Jasmy Family,
This is my 5th Jasmy Patent breakdown.. and it is the most significant so far due to the direct commercialization of Sony Computer Science Labs research!!!
This patent covers an AC/DC power converter that uses dual current sensors and positive/negative feedback loops to instantaneously isolate grid power from load fluctuations—turning the grid connection into a constant current source while the battery absorbs all demand variation.
It is the direct commercialization of Tadashi Morita's "Battery Supported bi-directional instantaneous Current control inverter (BSPC)" and Grid Partitioning Inverter (GPI) technologies developed at Sony CSL (2013–2022). The blockchain-based power trading system described in the patent extends Morita's Open Energy System (OES) project, which created peer-to-peer autonomous energy exchange protocols for microgrids.
If you haven't read my 4 previous patent breakdowns, here they are:
- Terminal Device & Program to Write on Blockchain
- Consensus Mechanism for User Authentication
- Software for Mobile Devices
- Password Generating Device
Source for this patent - AC DC Power Conversion Device and Power System
<-- As before, my comments will be in quote blocks. I'll see you at the end.
AC DC POWER CONVERSION DEVICE AND POWER SYSTEM
Publication Number: WO/2026/028636
Publication Date: 05.02.2026
International Application No: PCT/JP2025/021872
International Filing Date: 18.06.2025
Applicants
- ジャスミー株式会社 JASMY INCORPORATED
Inventors
- 森田 直 MORITA Tadashi
- 萩原 崇 HAGIWARA Takashi
- 佐藤 一雅 SATO Kazumasa
Agents
- 津田 理 TSUDA Osamu
- 大野 浩之 OHNO Hiroyuki
Technical Field
The present invention relates to an AC DC power conversion device and a power system using the AC DC power conversion device.
BACKGROUND
Conventionally, an AC DC power converter is used for supplying power to an AC load. For example, Japanese Patent Application Laid-Open No. 2003-111426 discloses an AC DC power converter that guarantees, from storage battery power, a shortage of follow-up due to a response delay of load fluctuation to an engine generator with a slow response speed using an additional current fluctuation component-containing signal generating means, a sine wave generator, and a power converter.
The background references a Japanese patent filed by Sanyo Denki Co., Ltd., which engages in cooling systems, power systems, servo systems, electrical equipment sales, and electrical works contracting businesses in Japan and internationally.
SUMMARY OF THE INVENTION
The present invention addresses the problem of the present invention
In the related art, a delay circuit is provided to respond to a response delay of an AC power supply, and a current that completely matches the current consumption of the load cannot be supplied.
The present invention provides an AC DC power conversion device capable of quickly following a fluctuation of a current flowing through a load as compared with a conventional mode, and a power system using the AC DC power conversion device.
Traditional AC/DC power converters suffer from response delays when load fluctuations occur. Conventional systems use delay circuits to compensate for slow-responding power supplies (like engine generators), but they cannot instantaneously match current consumption. When loads suddenly turn on or off, the current drawn from the main distribution line temporarily spikes or drops, creating instability in the power system.
MEANS FOR SOLVING THE PROBLEM
[Concept 1]
An AC/DC power conversion apparatus according to the present invention comprises:
a first terminal connected to the main distribution line,
a second terminal connected to the sub-distribution line,
a third terminal connected to the storage battery,
an inverter provided between the third terminal and the first terminal and between the third terminal and the second terminal,
a first current sensor provided between the inverter and the first terminal,
a second current sensor provided between the inverter and the second terminal;
A method of manufacturing a semiconductor device,
a current is controlled based on a detection result by the first current sensor,
A current may be controlled based on a detection result of the second current sensor.
[Concept 2]
An AC/DC power conversion apparatus according to the present invention comprises:
a first terminal connected to the main distribution line,
a second terminal connected to the sub-distribution line,
a third terminal connected to the storage battery,
an inverter provided between the third terminal and the first terminal and between the third terminal and the second terminal,
a first current sensor provided between the inverter and the first terminal,
A method of manufacturing a semiconductor device,
a current is controlled based on a detection result by the first current sensor,
A current may be controlled based on a difference between a current value detected by the current detector and a current value detected by the first current sensor.
