Power supply for a battery charger
First Claim
1. A power supply for providing an output having an input for receiving a cyclically varying supply voltage, the cyclically varying supply voltage having periodic beginning points, wherein at said beginning points the output changes do not effect supply current, comprising:
- synchronization means for synchronizing with the beginning points of the cyclically varying supply voltage;
a controller means for providing a control setting;
said controller means being responsive to the synchronization means for varying the control setting only at a beginning point, wherein the control setting is maintained constant until a subsequent beginning point; and
an energy control means responsive to the control setting for controlling the output only at the beginning point.
1 Assignment
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Accused Products
Abstract
A power supply (100) includes an energy source (102) which provides cyclically varying supply voltage having periodic repeated beginning points. Generally, the beginning points comprise zero potential points of the cyclically varying supply voltage. The energy source is coupled to an energy control means (106) which is responsive to a control setting for controlling an output (108). A controller (114) provides the control setting in response to a feedback signal received from a sensor (116) only at the beginning points and maintains control of the control setting constant until a subsequent beginning point.
16 Citations
23 Claims
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1. A power supply for providing an output having an input for receiving a cyclically varying supply voltage, the cyclically varying supply voltage having periodic beginning points, wherein at said beginning points the output changes do not effect supply current, comprising:
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synchronization means for synchronizing with the beginning points of the cyclically varying supply voltage; a controller means for providing a control setting;
said controller means being responsive to the synchronization means for varying the control setting only at a beginning point, wherein the control setting is maintained constant until a subsequent beginning point; andan energy control means responsive to the control setting for controlling the output only at the beginning point. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A charger for providing charging current for a battery having an input for receiving a cyclically varying supply voltage, the cyclically varying supply voltage having periodic beginning points, wherein at said beginning points the output changes do not effect supply current, comprising:
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a rectifier means; synchronization means for synchronizing with the beginning points of the cyclically varying supply voltage; a controller for providing a control setting, said controller means being responsive to the synchronization means for varying the control setting only a beginning points, wherein the control setting is maintained constant until a subsequent beginning point; and an energy control means responsive to the control setting for controlling the output only at the beginning point. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23)
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Specification