STABILIZED CONTROLLED UNIVERSAL HIGH VOLTAGE POWER SUPPLY (VARIANTS)

Abstract

The invention relates to a technical field in which high-capacity low voltage and high voltage power supplies are used. The present device contains a power module 1, comprising a frequency transformer 2 with a primary winding 3 and one 4.1 or several 4.1-4.m secondary windings connected in series to rectifiers 5.1-5.m, which are connected to storage capacitors 6.1-6.m. To the primary winding 3 there is connected a power meter 8, the inputs of which are connected to the outputs of a generator of metered pulses of energy 9 and to a source of constant primary voltage 10. The device is also provided with a microcontroller 14 and a machine interface 15. According to a second variant, the device contains N identical power units, connected in parallel at the output. The claimed invention enables the device to operate in a controlled current source mode, a voltage source mode and a power source mode; the invention further enables the device to adapt to the type of load (resistive, capacitive, complex).

Claims

1. The stabilized controlled universal high voltage power supply includes a power module, that contains transformer with to secondary winding sections and m rectifiers, to the each section of the secondary windings of the transformer is connected the corresponding rectifier input, a rectifiers for all outputs are connected in series, wherein said the device is equipped with a primary DC power supply, power doser, pulse generator of energy doses, a module for monitoring the output voltage and current, computer interface and MCU, wherein the pulse generator of energy doses includes electrically interconnected reference oscillator, pipeline distributor of energy dose pulses, and a comparator, wherein the pulse generator of energy doses includes electrically interconnected reference oscillator, pipeline distributor of energy dose pulses, and a comparator, wherein the power doser is connected to the transformer primary winding and has four inputs, two of which are connected with the primary DC power supply, and the other two inputs are connected to the outputs of pipeline distributor of energy dose pulses, each of m rectifier assemblies are designed as a rectifier, that is connected to the storage capacity, the outputs of which are connected to the input of module for monitoring the output voltage and current, the modules outputs are connected to the comparator and the MCU, MCU is connected with the computer interface and the outputs of MCU are connected to comparator input of pipeline distributor of energy dose pulses.

2. The stabilized controlled universal high voltage power supply according to claim 1 wherein said that pulse generator of energy dose is equipped with pipeline distributor of energy dose, that has two inputs, one of them is connected to the output of the reference oscillator, another is connected to output of the comparator.

3. The stabilized controlled universal high voltage power supply according to claim 1 wherein said that each of m rectifiers is equipped with an even number of storage capacitances, mounted symmetrically about to the rectifier.

4. The stabilized controlled universal high voltage power supply according to claim 1 wherein said the primary DC power supply may be formed by either a single-phase or three-phase rectifier scheme.

5. The stabilized controlled universal high voltage power supply according to claim 1 wherein said a power doser is formed in a bridge circuit, the switches inputs of power doser are connected to the outputs of the primary DC power supply.

6. The stabilized controlled universal high voltage power supply that includes a power module containing m sections transformer secondary winding and m rectifiers, each section of the secondary windings of the transformer is connected to the corresponding input of the rectifier, a rectifiers for all outputs are connected in series, wherein said that stabilized controlled universal high voltage power supply is equipped with N power blocks, each power block includes power module, reference oscillator with n output, means of external control, each power module is equipped with the primary DC power supply, the power doser, the module for monitoring the output voltage and current, pulse generator of energy doses, computer interface and MCU, wherein each power block includes electrically interconnected reference oscillator, pipeline distributor of energy dose and comparator, wherein the power doser is connected to the transformer primary winding and power doser has four inputs, two of them are connected to the primary DC power supply, and the other two inputs are connected to the outputs of pipeline distributor of energy dose, each of m rectifier assemblies is designed as a rectifier, that is connected to the storage capacity, the outputs of storage capacity are connected to the input of module tor monitoring the output voltage and current, the outputs of that module are connected to the comparator and the MCU, MCU is connected to the computer interface and the outputs of MCU is connected to comparator input of pipeline distributor of energy dose, wherein the input of pipeline distributor of energy dose pulses of each N energy block is connected to corresponding n output of reference oscillator and each energy block output is connected to the means of external control in parallel with each other.

