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參數(shù)資料
| 型號： | SF400CE40E |
| 元件分類： | 插座 |
| 英文描述： | RELAY SOCKET |
| 文件頁數(shù)： | 13/13頁 |
| 文件大?。?/td> | 920K |
| 代理商： | SF400CE40E |
The bifilar coil
The principle is to wind on the magnetic circuit of the main coil a second coil shorted on itself. By a proper adaptation of the
internal resistance of this second coil it is possible to find an acceptable equilibrium between surge voltage and reduction of
the opening speed. To be efficient at fast voltage changes, the coupling of two coils must be perfect. This implies embedded
windings. The volume occupied by the second coil reduces the efficiency of the main coil and results in higher coil power
consumption. This method cannot be applied efficiently to products not specifically designed for this purpose.
The resistor (parallel with the coil)
For efficient action, the resistor must be of the same order of magnitude as the coil resistance. A resistor 1.5 times the coil
resistance will limit the surge to 1.5 times the supply voltage. Release time and opening speed are moderately affected. The
major problem is the extra power dissipated.
Semi-conductor devices
The diode
It is the most simple method to totally suppress the surge voltage. It has the major disadvantage of the higher reduction of
contact opening speed. This is due to the total recycling, through the diode, of the energy contained in the coil itself. The
following measurement is performed once again on the same relay. Operation times are given by the upper curve:
- time to start the movement 14ms
- transfer time 5ms
These times are multiplied by a coefficient from 4 to 8.
The lower curve shows the coil current. The increase prior to NO contact opening indicates that the contact spring dissipates
its energy. At the opening time the current becomes constant as a result of practically zero opening speed.
Due to this kind of behavior, this type of suppression must be avoided for power relays. For small relays which have to switch
low currents of less than 0.2 A, degradation of life is not that significant and the method may be acceptable.
Date of issue: 6/00
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相關PDF資料 |
PDF描述 |
|---|---|
| SF402-1F | RELAY SOCKET |
| SF402CE40E | RELAY SOCKET |
| SF50N13 | 78.5 A, 1000 V, SCR |
| SF50Q13 | 78.5 A, 1200 V, SCR |
| SF50D13 | 78.5 A, 200 V, SCR |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| SF400-G | 功能描述:INTELLIGENT SMS SERVER 4PORT RoHS:是 類別:計算機，辦公室 - 元件，配件 >> 集線器，服務器 系列:MultiModem® iSMS 標準包裝:1 系列:MultiConnect™ SE 類型:服務器，串行至以太網(wǎng) 特點:- 尺寸:3.50" L X 2.10" W x 0.98" H（88.9mm x 53.3mm x 24.9mm） 適用于相關產(chǎn)品:- |
| SF400G26 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:1600V 400A |
| SF400J26 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:1600V 400A |
| SF400L26 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:1600V 400A |
| SF400L4B1 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:FLAT PACKAGE THYRISTOR STACK |
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