CN102706564A - Motor test system and control method for electric vehicle - Google Patents
Motor test system and control method for electric vehicle Download PDFInfo
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- CN102706564A CN102706564A CN2012102085749A CN201210208574A CN102706564A CN 102706564 A CN102706564 A CN 102706564A CN 2012102085749 A CN2012102085749 A CN 2012102085749A CN 201210208574 A CN201210208574 A CN 201210208574A CN 102706564 A CN102706564 A CN 102706564A
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Abstract
The invention discloses a motor test system for an electric vehicle, and solves the problems that a motor test system in the prior art can not meet neither constant-torque loading when an electric vehicle motor runs below the rated rotational speed nor constant-power loading when the electric vehicle motor runs above the rated rotational speed. The motor test system comprises a tested-motor controller connected with a tested motor and used for controlling the state of the tested motor simulating the operation of the electric vehicle, an AC power dynamometer connected with the output terminal of the shaft of the tested motor and used for providing a load for the tested motor and the controller so as to simulate the required power output during actual operation of the electric vehicle, a dynamometer controller connected with the dynamometer and used for controlling the dynamometer to provide a resisting force for both the tested motor and the tested-motor controller when the tested motor simulates the operation of the electric vehicle, and a rotational speed and torque sensor connected with the output shaft of the tested motor and used for measuring both the rotational speed and the torque of the tested motor. The motor test system can improve the accuracy in testing the electric vehicle motor.
Description
Technical field
The present invention relates to used for electric vehicle motor test field, in particular to a kind of motor in electric automobile pilot system and control method.
Background technology
The electric powered motor drive system requires speed-regulating range width, starting moment is big, stand-by power is high, power density is big, good reliability, have permanent torque and Heng Gongshuaiqu etc.Capacity aspect based on accumulator is considered, requires specific power, specific torque and the efficient of motor all high as much as possible.Simultaneously, reach optimum matching in order to make vehicle performance, also require the motor highway car must satisfy car load power performance, satisfy performance requirements such as max. speed, climbing, fully loaded acceleration.It is thus clear that, be the direct factor of decision electric automobile performance as the motor and the controller of the power resources of total system, therefore, be very important to the performance test of motor in electric automobile and controller.
Dynamometer machine commonly used at present mainly contains electric DC dynamometer, electric eddy current dynamometer and hydraulic dynamometer.
Electric DC dynamometer is combined by direct current generator, dynamometer and tech-generator.The stator of direct current generator is by bearing block support independently, and it can freely swing in a certain angular range.Have the dynamometry arm on the casing, it cooperates with dynamometer, can detect the torque that stator is received.Torque in the rotating shaft can be by measuring on the nail.With the direct current generator electric machinery seemingly, the direct current dynamometer good speed adjustment features, control is simple, and is single, but because commutator is not suitable for high-speed cruising, and powerful dynamometer machine relatively and other types, volume is bigger.Be not suitable for the power motor test.
Electric eddy current dynamometer is to utilize eddy current to produce retarding torque to come the device of measurement mechanical torque.It is made up of electromagnetic slip clutch, dynamometer and tech-generator.It can't satisfy motor in electric automobile permanent torque below rated speed point, the characteristic that permanent power loads more than the rated speed; Simultaneously, the water conservancy dynamometer machine can't satisfy this characteristic equally.In addition, these two kinds of dynamometer machines all can not satisfy the feed testing requirements of electric automobile and controller.Wherein, permanent torque/permanent power output is meant motor and no matter how rotating speed changes all can a certain fixed torque value exports.Permanent power output is meant motor and no matter how rotating speed changes all can a certain constant power value exports.The feed test is meant that the electricity that motor in electric automobile and controller need to send is charged in the automobile batteries, is the test of checking this function to carry out in actual condition.
Summary of the invention
The invention provides a kind of motor in electric automobile pilot system, be used to solve motor test of the prior art system and can't satisfy motor in electric automobile permanent torque below rated speed point, the problem that permanent power loads more than the rated speed.
According to an aspect of the present invention, a kind of motor in electric automobile pilot system is provided, has comprised: tested electric machine controller and is linked to each other the running status of motor when being used to control tested motor simulation electric automobile operation by measured motor; Electric A.C. dynamometer links to each other with tested motor shaft output terminal, is used to by measured motor and controller load is provided; The Dynamometer Control device links to each other with dynamometer machine, is used to control dynamometer machine when measured motor analog electrical electrical automobile moves, for by measured motor and tested electric machine controller load being provided; Torque and speed sensors and is linked to each other by the output shaft of measured motor, is used to detect tested rotating speed of motor and torque.
