Magnetically coupled step-up DC voltage regulator with continuous power transfer to load

Abstract

FIELD: electrical engineering.SUBSTANCE: constant voltage regulators used in secondary power supply systems for regulating and stabilizing constant output voltage. The device comprises a power control key 1, a magnetically coupled magnetic element 10 containing three windings 2, 3, 7, with each of which capacitors 4, 5, 8 are connected in series, wherein winding 2, with its beginning connected to the positive terminal of the input DC voltage source, with its end to capacitor 4, forms the first branch, and the second capacitor 5, also connected to the positive terminal of the input DC voltage source, with its second pole connected to the beginning of the second winding 3, the end of which is connected to capacitor 4, forms the second branch included in parallel with the first branch, and between the end of winding 2 and the beginning of winding 3 a shunt diode 6 is connected, with the anode to the end of winding 2, and the cathode to the beginning of winding 3, wherein the third winding 7 of the magnetic element 10 with a series-connected capacitor 8 is connected to the common connection point of the end of winding 3 and capacitor 4, in parallel to which the load 9 is connected, with its end to the common connection point of the end of winding 3 with capacitor 4, and its beginning to the common connection point of capacitor 8 with load 9, the second terminals of which are connected to the common bus, and the regulating key 1 is connected with its positive pole to the anode of shunt diode 6, and with its negative pole to the common bus.EFFECT: reducing the pulse current through the regulating key and the shunt diode, increasing efficiency, and continuous transfer energy to the load.1 cl, 1 dwg

Description

[0001] The invention relates to electrical engineering, in particular to constant voltage regulators, and can be used in secondary power supply systems for regulating and stabilizing constant output voltage.

[0002] DC voltage regulators are known that increase the output voltage in relation to the input DC voltage [1].

[0003] The disadvantage of known constant voltage regulators that increase the output voltage in relation to the input constant voltage is the inability to reduce the pulse current through the regulating key and shunt diode, increase efficiency, and continuously transfer energy to the load.

[0004] The closest in technical essence to the proposed device is a step-up DC voltage regulator [1].

[0005] The disadvantage of this DC step-up voltage regulator is the inability to reduce the pulse current through the regulating key and shunt diode, and increase the efficiency, and continuously transfer energy to the load.

[0006] The stated objective is achieved in that the device, instead of one linear inductance, includes a magnetically coupled magnetic element 10, containing three windings 2, 3, 7, with each of which capacitors 4, 5, 8 are connected in series, wherein the first winding 2 is connected with its beginning to the positive terminal of the input DC voltage source, with its end to the capacitor 4 forming the first branch, and the second capacitor 5, also connected to the positive terminal of the input DC voltage source, with its second pole connected to the beginning of the second winding 3, the end of which is connected to the capacitor 4, forming the second branch, included in parallel with the first branch, and between the end of winding 2 and the beginning of winding 3, a shunt diode 6 is connected, with its anode to the end of winding 2, and its cathode to the beginning of winding 3, while the third is connected to the common connection point of the end of winding 3 and capacitor 4 winding 7 of magnetic element 10 with a series-connected capacitor 8, in parallel to which a load 9 is connected,with the end to the common connection point of the end of winding 3 with capacitor 4, and the beginning to the common connection point of capacitor 8 with load 9, the second terminals of which are connected to the common bus, and the regulating key 1 is connected with its positive pole to the anode of shunt diode 6, and with its negative pole to the common bus.

[0007] Fig. 1 shows the basic electrical circuit diagram of the proposed magnetically coupled step-up DC voltage regulator with continuous energy transfer to the load.

[0008] In it (Fig. 1) a power control key 1, a magnetically coupled magnetic element 10 containing three windings 2,3,7, with each of which capacitors 4,5,8 are connected in series, wherein winding 2 is connected with its beginning to the positive terminal of the input source of direct voltage, with its end to capacitor 4 forming the first branch, and the second capacitor 5 is also connected to the positive terminal of the input source of direct voltage, with its second pole connected to the beginning of the second winding 3, the end of which is connected to capacitor 4, forming the second branch included in parallel with the first branch, and between the end of winding 2 and the beginning of winding 3 a shunt diode 6 is connected, with the anode to the end of winding 2, and the cathode to the beginning of winding 3, while the third winding 7 of the magnetic element 10 with a series-connected capacitor 8, in parallel to which a load 9 is connected,with the end to the common connection point of the end of winding 3 with capacitor 4, and the beginning to the common connection point of capacitor 8 with load 9, the second terminals of which are connected to the common bus, and the regulating key 1 is connected with its positive pole to the anode of shunt diode 6, and with its negative pole to the common bus.

[0009] The operating principle of the proposed magnetically coupled step-up DC voltage regulator will be considered based on the assumption of ideal key elements, steady-state operating mode, and continuous change in magnetic flux in the core of the magnetically coupled magnetic element.

[0010] Let us denote by D the duration of the on state of key 1 relative to period T.

[0011] When the key 1 is closed, during the time DT, two processes occur simultaneously - the accumulation of magnetic energy in the magnetically coupled magnetic element 10 of the input DC voltage and capacitors 4.5 charged to voltage V IND / (1-D) and the removal of magnetic energy from the magnetic element 10 through the winding 7 into the load, as a result of which a differential current flows through the regulating key, reducing the key current by the amount of the load current.

[0012] After the regulating key 1 is turned off, the polarity of the emf on all windings of the magnetic elements is reversed and the shunt diode 6 is turned on, which is in a conducting state for a time (1-D)T, through which the capacitors 4.5 are charged to a voltage V IN D / (1-D), and the load current is subtracted from the current of the shunt diode, since the current of the winding 7 of the magnetic element 10 is switched to the constant input voltage source, capacitors 4.5 and flows towards the forward current through the shunt diode 6, and the output voltage V is established on the load. IN / (1-D).

[0013] Thus, the proposed magnetically coupled step-up DC voltage regulator with continuous energy transfer to the load, unlike the known device, allows for highly efficient conversion of the consumed energy from the DC input voltage source by transferring energy to the load over time T with simultaneous subtraction of the load current from the current of the regulating switch 1 and the shunt diode 6.

[0014] 1. Polikarpov A.G., Sergienko E.F. Single-stroke converters in power supply devices of electronic equipment, “Radio and Communications”, 1989, p. 6, Fig. 1.2.

Claims

A magnetically coupled step-up DC voltage regulator with continuous energy transfer to a load, comprising a regulating key, a shunt diode, an output capacitor with a parallel-connected load, the second pole of which is connected to a common bus, characterized in that three magnetically coupled windings are introduced, with each of which a corresponding capacitor is connected in series, wherein the first magnetically coupled winding is connected with its beginning to the positive terminal of the input DC voltage source, with its end to the first capacitor, with which it forms the first branch, the second capacitor is connected with its first pole to the positive terminal of the input DC voltage source, with its second pole to the beginning of the second magnetically coupled winding, the end of which is connected to the first capacitor, with which it forms the second branch, connected in parallel with the first branch, a shunt diode is connected between the end of the first magnetically coupled winding and the beginning of the second magnetically coupled winding,connected by its anode to the end of the first magnetically coupled winding, and by its cathode to the beginning of the second magnetically coupled winding, wherein a third magnetically coupled winding with a series-connected third capacitor with a parallel-connected load is connected to the common connection point of the end of the second winding and the capacitor of the first branch, connected by its end to the common connection point of the capacitor of the first branch with the end of the magnetically coupled winding of the second branch, and by its beginning connected to the third capacitor with a parallel-connected load, the second terminals of the load and the third capacitor are connected to a common bus, the regulating key is connected with its positive pole to the anode of the shunt diode, and with its negative pole to the common bus.

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