This means that a suspension with this secondary piezoelectric element control can rapidly and accurately position the head element over the correct data track with much greater precision and speed than a single stage actuation device.ĬTS provides reliable high performance piezoelectric component products to the hard disk drive industry.ĬTS 3203HD, 3241HD and 3195HD high density piezoelectric materials provide the critical electrical and mechanical properties to allow our piezoelectric elements to demonstrate superior performance and reliability in these demanding applications. The stroke at the head element is very short short and the moving mass is small and light enabling the vibrational resonance frequency to be much higher than that of the VCM only controlled actuator. When voltage is applied to the MA, one piezo element expands as the other contracts and causes a slight controlled motion on the order of 20-100 nm of the read-write head. When used in addition to the primary motion provided by the voice coil motor (VCM), piezoelectric ceramic elements provide the benefits of extremely fast response times and overall greater system servo bandwidths than other secondary actuation approaches. Standard CTS recommended piezoelectric materials for buzzers and alerts are 3195STD, 3203STD and 3222HD.ĭisplacements in mechanical hard disk drives are very small and require incredible precision. Reliable piezoelectric buzzer devices are commonly found in applications requiring high reliability such as transportation, computer, security and fire notifications are found. Piezoelectric electric buzzer elements are driven by an oscillating electronic circuit or other audio signal sources. Piezoelectric technology is a cost effective solution in electromechanical acoustic & audio signaling devices. They combine the typical piezo sound with a light signal and thus offer the right warning at the right time.įine more piezoelectric buzzers in our Series M28 as well as the Series T+U.Piezoelectric buzzer technology offers the highest control of audible alert control through its superior fast response time to drive frequency requirements by the application. Piezo buzzers with LED beacons are especially designed for flush mounting. This makes the ESG piezo buzzer the loudest built-in alarm buzzer available on the market.Īuer Signal piezo sounders have a wide voltage range from 8-24 V AC/DC to 150-260 V AC. 1 Regarding the rated current, it's the current the piezo buzzer can handle. The piezo speakers are available in the sizes 30mm, 45mm or 65mm and achieve a maximum sound pressure of 105 dB. The alarm buzzers of the Series M22 have a mounting dimension of 22,5mm (M22) and are therefore suitable for simple, standardized single-hole mounting. Our built-in Series M22 – the Installable – consist of built-in beacons, piezo buzzers and visual-audible combinations. Their small size allows them to be used in applications with very limited space as well as easy mounting (built-in dimension M22). What are the advantages of piezo sounders?ĭespite their small size, piezo sounders achieve an enormous sound pressure, have a low power consumption and are also cost-effective. The buzzer sound produced by these devices is sharp, clear, and attention-grabbing, making them an effective means of signaling in different environments. Piezoelectric buzzers achieve frequencies between 2.000 to 4.000 Hz, low tones can not be generated with this technology. The higher the voltage, the greater the vibration of the piezo crystals. By applying electrical voltage, the crystals on the disk generate vibrations and the buzzer sound is produced. Inside the piezo buzzer is a piezo disk with piezo crystals. Piezo technology is the interaction of mechanical pressure and electrical voltage in solids. A low cost miniature Piezo Buzzer with built in drive circuitry and flying leads. The word „piezo“ is derived from ancient Greek and means to press and was discovered first in 1880 by the brothers Jaque and Pierre Curie on tourmaline crystals. How does the piezo buzzer technology work? Piezo sounders are suitable for audible warning at near distances, but still achieve a sound pressure of up to 105 dB. They are especially used in control cabinets and control technology. The are mostly used when there is only limited space available for the signaling device. Piezo buzzers are among the smallest audible signaling devices.
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