Wherein, above-mentioned torque and speed sensors be connected through the high speed diaphragm coupling by the output shaft of measured motor.
Wherein, above-mentioned torque and speed sensors is the torque and speed sensors that electric A.C. dynamometer carries.
Further, said system also comprises: the rectifier power source of band feeder equipment, be arranged between motor and the batteries of electric automobile, and be used for motor is carried out the feed check.
Further, said system also comprises: the energy consumption unit, and linked to each other by measured motor, and be used to absorb the electric energy that is sent when the on-position by measured motor and tested electric machine controller.
Wherein, above-mentionedly linked together through shaft coupling by measured motor and electric A.C. dynamometer.
Wherein, above-mentioned electric A.C. dynamometer controller is controlled electric A.C. dynamometer through the Direct Torque Control mode.
According to another aspect of the present invention, a kind of motor in electric automobile test control method is provided, has comprised: control by the operation of measured motor the state of motor when moving with the analog electrical electrical automobile; According to being controlled electric A.C. dynamometer for load to be provided by measured motor by the running status of measured motor; Detection is by velocity amplitude and the torque value of measured motor in each running status correspondence.
Wherein, according to by the running status of measured motor control electric A.C. dynamometer for to be provided load to comprise by measured motor: when being in traction working condition by measured motor, electric A.C. dynamometer carries out closed-loop control according to torque, for by measured motor the tractive resistance load being provided.
Wherein, according to being controlled electric A.C. dynamometer for to be provided load to comprise by measured motor by the running status of measured motor: when being in the electric braking operating mode by measured motor, the control electric A.C. dynamometer is for to be provided the brake resistance load by measured motor.
What the motor in electric automobile pilot system of present embodiment adopted is the alternating current asynchronous variable-frequency motor, and this motor all possesses permanent torque below the rated speed point electronic with generating operation mode, the characteristic that permanent power loads more than the rated speed.Therefore, motor in electric automobile pilot system of the present invention can be when electric automobile be in each operating mode, for by measured motor load being provided, needed power output during analog electrical electrical automobile actual motion.And then raising is to the accuracy of electric automobile motor test.
Description of drawings
Fig. 1 is the ingredient synoptic diagram of the motor in electric automobile pilot system of the embodiment of the invention 1;
Fig. 2 is the electric automobile travelling speed curve map of the embodiment of the invention 1;
Fig. 3 is the motor in electric automobile test system architecture block diagram of the embodiment of the invention 2; And
Fig. 4 is the motor in electric automobile test control method process flow diagram of the embodiment of the invention 3.
Embodiment
For make above-mentioned purpose of the present invention, feature and advantage can be more obviously understandable, below in conjunction with accompanying drawing and embodiment the embodiment of the invention done further detailed explanation.
Fig. 1 is the ingredient synoptic diagram of the motor in electric automobile pilot system of the embodiment of the invention 1.
As shown in Figure 1, this motor in electric automobile pilot system 10 comprises following ingredient:
By measured motor 15 and tested electric machine controller 11, and linked to each other by measured motor, the state of motor when being used to control tested motor simulation electric automobile operation is with the power situation of control electric automobile.
Electric A.C. dynamometer 12 links to each other with tested motor shaft output terminal, is used to by measured motor and controller load is provided, needed power output during with analog electrical electrical automobile actual motion;
This electric A.C. dynamometer can be simulated by the load of measured motor and tested electric machine controller, and then simulates the needed power output of electric automobile actual motion.
Torque and speed sensors 14 and is linked to each other by the output terminal of measured motor, is used to detect tested rotating speed of motor and torque.
Above-mentioned in the present embodiment can be linked together through shaft coupling by measured motor and electric A.C. dynamometer 12.Lean on shaft coupling can the power of being exported by measured motor be passed to electric A.C. dynamometer like this.
Above-mentioned electric A.C. dynamometer controller 13 can be controlled above-mentioned electric A.C. dynamometer 12 through the Direct Torque Control mode.This mode is applied in the dynamic test to the higher electric automobile of torque measurement accuracy requirement, compares with traditional control mode, and it can reach 0.3% to the control accuracy of torque, can improve control accuracy.
