The character of silicon controlled rectifier and detect

The character of silicon controlled rectifier. Silicon controlled rectifier divides one-way silicon controlled rectifier, two-way silicon controlled rectifier. One-way silicon controlled rectifier has G3 of K of zincous A, cathode, control pole derivative foot. Two-way silicon controlled rectifier has the first zincous A1 (T1) , the 2nd zincous A2 (T2) , control pole G3 derivative foot. Should add between A of positive pole of one-way silicon controlled rectifier and cathode K only have to voltage, place adds to need between control pole G and cathode at the same time to when touching hair voltage, just can be sparked to guide. Low block is presented between A, K right now on-state, press between zincous A and cathode K fall make an appointment with 1V. One-way silicon controlled rectifier guides after connecting, although controller G is lost touch hair voltage, still should maintain between zincous A and cathode K only to voltage, one-way silicon controlled rectifier continues to be in low block on-state. Demolish zincous A voltage only or polarity of the voltage between K of zincous A, cathode produces a change (had communicated 0) when, one-way silicon controlled rectifier just by low block on-state changeover is tall block off-state. Once one-way silicon controlled rectifier ends, although zincous A is mixed,add afresh again between cathode K to voltage, still need to be being controlled have between G and cathode K extremely add afresh to touch hair voltage to just can guide. Of one-way silicon controlled rectifier guide connect what be equivalent to switch with off-state to close with disconnect condition, can make with it without contact switch. Two-way silicon controlled rectifier between the first zincous A1 and A2 of the 2nd positive pole, no matter what add voltage polarity,be to retrorse still, should add between control pole G and A1 of the first positive pole only what losing polarity to differ touch hair voltage, can spark guide assume low block position. Press between A1, A2 right now fall to also be 1V about. Once two-way silicon controlled rectifier guides, although lose,touch hair voltage, also can continue to maintain on-state. When the first zincous A1, the 2nd positive pole only A2 electric current is reduced, be less than holding current or change when voltage polarity between A1, A2 and when touching hair voltage, two-way silicon controlled rectifier just is cut off, add afresh only right now touch hair voltage to just can guide. 2.

Of one-way silicon controlled rectifier detect. Avometer chooses resistor R*1 Ω to block, with red, black two watches pen measures random respectively two one pair when bring the positive and negative between the foot to till find out reading,be tens of ohm to resistor cites a base, right now of black list pen bring a foot to be control pole G, of red watch pen bring a foot to be cathode K, another empty foot is zincous A. Right now pen of will black list receives the zincous A that already judged, red watch pen still receives cathode K. Right now avometer finger should be not moved. With short line instantaneous weak point accepts zincous A and control extremely G, right now avometer report holds back pressing with a finger to answer right deflexion, block is worth reading to be controlled for 10 ohm. If zincous A receives black list pen, when cathode K receives red watch pen, avometer finger produces deflexion, explain this are one-way silicon controlled rectifier already puncture attaint. 3.

Of two-way silicon controlled rectifier detect. Block with Ω of avometer resistor R*1, with red, black two watches pen measures random respectively two bring the positive and negative between the foot to resistor, result among them two groups of reading are infinity. When be like a group to be tens of ohm, what this groups of red, black lists receive two bring a foot to be mixed for the first zincous A1 control pole G, another empty foot is the 2nd zincous A2 namely. After affirmatory A1, G pole, measure A1, G pole again carefully, retrorse resistor, the black place expressing a pen that reading measures that relatively lesserly receives bring a foot to be the first zincous A1, the red place that express a pen guides a foot to be control pole G. black list the pen receives affirmatory already the 2nd zincous A2, red watch pen receives the first zincous A1, right now avometer finger should not produce deflexion, block value is infinity. Reoccupy short wiring A2, G pole instantaneous weak point is received, give G pole to be added to touch hair voltage, the block between A2, A1 is worth about 10 ohm to control. Disconnect subsequently between A2, G short wiring, avometer reading should maintain 10 ohm to control. Crossing-over is red, black the wiring that express a pen, red watch pen receives the 2nd zincous A2, black list pen receives the first zincous A1. Same avometer finger should not produce deflexion, block value is infinity. With short wiring A2, G pole again instantaneous weak point is received, give G pole to add those who lose to touch hair voltage, the block value between A1, A2 also is 10 ohm left and right sides. Disconnect subsequently between A2, G pole short wiring, avometer reading should changeless, maintain control in 10 ohm. Accord with above rule, the specification is measured two-way silicon controlled rectifier did not damage and 3 polarity that cite a base are judicious. Detect relatively when high-power silicon controlled rectifier, need is strung together in avometer black pen receive 1.

5V dry cell, touch hair voltage in order to rise. Brilliant brake is in charge of (silicon controlled rectifier) the differentiate of pin of canal of brake of pin differentiate brilliant can use undermentioned method: Block with avometer R*1K first measure the block value between 3 feet, block is worth small bipod to be control pole and cathode respectively, the one foot of place remnant is positive pole. Block avometer park R*10K again, hold with finger positive pole and another foot, and do not let bipod contact, black list pen receives positive pole, red watch pen receives the one residue that leave, if express a needle to swing right, place of pen of demonstrative red watch is received for cathode, do not swing to be control pole CNC Milling