Embedded Systems Conference
Breaking News
Comments
Newest First | Oldest First | Threaded View
nhawryluk
User Rank
Author
re: Piezoelectric fans and their application In electronics cooling
nhawryluk   10/25/2011 9:31:00 PM
NO RATINGS
I have seen these work. They are efficient. I would like to have some cubic in of air per $ figures compared to fans. My biggest question is the vibration frequency, resonance and harmonics. What kind/how much structure borne noise is generated. Do these have to be isolated fromt he chassis to prevent SBN transfer?

GREATTerry
User Rank
Author
re: Piezoelectric fans and their application In electronics cooling
GREATTerry   7/5/2011 4:41:59 AM
NO RATINGS
The question is whether such a movement of air can carry heat away from the target better than a rotational fan. More data should be shown. I also agree with katgod that the vibration stuff tends to break over time. How reliable this kind of fan can be?

Gayatri Kumar
User Rank
Author
re: Piezoelectric fans and their application In electronics cooling
Gayatri Kumar   6/12/2011 10:42:35 AM
NO RATINGS
Intresting to know how the sound is suppressed when it is vibrating. Wind is constant motion of air a particular direction. How this back and forth movement is imparting force on air particles in one direction only ?

Bob Lacovara
User Rank
Author
re: Piezoelectric fans and their application In electronics cooling
Bob Lacovara   6/8/2011 4:08:22 PM
NO RATINGS
PZ operated devices aren't new, nor are fan applications. For all sorts of interesting stuff, see the "Measurements Specialties" site. One of the interesting characteristics of piezo materials is that they tend to be voltage-operated. Another is that both "stiff" devices (lithium tantalate) and "flexible" devices (polymer piezo) materials are widely available. Ultrasonic transducers have been made for decades with both types. Now, some questions: how much power per how much air moved? And what is that ratio for a conventional rotating fan? How do they do for weight? Would like to see some numbers.

katgod
User Rank
Author
re: Piezoelectric fans and their application In electronics cooling
katgod   6/8/2011 3:02:59 PM
NO RATINGS
The part that is bending seems destine to break, I wonder what the longest duration for one of these fans with a reasonable output has been?

prabhakar_deosthali
User Rank
Author
re: Piezoelectric fans and their application In electronics cooling
prabhakar_deosthali   6/7/2011 3:12:56 PM
NO RATINGS
This invention, when developed fully may lead to what would be called as static fans, fans without any rotating parts. And that kind of a thing would a revolutionary one , just those pulsating blades of your ceiling or a table fan!

inakito
User Rank
Author
re: Piezoelectric fans and their application In electronics cooling
inakito   6/7/2011 7:12:26 AM
NO RATINGS
It may work but a very smart power consumption of chip to be cooled. Fan shold have a inteligent control (not always on) and an storage energy for fan may be needed.

agk
User Rank
Author
re: Piezoelectric fans and their application In electronics cooling
agk   6/6/2011 11:13:15 AM
NO RATINGS
By reading this article i remember my hand fans. Whenever there is a power cut we use hand fans now and then. This device can replace hand fans if these prove to be highly energy efficient.

_hm
User Rank
Author
re: Piezoelectric fans and their application In electronics cooling
_hm   6/6/2011 3:28:28 AM
NO RATINGS
This is a good concept. But cooling may not be proper application. It may be useful for other applications.



Radio
LATEST ARCHIVED BROADCAST
As data rates begin to move beyond 25 Gbps channels, new problems arise. Getting to 50 Gbps channels might not be possible with the traditional NRZ (2-level) signaling. PAM4 lets data rates double with only a small increase in channel bandwidth by sending two bits per symbol. But, it brings new measurement and analysis problems. Signal integrity sage Ransom Stephens will explain how PAM4 differs from NRZ and what to expect in design, measurement, and signal analysis.

Datasheets.com Parts Search

185 million searchable parts
(please enter a part number or hit search to begin)
Like Us on Facebook
Special Video Section
The LTC®6363 is a low power, low noise, fully differential ...
Vincent Ching, applications engineer at Avago Technologies, ...
The LT®6375 is a unity-gain difference amplifier which ...
The LTC®4015 is a complete synchronous buck controller/ ...
10:35
The LTC®2983 measures a wide variety of temperature sensors ...
The LTC®3886 is a dual PolyPhase DC/DC synchronous ...
The LTC®2348-18 is an 18-bit, low noise 8-channel ...
The LT®3042 is a high performance low dropout linear ...
Chwan-Jye Foo (C.J Foo), product marketing manager for ...
The LT®3752/LT3752-1 are current mode PWM controllers ...
LED lighting is an important feature in today’s and future ...
Active balancing of series connected battery stacks exists ...
After a four-year absence, Infineon returns to Mobile World ...
A laptop’s 65-watt adapter can be made 6 times smaller and ...
An industry network should have device and data security at ...
The LTC2975 is a four-channel PMBus Power System Manager ...
In this video, a new high speed CMOS output comparator ...
The LT8640 is a 42V, 5A synchronous step-down regulator ...
The LTC2000 high-speed DAC has low noise and excellent ...
How do you protect the load and ensure output continues to ...