参数资料
| 型号： | DM183021 |
| 厂商： | Microchip Technology |
| 文件页数： | 16/46页 |
| 文件大小： | 0K |
| 描述： | BOARD DEV PICDEM MC LV |
| 标准包装： | 1 |
| 系列： | PICDEM™ |
| 主要目的： | 电源管理，电机控制 |
| 嵌入式： | 否 |
| 已用 IC / 零件： | PIC18F，dsPIC30F |
| 主要属性： | 3 相无刷 DC（BLDC）电机，1A，LIN，SPI，PWM 接口 |
| 次要属性： | 图形用户界面 |
| 已供物品： | 板，软件 |
| 产品目录页面： | 659 (CN2011-ZH PDF) |
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PICDEM? MC LV Development Board
2.3
CONTROL SECTION
Microchip’s PIC18F2431/2331 and many versions of the dsPIC30F DSCs have
specialized hardware peripherals, like the power control PWM, high-speed ADC,
motion control feedback, integrated EEPROM and the power supervisory function, that
are required for efficient motor control. The CD supplied along with the PICDEM MC LV
Development Board has a variety of programs using both PIC18F and dsPIC30F
devices, working in open loop and closed loop, using Hall sensors and in sensorless
operation. Chapter 3. “Getting Started with PIC18FXX31 MCUs” explains the con-
Signal Controllers” explains the control algorithm for dsPIC30F parts.
2.3.1
Controller Sockets
The PICDEM MC LV Development Board has two 28-pin DIP sockets, one each for the
PIC18F2331/2431 MCUs and dsPIC30F2010/3010 DSCs. They are offset to each
other and marked as the “PIC” and “dsPIC” sockets, respectively. When shipped, a
preprogrammed PIC18F2431 is mounted on the “PIC” side of U1. To use the dsPIC
device, the user has to remove the PIC18F from the socket and mount the dsPIC DSC
on the “dsPIC” side of U3.
Apart from the main controller, the control section has protection circuitry, user interface,
Hall sensor interface and Back EMF (BEMF) signal conditioning for sensorless control.
2.3.2
Overcurrent Protection Circuit
A shunt resistor (R26 = 0.1 Ω ) connected in the DC return path converts the combined
three-phase motor current into voltage. This voltage is passed through a low-pass filter
and amplified using an op amp circuit with a gain of 11. This amplified voltage is connected
to one of the Analog-to-Digital Converter channels (AN0). In addition to this, the amplified
voltage is compared to a voltage reference using an op amp comparator. The voltage ref-
erence is set using potentiometer R60. Turning the potentiometer clockwise increases the
reference and counterclockwise reduces the reference. The range of voltage reference
varies from 0V to 3.3V. Based on the motor rated current, the reference can be set. A test
point “MOTOR” is given to monitor the motor current on an oscilloscope.
2.3.3
User Interface
On the PICDEM MC LV Development Board, there are switches, LEDs and a
potentiometer to use with the GUI interface. Table 2-1 describes each function.
TABLE 2-1:
USER INTERFACE
Board Function
Switch
S1
S2 and S3
Description
Used for resetting the system
Various functions
Comments
LED
DS51554B-page 12
D1, D2, D3
PWM0-PWM5
Potentiometer R14
Display status
Display status of PWM0-PWM5
Motor speed control
Turning the potentiometer clockwise
increases the speed and vice versa.
? 2006 Microchip Technology Inc.
相关PDF资料 |
PDF描述 |
|---|---|
| DM183033 | BOARD DEMO INTERNET RADIO |
| DM240314 | BOARD DEV LCD EXPLORER |
| DM240415 | ACCESSORY DEVELOPMENT START KIT |
| DM300004-2 | BOARD DEMO DSPICDEM.NET 2 |
| DM300014 | BOARD DEMO DSPICDEM 1.1 GEN PURP |
相关代理商/技术参数 |
参数描述 |
|---|---|
| DM183022 | 功能描述:开发板和工具包 - PIC / DSPIC PICDEM EXPLORER BRD RoHS:否 制造商:Microchip Technology 产品:Starter Kits 工具用于评估:chipKIT 核心:Uno32 接口类型: 工作电源电压: |
| DM183022 | 制造商:Microchip Technology Inc 功能描述:MICROCONTROLLER DEVELOPMENT TOOL |
| DM183022 | 制造商:Microchip Technology Inc 功能描述:EXPLORER BOARD KIT PICDEM HPC |
| DM183023 | 功能描述:Zigbee/802.15.4开发工具 ZENA Network Analyzer RoHS:否 制造商:Silicon Labs 产品:Development Kits 工具用于评估:EM35x 频率:2.4 GHz 接口类型:USB 工作电源电压: |
| DM183023 | 制造商:Microchip Technology Inc 功能描述:ZENA Network Analyzer |
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