SU363209A1 - TIME RELAY - Google Patents

Description

one

The invention relates to automation elements.

In the known time relays, the shutter speed in which is controlled smoothly by changing the reference voltage, with a linear change in the reference voltage, the time delay varies nonlinearly. In addition, in the case of a remote control, the regulator must be connected to the relay unit with three wires.

The purpose of the invention is to increase the linearity of the time delay adjustment and simplify the connection point of the remote control.

This is achieved by the fact that the slider of the variable resistor of the voltage divider is connected to its extreme terminal, and the common point of connection of the capacitor and resistor is the C-master circuit through a series-connected diode and the resistor is connected to the midpoint of the voltage divider. connected to the midpoint of the additional voltage divider connected to the same voltage as the first divider.

The drawing shows a schematic diagram of the proposed relay.

The following symbols are used in the diagram: time specifying capacitor 1; fixed time drive resistor 2; resistors 3, 4 voltage divider; input relay 5; output relay 6; diode 7; resistor 8; capacitor 9; switching pulse generator assembled on the transistor 10; the trigger is assembled on transistors 11 and 12; additional divider is assembled on resistors 13 and 14; opening contacts 15 and 16 of the input relay; switching contacts 17 of the output relay. The principle of operation of the relay is as follows.

When applied to the power supply circuit, input relay 5 is triggered, opens its contacts 15 and 16 and capacitor starts charging / through resistor 2. When the voltage on the capacitor reaches the voltage level removed from the divider on resistors 3 and 4, diode 7 will open , a pulse from the generator through diode 7 and capacitors 1 and 9 will pass to the trigger input and overturn it, relay 6 will operate and switch contacts 17. When removed

the supply voltage de-energizes relay 5, discharges capacitor 1 with its contacts, and returns the trigger to the initial state.

The time delay is adjusted by varying the resistance of the resistor 3. For console performance, this resistor is brought to the remote control.

The effect of achieving linearity in adjusting the time delay can be explained on the basis of the following considerations: a curve

dependencies of the voltage of the capacitor /

versus time and curve, the dependences of the voltage across the resistor 3 on the angle of rotation of its slider have the same character, but are shifted along the axis of the function. Connecting the time of the master resistor to the midpoint of the additional divider at the specified connection of the first divider allows the above curves to be combined. The error of nonlinearity does not exceed 0.5%.

Subject invention

A time relay containing the time of the given capacitor, a constant time of setting, and a resistor, voltage divider consisting of

fixed and variable resistors, switching pulse generator, trigger, input and output relays, characterized in that, in order to increase the linearity of the smooth

the time delay adjustment, the slider of the variable resistor of the voltage divider is connected to its extreme terminal, and the common point of connection between the capacitor and the resistor is the master / C-circuit time through successively

a connected diode and a resistor are connected to the midpoint of the voltage divider, while the second pin is the time of the setting resistor connected to the midpoint of the additional voltage divider connected to

same voltage as the first divider.