CN107797056A - Braking resistor loop contactor adhesion detecting system and method - Google Patents
Braking resistor loop contactor adhesion detecting system and method Download PDFInfo
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- CN107797056A CN107797056A CN201711043520.0A CN201711043520A CN107797056A CN 107797056 A CN107797056 A CN 107797056A CN 201711043520 A CN201711043520 A CN 201711043520A CN 107797056 A CN107797056 A CN 107797056A
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- braking resistor
- main contactor
- contactor
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/327—Testing of circuit interrupters, switches or circuit-breakers
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- General Physics & Mathematics (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
Abstract
The invention provides a kind of braking resistor loop contactor adhesion detecting system and method, the detecting system includes braking resistor control unit, sampling unit and lower electric control unit, wherein：The braking resistor control unit, for after lower electricity instruction and first preset time that is delayed is received, active discharge to be carried out to the circuit of the main contactor rear end by the semiconductor switch pipe；The sampling unit, for after lower electricity instruction and second preset time that is delayed is received, sampling the rear terminal voltage of the main contactor；The lower electric control unit, when the rear terminal voltage of the main contactor for being obtained in sampling is higher than setting voltage, the braking resistor control unit is entered standby mode and upload fault message.The present invention need not extend out the branch current detection circuit and sample circuit of complexity, you can quickly be positioned when there is adhesion fault, and because detection time is short, whole detection process does not interfere with normal lower electricity.
Description
Technical field
The present invention relates to Motor Control Field, is detected more specifically to a kind of braking resistor loop contactor adhesion
System and method.
Background technology
Braking resistor is mainly used in the mechanical system that Frequency Converter Control motor quickly stops, and helps motor by it because fast
Regenerative electric energy caused by speed parking is converted into heat energy.For example, in electric automobile, will be electronic by braking resistor controller
The unnecessary electric energy of feedback is released in braking resistor during braking automobile.However, once sent out in above-mentioned braking resistor loop
Raw contactor adhesion, it will cause contactor cut-off signal can not significant response, cell during discharge, cause electrokinetic cell to damage
It is bad, or even bigger danger occurs.Therefore, it is necessary to whether glued using a kind of effective method detection brake unit contactor
Even.
Existing contactor adhesion detection technique mainly has following several：
(1) sampling pins are set in need to be detected 2 points of contactor, by absolute pressure difference before and after judgement whether
Contactor adhesion situation is judged in certain threshold range.This detection method advantage is that principle is simple；Have a disadvantage in that：
The erroneous judgement of adhesion detection is easily caused, and the adhesion for not being suitable for complicated circuit construction judges.
(2) afterflow measure loop and voltage sample loop are increased in braking resistor controller main circuit terminal, by controlling branch
The break-make of contactor and voltage sample value judge the adhesion situation of main contactor on road.This detection method advantage is circuit
It is of a tightly knit structure, and an other branch road can ensure electrokinetic cell normal work when there is contactor adhesion fault；Its defect exists
In：The complexity in battery discharge loop is added, it is necessary to which sampling with high precision equipment, testing cost are high.
The content of the invention
The technical problem to be solved in the present invention is, is detected easily by mistake for above-mentioned braking resistor loop contactor adhesion
Sentence, circuit complexity the problem of, there is provided a kind of new braking resistor loop contactor adhesion detecting system and method.
The technical scheme that the present invention solves above-mentioned technical problem is to provide a kind of braking resistor loop contactor adhesion detection
System, the braking resistor loop include electrokinetic cell, main contactor, braking resistor, buffering electric capacity and semiconductor switch pipe,
And the braking resistor, buffering electric capacity and semiconductor switch pipe are connected to the rear end of the main contactor, the detecting system
Including braking resistor control unit, sampling unit and lower electric control unit, wherein：
The braking resistor control unit, for after lower electricity instruction and first preset time that is delayed is received, passing through institute
State semiconductor switch pipe and active discharge is carried out to the circuit of the main contactor rear end；
The sampling unit, for after lower electricity instruction and second preset time that is delayed is received, sampling the main contact
The rear terminal voltage of device；
The lower electric control unit, the rear terminal voltage of the main contactor for being obtained in sampling are higher than setting voltage
When, the braking resistor control unit is entered standby mode and upload fault message.
