Full-digital power controller for satellite

Abstract

The invention discloses a full-digital power controller for a satellite. The full-digital power controller comprises a shunt, a charging controller, a discharging regulator, a balance controller and a central processor based on a DSP (digital signal processor). The power controller adopts a three-region control mode including a shunt region, a charging region and a discharging region, and the three regions are distinguished by using the DSP for sampling bus voltage. The balance controller samples the voltage of each lithium battery through the DSP to realize a balance control algorithm in DSP software so as to realize balance control among the lithium batteries. By the full-digital power controller for the satellite, full-digital control of a satellite power system is realized, a great quantity of hardware circuits, such as MEA (multi-electrode array) circuits and PWM (pulse width modulation) generation circuits are saved, the system integrity is improved, and system reliability is fundamentally and greatly improved.

Description

technical field [0001] The invention relates to a satellite power controller, more precisely, it is a full-digital satellite power controller based on DSP control as the core. Background technique [0002] The satellite power subsystem usually adopts a solar array-battery system and an adjustable DC bus system power supply scheme. During the service life, the power subsystem completes the uninterrupted power supply to the loads of each subsystem on the satellite, including long-term power, short-term power and pyrotechnics. detonation. During the light period, the energy collection of the solar cell array is completed, and the solar energy is converted into electric energy, which supplies power to the load and charges the battery pack. During the shadow period, the battery supplies power to the bus through the discharge regulator or when the load power exceeds the power supply capacity of the solar cell array during the light period. , powered by batteries. [0003] At pre...

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Problems solved by technology

[0007] In order to solve the shortcomings of the existing power controllers such as low integration and complex electronic hardware circuits, the present invention proposes a full-digital power controller for satellites. Using the present invention, the bus voltage can be sampled through DSP, and the shunt Each corresponding tube of the controller, charge controller, and discharge regulator realizes PWM control, samples the charging current of the battery, samples the feedback voltage of the discharge regulator, samples the battery voltage, implements the software of the three-domain control algorithm, and controls the balance The software implementation of the algorithm, the software closed-loop control of the output voltage of the discharge regulator, and the current-limited charging control of the charge controller, etc., greatly reduce the construction of hardware circuits, reduce the use of electronic components, and improve the integration of the system. , also improves the reliability of the system

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