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INVENTION
Patent of the Russian Federation RU2287885
METHOD OF SUPPLYING LOADING BY DC
The name of the inventor: Viktor Korotkikh (RU); Evgenov Gennady Dmitrievich (RU)
The name of the patent holder: FEDERAL STATE UNITARY ENTERPRISE "Scientific and Production Association of Applied Mechanics named after Academician MF Reshetnev" (RU)
Address for correspondence: 662972, Krasnoyarsk Territory, Zheleznogorsk, ZATO Zheleznogorsk, ul. Lenina, 52, FSUE NPO PM, R.P. Turkenichu
Date of commencement of the patent: 2005.03.21
The present invention relates to the electrical industry and can be used in the creation and operation of self-contained power supply systems, predominantly an artificial satellite. A method for supplying a DC load via a stabilized converter from a source of limited power, for example a solar battery, is provided with an output voltage close to the value of the maximum input voltage of the stabilized converter, which consists in stabilizing the voltage across the load by a stabilized converter. The technical result of the invention is to increase the efficiency of using a primary source of limited power. Ultimately, this is an increase in the resource potential of the satellite. The technical result is achieved by the fact that an additional voltage source is formed in the circuit of the primary source of limited power, and the addition of an additional voltage source to the work is performed when the voltage of the solar battery is reduced by not less than the voltage of the additional source. In addition, the voltage value of the auxiliary source is regulated based on the condition that the total voltage of the solar battery and the voltage of the additional source of the maximum input voltage of the stabilized converter are not exceeded.
DESCRIPTION OF THE INVENTION
The present invention relates to the electrical industry and can be used in the creation and operation of self-contained power supply systems, predominantly an artificial satellite.
At present, the process of creating coherent satellites of the earth with a large output power (10-25 kW) and a long (10-15 years) service life is underway in space technology.
This task, with respect to the autonomous power supply system of the satellite, can be solved only if the efficiency of using primary electricity sources (mainly solar batteries), secondary electric power sources (mainly accumulator batteries) is improved and the automation system coordinating the work of these sources is coordinated with ensuring a stable voltage for Inputs of electricity consumers.
Known are the ways of supplying the load with a constant, stable voltage, realized by DC power supply systems, described in "Power Supply Systems for Spacecraft", Novosibirsk, VO "Nauka", 1994 [1].
Known methods for supplying a DC load include stabilizing the voltage from the primary source of limited power (solar battery) on the load by stabilized transducers of various types.
The closest technical solution is the DC power feeding method described in the author's certificate No. 1771037, which is chosen as a prototype.
The known method involves selecting the output voltage of a primary source of limited power (solar battery) to the maximum allowable level of the input voltage of the stabilized converter.
The disadvantage of the known method is that the existing limitation of the maximum level of the input voltage of the stabilized converter does not allow to use the primary source of limited power to the full extent with a long service life of the satellite.
In case of degradation, during the operation of the satellite, the voltage of the primary source is below the permissible level, the available energy of the primary source of limited power can no longer be used. As a result, the satellite will not be able to fulfill its target functions.
The object of the present invention is to increase the efficiency of using a primary limited power source. Ultimately, this is an increase in the resource potential of the satellite.
The goal is achieved by the fact that an additional voltage source is formed in the circuit of the primary source of limited power, and the inclusion of an additional voltage source into the work is performed when the voltage of the solar battery decreases by not less than the voltage of the additional source. In addition, the voltage value of the auxiliary source is adjusted based on the condition that the total value of the solar battery voltage and the voltage of the additional source of the maximum input voltage of the stabilized converter are not exceeded.
The essence of the proposed method is explained by the device in FIG. 1 realizing this method, which shows a functional diagram of an autonomous power system of the satellite.
The device implementing the proposed method comprises a solar battery 1 connected to a load 2 via a voltage converter 3, a battery 4 connected via a charging converter 5 to a solar battery 1, and via a discharge converter 6 to the input of an output filter of the voltage converter 3. In addition, An additional voltage source (booster element) is installed in the circuit of the primary source of limited power, and load 2 in its composition contains an on-board computer, a telemetry device, and a command-measuring radio link.
The booster element 7 consists of a regulating switch T5 controlled by the control circuit 8, a booster unit executed on the transformer Tr2 (Tp2.1 and Tp2.2), transistors T3 and T4, a rectifier on diodes D3 and D4 and a shunt diode D5.
The charging converter 5 consists of a control switch 9 controlled by a control circuit 10, a booster node executed on a transformer Tp1, transistors T1 and T2, a rectifier on diodes D1 and D2.
The discharge converter 6 consists of a control key 11 controlled by a control circuit 12.
The voltage converter 3 consists of a regulating switch 13 controlled by a control circuit 14, an input filter C1 and an output filter on a diode D, a throttle L and a capacitor C.
The control circuits of the converters 10, 12, 14 and 8 are made in the form of pulse width modulators, the input is connected to the buses of the stabilized voltage and having feedback on the current limitation.
The device works as follows. During operation, the battery 4 operates in the storage mode and periodic recharges from the solar battery 1 through the charging converter 5. This mode of operation allows it to be kept in constant readiness in the event of loss of satellite orientation on the Sun or the passage of shadow areas of the orbit.
Load 2 is supplied from the solar battery 1 through the booster element 7 and the voltage converter 3.
When the shadow areas of the orbit pass or when the orientation is disturbed, the load 2 is supplied from the storage battery 4 through the discharge converter 6.
At the initial stage of the satellite operation, when the solar battery voltage is sufficiently high, the booster element 7 is turned off and the load 2 from the solar battery 1 is fed through the shunt diode D5.
When the voltage of the solar battery 1 is lowered to the lower level (in the illuminated portion of the orbit) during the operation of the satellite, the booster element 7 is switched on by radio command from the Earth or automatically on command from the on-board computer in accordance with a predetermined program. In this case, the total voltage of the solar battery 1 and the booster element 7 will not exceed the maximum input voltage of the voltage converter 3, the boost will be maximum, otherwise the boost will be limited by the transistor T5 controlled by the control circuit 8, or the booster element can be turned off.
Thus, DC power supply from a limited power source (solar battery) will be provided at high voltage (limited power source plus booster) at the input of the stabilized converter, which allows to increase the efficiency of using a primary limited power source and, as a result, increase the resource potential of the satellite as a whole .
The proposed method of supplying the load with a direct current has been tested and is planned to be implemented on the artificial earth of the development and manufacturing of the enterprise.
CLAIM
1. A method for supplying a DC load via a stabilized converter from a power source of limited power, for example a solar battery, with an output voltage close to the value of the maximum input voltage of the stabilized converter, which consists in stabilizing the load on the load by a stabilized converter, characterized in that in the primary source of limited power An additional voltage source is formed, and the inclusion of an additional voltage source into operation is performed when the voltage of the solar battery is reduced by not less than the voltage of the additional source.
2. A method according to claim 1, characterized in that the value of the additional source voltage is adjusted based on the condition that the total voltage of the solar battery and the voltage of the additional source of the maximum input voltage of the stabilized converter are not exceeded.
print version
Date of publication 12.01.2007gg
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