7. The stabilized controlled universal high voltage power supply according to claim 6 wherein said that computer interlaces of N power blocks are connected in parallel by MCU bus.

8. The stabilized controlled universal high voltage power supply according to claim 6 wherein said that any of m power module rectifiers is equipped with an even number of storage capacitances, mounted symmetrically with respect to the rectifie.

9. The stabilized controlled universal high voltage power supply according to claim 6 wherein said that the primary DC power supply of power block may be formed by either a single-phase or three-phase rectifier scheme.

10. The stabilized controlled universal high voltage power supply according to claim 6 wherein said that power doser is implemented in a bridge circuit and power doser inputs are connected to the outputs of the primary DC power supply.

11. The stabilized controlled universal high voltage power supply according to claim 6 wherein said that it is equipped with an even number of power blocks, the reference oscillator may be formed with an even number of outputs.

12. The stabilized controlled universal high voltage power supply according to claim 6 wherein said that it is equipped with an odd number of power blocks, the reference oscillator may be formed with an odd number of outputs.

Description

[0028] The essence of the invention (variants) is illustrated by drawings:

[0029] FIG. 1—Functional diagram of stabilized controlled universal high voltage power supply (Variant I);

[0030] FIG. 2—Diagram of functioning of the power block of stabilized controlled universal high voltage power supply (Variant I);

[0031] FIG. 3—Diagram of functioning of the power block of stabilized controlled universal high voltage power supply operating on the load (Variant I);

[0032] FIG. 4—Functional diagram of stabilized controlled universal high voltage power supply (Variant II):

[0033] FIG. 5—Diagram of functioning of the power block (Variant II);

[0034] FIG. 6—Diagram of functioning of the power block operating on load (Variant II);

[0035] FIG. 7—A graphical representation of the proposed method of controlling the output parameters for the general ease (Variant II);

[0036] FIG. 8—Diagram of functioning of two power blocks operating in parallel; (Variant II);

[0037] FIG. 9—Diagram of functioning of four power blocks operating in parallel; (Variant II);

[0038] FIG. 10—Diagram of functioning of eighth power blocks operating in parallel; (Variant II);

[0039] The claimed invention (variants) is illustrated by specific examples that demonstrate the ability to achieve the desired technical result of the above combination of essential features

Variant 1

[0040] Stabilized controlled universal high voltage power supply comprises a power module 1 (FIG. 1), power module 1 includes a frequency transformer 2 with the primary winding 3 and one 4.1 or more 4.1÷4.m secondary windings, they provide galvanic isolation between primary voltage and output voltage. Any secondary winding 4.1÷4.m is connected in series to one of the rectifiers.

[0041] Any secondary winding 4.1÷4.m is connected in series with one of the rectifiers 5.1÷5.m, rectifiers convert the differently directed current of secondary windings 4.1÷4.m to unidirectional branch output current.

[0042] Any rectifiers 5.1÷5.m is equipped with two or more storage capacity 6.1÷6.m., this capacity provide energy storage that is produced by the respective output branch currents from 5.1÷5.m rectifiers, also capacity provide voltage doubling. The first and last outputs of 6.1÷6.m capacitances are connected to the input module tor monitoring the output voltage and current 7. The power doser 8 is connected to the primary winding 3, power doser 8 is implemented in a bridge circuit and is operated alternately in forward and reverse current switching mode through the primary winding 3 of the transformer 2.

