CN109270424A - Automobile air conditioner electromagnetic clutch coil freewheeling diode detection device and detection method - Google Patents
Automobile air conditioner electromagnetic clutch coil freewheeling diode detection device and detection method Download PDFInfo
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- CN109270424A CN109270424A CN201811293074.3A CN201811293074A CN109270424A CN 109270424 A CN109270424 A CN 109270424A CN 201811293074 A CN201811293074 A CN 201811293074A CN 109270424 A CN109270424 A CN 109270424A
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- electromagnetic clutch
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- 238000001514 detection method Methods 0.000 title claims abstract description 72
- 230000001105 regulatory effect Effects 0.000 claims abstract description 15
- 230000000007 visual effect Effects 0.000 claims abstract description 11
- 230000005540 biological transmission Effects 0.000 claims abstract description 8
- 238000000034 method Methods 0.000 claims description 16
- 238000004378 air conditioning Methods 0.000 claims description 7
- 230000015556 catabolic process Effects 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 description 7
- 230000005611 electricity Effects 0.000 description 3
- 238000004891 communication Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000000700 radioactive tracer Substances 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 1
- 238000002679 ablation Methods 0.000 description 1
- 229960001506 brilliant green Drugs 0.000 description 1
- HXCILVUBKWANLN-UHFFFAOYSA-N brilliant green cation Chemical compound C1=CC(N(CC)CC)=CC=C1C(C=1C=CC=CC=1)=C1C=CC(=[N+](CC)CC)C=C1 HXCILVUBKWANLN-UHFFFAOYSA-N 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 239000011258 core-shell material Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Classifications
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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
- G01R31/26—Testing of individual semiconductor devices
- G01R31/2607—Circuits therefor
- G01R31/2632—Circuits therefor for testing diodes
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- General Physics & Mathematics (AREA)
- Air-Conditioning For Vehicles (AREA)
Abstract
The present invention gives a kind of automobile air conditioner electromagnetic clutch coil freewheeling diode detection devices；D.C. regulated power supply the two poles of the earth are connected to positive and negative anodes switching relay input terminal respectively, and positive and negative anodes switching relay is connected to automobile air conditioner electromagnetic clutch coil, and current sensor is arranged on the circuit between D.C. regulated power supply and positive and negative anodes switching relay.As long as user connects the positive and negative anodes of coil lead and detector, product is detected automatically.The present invention gives a kind of detection method, comprising the following steps: coil assembly to be measured is connect with channel switching relay, collects the signal I1 for receiving current sensor transmission；Controller action positive and negative anodes switch the reversal connection of relay positive and negative electrode circuit, receive the signal I2 of current sensor transmission；I1 and I2 is compared by controller with the operating current of coil assembly respectively, is judged no with following failure: breaking, the reversed, puncture short either with or without diode or diode；Controller controls combined aural and visual alarm and issues alarm signal.
Description
Technical field
The present invention relates to a kind of automobile air conditioner electromagnetic clutch coil freewheeling diode detection devices.
Automobile is detected using automobile air conditioner electromagnetic clutch coil freewheeling diode detection device the invention further relates to a kind of
The method of air-conditioning electromagnetic clutch coil assembly.
Background technique
Automobile air conditioner electromagnetic clutch coil assembly product is mainly by an iron core shell, a coil, a Schottky two
Pole pipe, lead-out wire, connector composition, Schottky diode are connected to coil both ends, and formed circuit in parallel,
The high electromotive force for generating coil in circuit with continuous current system consumption, using freewheeling diode be in order to prevent air conditioning for automobiles from
Clutch coil generates a kind of protection element of reverse current ablation relay coil after disconnecting, to play its in protection circuit
The not impaired effect of its element.Coil assembly will cause in process of production diode is reversed, miss or not in contact with it is upper, connect it is short
Phenomena such as road, causes coil assembly cisco unity malfunction, or damages to other components, and relay coil is in power-off wink
Between can generate very high voltage (for the several times of coil rating voltage or even more than ten times), the diode and coils from parallel connection of coils are constituted one time
Road, the energy moment for storing coil discharge.To prevent generating high-voltage breakdown danger to other circuits and component.
