자동차 과도 배출 테스트 시스템

1. 장비에 대한 기본 이해

1.1 모델 분류

LISUN 모델	리스-테미-50A	리스-테미-100A	리스-테미-150A
DUT 용량	80 V / 50 A	80 V / 100 A	80 V / 150 A
제품명	Automotive Transient Emission Test System (Power Cables)
모니터링 인터페이스	N형 1:1 동축 단자 출력
병렬 저항	[Rs]: 개방 회로, 10Ω, 20Ω, 40Ω, 120Ω
트리거 방법	Automatic, One-Time, External Trigger
모드 선택	기계식 스위치, 전자식 스위치
Instrument Grounding Connection Methods	Banana Plug Cables ≤ 10 mm
Artificial Mains Network Parameters
진동수	0.1MHz~100MHz
정전 용량	0.1μF
임피던스	5 μH||50 Ω, conforms to the impedance curve specified in ISO 7637-2
DC 저항	5mΩ 미만
Electronic Switch Specifications
Start and Stop Times	0.01–99.99 s + (10% + 10 ms)
운영 시간	300 ns + 20% @ load 50 μH/0.6 Ω
과도 보호 전압	440 V
Mechanical Switch Specifications
Start and Stop Times	0.01–99.99 s + (10% + 10 ms)
접점	High-purity silver, with no contact inhibition
행동 시간	Close: 20 ms; Open: 10 ms

1.2 적용 기준

ISO 7637-2, “Road Vehicles—Electrical Disturbances Caused by Conduction and Coupling—Part 2: Electrical Transients Conducted Along Power Lines,” Clause 4.3, Appendix B

GB/T 21437.2-2021 “Road Vehicles—Test Methods for Electromagnetic Disturbances Caused by Conduction and Coupling in Electrical/Electronic Components—Part 2: Conducted Transient Emissions and Immunity Along Power Lines,” Clause 4.3, Appendix B

1.3 응용 프로그램 시나리오

The LIS-TEMI Series Automotive Transient Emission Test System is a power line transient conducted emission test bench specifically designed for the research and development of in-vehicle electrical and electronic components. It is used to evaluate the level of voltage transient disturbances generated by the device under test (hereinafter referred to as DUT) during power on/off transitions and to verify whether the product complies with relevant automotive electromagnetic compatibility standards.

The system simulates the impedance characteristics of vehicle wiring harnesses using an artificial network. Combined with high-precision switching modules and adjustable shunt resistors, it can perform two types of transient emission Test: slow pulses (millisecond-level) and fast pulses (microsecond-level). It is widely used by automotive parts manufacturers and third-party testing laboratories for electromagnetic compatibility (EMC) research and development as well as compliance verification.

1.4 핵심 테스트 기능

1.4.1 Slow-Pulse Transient Emission Test

For voltage transient disturbances in the millisecond range and slower, this test is suitable for DUTs with inductive loads driven by internal switches, and simulates slow transient disturbance emission Test caused by the vehicle ignition switch or a relay opening.

1.4.2 Fast-Pulse Transient Emission Test

Designed for fast voltage transient disturbances in the microsecond-to-millisecond range, Test is suitable for DUTs without internal switches and simulates fast transient disturbance emissions caused by high-speed switching operations.

2. 사용상의 주의

2.1 환경 요구 사항

Ambient temperature: 23 °C ± 5 °C; relative humidity: 45–75%, non-condensing; altitude: ≤2000 m; no strong vibrations or electromagnetic interference in the vicinity; use of the equipment in dusty or flammable and explosive environments is strictly prohibited.

2.2 전원 공급 장치 요구 사항

Input power supply: AC 220 V ±10%, 50 Hz; Input power: ≤1 kW; The power supply must be reliably grounded, with a grounding resistance of ≤4 Ω; It is recommended to use a voltage-stabilized power supply to prevent power grid fluctuations from affecting test accuracy.

2.3 배선 원리

Use power cables with the specified wire gauge to prevent overheating under high current conditions; keep Test as short as possible and route them in parallel to minimize the effects of parasitic parameters; ensure the DUT (Device Under Test) enclosure is reliably connected to the equipment’s protective ground; and route signal and power cables separately to avoid cross-interference.

2.4 운영 안전 지침

Wear insulated protective gear; Test testing, ensure that all connections are secure and that there are no exposed conductors; do not touch or plug in or unplug any wiring harnesses or cables during Test; if you hear unusual noises, smell an unusual odor, or see smoke, immediately turn off the power.

3. 장비개요

3.1 System Hardware Components

3.1.1 Host Computer

그림 3-1를 참조하세요.

번호	주의 사항
①	Main Control and Manual Network, including a touchscreen and an N-type monitoring interface
②	Mechanical switch with an N-type monitoring interface
③	Electronic Switch, with N-Type Monitoring Interface

3.1.2 액세서리

그림 3-2를 참조하세요.

번호	주의 사항
①	전원 코드
② ③	100mm Standard Connecting Cable
④	200mm Standard Connecting Cable

3.2 Introduction to the Touchscreen Program

그림 3-3를 참조하세요.

번호	주의 사항
①	Switch Mode Selection: To switch between electronic and mechanical switches, the setting must match the hardware of the switch module actually connected.
②	Parallel resistance options: 10Ω, 20Ω, 40Ω, 120Ω, or open circuit. If “open circuit” is selected, the customer may connect a parallel resistor of any other value.
③	Settings for Connection Duration (On/Off)
④	Pulse Count Setting
⑤	DUT Power Supply Control: Controlling the DUT’s Power Supply Output
⑥	Operational Control, Start/Stop Pulse Test

4. Procedures for Automotive Electronic Transient Emission Testing

4.1 테스트 환경 준비

4.1.1 Site and Grounding Requirements

Tests must be conducted in an Electromagnetic Shielding Cabinet or a laboratory with a stable electromagnetic environment to prevent external electromagnetic interference from affecting the Test results.

Place a metal grounding plate with a thickness of ≥2 mm; the plate must be large enough to cover all Test equipment and the DUT, and it must be securely connected to the laboratory grounding system, with a grounding resistance of ≤4 Ω.

Artificial networks and switch modules are placed directly on the metal ground plane. The DUT’s connection cables must be routed parallel to the ground plane at a height of 50 mm ± 5 mm above it.

4.1.2 Electromagnetic Environment Requirements

The test area must be located away from sources of strong electromagnetic interference, such as high-power motors, variable-frequency drives, and high-frequency transmitting equipment.

During testing, avoid turning high-power laboratory equipment on or off to prevent power grid fluctuations from interfering with Test.

4.1.3 보조 장비 준비

Digital Oscilloscope: Minimum sampling rate of 2 GS/s, bandwidth of 400 MHz, and input sensitivity of at least 5 mV/division; power on 30 minutes in advance to allow for warm-up; voltage probes: must be suitable for the test voltage range, have proper bandwidth matching, have the attenuation ratio set correctly, and be calibrated in advance.

DUT DC power supply or battery: The output voltage and current must meet the DUT’s rated operating requirements, and the voltage regulation accuracy must be ≤±0.5%.

Insulated support block: 50 mm ± 5 mm thick, used to raise the DUT and prevent direct contact with the ground plate.

4.2 Test Plan Approval

Test Type Selection

Select the Test type based on the DUT type and Test standard requirements: For DUTs with internal mechanical/electronic switches that drive inductive loads, select Test slow-pulse test; for DUTs without internal switches, select Test fast-pulse test.

Type Testing / Test: Use mechanical switches for slow pulses and electronic switches for fast pulses; there is no need to Test using both types of switches.

파라미터 설정

파라미터	Slow Pulse	빠른 맥박
병렬 저항	Typical values are 10Ω, 20Ω, 40Ω, and 120Ω. For special operating conditions, you can select the “open circuit” setting and connect an external resistor with a custom resistance value. For 12V automotive systems, 20Ω to 50Ω is commonly used; for 24V systems, 40Ω to 120Ω is commonly used.
연결 기간	DUTs are typically inductive loads with internal switches, and their current rise time is relatively long; the turn-on time is usually set to 500 ms to 5 s, depending on the time it takes for the DUT load to reach steady state.	DUTs are typically resistive or slightly inductive loads without internal switches; they reach steady state faster, so the turn-on time can be appropriately shortened—usually set to 100 ms to 1 s—though the core principle remains ensuring stable DUT operation.
Duration of Disconnection	Inductive loads take a long time to demagnetize; the turn-off time is typically set to be at least as long as the turn-on time, usually ranging from 500 ms to 10 s, to ensure the load is fully reset.	The load energy is low, demagnetization is fast, and the disconnection time can be set to ≥100 ms; it is also necessary to ensure that the load is fully reset.
펄스 수	Since the contact state varies slightly each time, Test typically performed 10 to 100 times.	High waveform consistency; typically Test to 50 times

4.3 배선 방법

4.3.1 Wiring Diagram for the Slow-Pulse Test

See Figure 4-1 for the wiring diagram.

Connect the LIS-TEMI as shown in Figure 4-2. From left to right: DUT DC power supply or battery, 100-mm standard connecting cable, mechanical switch, main control unit and manual network, 200-mm standard connecting cable, and DUT.

4.3.2 Wiring Diagram for the Rapid Pulse Test

See Figure 4-3 for the wiring diagram.

Connect the LIS-TEMI as shown in Figure 4-4. From left to right: DUT DC power supply or battery, 200-mm standard connection cable, master controller and manual network, electronic switch, 100-mm standard connection cable, and DUT.

4.4 테스트 결과 평가

Determination is based on the following three rules; if all are met, Test is considered passed.

Rules for Determination	준수 선언문
Transient Emission Amplitude	The peak values of the positive transient voltage and the negative transient voltage must be tested separately, and both must meet the limit requirements.
프로세스 요구 사항	The DUT functioned normally throughout Test
최종 검사 요구사항	No permanent damage was found after Test

5. 장비의 일상 유지보수 및 관리

5.1 일상적인 사용 및 유지 관리

5.1.1 Clean before and after each use

Before Use: Wipe the device’s surface, screen, and ports with a dry, soft cloth to remove dust and stains. Do not use corrosive cleaning agents.

After use: Clean the Test bench, organize the cables, and place dust covers over the device ports to prevent dust from entering the interior.

Screen Cleaning: Gently wipe the screen with a dedicated screen-cleaning cloth, and avoid scratching the touchscreen with hard objects.

Routine Visual and Interface Inspections

Before each use, check the following: the equipment housing for deformation, dents, or rust; the power and signal connector pins for bending, oxidation, or looseness; the power cable and standard Test cables for damage or aging, and the plugs for deformation; and the grounding terminal for a secure connection and signs of oxidation.

5.2 장기 보관 및 유지 관리

저장 환경 요구 사항

Storage temperature: -10°C to 50°C; relative humidity: ≤70%, no condensation; storage environment: dry, well-ventilated, dust-free, free of corrosive gases, and away from direct sunlight and heat sources; the equipment must be stored in its original packaging and placed on a raised surface to prevent moisture exposure.

5.2.2 Preprocessing Before Storage

Clean the equipment thoroughly to remove surface dust and stains; place dust caps over all ports, and neatly organize and bundle the cables to prevent kinks; disconnect all external connections and place a dust bag over the equipment; place desiccant inside the packaging to prevent moisture damage.

5.2.3 Requirements for Periodic Power Supply During Long-Term Storage

If the equipment is stored for more than 3 months, remove it from storage, plug it in, and let it warm up for 1 hour to remove internal moisture. After plugging it in, perform Test to ensure the equipment is operating normally. Replace the desiccant regularly to ensure the storage environment remains dry.

5.3 교정 간격 요구 사항

측정 정확도와 장비의 작동 신뢰성을 보장하기 위해, 자격을 갖춘 제3자 계측 연구소에 정기적으로 보내 교정을 받는 것이 좋습니다. 권장 교정 주기는 12개월입니다. 사용자는 사용 빈도, 환경 조건 및 품질 시스템 요구 사항을 고려하여 구체적인 교정 주기를 결정할 수 있습니다.

6. 문제 해결 및 일반적인 문제 해결 방법

실패 증상	가능한 원인들	순서
기기가 켜지지 않습니다	The input power supply main power switch on the rear panel is not turned on, or the fuse has blown.	기기 뒷면 전원 코드 소켓에 있는 입력 전원 공급 스위치를 켜십시오. 퓨즈를 확인하고, 끊어졌으면 동일한 정격의 퓨즈로 교체하십시오.
Touchscreen Malfunction After Power-Up	시스템 멈춤, 리본 케이블 느슨함	If the problem persists after restarting, disconnect the power, then follow our instructions to remove the device casing and check whether the touchscreen ribbon cable is loose.
Switch Mode Failure	Incorrect Switch Module Connection	Please verify that the switch type selected on the touchscreen matches the type of switch actually connected.
Pulse Output Abnormality	Switch Mode Error, Parallel Resistance Range Error, DUT Malfunction	Verify that the switch mode selected on the touchscreen matches the switch module that is actually connected; verify that the appropriate parallel resistor setting is used; verify that the DUT operates normally after the switch is turned on.
Unusual Noise When Operating the Switch	Contact oxidation and ablation; DUT voltage and current out of limits	If severe ablation due to oxidation occurs, replace the parts; do not exceed the load capacity under any circumstances.