Improved magnetic latching relay satellite-borne camera power supply system
A technology of magnetic latching relay and power supply system, which is applied in the direction of control/regulation system, instrument, and adjustment of electric variables, etc., which can solve the problems of mutual interference between input and output stages, failure to meet application requirements, and damage of subsequent stages, so as to reduce mutual interference effect
Inactive Publication Date: 2015-06-17
CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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Problems solved by technology
[0003] The present invention solves the problem that the primary power supply of the DC / DC module and the return line of the secondary power supply in the existing space-borne camera equipment are not isolated, causing the input and output stages of the DC / DC module to interfere with each other, which is easy to cause damage to the subsequent stage; and the existing The maximum positive and negative power output of the dual output DC / CDC module is the same, which cannot meet the application requirements of most dual power supplies, where the positive power supply is large and the negative power supply power is small; for different loads on the star, the secondary power supply return line is required for equipotential connection, etc., provided An Improved Spaceborne Camera Power Supply System for Magnetic Latching Relays
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[0017] Specific implementation mode 1. Combination Figure 1 to Figure 3 Describe this embodiment, an improved magnetic latching relay spaceborne camera power supply system, including a fuse, a surge suppressor, an EMI filter and a DC / DC module group, the primary input power is passed through a fuse, a surge suppressor, an EMI The filter and the DC / DC module set supply power to the camera load, and the control circuit inside the main controller of the camera load provides control signals to control the operation of the DC / DC modules in the DC / DC module set. The control circuit includes a capacitor C1 and a resistor R2 , resistor R3, resistor R4, triode Q1 and magnetic latching relay, one end of the internal switch S1 of the magnetic latching relay is connected to the input end of the primary input power supply VCCIN of the DC / DC module through the resistor R2; the other end of the switch S1 is simultaneously connected to the resistor One end of R3, resistor R4 and capacitor C1...
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The invention relates to a satellite-borne camera power supply system, in particular to an improved magnetic latching relay satellite-borne camera power supply system solving the problems that due to the fact that a primary power source return wire and a secondary power source return wire of a DC / DC module of existing satellite-borne camera equipment are not isolated, the input level and the output level of the DC / DC module interfere with each other. A small-power DC / DC is independently adopted to supply power to a magnetic latching relay coil, and the state switching correction of the power supply system is guaranteed. The DC / DC module is directly connected to a power supply circuit, and the surging of the power supply circuit due to connection of the DC / DC after the system is powered on is avoided. A magnetic latching relay is combined with a triode and an RC charging and discharging circuit to carry out isolation control over a working enabling end of the DC / DC. The common ground of the power supply system is limited through the minimum reflux area principle. Two single-output positive voltage DC / DC modules are combined to form a positive and negative double-output DC / DC module with the stable output.
Description
technical field [0001] The invention relates to a power supply system for a spaceborne camera, in particular to an improved power supply system for a spaceborne camera with a magnetic latching relay. Background technique [0002] In order to ensure the reliable operation of the relay switch, the operating voltage deviation of the magnetic latching relay coil is required to be no more than 10%. Simultaneous startup of devices on multiple satellites may cause large fluctuations in the power supply, exceeding the normal operating range of the magnetic latching relay, affecting the life of the relay or causing Relays cannot switch reliably. It is usually necessary to control the output state of the DC / DC module, the reference ground of the control signal is the primary power ground, and the reference ground of the control signal is usually the secondary power ground; the current transmission ratio of the optocoupler device that can achieve isolation control is limited Factors s...
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IPC IPC(8): G05F1/12
Inventor 余达刘金国郭永飞陈佳豫徐东王冶刘妍妍
Owner CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI