Adjustable decreasing transformer of direct voltage

FIELD: transforming equipment engineering, possible use in electric power sources.

SUBSTANCE: adjustable decreasing transformer of direct voltage contains input, output and common clamps for connection of, respectively, source of direct voltage and load, n chains connected by their first outputs to common clamp 25. Each chain consists of serially connected discharge diode 1, capacitor 2 and controllable discharge key 3. transformer also contains (n-1) discharge diodes 4, each of which is enabled between differently named outputs of capacitors of appropriate adjacent chains, controllable charge key 5, enabled between input clamp and discharge bus 6, controllable adjusting elements 7-11, each of which is connected in parallel to discharge diode 4 of appropriate chain and two groups of commutation elements, while each commutation element of first group 12-17 is enabled in parallel to discharge key 3 of appropriate chain, while each commutation element of second group 18-23 is enabled between discharge bus 6 and common point of connection 24 of capacitor 2 and discharge key 3 of appropriate circuit. Introduced into transformer are n groups of m commutation elements and (m-1) output clamps for connecting additional loads.

EFFECT: extended functional capabilities due to provision of operation of device for several loads with varying output voltages; significantly improved mass-dimensional characteristics.

1 dwg

 

The present invention relates to the field of converting equipment and can be used in the source and the secondary power supply.

Known adjustable step-down Converter DC voltage containing n chains, each of which consists of series-connected bit key, capacitor and discharge diode, (n-1) of which are connected in parallel and connected to the output pins, (n-1) charging diode connected between the opposite terminals of the capacitors of adjacent chains, as well as the charging key is included between the first capacitor chain and the input and output regulating transistor connected between the bit last diode chain and the output pin of the Converter (A.S. No. 987758, USSR, H 02 M 3/335).

This Converter has a wide range of output voltage regulation. However, its efficiency is relatively low, due to power loss on the active resistance of the regulating transistor. Another disadvantage of this Converter is its ability to work for only one load.

In addition, the known adjustable step-down Converter constant voltage, which is the prototype of the present invention and contains the input, output and common terminals for connecting the COO is responsible constant voltage source and the load, n is connected to its first output to the total output of the Converter chains, each of which consists of series-connected discharge diode, capacitor and bit key, (n-1) charging diodes, each of which is connected between the opposite terminals of the respective capacitors of adjacent chains, managed charging key, included between the input and output charging bus, managed regulatory elements, each of which is enabled bit parallel diode of the respective chain and two groups of switching elements, each switching element of the first group are connected in parallel bit key of the respective chain, and each switching element of the second group connected between a charging bus and a common connection point of the capacitor and bit key of the respective chain.

However, this device is capable of working only on one load, which significantly reduces its functionality.

The elimination of this disadvantage by using a separate Converter for each of the load leads to a significant deterioration of the mass and size parameters.

The task of the invention is to enhance the functionality of the transducer by providing his work on multiple loads with different output n is pagename and improvement of its mass and size parameters.

This object is achieved in that in the regulated step-down Converter comprising input, output and common terminals for connection, respectively, of the DC voltage source and a load, n is connected to its first output to the total output of the Converter chains, each of which consists of series-connected discharge diode, capacitor and managed bit key, (n-1) charging diodes, each of which is connected between the opposite terminals of the respective capacitors of adjacent chains, managed charging key, included between the input and output charging bus, managed regulatory elements, each of which is enabled bit parallel diode of the respective chain and two groups of switching elements, each switching element of the first group are connected in parallel bit key of the respective chain, each switching element of the second group included between the battery bus and a common connection point of the capacitor and bit key of the respective chain, entered n groups of the m switching elements and (m-1) output pins for connecting additional loads, and in each group the first conclusions of the switching elements are connected to each other and the second output of the respective chain, and their second in the water connected to respective output pins of the Converter.

