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參數(shù)資料
| 型號： | DRM010 |
| 英文描述： | Vacuum Cleaner Designer Reference Manual |
| 中文描述： | 吸塵器設(shè)計參考手冊 |
| 文件頁數(shù)： | 25/72頁 |
| 文件大?。?/td> | 1177K |
| 代理商： | DRM010 |
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Vacuum Cleaner Reference Design
Triac Drive Waveform
DRM010 — Rev 0
Designer Reference Manual
MOTOROLA
Vacuum Cleaner Reference Design
For More Information On This Product,
Go to: www.freescale.com
25
measured. The MCU’s ADC requires a 0- to 5-V analog signal.
Accurately measuring the load current would require a very small value
resistor and an operational amplifier with a low input-offset voltage.
Fortunately, the load current is not really needed for most applications.
Assume that the load current will lag the voltage for most inductive loads.
Vacuum cleaner universal motors are highly inductive.
When driving an inductive load, the current will lag the voltage. The triac
does not turn off at zero-voltage crossing. It will continue to conduct for
some degrees until the current passes through zero. As the phase angle
is increased, at some point, the current will become continuous. The
triac will be fired just after zero current crossing. As the phase angle is
increased further, approaching 180
°
, the triac will be fired before current
zero crossing. If a short pulse is used at these angles, the triac will not
conduct over the rest of the cycle, as shown in
Figure 1-9
. The end result
would be that the motor suddenly slows when the speed is turned all the
way up.
Figure 1-9
.
Undesirable Turn Off Using Short Pulse
TRIAC
FIRED
EARLY
TRIAC
TURNS
OFF
SHORT
PULSE
VOLTAGE
CURRENT
F
Freescale Semiconductor, Inc.
n
.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| DRM10 | 功能描述:DIP 開關(guān)/ SIP 開關(guān) BCD 10 POS RoHS:否 制造商:Omron Electronics 位置數(shù)量:10 開關(guān)類型:DIP 執(zhí)行器:Rotary 端子節(jié)距:2.54 mm 觸點形式: 端接類型:Solder Pin 電流額定值:100 mA 電壓額定值 DC: 工作溫度范圍: 安裝:Through Hole |
| DRM1004 | 功能描述:DIP 開關(guān)/ SIP 開關(guān) ROTARY DIP SWITCH PLASTICSHAFT RoHS:否 制造商:Omron Electronics 位置數(shù)量:10 開關(guān)類型:DIP 執(zhí)行器:Rotary 端子節(jié)距:2.54 mm 觸點形式: 端接類型:Solder Pin 電流額定值:100 mA 電壓額定值 DC: 工作溫度范圍: 安裝:Through Hole |
| DRM101 | 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:Blood Pressure Monitor Using the Flexis QE128 Family |
| DRM10C | 功能描述:SWITCH DIP MINI SHAFT 10POS T/H RoHS:否 類別:開關(guān) >> DIP 系列:DR 特色產(chǎn)品:RDM Series Rotary DIP Switch 標(biāo)準(zhǔn)包裝:70 系列:RDM 電路:十六進(jìn)制 位置數(shù):16 觸點額定電壓:0.1A @ 42VDC 觸動器類型:用于工具旋轉(zhuǎn) 觸動器電平:凹槽式 安裝類型:通孔 方向:頂部觸動 可清洗:是 其它名稱:EG4977-5RDMAR16PIT |
| DRM10C04 | 功能描述:編碼式波段開關(guān) SW DIP MINI SHAFT 10POS T/H RoHS:否 制造商:C&K Components 位置數(shù)量:10 輸出代碼:Binary Coded Decimal 執(zhí)行器:Screwdriver 觸點額定值: 端接類型:Solder Pin 封裝:Tube |
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