# US 11,451,082 B2 · Charge coil unit, power unit, and work machine

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 11,451,082 B2
- Document ID: US11451082B2
- Status: Granted
- Kind: B2
- Application number: 17/209,354
- Filed: 2021-03-23
- Published: 2021-07-08
- Granted: 2022-09-20
- Earliest claimed: 2018-09-26
- Assignees: Honda Motor Co., Ltd.; Zhejiang Fenglong Electric Co., Ltd.
- Applicants: Honda Motor Co., Ltd.; Zhejiang Fenglong Electric Co., Ltd.
- Inventors: Koji Kuriyagawa; Jiang Li; Bin Zhang
- Web page: https://patentgrep.com/patent/US11451082B2

## CPC

- H02J 7/14: for charging batteries from dynamo-electric generators driven at varying speed, e.g. on vehicle
- H02J 7/64: against overvoltage
- A01D 34/6818: {Motor starting mechanisms}
- A01D 2034/6843: {Control levers on the handle of the mower}
- A01D 2101/00: Lawn-mowers
- H02J 2207/20: Charging or discharging characterised by the power electronics converter
- H02J: ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- A01D: HARVESTING; MOWING

## Abstract

A present invention is a charge coil unit, comprising an inductor that generates an induced current based on power of a source of power, a capacitor connected in series to the inductor, and a circuit unit provided to be able to charge the capacitor by the induced current generated in the inductor, thereby, the output voltage of the charge coil unit can be stabilized.

## Claims

### Claim 1

A charge coil unit comprising:
an inductor that generates an induced current based on power of a source of power,
a capacitor connected in series to the inductor, and
a circuit unit provided to be able to charge the capacitor by the induced current generated in the inductor,
wherein the circuit unit is provided such that LC oscillation in a closed loop path formed by the inductor and the capacitor is regulated, and the circuit unit comprises a first rectifier element connected in parallel to the capacitor, and a second rectifier element connected in parallel to the inductor and the capacitor.

### Claim 2 (depends on 1)

The charge coil unit according to claim 1, wherein
a breakdown voltage of the second rectifier element is lower than a breakdown voltage of the first rectifier element.

### Claim 3 (depends on 1)

The charge coil unit according to claim 1, wherein
the second rectifier element is a Zener diode, and configured such that a break down voltage of the Zener diode is lower than a withstand voltage of an output target of the charge coil unit.

### Claim 4 (depends on 1)

The charge coil unit according to claim 1, further comprising:
a connection terminal on a high voltage side, and a connection terminal on a low voltage side,
wherein, of the inductor and the capacitor, the inductor is arranged on the low voltage side, and the capacitor is arranged on the high voltage side.

### Claim 5 (depends on 1)

The charge coil unit according to claim 1, wherein
the capacitor is an electronic component including two terminals of a positive terminal and a negative terminal.

### Claim 6 (depends on 1)

A power unit comprising:
the charge coil unit according to claim 1;
the source of power; and
a flywheel that supports a magnet, and that is arranged to be able to rotate according to the power of the source of power.

### Claim 7 (depends on 6)

A work machine comprising:
the power unit according to claim 6; and
a work mechanism that performs predetermined work by using the power of the source of power.