The drawing shows a structural diagram of the device. The proposed device contains n chains consisting of series-connected bit diode 1, a condenser 2 and bit 3 key. The negative lead of the capacitor 2 of the previous chain through a charging diode 4 is connected with the positive lead of the capacitor 2 onward chain. Charging key 5 connects the positive input the output from the positive battery bus 6. In parallel diodes bit and managed bit keys 3 chains connected respectively managed regulatory elements 7-11 and switching elements 12-17. Switching elements 18-23 connect the charging bus 6 with the positive output 24 of the condenser 2, each chain. Chains connected in parallel between the common output of the inverter 25 and the output pins 26 and 27 via the band switching elements(28, 29), (30, 31), (32, 33), (34, 35), (36, 37), (38, 39).

Converter with two loads, works as follows. In the initial state, the portion of the chain runs on the first load connected to the output pins (25, 26), and the other part on the second load connected to the output pins (25, 27). By order of the switching elements (7-23), (28-39) and periodic switching of the charging key 5 and bit 3 keys working without overlap, is charging k and k2 (integers) of the same type converters, consisting each of n1 and n2, series-connected capacitors, the primary DC voltage source and parallel discharge at appropriate pressures, giving them different levels of output voltages of the U/n1 and U/n2. Increasing k1 and k2 can proportionally increase the output currents of the loads or reduce their odds of pulsation. Thus, the regulatory process in the Converter by varying n1, n2 and k1, k2 by controlling the switching elements (7-23) and (28-39). This feature of the Converter is that due to the switching of these elements, the chain can disconnect from the low-voltage load and connect to the load current, which is increased and Vice versa. This makes better use of the installed capacity of the power circuit of the Converter and, consequently, to improve its weight and dimensions. Expression connecting k1, n1, k2, n2 the total number of chains Converter n has the form (k1n1+k2n2)≤n.

Consider the operation of the Converter when n1=2 and n2=3 and the total number of chains n=6. In this case, different values of k1 and k2. For example, the condition k1=1, k2=1 has 3 outcomes, which are achieved respectively by opening the following groups of switching elements(18, 8, 28, 30; 20, 11, 33, 35, 37), 19, 9, 30, 32; 21, 35, 37, 39) and(18, 8, 28, 30; 2, 35, 37, 39). The voltage at the first load connected to the output pins (25, 26), will be equal to the U/2, and the second load connected to the output pins (25, 27) U/3.

Next possible States of the Converter, in which a separate time intervals all chain regroup and work on each load separately, i.e. k1=3, k2=0 and k1=0, k2=2. These conditions are achieved by opening respectively of the following groups of switching elements(18, 8, 28, 30), (20, 10, 32, 34), (22, 36, 38) and(18, 9, 29, 31, 33), (21, 35, 37, 39).

At the Converter possible condition in which part of the chain is disconnected from both loads. For example, one implementation options of the condition k1=2, k2=0 is the switching elements (18, 8, 28, 30) and(20, 10, 32, 34). In this case, is not involved were the last two chains. However, the switching elements (11, 16, 36) and (17, 38) capacitors these chains are connected in parallel on the output pins (25, 26), thereby reducing the ripple voltage at the first load.

Introduction to the Converter circuit switching elements (28-39) not only provides the load with different levels of stress, but also allows rearrangement of chains from one load to another when changing their currents. The latter circumstance allows to significantly improve weight and dimensions the transformation of the of the motor due to more complete utilization of its installed capacity. So, for example, to ensure the above conditions k1=3, n1=2 and k2=2, n2=3, using two separate converters will require k1 n1+k2 n2=12 capacitor diode chains, and in the case of phase with the changing currents of the loads due to the regrouping of all chains from one load to another, the proposed Converter contains only k1 n1=k2 n2=6 capacitor diode chain.

Thus, the proposed Converter is not only able to work for a few loads, but in terms of changing their currents, has much better weight and dimensions by reducing the number of chains and the associated reduction of the total capacity and the number of used keys and diodes.

