Company O is a manufacturer and seller of security-related equipment, including security cameras. The company had recently embarked on the development of a high-quality full HD security camera system for outdoor installation, but had some issues with heat management inside the device. T, the leader of Company O's design and development team, said the following:
"The new camera system we were developing was equipped with a high-performance image processing engine, which caused the inside of the device to get quite hot. At first, we considered using a fan with a high airflow rate, but the high rotation speed caused vibrations and blurred the images. A fan with a lower rotation speed reduced the vibrations, but the airflow was insufficient to reduce the heat." (Mr. T)
Mr. T was in a difficult position and continued to gather information in his search for a fan with high airflow and low vibration.
As Mr. T continued to gather information, he became interested in the fan's "PWM control" function.
"We found that if the fan had PWM control function, we could control the fan speed by inputting a pulse signal. We hoped that this function would also solve the issue of noise. Because the security camera system would be operated outdoors 24 hours a day, we thought that we could reduce the fan speed at night, when the temperature is relatively low, to suppress noise. We therefore considered developing a PWM control circuit in-house, but the man-hours required to design a new board and the evaluation period were longer than we expected, so we gave up on the idea." (Mr. T)
Mr. T continued to gather information and found a solution to these issues by consulting a sales representative at SANYO DENKI CO., LTD..
"When we first asked about the vibration of the fan, we were told that we could reduce the vibration simply by switching to a SANYO DENKI CO., LTD. fan. We were interested to hear the specific details, such as how they achieved low vibration through structural innovations that reduce vibration and balancing during the manufacturing process, as well as high assembly precision. Security camera systems are equipped with components that are sensitive to heat, so cooling fans play a very important role. We had been very concerned about the balance between image quality and performance in the product we were developing, but we expected that SANYO DENKI CO., LTD. 's DC Cooling Fan would provide sufficient cooling performance and overcome the vibration issues." (Mr. T)
Additionally, because the proposed fan had PWM control function, we consulted about developing a controller circuit, which we had initially given up on, and a SANYO DENKI CO., LTD. sales representative suggested a board-type "PWM Controller."
"I was surprised at how easy it is to use the San Ace PWM Controller, just by connecting it to a fan. A temperature sensor called a thermistor automatically controls the fan speed according to the detected temperature inside the device, reducing noise by an additional 30db at night when more airflow is not needed," said Mr. T.
Thus, after an internal evaluation, Company O decided to officially adopt SANYO DENKI CO., LTD. 's DC Cooling Fan and board-type PWM Controller.
"By adjusting the rotation speed to suit our needs, we were able to cut power consumption to one-fifth, which enabled us to develop a high-quality security camera system that is not only low-vibration and low-noise, but also has energy-saving performance. Thanks to the proposal that met our requirements, we were able to develop a device with performance that exceeded our expectations. We are very grateful.
"The demands on security equipment are becoming more and more sophisticated, and the competition in development is likely to intensify in the future. We look forward to SANYO DENKI CO., LTD. providing us with optimal proposals in the future." (Mr. T)
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