CN109591615A - A kind of electric vehicle controller active thermal control method and its application system - Google Patents
A kind of electric vehicle controller active thermal control method and its application system Download PDFInfo
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- CN109591615A CN109591615A CN201811307112.6A CN201811307112A CN109591615A CN 109591615 A CN109591615 A CN 109591615A CN 201811307112 A CN201811307112 A CN 201811307112A CN 109591615 A CN109591615 A CN 109591615A
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- collection circuit
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L15/00—Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L15/00—Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles
- B60L15/20—Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles for control of the vehicle or its driving motor to achieve a desired performance, e.g. speed, torque, programmed variation of speed
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/64—Electric machine technologies in electromobility
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/72—Electric energy management in electromobility
Abstract
The invention discloses a kind of electric vehicle controller active thermal control methods, including fuzzy controller, motor vector control system, DSP28035 processor, driving circuit, temperature collection circuit, current collection circuit, voltage collection circuit, SCI communication, host computer, three-phase inverter, the output of temperature sensing circuit is connected with the AD pin of DSP28035 processor, DSP28035 processor is communicated by SCI and is connect with host computer, pass through temperature collection circuit, DSP28035 processor measures the actual temperature of controller in real time, and real-time temperature values are passed to the controller temperature closed loop fuzzy controller realized based on software form, the maximum limit value of the torque current in reasonable motor vector control system is calculated, to realize to controller temperature active heat management.The present invention solves the problems, such as that existing electric vehicle controller temperature protection is overly conservative, electric car load capacity is low, effectively reduces electric vehicle controller rate of breakdown caused by overheat, while improving electric car load capacity.
Description
Technical field
The invention belongs to electrical automobile electric machines control technologies, and in particular to a kind of controller active thermal control method and its application
System.
Background technique
With the development of power electronics technology, MOSFET, IGBT constant power device obtain in Control of Electric Vehicles field
It is extensive to use.Its package dimension is gradually reduced, but power grade and heat flow density require to step up, Yi Fashengyin high temperature
Caused various failure of removal, to influence the service life and reliability of electric machine controller.Therefore, it is necessary to by adopting in real time
The operating temperature for collecting controller realizes corresponding active thermal control and overheating protection, improves its operational reliability and preferably drive
Sail experience.
Traditional industry motor difference, needs motor that can quickly improve in a short time under the operating conditions such as climbing, obstacle detouring
Power output needs electric car induction machine to have detent torque big to obtain excellent driving experience, momentary output ability,
Meanwhile also requiring controller and motor that there is higher power density grade.But big torque operation needs Control of Electric Vehicles
Device exports bigger electric current, to make motor temperature rising rapidly, the power device fever in controller is seriously its reliable fortune
Row brings security risk.Cause motor damage, the power device in controller because of temperature because motor temperature is excessively high in order to prevent
Excessively high and generation situations such as lead to thermal breakdown, in existing electric vehicle controller Thermal protection, it will usually which a temperature is set
Point is protected, once the temperature that feedback obtains is more than this setting value, electric current drop half amount will be allowed to run, to prevent the hot mistake of motor
It carries.However, existing temperature protection measure be usually passive type protection, for temperature protection than more conservative.Existing control
In device temperature protection, the probe of temperature sensor is all disposed on the outer casing inner wall of controller, is not directly placed at heat release
On the power amplifier board of most serious, this results in the measured shell temperature that can not be accurately reflected when current power device works to temperature
Degree, so that overheat protector quickly accurately cannot be carried out to the power device that obtains in electric vehicle controller.Meanwhile existing temperature
Spend closed loop use is all traditional PI controller, is not able to satisfy the demand that electric car obstacle detouring instantaneously exports big torque, once
When the temperature of controller is more than threshold value, traditional PI controller response speed is slower, to cannot completely guarantee electric car
The temperature of controller is rapidly reduced to threshold value hereinafter, the reliability service for electric vehicle controller brings security risk.
Summary of the invention
The purpose of the present invention is to provide a kind of controller active thermals to control method and its application system, solves existing electricity
The overly conservative problem of power device fan-out capability under electrical automobile controller heat protection method.
