch breakdown fault diagnostic module.
Wheel speed estimation block 9, main control module 5 triggers the capture interrupt of main control chip by the low and high level change of wheel hub motor hall signal, estimated the wheel speed of wheel hub motor by the interval time recording adjacent twice interruption, and wheel speed value is sent to car load wheel speed contrast module.
Power inverting switch breakdown fault diagnostic module 10, main control module 5 is by comparing the earth current power inverting switch breakdown fault of diagnosing the power inversion circuit of left front/right front/left back/off hind wheel driving governor whether equal to wheel hub motor conducting phase current.Because motor conducting phase and ground form the same circuit, therefore conducting phase current and to enter ground circuit inevitable equal; Otherwise if certain power switch of power inversion circuit is breakdown, wheel hub motor must be caused to occur short circuit mutually accordingly, short circuit phase current is zero, and obvious earth current is non-vanishing.
Major-minor hall signal redundancy check module 11, whether main control module 5 carries out signal redundancy verification by two groups of Hall elements that wheel hub motor carries and diagnoses left front/right front/left back/right back wheel hub motor Hall element to lose efficacy.
Major-minor hall signal sequence of rules correction verification module 12, the Changing Pattern of hall signal within the adjacent commutation cycle of wheel hub motor is fixing, and whether main control module 5 utilizes this fixing rule that the Hall element of left front/right front/left back/right back wheel hub motor can be diagnosed to lose efficacy.
Car load wheel speed contrast module 13, wheel speed estimation block is received to the wheel speed estimated value of left front/right front/left back/right back wheel hub motor by vehicle bus, if the relative error of the estimation wheel speed value of certain wheel hub motor exceedes threshold value, illustrate that corresponding wheel hub motor Hall element lost efficacy.
Compared with prior art the beneficial effects of the utility model are:
1, the method adopting AD to correct solves the problem causing AD conversion precision to reduce by main control chip zero creep, such that drive system of electric automobile reliability is higher, applicability is stronger.
2, adopt the method comparing conducting phase current and earth current to diagnose and the power inverting switch breakdown fault of Positioning power inverter circuit, its diagnostic method principle is simple, be easy to realize.
3, adopt plate diagnosis and car load diagnose the wheel hub motor Hall element failure of removal diagnostic mode combined, the accuracy rate of its trouble diagnosing is improved greatly.
Accompanying drawing illustrates:
Fig. 1 is structured flowchart of the present utility model.
Fig. 2 is correction processing method block diagram of the present utility model.
Fig. 3 is hall signal schematic diagram of the present utility model.
Fig. 4 is power inversion circuit structured flowchart of the present utility model.
Fig. 5 is hall signal solver diagram of circuit of the present utility model.
Fig. 6 is power inverting switch breakdown fault diagnostic program diagram of circuit of the present utility model.
Fig. 7 is major-minor hall signal sequence of rules checking routine diagram of circuit of the present utility model.
Fig. 8 is wheel speed estimation program diagram of circuit of the present utility model.
Detailed description of the invention:
Below in conjunction with accompanying drawing, detailed description of the invention of the present utility model is described.
Fig. 1 represents structured flowchart of the present utility model, comprising: main control module 5, acquisition of signal correction module 6, hall signal resolve module 7, power driver module 8, wheel speed estimation block 9, power inverting switch breakdown fault diagnostic module 10, major-minor hall signal redundancy check module 11, major-minor hall signal sequence of rules correction verification module 12, car load wheel speed contrast module 13.
Wherein, main control module 5, acquisition of signal correction module 6, hall signal resolve module 7, power driver module 8, wheel speed estimation block 9, power inverting switch breakdown fault diagnostic module 10, major-minor hall signal redundancy check module 11 and major-minor hall signal sequence of rules correction verification module 12 and are embedded in left front/right front/left back/off hind wheel driving governor; Car load wheel speed contrast module receives left front/right front/left back/off hind wheel wheel speed by vehicle bus, and carries out wheel speed contrast in entire car controller.