[0043] Two inputs of power doser 8 are connected with pulse generator of energy dose 9 outputs for receiving energy dose that is generated by the generator in the form of a rectangular control pulses, the pulse width is determined by the energy dose. The other two inputs of power doser 8 are connected to the primary DC power supply 10, the primary DC power supply may be either a single-phase rectifier or three-phase rectifier circuit, depending on the required output power. Pulse generator of energy dose 9 includes electrically interconnected reference oscillator 11 that generates a reference pulse frequency, pipeline distributor of energy dose 12 that regenerate generator pulses, and a comparator 13, The pipeline distributor of energy dose 12 has one input that is connected to the output of the reference oscillator 11 and second input that is connected to the output of the comparator 13. Two inputs of the comparator 13 are connected to the outputs of a module for monitoring the output voltage and current 7. The device is equipped with a MCU 14 and computer interface 15, while the MCU 14 is adapted to computer interface 15. The MCU 14 inputs are connected to the outputs of a module for monitoring the output voltage and current 7 and outputs of the comparator 13, and MCU output is connected to computer interface 15, that allows communication with standard external controls.

Variant II

[0044] Stabilized controlled universal high voltage power supply comprises from 2 to n power blocks designated I÷N (FIG. 4), any power block outputs are connected to the external load in parallel, any power block is included a reference oscillator 111 with n outputs. Power blocks I÷N are designed similar to each other, and therefore the structural content of any of the power blocks I÷N is described in detail on the example of the power block I.

[0045] Power block comprises a power module 101.1 (FIG. 4), power module 101.1 includes a frequency transformer 102.1 with the primary winding 103.1 and one 104.1.1 or more 104.1.1÷104.1.m secondary windings, transformer provide galvanic isolation between the output voltage and the primary voltage. Any secondary winding 104.1.1÷104.1.m is connected in series with one of the rectifiers 105.1.1÷105.1.m, rectifiers convert the differently directed current of secondary-windings 104.1.1÷104.1.m to unidirectional branch output current.

[0046] Any rectifier 105.1.1÷105.1.m is equipped with two or more storage capacity 106.1.1÷106.1m, this capacity provide energy storage that is produced by the respective output branch currents from 105.1.1÷105.1.m rectifiers, also capacity provide voltage doubling. The first and last outputs of capacitances 106.1.1÷106.1.m are connected to the input module for monitoring the output voltage and current 107.1

[0047] The power module 101.1 is included a power doser 108.1, power supply 110.1, pulse generator of energy dose 109.1, pulse generator of energy dose 109.1 comprise electrically interconnected pipeline distributor of energy dose 112.1 and a comparator 113.1 and MCU 114.1, MCU is connected to computer interlace 115.1. The primary winding 103.1 is connected to the power doser 108.1, power doser 108.1 is implemented in a bridge circuit and is operated alternately in forward and reverse current switching mode through the primary winding 103.1 of the transformer 102.1, Two inputs of power doser 108.1 are connected with outputs of pipeline distributor of energy dose 112.1 which is pan of pulse generator of energy dose 109.1, this inputs are used for receiving energy doses that are generated by the generator 109.1 in the form of a rectangular control pulses, the pulse width determines the energy dose. The other two inputs of power doser 108.1 are connected to the primary DC power supply 110.1, primary DC power supply may be formed either a single-phase rectifier or three-phase rectifier circuit, depending on the required output power.

[0048] One input of pipeline distributor of energy dose 112.1 is connected with one of the n outputs of the reference oscillator 111, second input of pipeline distributor of energy dose 112.1 connected to the output of the comparator 113.1. Two inputs of the comparator 113.1 are connected to the outputs of the module for monitoring the output voltage and current 107.1. The MCU 114.1 inputs are connected to the outputs of a module for monitoring the output voltage and current 107.1 and to the outputs of the comparator 113.1, and MCU output is connected to computer interface 115.1, computer interface allows communication with standard external controls. MCU 114.1 is connected to the MCU bus 116.1 for information exchange with the power blocks II-N that are operated simultaneously.