The technical solution for realizing the aim of the invention is as follows: a kind of electric vehicle controller active thermal control method, control
Method and step is as follows:
Step 1, dsp processor according to temperature collection circuit, current collection circuit, voltage collection circuit Real-time Feedback signal,
6 road PWM voltage drive signals are exported, power amplification is carried out to driving signal through overdrive circuit, is exported to three-phase inverter；
In step 2, motor vector control system Clark transformation and Park transformation by the two-phase stator current ia of asynchronous machine,
Ib is converted into electric current iq, id under two-phase rotating coordinate system；Flux observer is calculated according to the revolving speed n of iq, id and asynchronous machine
Obtain field orientation angle θ；The switching time of U, V, W three-phase upper and lower bridge arm in three-phase inverter is calculated according to SVPWM algorithm
Ta, Tb, Tc export three-phase current ia, ib, ic by control three-phase inverter and drive asynchronous machine；
The temperature for the three-phase inverter that step 3, fuzzy controller are obtained according to feedback, is calculated the limit value L_ of q shaft current
Lim limits q shaft current closed loop.
In the step 3, the input of fuzzy controller is the real-time temperature of three-phase inverter of temperature collection circuit acquisition
Value, by the way that margin of error E and error rate EC is calculated compared with the temperature threshold of setting, fuzzy logic is passed through in output
Algorithm determines, under error current amount and error rate, the maximum limit value I_lim of torque current.
A kind of system using electric vehicle controller active thermal control method, including fuzzy controller, motor vector control
It is system processed, dsp processor, driving circuit, temperature collection circuit, current collection circuit, voltage collection circuit, SCI communication, upper
Machine；The motor vector control system includes asynchronous machine, three-phase inverter, SVPWM algorithm, q shaft current closed loop integral device, turns
Fast closed loop integral device, flux observer, Park transformation, Clark transformation, d shaft current closed loop integral device；The motor vector controlled
System includes asynchronous machine, three-phase inverter, SVPWM algorithm, q shaft current closed loop integral device, speed closed loop integrator, magnetic linkage sight
Survey device, Park transformation, Clark transformation, d shaft current closed loop integral device and clipping module；The input of Clark transformation connects asynchronous electricity
Biphase current ia, ib of machine, output are connected to Park transformation；The input of flux observer is converted with asynchronous machine and Park respectively
It is connected, output is connected to Park transformation and SVPWM algorithm；The input of d shaft current closed loop integral device and exciting current given value id_
Ref is connected with the difference signal of exciting current feedback value id, and output is connected to SVPWM algorithm；The input of speed closed loop integrator
It is connect with the difference signal of the given value n_ref of revolving speed and speed feedback value n, output connection clipping module；Q shaft current closed loop product
The input of device is divided to connect with the difference signal of torque current reference iq_ref and torque current feedback value iq, output is connected to
SVPWM algorithm；SVPWM algorithm is connected with d shaft current closed loop integral device, q shaft current closed loop integral device and asynchronous machine respectively,
Output is connected to three-phase inverter；The output of three-phase inverter is connected to asynchronous machine；The input of fuzzy controller connects three-phase
Inverter, output are connected with clipping module.
The temperature collection circuit, current collection circuit, voltage collection circuit respectively with the AD pin phase of dsp processor
Even；SCI is communicated to be connected with the SCI of dsp processor communication pin；The temperature collection circuit acquire respectively environment temperature,
The MOSFET shell temperature of U, V, W three-phase of the shell temperature and three-phase inverter of entire controller, and collected temperature is subjected to mould
Number conversion generates digital signal, and is sent to dsp processor for digital signal is generated；The current collection circuit is adopted respectively
The electric current of acquisition is carried out analog-to-digital conversion by current collection circuit by U, V, W three-phase current for collecting asynchronous machine, and by generation
Digital signal is sent to dsp processor；The direct current power source voltage at the voltage collection circuit acquisition three-phase inverter both ends, will
Collected voltage carries out analog-to-digital conversion, and the digital model of generation is sent to dsp processor；The dsp processor pair
Collected temperature, electric current, voltage digital signal are handled, and are converted into actual value, and communicate collected letter by SCI
Number it is transferred to the host computer on backstage.