Traditional automobile air conditioner electromagnetic clutch coil freewheeling diode detection method is surveyed using multimeter diode shelves
The method of on-off is detected using the method that transistor curve tracer measures.Its principle is using freewheeling diode by a PN
The semiconductor devices constituted is tied, there is unilateal conduction characteristic.By its forward and reverse resistance value with multimeter detection, can differentiate
The electrode of diode out can also estimate whether diode damages.When normal, forward resistance value is 2.5~3.5 Europe, reversely
Resistance value is infinity.If measuring positive and negative resistance value is infinitely great or close to 0, illustrate that the diode has been opened a way or hit
Wear damage.
Due to fully relying on and manually being observed with eye using traditional multimeter measurement and transistor curve tracer method,
Measuring speed is slower, and reliability and accuracy are poor, be easy to cause test leakage, error or error in judgement, can not 100% guarantee produce
Quality.A large amount of artificial and instrument is needed using traditional measurement method simultaneously, causes the rising of production cost, efficiency is inclined
It is low.
Summary of the invention
Technical problem to be solved by the invention is to provide a kind of automobile air conditioner electromagnetics easy to use, improving detection efficiency
Clutch coil freewheeling diode detection device.
The present invention also technical problems to be solved are to provide a kind of side for detecting automobile air conditioner electromagnetic clutch coil assembly
Method.
In order to solve the above technical problems, the present invention provides a kind of inspections of automobile air conditioner electromagnetic clutch coil freewheeling diode
Survey device；
Including D.C. regulated power supply, positive and negative anodes switching relay, current sensor and controller, D.C. regulated power supply the two poles of the earth difference
It is connected to positive and negative anodes switching two input terminals of relay, positive and negative anodes switch two output terminals of relay and automobile air conditioner electromagnetic
Clutch coil connection, current sensor are arranged on the circuit between D.C. regulated power supply and positive and negative anodes switching relay；
Circuit just connects or is reversely connected between two output terminals and two input terminals of controller action positive and negative anodes switching relay,
Controller receives the analog signals of current sensor transmission in the process.
Technology contents of the invention are understood in order to clearer, below by this automobile air conditioner electromagnetic clutch coil afterflow two
Pole pipe detection device is referred to as this detection device.
It is also set up on the circuit between relay preferably, the D.C. regulated power supply and positive and negative anodes of this detection device switch
Finite electric current resistance.
Preferably, this detection device further includes output channel switching relay, positive and negative anodes switching relay passes through channel
Switching relay is connected to automobile air conditioner electromagnetic clutch coil, and two output terminals of positive and negative anodes switching relay are cut with channel
The input terminal connection of relay is changed, channel switches relay and is equipped with equivalent several groups output terminal, every group of output end attached bag
Include positive output terminals and negative output terminals, the work of this automobile air conditioner electromagnetic clutch coil freewheeling diode detection device
When, it is electric that the same time only has one group of output terminal to obtain.
Preferably, this detection device further includes combined aural and visual alarm, controller controls combined aural and visual alarm in air conditioning for automobiles electricity
Magnet clutch coil assembly occurs issuing sound and light alarm signal when reversal connection, short circuit, open circuit.
Preferably, the controller of this detection device is PLC programmable controller.
With such a structure, this detection device has Intellisense function, as long as user is by two lead-out wires of coil
It is connect with the positive and negative anodes of detector, this detection device automatically detects product, and provides result prompt.Brilliant green when qualified
Lamp is sent out a warning when unqualified with buzzing alarm, and detection time can sets itself.
This detection device improves production efficiency, has multichannel alternating detection function, not only eliminates one product of detection
It needs artificial wiring twice or presses the movement of the detection of button twice, while can be by first time by the time of product and instrument grafting
It uses, reduces the production line waiting time.
