- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄376151 > MC1141A (Electronic Theatre Controls, Inc.) Advanced Brushless Motor Control Chipset PDF資料下載
參數(shù)資料
| 型號： | MC1141A |
| 廠商： | Electronic Theatre Controls, Inc. |
| 英文描述： | Advanced Brushless Motor Control Chipset |
| 中文描述： | 先進的無刷電機控制芯片組 |
| 文件頁數(shù)： | 39/70頁 |
| 文件大?。?/td> | 474K |
| 代理商： | MC1141A |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁第30頁第31頁第32頁第33頁第34頁第35頁第36頁第37頁第38頁當(dāng)前第39頁第40頁第41頁第42頁第43頁第44頁第45頁第46頁第47頁第48頁第49頁第50頁第51頁第52頁第53頁第54頁第55頁第56頁第57頁第58頁第59頁第60頁第61頁第62頁第63頁第64頁第65頁第66頁第67頁第68頁第69頁第70頁
39
The waveformis centered around a value of 0 volts. The magnitude of
the generated waveformis proportional to either the output of the servo
filter or the motor command register (depending on the commutation
mode and motor on/off status).
For example if the chipset is connected to a DAC with output range of -
10 Volts to + 10 Volts and the chipset is set to open loop mode with a
motor command value of 32,767 (which is the maximumallowed value)
than as the motor rotates through a full electrical cycle, a sinusoidal
waveformcentered at 0 volts will be output with a mnimumvoltage of -
10, and a maximumvoltage of +10.
DAC16 Decoding
The digital values output by the chipset to the DAC encode the desired
voltages as a 16-bit digital word. The mnimumvoltage is output as a
digital word value of 0, a voltage of 0 Volts is output as a digital word of
32,768 (dec.), and the maximumpositive voltage is output as a digital
word value of 65,535.
To load each of the four (MC1231A) or two (MC1131A) DACs, the DAC
control pins in combination with the chipset's 16-bit data bus are used.
To load a particular DAC, The DAC address (1 of 4) is output on the
signals DAC16Addr0-1, the 16 bits of DAC data are output on pins
Data0-11 (high 12 bits), as well as DACLow0-3 (low 4 bits), I/OAddr0-3
and DACSlct are high, and I/OWrite is low.
For more information on the DAC signal timng & conditions, see the
Pin Descriptions and timng diagrams section of this manual.
DACs with lower resolution than 16 bits can also be used. To connect
to a DAC with less resolution, the high order bits of the 16-bit data word
should be used. For example, to connect to an 8-bit DAC, bits Data4-
Data11 should be used. The low order 8 bits are written to by the
chipset, but ignored by the DAC circuitry.
PWMDecoding
The PWMoutput mode also outputs a sinusoidal desired voltage
waveformfor each phase, however the method by which these signals
encode the voltage differ substantially fromthe DAC16 digital word.
The PWMoutput mode uses a single signal per output motor phase.
This signal contains a pulse-width encoded representation of the
desired voltage. In this encoding the duty cycle of the waveform
determnes the desired voltage. The PWMcycle has a frequency of
24.5 kHz, with a resolution of 10 bits, or 1/1,024.
The following chart shows the encoding.
1
0
0/1024
(max. neg.
value)
1024/1024
(max. pos.
value)
512/1024
(0 value)
1
0
1
0
An output pulse width of 0 parts per 1,024 represents the maximum
negative voltage, an output pulse width of 512 per 1,024 (50 %)
represents a voltage of 0, and a pulse width of 1,024 per 1,024
represents the maximumpositive voltage.
This PWMscheme has been chosen to allow convenient interfacing to
half bridge type amplifiers by connecting the PWMoutput to a level
shifter circuit , and using this output to drive the high and low side
drivers of the bridge.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| MC1151A | Advanced Brushless Motor Control Chipset |
| MC1151A-E | Advanced Brushless Motor Control Chipset |
| MC1201A | Advanced Brushless Motor Control Chipset |
| MC1201A-P | Advanced Brushless Motor Control Chipset |
| MC1231A | Advanced Brushless Motor Control Chipset |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MC11469 | 制造商:SPC Multicomp 功能描述:Mounting Bracket |
| MC11470 | 制造商:SPC Multicomp 功能描述:Mounting Bracket 制造商:SPC Multicomp 功能描述:MOUNTING BRACKET; Leaded Process Compatible:No; Peak Reflow Compatible (260 C):No; Accessory Type:Bracket; For Use With:Wirewound Resistors ;RoHS Compliant: No |
| MC11471 | 制造商:SPC Multicomp 功能描述: 制造商:PRIVATE LABEL 功能描述:MOUNTING BRACKET, Accessory Type:Bracket, For Use With:Wirewound Resistors, Lead |
| MC11472 | 制造商:PRIVATE LABEL 功能描述:MOUNTING BRACKET, Leaded Process Compatible:No, Peak Reflow Compatible (260 C):N |
| MC114N | 制造商:POSITR 功能描述: |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。