Impact of new generation power semiconductors using SiC in photovoltaic inverters

“As the demand for photovoltaic power generation increases, the sales volume of photovoltaic inverters is increasing. The mass production effect should help reduce the cost of power semiconductors,” said Tsukamoto Sakamoto, executive director of Japan's Tatsuo Electric Machinery Co., Ltd. and managing power electronics business. Say this.

Photovoltaic inverters are devices that convert the electricity produced by solar panels from direct current to alternating current (DC/AC conversion). In Japan, with the implementation of a fixed price acquisition system for photovoltaic power generation, the installed capacity of photovoltaic power generation is centered on a megawatt-class (MW) class photovoltaic power station, and the installed capacity of photovoltaic power generation presents a “bubble growth” picture. The number of photovoltaic inverters required also increases, and the photovoltaic generation field has created an environment with improved performance and reduced costs.

Tianyuan Motor is the first company in Japan to use SiC diodes in photovoltaic inverters. At the seminar on July 3, “Influence of the Next-Generation Power Semiconductors”, Sakamoto delivered a speech titled “The Practical Application and Expectation of New Devices from the Inverter” to explain the power of inverter companies. The expectations placed on semiconductors.

The company's SiC diode inverters significantly reduce conversion losses by reducing switching losses and conduction losses. Although IGBTs (insulated gate bipolar transistors) are still required to be used in combination, in the future, through the full use of SiC, the estimated loss will be reduced by about 60%.

Sakamoto said that "the use of SiC diodes has not caused a significant increase in costs. If we can use all SiC, the cost may be reduced."

Sakamoto has appealed to power semiconductor developers for devices with a withstand voltage of more than 700V, an on-resistance of less than 25mΩ, and a saturation voltage of more than 14Vds. "We hope to be able to achieve the price of less than 1,000 yen." (Reporter: Takahashi Shizhong, Nikkei Technology)

Feature Hanging key storage box with combination access to keys.
Large key storage compartment holds for house,car,or padlock .
Hangs from doorknob,fence,or just about anywhere

Personalized,adjustable combination lock with 4 dials offers up to 10,00 combination possibilties for optimal security.


  • Put it in a car or mount on wall
  • Storage keys, door cards, and credit cards
  • While moving out, door key can be put in the key box for the next user
  • With shackle advantages: conveniently hangs on door knob, railing or fence

key box

key box1key box2

Shengping Safety Protection Locks Manufactur, create to set up in 1989, is an enterprise specialized in the manufacture of different kinds of locks. We have obtained quality system authentications as ISO9001-2000 International Quality Control System Attestation,and we have obtained self-operation export and import right etc. According to many years of producing and R&D experience, we produce locks more than 100 kinds of specification with different kinds of raw materials & styles. Moreover, we can do customized work as per clients`designs.

Bearing the sense of [quality gets victory", our products are popular in domestic market; and with the fame of our product`s [good quality and best prices", we have increased our export all over the world. Now our product lines are mainly for export.

We tightly hold the quality control system, follow the contract, and keep faith and valued mutual benefit. We sincerely welcome customers home and abroad and our craft brothers to develop and flourish the locks market.

Key Storage Lock Box Storage Key Box

Key Storage Lock Box,Metal Key Storage Box,Digital Key Storage Lock Box,Portable Key Storage Lock Box

Shengping Safety Protection Locks Manufacturer ,