CN101470171B - Generator endurance test bed - Google Patents
Generator endurance test bed Download PDFInfo
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- CN101470171B CN101470171B CN2007100946210A CN200710094621A CN101470171B CN 101470171 B CN101470171 B CN 101470171B CN 2007100946210 A CN2007100946210 A CN 2007100946210A CN 200710094621 A CN200710094621 A CN 200710094621A CN 101470171 B CN101470171 B CN 101470171B
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Abstract
The invention discloses a test bench for the durability of generators, which comprises a variable-frequency motor, a worktable and a fixture, wherein the fixture fixes a generator on the worktable; the generator is connected with an alternative current load and is operated by the variable-frequency motor via a belt. The test bench further comprises a programmable controller and a frequency converter, wherein the programmable controller, the frequency converter and the variable-frequency motor are connected via cables in turn; the frequency converter outputs the drive voltage needed by the variable-frequency motor, according to the frequency, start time and stop time set by the programmable controller. The test bench for the durability of generators has compact structure, low cost, high precision, automatic controlled test process and the application for middle and small laboratories.
Description
Technical field
The present invention relates to a kind of testing equipment of AC generator for vehicle, is a kind of generator endurance test bed specifically.
Background technology
Generator is the vitals of automobile, and its function is when normal working of engine, to all consumers (except the starter) power supply, charges a battery simultaneously.Electric generators for automobile can be divided into Dyn. and alternator, because the performance of alternator is better than Dyn. in many aspects, Dyn. is eliminated.At present, automobile adopts threephase alternator, and inside has diode rectifier circuit, is direct current with AC rectification, so what AC generator for vehicle was exported is direct current.Alternator must be equipped with voltage regulator, and voltage regulator is controlled the output voltage of generator, makes it keep substantially constant, to satisfy the demand of vehicular electrical appliance.
Generator can cause the automotive electrical system cisco unity malfunction if break down, and causes the damage of automobile miscellaneous part, even causes security incident.After generator broke down, maintenance manufacturer often gave integral replacement.Usually need several thousand yuan of numbers even high price more and replace a generator,, not only cause tremendous loss, also with the reputation of damage car manufacturer to the consumer if generator is of low quality.For guaranteeing the quality requirements of generator, automobile vendor just must pick out qualified generator supplier, removes underproof generator supplier.For this reason, just must carry out endurancing to generator, can operate as normal in official hour by the sampling observation generator, determine the quality of this batch products.
According to automobile industry standard " motorcar alternator technical conditions " (QC/T 729-2005) 4.24 regulations, alternator should be able to bear the endurancing of 2000h, or 120, the 000km actual road test, after the test, its hot performance value allows lower by 5% than the hot performance value before its endurancing, and regulation voltage level should meet following standard: 12V series and be 14.5V ± 0.25V; 24V series is 28.5V ± 0.3V.Stator, rotor insulation resistance should be greater than 1M Ω.
Simultaneously, stipulate according to automobile industry standard " motorcar alternator technical conditions " (QC/T 729-2005) 5.19.1, the alternator endurancing should be undertaken by the cyclic test of the listed condition of table 1, environment temperature is a normal temperature, test period is 2,000h, each long run test time is no less than 4h, does not allow to maintain and change brush in the process of the test.
Table 1 endurancing cycle period
At present, the conventional method to engine edurance test is: drag the tested motor of issuing after examination and approval with motor and turn round according to given rotating speed, the electric energy that generator produced is by the incoming transport load consumption.By this kind mode, but the running environment of generator in the simulated automotive operational process, and whether the check generator reaches at the appointed time under the environmental baseline and breaks down.Wherein, crucial technology adopts PC control usually in the control of motor speed.Adopt PC control, need to install a kind of motion control card, it and PC constitute management and other management work that master slave control structure: PC is responsible for man-machine interface, and motion control card is specifically designed to the motion of control servomotor.The rotating speed of this kind equipment may command motor, but its controlling schemes complexity, environmental suitability is poor, and volume is big, price is expensive, is not suitable for medium and small laboratory and uses.
Summary of the invention
At above-mentioned defective, the technical matters that the present invention solves is, provides a kind of automaticity height, adaptability strong, lower-cost generator endurance test bed.
For solving above technical matters, provided by the invention generator endurance test bed, comprise variable-frequency motor, worktable, anchor clamps, described anchor clamps are fixed on generator on the described worktable, described generator is connected to AC load, drags its running by variable-frequency motor by belt: also comprise Programmable Logic Controller, frequency converter; Described Programmable Logic Controller, frequency converter, variable-frequency motor connect successively by cable, frequency and starting and stopping time that described frequency converter is set according to described Programmable Logic Controller, export the required driving voltage of described variable-frequency motor.