Because torque and rotating speed are by the direct embodiment of measured motor and tested electric machine controller (being power system of electric automobile) performance; Also can reflect simultaneously the matching degree and the rationality of power system of electric automobile, foundation is provided for electric automobile disposes rational power system.Therefore, to above-mentioned torque and speed sensors and very high by the requirement of the connection reliability of measured motor.Torque and speed sensors 14 in the present embodiment can be connected through the high speed diaphragm coupling by the output shaft of measured motor with above-mentioned; This connected mode can be born and run up and time operation that full load is long, and reduces the control accuracy of whole motor test system and the influence of measuring accuracy.In addition, this torque and speed sensors 14 torque and speed sensors that can also adopt electric A.C. dynamometer to carry.Because electric A.C. dynamometer and torque and speed sensors are as a whole, can improve the accuracy of motor test system further.
In said system 10; Constituted a closed loop main circuit circulation system by measured motor and electric A.C. dynamometer; Be in motor and generator state respectively by measured motor and ac dynamometer during traction working condition; Energy consumes each other, and is little to the electric energy consumption, only needs control electric energy and mechanical friction power consumption.The traction and the electric braking operating mode that are used to realize automobile by measured motor and electric machine controller; Ac dynamometer receives the dynamic resistance that runs in the control analog electrical electrical automobile driving process of electric A.C. dynamometer controller.
The motor in electric automobile pilot system of present embodiment mainly realizes traction working condition and electric braking operating mode, below these two kinds of operating modes is elaborated:
Under traction working condition, by the traction of measured motor and controller analog electrical electrical automobile, its output power is passed to the electric A.C. dynamometer that is in generating operation mode through variator, and ac dynamometer is according to the torque closed-loop control, the resistant load of analog electrical electrical automobile.Under the electric braking operating mode; Electric A.C. dynamometer continues the change in resistance of analog electrical electrical automobile in braking procedure; Then under the drive of the inertia rotation of flywheel, be in generating operation mode by measured motor and electric machine controller, simulation realizes the resistance consumption or the feedback of electric automobile regenerated energy.
State in realization in the process of two kinds of operating modes, realized the constant force square of motor, permanent rotating speed and natural characteristic successively by measured motor and controller thereof, and the traction acceleration of electric automobile, coasting and three processes of braking deceleration.Under the traction control and load control acting in conjunction of electric machine controller; The motor in electric automobile overall condition is made an experiment; Electric automobile travelling speed curve map that can be as shown in Figure 2 can draw electric automobile through the analysis to this figure and operate in the tested motor characteristic under the different operating modes.
The motor in electric automobile pilot system of present embodiment adopts electric A.C. dynamometer; When this dynamometer machine is in electronic and generating operation mode at electric automobile; Possesses permanent torque below the rated speed point; The characteristic that permanent power loads more than the rated speed, and adopt torque to control to guarantee permanent torque loading and rotating speed control, guaranteed the loading of permanent rotating speed.In addition, according to the characteristics of electric A.C. dynamometer, can realize that through modes such as control curve that voltage is correlated with and matches permanent power loads more than the rated speed.Therefore, the motor in electric automobile pilot system of present embodiment can be when electric automobile be in each operating mode, and for by measured motor load being provided, needed power output improves the accuracy to the motor in electric automobile test during analog electrical electrical automobile actual motion.
Embodiment 2
The motor in electric automobile pilot system of present embodiment and the difference of the motor in electric automobile pilot system in the foregoing description 1 are; The system of present embodiment also comprises rectifier power source and the energy consumption unit of being with feeder equipment; Owing to increased this two ingredients, the system of present embodiment can realize the feed test of motor in electric automobile.And present embodiment is to each ingredient that in embodiment 1, comprises, other ingredient that the motor in electric automobile pilot system also comprises is illustrated.
Fig. 3 is the motor in electric automobile test system architecture block diagram of the embodiment of the invention 2.
As shown in Figure 3, this pilot system comprises following ingredient:
Incoming power AR3 power supply input cabinet, configuration circuit protective breaker and disjunction contactor, this incoming power cabinet are used for the control of pilot system total output electric power incoming line and defencive functions such as overcurrent, overvoltage, ground connection, phase shortage are provided.The TM1 rectifier transformer is used for incoming power is converted into the input power supply of variable-frequency power sources needs.Simultaneously pilot system power supply and electrical network are isolated.Guarantee power plant not to be disturbed in the variable-frequency power sources operational process.AR4 D.C. regulated power supply cabinet is used for the power supply of motor in electric automobile controller, and its voltage can be regulated according to the reality test.AR5 measures the wiring cabinet, disposes 1 road direct current input, 3 tunnel and exchanges the output measurement, is used for measuring by examination controller input electrical quantity and quilt examination motor input electrical quantity.CDM1 is tried electric machine controller, and AR6 Dynamometer Control device is used for electric A.C. dynamometer C1 traction control and braking control, and control mode is a Direct Torque Control.The C1 electric A.C. dynamometer is as the load equipment that is tried motor.The T-n torque rotary speed sensor is used for being tried motor output torque and measures.M1 is by the examination electric motor of automobile.