In contactor adhesion detecting system in braking resistor loop of the present invention, first preset time is described
The physics delay time that main contactor disconnects, after second preset time is first preset time and the main contactor
The discharge lag time sum of terminal circuit.
In contactor adhesion detecting system in braking resistor loop of the present invention, the discharge lag time is：
In the case that the main contactor does not stick together, the rear terminal voltage that the main contactor is disconnected to from the main contactor declines
To the time of preset value.
In contactor adhesion detecting system in braking resistor loop of the present invention, the lower electric control unit is sampling
When the rear terminal voltage of the main contactor obtained is less than or equal to setting voltage, the confession of the braking resistor control unit is disconnected
Electricity.
In contactor adhesion detecting system in braking resistor loop of the present invention, the detecting system includes main contact
Device control unit, for controlling the main contactor to disconnect after lower electricity instruction is received.
The present invention also provides a kind of braking resistor loop contactor adhesion detection method, and the braking resistor loop includes dynamic
Power battery, main contactor, braking resistor, buffering electric capacity and semiconductor switch pipe, and the braking resistor, buffering electric capacity and
Semiconductor switch pipe is connected to the rear end of the main contactor, and the detection method comprises the following steps：
After lower electricity instruction and first preset time that is delayed is received, by semiconductor switch pipe to main contactor rear end electricity
Road carries out active discharge；
After lower electricity instruction and second preset time that is delayed is received, the rear terminal voltage of the main contactor is sampled；
When the rear terminal voltage for the main contactor that sampling obtains is higher than setting voltage, enter braking resistor control unit
Enter standby mode and upload fault message.
In contactor adhesion detection method in braking resistor loop of the present invention, first preset time is described
The physics delay time that main contactor disconnects, after second preset time is first preset time and the main contactor
The discharge lag time sum of terminal circuit.
In contactor adhesion detection method in braking resistor loop of the present invention, the discharge lag time is：
In the case that the main contactor does not stick together, the rear terminal voltage that the main contactor is disconnected to from the main contactor declines
To the time of preset value.
In contactor adhesion detection method in braking resistor loop of the present invention, the detection method also includes：
When sampling the rear terminal voltage of the main contactor obtained less than or equal to setting voltage, the braking resistor control unit is disconnected
Power supply.
In contactor adhesion detection method in braking resistor loop of the present invention, the detection method includes：Connecing
The main contactor is controlled to disconnect after receiving lower electricity instruction.
Electricity is detected in the braking resistor loop contactor adhesion detecting system and method for the present invention, the tributary without extending out complexity
Road and sample circuit, you can quickly positioned when there is adhesion fault, and because detection time is short, whole detection process
Normal lower electricity is not interfered with.
Brief description of the drawings
Fig. 1 is the schematic diagram of contactor adhesion detecting system embodiment in braking resistor loop of the present invention；
Fig. 2 is the main contactor rear end voltage change curve figure when discharging main contactor back-end circuit；
Fig. 3 is the schematic flow sheet of contactor adhesion detection method embodiment in braking resistor loop of the present invention.
Embodiment
In order to make the purpose , technical scheme and advantage of the present invention be clearer, it is right below in conjunction with drawings and Examples
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.
As shown in figure 1, be the schematic diagram of contactor adhesion detecting system embodiment in braking resistor loop of the present invention, the braking
Resistance loop contactor adhesion detecting system is particularly applicable to contactor adhesion detection in electric vehicle brake unit etc..Its
In, braking resistor loop includes electrokinetic cell, main contactor KM1, braking resistor R1, buffering electric capacity C1 and semiconductor switch
Pipe, and above-mentioned electrokinetic cell, main contactor KM1, braking resistor R1 and semiconductor switch pipe are concatenated into loop, buffering electric capacity C1
Then it is connected in parallel with the braking resistor R1 and semiconductor switch pipe concatenated.In above-mentioned braking resistor loop, braking resistor R1, buffering
Electric capacity C1 and semiconductor switch pipe are connected to main contactor KM1 rear end, and in order to improve security, can also be in above-mentioned braking
Increase fuse in resistance loop.Above-mentioned semiconductor switch pipe body can use IGBT (Insulated Gate Bipolar
Transistor, insulated gate bipolar transistor).Certainly in actual applications, semiconductor switch pipe can also use triode, gold
Belong to oxide semiconductor field effect transistor (i.e. metal-oxide-semiconductor) etc..