In order to solve the above technical problems, being continued the present invention provides a kind of using above-mentioned automobile air conditioner electromagnetic clutch coil
Flow the method for diode detection device detection automobile air conditioner electromagnetic clutch coil assembly, comprising the following steps:
A) automobile air conditioner electromagnetic clutch coil assembly to be measured is connect with channel switching any one group of output terminal of relay,
Positive output terminals are connect with the anode of automobile air conditioner electromagnetic clutch coil assembly, negative output terminals and automobile air conditioner electromagnetic
The cathode of clutch coil assembly connects, and controller collects the analog signals I1 for receiving current sensor transmission；
B) after the completion of step a), controller action positive and negative anodes switch relay and switch relay to two output terminals and positive and negative anodes
Device is reversely connected the circuit between two input terminals, and controller receives the analog signals I2 of current sensor transmission；
C) I1 and I2 is compared by controller with the operating current of automobile air conditioner electromagnetic clutch coil assembly respectively:
When the operating current of I1 and automobile air conditioner electromagnetic clutch coil assembly coincide, I2 levels off to instrument and limits maximum current
When, automobile air conditioner electromagnetic clutch coil freewheeling diode detection device judges this automobile air conditioner electromagnetic clutch coil assembly
Schottky diode is just connecing and working properly；
Alternatively, when I1 level off to instrument limit maximum current, the operating current of I2 and automobile air conditioner electromagnetic clutch coil assembly
When coincideing, automobile air conditioner electromagnetic clutch coil freewheeling diode detection device judges that this automobile air conditioner electromagnetic clutch coil is total
Schottky diode reversal connection in, executes step d)；
Alternatively, when I1 level off to 0, I2 also level off to 0 when, automobile air conditioner electromagnetic clutch coil freewheeling diode detection device is sentenced
Break the line broken circuit in this automobile air conditioner electromagnetic clutch coil assembly or coil does not connect state, executes step d)；
Alternatively, the operating current when I1 and automobile air conditioner electromagnetic clutch coil assembly coincide, I2 also with automobile air conditioner electromagnetic from
When the operating current of clutch coil assembly coincide, automobile air conditioner electromagnetic clutch coil freewheeling diode detection device judges this vapour
Schottky diode in vehicle air-conditioning electromagnetic clutch coil assembly is in open circuit or missing diode state, executes step d)；
Alternatively, when I1 instrument limits maximum current, for I2 when also instrument limits maximum current, automobile air conditioner electromagnetic clutch coil is continuous
Stream diode detection device judges that the Schottky diode in this automobile air conditioner electromagnetic clutch coil assembly is in breakdown or short
Line state executes step d)；
D) controller control combined aural and visual alarm issues alarm signal.
After such method, according to the characteristic of automobile air conditioner electromagnetic clutch and Schottky diode, pass through acquisition
The current signal of circuit under different on-states, judges whether Schottky diode has following failure: 1, either with or without diode
Or diode open circuit；2, diode is reversed；3, diode breakdown short circuit;When there are above-mentioned three kinds of situations, instrument automatic alarm.
Detailed description of the invention
Fig. 1 is the structural block diagram of this detection device embodiment.
Specific embodiment
As shown in Figure 1
This detection device 1 is cut including D.C. regulated power supply 11, positive and negative anodes switching relay 14, current sensor 12, output channel
Change relay 15, combined aural and visual alarm 16, ration the power supply leakage resistance 13 and controller 17.
Alternating current 2 connects pressure regulating box and AC/DC converter, pressure regulating box are connected with AC-DC converter, and city 2 nets of electricity are through toning
It presses case to export and stablizes alternating current, stable alternating current inputs AC-DC converter, becomes stable 24V direct current, and then obtains straight
Regulated power supply 11 is flowed, stable DC source is exported.
11 the two poles of the earth of D.C. regulated power supply are connected to positive and negative anodes switching 14 two input terminals of relay respectively, DC voltage-stabilizing electricity
Electric current is in series on circuit between the positive V+ in source 11 input terminal V2+ corresponding with 14 anode of positive and negative anodes switching relay to pass
Sensor 12 and leakage resistance 13 of rationing the power supply, leakage resistance 13 of rationing the power supply limit current in the range of safety, therefore will not be in detection process
In cause the diode in product to damage.
