Patent ID: 7777367
Filing Date: 2010-08-17
Classification: B64G,H02J,H02M,Y02E

Abstract:
1. A current controller comprising: a set of ripple regulators capable of receiving current from current sources and supplying a current to a bus, wherein each of the set of ripple regulators has a different set point at which the current is diverted from the bus to form a number of set points; a pulse width modulated regulator capable of receiving a current from another current source and passing the current to the bus, wherein the pulse width modulated regulator has a variable set point used to define a portion of a current source that is shunted away from the bus, wherein the current shunted by the set of ripple regulators and the current shunted by the pulse width modulated regulator form a total shunt current, wherein the variable set point varies as the total shunt current varies, and the number of set points do not vary as the total shunt current varies; and an error generation circuit capable of generating an error control signal, wherein the set of fixed set points and the variable set point may be adjusted by the error control signal.