SU1416957A1 - Multiphase pulsed d.c. voltage stabilizer - Google Patents

Abstract

The invention relates to secondary power sources. The purpose of the invention is to improve the reliability and quality of the output voltage of the stabilizer. The goal is achieved by introducing a block 13 of the initial setup into the stabilizer, the output connected to the setup inputs of all bits of the shift register 10 When the power is turned on, the block 13 forms a narrow pulse and sets all bits of the shift register 10 to one, which ensures the launching pulse modulators of all cells 1. At the same time, all N power switches 2 are turned on simultaneously, which ensures a rapid increase in the output voltage, and this in turn reduces the duration of the first pulse from the output of the pulse width pulse modulator 5, the amplitude of the currents of the chokes 4 cells 1 and the next

Description

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output voltage regulation. In addition, all cells 1 at this moment are under the same conditions and therefore the amplitudes of the currents of their chokes A are the same. This eliminates

difference between the currents of the chokes of 4 cells 1

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at start-up, the magnitude of the current inrush decreases and the stabilizer's output to the operating mode is accelerated. Reducing current overloads at start-up reduces the probability of stabilizer failure And increases its reliability. 2 Il.

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The invention relates to electrical engineering and can be used to create stabilized pulsed sources of secondary DC power supply.

The purpose of the invention is to increase the reliability and quality of the output voltage.

Fig. 1 shows a structural diagram of a multiphase w pulsed DC voltage regulator; Fig. 2 shows diagrams of the current of the choke and of the output voltage at start-up.

The stabilizer contains N identical converter cells 1, the power inputs and outputs of which are connected in parallel, each cell includes a power switch 2, one output of which is connected to the input of cell 1 and the input terminal of the stabilizer, and the other through diode 3 cells 1, a pulse-width modulator 5, an output connected to the control input of the power switch 2, control inputs of the pulse-width modulators 5 are combined, a smoothing filter 6 connected between the outputs of the cells 1 and the output terminal 7 7 stabil the amplifier, feedback amplifier 8, the inputs connected to the output terminal 7 of the stabilizer and the source 9 of the reference voltage, the N-bit shift register 10, the outputs of which are connected to the clock inputs of the pulse-width modulators 5, which sets the generator 11, the output connected to the clock input of the shift register 10 and the frequency divider 12 times the output of which is connected to the information input of the shift register 10, the unit 13 of the initial installation, containing, for example, a capacitor 14 connected in series and a resistor

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15, connected to the input of the stabilizer, the output of the setup block is connected to the installation inputs of all bits of the shift register 10.

The device works as follows:

When the supply voltage is applied, the master oscillator 11 and the frequency divider 12 start working, the output pulses of which are fed to the inputs of the shift register 10, a short-term voltage pulse on the resistor 15 created by the charging current of the capacitor 14 of the initial setting unit 13 at the moment of applying the power supply, setting all bits of the shift register 10 to state 1, with a signal appearing on all outputs of this register, initiating the operation of the spurious modulators 5 of all cells 1, simultaneously opening all power switches 2 and current from the power source flows into the smoothing filter capacitor 6 and the load connected to the output terminal 7, ensuring a rapid increase in the output voltage. When the surge voltage reaches a value commensurate with the magnitude of the reference voltage from source 9, and the difference between these voltages, amplified by feedback amplifier 8, triggers the trigger pulse modulators 5, the power switches 2 turn off and the choke current closes diodes of 3 cells 1. Next, the work of the cells begins alternately, similar to that in multiphase pulse stabilizers. “Since at this moment the reactive elements of the stabilizer have already accumulated some energy, the process goes without major current surges and overvoltages

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Figure 2 shows plots of the throttle current and the output voltage when the device is started up, for comparison; The dotted line shows diagrams for the known device.

The technical and economic efficiency of the device is determined by its higher reliability due to the simplification of the working conditions of the stabilizer power elements at start-up. This makes it possible to reduce the reserves by their installed capacity, which reduces the weight and dimensions of the stabilizer.

Claims (1)

Invention Formula A multiphase DC pulse voltage regulator containing N identical converter cells, the power inputs and inputs of which are connected in parallel and connected between the input and output terminals, each cell including a power switch, one output of which is connected to the cell input, the other through the diode and choke are connected to the cell output, and the pulse-width 574 modulator, the output connected to the control input of the power switch, the control inputs of the pulse-width modulators are combined, smoothing the filter connected in parallel to the output pin, the feedback amplifier, the inputs connected to the output pins of the stabilizer and the voltage source, the output of the feedback amplifier is connected to the control-. Lueing inputs of pulse-width modulators of converter cells, a shift register, whose outputs are connected to the clock inputs of pulse-width modulators, a master oscillator, the output of which is connected to the clock input of the shift register and frequency divider N times, the output of the frequency divider is N times connected to the information input of the shift register, characterized in that, in order to increase the reliability and quality of the output voltage, it entered the block setup, the output of which is connected to the installation inputs of all bits of the shift register ,, cpue.Z