Two output terminals of positive and negative anodes switching relay 14 are connected to the input terminal of channel switching relay 15, channel
Switch relay 15 and be equipped with two groups of equivalent output terminals, every group of output terminal includes positive output terminals and cathode output end
Son, this detection device 1 work when, it is electric that the same time only has one group of output terminal to obtain, i.e., CH1+, CH1- obtain electric or CH2+,
CH2- obtain it is electric, when this detection device 1 detects, for the first time by starting detection when, the first via output CH1+, CH1- are detected, the
After detecting all the way, when being again started up detection, then the second tunnel output CH2+, CH2- detection, such two-way circulation output detection.
Controller 17 is PLC programmable controller, and controller 17 acts on two output ends of positive and negative anodes switching relay 14
Son and the circuit between two input terminals A, B are reversely connected, and controller 17 receives the mould that current sensor 12 transmits in the process
Analog quantity signal.
Controller 17 control combined aural and visual alarm 16 automobile air conditioner electromagnetic clutch coil assembly 3 occur reversal connection, short circuit, open
Sound and light alarm signal is issued when road.
This detection device 1 may be fitted with person-computer union 19 and operation button 18, and controller 17 passes through industry
Communication bus receives and sends signal to person-computer union 19, and I/O signal is fed back to controller 17 by operation button 18, control
Device 17 processed issues I/O and controls signal to combined aural and visual alarm 16, positive and negative anodes switching relay 14, channel switching relay 15.
This detection device 1 has the not damaged function of short time output short-circuit, the positive and negative anodes of output are directly shorted not
It will cause the damage of this detection device 1, but must not short circuit for a long time.
It is more than utilization automobile air conditioner electromagnetic clutch coil freewheeling diode detection device detection automobile air conditioner electromagnetic from
The method of clutch coil assembly 3, comprising the following steps:
A) automobile air conditioner electromagnetic clutch coil assembly 3 to be measured connects with channel switching 15 any one groups of output terminals of relay
It connects, positive output terminals are connect with the anode of automobile air conditioner electromagnetic clutch coil assembly 3, negative output terminals and air conditioning for automobiles
The cathode of electromagnetic clutch coil assembly 3 connects, and controller 17, which is collected, receives the analog signals I1 that current sensor 12 transmits；
B) after the completion of step a), controller 17 acts on positive and negative anodes switching relay 14 and switches to two output terminals and positive and negative anodes
Relay 14 is reversely connected two input terminals, and controller 17 receives the analog signals I2 that current sensor 12 transmits；
C) I1 and I2 is compared by controller 17 with the operating current of automobile air conditioner electromagnetic clutch coil assembly 3 respectively:
When the operating current of I1 and automobile air conditioner electromagnetic clutch coil assembly 3 coincide, I2 levels off to instrument and limits maximum current
When, automobile air conditioner electromagnetic clutch coil freewheeling diode detection device judges this automobile air conditioner electromagnetic clutch coil assembly 3
Schottky diode just connecing and working properly；
Alternatively, when I1 level off to instrument limit maximum current, the operating current of I2 and automobile air conditioner electromagnetic clutch coil assembly 3
When coincideing, automobile air conditioner electromagnetic clutch coil freewheeling diode detection device judges that this automobile air conditioner electromagnetic clutch coil is total
At the Schottky diode reversal connection in 3, step d) is executed；
Alternatively, when I1 level off to 0, I2 also level off to 0 when, automobile air conditioner electromagnetic clutch coil freewheeling diode detection device is sentenced
Break the line broken circuit in this automobile air conditioner electromagnetic clutch coil assembly or coil does not connect state, executes step d)；
Alternatively, the operating current when I1 and automobile air conditioner electromagnetic clutch coil assembly coincide, I2 also with automobile air conditioner electromagnetic from
When the operating current of clutch coil assembly coincide, automobile air conditioner electromagnetic clutch coil freewheeling diode detection device judges this vapour
Schottky diode in vehicle air-conditioning electromagnetic clutch coil assembly is in open circuit or missing diode state, executes step d)；
Alternatively, when I1 level off to instrument limit maximum current, I2 also level off to instrument limit maximum current when, automobile air conditioner electromagnetic
Clutch coil freewheeling diode detection device judges the Schottky diode in this automobile air conditioner electromagnetic clutch coil assembly 3
In puncture short or automobile air conditioner electromagnetic clutch coil line short-circuit condition, step d) is executed；
D) controller 17 controls combined aural and visual alarm 16 and issues alarm signal.