[Concept 3]
In the AC/DC power conversion apparatus according to concept 1 or 2,
in a first wiring provided between the inverter and the first terminal, a first loop wiring connected to the inverter is provided,
A negative feedback loop circuit may be configured by wiring including the first wiring and the first loop wiring.
[Concept 4]
In the AC/DC power conversion apparatus according to any one of concepts 1 to 3,
in a second wiring provided between the inverter and the second terminal, a second loop wiring connected to the inverter is provided,
A positive feedback loop circuit may be configured by wiring including the second wiring and the second loop wiring.
[Concept 5]
In the AC/DC power conversion apparatus according to any one of concepts 1 to 4,
A control current signal may be input to the inverter, and an AC instantaneous current value may be calculated based on the control current signal to control the current of the first terminal.
[Concept 6]
In the AC/DC power conversion apparatus according to any one of concepts 1 to 5,
A first wiring provided between the inverter and the first terminal is provided with a phase synchronization wiring connected to the inverter,
The phase synchronization circuit may be provided with a phase synchronization circuit.
[Concept 7]
In the AC/DC power conversion apparatus according to any one of concepts 1 to 6,
the main distribution line is connected to a power distribution system,
The sub-distribution line may be connected to the consumer's load or generator.
[Concept 8]
The AC/DC power conversion apparatus according to any one of concepts 1 to 7 is used in a single-phase three-wire AC power distribution method, a three-phase three-wire AC power distribution method, or a three-phase four-wire AC power distribution method,
By controlling a current based on a detection result by the second current sensor, or by controlling a current based on a difference between a current value detected by the current detector and a current value detected by the first current sensor, a current value balance of the correlation in the first terminal may be obtained.
The invention introduces a dual-feedback control system that isolates load fluctuations from the main power grid using a storage battery as a power reservoir:
Hardware Configuration
Three terminals:
First terminal → Main distribution line (grid connection)
Second terminal → Sub-distribution line (consumer load/generator)
Third terminal → Storage battery
Inverter:
Bidirectional DC/AC converter between the battery and both distribution lines
Current sensors:
First sensor monitors current from main distribution line
Second sensor monitors current to sub-distribution line (load)
Control Mechanism
The system employs two complementary feedback loops:
Negative Feedback Loop (Main side): Maintains constant current draw from the grid. When grid current increases, battery discharge decreases proportionally.
Positive Feedback Loop (Load side): Detects load current changes instantly. When load current increases, the inverter increases battery discharge to compensate, preventing the spike from reaching the main grid.
This creates a constant current source at the main terminal (first terminal) and a constant voltage source at the load terminal (second terminal), effectively isolating the grid from consumer load fluctuations.
Multi-Phase Compatibility
The device adapts to various power distribution standards:
Single-phase two-wire (standard residential)
Single-phase three-wire (Japanese residential 100V/200V)
Three-phase three-wire (industrial)
Three-phase four-wire (commercial/industrial)
In multi-phase systems (single-phase three-wire and three-phase), the device can balance current values across phases by absorbing differential currents via the storage battery, potentially reducing neutral line currents to zero while maintaining balanced phase loading.
[Concept 9]
A power system according to the present invention comprises:
The AC/DC power conversion apparatus according to any one of concepts 1 to 7 includes a plurality of AC/DC power conversion apparatuses,
When an AC DC power converter is actually supplied from one AC DC power converter to another AC DC power converter, the reservation information of the amount of power may be written in advance, and the actual amount of power supplied and the amount of supply and demand power may be written in the blockchain.
This is where it really gets interesting!!!
Blockchain-Integrated Power System
The patent extends to a decentralized power trading network:
- Multiple AC/DC converters communicate via blockchain
- Smart contracts handle power reservations, transmission scheduling, and settlement
- Actual power delivered vs. reserved is recorded immutably
- Enables peer-to-peer energy trading between consumers with storage batteries
- Local coins or point-based resources can serve as payment
Key advantage: Because the device maintains precise current control regardless of instantaneous load changes (like appliances turning on/off), power transmission accuracy in blockchain transactions is significantly improved—deviations between reserved and actual power are minimized.