Wherein, Electric A.C. dynamometer in the present embodiment can adopt ACG series electric A.C. dynamometer system; The electric A.C. dynamometer that this system is got up by a suspension; Torque rotary speed sensor, mounting seat reach and the power machine joint flange, but the ACS800 of four quadrant running series AC variable-frequency speed regulation system is formed.Wherein, the ACS AC variable-frequency speed regulation system through the control dynamometer machine rotating speed and moment of torsion come to be loaded to trying motor.This dynamometer machine can be realized two-way loading easily, when rotating speed is very low, enough load capabilities can be provided simultaneously; And its loading characteristic is that zero rotating speed to rated speed is that perseverance is turned round characteristic, and rated speed to maximum speed is a constant output characteristic, so this dynamometer machine is fit to be applied in the present embodiment system.
For whether the motor of checking electric automobile can be charged to the electric energy that sends in the automobile batteries when moving.The electric automobile motor test system of present embodiment comprises: the rectifier power source of band feeder equipment; This power supply is arranged between motor and the batteries of electric automobile; Be used for motor is carried out the feed check, for example, when the electric automobile descending; Can make power system transfer generating state to and the electric energy that sends is charged to the accumulator of electric car again, thereby save the energy from motoring condition.Adopt this power supply, system can keep away owing to use under the situation of exempting from the long-term discharge of accumulator, and voltage reduces the influence that system brought, and the existence of feeder equipment simultaneously can realize the function of charge in batteries, and can be according to measuring the size of knowing generated energy.Because rectifier power source is easy for installation, when having avoided the use accumulator, therefore the overlong time that discharges and recharges improves the work efficiency of whole system greatly.
Based on the rectifier power source of above-mentioned band feeder equipment, this system of present embodiment can also comprise the energy consumption unit, this energy consumption unit with linked to each other by measured motor, be used to absorb the electric energy that is sent when the on-position by measured motor and tested electric machine controller.The energy consumption unit further has been avoided the problem of using accumulator under fixing voltage, to make an experiment according to by the demand of the operating condition of examination motor voltage being adjusted simultaneously.
Embodiment 3
Fig. 4 is the motor in electric automobile test control method process flow diagram of the embodiment of the invention 3.
As shown in Figure 4, this method may further comprise the steps:
Step 401: control by the operation of measured motor the state of motor when moving with the analog electrical electrical automobile;
Step 402: according to being controlled electric A.C. dynamometer for resistance to be provided by measured motor by the running status of measured motor;
Step 403: detect by measured motor in the corresponding velocity amplitude of each running status and torque value, response time value.
The motor in electric automobile test control method of present embodiment is mainly used in each equipment of control motor in electric automobile pilot system to realize electric automobile traction working condition and electric braking operating mode; Under traction working condition; Drawn by measured motor and controller analog electrical electrical automobile; Its output power is passed to the electric A.C. dynamometer that is in generating operation mode through variator, and ac dynamometer is according to the torque closed-loop control, the resistant load of analog electrical electrical automobile.This moment, dynamometer machine was the state of dragging, and adopted closed loop rotating speed control model, and control accuracy can reach 0.1%, and being tried motor is generating state, through being generated electricity by the torque control model of examination electric machine controller.Under the electric braking operating mode; Electric A.C. dynamometer continues the change in resistance of analog electrical electrical automobile in braking procedure; Then under the drive of the inertia rotation of flywheel, be in generating operation mode by measured motor and electric machine controller, simulation realizes the resistance consumption or the feedback of electric automobile regenerated energy.The dc bus end of tested electric machine controller adds the adjustable chopper of voltage; Like this when the time by examination motor and controller generating; DC bus-bar voltage rises, and when having reached the trigger voltage that chopper is provided with, will make the chopper conducting; This moment, energy consumption resistance linked to each other with dc bus, consumed the electric energy that sends.
