RU2303281C1 - Secondary power supply - Google Patents

Abstract

FIELD: electro-technical complexes, possible use for ground testing of onboard electric equipment for autonomous objects, in particular, spaceships.

SUBSTANCE: secondary power supply contains, connected serially, impulse and continuous controlling elements, first voltage sensor between the output of continuous controlling element and common wire, connected by output to subtracting input of first controlling device, to adding input of the latter supporting voltage source is connected; second voltage sensor, first input of which is connected to output of impulse controlling element, and output is connected to subtracting input of second controlling device, and pilot load resistor. New feature is that device additionally includes third and fourth voltage sensors, third, fourth and fifth controlling devices, parallel-connected controlled key and decoupling diode, while parallel-connected controlled key and resistor by one unit are connected to output of continuous controlling element, by other unit to collector of transistor, emitter of which via resistor of pilot load is connected to common wire, to collector of transistor second input of second voltage sensor and first input of fourth voltage sensor are connected, second input of the latter being connected to common wire, and output - to subtracting input of fifth controlling device, to adding input of which cathode unit of diode block is connected, output of fifth controlling unit is connected to transistor base, anodic unit of diode block is connected to output of supporting voltage source, first input of third voltage sensor is connected to output of impulse controlling element, second input of this sensor is connected to output of continuous controlling element, and output of third voltage sensor through a filter is connected to inputs of third and fourth controlling devices, output of fourth controlling device is connected to key control input, while output of third controlling device is connected to control input of thyristor key, anodic unit of which is connected to output of impulse controlling element, and cathode unit is connected to continuous controlling element control input, output of first control device being connected to the same input via a decoupling diode.

EFFECT: preserved serviceability of supply in case of sudden failure of continuous controlling element and possible solution of emergency situation.

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Description

The invention relates to electrical complexes and is intended for ground testing of on-board electrical equipment of autonomous objects, in particular spacecraft.

Known secondary power source (copyright certificate SU No. 1285457, class G06G 7/48), containing a series-connected continuous voltage regulator and a pulse voltage regulator. The source is designed to reproduce non-linear characteristics.

Closest to the invention is a secondary power source (S. Korenev. Powerful laboratory power supply with increased efficiency / S. Korenev // Radio, 2004, 3, p. 35), containing a serially connected pulse regulating element (IRE) and a continuous regulating element ( NRE), the first voltage sensor (ND) between the output of the NRE and the common wire, connected by the output to the subtracting input of the first control device (UE), the reference voltage source is connected to the summing input of the last; a second voltage sensor, the output of which is connected to the subtracting input of the second UU, and a standby load resistor.

The disadvantage of this source is the creation of an emergency for the consumer in the event of a failure of an NRE or the first UU. When saturated (closed) NRE voltage at the output of the NRE increases to the maximum voltage of the IRE, because zero voltage is supplied to the subtracting input of the second UU from the second voltage sensor. When closing (opening) the NRE, the output voltage tends to zero. For on-board electricity consumers, a sudden power failure can cause an emergency associated with a violation of the consumer shutdown algorithm.

The problem solved by the invention is the preservation of operability (increased survivability) of the source in the event of a sudden failure of the NRE.

The problem is solved in that in a secondary power source containing serially connected pulse and continuous control elements, the first voltage sensor between the output of the NRE and the common wire, connected by the output to the subtracting input of the first control device, a reference voltage source is connected to the summing input of the last; the second voltage sensor, the first input of which is connected to the output of the pulse regulating element, and the output is connected to the subtracting input of the second UE, and the standby load resistor, according to the invention, the third and fourth voltage sensors, the third, fourth and fifth UE, are connected in parallel with a controlled key and a collector a resistor, a transistor, a diode block, a thyristor switch and an isolation diode, with a controllable switch and a resistor connected in parallel with one node connected to the output of the NRE and the other node to the collector of the trans a resistor, the emitter of which is connected to a common wire through a standby resistor, the second input of the second voltage sensor and the first input of the fourth voltage sensor are connected to the collector of the transistor, the second input of which is connected to the common wire, and the output to the subtracting input of the fifth control unit, to the summing input of which the cathode node of the diode block is connected, the output of the fifth CC is connected to the base of the transistor, the anode node of the diode block is connected to the output of the reference voltage source, the first input of the third voltage sensor under it is connected to the IRE output, the second input of this sensor is connected to the HP output, and the output of the third voltage sensor through the filter is connected to the inputs of the third and fourth UE, the output of the fourth UU is connected to the key control input, and the output of the third UU is connected to the thyristor key control input, anode the node of which is connected to the output of the IRE, and the cathode node to the input of the control of the IRE, to the same input through the decoupling diode is connected the output of the first UE.

The technical result of the invention is to maintain the output voltage of the secondary source at a predetermined level required by the test method.

The drawing shows a structural diagram of the inventive power source.

The secondary power source contains a pulse regulating element 1, a continuous regulating element 2, the first 3, the second 4, the third 5, the fourth 6, the fifth 7 control devices, the first 8, the second 9, the third 10, the fourth 11 voltage sensors (DN), the filter 12 connected in parallel with a controlled key 13 and a collector resistor 14, a transistor 15, an on-load resistor 16, a diode block 17 consisting of series-connected diodes, a thyristor switch 18, a reference voltage source 19 and an isolation diode 20.

The pulse control element 1, to the control input of which the output of the second control device 4 is connected, together with the second voltage sensor 9, the first input of which is connected to the output of the IRE, and the output is connected to the subtracting input of the second UE, form a pulse voltage difference stabilizer U ₁ -U _K measured by the second voltage sensor 9.

A continuous control element 2, to the control input of which through the decoupling diode 17 the output of the first UU 3 is connected, together with the first voltage sensor 8, the first input of which is connected to the output of the NRE, the second input is to the common wire, and the output is connected to the subtracting input of the first UU 3, form a continuous voltage stabilizer U ₂ , which is set by the reference voltage source 19 connected to the summing input of the first control device 3.

In parallel, the controlled switch 13 and the resistor 14 are connected by one node to the output of the NRE, and by the other node to the collector of the transistor 15, the emitter of which is connected to the common wire through the standby resistor 16, the second input of the second voltage sensor 9 and the first input of the fourth are connected to the collector of transistor 15 voltage sensor 11, the second input of which is connected to a common wire, and the output to the subtracting input of the fifth control device 7, to the summing input of which is connected the cathode assembly of the diode block 17, the output is o the control device 7 is connected to the base of the transistor 15, the anode assembly of the diode block 17 is connected to the output of the reference voltage source 19, the third voltage sensor 10 is connected by the first input to the output of the IRE 1, the second input to the output of the IRE 2, and the output of the third sensor 10 through the filter 12 connected to the inputs of the third 5 and fourth 6 CU, the output of the fourth control device 6 is connected to the control input of the key 13, and the output of the third control device 5 is connected to the control input of the thyristor key 18, the anode node of which is connected to the output RE and cathode assembly EME to an input control, to the same input through a decoupling diode 20 connected to the output of the first control device 3.

The secondary power source operates as follows.

In the normal mode, the voltage at the output of the third voltage sensor 10 is greater than the triggering level (threshold) of the CC 6 and less than the threshold level of the CC 5, the controlled key 13 is closed, and the thyristor key 18 is open.

The voltage at the output of the second sensor 9 is generally proportional to the sum of the voltages

where: U ₁ is the output voltage of the IRE, U ₂ is the output voltage of the IRE, U _K is the voltage at the collector of the transistor 15, K ₉ is the transmission coefficient of the second voltage sensor 9.

When the key 13 is closed, the voltages U ₂ and U _K are equal, therefore, the voltage U _{9 is} proportional to the voltage drop at the NRE

Since U ₉ is the feedback voltage for a pulse voltage regulator, the IRE maintains a constant voltage drop U _CT = U ₁ -U ₂ on the NRE

and the NRE operates in the normal mode, stabilizing the voltage U ₂ .

With a sudden failure of the NRE, two situations are possible: the NRE is closed and the NRE is open. Let's consider each situation separately.

