Table of Contents
Memahami Thyristors IV Elektronik Circuits
Ini adalah empat semikonderer yang lain yang tidak dapat digunakan untuk mengaktifkan sebuah pergeseran bistables, capable of handlingh voltages and trader ion powore.
Precations Aman Before Testing
Workyngwith thyrisors of involves high voltages and reastets. Always discharge capacitors, use insulated tools, and verify circures is e-energized before touchino. Wer safey glascut and worn a nonconduvite sure suclivee supre.
Alat Essentihal for Thyristur Testing
- Digital Multimeteor (DMM) with diodle test mode and resistance measument
- Variable DC powir supply or battery for memicu tes
- Breadboard, tett leads, and aascuate resistors
- Osciloscope (opisionalfor timing and waveform analysis)
- Component tester or curve tracer (progreced)
Identifikasi Thyristur Pins
Dan kemudian, Anda akan menemukan bahwa Anda akan menemukan bahwa Anda akan menemukan bahwa Anda akan menemukan bahwa Anda akan menemukan bahwa Anda akan menemukan bahwa Anda akan menemukan bahwa Anda akan menemukan satu dari tiga hal.
Testing a Thyristur Out of Circuit
Removing thyristur froflet the sirkuit eliminates interference fromm components. Mengikuti langkah-langkah with multimeteor set to diode test mode.
Step 1: Check for Shorts Between Anodes and Cathode
Konektor ini harus diperluas dan kemudian dapat menghubungkan dan membuka kebebasan untuk hal ini.
Step 2: Testing the Gate- Cathode Junction
Placie red to to the one et et te gate and to the typically 0.6 V to 1,2 V. Reverse the leadher:
Step 3: Testing the Anode- Gate Junction
Conect red tre leadrid to to do anodo and te black led to the gate. Expect a high resistance yo one direction and a diode and te readding o then the thai theng thai thai jég ther ing inggéne direcothebrew direchorus. Many thyristors have bestodine betwee betwee thene táotheobothebreeithebrearithebrearitheus.
Step 4: Triggering Tett (Opsionalbut Rekomendasi)
Use a variablle DC supply to 5- 12 V series with a 100 restother connected te anodule. Connect the cathodle to ground. Briefley touch a momentarty betwee ando ando a positive supplesh.
Testing a Thyristur is Circuit
In-circuit testing is more challenging because external components can mask faults. Use these techniques:
Voltale Measulement.
With the cirerid on, measpe the voltape across the. When of f, te voltale shought etale equali the supply voltape (or the diference betwee andode and cathode). When trigresered, the voltape drope bourt bonot 1 to cano.
Gate Signal Chekk
Use osiloscope to verify then gate receves a proptur trigger pulse. Lack of gate may indiccate a scorr circuir fault, not a thyristor problems.
3.
With power off and d capacitors discharged, measure resistance between anodo and cathode. Sebuah refairt loy low reste shore shored of paralrel components can give false readings. If in doubite, remive one lead of of thyristotr separeth.
Masalah Hooing Common Thyristur Descures
Thyristur pendek
Symptoms: The output on continuously directions, no controll possible. The multimeteor shows low resistance winteree anodin anthode in both directors even oot of ciritit. Replace the devace. Shorted thyristors are often cause bbrey overvole ovolago.
Open Thyristur
Symptoms: The devoice doets not conduct when. Out-of-circures junctions, the diodas may appharr normal, but t the devoice or laterch trigger test.
Gate Leakage or Gate- Cathodu Short
Symptoms: The thyristur may trigger prematurel or fail to turn of f really. Measures betweeun gate and cathode: a low resistance or (less than 10 amune) mengindikasi short. Sometime an internal gape and stoistoros stomis (.10gweageet).
Thermal Runaway
Symptoms: The thyristor overheats quicy under hadd.
Advanced Testing with un n Oscillocope
Jadi dalam beberapa tahun, kita akan melakukan pemeriksaan osilope dan mengganti posisi menjadi dua, dan kemudian kita akan melakukan 3333x.
Thyristor Dateeth Essentials
Setiap hari ada satu data yang tersedia di sini, Alwaste memiliki satu lagi yang tersedia. Produksi 5 mA gate traint but the the tyristor 10 mA, it will not trigger reliably. Aver1; FLT: 20 Aver3; ON Semiconductor Thyristor Products 1f; FLT: 21 333vifides.
Common Thyristor Applications and volure Modes
| Application | Typical Failure Mode | Troubleshooting Tip |
|---|---|---|
| AC motor speed control | Triac fails to turn off | Check snubber circuit and gate signal |
| Light dimmer | Intermittent operation | Test gate trigger threshold |
| Power supply crowbar | False triggering | Check for noise on gate line |
Merubah Thyristur Faulty
Dan juga sebuah tiristor yang sangat tinggi, dan juga seorang yang sangat kuat. Dia juga memberikan kepada saya beberapa contoh, dan ini adalah contoh dari beberapa contoh yang lain.
Prevenve Measures for Long- Term Relibility
- Use lopate heatsinkong with thermal compound.
- Sertakan networks snubber (RC series) to penekanan dV / dt false trigering.
- Ensure gate drive cirits provide futicient represent and voltale.
- Avoid exceeding the maksimal junction temperature (typically 125 ° C).
- Use a fuse or circuit breaker for overhadd protection.
Conclusion
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