In one embodiment of the invention, braking resistor loop contactor adhesion detecting system includes lower electric control unit
11st, braking resistor control unit 12 and sampling unit 13, wherein braking resistor control unit 12 and sampling unit 13 respectively with
After lower electric control unit 11 connects, and the input of sampling unit 13 is connected to the main contactor KM1 in braking resistor loop
To hold (sampled point A as depicted), the output end of braking resistor control unit 12 is connected to the control terminal of semiconductor switch pipe, with
The conducting and disconnection of semiconductor switch pipe are controlled, so that braking resistor loop is turned on or off, realizes the electric energy of electrokinetic cell
It is released to braking resistor R1.Specifically, above-mentioned braking resistor control unit 12 is by semiconductor switch pipe output pulse width
Modulated signal, realize the ON time control of semiconductor switch pipe.
Above-mentioned braking resistor loop contactor adhesion detecting system may also include main contactor control unit, the main contact
Device control unit controls main contactor KM1 to disconnect after lower electricity instruction is received.
In the present embodiment, braking resistor control unit 12 receive it is lower electricity instruction and first preset time that is delayed after,
Resistance in electric capacity C1, braking resistor R1 and circuit (is buffered to the circuit of main contactor KM1 rear ends by semiconductor switch pipe
And electric capacity) carry out active discharge, i.e., export predetermined pulse width modulated signal, quick release to the control terminal of semiconductor switch pipe
The residual voltage of capacitive load is hindered in the circuit of main contactor KM1 rear ends.When wherein receiving lower electricity instruction and default delay first
Between can be performed by lower electric control unit 11, lower electric control unit 11 receive it is lower electricity instruction and first preset time that is delayed after,
Signal is sent to braking resistor control unit 12, braking resistor control unit 12 is carried out voltage release operation.
It is to be discharged to enter after the stage of stable development (i.e. after lower electricity instruction and second preset time that is delayed is received), sampling unit 13
Terminal voltage (i.e. A points voltage in Fig. 1) after collection main contactor KM1.Wherein receive lower electricity instruction and the second preset time of delay
It can be performed by lower electric control unit 11, after lower electric control unit 11 receives lower electricity instruction and second preset time that is delayed, to
Sampling unit 13 sends signal, and the sampled voltage of feedback is obtained from sampling unit 13.
The rear terminal voltage for the main contactor KM1 that lower electric control unit 11 obtains in the sampling of sampling unit 13 is higher than setting voltage
When, braking resistor control unit 12 is entered standby mode and upload fault message, i.e., to control system (such as electric automobile
Whole-control system) feedback main contactor KM1 there is adhesion fault.If the main contactor KM1 that the sampling of sampling unit 13 obtains
Rear terminal voltage be less than or equal to setting voltage, then descend the main contactor KM1 in the confirmation of electric control unit 11 braking resistor loop without
Adhesion, and the power supply of braking resistor control unit 12 is disconnected, normally lower control is electric for control system.
Above-mentioned braking resistor loop contactor adhesion detecting system circuit structure is relatively simple, does not extend out the tributary inspection of complexity
Slowdown monitoring circuit and sample circuit, can quickly be positioned during failure, install with dismantle it is convenient；And above-mentioned braking resistor is returned
Road contactor adhesion detecting system detection time is short, does not influence control system normally lower electricity, high safety, accuracy of detection is wanted
Ask relatively low.In addition, the electricity that above-mentioned braking resistor loop contactor adhesion detecting system passes through quick release main contactor KM1 rear ends
The residual voltage of capacitive load is hindered in road, can effectively prevent from judging by accident caused by voltage sample error, while in software strategy
Flexibility is high, possesses stronger autgmentability.
