18254683. Power Conversion Device simplified abstract (Mitsubishi Electric Corporation)

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Power Conversion Device

Organization Name

Mitsubishi Electric Corporation

Inventor(s)

Takuya Kajiyama of Chiyoda-ku, Tokyo (JP)

Toshiyuki Fujii of Chiyoda-ku, Tokyo (JP)

Shuhei Fujiwara of Chiyoda-ku, Tokyo (JP)

Kazuyori Tahata of Chiyoda-ku, Tokyo (JP)

Power Conversion Device - A simplified explanation of the abstract

This abstract first appeared for US patent application 18254683 titled 'Power Conversion Device

Simplified Explanation

The patent application describes a power conversion device with multiple converter cells, each containing switching elements and a power storage element. It includes a current-limiting resistor, a bypass switch, and a short circuit switch for controlling the flow of AC output current.

  • Each converter cell has input/output terminals, switching elements, and a power storage element.
  • A current-limiting resistor is connected to the path of AC output current.
  • A bypass switch is in parallel with the current-limiting resistor.
  • A short circuit switch can short-circuit the AC line.
  • In a discharge operation mode, the control device allows power conversion operation by controlling the switching elements of the converter cells.

Key Features and Innovation

  • Multiple converter cells with switching elements and power storage elements.
  • Control mechanisms including a current-limiting resistor, bypass switch, and short circuit switch.
  • Discharge operation mode for power conversion.

Potential Applications

This technology can be applied in various power conversion devices, renewable energy systems, and industrial equipment.

Problems Solved

  • Efficient control of AC output current.
  • Enhanced safety features with the short circuit switch.
  • Improved power conversion operation.

Benefits

  • Increased efficiency in power conversion.
  • Enhanced safety measures.
  • Better control of AC output current.

Commercial Applications

Title: Advanced Power Conversion Technology for Renewable Energy Systems This technology can be utilized in solar inverters, wind turbines, and battery storage systems, catering to the growing renewable energy market.

Prior Art

Prior research in power conversion devices and control mechanisms can provide insights into similar technologies.

Frequently Updated Research

Ongoing research in power electronics and renewable energy systems may offer advancements in this technology.

Questions about Power Conversion Technology

1. How does the current-limiting resistor impact the efficiency of the power conversion device? 2. What are the potential safety implications of the short circuit switch in the system?


Original Abstract Submitted

In a power conversion device, each of a plurality of converter cells includes a pair of input/output terminals, a plurality of switching elements, and a power storage element electrically connected to the input/output terminals through the switching elements. A current-limiting resistor is connected to a path of AC output current of the power converter. A bypass switch is connected in parallel with the current-limiting resistor. A short circuit switch short-circuits an AC line between an AC circuit breaker and the current-limiting resistor. In a discharge operation mode, a control device performs power conversion operation by allowing switching of each switching element of each of the converter cells in a state in which the AC circuit breaker and the bypass switch are opened and the short circuit switch is closed.