SU617733A1 - Dc voltage automatic compensator - Google Patents

Description

one

The proposed constant voltage compensator can be used in devices for measuring equipment and automation and in information and measuring systems.

A known DC voltage compensator is known, which contains input terminals, a capacitor and an AC voltage amplifier, to the output of which an executive motor is connected, connected to a compensating converter 1. The disadvantages of the known compensator are low measurement accuracy and large dimensions.

The purpose of the invention is to improve the accuracy and reduce the size of the device. The goal is achieved by introducing a resistive comparison circuit, two key devices, and a suppressor, whose output is connected to the control inputs of the key devices, with a capacitor connected between the first and second key devices parallel to the compensator, the output of one of the comparison circuit resistors connected to one of the input terminals, the second output of the same resistor is connected to one output of the second resistor of the comparison circuit and the input of the first key device, and the second output of the second resistor but

the comparison circuit is connected to the output of the compensating converter, while the inputs of the amplifier limiter and the compensating converter are connected to

power source. A linear rotary transformer is used as a compensating converter.

The drawing shows a diagram of the proposed compensator.

It contains input terminals 1, a resistive comparison circuit 2, formed by resistors 3 and 4, serially connected key devices 5 and 6, a meladu by which (parallel to them) a de-energizer 7 is connected, a successively connected AC amplifier 8, an executive motor 9 and a compensating converter 10 and the limiting amplifier 11. One of the Zalesimov 1 is connected

with a resistor 3. The connection point of resistors 3 and 4 is connected to the input of the key device 5. The output of the key device 6 is connected to the input of the amplifier 8. The second end of the resistor 4 is connected to the output of the compensating converter 10, the input of which and the input of the limiting amplifier 11 are connected to the source nutrition The output of the amplifier-limiter AND connected to the control inputs of key devices

Claims (2)

5 and 6. When applying "DC input voltage terminals" on the resistors 3 and 4, the currents due to the output voltage Ux and the compensating UK voltage are compared. The latter is a sinusoidal voltage, the magnitude of which is proportional to the output signal — the angle of rotation a. With the help of the limiting amplifier, the keys are alternately closed and opened, and for a time equal to half the period of the supply voltage t / n. The closing and opening moments correspond to the moments when this voltage passes through zero. Moreover, the serial and parallel keys of the key devices 5 and 6, respectively, are simultaneously closed (open). P | 1 and a positive polarity Ux the serial key of the device 5 is closed for the time of the negative half-wave of the U-K voltage line (parallel - open) and the capacitor 7 is connected to the resistive comparison circuit 2. In this half-period, the serial key of the device 6 is open and the parallel key is closed. The capacitor 7 is used to isolate the DC component of the voltage due to the difference in the DC components of the comparison circuit. In the next half-period, the capacitor 7 is disconnected from the comparison circuit and connected with the serial key of the device 6 to the input of the amplifier 8, and the common point of the resistors 3 and 4 is connected to the common point of the circuit. By periodically closing the keys of the device 6, the constant component on the capacitor 7 is converted into a variable component, which, when amplified by the amplifier 8, rotates the rotor of the actuator 9. At the same time, the output value a changes until the output signal UK of the compensating converter balances input signal Ux. As a result, the residual component on the capacitor 7 will become zero and the engine will stop. Moreover, the rotation angle a will be proportional to the measured voltage Ux.The proposed design of the automatic constant voltage compensator allows to increase the measurement accuracy and reduce the size of the device due to the use of a resistive comparison circuit, key devices and a compact non-contact compensating converter, which is a linear rotary transformer. Claim 1. An automatic DC compensator containing input terminals, a capacitor and an AC voltage amplifier, to the output of which an executive motor connected to a compensating converter is connected, characterized in that, in order to increase the accuracy of measurement and reduction of dimensions, into it a resistive comparison circuit, two key devices and an amplifier-limiter, the output of which is connected to the control inputs of the key devices, and between the first and second key A capacitor is connected in parallel with them, the output of one of the comparison circuit resistors is connected to one of the input terminals, the second OUTPUT of the same resistor is connected to one output of the second reference circuit resistor and the input of the first key device, and the second output of the second reference circuit resistor is connected to the output of the compensating converter , while the inputs of the amplifier limiter and the compensating converter are connected to a power source. 2. The compensator for and. 1, characterized in that a linear rotary transformer is used as a compensating converter. Sources of information taken into account during the examination 1. USSR Author's Certificate No. 188580, cl. G 01R 17/06, 1965. 5es- Vn