SU1571730A1 - Dc-to-dc converter - Google Patents

Abstract

The invention relates to electrical engineering and can be used as a source of constant voltage power. The purpose of the invention is to expand the functionality. The converter consists of a series-connected pulse generator 1 and an M-bit counter 2, the output of which is connected to the control inputs of bidirectional electronic switches (DEP) 4, 5. The input of DEP 4 is connected to a constant voltage source 3. The input of DEP 5 is connected to a storage capacitor 8. The power supply circuits of the pulse generator 1, the counter 2, DEP 4, 5 are connected to the buses of an external source of constant voltage. Between these buses is included a capacitor chain of capacitors 6 ₁ - 6 _N , with the capacitor 6 ₁ being in the form of series-connected capacitors 7 ₁ -7 _N. The common connection points of capacitors 6 ₁ -6 _{N are} connected to the outputs of DEP 4, and the common connection points of capacitors 7 ₁ -7 _{N are} connected to the outputs of DEP 5. This design of the device provides, using a certain switching algorithm of DEP 4 and DEP 5, as multiplication mode and the mode of dividing a constant voltage into an integer and a fractional number. 1 il.

Description

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(21) 4453359 / 24-07

(22) 07/01/88

(46) 06/15/90. Bup. R 22 (72) V.I.Kichatov and D.G.Onyshko (53) 621.314.1 (088.8)

(56) USSR Copyright Certificate No. 559345, cl. H 02 M 3/18, 1977.

USSR Author's Certificate No. 1408504, cl. K 02 M 3/07, 1987,

(54) CONSTANT VOLTAGE CONVERTER TO PERMANENT

(57) The invention relates to electrical engineering and can be used.

as a constant voltage power source. The purpose of the invention is to expand the functionality. The converter consists of a series-connected pulse generator 1 and a tn-bit counter 2, the output of which is connected to the control inputs of bidirectional

electronic switches (DEP) 4,5. DEP 4 input is connected to a constant voltage source 3, DEP 5 input is connected to a storage capacitor 8. Power supply circuits of the pulse generator 1, counter 2, DEP 4, 5 are connected to buses of an external constant voltage source. Between these tires there is a capacitor chain of capacitors 6, -6h, and the capacitor 6 is made in the form of series-connected capacitors 7.7. The common connection points of capacitors 6, LB are connected to the outputs of DEP 4, and the common connection points of capacitors are connected to the outputs of DEP 5. The specified device execution provides with the help of a certain switching algorithm of DEP 4 and DEP 5 both the multiplication mode and the dividing mode integer and fractional numbers. 1 il.

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The invention relates to electrical engineering and can be used in power supplies for microelectronic equipment.

The aim of the invention is to expand the functionality.

The drawing shows the functional diagram of the device.

 The device contains a pulse generator 1, the output of which is connected to the input of m-bit counter 2. A constant voltage source 3 is connected to the input of an N-channel bidirectional electronic switch 4 with a hectare of control inputs. (Where m is 1,2,3 ...) connected to the outputs of counter 2 and to N outputs, where the Second electronic switch 5 is also made with N outputs and m control inputs connected to the outputs of counter 2. The capacitor circuit is formed of series-connected capacitors, with the capacitor 64 configuredthe form of series-connected capacitors 7 (- 7N. Common connection points of the respective pairs of capacitors are connected to the outputs of switch 4, and common connection points of the corresponding pairs of capacitors to the outputs of switch 5, to the input of which is connected a storage capacitor 8. Power supply circuits of the generator 1, counter 2, switches 4 and 5 and the free terminals of the first and last capacitors of the capacitor chain are connected to a common bus and to the U5 bus of a second (external) voltage source (not shown).

An electronic switch 5 with a storage capacitor 8 and capacitors form a voltage divider of source 3.

The device works as follows.

The device can operate in the multiplication-voltage-separation modes of source 3 and voltage division of an external source (external network).

To put the device into multiplication-division mode, it is necessary to briefly connect an external source with voltage N to the terminals of the capacitor circuits,, where V1 is the source 3. At that, the generator 1 and the counter 2 begin to work.

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control signals by electronic switches 4 and 5. On the i-th (, N) signal, the inputs of the electronic switch 4 are connected to the corresponding terminals and the voltage source 3 is connected to the i-th capacitor 6, which is charged to the voltage With the arrival of the next pulse from the generator i, the counter 2 switches to the (i + 1) -e state, in accordance with which the electronic switch 4 connects the voltage source 3 to the (iH) -My capacitor 6. As a result, a successive charging is performed q capacitor chains 6. Since Since the capacitors are connected in series, the voltage U is multiplied by N. At the same time, the second electronic switch 5 and the storage capacitor 8 are used to divide the voltage U on the composite capacitor 6 (. After the transients are completed, the external voltage source can be turned off as the generator, the counter and the electronic switches are powered from the multiplied voltage of the source 3, equal to U, 1 N. In this case, the divided voltage of the source 3 is formed on the capacitors 7.

If voltage source 3 is used as a backup, then in the presence of an external network voltage, the device operates in a voltage dividing mode of the external network. In this mode, the voltage source 3 is connected in series with the elements of a capacitive divider using an electronic switch 4 and recharged to a voltage. When the external network is disconnected, the device automatically switches to the autonomous multiplication-voltage multiplication source 3 mode.

Both in the multiplication-division mode and in the division mode of the external network, the electronic switch 5 is used to periodically connect the storage capacitor 8 to the capacitors 7 of the composite capacitor 6 ,. As a result, the voltages on the capacitors 7 are equalized. Since on the capacitor 6, the voltage is Ug / N, a voltage is formed on each of the capacitors 7.

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To obtain a voltage with amplitude U, (r + 1) it is enough to remove the voltage 1 N

From the chain of 1 series-connected capacitors 6 and n capacitors 7.

Thus, the proposed device provides both the formation of a grid of voltages that are multiples of the voltage of the primary source and the formation of voltages equal to the voltage of the primary source multiplied by a fractional factor. In this case, the voltage is multiplied using the minimum number of capacitors of the capacitive storage.

In addition, a decrease in the number of capacitors in a capacitive storage device makes it possible to increase the efficiency of the converter, since the power of the converter depends on their number.

Claims (1)

Invention Formula Constant voltage to constant voltage converter containing the first constant voltage source, the output of which is connected to the input of the first N-channel bidirectional electronic switch, where N-2, made with n control inputs, connected to the corresponding outputs m-bit one counter, the input connected to the output of the pulse generator, and N outputs, a chain Q 5 0 five 0 five 7306 from series-connected capacitors, the common connection point of each pair of which is connected to the corresponding one of the N outputs of the specified bi-directional electronic switch, and a second constant voltage source, to the output terminals of which, one of which is common, the input power supply circuits of the pulse generator are connected, t-bit counter, the first N-channel bidirectional electronic switch, and, respectively, the free conclusions of the first and last capacitors of the specified chain and, differing in that, in order to expand its functionality, a second electronic switch was additionally introduced with a storage capacitor connected to its input, and the first capacitor of the indicated capacitor circuit was made in the form of N series-connected capacitors, the common connection point of each pair of which connected to the corresponding one of the N outputs of the second electronic switch, whose control inputs are connected to the corresponding PT control inputs of the first switch bodies and with the corresponding outputs of the n-bit counter, and its power supply circuit is connected to the corresponding output buses of the second source of constant voltage.