JPH051696U - Ion engine flow regulator controller - Google Patents

Abstract

(57) [Abstract] [Purpose] A single power supply supplies a stable power supply voltage to a plurality of flow rate regulator drive circuits to stably control the attitude of the satellite. [Structure] The voltage drop across the flow rate regulator caused by applying a flow rate regulator drive signal applied to the flow rate regulator group to the flow rate regulator is fed back to the logic operation circuit as a feedback signal, and the power supply is controlled by the logic operation circuit. [Effect] It is possible to supply a constant flow rate regulator drive signal to the flow rate regulator group.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a flow controller for an ion engine, and more specifically, a plurality of flow controller drive circuits and a group of flow controllers are connected to an output terminal of one power source mounted on an artificial satellite. It is characterized in that the power supply is controlled by using a logical operation circuit on the satellite for the load fluctuation of each flow rate regulator group, and a stable voltage is supplied to the flow rate regulator drive circuit.

[0002]

[Prior Art]

First, a conventional flow controller for an ion engine will be described. FIG. 3 is a diagram showing a flow controller of a conventional ion engine, in which 1A to 1C are first power supplies, second power supplies, third power supplies, and 2A to 2C are first power supplies. The flow rate regulator drive circuit, the second flow rate regulator drive circuit, 3A to 3C are respectively the first flow rate regulator group, the second flow rate regulator group, the third flow rate regulator group, and 4A is the first. The first power supply line 4B supplied from the power source 1A to the first flow rate regulator drive circuit 2A is the second power supply line 4B supplied from the second power source 1B to the flow rate regulator drive circuit 2B. The first drive signal 5B supplied from the third power source 1C to the third flow rate regulator drive circuit 2A is supplied from the second flow rate regulator drive circuit 2B to the second flow rate regulator group 3B. The second drive signal 5C is supplied from the third flow rate regulator drive circuit 2C to the third flow rate regulator 3C. The third drive signal, V _B, is a bus line.

In such a conventional configuration, a power supply current is sent from each power supply to each flow rate regulator drive circuit so that a certain surface of the artificial satellite always faces the earth with respect to the attitude of the satellite. The flow regulator drive circuit supplies a flow regulator drive signal to each flow regulator group according to the power supply current to open the flow regulators, thereby adjusting the flow of mercury and adjusting the injection of mercury. .

[0004]

SUMMARY OF THE INVENTION The above-described conventional flow controller for an ion engine is a flow controller that opens and closes the flow controller so that a certain plane of the satellite always faces the attitude of the satellite with respect to the earth. Since a power supply that meets the requirements of drive circuits 2A to 2C was required, each flow rate regulator drive circuit had one power supply. Therefore, changes in the power supply bus line V _B are received by the power supplies 1A to 1C, and therefore the flow regulator drive circuits 2A to 2C are hardly affected. In addition, each power supply and the flow rate regulator drive circuit are configured in a pair, and the power source absorbs the voltage variation due to the voltage variation of the flow rate regulator drive circuit, so that it does not affect other power sources and the flow rate regulator drive circuit. There was an advantage not to give. However, the number of flow regulators that can be driven by a single flow regulator drive circuit is limited, and as the number of flow regulators required increases and the number of flow regulator drive circuits mounted on the satellite increases, the power supply becomes more limited. Many of them are necessary, and as a result, there are drawbacks such as an increase in the number of parts, an increase in failures due to an increase in parts, and an increase in weight due to the use of many power sources. The original purpose of artificial satellites is to have a long life and to be able to mount many communication devices, but if the above-mentioned drawbacks are not satisfied, it is difficult to fulfill the mission of artificial satellites. Therefore, in the conventional ion engine flow regulator control device, the number of parts and the number of circuits are increased in addition to the increase in power loss, weight, and area used due to the increase in types of power sources with the increase in size of artificial satellites. There was a problem such as a decrease in reliability due to complication.

The present invention has been made to solve the above problems, and can supply a stable power supply voltage to a plurality of flow rate regulator drive circuits connected to one power supply output by using a logical operation circuit. The purpose is to provide a flow controller for an ion engine.

[0006]

[Means for Solving the Problems]

 In this invention, the flow regulator driving signal applied to the flow regulator group causes a voltage drop that changes in various ways according to the change in the load condition of the flow regulator, and the voltage value is used as a feedback signal to perform a logical operation in the satellite. It is fed back to the circuit and the power supply is controlled by a logic operation circuit.

[0007]

[Action]

 In this invention, the voltage value between the input of the flow rate regulator and the ground is input to the logical operation circuit, and an appropriate level amount is fed back to the power supply according to the voltage of the input of the flow rate regulator group that changes with load fluctuation. , Control the output of the power supply to the operating voltage of the flow rate regulator.

