Mitsubishi electric corporation (20240250603). Power Conversion Device simplified abstract

Power Conversion Device

Organization Name

mitsubishi electric corporation

Inventor(s)

Miwako Tanaka of Chiyoda-ku, Tokyo (JP)

Kaho Mukunoki of Chiyoda-ku, Tokyo (JP)

Toshiyuki Fujii of Chiyoda-ku, Tokyo (JP)

Takeshi Kikuchi of Chiyoda-ku, Tokyo (JP)

Tomohiko Tatsumi of Chiyoda-ku, Tokyo (JP)

Takashi Sugiyama of Chuo-ku, Tokyo (JP)

Ryota Okuyama of Chuo-ku, Tokyo (JP)

Power Conversion Device - A simplified explanation of the abstract

This abstract first appeared for US patent application 20240250603 titled 'Power Conversion Device

The patent application describes a power conversion unit with multiple arms, each containing several converter cells connected in cascade, controlled by a converter control unit.

• The converter control unit includes a voltage command value computing unit that calculates an output voltage command value for each arm, and a gate signal generating unit that produces on/off control signals for the switching elements of the converter cells based on the output voltage command value.
• The voltage command value computing unit is designed to adjust the output voltage command value by compensating for the AC vibration component of stored energy in the power storage elements of the converter cells in each arm.

Potential Applications:

• This technology can be applied in various power conversion systems, such as renewable energy systems, electric vehicles, and industrial power supplies.

Problems Solved:

• The technology addresses the need for precise control of power conversion units to optimize efficiency and stability in various applications.

Benefits:

• Improved control accuracy and stability in power conversion systems.
• Enhanced efficiency and performance of renewable energy systems and electric vehicles.

Commercial Applications:

• This technology could be utilized in renewable energy systems, electric vehicle charging stations, and industrial power supply units to enhance performance and efficiency.

Questions about the technology: 1. How does the compensation for the AC vibration component improve the performance of the power conversion unit? 2. What are the potential challenges in implementing this technology in different power conversion systems?

Original Abstract Submitted

a power conversion unit includes a plurality of arms each having a plurality of converter cells connected to each other in cascade. a converter control unit that controls the power conversion unit includes a voltage command value computing unit to compute an output voltage command value for each arm, and a gate signal generating unit to generate an on/off control signal of each switching element of each converter cell in accordance with the output voltage command value. a voltage command value computing unit is configured to generate the output voltage command value with compensation for an ac vibration component, extracted for each arm, of stored energy of power storage elements of a plurality of converter cells included in the arm.