Compared with prior art, the present invention its remarkable advantage is:
(1) compared with traditional passive heat protection method, power device fan-out capability can be significantly improved, instantaneously export big torque
The utilization rate of ability and the energy.
(2) can effectively in smooth control device power device temperature fluctuation, reduce power device repeatedly plus hot and cold
But component failure probability caused by the repeated stock of receiving thermal stress during.
(3) control algolithm strong antijamming capability used by, fast response time do not need the mould of specific controlled device
Type, and have stronger robustness to the variation of system parameter.
Detailed description of the invention
Fig. 1 is a kind of structural schematic diagram based on motor vector control system of the invention.
Fig. 2 is hardware system composed structure schematic diagram of the invention.
Fig. 3 is temperature sensing circuit structural schematic diagram of the invention.
Fig. 4 is current detection circuit structural schematic diagram of the invention.
Fig. 5 is voltage detecting circuit structural schematic diagram of the invention.
Fig. 6 is three-phase inverter topological structure schematic diagram of the invention.
Fig. 7 is driving circuit structure schematic diagram of the invention.
Specific embodiment
Present invention is further described in detail with reference to the accompanying drawing.
A kind of electric vehicle controller active thermal control method of the present invention, steps are as follows for control method:
Step 1, DSP28035 processor 3 are anti-in real time according to temperature collection circuit 5, current collection circuit 6, voltage collection circuit 7
The signal of feedback exports 6 road PWM voltage drive signals, carries out power amplification to driving signal through overdrive circuit 4, exports to three
Phase inverter 22；
Clark in step 2, motor vector control system 2 converts 28 and Park transformation 27 for the two-phase stator of asynchronous machine 21
Electric current ia, ib are converted into electric current iq, id under two-phase rotating coordinate system；Flux observer 26 is according to iq, id and asynchronous machine 21
Revolving speed n field orientation angle θ is calculated；It is calculated in three-phase inverter 22 above and below U, V, W three-phase according to SVPWM algorithm 23
Switching time Ta, Tb, Tc of bridge arm export three-phase current ia, ib, ic by control three-phase inverter 22 and drive asynchronous machine
21；
The temperature for the three-phase inverter 22 that step 3, fuzzy controller 1 are obtained according to feedback, is calculated the limit value of q shaft current
L_lim limits q shaft current closed loop.
In conjunction with Fig. 1 to Fig. 6, a kind of system using electric vehicle controller active thermal control method, it is characterised in that: packet
Include fuzzy controller 1, motor vector control system 2, DSP28035 processor 3, driving circuit 4, temperature collection circuit 5, electric current
Acquisition Circuit 6, voltage collection circuit 7, SCI communicate 8, host computer 9.
As shown in Figure 1, the motor vector control system 2 includes asynchronous machine 21, three-phase inverter 22, SVPWM algorithm
23, q shaft current closed loop integral device 24, speed closed loop integrator 25, flux observer 26, Park transformation 27, Clark convert 28, d
Shaft current closed loop integral device 29 and clipping module.Biphase current ia, ib of the input connection asynchronous machine 21 of Clark transformation 28,
Output is connected to Park transformation 27；The input of flux observer 26 is connected with asynchronous machine 21 and Park transformation 27 respectively, exports
It is connected to Park transformation 27 and SVPWM algorithm 23；The input of d shaft current closed loop integral device 29 and exciting current given value id_ref
It is connected with the difference signal of exciting current feedback value id, output is connected to SVPWM algorithm 23；The input of speed closed loop integrator 25
It is connect with the difference signal of the given value n_ref of revolving speed and speed feedback value n, output connection clipping module；Q shaft current closed loop product
The input of device 24 is divided to connect with the difference signal of torque current reference iq_ref and torque current feedback value iq, output is connected to
SVPWM algorithm 23；SVPWM algorithm 23 respectively with d shaft current closed loop integral device 29, q shaft current closed loop integral device 24 and asynchronous
Motor 21 is connected, and output is connected to three-phase inverter 22；The output of three-phase inverter 22 is connected to asynchronous machine 22；Fuzzy control
The input of device 1 connects three-phase inverter 22, and output is connected with clipping module.
