Isolated DC-DC power conversion circuit
AssigneeToyota Jidosha Kabushiki Kaisha
InventorsMasanori Ishigaki, Jongwon Shin
Life of this patent
Estimating the term…
Abstract
A power transfer system includes DC-DC power conversion circuitry that has a first switch and a second switch on either side of a first transformer and a first capacitor and a second capacitor on either side of a second transformer that is connected in parallel with the first transformer. Primary secondary sides of the DC-DC power conversion circuitry are aligned based a direction of power transfer. A quantity of power transfer through the DC-DC power conversion circuitry is determined based on power and voltage characteristics of electrical components. A duty cycle and a switching frequency for the first switch or second switch is determined based on the quantity of power to be transferred. The primary and secondary switches are controlled using switching.
Claims19
A system comprising:
- DC-DC power conversion circuitry including
- a first switch and a second switch on either side of a first transformer, and
- a first capacitor connected in series with a first side of a second transformer and a second capacitor connected in series with a second side of the second transformer, the second transformer being that is connected in parallel with the first transformer with the first and second capacitors therebetween;
- and
- control circuitry configured to
- align a primary side and a secondary side of the DC-DC power conversion circuitry based a direction of power transfer,
- determine a quantity of power transfer through the DC-DC power conversion circuitry based on power and voltage characteristics of electrical components,
- determine a duty cycle and a switching frequency for the first switch or the second switch based on the quantity of power transfer through the DC-DC power conversion circuitry, and
- control switching of the first switch and the second switch.
A method comprising:
- aligning, based on a direction of power transfer, a primary side and a secondary side of DC-DC power conversion circuitry including a first switch and a second switch on either side of a first transformer, a first capacitor connected on a first side of a second transformer, and a second capacitor connected on a second side of the second transformer, the second transformer being connected in parallel with the first transformer with the first and second capacitors therebetween;
- determining a quantity of power transfer through the DC-DC power conversion circuitry based on power and voltage characteristics of electrical components;
- determining a duty cycle and a switching frequency for the first switch or the second switch based on the quantity of power transferred through the DC-DC power conversion circuitry;
- and
- controlling switching of the first switch and the second switch.
A system controller comprising control circuitry configured to:
- align, based on a direction of power transfer, a primary side and a secondary side of DC-DC power conversion circuitry including a first switch and a second switch on either side of a first transformer, a first capacitor connected on a first side of a second transformer, and a second capacitor connected on a second side of the second transformer, the second transformer being connected in parallel with the first transformer with the first and second capacitors therebetween;
- determine a quantity of power transfer through the DC-DC power conversion circuitry based on power and voltage characteristics of electrical components;
- determine a duty cycle and a switching frequency for the first switch or the second switch based on the quantity of power transferred through the DC-DC power conversion circuitry;
- and
- control switching of the first switch and the second switch.
Dependencies are inferred from the claim text.