Present embodiment also provides a kind of motor in electric automobile experiment control system, and this system can adopt above-mentioned motor in electric automobile test control method to come the motor in electric automobile pilot system is controlled, and this system comprises power analyzer and industrial computer.This system can be unified into automatic control system with all parts based on upper computer software, and this control system can be based on the LABVIEW platform development, and through communications protocol such as CAN with rectifier power source, electric vehicle controller, the networking of Dynamometer Control device.Wherein, Power analyzer can be with the input electric weight that is tried electric machine controller; Be accumulator of electric car output electric weight, the output of tested electric machine controller, the electric weight of promptly being imported, tried the motor output torque rotating speed by the examination motor; Be the real-time synchronous acquisition of parameter such as performance reaction of power system of electric automobile, and, in the precision that effectively guarantees test data, also guaranteed the authenticity of data through gpib bus system of connections software.And; Can detect the running status of motor in electric automobile accurately and rapidly through computer data acquisition system; And then analyze electric automobile and operate in the motor in electric automobile characteristic under the different operating modes, improved the efficient and the accuracy of electric automobile motor test.
Need to prove; In this article; Relational terms such as first and second grades only is used for an entity or operation are made a distinction with another entity or operation, and not necessarily requires or hint relation or the order that has any this reality between these entities or the operation.And; Term " comprises ", " comprising " or its any other variant are intended to contain comprising of nonexcludability; Thereby make and comprise that process, method, article or the equipment of a series of key elements not only comprise those key elements; But also comprise other key elements of clearly not listing, or also be included as this process, method, article or equipment intrinsic key element.Under the situation that do not having much more more restrictions, the key element that limits by statement " comprising ... ", and be not precluded within process, method, article or the equipment that comprises said key element and also have other identical element.
The above is merely preferred embodiment of the present invention, is not to be used to limit protection scope of the present invention.All any modifications of within spirit of the present invention and principle, being done, be equal to replacement, improvement etc., all be included in protection scope of the present invention.
Claims (10)
1. a motor in electric automobile pilot system is characterized in that, comprising:
Tested electric machine controller and is linked to each other by measured motor, the running status of motor when being used to control said tested motor simulation electric automobile operation;
Electric A.C. dynamometer links to each other with said tested motor shaft output terminal, is used to by measured motor and said controller load is provided;
The Dynamometer Control device links to each other with said dynamometer machine, is used to control said dynamometer machine when said measured motor analog electrical electrical automobile moves, for by measured motor and said tested electric machine controller load being provided;
Torque and speed sensors links to each other with said output shaft by measured motor, is used to detect said tested rotating speed of motor and torque.
2. system according to claim 1 is characterized in that, said torque and speed sensors is connected through the high speed diaphragm coupling by the output shaft of measured motor with said.
3. system according to claim 2 is characterized in that, said torque and speed sensors is the torque and speed sensors that said electric A.C. dynamometer carries.
4. system according to claim 1 is characterized in that, said system also comprises:
The rectifier power source of band feeder equipment is arranged between said motor and the batteries of electric automobile, is used for said motor is carried out the feed check.
5. system according to claim 4 is characterized in that, said system also comprises:
The energy consumption unit is linked to each other by measured motor with said, is used to absorb the electric energy that is sent when the on-position by measured motor and said tested electric machine controller.
6. system according to claim 1 is characterized in that, is saidly linked together through shaft coupling by measured motor and said electric A.C. dynamometer.
7. system according to claim 1 is characterized in that, said electric A.C. dynamometer controller is controlled said electric A.C. dynamometer through the Direct Torque Control mode.
8. a motor in electric automobile test control method is characterized in that, comprising:
Control is by the operation of measured motor, the state of motor when moving with the analog electrical electrical automobile;
According to said be saidly load to be provided by the running status of measured motor control electric A.C. dynamometer by measured motor;
Detect said by the velocity amplitude and the torque value of measured motor in each running status correspondence.
9. method according to claim 8 is characterized in that, according to said be saidly to be provided load to comprise by the running status of measured motor control electric A.C. dynamometer by measured motor:
When being in traction working condition by measured motor, said electric A.C. dynamometer carries out closed-loop control according to torque when said, by measured motor the tractive resistance load is provided for said.
10. method according to claim 8 is characterized in that, according to said be saidly to be provided load to comprise by the running status of measured motor control electric A.C. dynamometer by measured motor:
When said when being in the electric braking operating mode by measured motor, controlling said electric A.C. dynamometer and being is saidly provided the brake resistance load by measured motor.
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