Specifically, the input of the described Clark transformation 28 is two-phase stator current ia, ib of asynchronous machine 21, and by its
Stator current ial, the ibe being converted under two-phase stationary coordinate system, the stator current under static coordinate is using Park transformation 27
The torque current iq that is converted under the two-phase rotating coordinate system of space and exciting current id, Park transformation 27 are exported to magnetic linkage
Observer 26.The input of flux observer 26 is the revolving speed n that torque current iq, exciting current id and asynchronous machine 21 are fed back,
Field orientation angle θ is exported by calculating, and by the field orientation angle Real-time Feedback to SVPWM algorithm 23 and Park transformation 27.It gives
Fixed exciting current is compared with reference to id_ref by the way that exciting current id is calculated in real time with Park transformation 27, by the two
Difference export to d shaft current closed loop integral device 29, the reference d of SVPWM algorithm 23 is exported by d shaft current closed loop integral device 29
Shaft voltage Ud.Meanwhile given speed reference n_ref is by compared with the revolving speed n signal that asynchronous machine 21 is fed back, by the two
Difference export to speed closed loop integrator 25, the output of speed closed loop integrator 25 obtains torque current reference by clipping
iq_ref.Further, the amplitude limit value is obtained by the output of fuzzy controller 1, and the input of fuzzy controller 1 is connection three
The real time temperature of phase inverter 22 feeds back T_fd.Resulting torque current is with reference to iq_ref by calculating in real time with Park transformation 27
It obtains to torque current iq being compared, exports difference to q shaft current closed loop integral device 24, by q shaft current closed loop integral device
Output obtains the reference q shaft voltage Uq of SVPWM algorithm 23.Finally, the DC bus that SVPWM algorithm is fed back according to asynchronous machine 21
Voltage UDC, torque voltage Uq and excitation voltage Ud calculate to obtain the upper and lower bridge arm conducting switching of U, V, W three-phase in three-phase inverter 22
Time Ta, Tb, Tc, so that three-phase inverter 22 be driven to export suitable three-phase current ia, ib, ic to asynchronous machine 21.
The temperature fuzzy controller 1 is the two-dimensional fuzzy controller realized based on software form, and and asynchronous machine
Vector control system 2 combines, and for the fuzzy logic algorithm in the temperature fuzzy controller 1 using look-up table, it can
To obtain by off-line calculation, the processing speed of processor can be greatly improved.
The input of the fuzzy controller 1 is the real-time temperature value of three-phase inverter 22 that temperature collection circuit 5 acquires,
By the way that margin of error E and error rate EC is calculated compared with the temperature threshold of setting, output is calculated by fuzzy logic
Method determines:
When the actual temperature that comparison result is three-phase inverter 22 is greater than the temperature threshold of setting, the fuzzy controller 1
The limit value I_lim of torque current will be reduced；
When the actual temperature of three-phase inverter 22 is less than the temperature threshold of setting, fuzzy controller 1 will increase torque current
Limit value I_lim；
When the actual temperature of three-phase inverter 22 is equal to the temperature threshold of setting, fuzzy controller 1 is by the restriction of torque current
Value I_lim is remained unchanged.