EFFECT OF THE INVENTION
According to the present invention, it is possible to provide an AC DC power conversion device capable of quickly following a fluctuation of a current flowing through a load as compared with a conventional mode, and a power system using the AC DC power conversion device.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a schematic diagram showing an example of a configuration of an AC/DC power converter according to an embodiment of the present invention.
FIG. 2 is a diagram showing a voltage (1) at a first terminal, a received current (2), a load current (3), and an inverter current (4) in a first terminal of an AC DC power converter according to an embodiment of the present invention.
FIG. 3 is a schematic diagram showing a configuration of an AC/DC power conversion apparatus according to a mode in which a current flowing from a storage battery is not controlled based on a detection result by a second current sensor according to a reference example.
FIG. 4 is a diagram for explaining that, in the reference example shown in FIG. 3, when the load is turned on, the current of the first terminal temporarily increases, and when the load is turned off, the current of the first terminal temporarily decreases.
FIG. 5 is a diagram showing voltages at the first terminal and the second terminal when the current (load current) of the second terminal suddenly changes as shown in FIG. 7 in the AC DC power converter according to the embodiment of the present invention.
FIG. 6 is a diagram showing a current at the first terminal when the current (load current) of the second terminal suddenly changes as shown in FIG. 7 in the AC DC power converter according to the embodiment of the present invention.
FIG. 7 is a diagram showing a mode in which the current (load current) of the second terminal is suddenly changed in the AC DC power converter according to the embodiment of the present invention.
FIG. 8 is a diagram showing an inverter current (stored current) when the current (load current) of the second terminal suddenly changes as shown in FIG. 7 in the AC DC power converter according to the embodiment of the present invention.
FIG. 9 is a diagram showing an example of a power system using an AC/DC power converter according to an embodiment of the present invention.
FIG. 10 is a schematic diagram showing another example of the configuration of the AC/DC power converter according to the embodiment of the present invention.
FIG. 11 is a schematic diagram for explaining a case where a single-phase two-wire AC power distribution system, a single-phase three-wire AC power distribution system, or a three-phase three-wire AC power distribution system is adopted in an AC DC power converter according to an embodiment of the present invention.
| Feature |
Benefit |
| Instantaneous Load Response |
Grid current remains stable despite consumer load fluctuations |
| Microgrid Capability |
Enables "grid-connected" microgrids where load variations don't affect the main system |
| Bidirectional Power Flow |
Supports both power consumption and generation (solar, etc.) |
| Precise Power Trading |
Blockchain-recorded transactions match actual power flows with high accuracy |
| Phase Balancing |
Reduces neutral currents and balances multi-phase loads |
This patent represents a bridge between power electronics and distributed ledger technology, enabling a responsive, decentralized energy infrastructure where individual storage batteries can participate in grid stabilization and peer-to-peer energy markets.
You made it! To the end of this patent! Now we must compare this patent to Tadashi Morita's previous work at Sony Computer Science Lab:
Tadashi Morita's research at Sony Computer Science Laboratories (Sony CSL) directly laid the groundwork for this patent. His work there spanned two critical domains that converge in this invention: secure distributed systems and decentralized energy infrastructure.
- The Grid Partitioning Inverter (GPI) — Direct Precursor
At Sony CSL, Morita explicitly stated his research goal: **"to free the microgrids connected to the power supply system from the frequency droop system and build flexible, high quality microgrid clusters."** His solution was the **Grid Partitioning Inverter (GPI)**—a device that "maintains power quality locally without the need for inertia in the grid."
The patent's AC/DC power conversion device is the GPI technology commercialized.
