參數(shù)資料
型號： MC1201A-P
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： MC1201A-P
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PDF資料
PDF描述
MC1231A Advanced Brushless Motor Control Chipset
MC1241A Advanced Brushless Motor Control Chipset
MC1251A Advanced Brushless Motor Control Chipset
MC1251A-E Advanced Brushless Motor Control Chipset
MC1401A Advanced Brushless Motor Control Chipset
相關代理商/技術參數(shù)
參數(shù)描述
MC1201F 制造商:Rochester Electronics LLC 功能描述:- Bulk
MC1201L 制造商:Rochester Electronics LLC 功能描述:- Bulk
MC1202 制造商:MOTOROLA 制造商全稱:Motorola, Inc 功能描述:6-INPUT GATES
MC12022 制造商:MOTOROLA 制造商全稱:Motorola, Inc 功能描述:MECL PLL COMPONENTS ±64/65, ±128/129 DUAL MODULUS PRESCALE
MC12022A 制造商:MOTOROLA 制造商全稱:Motorola, Inc 功能描述:1.1GHz Dual Modulus Prescaler
發(fā)布緊急采購，3分鐘左右您將得到回復。

采購需求

(若只采購一條型號，填寫一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購。也可以進入我的后臺，查看報價

發(fā)布成功！您可以繼續(xù)發(fā)布采購。也可以進入我的后臺，查看報價

*型號 *數(shù)量 廠商 批號 封裝
添加更多采購

我的聯(lián)系方式

*
*
*