[0049] Due to the fact that each of the power blocks I÷N (FIG. 4) is designed identically, each input of pipeline distributor of energy dose pulses 112.2÷112.n are connected with corresponding n outputs of the reference oscillator 111. In addition, the connection one of a MCU 114.1÷114.n to the computer interface for communication with external controls automatically makes this MCU “master”, while the rest of the MCU 114.1÷114.n become “slaves”. On FIG. 4, MCU 114.2 is master.

[0050] Stabilized controlled universal high voltage power supply operate as follows;

Variant I

[0051] The device is controlled by commands from an external control, coming through the computer interface 15 to the MCU 14, MCU transmits them as signals to the pulse generator 9 and dosing comparator 13. By means of the reference oscillator 11, comparator 13 and the pipeline distributor of energy dose pulses 12 two rectangular dose pulses are formed with strictly predetermined duty cycle; Doz.Imp.1 and Doz.Imp.2, this pulses are applied to power doser 8. Power doser 8 receives a fixed quantity of energy from the primary DC power supply. One power dose calculate according to the formula: E=U.Math.I.Math.τ.sub.dz, [0052] where U—voltage of the primary DC voltage; [0053] I—current of primary winding; [0054] τ.sub.dz—Doz.Imp.1 and Doz.Imp.2 pulse width;

[0055] Doz.Imp.1 pulse turn on the corresponding switch pair of power doser 8, Direct current I.sub.tr in half wave form (solid line, FIG. 2) flow from the primary DC power supply 10 through the primary winding 3 of the transformer 2. The current amplitude of half-wave is determined by the voltage of the primary DC power supply 10, the half-wave width is determined by resonance parameters of the transformer 2. The half-wave width depends only on the design features of the transformer 2: the magnetic properties of the transformer (BH curve), the number of primary turns, the number of secondary windings and the number of turns in each. For example, when the inductance of the primary winding of the transformer 3 equal 18.8 mH, half-wave width is 8 μs.

[0056] Most of the half-wave energy goes to the secondary windings 4.1÷4.m of the transformer 2 and accumulates in storage capacities 6.1÷6.m; the rest energy of half-wave is stored in the inductances of the transformer 2 and the in parasitic capacitances caused by the constructional features of the circuit components. When direct half-wave is finished, the stored energy recuperate back to primary AC-DC power supply 10 and generate reverse current half-wave on primary winding 3 of transformer 2 of same width (dotted line, FIG. 2), The reverse half-way energy is also supplied to the secondary windings of 4.1÷4.m and is accumulated in storage capacities 6.1÷6.m, wherewith significantly increase the efficiency of the power module 1.

[0057] During the Doz.Imp.2 pulse there is the same process as the Doz.Imp.1 but in the reverse direction. Doz.Imp.2 pulse produces symmetrical “demagnetize” on the transformer 2 and eliminates the magnetic saturation of the core in which the transformer 2 loses its performance.

[0058] In this case, the pulse width should not be less than the half-wave width in order not to break the resonance. Pulse width may be exceed 5-10% of the half-wave resonance width to prevent, excessive reduction of the pulse width that can occur as a result of the precession of circuit parameters.

[0059] When the device is operating on the load, energy in storage capacities 6.1÷6.m will be spent and diagram of functioning of the power module 1 modified (FIG. 3). The angle a describes the voltage drop at storage capacitances 6.1÷6.m and depends on the load. Thus, each pulse provides a fixed dose of energy to be transmitted from the primary DC power supply 10 to a storage capacitances 6.1÷6.m at constant frequency. Frequency is limited by resonance parameters of the transformer 2, U.sub.set is set by external controls through machine interface 15 (FIG. 1) and MCU 14, this voltage must be reached and kept by the load current that does not exceed the I.sub.set.

