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參數(shù)資料
| 型號(hào)： | KBS-23DA-4A |
| 廠商： | AVX Corporation |
| 文件頁數(shù)： | 16/22頁 |
| 文件大?。?/td> | 0K |
| 描述： | BUZZER PIEZO ELEMENT 4KHZ 23MM |
| 標(biāo)準(zhǔn)包裝： | 100 |
| 系列： | KBS, Kyocera |
| 頻率： | 4kHz |
| 類型： | 標(biāo)準(zhǔn) |
| 阻抗： | 600 歐姆 |
| 電容 @ 頻率： | 12000pF @ 1kHz |
| 尺寸： | 0.91 英寸直徑（23mm） |
| 端子： | 無 |
2
Piezoelectric Acoustic Generators
Piezoelectric Acoustic Generators are available in two types:
1.
Two-terminal type
2.
Three-terminal type
The two-terminal type works when signal voltage is
applied on the metal diaphragm as one electrode and the
conductive-material-screened piezoelectric element as the
other electrode.
The three-terminal type has a split electrode on the
piezoelectric element. When the signal is applied between 2
and 1 in Figure 3, the phase shifted signal will be induced
between 3 and 1 so that it works as a piezoelectric trans-
former. The phase shifted signal can be used as the feedback
component in a simple oscillation circuit which operates
automatically at the natural resonant frequency of the element.
AVX-Kyocera manufactures a wide variety of piezoelectric
acoustic generator elements. These include external drive and
self-oscillating buzzers, beepers, ringers and receivers.
Piezoelectric acoustical transducers are non-mechanical
contact devices and feature the following advantages:
Free from RF noise and contact sparking
Simple, compact and light weight
Consume little power and have long life
Generate various timbres of pitches
Examples of applications are: telephones, watches,
calculators, appliances, automobiles, smoke detectors and a
wide variety of other electronic equipment.
The basic element in all of these is a piezoelectric ceramic
mounted on a metal diaphragm. When AC voltage is applied
across the electrodes of the piezoelectric ceramic it expands
and contracts at the frequency applied. This causes the metal
diaphragm to bend, producing sound waves (Figures 1 and 2).
The metal diaphragm is usually brass or stainless steel
and less than 0.5 mm thick. PZT ceramic material is used as
the piezoelectric element. This element is designed so that the
mechanical resonant frequency matches the frequency of the
driving signal.
In the case of the piezoelectric transducer the shunt
capacitance is larger than that of other resonators. Therefore,
the total impedance is capacitive.
Introduction
Impedance Characteristics
The equivalent circuit of piezoelectric acoustic generators
(2-terminal type) can be explained by the same equivalent
circuit used for quartz crystal resonators and ceramic resona-
tors. The mechanical resonance is shown by the series
resonance circuit of R
0, L0, C0, and its resonant frequency (fr)
is determined as follows:
figure 2
figure 4
figure 3
-
+
-
+
Vibration
Node
Metal Plate
Ceramic
VIBRATION (CERAMIC and DIAPHRAGM)
figure 1
VIBRATION (CERAMIC ONLY)
-
+
Ceramic
2-TERMINAL TYPE
3-TERMINAL TYPE
1
2
1
2
3
EQUIVALENT CIRCUIT
Ro
Lo
Co
Cs
L0 C0
fr
1
2π
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參數(shù)描述 |
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| KBS-27DA-3A | 功能描述:音頻指示器及警報(bào)器 AUDIO BUZZERS RoHS:否 制造商:PUI Audio 產(chǎn)品:Indicators 聲壓級(jí):85 dB 音調(diào):Continuous 頻率:2300 Hz +/- 300 Hz 電壓額定值:5 VDC 電流額定值:30 mA 端接類型: 直徑:12 mm 安裝:Through Hole |
| KBS-27DA-5A | 功能描述:音頻指示器及警報(bào)器 AUDIO BUZZERS RoHS:否 制造商:PUI Audio 產(chǎn)品:Indicators 聲壓級(jí):85 dB 音調(diào):Continuous 頻率:2300 Hz +/- 300 Hz 電壓額定值:5 VDC 電流額定值:30 mA 端接類型: 直徑:12 mm 安裝:Through Hole |
| KBS-27DA-5C-105 | 功能描述:音頻指示器及警報(bào)器 4.6KHz 30V RoHS:否 制造商:PUI Audio 產(chǎn)品:Indicators 聲壓級(jí):85 dB 音調(diào):Continuous 頻率:2300 Hz +/- 300 Hz 電壓額定值:5 VDC 電流額定值:30 mA 端接類型: 直徑:12 mm 安裝:Through Hole |
| KBS-27DA-5C-108 | 功能描述:音頻指示器及警報(bào)器 AUDIO BUZZERS RoHS:否 制造商:PUI Audio 產(chǎn)品:Indicators 聲壓級(jí):85 dB 音調(diào):Continuous 頻率:2300 Hz +/- 300 Hz 電壓額定值:5 VDC 電流額定值:30 mA 端接類型: 直徑:12 mm 安裝:Through Hole |
| KBS-27DA-5C-56 | 功能描述:音頻指示器及警報(bào)器 AUDIO BUZZERS RoHS:否 制造商:PUI Audio 產(chǎn)品:Indicators 聲壓級(jí):85 dB 音調(diào):Continuous 頻率:2300 Hz +/- 300 Hz 電壓額定值:5 VDC 電流額定值:30 mA 端接類型: 直徑:12 mm 安裝:Through Hole |
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