Research on Power Supply Design Optimization and System Stability of Spaceborne SAR

doi:10.16628/j.cnki.2095-8188.2023.07.008

Abstract

Abstract:

The modeling analysis on the secondary load power supply and pulse load of the synthetic aperture radar (SAR) are conducted to meet the requirements of SAR satellite power system features and relatively high stability of the power bus.Meanwhile,the experiment on features of the impedance is carried out on the satellite power DC distributed power supply system.The method is put forward to enhance the stability of the work system.The sytem stability reseach is conducted concerning various load modes.The experiment results are consistent with the theoretical ones,which can show that the power supply system is stable and satisfy the needs SAR satellite payload.

Key words: SAR secondary power supply, pulse load, impedance characteristic, experimental analysis

CLC Number:

TM46

ZHI Shubo, CHEN Si, ZHANG Kun, SI Xueyuan, JI Mingming, WANG Jianping. Research on Power Supply Design Optimization and System Stability of Spaceborne SAR[J]. LOW VOLTAGE APPARATUS, 2023, 0(7): 48-54.

Figures/Tables 18

References 14

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组合	储能电容C_f/μF	阻尼电阻R_f/Ω
组合1	22	0.5
	22	2.0
	22	5.0
组合2	82	0.5
	82	2.0
	82	5.0

组合	C_f/ μF	R_f/ Ω	未接入C_t		接入C_t
组合	C_f/ μF	R_f/ Ω	相位裕度/ (°)	穿越频率/ kHz	相位裕度/ (°)	穿越频率/ kHz
组合 1	22	0.5	-45	5.9	75	1.2
	22	2	22	5.0	78	1.2
	22	5	45 -10	4.0 7.0	78 80	1.2 7.0
组合 2	82	0.5	-10	4.0	78	1.2
	82	2	40	3.2	78	1.2
	82	5	45	3.2	78 60	1.2 7.5

序号	硬件名称	器件参数	器件参数值
1	输入电缆	寄生电感L_s1/μH	12
1	输入电缆	寄生电阻R_s1/mΩ	80
2	EMI滤波器 (未加阻尼)	输入滤波电感L_e/μH	10
2	EMI滤波器 (未加阻尼)	输入滤波电容C_e/μF	20
3	EMI滤波器 (增加阻尼)	输入滤波电感L_e/μH	10
		输入滤波电容C_e/μF	20
		阻尼电容C_e/μF	82
		阻尼电阻R_f/Ω	2

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