Specifically, the temperature collection circuit 5, current collection circuit 6, voltage collection circuit 7 are respectively and at DSP28035
The AD pin for managing device 3 is connected；SCI communication 8 is connected with the SCI of DSP28035 processor 3 communication pin；The temperature acquisition
Circuit 5 acquires the MOSFET shell of U, V, W three-phase of environment temperature, the shell temperature of entire controller and three-phase inverter 22 respectively
Temperature, and collected temperature is subjected to analog-to-digital conversion, digital signal is generated, and be sent to digital signal is generated at DSP28035
Manage device 3；The current collection circuit 6 acquires U, V, W three-phase current of asynchronous machine 21 respectively, passes through current collection circuit 6
The electric current of acquisition is subjected to analog-to-digital conversion, and the digital signal of generation is sent to DSP28035 processor 3；The voltage is adopted
Collector 7 acquires the direct current power source voltage at 22 both ends of three-phase inverter, collected voltage is carried out analog-to-digital conversion, and will generate
Digital model be sent to DSP28035 processor 3；The DSP28035 processor 3 is to collected temperature, electric current, voltage
Digital signal is handled, and actual value is converted into, and collected signal is transferred to the host computer on backstage by SCI communication 8
9。
Further, the temperature of collected three-phase inverter 22 is sent to by the temperature collection circuit 5
DSP28035 processor 3, carrying out judgement output by temperature fuzzy controller 1, motor vector control system 2 suitably turns at this time
Square current limit value.
As shown in figure 3, the temperature collection circuit 5 includes 3.3V power supply 53, the first divider resistance 54, the first filtered electrical
Road 52, the first overvoltage crowbar 51, thermistor 228.Thermistor 228 is connected with the first divider resistance 54, one end ground connection
One end connects the first divider resistance 54, and one end that thermistor 228 is not grounded is connected to the first filter circuit 52, by first
The sample voltage value that filter circuit 52 will enter into the ADCINB0 pin of DSP28035 digital processing unit 3 is filtered into stable voltage
Value, improves the accuracy of sampling.Filtered voltage signal is connected to DSP28035 number by the first overvoltage crowbar 51
The ADCINB0 pin of processor 3, the effect of the first overvoltage crowbar 51 are to guarantee input DSP28035 digital processing unit 3
The voltage of ADCINB0 pin is not more than 3.3V, to protect the normal work of processor.
As shown in figure 4, the current collection circuit 6 includes current sensor 61, the second filter circuit 62, the second over-voltage
Protect circuit 63.Current sensor 61 exports corresponding voltage digital signal according to the current value of acquisition target, and output is connected to
Second filter circuit 62 will enter into the ADCINA0 pin voltage of DSP28035 digital processing unit 3 by the second filter circuit 62
Value filter improves the accuracy of sampling at stable voltage value.Filtered voltage signal connects by the second overvoltage crowbar 63
It is connected to the ADCINA0 pin of DSP28035 digital processing unit 3, the effect of the second overvoltage crowbar 63 is to guarantee input
The voltage of the ADCINA0 pin of DSP28035 digital processing unit 3 is not more than 3.3V, to protect the normal work of processor.
As shown in figure 5, the voltage collection circuit 7 includes the second divider resistance 71, third divider resistance 74, third filter
Wave circuit 72 and third overvoltage crowbar 73.Wherein, the second divider resistance 71 and third divider resistance 74 are connected, third partial pressure
One end ground connection other end of resistance 74 connects the second divider resistance 71 and third filter circuit 72.Third filter circuit 72 is by third
The level signal at 74 both ends of divider resistance is filtered at stable voltage value, to improve the accuracy of sampling.Filtered voltage letter
Number the ADCINB1 pin of DSP28035 digital processing unit 3, third overvoltage protection electricity are connected to by third overvoltage crowbar 73
The effect on road 73 is to guarantee the voltage of the ADCINB1 pin of input DSP28035 digital processing unit 3 no more than 3.3V, to protect
The normal work of processor.
As shown in fig. 6, the driving circuit 4 mainly includes 12V power supply 41, driving chip 42.Wherein 12V power supply 41 with
The VCC pin of driving chip 42, which connects, gives chip power supply, 6 road pwm signal PWM1A, PWM1B of input, PWM2A, PWM2B,
PWM3A, PWM3B are connected with the IN pin of chip, the HO pin of 6 road pwm signal 1A, 1B, 2A, 2B, 3A, 3B and chip of output
It is connected, the 6 road PWM voltage drive signals that the driving chip 42 exports DSP28035 processor 3 carry out power amplification, from
And the normal work of three-phase inverter 22 can be driven.