The digital signal processor TMS320F2812 that main control module 5 adopts Texas Instruments to produce is main control chip, and this treater has the multiplication accumulation function of monocycle 32 × 32, can complete the data processing of 64, can realize software upgrading easily.In addition, also comprise abundant peripheral unit: 12 high-precision AD converters, the functional module such as task manager, enhancement mode bus controller towards electric machine control, owing to control flexibly and antijamming capability is strong, be very suitable for hub motor control system.
Acquisition of signal correction module 6, embedded bus voltage gathers port, current acquisition port, VREF (Voltage Reference) gather port, and wherein bus voltage signal is input to through non-essential resistance the single-ended signal being converted to after isolated amplifier ACPL-782T and being proportional to bus voltage; ACS755LCB-050 selected by current sensor; All outside collection signals input through above interface concentration, ADINA1 ~ ADINA7 pin of access main control chip, then corrects by reference to the analog quantity of voltage (1.8V and 2.5V) and digital quantity thereof the bias error and gain error that are caused by the zero creep of main control chip in AD conversion process.
Hall signal resolves module 7, and embedded major-minor hall signal gathers port, and major-minor hall signal, after RC filtering and twice reverse process, accesses CAP1 ~ CAP6 pin of main control chip.Major-minor hall signal solution is counted as main control chip manner of comparison control register value by main control chip, with reference to wheel hub motor commutation phase sequence, exports the pwm signal corresponding with hall signal and carrys out driving power driver module.
Power driver module 8, embedded driving circuit and power inversion circuit, the PWM drive singal that main control chip exports, first through bus transceiver 74HC245, plays the effect changing drive signal level, improve drive singal load-carrying capacity and isolation drive module and main control module.Then, three road high-side switch signal PWM1, PWM3, PWM5 access HIN1, HIN2, HIN3 pin of driving chip IR2130 respectively, and three road low side switch signal PWM2, PWM4, PWM6 access HIN4, HIN5, HIN6 pin of driving chip IR2130 respectively.PWM drive singal is after driving chip, and its high-side switch signal demand boosts through bootstrap circuit, to reach the driving voltage of the power switch of power inverting module.PWM mode adopts pipe to modulate the normally closed unipolarity modulation of lower pipe, and this mode has modulating current and to pulse little advantage, and RC filter circuit can avoid voltage and current surge simultaneously, suppresses interference.
Wheel speed estimation block 9, main control module 5 triggers the capture interrupt of main control chip by the low and high level change of wheel hub motor hall signal, the interval time and the rotor that record adjacent twice interruption enclose the time of (number of pole-pairs is 20) through 1/120, estimated the wheel speed of wheel hub motor by said method, and the wheel speed of estimation is sent to car load wheel speed contrast module.
Power inverting switch breakdown fault diagnostic module 10, main control module 5 is by comparing the earth current power inverting switch breakdown fault of diagnosing the power inversion circuit of left front/right front/left back/off hind wheel driving governor whether equal to wheel hub motor conducting phase current.Because motor conducting phase and ground form the same circuit, therefore conducting phase current and to enter ground circuit inevitable equal; Otherwise if certain power switch of power inversion circuit is breakdown, wheel hub motor must be caused to occur short circuit mutually accordingly, short circuit phase current is zero, and obvious earth current is non-vanishing.
Major-minor hall signal redundancy check module 11, whether main control module 5 carries out signal redundancy verification by two groups of Hall elements that wheel hub motor carries and diagnoses left front/right front/left back/right back wheel hub motor Hall element to lose efficacy.
Major-minor hall signal sequence of rules correction verification module 12, the Changing Pattern of hall signal within the adjacent commutation cycle of wheel hub motor is fixing, and whether main control module 5 utilizes this fixing rule that the Hall element of left front/right front/left back/right back wheel hub motor can be diagnosed to lose efficacy.
Car load wheel speed contrast module 13, wheel speed estimation block is received to the wheel speed estimated value of left front/right front/left back/right back wheel hub motor by vehicle bus, if the relative error of the estimation wheel speed value of certain wheel hub motor exceedes threshold value, illustrate that corresponding wheel hub motor Hall element lost efficacy.
