SU679938A1 - Controllable voltage source utilizing digital control system - Google Patents

Claims (2)

connected to the second input of the executive meter. The drawing shows a block diagram of a controlled voltage source. Controlled voltage source, contains valve converter 1, converter - voltage frequency 2, first element OR 3, reversible counter 4, first multivibrator 5, second element OR 6, null organ 7, rewriter block 8, executive counter 9, trigger 10 , the second multivibrator 11, the distributor 12, the alternating voltage source 13 and the parameter-frequency drivers 14, ... 14 and 15 ... 15. The device operates as follows. The output voltage of the valve converter 1 is generated in the frequency by the converter nsv1preniya - frequency 2. The pulses from the output of the converter 2 are fed to the input of the element OR 3. From the output of the element OR 3, the pulses go to the subtractive input of the reversible counter 4. The pulses from the first multivibrator 5 are fed to the input of the circuit OR 6. From the output of the second element OR 6, the pulses arrive at the second summing input of the reversible counter 4. Thus, if the frequency at the output of the parameter-frequency 15 is equal to the frequency of the first mu The selector 5, in the reversible counter 4 is recorded a constant number, which decreases or increases with a corresponding increase or decrease in the frequency of the parameter-frequency converter 15. The impulse from the output of the null-organ 7 rewrites the rewrite counter 8 into the executive counter 9. Impulse trigger 10 is also transferred from the zero-organ 7, allowing the second multivibrator I to work. The overflow pulse of counter 9 triggers the distributor 12 to produce six pulses at each output, to ignite the valves (not shown) of the valve converter 1, each pulse at the k-th output being shifted relative to the replenishment pulse by K-i J e c where fc is the mains frequency; K - number of output. The second multivibrator 11 is tuned to the ear frequency. where n is the width of the reversing counter 4, is equal to the size of the executive counter 9, the maximum ignition delay of the valve relative to the beginning of the corresponding half-wave of alternating voltage from source 13. The ignition delay time of the valve is smaller and, accordingly, the voltage at the source output is greater, the greater the number in the reversible counter, which ensures the stability of the average value of the output voltage. Connection to the input of the first element OR 3 through parameter-frequency functional converters 14 ... 14 parameters, an increase in which should cause a decrease in voltage, and to the input of an element OR 6 through parameter-frequency functional converters 15 ... 15 - parameters, an increase in which should cause an increase in voltage, allows control of the object poked from the source with the digital controller. The use of the invention, for example, for controlling electrical engineering processes, will allow to fully automate a number of productions in the field of metallurgy, welding, etc., and to obtain an economic effect of up to one million rubles. Claims: Controlled voltage source with digital regulation, containing parameter-frequency converters, valve converter connected to an alternating voltage source and a null-organ to the first input of the rewriting unit, the output of which is connected to the first input of the executive counter, converter input voltage is connected to the output of a valve converter, the inputs of which are connected to the output of an actuating counter through a distributor, characterized in that source reliability, it contains the first and second multivibrators, the first and second elements OR, the trigger and the reversible counter, to the first input of which through the first element OR the output of the voltage converter is frequency and the outputs of one of the parameter-frequency converters, to the second input through the second element OR - the output of the first multivibrator and the outputs of other converters parameter frequency, and to the output - the second input of the rewriter, the first input of which is connected to the first input of the trigger, the output of the execution counter and connected to the second input of the trigger, the output of which through the second multivibrator is connected to the second input of the executive counter. Sources of information taken into account during the examination 1. USSR author's certificate N 372543, cl. G 05 11/26 of 03/03: 73. 2. USSR author's certificate number 484497, cl. G 05 B 11/26 of 25.L.73.