Tapped converter
View Patent ↗A converter having a tapped inductor to facilitate controlling operating characteristics of the converter. The converter may be configured as a boost converter with tapping of the inductor at the voltage output and the converter may be configured as a buck converter with tapping of the inductor at the voltage input. The converter may also be configured as a bi-direction dual voltage converter having capabilities to switch between boost and buck modes.
1. A DC/DC converter having a voltage input, diode, switch, capacitor, and voltage output, the converter comprising:
a tapped inductor connected to facilitate controlling a transfer ratio of the converter as a function of a tapping point of the inductor; and
wherein the transfer ratio of the converter is given by the following in equation
V
out
V
in
=
K
(
1
-
δ
)
K
-
δ
wherein Vout corresponds with the voltage output, Vin corresponds with the voltage input, δ correspond with a duty cycle of the switch, and K corresponds with a tapping point of the inductor.
2. The converter of claim 1 wherein the voltage input, diode, switch, voltage output, and tapped inductor are configured to provide an output-to-tap boost converter.
3. The converter of claim 1 wherein the voltage input, diode, switch, voltage output, and tapped inductor are configured to provide a rail-to-tap buck converter.
4. The converter of claim 1 wherein K is given by the following equation:
K
=
N
1
N
1
+
N
2
where N 1 and N 2 are the number of coil turns either side of the tapping point of the tapped inductor.
5. The converter of claim 1 further comprising an additional diode and switch wherein the voltage input, diodes, switches, voltage output, and tapped inductor are configured to provide a bi-directional dual voltage converter.
6. The converter of claim 5 wherein one of the two switches is opened and the duty cycle of the other switch is regulated to provide voltage boost and wherein the other of the two switches is opened and the duty cycle of the other switch is regulated to provide voltage buck.
7. A converter comprising:
a voltage input, diode, switch, capacitor, voltage output, and a tapped inductor arranged in a boost configuration;
wherein the voltage output is connected to tapping point of the inductor; and
wherein the transfer ratio of the converter is given by the following in equation:
V
out
V
in
=
K
(
1
-
δ
)
K
-
δ
wherein Vout corresponds with the voltage output, Vin corresponds with the voltage input, δ corresponds with a duty cycle of the switch, and K corresponds with a tapping point of the inductor.
8. The converter of claim 7 wherein K is given by the following equation:
K
=
N
1
N
1
+
N
2
where N 1 and N 2 are the number of coil turns either side of the tapping point of the tapped inductor.
9. A converter comprising:
a voltage input, diode, switch, capacitor, voltage output, and a tapped inductor arranged in a buck configuration;
wherein the voltage input is connected to tapping point of the inductor; and
wherein the transfer ratio of the converter is given by the following in equation:
V
out
V
in
=
K
(
1
-
δ
)
K
-
δ
wherein Vout corresponds with the voltage output, Vin corresponds with the voltage input, δ corresponds with a duty cycle of the switch, and K corresponds with a tapping point of the inductor.
10. The converter of claim 9 wherein K is given by the following equation:
K
=
N
1
N
1
+
N
2
where N 1 and N 2 are the number of coil turns either side of the tapping point of the tapped inductor.