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參數(shù)資料
| 型號： | DRM020 |
| 英文描述： | 3-Phase AC Induction Motor Drive with Tachogenerator Using MC68HD908MR32 |
| 中文描述： | 三相交流感應(yīng)電機(jī)驅(qū)動器，帶測速發(fā)電機(jī)使用MC68HD908MR32 |
| 文件頁數(shù)： | 38/66頁 |
| 文件大?。?/td> | 1157K |
| 代理商： | DRM020 |
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Software Design
Designer Reference Manual
DRM020 — Rev 0
38
Software Design
MOTOROLA
4.3.6 PWM Generation
This process generates a system of three phase sinewaves (or
sinewaves with addition of third harmonic component) shifted 120
o
each
other.
The calculation is based on the wave table stored in ROM of the
microcontroller. The table describes either a pure sinewave or sinewave
with third harmonic addition. The second case is often preferred
because it allows to generate a first harmonic sine voltage equal to the
input AC line voltage. Because of sine symmetry only one quadrant of
the wave period is stored in the table. The wave values for other
quadrants are calculated from the first one. The format of the stored
wave table data is from
#0x00
(for ZERO Voltage) up to PWM
Modulus/2 (for the 100% Voltage). Thus the proper data scaling is
secured.
It is important to note that 50% PWM (or 50% of PWM Modulus loaded
to the corresponding PVAL registers) corresponds to the ZERO phase
voltage. But in the wave table, the ZERO phase voltage corresponds to
the number
#0x00
. Therefore, the fetched wave value from the table
must be added to the 50% PWM Modulation for quadrant 1 and 2 or
substracted from the 50% PWM Modulation for quadrant 3 and 4 (see
point 5 of the process description). Thus the correct PWM value is
loaded.
The input parameters of the process are:
The table increment,
Table_inc,
that is used for the wave
pointer update
Amplitude,
Amplitude,
of the generated inverter voltage
The output parameters of the process are:
PWM value for phase A: PVAL1 register
PWM value for phase B: PVAL3 register
PWM value for phase C: PVAL5 register
F
Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
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(diǎn)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(diǎn)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(diǎn)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(diǎn)額定值: 端接類型:Solder Pin 封裝:Tube |
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