Fig. 2 represents correction process program flow diagram of the present utility model.Below in conjunction with calibrating method, correction process program flow diagram is described, the pass of the input analog voltage of AD conversion and the digital quantity after changing is:
V＝(D×3)/4095 (1)
In above formula, V is the analog voltage of input, and D is the digital quantity after conversion.
Analog voltage after formula (1) converts and virtual voltage in theory should equal and opposite in directions.If but there is zero creep in main control chip, then there is certain error with actual voltage value in the analog voltage after formula (1) converts, i.e. AD conversion error, the analog voltage (X) after formula (1) converts is expressed as with the corresponding relation (i.e. correction equation) of virtual voltage (Y):
Y＝KX+B (2)
In formula, K is gain error coefficient, and B is offset error coefficient.
Get two-way correction voltage (1.8V and 2.5V) and be converted into V by (1) formula again after AD conversion
1and V
2, finally (V
11.8) and (V
22.5) substitute into (2) formula, try to achieve gain error coefficient (K) and offset error coefficient (B).
K＝(2.5-1.8)/(V
2-V
1) (3)
B＝(2.5×V
1-1.8×V
2)/(V
2-V
1) (4)
Again gain error coefficient and offset error coefficient are substituted into (2) formula, like this, the analog voltage inverse iteration that the bus voltage signal of signal acquisition module collection, phase current and earth current signal convert after AD conversion is entered formula (2), above-mentioned signal virtual voltage accurately can be obtained through correction process.
Step S201 inputs two-way correction voltage, bus voltage signal, phase current and earth current signal.
Step S202 calculated gains error coefficient, computing formula is shown in formula (3).
Step S203 calculates offset error coefficient, and computing formula is shown in formula (4).
Step S204 substitutes into gain error coefficient and offset error coefficient draws correction equation, and computing formula is shown in formula (2).
Step S205 substitutes into correction equation bus voltage signal, phase current and earth current signal, draws the virtual voltage accurately after correction process.
Fig. 3 represents hall signal schematic diagram of the present utility model.This wheel hub motor is the Hall element of 60 ° with three mounting meanss, hall signal to be pulse width be 180 ° of electric angles, delayed 60 ° successively, dutycycle be 50% PWM waveform, rotor carries out 1 commutation every 60 ° of electric angles, and 6 commutations are a commutation cycle.During In-wheel motor driving pattern, in the commutation cycle, three road hall signals are 001,000,100,110,111,011, and corresponding wheel hub motor conducting is UW, UV, WV, WU, VU, VW mutually.During wheel hub motor braking mode, in the commutation cycle, three road hall signals are 011,111,110,100,000,001, and corresponding wheel hub motor conducting is WU, VU, VW, UW, UV, WV mutually.
Fig. 4 is power inversion circuit structured flowchart of the present utility model.Power inversion circuit is made up of six power inverting switches, and upper brachium pontis is made up of power inverting switch 1, power inverting switch 3 and power inverting switch 5, and lower brachium pontis is made up of power inverting switch 2, power inverting switch 4 and power inverting switch 6.
Fig. 5 is hall signal solver diagram of circuit of the present utility model.The low 12 bit data representatives of the manner of comparison control register of main control chip export the way of output of PWM1 ~ PWM6, binary number 10 represents high effectively (in modulation brachium pontis power inverting switch 1/3/5), high (often driving lower brachium pontis power inverting switch 2/4/6) is forced in 11 representatives, namely go up the PWM mode that the lower pipe of pipe modulation is normally closed, first judge the mode of operation of controller according to mode flags position.
If mode flags position is 1, then enter step S501 drive pattern, perform and drive phase sequence to resolve:
Hall signal enters step S503 when being 001, and manner of comparison control register value is 0C02 (0000110000000010), exports control signal PWM1/PWM6 driving power inverse switch 1/ power inverting switch 6.
Hall signal enters step S504 when being 000, and manner of comparison control register value is 00C2 (0000000011000010), exports control signal PWM1/PWM4 driving power inverse switch 1/ power inverting switch 4.
Hall signal enters step S505 when being 100, and manner of comparison control register value is 02C0 (0000001011000000), exports control signal PWM5/PWM4 driving power inverse switch 5/ power inverting switch 4.
Hall signal enters step S506 when being 110, and manner of comparison control register value is 020C (0000001000001100), exports control signal PWM5/PWM2 driving power inverse switch 5/ power inverting switch 2.
Hall signal enters step S507 when being 111, and manner of comparison control register value is 002C (0000000000101100), exports control signal PWM3/PWM2 driving power inverse switch 3/ power inverting switch 2.
Hall signal enters step S508 when being 011, and manner of comparison control register value is 0C20 (0000110000100000), exports control signal PWM3/PWM6 driving power inverse switch 3/ power inverting switch 6.
If mode flags position is 0, then enter step S502 braking mode, perform braking phase sequence and resolve:
Hall signal enters step S509 when being 001, and manner of comparison control register value is 020C (0000001000001100), exports control signal PWM5/PWM2 driving power inverse switch 5/ power inverting switch 2.
Hall signal enters step S510 when being 000, and manner of comparison control register value is 002C (0000000000101100), exports control signal PWM3/PWM2 driving power inverse switch 3/ power inverting switch 2.
Hall signal enters step S511 when being 100, and manner of comparison control register value is 0C20 (0000110000100000), exports control signal PWM3/PWM6 driving power inverse switch 3/ power inverting switch 6.
Hall signal enters step S512 when being 110, and manner of comparison control register value is 0C02 (0000110000000010), exports control signal PWM1/PWM6 driving power inverse switch 1/ power inverting switch 6.
Hall signal enters step S513 when being 111, and manner of comparison control register value is 00C2 (0000000011000010), exports control signal PWM1/PWM4 driving power inverse switch 1/ power inverting switch 4.
Hall signal enters step S514 when being 011, and manner of comparison control register value is 02C0 (0000001011000000), exports control signal PWM3/PWM6 driving power inverse switch 3/ power inverting switch 6.
Fig. 6 is power inverting switch breakdown fault diagnostic program diagram of circuit of the present utility model.
Hall signal enters step S601 when being 001, and wheel hub motor conducting is UW mutually, U phase current under normal circumstances=W phase current=earth current; If U phase current ≠ earth current, illustrate that power inverting switch 1 punctures and cause U phase current=0; If W phase current ≠ earth current, illustrate that power inverting switch 6 punctures and cause W phase current=0.
Hall signal enters step S602 when being 000, and wheel hub motor conducting is UV mutually, U phase current under normal circumstances=V phase current=earth current; If U phase current ≠ earth current, illustrate that power inverting switch 1 punctures and cause U phase current=0; If V phase current ≠ earth current, illustrate that power inverting switch 4 punctures and cause V phase current=0.
Hall signal enters step S603 when being 100, and wheel hub motor conducting is WV mutually, W phase current under normal circumstances=V phase current=earth current; If W phase current ≠ earth current, illustrate that power inverting switch 5 punctures and cause W phase current=0; If V phase current ≠ earth current, illustrate that power inverting switch 4 punctures and cause V phase current=0.
Hall signal enters step S604 when being 110, and wheel hub motor conducting is WU mutually, W phase current under normal circumstances=U phase current=earth current; If W phase current ≠ earth current, illustrate that power inverting switch 5 punctures and cause W phase current=0; If U phase current ≠ earth current, illustrate that power inverting switch 2 punctures and cause U phase current=0.
Hall signal enters step S605 when being 111, and wheel hub motor conducting is VW mutually, V phase current under normal circumstances=W phase current=earth current; If V phase current ≠ earth current, illustrate that power inverting switch 3 punctures and cause V phase current=0; If W phase current ≠ earth current, illustrate that power inverting switch 2 punctures and cause W phase current=0.
Hall signal enters step S606 when being 011, and wheel hub motor conducting is VU mutually, V phase current under normal circumstances=U phase current=earth current; If V phase current ≠ earth current, illustrate that power inverting switch 3 punctures and cause V phase current=0; If U phase current ≠ earth current, illustrate that power inverting switch 6 punctures and cause U phase current=0.
By above method, which power inverting switch in power inversion circuit can be diagnosed out exactly breakdown.
Fig. 7 is major-minor hall signal sequence of rules checking routine diagram of circuit of the present utility model.In commutation cycle during In-wheel motor driving, three road hall signals are 001,000,100,110,111,011, and this is hall signal sequence of rules.
Step S701 reads a upper moment hall signal.
Whether the hall signal that step S702 determining step S701 reads meets hall signal sequence of rules, if do not meet or exceed hall signal sequence of rules, illustrating in three road hall signals has at least a road to break down, and judges that wheel hub motor Hall element lost efficacy accordingly.
Step S703 ~ S708 is setting hall signal sequence of rules.
Step S703 is the hall signal in a moment on setting hall signal 001 is 011.
Step S704 is the hall signal in a moment on setting hall signal 000 is 001.
Step S705 is the hall signal in a moment on setting hall signal 100 is 000.
Step S706 is the hall signal in a moment on setting hall signal 110 is 100.
Step S707 is the hall signal in a moment on setting hall signal 111 is 110.
Step S708 is the hall signal in a moment on setting hall signal 011 is 111.
Fig. 8 is wheel speed estimation program diagram of circuit of the present utility model.The number of pole-pairs of wheel hub motor is 20, therefore rotor often triggers 120 interruptions (namely each rotor that interrupts is through 1/120 turn) through 1 turn, and the interval time occurred by calculating adjacent twice interruption estimates motor speed.
Step S801 reads the count value of capture interrupt generation last time moment counting machine.
Step S802 records the count value that moment counting machine occurs current capture interrupt.
Next, judge whether current capture interrupt generation hour counter overflows, and namely timer count value is more than 65535, judge whether to overflow by inquiry timer period interrupt flag bit.
If occur to overflow, entering step S803, there is the number of times overflowed in record.
The interval time of adjacent twice interruption in step S804 calculating generation spilling situation, computing formula is: count value+spilling number of times × 65535 of moment counting machine occur count value during count difference=current time generation capture interrupt of adjacent twice interruption-last time capture interrupt, then are multiplied by the interval time that the count cycle can obtain adjacent twice interruption.
If do not occur to overflow, enter step S805 step, calculate the interval time of adjacent twice interruption under there is not spilling situation, computing formula is: the count value of moment counting machine occurs count value during count difference=current time generation capture interrupt of adjacent twice interruption-last time capture interrupt, then is multiplied by the interval time that the count cycle can obtain adjacent twice interruption.
Step S806 upgrades the count value of capture interrupt counting machine.
Step S807 calculates wheel speed, and computing formula is: wheel speed=60.0/ (1.7 × 10
-6the interval time of × 120 × adjacent twice interruption), wherein 1.7 × 10
-6for the count cycle, constant 120 is that rotor often forwards raw 120 times through one and interrupts, then unit revolutions per second is converted to rev/min by multiplication by constants 60.
Claims (6)
1. a drive system of electric automobile trouble diagnosing Centralized Controller, possesses:
Main control module, embedded main control chip and minimum circuit thereof;
Acquisition of signal correction module, embedded bus voltage gathers port, current acquisition port, correction voltage collection port, is revised the AD conversion error caused by main control chip zero creep by correction process simultaneously;
Hall signal resolves module, gathers major-minor hall signal and its solution is counted as main control chip manner of comparison control register value, makes it to export corresponding pwm signal with reference to wheel hub motor commutation phase sequence;
Power driver module, embedded driving circuit and power inversion circuit, hold mutually at ground end and wheel hub motor and add current sensor collection earth current and phase current;
Wheel speed estimation block, by the wheel speed of wheel hub motor hall signal estimation wheel hub motor;
For the power switch breakdown fault of power inversion circuit, devise power inverting switch breakdown fault diagnostic module;
For wheel hub motor Hall element failure of removal, devise major-minor hall signal redundancy check module, major-minor hall signal sequence of rules correction verification module and car load wheel speed contrast module;
Wherein, main control module, acquisition of signal correction module, hall signal resolve module, power driver module, wheel speed estimation block, power inverting switch breakdown fault diagnostic module, major-minor hall signal redundancy check module and major-minor hall signal sequence of rules correction verification module and are embedded in left front/right front/left back/off hind wheel driving governor; Car load wheel speed contrast module receives left front/right front/left back/off hind wheel wheel speed by vehicle bus, and carries out wheel speed contrast in entire car controller.
