Back to results
US 9,134,739 B2Granted
Adaptive analog compensator for a power supply
AssigneePowervation Limited
InventorAnthony Kelly
Life of this patent
Estimating the term…
Abstract
The present application is directed at methods of controlling power supplies. In particular the present application employs an analog compensator to control the power stage of the power supply with a digital tuner employed to adaptively tune the operation of the analog compensator.
Claims19
A parametric adaptive controller for a power supply comprising a power stage, the parametric adaptive controller comprising:
- an analog compensator using feedback from an output of the power stage to provide at least one control output to the power stage to maintain the output of the power stage of the power supply at a desired level, wherein the analog compensator is implemented in a circuit and wherein at least one component of the circuit is adjustable to modify a transfer function of the controller in response to a tuning signal, and
- a tuner obtaining at least two signals from the analog compensator or an equivalent circuit of the analog compensator, with a first signal being a feedback error signal comprising a difference between the desired level and the output and a second signal being a signal sensitive to the variance of the feedback error signal, wherein the tuner is at least partially implemented in digital form and is adapted to continuously adjust the at least one circuit component in response to the monitoring of the obtained at least two signals to provide continuous adaptive control of the analog compensator,
- wherein two values are provided to the tuner derived from signals from the analog compensator and each of the two values identifies the sign of a signal derived from the analog compensator, and wherein one or more of the sign of the signal derived from the analog compensator includes no sign corresponding to a region of deadband about zero, or the tuner comprises a multiplier multiplying the sign values to provide a multiplier output.
A power supply comprising:
- an adaptive controller comprising:
- a power stage,
- an analog compensator using feedback from an output of the power stage to provide at least one control output to the power stage to maintain the output of the power stage of the power supply at a desired level, wherein the analog compensator is implemented in a circuit and wherein at least one component of the circuit is adjustable to modify the transfer function of the controller in response to a tuning signal, and
- a tuner obtaining at least two signals from the analog compensator or an equivalent circuit of the analog compensator, with a first signal being a feedback error signal comprising the difference between the desired level and the output and a second signal being a signal sensitive to the variance of the feedback error signal, wherein the tuner is at least partially implemented in digital form and is adapted to continuously adjust the at least one circuit component in response to the monitoring of the derived at least two signals from the analog compensator to provide continuous adaptive control of the analog compensator,
- wherein two values are provided to the tuner derived from signals from the analog compensator and each of the two values identifies the sign of a signal derived from the analog compensator, and wherein one or more of the sign of the signal derived from the analog compensator includes no sign corresponding to a region of deadband about zero, or the tuner comprises a multiplier multiplying the sign values to provide a multiplier output.
2 more elements
A controller for a power supply, the controller comprising:
- an analog compensator for providing a control signal to at least one circuit of the power supply to maintain the output of the power supply at a set-point, wherein the analog compensator includes at least one adjustable component which may be adjusted to alter the transfer function of the analog compensator, and
- a tuner for adjusting the adjustable component to tune the operation of the analog compensator, wherein the tuner is responsive to at least two signals from within the analog compensator, wherein the tuner is responsive to sign changes in each of the signals, and wherein two values are provided to the tuner derived from signals from the analog compensator and each of the two values identifies the sign of a signal derived from the analog compensator, and wherein the sign of the signal derived from the analog compensator includes no sign corresponding to a region of deadband about zero.
A controller for a power supply, the controller comprising:
- an analog compensator for providing a control signal to the power supply, the analog compensator comprising at least one component for adjusting the transfer function of the analog compensator, and
- a circuit providing a digital model of the analog compensator, wherein at least one measurement from within the digital model is employed to adjust the at least one component of the analog compensator, and wherein two values are provided to the circuit derived from signals from the analog compensator and each of the two values identifies the sign of a signal derived from the analog compensator, and wherein the sign of the signal derived from the analog compensator includes no sign corresponding to a region of deadband about zero.
Dependencies are inferred from the claim text.