As shown in fig. 7, the three-phase inverter 22 mainly includes DC power supply 221, the first MOSFET 222, second
MOSFET 223, the 3rd MOSFET 224, the 4th MOSFET 225, the 5th MOSFET 226, the 6th MOSFET 227.Wherein
The drain electrode of one MOSFET 222, the 3rd MOSFET 224 and the 5th MOSFET 226 are connected to the anode of DC power supply 221, and second
The source electrode of MOSFET 223, the 4th MOSFET 225 and the 6th MOSFET 227 are connected to the cathode of DC power supply 221, and first
The source electrode of MOSFET 222 be connected with the drain electrode of the 2nd MOSFET 223 constitute U phase bridge arm, the 3rd MOSFET 224 source electrode with
The leakage of the connected composition V phase bridge arm that drains, the source electrode and the 6th MOSFET 227 of the 5th MOSFET 226 of 4th MOSFET 225
Extremely it is connected and constitutes V phase bridge arm.By giving the gate pole of this six MOSFET pipes to apply suitable driving signal, three-phase can be generated
Symmetrical voltage, to drive the operation of asynchronous machine 21.
Claims (7)
1. a kind of electric vehicle controller active thermal control method, which is characterized in that steps are as follows for control method:
Step 1, dsp processor (3) are real-time according to temperature collection circuit (5), current collection circuit (6), voltage collection circuit (7)
The signal of feedback exports 6 road PWM voltage drive signals, carries out power amplification, output to driving signal through overdrive circuit (4)
Give three-phase inverter (22)；
Clark transformation (28) and Park in step 2, motor vector control system (2) convert (27) for asynchronous machine (21)
Two-phase stator current ia, ib are converted into electric current iq, id under two-phase rotating coordinate system；Flux observer (26) according to iq, id and
Field orientation angle θ is calculated in the revolving speed n of asynchronous machine (21)；Three-phase inverter is calculated according to SVPWM algorithm (23)
(22) switching time Ta, Tb, Tc of U, V, W three-phase upper and lower bridge arm in export three-phase current by control three-phase inverter (22)
Ia, ib, ic drive asynchronous machine (21)；
The temperature for the three-phase inverter (22) that step 3, fuzzy controller (1) are obtained according to feedback, is calculated the limit of q shaft current
Definite value L_lim limits q shaft current closed loop.
2. electric vehicle controller active thermal control method according to claim 1, it is characterised in that: in the step 3,
The input of fuzzy controller (1) be temperature collection circuit (5) acquisition three-phase inverter (22) real-time temperature value, by with set
Margin of error E and error rate EC is calculated in the comparison of fixed temperature threshold, and output determines by fuzzy logic algorithm,
Under error current amount and error rate, the maximum limit value I_lim of torque current.
3. electric vehicle controller active thermal control method according to claim 2, it is characterised in that: in the step 3,
The input of fuzzy controller (1) be temperature collection circuit (5) acquisition three-phase inverter (22) real-time temperature value, by with set
Margin of error E and error rate EC is calculated in the comparison of fixed temperature threshold, and output determines by fuzzy logic algorithm:
When the actual temperature that comparison result is three-phase inverter (22) is greater than the temperature threshold of setting, the fuzzy controller
(1) the limit value I_lim of torque current will be reduced；
When the actual temperature of three-phase inverter (22) is less than the temperature threshold of setting, fuzzy controller (1) will increase torque electricity
The limit value I_lim of stream；
When the actual temperature of three-phase inverter (22) is equal to the temperature threshold of setting, fuzzy controller (1) is by torque current
Limit value I_lim is remained unchanged.
4. electric vehicle controller active thermal control method described in any one of -3 according to claim 1, it is characterised in that:
The temperature fuzzy controller (1) is the two-dimensional fuzzy controller realized based on software form, and and Vector Control System of Induction Motor
System (2) combines.
5. electric vehicle controller active thermal control method according to claim 1, it is characterised in that: at the DSP
It manages device (3) and uses DSP28035 processor.