[0008]

【Example】

Example 1. Figure 1 is a block diagram showing an embodiment of this invention, 2A～5C and V _B are of identical upper Symbol conventional device. 6 is a power source, 7A to 7C are power source outputs for connecting the power source output end and the first flow rate regulator drive circuit 2A to the third flow rate regulator drive circuit 2C, and 8A to 8C are the first flow rate regulator group 3A. ~ Feedback signal for connecting the third flow rate regulator group 3C and the logic operation circuit, and 10 is a power supply control signal for connecting the logic operation circuit 9 and the power supply 6.

The power supply 6 has a multi-output end, and the flow rate adjuster drive circuits 2A to 2C are connected to the output end, and each flow rate adjuster drive circuit drives a corresponding flow rate adjuster group 3A to 3C. , The voltage change of each of the flow rate regulator groups is detected by the feedback signals 8A to 8C, and the logical operation circuit 9 detects the change of the feedback signals 8A to 8C and feeds back an appropriate level amount to the power source 6 to output the output of the power source 6. Control the flow regulator so that it is at the operating voltage. FIG. 2 shows the inside of the power supply 6 in detail. 2A to 2C and 9 are the same as in FIG. Reference numeral 11 is a pre-regulator, 13A to 13C are first to third filters, S1 is a switch for connecting and disconnecting the output circuit 12 and the first filter 13A, and S2 is an output circuit 12 and the second filter. 13B is a switch for connecting / disconnecting, S 3 is a switch for connecting / disconnecting between the output circuit 12 and the third filter 13C, 14A is a pre-regulator control signal supplied from the logical operation circuit 9 to the pre-regulator 11, 14B Is a control signal for the switch S1, 14C is a control signal for the switch S2, and 14D is a control signal for the switch S3. The pre-regulator control signal 14A from the logic operation circuit 9 optimizes the operation efficiency of the pre-regulator 11 and makes the output of the pre-regulator 11 constant with respect to the change of the bus line V _B. The control signal 14B of the switch S1, the control signal 14C of the switch S2, and the control signal 14D of the switch S3 are input to the flow rate regulator groups 3A, 3B, 3C depending on the load fluctuations of the flow rate regulator groups 3A, 3B, 3C. When the voltage fluctuates, the switches S1, S2, S3 are turned on and off so as to suppress the fluctuation width to a minimum, and the voltage supplied to the flow rate regulator drive circuit is stabilized. When the flow rate regulator group is short-circuited or overloaded, the switches S1, S2, S3 are turned off to stop the voltage supply to the flow rate regulator drive circuits 2A, 2B, 2C and the output of the pre-regulator 11. A preregulator control signal 14A is generated to turn off the signal.

[0010]

[Effect of the device]

 As explained above, the present invention uses a logical operation circuit for a power source, which tends to become more complicated as the size of an artificial satellite increases, and has a control function increased from the conventional one and is simplified as a whole. As a result, a constant flow rate regulator drive signal can be supplied to the flow rate regulator group, and a small flow rate regulator control device having high performance and high reliability can be realized.

[Brief description of drawings]

FIG. 1 is a block diagram showing a flow controller of an ion engine according to an embodiment of the present invention.

FIG. 2 is a block diagram showing the internal details of a power supply that constitutes the present invention.

FIG. 3 is a block diagram showing a flow controller of a conventional ion engine.

[Description of Reference Signs] 2A First flow rate regulator drive circuit 2B Second flow rate regulator drive circuit 2C Third flow rate regulator drive circuit 3A First flow rate regulator group 3B Second flow rate regulator group 3C Flow controller group 3A 5A 1st drive signal 5B 2nd drive signal 5C 3rd drive signal 6 Power supply 7A 1st power supply output 7B 2nd power supply output 7C 3rd power supply output 8A 1st feedback signal 8B 2nd feedback signal 8C 3rd feedback signal 9 Logical operation circuit 10 Power supply control signal V _B bus line

Claims (1)

[Claims for utility model registration] [Claim 1] A plurality of flow rate regulator groups arranged in parallel to inject mercury by adjusting the flow rate of mercury in the satellite-equipped ion engine, and the attitude of the satellite A plurality of flow rate regulator drive circuits that control the opening and closing of the above plurality of flow rate regulator groups so that a fixed surface of the satellite always faces the earth, and are connected in series to the satellite battery and at the output end. A power supply formed by connecting the flow rate regulator drive circuits in parallel; and a logical operation circuit that supplies a power supply control signal to the power source so that the drive signal to the flow rate regulator group becomes a preset flow rate regulator operating voltage. A flow controller for an ion engine, comprising: