SU1698974A1 - Ac key - Google Patents

Abstract

The invention relates to a pulse technique and can be used for contactless noiseless switching of a power circuit. The purpose of the invention is to increase reliability of operation. The AC key contains a triac 1, a load 2, terminals 3. 4 networks, a diode bridge 5, a parallel circuit from a resistor 6 and a capacitor 7, a control key 8, terminals 9, 10 of the control source Introduction And 12, which are connected in anti-parallel between the input terminal of the diode bridge 5 and the cathode of the triac 1, and the execution of the controlled key 8B in the form of a thyristor oscillator reduces the number of elements under the network voltage and reduces the rate of increase on prints on shimisyur. 1 il.

Description

Isobrek1i50 refers to a pulse technique can be used for contactless noiseless switching

ui / chain chain

The purpose of the invention is to increase the reliability

operation by reducing the number of elements under the supply voltage and reducing the speed and voltage of the voltage on the memory;

The drawing shows the principle of the electrical circuit device,

The alternating current key contains a shmi-crop i, connected in series with a force of 2 between terminals 3, 4 of the diode bridge B supplying the switch, the first input terminal of which through a parallel circuit of the resistor b and capacitor 7 is connected to the anode simistoz 1 and the second input the lead is connected to the control electrode; i-yutoro 1. G, the output diagonal of the site is 5 wk;: u “en the phototristor of the optron 8. The PDL is connected to the terminals

910 of the control voltage source, a cHMi connection iCiOoa H is connected to the first input pins of the location 5 through counter-parallel connected drivers 11, 12,

The device-cho ooo-ag as follows.

the oic-CTBi / ie voltage at terminals 9,

10th voltage eata pretends to the covered shimsgoru capacitor 7

; t diNestoram P, 1L

K-IK only .dikistorau reached-u t- (5 V, in the circuit 11 ° 12–12 (depending on half-capacity / eg 4 cs), ecl1c en, nrp liar, nn 12 through it to charge Condoieur 7, which is located in / near the longest, will be practically under the mains voltage. Thus, the DIN 11,12 are closed only at the beginning of the half periods, the voltage on them does not exceed 1V 8, with the rest of the time they are open and they shunt the entrance of the bridge 5 together with the control transistor of the triac 1, therefore, when voltage is applied to the terminals 9, 10, the phototransistor of the optocoupler 8 is turned on and, accordingly, the Smistor 1 can only occur at the beginning of the half-period network voltage, when both the detector switches 11, 12 are closed.

Claims (1)

The increased reliability of operation of the device is due to the fact that the voltage on the phototransistor of the optocoupler 8 does not exceed 15 V, and under the voltage of the network there are only 1 chassis and a capacitor that provides not only the triac 1 but s. its protection against the dv / dt effect, claims of the invention AC key containing a triac connected in series with the load between the mains supply terminals, a diode bridge, the first input terminal of which is connected to the triac anode through a parallel circuit. The second input terminal is connected to the triac control electrode,. A driven key that closes the output diagonal of the diode bridge and connected by its input to the terminals of the control voltage source, which differs, "in order to increase the reliability of operation, two dynodors are inserted, which are connected in parallel to the first input terminal of the diode bridge and the triac cathode, and the control key, P, is made in the form of a thyristor optocoupler.