[0060] The command “Start” initiates a transfer Doz.Imp.1 and Doz.Imp.2 pulses in the power doser 8. Fixed dose of energy begin to flow into storage capacitances 6.1÷6.m with a fixed frequency. This process fill up energy of storage capacity 6.1÷6.m that is released to the load. In this case the current and voltage at the load change according to the load impedance (capacitive, resistive or complex).

[0061] The measured I.sub.meas and U.sub.meas (voltage and current on the load) from a module for monitoring the output voltage and current 7 applied to a comparator 13 where they are compared with preset U.sub.set and I.sub.set. When I.sub.meas>I.sub.set or U.sub.meas>U.sub.set, comparator 13 produces a command “Dsbl Fs”. This command disable passing pulses in the pipeline distributor of energy dose 12. Pipeline distributor of energy dose 12, not earlier than the end of the current pulse if one present at the time of the Dsbl Fs command, stops pulse transmission and delays delivery of the energy doses into storage capacity 6.1÷6.m, whereby the current and voltage at the load will fall. As soon as I.sub.meas>I.sub.set or U.sub.meas>U.sub.set, comparator 13 produces a command “Esbl Fs”. This command enable passing pulses in the pipeline distributor of energy dose 12 and resume impulse transmission from a next (second in this case) pulse before the transmission was stopped. This provides the previously mentioned symmetrical “demagnetize” of Transformer 2 with interruptions of transmitting Doz.Imp.1 and Doz.Imp.2 on the power doser 8, Pipeline distributor of energy dose 12 provides pipeline pulse transfer both at the monitoring of a current settings and monitoring of a voltage settings because autoregulation is produced by the energy parameter (energy dose), and the distribution between current and voltage is “self-regulation”, depending on load. As long as the load voltage has not reached the set value, device is In the current source mode, in this mode the voltage on the load is determined by the load resistance, (the term “resistance” assumes a non-linear load, for example—capacitive). If the load voltage reaches a set value before the current reaches a set value, the device switches to the voltage source mode, in this mode current is determined by the load resistance. Obviously if Iset and Uset are changed while the operation within predetermined limits of voltage and current, module for monitoring the output voltage and current 7, comparator 13 and pipeline distributor of energy dose 12 will automatically handle its as they occur.

[0062] Using external control through computer interface 15, Iset and Uset can be specified not as constant but as a set of values in accordance with a predetermined law. The MCU 14 receive a set of values from external control and transmit it to comparator 13. If there is a short circuit in the load, there is a fast discharge of storage capacitances 6.1-6.m and simultaneous interruption of transmitting Doz.Imp.1 and Doz.Imp.2 on the power doser 8 because I.sub.meas is out of limit. Even if the short circuit is continued, load current drop below the limiting level, transmission of Doz.Imp.1, Doz.Imp.2 pulses resume in volume of the minimum energy dosage that will be carried out to maintain specified load current at zero voltage.

Variant II

[0063] Stabilized controlled universal high voltage power supply operates as follows:

[0064] The device is controlled by commands from an external control, coming through one of several computer interfaces 115.1-115.n to one of a MCUs (for example MCU 114.2 on FIG. 4). That MCU is master. In this case (FIG. 4), the other MCUs 114.1, 114.3-114.n are slave, they are controlled through internal MCU bus 116.1-116.n. In the other case, direct address mode enable to any MCUs 114.1-114.n. MCUs decode commands and set up Uset value, that should be achieved and maintained on the load by the Iset value. The command “Start” initiates a transfer Doz.Imp.1 and Doz.Imp.2 pulses in the power dosers 108.1-108.n which are part of power the blocks 1-N. Power dosers 108.1-108.n receive a fixed quantity of energy from DC power supply. One energy dose calculate according to the formula: E=U.Math.I.Math.τ.sub.dz, [0065] where U—voltage of the primary AC-DC voltage: [0066] I—current of primary winding: [0067] τ.sub.dz—Doz.Imp.1 and Doz.Imp.2 pulse width;

