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參數(shù)資料
| 型號： | IR2137 |
| 廠商： | International Rectifier |
| 英文描述： | IGBT Protection in AC or BLDC Motor Drives |
| 中文描述： | IGBT的保護(hù)在交流或直流無刷電機(jī)驅(qū)動器 |
| 文件頁數(shù)： | 3/9頁 |
| 文件大?。?/td> | 86K |
| 代理商： | IR2137 |
www.irf.com
3
2-3 Traditional Methods of Over-Current Shutdown
For shutting down an IGBT when an Over-Current condition is detected, a soft turn-off is preferred
because it reduces a high voltage spike across the collector and emitter of the IGBT device at fault.
Thus it provides a wider margin for the RBSOA limit during a short-circuit condition, allowing the
snubber circuit to be significantly minimized or even eliminated. When implemented in the discrete
circuit based on the floating ground reference architecture, a soft turn-off circuit can get very com-
plex. Each IGBT gate drive circuit requires an additional fast opto isolator and soft turn-off circuit with
the dedicated totem pole buffer transistors. Given circuit costs and complexities, a snubber circuit is
preferred to the discrete soft shutdown circuit. For low Hp devices, the snubber circuit can be imple-
mented with a high frequency type capacitor across the DC bus, near the IGBTs.
2-4 Problems with the Traditional Method
A. Circuit Control Problems
In a soft shutdown scheme, simultaneous shutdown of all 6 IGBTs is required to prevent a potential
false turn-on while the IGBTs are in the soft shutdown mode. If a high side IGBT is turned off softly
while the other IGBTs are in the middle of a switching transition within a PWM period, that IGBT can
unintentionally be turned back on. It is extremely difficult to synchronize simultaneous shutdown
using traditional architecture.
B. Part Count, Size, and Cost Problems
If the system requires full IGBT protection, including Ground Fault protection, and if it is based on the
floating ground reference architecture, then the gate drive and protection circuit require the following
major components (even without the soft shutdown feature):
6 fast opto isolators
2 fast Hall Effect sensors or fast linear opto isolators
2 comparators
4 floating 15V power supplies
Hall Effect sensors and opto isolators are relatively large and bulky, and require a lot more space
than a monolithic IC. In addition, if the system requires a soft shutdown function, 6 additional opto
isolators and 6 buffer circuits (with a provision for soft turn off capability) are required. Thus, whereas
low Hp AC drive systems are today moving toward smaller sizes, the above solutions provide neither
the simplicity nor the integration of the gate drive and protection circuitry that is needed.
The total cost, including assembly of the inverter system, is large due to the large number and
bulkiness of components. Furthermore, components such as the Hall Effect sensors are still subject
to manual assembly.
To circumvent these issues, a small, integrated IC device that is capable of performing all the above
functions is a necessity.
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| IR22381QPBF | 3-PHASE AC MOTOR CONTROLLER IC |
| IR2152 | SELF-OSCILLATING HALF-BRIDGE DRIVER |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| IR2137IGBT | 制造商:IRF 制造商全稱:International Rectifier 功能描述:IGBT Protection in AC or BLDC Motor Drives |
| IR2137J | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:AC Motor Controller/Driver |
| IR2137Q | 制造商:INTRSL 功能描述: |
| IR21381Q | 制造商:IRF 制造商全稱:International Rectifier 功能描述:3-PHASE AC MOTOR CONTROLLER IC |
| IR21381QPBF | 功能描述:IC CTLR AC MOTOR 3PHASE 64-MQFP RoHS:是 類別:集成電路 (IC) >> PMIC - MOSFET，電橋驅(qū)動器 - 外部開關(guān) 系列:- 標(biāo)準(zhǔn)包裝:50 系列:- 配置:高端 輸入類型:非反相 延遲時間:200ns 電流 - 峰:250mA 配置數(shù):1 輸出數(shù):1 高端電壓 - 最大（自引導(dǎo)啟動）:600V 電源電壓:12 V ~ 20 V 工作溫度:-40°C ~ 125°C 安裝類型:通孔 封裝/外殼:8-DIP（0.300"，7.62mm） 供應(yīng)商設(shè)備封裝:8-DIP 包裝:管件 其它名稱:*IR2127 |
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