SU664280A1 - Single-relay counting cell - Google Patents

Description

(54) ONE-RELAY COUNTRY CELL

The invention relates to counting devices, to a pulse technique, and can be widely used in control systems of various production processes, for example, when constructing a processing sprsch counter between the changes of the grinding wheel of a grinding machine, after a specified number of processing cycles, the counter issues a command to stop grinding, diamond grinding wheel and grinding wheel.

Single-relay counting cells are known, comprising a relay, a non-capacitor capacitor, a power source and ballasts resistors ij.

The disadvantage of such a single-relay counting cell is the low permissible output pulse frequency and insufficient reliability of operation caused by the spread of release currents of the used relays.

The closest to the technical nature of the invention is monorails

to a counter cell containing a relay and a non-polar capacitor, a power source containing two half-wave rectifiers, the output of the first of which is through the first ballast resistor, the relay contacts closing and the closing control contacts are connected to the first plate of the non-polar capacitor, the second and third ballast resistors, capacitor filter diodes 2.

The purpose of the invention is to simplify and increase the reliability of the device.

This is achieved by the fact that in a mono-relay, counting cell containing a relay and a Kepol capacitor, a power source containing two half-wavelength 1x outlets, the output of the first of which through the first ballast resistor, the closing contacts of the relay and the closing control contacts is connected to the first plate not full condenser, the second third ballast. resistors, a diode to a capacitive filter, the first single-semiconductor detector, a second ballast resistor, MbiKaidiltiic. contacts - through a capacitive filter with the output of the first one-half-permolde artifler. The drawing shows the principle of electrical power; device diagram, Into its power supply source, built on two half-wave rectifiers x- 1 and 2, ballast TerritoryStools 3, 4, 5, non-polar capacitor 6 7 with make contacts 8, 9 and pull contacts 10, locking 11 and opening 12 L contacts, a diode 13 and a capacitive filter 14. The closing control contacts 11 are prepared to form the discharge circuit of the capacitor 6 on the coil of the relay 7 with a series-connected diode 13. From rectifier 1, the ball elliptic resistor 3 and the closing contacts 8 пЫ1) гтт6Твлё1 and 1 W 1§Eot1i Thani relay. Capacitor charge voltage 6 for reverse polarity from one half wavelength single diode power 2 through the ballast resistor 5 and controlling the control pins; 12 prepared by relay contacts 9. A capacitor charged to the reverse half of the capacitor b to a half-wave rectifier 1 and a parallell coil the relay 7. 7.-o: -; --- - - Proposed counting cell works as follows,; The original connection is shown in the drawing. From the source - an alternating voltage through a half-wave rectifier with a capacitive filter 14, the capacitor 6 is charged so that on its left lining the Po is a plus, and on the right lining - a minus. Condenser 6 charge circuit: plus source (rectifier 1) resistor 4 - open contact 10 relays - disconnecting control contact 12 - capacitor - minus

Claims (2)

- -V-; S4 "i;.; (I 6G42SO of the source (controller 2) of alternating voltage. When the first input pulse is applied, the dry contact 11 closes, and the return contact 12 opens. Capacitor 5 is discharged to the winding p; SienottinKf plus-capacitor 6 pps contact 11 - winding relay 7 - diode 13 - capacitor 6. When the operating current reaches the relay 7, then the closing contacts 8 of the relay set the relay 7 to self-feed through the circuit: source plus (rectify: 1) - resistor 3 - contacts 8 relays - relay winding 7 - diode 13 - minus sinusoidal voltage source; release contacts 10 of the relay are opened, breaking the former charge circuit of the capacitor 6 from rectifier 1; the closing contacts 9 of the relay are closed, by preparing the charge circuit of the capacitor 6 from the slider 2. After the first input impulse stops supplying, the control contacts 11 and 12 return to the initial state, i.e. pin 11 is open and pin 12 is closed, but the relay remains on. In this case, the capacitor 6 is again switched on to the source voltage saWb BK "-v - - i" i -----, but is charged with reverse polarity along the following charge circuit: plus source - capacitor 6 - contact 12 contact 9 relay - resistor 5 is rectifier 2 - minus of the source of alternating voltage. Now, capacitor 6 is charged so that minus appears on its left face, and plus 5 on the right face. When the second input pulse is applied, the terminals 11 and 12 switch again; pins 11 are fading, and pins 12 are fading. At the same time, the minus of the cover of the capacitor 6 is connected to the positive of rectifier 1 by winding the relay 7 through the closed contacts 8 of the relay, the braking control contacts 11 and the resistor 3, and the plus of the capacitor 6 with the minus of the sinusoidal voltage source. Connecting the charged capacitor 6 to a source of direct current of reverse polarity and parallel to the coil of the relay 7 causes a discharge of the capacitor 6, a rapid drop in the current in the coil and the relay disconnecting. Diode 13 locks the capacitor discharge current circuit 6 on katuzu relay 7 and prevents the turnips from turning on again when the relay has fallen off, contacts 8 are already open, contacts 11 are still closed, and on capacitor 3 remains behind the same polarity {on the left side of the ke is minus, and on the right is the plus), since during the time of current decrease in the coil to the magnitude of the release current of the relay, the capacitor 6 does not have time to discharge. At the end of the second pulse, the control contacts 11 are opened, and the contacts 12 are closed. Even if the charge of the former polarity remained on the capacitor b, then the circuit - expander 1 resistor 4 - contacts 1O - contacts 12 - capacitor 6 - capacitor recharges and the circuit returns to its initial state. The advantages of the proposed single-relay counting cell of a binary counting over the known ones are that instead of the 9-contact groups in the known, the proposed cell has 5 contact groups; in addition, the possibility of the relay being switched on again and the malfunction of the counter cell from the partial capacitor discharge current circuit to the relay winding during the period of the core failure is excluded. This allows the capacitor capacitance to be selected only according to the condition that the relay is reliably activated by the first pulse. The condition of resetting the relay from the second pulse is provided absolutely reliably. Compared with the known relay shunting circuit of a discharged capacitor, the proposed circuit almost completely eliminates the dependence of the reliability of the counter cell on the variation of the release currents of the relay. At the same time, the eiMKOCTb of the capacitor is reduced, which allows an increase in the admissible frequency of the output pulses. Claims of the invention A single-relay counting cell containing a relay and a non-capacitor capacitor, a power source containing two half-wavelength transmitters. The output of the first through which the first bplastic resistor, the closing relay contacts and the closing control contacts is connected to the first plate of the non-polar capacitor, the second and third ballast, resistors, a diode and a capacitance filter, so that, in order to simplify and expand reliability, the first single-halfdistr mtr. through the second ballast resistor, the opening contacts of the relay and the softening contacts are connected to the first plate of the non-polar capacitor, the second one half-half terminal is connected via the third ballast resistor and the relay contacts is connected to the disconnecting control contact, the anode of the diode is connected through the relay coil, with the KOHTaKTaKtH controllers, and the capacitor filter cathode through the output of the first half-wave edge of the miter. Sources of information taken into account in the examination 1. Yu. N. Ivensky et al. Electroautomat Sha machine lines, Mashinostroershe, 1964, p. 245-25O. 2. USSR Author's Certificate No. 1О3893, cl. N OZ K 21/16, 1956.   TV -i 664280