San Ace Counter Rotating Fan: Industry-leading high static pressure for efficient cooling of high-density equipment

We want to make the power supply smaller and increase its capacity at the same time, but heat builds up inside the device.

Company D, an information and communications equipment manufacturer, was working on developing a new power supply for servers. Mr. I from the Development Technology Department had this to say about the challenges:
"As servers become more compact, there is a demand for smaller power supplies, which are one of the components. To achieve this compact size while maintaining the same power supply capacity, it is necessary to increase the density of the inside. At the same time, in order to maintain a stable output, it has been a development challenge to keep the internal temperature within a specified range while suppressing heat generation from the components. However, the increased density of the equipment makes it difficult for air to pass through the inside, and the current fans, which have weak static pressure, are not able to cool the equipment sufficiently to efficiently exhaust the internal heat."

You want to use a fan with high static pressure, but large vibrations are not permitted.

"Also, servers are equipped with precision components such as hard disks, so large vibrations are not tolerated. Previously, we used high static pressure fans, but the amount of vibration caused problems. When we spoke to the manufacturer, we learned that to maximize the cooling performance of the fans, it is necessary to increase the rotation speed, which is the cause of the vibrations. We would like to use fans with high static pressure, but we want to avoid at all costs the negative effects that vibrations can have on the hard disks." (Mr. I)
Company D needed a fan with even higher static pressure than their current product and continued to search for a fan that met their requirements.

Industry-leading high static pressure fans effectively cool high-density equipment

To solve this problem, Mr. I visited SANYO DENKI CO., LTD. booth at a power supply-related exhibition and consulted with a representative about his problem. After hearing about Mr. I's problem, the SANYO DENKI CO., LTD. representative suggested a new product, the 40mm square "San Ace Counter Rotating Fan."
"I was surprised that, despite its small size of just 40mm square, it had maximum static pressure 1.7 times that of our current fans. I thought that this would be able to efficiently cool the inside of the new power supply model, where the components are densely packed together. Since the development schedule was tight, I wanted to conduct in-house verification as soon as possible." (Mr. I)

After listening to Mr. I's story, the SANYO DENKI CO., LTD. representative provided a sample for evaluation. When the sample was tested at Company D, it was confirmed that, as expected, the inside of the new model of power supply unit could be efficiently cooled.

Improved static pressure while achieving the same level of vibration as current fans

"The proposed fan generated high static pressure while keeping vibration low. Because the rotation speed was nearly 1.5 times faster than the current fan, we were concerned about vibration, but after testing, we confirmed that the vibration level was the same as the current fan, so it would not have a negative effect on the hard disks. The fact that the static pressure was significantly improved while vibration was also kept low was the deciding factor in our decision to adopt it." (Mr. I)

After that, Company D decided to officially adopt the 40mm square San Ace Counter Rotating Fan. "We successfully developed a server power supply that met the demands of compactness and increased capacity. It was well received by the client. Until then, we had almost given up, thinking we would have to choose between static pressure and vibration, but SANYO DENKI CO., LTD. provided us with a sample at the perfect time, which enabled us to meet the development deadline. We are grateful for SANYO DENKI CO., LTD. 's flexible response, and we look forward to consulting with them on various matters in the future." (Mr. I)

For more information about Counter Rotating Fan, please also see "Characteristics of Counter Rotating Fan ".

release date: 2019-04-01 00:00