Adjustable step-down Converter DC voltage containing input, output and common terminals for connection, respectively, of the DC voltage source and a load, n is connected with the first findings to the General output of the Converter chains, each of which consists of series-connected discharge diode, capacitor and managed bit key, (n-1) charging diodes, each of which is connected between the opposite terminals of the respective capacitors of adjacent chains, managed charging key, included between the input and output charging bus, pravlenie regulatory elements, each enabled bit parallel diode of the respective chain and two groups of switching elements, each switching element of the first group are connected in parallel bit key of the respective chain, and each switching element of the second group included between the battery bus and a common connection point of the capacitor and bit key of the respective chain, characterized in that it introduced the n groups of the m switching elements and (m-1) output pins for connecting additional loads, and in each group the first conclusions of the switching elements are connected to each other and the second output of the respective chain, and their second terminals are connected with the corresponding output pins of the Converter.



 

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The invention relates to the field of devices for converting voltage

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The invention relates to the field of electrical energy conversion, in particular DC-to-DC, and can be used as a device providing both bipolar output voltage from a unipolar input, and the change in output voltage is doubled (increased or decreased) relative to the input with high efficiency

The invention relates to a Converter equipment and can be used as a power source of electroflocculation

FIELD: transforming equipment engineering, possible use in electric power sources.

SUBSTANCE: adjustable decreasing transformer of direct voltage contains input, output and common clamps for connection of, respectively, source of direct voltage and load, n chains connected by their first outputs to common clamp 25. Each chain consists of serially connected discharge diode 1, capacitor 2 and controllable discharge key 3. transformer also contains (n-1) discharge diodes 4, each of which is enabled between differently named outputs of capacitors of appropriate adjacent chains, controllable charge key 5, enabled between input clamp and discharge bus 6, controllable adjusting elements 7-11, each of which is connected in parallel to discharge diode 4 of appropriate chain and two groups of commutation elements, while each commutation element of first group 12-17 is enabled in parallel to discharge key 3 of appropriate chain, while each commutation element of second group 18-23 is enabled between discharge bus 6 and common point of connection 24 of capacitor 2 and discharge key 3 of appropriate circuit. Introduced into transformer are n groups of m commutation elements and (m-1) output clamps for connecting additional loads.

EFFECT: extended functional capabilities due to provision of operation of device for several loads with varying output voltages; significantly improved mass-dimensional characteristics.

1 dwg

FIELD: electricity.

SUBSTANCE: invention relates to electrical engineering and can be used for changing voltage in a network. The device for varying voltage in network is a connection of a set of capacitors or modified capacitor for "pumping" electrical energy from a network with "transformation" of supply voltage. Shortcomings related to manufacture of transformers, which require large material inputs and use of expensive raw material are excluded, as well as servicing and need for the user to settle for power, provided by the transformer substation or some other system for changing voltage. The device can be installed into an open line of the high side. Installation of a capacitor in the circuit leads to increase in cos φ, which is good for the circuit as a whole. The invention does not transform electrical energy, but pumps it out of the network, as it were. Pumping power depends on the capacitance of the device. Large capacitance is required for a high power user. Knowing the required power and voltage of the user and the high side, it is easy to calculate capacitors and standardise the proposed device as a whole. The device allows for considerable decrease in power used by the network due to that, the source of electrical energy supports voltage harmonics and not power in the network.

EFFECT: use of a capacitor as a transformer.

2 cl, 2 dwg

FIELD: electricity.

SUBSTANCE: single-step DC voltage converter comprises transformer, which secondary windings are coupled to output pins of one or several converter outputs, primary winding is coupled to field-effect transistor and feedback winding is coupled to feedback divider, control transistor, time-setting capacitor, three logic inverters and logic AND element, between output of the latter and input of the first logic inverter there is in-series RC-circuit. At low loads or in idle mode gating time of the field-effect transistor is defined not by the time-setting capacitor but by low time constant of the in-series RC-circuit, at that disturbance voltage does not affect operation of the device.

EFFECT: excluded loss in control stability in idle mode and improved reliability of the device at large.

4 cl, 3 dwg

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