To ensure that adhesion detection process does not influence control system normally lower electricity, while can take into account the correctness of adhesion detection,
Above-mentioned first preset time can be the physics delay time that main contactor KM1 disconnects, the physics delay time by multifactor impact,
Such as main contactor KM1 specifications and models, design, life-span, operating mode influence, specifically can be according to main contactor KM1 parameter setting.
Above-mentioned second preset time be the first preset time and main contactor KM1 back-end circuits the discharge lag time it
With.Wherein, the simplified model of the load of main contactor KM1 rear ends is R1C1 circuits, when main contactor KM1 disconnects and enters actively
After discharge mode, voltage (i.e. A points in Fig. 1) decline curve of main contactor KM1 rear ends is as shown in Fig. 2 buffering electric capacity C1 two
The terminal voltage value formula that changes with time is：
Wherein, τ=RC, R are braking resistor R resistance value, and C is buffering electric capacity C1 capacitance, U0For main contactor KM1
Terminal voltage after main contactor KM1 before disconnection.The discharge lag time, T was selected according to the parameter of braking resistor control unit 12,
According to corresponding software strategy, voltage sample point (T, the U on braking resistor discharge curve are takent), the voltage of sampled point to be detected
Value Ut=δ × U0(δ is percent coefficient, is assessed according to the flash-over characteristic of hardware), is back-calculated to obtain discharge lag time T.I.e.
The discharge lag time, T was：In the case where main contactor KM1 does not stick together, main contactor is disconnected to from main contactor KM1
The voltage of KM1 rear end drops to the time of preset value.
As shown in figure 3, be the schematic flow sheet of contactor adhesion detection method embodiment in braking resistor loop of the present invention, on
Stating braking resistor loop includes electrokinetic cell, main contactor, braking resistor, buffering electric capacity and semiconductor switch pipe, and brakes
Resistance, buffering electric capacity and semiconductor switch pipe are connected to the rear end of main contactor.The detection method of the present invention includes following step
Suddenly：
Step S31：From braking resistor control unit to the control terminal output pulse width modulated signal of semiconductor switch pipe,
So that the electric energy of electrokinetic cell is released by braking resistor.
Step S32：Step S33 is performed after lower electricity instruction is received, otherwise continues executing with step S31.
Step S33：Disconnect main contactor (performing main contactor opening operation), and first preset time that is delayed.This
One preset time can be the physics delay time that main contactor disconnects, and the physics delay time is by multifactor impact, such as main contact
The specifications and models of device, design, life-span, operating mode etc. influence, specifically can be according to the parameter setting of main contactor.
Step S34：From braking resistor control unit to the control terminal output pulse width modulated signal of semiconductor switch pipe,
Active discharge is carried out to main contactor back-end circuit, that is, discharges the residual electricity that capacitive load is hindered in the circuit of main contactor rear end
Pressure.
Step S35：Electric delay time under delay.The lower electric delay time is：In the situation that main contactor does not stick together
Under, the rear terminal voltage that main contactor is disconnected to from main contactor drops to time of preset value.The lower electric delay time specifically may be used
When being discharged according to main contactor back-end circuit, main contactor rear end voltage change curve is counter to push away acquisition.
Step S36：The rear terminal voltage of main contactor is sampled, and is higher than in the rear terminal voltage for sampling the main contactor obtained and sets
When determining voltage, step S37 is performed, otherwise performs step S38.
Step S37：Feed back main contactor adhesion fault.It can confirm that adhesion fault occurs in main contactor, makes system in the case of this
Dynamic resistance control unit enters standby mode and uploads fault message.
Step S38：Control system is normally lower electric.Now confirm that the main contactor in braking resistor loop without adhesion, disconnects system
The power supply of dynamic resistance control unit.
The foregoing is only a preferred embodiment of the present invention, but protection scope of the present invention be not limited thereto,
Any one skilled in the art the invention discloses technical scope in, the change or replacement that can readily occur in,
It should all be included within the scope of the present invention.Therefore, protection scope of the present invention should be with scope of the claims
It is defined.
