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參數(shù)資料
| 型號： | DRM011 |
| 英文描述： | Direct Current Ignition Reference Design Designer Reference Manual |
| 中文描述： | 直流點火參考設(shè)計設(shè)計參考手冊 |
| 文件頁數(shù)： | 31/72頁 |
| 文件大?。?/td> | 1177K |
| 代理商： | DRM011 |
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Vacuum Cleaner Reference Design
Interrupt Timing
DRM010 — Rev 0
Designer Reference Manual
MOTOROLA
Vacuum Cleaner Reference Design
For More Information On This Product,
Go to: www.freescale.com
31
some uncertainty. The bottom and top range of the potentiometer setting
should provide zero and full-speed operation. Saturation is provided to
compensate for this requirement.
The ADC value is scaled to obtain the desired 0
°
to 180
°
range. The ADC
reading is multiplied by 180, then divided by 255. The HC08 is capable
of performing an 8 by 8 multiply and a 16 by 8 divide efficiently. Inline
assembler functions are used to access the HC08 math functions
directly, resulting in fast and efficient code. Most ANSI C compilers
(American Standard Code for Information Exchange) will promote both
operands to 16-bit integers before performing a multiply or divide. This
results in inefficient code when using 8-bit unsigned char variables.
An integral controller is used to provide soft-starting and a smooth ramp
in the motor speed. Slowly, the controller will increment the output phase
until it reaches the desired speed setting. This will limit the motor current
during starting. When the desired speed is modified by changing the
potentiometer setting, the speed will smoothly ramp to the new setting.
The integrate function provides a simple integral controller. The
integrator output is stored in a static variable called PhaseI. This variable
is incremented or decremented depending on the input variable. The
integrator update rate determines how fast the integrator will ramp the
output.
The saturate function compensates for the characteristics of the
potentiometer and the desired output phase. If the input is less than 5
°
,
the output will be rounded down to 0
°
. If the input is greater than 175
°
, it
will be rounded up to 180
°
. The saturation is placed after the integrator
to provide saturation to the output phase.
1.10 Interrupt Timing
The input capture always occurs at the zero crossing. Normally, the
MCU should be idle at this time. The timing of the output compare
interrupt service routine is variable and depends on the phase angle and
the width of the triac pulse. If the phase angle is small, a short pulse is
used, and the output compare function is called twice in rapid
F
Freescale Semiconductor, Inc.
n
.
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參數(shù)描述 |
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| 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 |
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| 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 標準包裝:70 系列:RDM 電路:十六進制 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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