18561526. Power Conversion Device simplified abstract (Mitsubishi Electric Corporation)

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 18561526 titled 'Power Conversion Device

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

• The converter control unit computes output voltage command values for each arm and generates on/off control signals for the switching elements of the converter cells based on these values.
• The voltage command value computing unit compensates for AC vibration components in the stored energy of power storage elements in the converter cells.
• This innovation allows for precise control of the power conversion unit, optimizing its performance and efficiency.
• By compensating for AC vibration components, the unit can operate more effectively in various conditions, enhancing overall stability.
• The technology improves the reliability and accuracy of power conversion processes, making it suitable for a wide range of applications in different industries.

Potential Applications: - Renewable energy systems - Electric vehicles - Industrial power supplies

Problems Solved: - Inefficient power conversion - Lack of precise control in power systems

Benefits: - Enhanced efficiency - Improved stability - Greater reliability

Commercial Applications: Title: Advanced Power Conversion Unit for Renewable Energy Systems This technology can be utilized in renewable energy systems to optimize power conversion processes, increasing overall efficiency and reliability. It has significant implications for the renewable energy industry, offering a more advanced solution for power management.

Questions about the technology: 1. How does the compensation for AC vibration components improve the performance of the power conversion unit? - The compensation helps stabilize the system by accounting for fluctuations in stored energy, leading to more accurate control and enhanced efficiency. 2. What are the key advantages of using a power conversion unit with multiple arms and converter cells connected in cascade? - This configuration allows for better distribution of power and more precise control over the conversion process, resulting in improved overall performance.

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.