[0068] Doz.Imp.1 pulse turn on the corresponding switch pair of power doser 108.1-108.n. Direct current I.sub.tr in half wave form (solid line. FIG. 5,6,7) flows from the primary DC power supplies 110.1-110.n through the primary windings 103.1-103.n of the transformer 102.1-102.n. The current amplitude of half-wave is determined by the voltage of the primary DC power supply 110.1-110.n, the half-wave width is determined by resonance parameters of the transformer 102.1-102.n. The half-wave width depends only on the design features of the transformer 102.1-102.n: the magnetic properties of the transformer (BH curve), the number of primary turns, the number of secondary windings and the number of turns in each.

[0069] A reference oscillator 111 produce a set of reference frequencies fs.1-fs.n with phase offset and same period and dirty cycle. Phase offset depend on number of parallel power blocks I-N that are operated simultaneously. Functional diagram of two power blocks present on FIG. 8, functional diagram of four power blocks present on FIG. 9 and on FIG. 10 is presented functional diagram of eight power blocks. Any fs.1-fs.n is reference frequency for corresponding pipeline distributor of energy dose 112.1-112.n. Based on reference frequency, each pipeline distributor of energy dose 112.1-112.n produce its DozImp1 and DozImp2 pair. (FIG. 7-10).

[0070] Doz.Imp.1 pulse turn on the corresponding switch pair of power doser 108.1-108.n. Direct current I.sub.tr in half wave form (solid line, FIG. 5,6,7) flows from the primary DC power supply 110.1-110.n through the primary winding 103.1-103.n of the transformer 102.1-102.n. The current, amplitude of half-wave is determined by the voltage of the primary DC power supply 110.1-110.n, the half-wave width is determined by resonance parameters of the transformer 102.1-102.n. The half-wave width depends only on the design features of the transformer n 102.1-102.n: the magnetic properties of the transformer (BH curve.), the number of primary turns, the number of secondary windings and the number of turns in each. For example, when the inductance of the primary winding of the transformer 3 equal 18.8 mH, half-wave width is 8 μs.

[0071] Most of the half-wave energy goes to the secondary windings 104.2.1÷104.2.m of the transformer 102.2 and accumulates in storage capacities 106.2.1÷106.2.m; the rest energy of half-wave is stored in the inductances of the transformer 102.2 and in the parasitic capacitances caused by the constructional features of the circuit components. When direct half-wave is finished, the stored energy recuperate back to primary DC power supply 110.2 and generate reverse current half-wave on primary winding 103.2 of transformer 102.2 of same width. The reverse half-wave energy is supplied to the secondary windings of 104.2.1÷104.2.m and is accumulated in storage capacities 106.2.1÷106.2.m, wherewith significantly increase the efficiency of the power module 101.2.

[0072] During the Doz.Imp.2 pulse there is the same process as the Doz.Imp.1 but in the reverse direction. Doz.Imp.2 pulse produces symmetrical “demagnetize” on the transformer 102.2 and eliminates the magnetic saturation of the core in which the transformer 102.2 loses its performance.

[0073] In this case the pulse width should not be less than the half-wave width in order not to break the resonance. Pulse width may be exceed 5-10% of the half-wave resonance width to prevent excessive reduction of the pulse width that can occur as a result of the precession, of circuit parameters. Thus, each pulse provides a fixed dose of energy to be transmitted from the primary DC power supply 110.1-110.n to a storage capacitances 106.2.1÷106.2.m at constant frequency. Frequency is limited by resonance parameters of the transformer 102.2.

[0074] The command “Start” initiates a transfer Doz.Imp.1 and Doz.Imp.2 pulses in the power doser 108.2. Fixed dose of energy begin to flow into storage capacitances 106.2.1÷106.2.m with a fixed frequency. This process fill up energy of storage capacity 106.2.1÷106.2.m that is released to the load. In this case the current and voltage at the load change according to the load impedance (capacitive, resistive or complex).