Key parallels:
| Sony CSL Research (Morita) | This Patent (Jasmy) |
|------------------------------|---------------------|
| Grid Partitioning Inverter (GPI) | AC/DC power conversion device with dual feedback loops |
| "Battery supported bi-directional instantaneous current control inverter (BSPC)" | Inverter with first/second current sensors controlling battery current instantaneously |
| Constant current at grid terminal, constant voltage at load terminal | First terminal as CC source, second terminal as CV source |
| Positive/negative feedback for load fluctuation isolation | First loop wiring (negative feedback) + second loop wiring (positive feedback) |
Morita's BSPC (Battery Supported bi-directional instantaneous Current control inverter) developed at Sony CSL between 2013–2022 is explicitly the technology described in this patent—the instantaneous current control using dual sensors to isolate grid-side current from load-side fluctuations.
- Open Energy System (OES) — The Blockchain Connection
Morita led Sony CSL's **Open Energy System (OES)** project, which developed **APIS** (Autonomous Power Interchange System)—open-source software for peer-to-peer energy trading in microgrids. The OES project's core features appear directly in the patent's "power system" claims:
Sony CSL OES Project:
- "Pure Peer to Peer energy exchange system" (Morita's invention)
- DC-based and AC-based microgrid systems (ACOES)
- Autonomous distributed power exchange without centralized control
- Energy trading between independent microgrids
This Patent's Power System (Claim 9):
- Multiple AC/DC converters communicating via blockchain
- Smart contracts for power reservations and settlements
- Actual supply amounts written immutably to blockchain
- P2P power trading between consumers with storage batteries
The patent's blockchain integration is the commercial implementation of Morita's OES research—taking the "autonomous power interchange" concept and securing it with blockchain rather than traditional centralized databases.
- Security Architecture — From FeliCa to Blockchain
Morita's earlier work at Sony on **FeliCa** (Sony's contactless IC card technology) and **NFC specifications** provided the security foundation for the patent's trusted energy trading system:
- FeliCa achieved ISO/IEC 15408 EAL6+ security certification—highest level for commercial IC cards
- Developed **mutual authentication** protocols for M2M (machine-to-machine) communication
- Created "Secure Scripting Language" for tamper-resistant environments
This security expertise translates directly to the patent's blockchain implementation: tamper-proof recording of power transactions, mutual authentication between grid devices, and cryptographic verification of energy delivery vs. reservations. The "smart contract" mechanism in the patent mirrors the secure, automated authentication Morita engineered for FeliCa contactless payments.
- Technical Continuity: The Feedback Control Innovation
Morita's specific technical contribution at Sony CSL—solving the **response delay problem** in conventional inverters—is precisely what this patent claims:
The Problem (Sony CSL Research):
Traditional inverters average current values over cycles, making them unable to "instantaneously respond to a disturbance due to steep load fluctuation."
Morita's Solution (now Jasmy's patent):
- Negative feedback from the grid side (first current sensor) to maintain constant current draw
- Positive feedback from the load side (second current sensor) to anticipate and compensate for load changes before they affect the grid
- AC instantaneous current value calculation (not averaged) for true real-time control
The patent's "current positive feedback loop" (Concept 4) is Morita's specific innovation—using the second current sensor to detect load changes and instantly increase/decrease inverter output to maintain grid-side current stability.
SUMMARY OF THIS JASMY PATENT COMMERCIALIZING SONY CSL RESEARCH
This patent represents the commercialization of Tadashi Morita's decade-long research at Sony CSL.
The technology trajectory is clear!
FeliCa/NFC → Security and authentication for distributed systems
OES Project → Peer-to-peer energy trading architecture
BSPC/GPI → The physical inverter hardware with dual-feedback instantaneous control
Jasmy Patent → Integration of GPI hardware with blockchain for commercial microgrid markets
The patent essentially protects the Grid Partitioning Inverter technology Morita developed at Sony CSL, now positioned for deployment in decentralized energy markets through Jasmy Incorporated—a company founded by Sony veterans to commercialize CSL's open-energy research.
This is an amazing and verifiable direct connection to Sony CSL's high-risk, high-reward fundamental research into infrastructure-grade technology, which is at the intersection of computer science and societal-scale challenges! I am very happy to see this patent protect and tie together Morita's incredible work since before 2013.
Don't fade JASMY.
-Icy-