Preferably, also comprise A.C. contactor; The main contact of described A.C. contactor connects the AC load branch road of generator, and auxilliary contact connects described Programmable Logic Controller; The switching of the auxilliary contact of described A.C. contactor is controlled by described Programmable Logic Controller.
Preferably, described AC load is the bulb group of a plurality of parallel connections.
Preferably, described AC load is a variable resistor.
Of the present invention generator endurance test bed, introduce Programmable Logic Controller and variable-frequency control technique.Control technology and variable-frequency control technique are combined, and by the frequency and the starting and stopping time of Programmable Logic Controller setting frequency converter, the control of conversion device outputs to variable-frequency motor driving voltage frequency, with regard to the rotating speed of may command variable-frequency motor.Under official hour and condition, with variable-frequency motor drawing generator rotation speed operation according to the rules, adjust AC load simultaneously to change the working current of generator, simulate the running environment of generator, can effectively judge the performance of generator.
Programmable Logic Controller has that volume is little, precision is high, assembling is flexible, antijamming capability is strong, reliability is high, is suitable for characteristics such as rugged surroundings use; And variable-frequency control technique has advantages such as speed-regulating range width, speed governing is level and smooth, adjusting speed accuracy is high, control is flexible.Both advantages are combined, can accurately control generator operation speed and working time, realize the automatic control of engine edurance test process, thereby simplify procedures, reduce operating cost, avoid the influence of human error test result.
In the preferred version of the present invention, add A.C. contactor, its main contact connects the AC load branch road, and auxilliary contact connects Programmable Logic Controller.The auxilliary contact of Controlled by Programmable Controller A.C. contactor gets the dead electricity logic, open and close the AC load branch road by the A.C. contactor main contact, realize the size of AC load and the automatic control of joining day process, the generator working current is stabilized in the test condition setting range, the test condition of strict guarantee engine edurance test, the confidence level of raising test findings.
Of the present invention generator endurance test bed, compact conformation, with low cost, precision is higher, test process can be controlled automatically, be particularly suitable for medium and small testing laboratory and use.
Description of drawings
Below in conjunction with the drawings and the specific embodiments the present invention is further described:
Fig. 1 is the generator endurance test bed structural representation of the present invention;
Fig. 2 is a generator speed control flow chart of the present invention;
Fig. 3 is AC load branch road figure of the present invention;
Fig. 4 is an AC load control flow chart of the present invention.
Embodiment
Shown in Figure 1 generator endurance test bed, comprising: Programmable Logic Controller 1 (ProgrammableLogical Controller, PLC), frequency converter 2, variable-frequency motor 3, cable 4, belt 5, worktable 6, anchor clamps 7, AC load (figure does not show).Be connected to AC load on the generator 20, and be fixed on the worktable 6 by anchor clamps 7.Programmable Logic Controller 1, frequency converter 2, variable-frequency motor 3 connect successively by cable 4, and variable-frequency motor 3 is by 20 runnings of belt 5 drawing generators.
As shown in Figure 1, Programmable Logic Controller 1, frequency converter 2 place control rack 9, and this control rack 9 is provided with control panel 10.By the button on the operation control panel 10, can set the frequency and relevant test parameterss such as starting and stopping time of frequency converter 2.The frequency of frequency converter 2 and starting and stopping time are consistent with variable-frequency motor 3 rotating speeds and starting and stopping time, and according to (QC/T729-2005) 5.19.1 regulation setting of automobile industry standard " motorcar alternator technical conditions ", relevant data sees Table 1.
Being convenient and discussing, is that example describes with the supporting generator of the 479Q of HuaPu that produces with Shanghai Huapu Engine Co., Ltd below.This rated current of generator is 75A, and corresponding nmax is 12000 rev/mins.Therefore, according to the described standard of table 1, and in conjunction with the actual conditions of generator, the concrete parameter during this engine edurance test can be carried out according to data shown in the table 2.
Table 2 endurancing setup parameter
As shown in Figure 2, the control procedure to generator 20 is:
S1) PLC initialization;
S2) regulating AC load, to make working current be 15A, carries out the period 1 circulation;
S21) set sense of rotation for being rotated in the forward, rotating speed is 3000 rev/mins, moves 80 minutes;
S22) set sense of rotation for being rotated in the forward, rotating speed is 6000 rev/mins, moves 80 minutes;
S23) set sense of rotation for being rotated in the forward, rotating speed is 12000 rev/mins, moves 15 minutes;
S24) stop 5 minutes;
S3) to make working current be 30A in regulating load, carries out circulation second round;
S31) set sense of rotation for being rotated in the forward, rotating speed is 3000 rev/mins, moves 80 minutes;
S32) set sense of rotation for being rotated in the forward, rotating speed is 6000 rev/mins, moves 80 minutes;
S33) set sense of rotation for being rotated in the forward, rotating speed is 12000 rev/mins, moves 15 minutes;
S34) stop 5 minutes;
S4) to make working current be 67.5A in regulating load, carries out the period 3 circulation;
S41) set sense of rotation for being rotated in the forward, rotating speed is 3000 rev/mins, moves 80 minutes;
S42) set sense of rotation for being rotated in the forward, rotating speed is 6000 rev/mins, moves 80 minutes;
S43) set sense of rotation for being rotated in the forward, rotating speed is 12000 rev/mins, moves 15 minutes;
S5) stop.