2. drive system of electric automobile trouble diagnosing Centralized Controller according to claim 1, it is characterized in that, described signal correction process: solve by reference to the analog quantity of voltage and digital quantity thereof the gain error coefficient and offset error coefficient that exist in AD conversion process, and correct with it AD conversion error caused by main control chip zero drift.
3. drive system of electric automobile trouble diagnosing Centralized Controller according to claim 1, it is characterized in that, described power inverting switch breakdown fault diagnostic module: because motor conducting phase and ground form the same circuit, therefore conducting phase current and to enter ground circuit inevitable equal; Otherwise if certain power switch of power inversion circuit is breakdown, wheel hub motor must be caused to occur short circuit mutually accordingly, short circuit phase current is zero, and obvious earth current is non-vanishing; By comparing the earth current power inverting switch breakdown fault of diagnosing left front/right front/left back/off hind wheel driving governor whether equal to wheel hub motor conducting phase current.
4. drive system of electric automobile trouble diagnosing Centralized Controller according to claim 1, it is characterized in that, described major-minor hall signal redundancy check module: the two groups of Hall elements carried by wheel hub motor are carried out redundant diagnostic and judge whether the Hall element of left front/right front/left back/right back wheel hub motor lost efficacy.
5. drive system of electric automobile trouble diagnosing Centralized Controller according to claim 1, it is characterized in that, whether described major-minor hall signal sequence of rules correction verification module: wheel hub motor hall signal Changing Pattern within the adjacent commutation cycle is fixing, utilize this fixing rule that the Hall element of left front/right front/left back/right back wheel hub motor can be diagnosed to lose efficacy.
6. drive system of electric automobile trouble diagnosing Centralized Controller according to claim 1, it is characterized in that, described car load wheel speed contrast module: receive wheel speed estimation block to the wheel speed estimated value of left front/right front/left back/right back wheel hub motor by vehicle bus, if the relative error of the estimation wheel speed value of certain wheel hub motor exceedes threshold value, illustrate that corresponding wheel hub motor Hall element lost efficacy.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104149628A (en) * | 2014-09-04 | 2014-11-19 | 吉林大学 | Electric automobile driving system fault diagnosis centralized controller |
| CN106877749A (en) * | 2017-03-29 | 2017-06-20 | 北京恒源新动力科技有限公司 | A kind of four electric machine controllers and data checking method for electric automobile |
| CN109733245A (en) * | 2019-02-15 | 2019-05-10 | 上海蔚来汽车有限公司 | Electric car is set to continue the method for charging after firmware updating or software |
| CN111762138A (en) * | 2020-07-02 | 2020-10-13 | 南京汽车集团有限公司 | Commercial vehicle wheel speed signal checking method |
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2014
- 2014-09-04 CN CN201420509347.4U patent/CN204095556U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104149628A (en) * | 2014-09-04 | 2014-11-19 | 吉林大学 | Electric automobile driving system fault diagnosis centralized controller |
| CN104149628B (en) * | 2014-09-04 | 2016-05-04 | 吉林大学 | A kind of drive system of electric automobile fault diagnosis Centralized Controller |
| CN106877749A (en) * | 2017-03-29 | 2017-06-20 | 北京恒源新动力科技有限公司 | A kind of four electric machine controllers and data checking method for electric automobile |
| CN109733245A (en) * | 2019-02-15 | 2019-05-10 | 上海蔚来汽车有限公司 | Electric car is set to continue the method for charging after firmware updating or software |
| CN111762138A (en) * | 2020-07-02 | 2020-10-13 | 南京汽车集团有限公司 | Commercial vehicle wheel speed signal checking method |
| CN111762138B (en) * | 2020-07-02 | 2022-03-11 | 南京汽车集团有限公司 | Commercial vehicle wheel speed signal checking method |
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