Electric current of this detection device 1 when controlling detection constant current no more than diode, prevents from damaging in detection process
Diode；Under the control of programmable controller 17, power positive cathode switching when just connecing and be reversely connected is realized, and in binary channels
When output detection, under the control of programmable controller 17, the switching between two channels is realized.
It is realized using sensor technology, programmable logic controller (PLC) 17, touch screen and industrial bus mechanics of communication from dynamic
Know whether product has connected, automatically detection, automatic alarm, be automatically stored function, and can be using industrial bus and following intelligence
It can manufacture system seamless interfacing.In order to improve the production efficiency, this instrument has two-way alternating detection function, not only eliminates detection
One product needs artificial wiring twice or presses the movement of button detection twice, while first time can be inserted product and instrument
The time utilization connect reduces the production line waiting time.
Above-described is only one embodiment of the present invention, it is noted that for those of ordinary skill in the art
For, without departing from the principle of the present invention, several variations and modifications can also be made, these also should be regarded as belonging to this hair
Bright protection scope.
Claims (6)
1. a kind of automobile air conditioner electromagnetic clutch coil freewheeling diode detection device, it is characterized in that:
Including D.C. regulated power supply, positive and negative anodes switching relay, current sensor and controller, D.C. regulated power supply the two poles of the earth difference
It is connected to positive and negative anodes switching two input terminals of relay, positive and negative anodes switch two output terminals of relay and automobile air conditioner electromagnetic
Clutch coil connection, current sensor are arranged on the circuit between D.C. regulated power supply and positive and negative anodes switching relay；
Circuit just connects or is reversely connected between two output terminals and two input terminals of controller action positive and negative anodes switching relay,
Controller receives the analog signals of current sensor transmission in the process.
2. automobile air conditioner electromagnetic clutch coil freewheeling diode detection device according to claim 1, it is characterized in that:
Leakage resistance of rationing the power supply is additionally provided on circuit between the D.C. regulated power supply and positive and negative anodes switching relay.
3. automobile air conditioner electromagnetic clutch coil freewheeling diode detection device according to claim 1, it is characterized in that:
It further include output channel switching relay, positive and negative anodes switch relay and switch relay and automobile air conditioner electromagnetic by channel
Two output terminals of clutch coil connection, positive and negative anodes switching relay are connected to the input terminal of channel switching relay,
Channel switches relay and is equipped with equivalent several groups output terminal, and every group of output terminal includes positive output terminals and cathode output
Terminal, when this automobile air conditioner electromagnetic clutch coil freewheeling diode detection device works, the same time only has one group of output end
It is electricly sub.
4. automobile air conditioner electromagnetic clutch coil freewheeling diode detection device according to claim 1, it is characterized in that:
It further include combined aural and visual alarm, controller controls combined aural and visual alarm to be occurred instead in automobile air conditioner electromagnetic clutch coil assembly
Sound and light alarm signal is issued when connecing, is short-circuit, opening a way.
5. automobile air conditioner electromagnetic clutch coil freewheeling diode detection device according to claim 1, it is characterized in that:
Controller is PLC programmable controller.