Situation 1. With a closed NRE, the voltages U ₁ and U _{2 are} almost equal, so the voltage at the output of the third DN 10 becomes less than the threshold level of the fourth UU 6, the controlled switch 13 opens and the voltage U ₉ , in accordance with (1), becomes equal

U ₉ = K ₉ (U ₁ -U _K ).

In its turn

U ₁ = U _K + U _ST .

In this case, U ₁ = U ₂ , therefore, to ensure the pre-emergency level of U _2N, it is necessary to reduce U ₁ to U _2N by decreasing U ₉ . Equating U ₁ = U _2N , we obtain that the quantity U _K required for the quantity U _{1 to} become equal to U _2N has the form

where U _2N - pre-accident voltage level U ₂ .

To save the required value (4) of the value of U _{K, the} transistor 15, together with the fourth voltage sensor 11 and the fifth UU 7, forms a voltage stabilizer U _K. The voltage U _K is measured by the fourth voltage sensor 11 and compared with a reference voltage U ₁₇ equal to the difference between the reference voltage of the source 19 and the voltage drop U _D on the diode block 17

U ₁₇ = U ₁₉ -U _D

The fifth UU 7 changes the state of the transistor 15 so that

U _K = U ₁₇ / K ₁₁ ,

where K ₁₁ is the transmission coefficient of the fourth voltage sensor 11.

Knowing U _K and K ₁₁ , you can calculate the required value of U ₁₇ , U _D and the number of diodes in the diode block 17.

When regulating a wide range of output voltage U ₂ NRE by changing the reference voltage U ₁₉ to ensure conditions (4), the gear ratios of the first and fourth voltage sensors 8 and 11 should be approximately equal. The required voltage values U ₁₇ and U _{K are} provided by selecting the number of series-connected diodes in the diode block 17.

Situation 2. When the NRE is open, the voltage at the output of the third DN 10 becomes higher than the threshold level of the third UU 5, the thyristor switch 18 closes, a large opening voltage is applied to the NRE control input, the decoupling diode 20 is locked, the NRE 2 enters the saturation state (closes) and operation source occurs similar to situation 1.

Filter 12 serves to temporarily delay and suppress interference in order to eliminate false alarms of key devices.

Thus, when the NRE closes or opens the NRE, the voltage at the NRE output remains approximately at the same level as in the normal mode, because the IRE takes on the voltage stabilization function U ₂ .

In general, all the changes introduced allow us to maintain the operability (increase survivability) of the secondary source in case of a sudden failure of the continuous control element and thereby eliminate the emergency situation when testing the on-board electrical equipment of autonomous objects.

Claims (1)

A secondary power source containing serially connected pulse (IRE) and continuous (IRE) control elements, a first voltage sensor between the output of the IRE and the common wire, connected by the output to the subtracting input of the first control device (UE), the reference voltage source is connected to the summing input of the last; a second voltage sensor, the first input of which is connected to the output of the pulse regulating element, and the output is connected to the subtracting input of the second IRE control device, and a standby load resistor, characterized in that the third and fourth voltage sensors, the third, fourth and fifth control devices are additionally introduced, a controllable key and a collector resistor connected in parallel, a transistor, a diode unit, a thyristor switch and an isolation diode, and a controllable key and a resistor connected in parallel with one node connected to the output of the NRE, and another node to the collector of the transistor, the emitter of which is connected to the common wire through the standby resistor, the second input of the second voltage sensor and the first input of the fourth voltage sensor, the second input of which is connected to the common wire, and the output - to the subtracting input of the fifth control device, to the summing input of which the cathode node of the diode block is connected, the output of the fifth control device is connected to the base of the transistor, the anode node of the diode block the eye is connected to the output of the reference voltage source, the first input of the third voltage sensor is connected to the output of the IRE, the second input of this sensor is connected to the output of the IRE, and the output of the third voltage sensor through the filter is connected to the inputs of the third and fourth control devices, the output of the fourth control device is connected to the input key control, and the output of the third control device is connected to the thyristor key control input, the anode node of which is connected to the IRE output, and the cathode node to the NRE control input, to this the input through the decoupling diode is connected to the output of the first control device.