Power generation device and method based on time-varying magductance principle

Patent metadata

Field	Value
Publication number	US-12456936-B2
Application number	US-202218249533-A
Country	US
Kind code	B2
Filing date	Jul 27, 2022
Priority date	Jul 15, 2022
Publication date	Oct 28, 2025
Grant date	Oct 28, 2025

Abstract

A power generation device and method based on the time-varying magductance principle relate to the field of energy conversion, and in particular relate to an electromagnetic induction power generation device. The power generation device includes an electric energy generation unit, a power conversion unit and an electric energy storage unit. The electric energy generation unit includes a time-varying magductance component configured to form a closed conductor loop in a magnetic circuit with constant magnetic flux. By changing a magductance parameter of the time-varying magductance component, the time-varying magductance component generates induced current. The power conversion unit consists of a switching device and a circuit. The electric energy generated by the time-varying magductance component can be stored into the electric energy storage unit through controlling the switching device. The time-varying magductance power generation device provided by the present invention provides a new way for electric energy generation.

First claim

What is claimed is:

1. A power generation device based on the time-varying magductance principle, consists of an electric energy generation unit, a power conversion unit and an electric energy storage unit, wherein
the electric energy generation unit comprises a time-varying magductance component configured to form a closed conductor loop in a magnetic circuit with constant magnetic flux, and the time-varying magductance component generates an induced current by changing the magductance parameter of the time-varying magductance component; and
the power conversion unit comprises switching device and a circuit for electric energy transmission; and the electric energy generated by the time-varying magductance component is stored into the electric energy storage unit through controlling the switching device of the power conversion unit.

2. The power generation device based on the time-varying magductance principle according to claim 1 , wherein the time-varying magductance component consists of a multi-turn closed coil.

3. The power generation device based on the time-varying magductance principle according to claim 2 , wherein a physical environment is changed for the time-varying magductance component, the charge linkage in the time-varying magductance component will change, resulting that the magductance parameter of the time-varying magductance component correspondingly changes over time to generate magnetomotive force, namely, induced current.

4. The power generation device based on the time-varying magductance principle according to claim 2 , wherein the time-varying magductance component forms a charge linkage Γ linked with the magnetic circuit with the magnetic flux Φ, Γ=NQ, the direction of the charge linkage Γ and the direction of the magnetic flux Φ conforms to the right-hand screw rule, N is turn number of the closed coil, and Q is moving charges in a single-turn closed coil.

5. The power generation device based on the time-varying magductance principle according to claim 4 , wherein the magductance parameter L of the time-varying magductance component depends on a ratio of the charge linkage Γ linked with the magnetic circuit to the magnetic flux Φ, namely, L=Γ/Φ=NQ/Φ, and under the condition that the magnetic flux in the magnetic circuit keeps constant, when the moving charge number Q in the time-varying magductance component is changed, the magductance parameter of the time-varying magductance component accordingly changes to generate magnetomotive force, namely, induced current.

6. The power generation device based on the time-varying magductance principle according to claim 5 , wherein the magnetomotive force with the time-varying magductance component meets

ℱ
=

N
⁢

d
⁢
Q

d
⁢
t

=

d
⁢
Γ

d
⁢
t

=

ℒ
⁡
(
t
)

⁢

d
⁢

Φ
⁡
(
t
)

d
⁢
t

+

d
⁢

ℒ
⁡
(
t
)

d
⁢
t

⁢

Φ
⁡
(
t
)

.

When the magnetic flux of the magnetic circuit keeps constant, but the magductance parameter of the time-varying magductance component changes over the time, namely, Φ≠0, dΦ/dt=0, dL/dt≠0, and

ℱ
=

d
⁢

ℒ
⁡
(
t
)

d
⁢
t

⁢

Φ
⁡
(
t
)

,

showing that the time-varying magductance component generates magnetomotive force, namely, induced current, due to the variation of magductance parameter with time.

7. The power generation device based on the time-varying magductance principle according to claim 1 , wherein the power conversion unit consists of the switching device and the circuit for electric energy transmission.

8. The power generation device based on the time-varying magductance principle according to claim 1 , wherein the electric energy storage unit is a supercapacitor or another device suitable for fast charging and energy storage.

9. A power generation method based on the time-varying magductance principle, specifically includes:
S1: selecting a magnetic circuit with constant magnetic flux or a space with constant magnetic field;
S2: adding any one power generation device based on the time-varying magductance principle according to claim 1 to the magnetic circuit with constant magnetic flux or the constant magnetic field space, making the magnetic flux of the magnetic circuit link with the time-varying magductance component in the power generation device to form a charge linkage;
S3: changing the charge linkage in the time-varying magductance component, resulting that the magductance parameter changes over the time to generate magnetomotive force, namely, induced current; and
S4: outputting the generated induced current to the electric energy storag

Assignees

• Univ Southeast

Inventors

• Cheng Ming
• Qin Wei
• Zhu Xinkai
• Wang Zheng
• Hua Wei

Classifications

• H02J2207/50

  Charging of capacitors, supercapacitors, ultra-capacitors or double layer capacitors · CPC title

• H02J7/345

  using capacitors as storage or buffering devices · CPC title

• H02K21/00

  Synchronous motors having permanent magnets; Synchronous generators having permanent magnets · CPC title

• H02N11/002 Primary

  Generators · CPC title

• H02K53/00 Primary

  Alleged dynamo-electric perpetua mobilia · CPC title