6. a kind of automobile air conditioner electromagnetic clutch coil freewheeling diode detection device using as described in claim 1 to 5
The method for detecting automobile air conditioner electromagnetic clutch coil assembly, comprising the following steps:
A) automobile air conditioner electromagnetic clutch coil assembly to be measured is connect with channel switching any one group of output terminal of relay,
Positive output terminals are connect with the anode of automobile air conditioner electromagnetic clutch coil assembly, negative output terminals and automobile air conditioner electromagnetic
The cathode of clutch coil assembly connects, and controller collects the analog signals I1 for receiving current sensor transmission；
B) after the completion of step a), controller action positive and negative anodes switch relay and switch relay to two output terminals and positive and negative anodes
Device is reversely connected two input terminals, and controller receives the analog signals I2 of current sensor transmission；
C) I1 and I2 is compared by controller with the operating current of automobile air conditioner electromagnetic clutch coil assembly respectively:
When the operating current of I1 and automobile air conditioner electromagnetic clutch coil assembly coincide, I2 levels off to instrument and limits maximum current
When, automobile air conditioner electromagnetic clutch coil freewheeling diode detection device judges this automobile air conditioner electromagnetic clutch coil assembly
Schottky diode is just connecing and working properly；
Alternatively, when I1 level off to instrument limit maximum current, the operating current of I2 and automobile air conditioner electromagnetic clutch coil assembly
When coincideing, automobile air conditioner electromagnetic clutch coil freewheeling diode detection device judges that this automobile air conditioner electromagnetic clutch coil is total
Schottky diode reversal connection in, executes step d)；
Alternatively, when I1 level off to 0, I2 also level off to 0 when, automobile air conditioner electromagnetic clutch coil freewheeling diode detection device is sentenced
Break the line broken circuit in this automobile air conditioner electromagnetic clutch coil assembly or coil does not connect state, executes step d)；
Alternatively, the operating current when I1 and automobile air conditioner electromagnetic clutch coil assembly coincide, I2 also with automobile air conditioner electromagnetic from
When the operating current of clutch coil assembly coincide, automobile air conditioner electromagnetic clutch coil freewheeling diode detection device judges this vapour
Schottky diode in vehicle air-conditioning electromagnetic clutch coil assembly is in open circuit or missing diode state, executes step d)；
Alternatively, when I1 instrument limits maximum current, for I2 when also instrument limits maximum current, automobile air conditioner electromagnetic clutch coil is continuous
Stream diode detection device judges that the Schottky diode in this automobile air conditioner electromagnetic clutch coil assembly is in breakdown or short
Line state executes step d)；
D) controller control combined aural and visual alarm issues alarm signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811293074.3A CN109270424A (en) | 2018-11-01 | 2018-11-01 | Automobile air conditioner electromagnetic clutch coil freewheeling diode detection device and detection method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811293074.3A CN109270424A (en) | 2018-11-01 | 2018-11-01 | Automobile air conditioner electromagnetic clutch coil freewheeling diode detection device and detection method |
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| Publication Number | Publication Date |
|---|---|
| CN109270424A true CN109270424A (en) | 2019-01-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811293074.3A Pending CN109270424A (en) | 2018-11-01 | 2018-11-01 | Automobile air conditioner electromagnetic clutch coil freewheeling diode detection device and detection method |
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| CN (1) | CN109270424A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110082600A (en) * | 2019-03-26 | 2019-08-02 | 阿尔特汽车技术股份有限公司 | A kind of Hybrid Vehicle electromagnetic clutch resistance measurement pilot system and method |
| CN112782493A (en) * | 2019-11-05 | 2021-05-11 | 株洲中车时代电气股份有限公司 | Converter module function detection device and method |
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| CN201159753Y (en) * | 2008-01-29 | 2008-12-03 | 安徽昊方机电股份有限公司 | Diode detection apparatus for automobile air conditioner electromagnetic clutch |
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| CN209086383U (en) * | 2018-11-01 | 2019-07-09 | 安徽力格智能科技有限公司 | Automobile air conditioner electromagnetic clutch coil freewheeling diode detection device |
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2018
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| US5428294A (en) * | 1993-08-11 | 1995-06-27 | Chrysler Corporation | Reverse/forward bias tester for relay and diode packages |
| CN201159753Y (en) * | 2008-01-29 | 2008-12-03 | 安徽昊方机电股份有限公司 | Diode detection apparatus for automobile air conditioner electromagnetic clutch |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110082600A (en) * | 2019-03-26 | 2019-08-02 | 阿尔特汽车技术股份有限公司 | A kind of Hybrid Vehicle electromagnetic clutch resistance measurement pilot system and method |
| CN112782493A (en) * | 2019-11-05 | 2021-05-11 | 株洲中车时代电气股份有限公司 | Converter module function detection device and method |
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