US 10,594,220 B2 · Power supply device and method for controlling power supply device

Abstract

A chopper section of a power supply device includes a plurality of step-down chopper circuits, and multiphase control of the step-down chopper circuits is performed using gate signals having phases displaced from each other. This shortens the period with which output signals of the step-down chopper circuits are changed. Shortening the period reduces the amount of jitter resulting from a gap between the occurrence of a command signal and a sampling point that is a point in time at which a gate signal is generated. The number of phases of the gate signals equals the number of phases of the step-down chopper circuits. The control of the gate signal generator is asynchronous to feedback control by the controller. Points in time (sampling points) at which gate signals are generated are points in time of generation (sampling points) after a point in time at which the controller calculates a manipulated value.

Claims7

Dependent claims

A power supply device having variable output voltage, the power supply device comprising:

a multiphase chopper section including step-down chopper circuits of a plurality of phases connected in parallel;
a controller for calculating a manipulated value for controlling the chopper section from a feedback signal outputted from the chopper section and a command signal;
and
a gate signal generator for generating gate signals for performing multiphase control of turning on/off of switching elements included in the step-down chopper circuits of the respective phases based on the manipulated value in phases displaced from each other, wherein
the number of phases of the gate signals equals the number of phases of the step-down chopper circuits, and
in the gate signal generator,
gate signals are generated with the same sampling period for the respective phases by sampling synchronous with generation of the gate signals and asynchronous to the command signal, and
sampling points at which the gate signals are generated are sampling points after a point in time at which the controller calculates the manipulated value.

5 more elements

A method for controlling a power supply device, the method capable of changing output voltage based on a command signal by feedback control of a multiphase chopper section including a plurality of step-down chopper circuits connected in parallel, the method comprising:

a gate signal generation step for generating gate signals for performing multiphase control of turning on/off of switching elements included in the step-down chopper circuits of the respective phases based on a manipulated value of the feedback control in phases displaced from each other, by sampling performed with the same sampling period for the respective phases, wherein
the gate signal generation step includes
a pulse width modulation step for generating gate signals having pulse widths according to the manipulated value for the respective phases, and
a phase adjustment step for performing phase adjustment in which phases of the gate signals of the respective phases are staggered by a phase difference obtained by dividing the sampling period by the number of phases, and
the sampling is synchronous with generation of the gate signals and asynchronous to the command signal.

2 more elements

Dependencies are inferred from the claim text.

Power supply device and method for controlling power supply device

Life of this patent

Power supply device and method for controlling power supply device

Life of this patent

Abstract

Claims7