H - Electricity – 02 – M
Patent
H - Electricity
02
M
H02M 7/217 (2006.01) G05F 1/613 (2006.01) H03K 17/082 (2006.01) H03K 17/16 (2006.01)
Patent
CA 2116890
ABSTRACT OF THE DISCLOSURE: A power supply shunt regulator (PSSR) is proposed which regulates the current flowing to a branch (FET, LD, CSR) coupled in parallel to a power supply (SA) and an electrical load (EL). The proposed regulator limits the discharge current from a parasitic capacitor (PSC) of the power supply when a shunt switch included in the branch is turned on. An active negative feedback loop (CLM, FET) therefore regulates the current through the branch by measuring the voltage drop (RI) over a current sensing resistor (CSR) included therein and by deriving a control signal (ACTRL,) for the shunt switch in such a way that this voltage drop strives in a critically damped way to a maximum voltage drop. This can be done in a simple way, taking into account that the shunt switch is chosen to be a field effect transistor, thanks to the fact that an inductor (LD) is coupled to the source of the shunt switch ensuring stable operation. This regulator is particularly well suited for use in spacecrafts where a number of power supply units, in each of which the power supply is constituted by a specific solar array, are used to supply power to the electrical load.
Alcatel Bell-Sdt S.a.
Robic
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