Claims (10)
1. a kind of braking resistor loop contactor adhesion detecting system, the braking resistor loop includes electrokinetic cell, main contact
Device, braking resistor, buffering electric capacity and semiconductor switch pipe, and the braking resistor, buffering electric capacity and semiconductor switch pipe
It is connected to the rear end of the main contactor, it is characterised in that the detecting system includes braking resistor control unit, sampling unit
And lower electric control unit, wherein：
The braking resistor control unit, for after lower electricity instruction and first preset time that is delayed is received, passing through described half
Conductor switching tube carries out active discharge to the circuit of the main contactor rear end；
The sampling unit, for after lower electricity instruction and second preset time that is delayed is received, sampling the main contactor
Terminal voltage afterwards；
The lower electric control unit, when the rear terminal voltage of the main contactor for being obtained in sampling is higher than setting voltage, make
The braking resistor control unit enters standby mode and uploads fault message.
2. contactor adhesion detecting system in braking resistor loop according to claim 1, it is characterised in that described first is pre-
If the time is the physics delay time that the main contactor disconnects, second preset time is first preset time and institute
State the discharge lag time sum of main contactor back-end circuit.
3. contactor adhesion detecting system in braking resistor loop according to claim 2, it is characterised in that the electric discharge is prolonged
When the time be：In the case where the main contactor does not stick together, the main contactor is disconnected to from the main contactor
Terminal voltage drops to the time of preset value afterwards.
4. contactor adhesion detecting system in braking resistor loop according to claim 1, it is characterised in that：It is automatically controlled under described
When the rear terminal voltage for the main contactor that unit processed obtains in sampling is less than or equal to setting voltage, the braking resistor is disconnected
The power supply of control unit.
5. contactor adhesion detecting system in braking resistor loop according to claim 1, it is characterised in that：The detection system
System includes main contactor control unit, for controlling the main contactor to disconnect after lower electricity instruction is received.
6. a kind of braking resistor loop contactor adhesion detection method, the braking resistor loop includes electrokinetic cell, main contact
Device, braking resistor, buffering electric capacity and semiconductor switch pipe, and the braking resistor, buffering electric capacity and semiconductor switch pipe
It is connected to the rear end of the main contactor, it is characterised in that the detection method comprises the following steps：
After lower electricity instruction and first preset time that is delayed is received, main contactor back-end circuit is entered by semiconductor switch pipe
Row active discharge；
After lower electricity instruction and second preset time that is delayed is received, the rear terminal voltage of the main contactor is sampled；
When the rear terminal voltage for the main contactor that sampling obtains is higher than setting voltage, enters braking resistor control unit and treat
Machine pattern simultaneously uploads fault message.
7. contactor adhesion detection method in braking resistor loop according to claim 6, it is characterised in that described first is pre-
If the time is the physics delay time that the main contactor disconnects, second preset time is first preset time and institute
State the discharge lag time sum of main contactor back-end circuit.
8. contactor adhesion detection method in braking resistor loop according to claim 7, it is characterised in that the electric discharge is prolonged
When the time be：In the case where the main contactor does not stick together, the main contactor is disconnected to from the main contactor
Terminal voltage drops to the time of preset value afterwards.
9. contactor adhesion detection method in braking resistor loop according to claim 6, it is characterised in that the detection side
Method also includes：When the rear terminal voltage for the main contactor that sampling obtains is less than or equal to setting voltage, the braking is disconnected
The power supply of resistance control unit.
10. contactor adhesion detection method in braking resistor loop according to claim 6, it is characterised in that the detection
Method includes：The main contactor is controlled to disconnect after lower electricity instruction is received.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711043520.0A CN107797056B (en) | 2017-10-31 | 2017-10-31 | Braking resistor circuit contactor adhesion detection system and method |
| PCT/CN2018/112159 WO2019085836A1 (en) | 2017-10-31 | 2018-10-26 | Adhesion detection system and method for braking resistance loop contactor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711043520.0A CN107797056B (en) | 2017-10-31 | 2017-10-31 | Braking resistor circuit contactor adhesion detection system and method |
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| Publication Number | Publication Date |
|---|---|
| CN107797056A true CN107797056A (en) | 2018-03-13 |
| CN107797056B CN107797056B (en) | 2019-05-31 |
Family
ID=61548665
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711043520.0A Active CN107797056B (en) | 2017-10-31 | 2017-10-31 | Braking resistor circuit contactor adhesion detection system and method |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN107797056B (en) |
| WO (1) | WO2019085836A1 (en) |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109444722A (en) * | 2018-12-22 | 2019-03-08 | 中国科学院宁波材料技术与工程研究所 | A kind of discharge circuit fault detection means and its method for detecting failure |
| CN109490768A (en) * | 2018-11-12 | 2019-03-19 | 北京长城华冠汽车科技股份有限公司 | The redundance judging method and system of contacts of contactor adhesion |
| CN109521359A (en) * | 2018-12-28 | 2019-03-26 | 华人运通控股有限公司 | A kind of negative relay status detection circuit of power battery master and method |
| CN109709479A (en) * | 2018-12-29 | 2019-05-03 | 深圳市英威腾电动汽车驱动技术有限公司 | Contactor adhesion detection circuit and contactor adhesion detection method |
| WO2019085836A1 (en) * | 2017-10-31 | 2019-05-09 | 苏州汇川联合动力系统有限公司 | Adhesion detection system and method for braking resistance loop contactor |
| CN109733198A (en) * | 2018-11-30 | 2019-05-10 | 铜陵市优车科技有限公司 | Main contactor adhesion detection method and device, electrokinetic cell system, vehicle |
| CN109917280A (en) * | 2019-02-21 | 2019-06-21 | 东软睿驰汽车技术（沈阳）有限公司 | A kind of circuit state detection system and its detection method and a kind of high tension loop |
| CN110620019A (en) * | 2018-06-20 | 2019-12-27 | 森萨塔科技（常州）有限公司 | Hybrid DC contactor and online diagnosis system thereof |
| CN112083323A (en) * | 2020-07-23 | 2020-12-15 | 浙江高泰昊能科技有限公司 | Relay adhesion detection circuit and detection method thereof |
| CN112234584A (en) * | 2020-09-17 | 2021-01-15 | 邯郸钢铁集团有限责任公司 | Improved voltage type frequency converter brake circuit protection method |
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| WO2019085836A1 (en) * | 2017-10-31 | 2019-05-09 | 苏州汇川联合动力系统有限公司 | Adhesion detection system and method for braking resistance loop contactor |
| CN110620019A (en) * | 2018-06-20 | 2019-12-27 | 森萨塔科技（常州）有限公司 | Hybrid DC contactor and online diagnosis system thereof |
| CN109490768B (en) * | 2018-11-12 | 2021-01-26 | 北京长城华冠汽车科技股份有限公司 | Redundancy judgment method and system for contactor contact adhesion |
| CN109490768A (en) * | 2018-11-12 | 2019-03-19 | 北京长城华冠汽车科技股份有限公司 | The redundance judging method and system of contacts of contactor adhesion |
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| CN109709479A (en) * | 2018-12-29 | 2019-05-03 | 深圳市英威腾电动汽车驱动技术有限公司 | Contactor adhesion detection circuit and contactor adhesion detection method |
| CN109917280A (en) * | 2019-02-21 | 2019-06-21 | 东软睿驰汽车技术（沈阳）有限公司 | A kind of circuit state detection system and its detection method and a kind of high tension loop |
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| US11397203B2 (en) | 2019-09-24 | 2022-07-26 | Delta Electronics, Inc. | Estimating method for braking resistor |
| CN112083323A (en) * | 2020-07-23 | 2020-12-15 | 浙江高泰昊能科技有限公司 | Relay adhesion detection circuit and detection method thereof |
| CN112234584A (en) * | 2020-09-17 | 2021-01-15 | 邯郸钢铁集团有限责任公司 | Improved voltage type frequency converter brake circuit protection method |
Also Published As
| Publication number | Publication date |
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| WO2019085836A1 (en) | 2019-05-09 |
| CN107797056B (en) | 2019-05-31 |
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