6. electric vehicle controller active thermal control method described in any one of -5 according to claim 1, it is characterised in that:
Fuzzy logic algorithm in the temperature fuzzy controller (1) is obtained by off-line calculation, is greatly improved using look-up table
The processing speed of processor.
7. a kind of system using electric vehicle controller active thermal control method described in any one of claim 1-6,
It is characterized by comprising fuzzy controller (1), motor vector control system (2), dsp processor (3), driving circuit (4), temperature
Spend Acquisition Circuit (5), current collection circuit (6), voltage collection circuit (7), SCI communication (8), host computer (9)；The motor arrow
Amount control system (2) includes asynchronous machine (21), three-phase inverter (22), SVPWM algorithm (23), q shaft current closed loop integral device
(24), speed closed loop integrator (25), flux observer (26), Park transformation (27), Clark convert (28), d shaft current closed loop
Integrator (29)；The motor vector control system (2) includes asynchronous machine (21), three-phase inverter (22), SVPWM algorithm
(23), q shaft current closed loop integral device (24), speed closed loop integrator (25), flux observer (26), Park transformation (27),
Clark converts (28), d shaft current closed loop integral device (29) and clipping module；The input that Clark converts (28) connects asynchronous machine
(21) biphase current ia, ib, output are connected to Park transformation (27)；The input of flux observer (26) respectively with asynchronous machine
(21) it is connected with Park transformation (27), output is connected to Park transformation (27) and SVPWM algorithm (23)；D shaft current closed loop integral
The input of device (29) is connect with the difference signal of exciting current given value id_ref and exciting current feedback value id, and output is connected to
SVPWM algorithm (23)；The difference of the input of speed closed loop integrator (25) and the given value n_ref of revolving speed and speed feedback value n
Signal connection, output connection clipping module；The input of q shaft current closed loop integral device (24) and torque current reference iq_ref and
The difference signal of torque current feedback value iq connects, and output is connected to SVPWM algorithm (23)；SVPWM algorithm (23) respectively with d
Shaft current closed loop integral device (29), q shaft current closed loop integral device (24) are connected with asynchronous machine (21), and output is connected to three contraries
Become device (22)；The output of three-phase inverter (22) is connected to asynchronous machine (22)；The input of fuzzy controller (1) connects three contraries
Become device (22), output is connected with clipping module；
The temperature collection circuit (5), current collection circuit (6), voltage collection circuit (7) AD with dsp processor (3) respectively
Pin is connected；SCI communicates (8) and is connected with the SCI of dsp processor (3) communication pin；The temperature collection circuit (5) point
Not Cai Ji environment temperature, the shell temperature of entire controller and three-phase inverter (22) U, V, W three-phase MOSFET shell temperature, and will
Collected temperature carries out analog-to-digital conversion, generates digital signal, and be sent to dsp processor (3) for digital signal is generated；It is described
Current collection circuit (6) acquire U, V, W three-phase current of asynchronous machine (21) respectively, will be adopted by current collection circuit (6)
The electric current of collection carries out analog-to-digital conversion, and the digital signal of generation is sent to dsp processor (3)；The voltage collection circuit
(7) collected voltage is carried out analog-to-digital conversion by the direct current power source voltage for acquiring three-phase inverter (22) both ends, and by generation
Digital model is sent to dsp processor (3)；The dsp processor (3) is to collected temperature, electric current, voltage digital signal
It is handled, is converted into actual value, and collected signal is transferred to the host computer (9) on backstage by SCI communication (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811307112.6A CN109591615B (en) | 2018-11-05 | 2018-11-05 | Active heat control method of electric automobile controller and application system thereof |
Applications Claiming Priority (1)
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| CN114312348A (en) * | 2021-12-30 | 2022-04-12 | 安徽鸿创新能源动力有限公司 | Motor controller based on MOS power semiconductor |
| CN116707290A (en) * | 2023-08-08 | 2023-09-05 | 如果新能源科技(江苏)股份有限公司 | Over-temperature protection method for power conversion device and power conversion device |
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| CN109591615B (en) | 2022-03-25 |
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