In the above-mentioned control flow, Programmable Logic Controller 1 is set the frequency and the starting and stopping time of the output voltage of frequency converter 2, the frequency of the driving voltage of control of conversion motor 3 make variable-frequency motor 3 according to the given rotating speed running, and drawing generator 20 turns round thus according to given rotating speed.In the process of the test, generator 20 runs without interruption at the appointed time, adds AC load in good time, and the electric energy that makes generator 20 generations is by the consumption of AC load device, and assurance generator 20 is worked in setting range of current.After each round-robin off-test, the parameters of generator 20 should be able to satisfy the regulation of " motorcar alternator technical conditions " (QC/T 729-2005) 4.24; Otherwise, should judge that product is defective.
The present invention introduces PLC control technology and variable-frequency control technique: PLC and has that volume is little, precision is high, assembling is flexible, antijamming capability is strong, reliability is high, is suitable for characteristics such as rugged surroundings use; And variable-frequency control technique has advantages such as speed-regulating range width, speed governing is level and smooth, adjusting speed accuracy is high, control is flexible.Both advantages are combined,, can control accurately, realize the automatic control of process of the test the rotating speed and the working time of generator 20 by the frequency of Programmable Logic Controller 1 setting variable-frequency motor 3 driving voltages.In this process of the test, need not human intervention, the error of having avoided human factor to cause.
Be warranty test result's confidence level, in each cyclic test, generator 20 be operated within the predetermined electric current scope:
As shown in Figure 3, the AC load branch road has added A.C. contactor 11.The main contact of A.C. contactor 11 connects the AC load branch road of generator 20, and wherein: a contact connects AC load, and another contact connects the output terminal of generator 20.The auxilliary contact of A.C. contactor 11 links to each other with Programmable Logic Controller 1 output terminal, and Programmable Logic Controller 1 is according to the predetermined logic that adds AC load, and the switching of output control A.C. contactor 11 auxilliary contacts is instructed; The steering order of A.C. contactor 11 response Programmable Logic Controllers 1, its auxilliary junction closure or disconnection, according to coil, the dead electricity situation, the also correspondingly closed or disconnection of the main contact of A.C. contactor 11, thereby open and close AC load branch road, add AC load in good time, guarantee that generator 20 is operated under the normal electric current.Thus, the size of AC load and joining day are realized control automatically, and the working current of generator 20 is stabilized in the setting range, the test condition of strict guarantee engine edurance test, the confidence level of raising test findings.
Above-mentioned AC load, preferably, by variable resistor, or many groups bulb in parallel forms, its benefit is, compact conformation, with low cost, be easy to safeguard.
AC load control flow chart of the present invention shown in Figure 4, the PLC that produces according to Japanese Nissan Electric Co., Ltd describes, and order set and the relay configuration method of relevant this PLC can correspondingly be consulted relevant handbook, do not repeat them here.Control procedure shown in Figure 4 its role is to: rotating speed and the working time of setting variable-frequency motor 3; Set the size and the joining day of AC load.
T1) beginning
T2) set sense of rotation for being rotated in the forward, load is 15A, carries out the period 1 circulation;
T21) setting rotating speed is 3000 rev/mins, and first A.C. contactor is connected in the P045 conducting, and first group of bulb connected, and moves 80 minutes;
T22) setting the rotation rotating speed is 6000 rev/mins, and second A.C. contactor connected in the P044 conducting, and second group of bulb connected, and moves 80 minutes;
T23) setting the rotation rotating speed is 12000 rev/mins, and the 3rd A.C. contactor connected in the P040 conducting, and the 3rd group of bulb connected, and moves 15 minutes;
T24) stop 5 minutes;
T3) set sense of rotation for being rotated in the forward, load is 30A, carries out circulation second round;
T31) setting rotating speed is 3000 rev/mins, and the 4th A.C. contactor connected in the P046 conducting, and the 4th group of bulb connected, and moves 80 minutes;
T32) setting the rotation rotating speed is 6000 rev/mins, and the 5th A.C. contactor connected in the P054 conducting, and the 5th group of bulb connected, and moves 80 minutes;
T33) setting the rotation rotating speed is 12000 rev/mins, and the 6th A.C. contactor connected in the P055 conducting, and the 6th group of bulb connected, and moves 15 minutes;
T34) stop 5 minutes;
T4) set sense of rotation for being rotated in the forward, load is 67.5A, carries out the period 3 circulation;
T41) setting rotating speed is 3000 rev/mins, and the 7th A.C. contactor connected in the P045 conducting, and the 7th group of bulb connected, and moves 80 minutes;
T42) setting the rotation rotating speed is 6000 rev/mins, and the 8th A.C. contactor connected in the P054 conducting, and the 8th group of bulb connected, and moves 80 minutes;
T43) setting the rotation rotating speed is 12000 rev/mins, and the 9th A.C. contactor connected in the P055 conducting, and the 9th group of bulb connected, and moves 15 minutes;
T5) finish test.
Above-mentioned control procedure adopts ladder diagram establishment control program usually, and its advantage is; Program structure is similar to the method that is electrically connected of relay, and control procedure is very directly perceived, also is easy to establishment.In some high-end PLC product, the control program of PLC also can also can adopt assembly language, C language or the establishment of other higher level lanquages.About the knowledge of this respect, belong to the common practise in present technique field, do not belong to discussion scope of the present invention, do not repeat them here.
The present invention is generator endurance test bed, adopts the rotating speed of 1 pair of generator 20 of Programmable Logic Controller to control, and its control accuracy is 1 grade; Programmable Logic Controller 1 is also controlled the adition process of AC load, AC load can be added on the generator 20 in good time, and generator 20 is operated within the predetermined electric current scope, and the warranty test result has higher confidence level.In addition, generator endurance test bed volume of the present invention is small and exquisite, compact conformation, cheap, easy to maintenance, and intelligent degree is higher, can adapt to rugged surroundings, is particularly suitable for medium and small laboratory and uses.
The above only is a preferred implementation of the present invention; should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle of the invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (4)
- One kind generator endurance test bed, comprise variable-frequency motor, worktable, anchor clamps, described anchor clamps are fixed on generator on the described worktable, described generator is connected to AC load, drag its running by variable-frequency motor by belt, it is characterized in that: also comprise Programmable Logic Controller, frequency converter; Described Programmable Logic Controller, frequency converter, variable-frequency motor connect successively by cable, frequency and starting and stopping time that described frequency converter is set according to described Programmable Logic Controller, export the required driving voltage of described variable-frequency motor.
- 2. according to claim 1 generator endurance test bed, it is characterized in that: also comprise A.C. contactor; The main contact of described A.C. contactor connects the AC load branch road of generator, and auxilliary contact connects described Programmable Logic Controller; The switching of the auxilliary contact of described A.C. contactor is controlled by described Programmable Logic Controller.
- 3. according to claim 1 and 2 generator endurance test bed, it is characterized in that: described AC load is a plurality of bulb groups.
- 4. according to claim 1 and 2 generator endurance test bed, it is characterized in that: described AC load is a variable resistor.
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| CN2007100946210A CN101470171B (en) | 2007-12-25 | 2007-12-25 | Generator endurance test bed |
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| CN2007100946210A CN101470171B (en) | 2007-12-25 | 2007-12-25 | Generator endurance test bed |
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| CN101470171A CN101470171A (en) | 2009-07-01 |
| CN101470171B true CN101470171B (en) | 2011-06-22 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102353902B (en) * | 2011-10-13 | 2014-09-10 | 陕西航空电气有限责任公司 | Equivalent test device and method for motor |
| CN105092905B (en) * | 2015-09-01 | 2018-08-10 | 安徽江淮汽车集团股份有限公司 | A kind of fixing device of automobile current generator |
| CN106249145A (en) * | 2016-08-25 | 2016-12-21 | 江西清华泰豪三波电机有限公司 | A kind of device that can dynamically change power takeoff generation unit device working speed |
| CN107144786B (en) * | 2017-04-21 | 2019-11-01 | 广东机电职业技术学院 | Start-stop electrical machinery life test macro and method for hybrid vehicle |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2418490Y (en) * | 2000-03-15 | 2001-02-07 | 武汉铁路分局武昌车辆段 | Device for automatically detecting preformance of generator |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2418490Y (en) * | 2000-03-15 | 2001-02-07 | 武汉铁路分局武昌车辆段 | Device for automatically detecting preformance of generator |
Non-Patent Citations (3)
| Title |
|---|
| 周洪楷 等.汽车交流发电机高速冲击耐久性试验系统的结构设计.《汽车电器》.2001,55-57. |
| 周洪楷等.汽车交流发电机高速冲击耐久性试验系统的结构设计.《汽车电器》.2001,55-57. * |
| 李章钱.一种新型汽车交流发电机耐久性试验台.《汽车电器》.1987,6-10,25. * |
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