[0075] When the device is operating on the load, energy in storage capacities 106.2.1÷106.2.m will be spent and diagram of functioning of the power block II modified (FIG. 6), The angle a describes the voltage drop at storage capacitances 106.2.1÷106.2.m and depends on the load. Thus, each pulse provides a fixed dose of energy to be transmitted from the primary DC power supply 110.1-110.n to a storage capacitances 106.2.1÷106.2.m at constant frequency. Frequency is limited by resonance parameters of the transformer 102.2.

[0076] The measured i.sub.meas and U.sub.meas, (voltage and current on the load) from a module for monitoring the output voltage and current 107.2 is applied to a comparator 113.2 where they are compared with preset U.sub.set and I.sub.set. When I.sub.meas>I.sub.set or U.sub.meas>U.sub.set, comparator 113.2 produces a command “Dsbl Fs”. This command disable passing pulses in the pipeline distributor of energy dose 112.2. Pipeline distributor of energy dose 112.2, not earlier than the end of the current pulse if one present at the time of the Dsbl Fs command, stops pulse transmission and delays delivery of the energy doses into storage capacity 106.2.1÷106.2.m whereby the current and voltage at the load will fall. As soon as I.sub.meas<I.sub.set or U.sub.meas<U.sub.set, comparator 113.2 produces a command “Enbl Fs”. This command enable passing pulses in the pipeline distributor of energy dose 112.2 and resume impulse transmission from a next (second in this case) pulse before the transmission was stopped. This provides the previously mentioned symmetrical “demagnetize” of Transformer 102.2 with interruptions of transmitting Doz.Imp.1 and Doz.Imp.2 on the power doser 108.2. Pipeline distributor of energy dose 112.2 provides pipeline pulse transfer both at the monitoring of a current settings and monitoring of a voltage settings because autoregulation is produced by the energy parameter (energy dose), and the distribution between current and voltage is “self-regulation”, depending on load. As long as the load voltage has not reached the set value, device is in the current source mode, in which the voltage on the load is determined by the load resistance (the term “resistance” assumes a non-linear load, for example—capacitive). If the load voltage reaches a set value before the current reaches a set value, the device switches to the voltage source mode in which current is determined by the load resistance.

[0077] Obviously if I.sub.set and U.sub.set are changed while the operation within predetermined limits of voltage and current, module for monitoring the output voltage and current 107.2, comparator 113.2 and pipeline distributor of energy dose 112.2 will automatically handle its as they occur.

[0078] Using external control through computer interface 115.2, I.sub.set and U.sub.set can be specified not as constant but as a set of values in accordance with a predetermined law. The MCU 114.2 receive a set of values from external control and transmit it to comparator 113.2. If there is a short circuit in the load, there is a fast discharge of storage capacitances 106.2.1÷106.2.m and simultaneous interrupt transmission of Doz.Imp.1 and Doz.Imp.2 on the power closer 108.2 because I.sub.meas is out of limit. Even if the short circuit is continued, load current drop below the limiting level, transmission of Doz.Imp.1, Doz.Imp.2 pulses resume in volume of the minimum energy dosage that will be carried out to maintain specified load current at zero voltage.

[0079] The energy dosage flow is based on fs.1-fs.n while n power blocks operate simultaneous and parallel (FIG. 4). Reference frequencies fs.1-fs.n are phase shifted (FIG. 8-10), total charge of storage capacitances grows that more uniform, than it is more quantity of power blocks. Therefore current and voltage on the load are reduced.

[0080] If there are I÷N parallel power blocks, each of the N power block must have at n times less power then total output power of device, and thus, power block can be composed of smaller size transformers and low power switches.

[0081] The claimed group of inventions is characterized by a set of essential features.

[0082] The claimed group of inventions conform with the conditions of novelty and industrial applicability, because its implementation is possible by using the existing technologies.