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Korea Aerospace Research Institute  Promising Technologies for Commercialization

Outline of Technology

TLO of the KARI

Person-in-charge

Senior Administrator Moon-Hee, Cho

E-mail : moonyxp@kari.re.kr
R&D Performance Diffusion Division 

Power supply 
system having an 
emergency power 
supply cutoff 
function

Power Supply Route of Launch Support Test Set

Inventor

Principal Researcher Kwon, Jae-Wook

Team

Spacecraft Control System Department

Status of right

• US : 9537349

Title

• POWER SUPPLy SySTEM HAVING AN EMERGENCy 

POWER SUPPLy CUTOFF FUNCTION 

It is directed to a satellite power supply system 

capable of cutting off the power supply using the 

uninterruptible power supply device even when the 

remote controller is out of order in the emergency.

■ Problems with conventional technology
• When a remote controller inside the LSTS is 
out of order, it is impossible to cut off the pow

-

er supply of the power supply device.

- When an emergency occurs during the launch pro-

cess, it is necessary to cut off the satellite power sup

-

ply or to abort the battery charging process.

- When the power is still supplied to the satellite and 

the satellite battery in the emergency, it can cause a 
serious damage.
►  If the remote controller is broken down, a machine 

with power supply working at far area could not 

be switch off and still would be working on.

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Lab-scale basic performance verification

Technical Readiness Level

TRL 1

TRL 2

TRL 5

TRL 6

TRL 7

TRL 8

TRL 9

TRL 4

Technical features and advantages

TRL 3

Distinctiveness
•  Cutting off the power supply of the power supply device using the uninterruptible power supply 

device even when the remote controller is out of order in the emergency.

Technical effects
•  Capable of autonomously halting the power output when a power output cut-off signal is received 

from the remote place.

Economic effects
•  Capable of reducing satellite maintenance fees by preventing accidents that may be caused when 

power supply is maintained in the emergency.

- Manufacturing a satellite costs about 200 billion KRW, and launching the same costs about 5 

million to 40 million KRW or more.

• In addition to stable power supply, stable cut-off can be implemented.

- Applicable to various industries that make much of power supply and cut-off such as nuclear 

power plants and equipment for controlling hazardous substances.

Technical detail

Constitution of Power Supply Having Emergency Power Supply Cutoff Function

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07

Market and future prospects

Power supply 

system having an 

emergency power 

supply cutoff 

function

2015

104

2016

111

2017

118

2018

126

2019

134

2020

143

Global UPS Market Size

•  As the high-tech manufacturing markets such as data centers 

and semiconductor in addition to satellites expand, there is a 

growing interest of global companies in the UPS market.

•  The global UPS market size grew to about USD 11.1 billion 

USD as of 2016, and is expected to grow to 14.3 billion 

USD by 2020.  Also, it is expected to grow at an average 
annual growth rate (CAGR) of 9.16% from 2017 to 2021.

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Applications

Demand for Technique

Applications

Development of power supply device/manufacturer

Field of launch vehicle power supply device

Field of equipment for controlling hazardous substances

such as nuclear power plant, etc.

Data center

Field of semiconductor