Microchip Technology dsPICDEM MCHV, Руководство пользователя

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dsPICDEM™ MCHV
DEVELOPMENT SYSTEM
USER’S GUIDE

2009 Microchip Technology Inc. DS70605A-page 27
Chapter 3. Running the Demonstration
This chapter describes the demonstration software that is preloaded on the dsPIC33F
device. This application software, which is based on application note AN984, demon-
strates how to use the dsPICDEM™ MCHV Development System for controlling an AC
induction motor (ACIM). For more information on this application note please refer to
the following Microchip web page: www.microchip.com/dscmotor
To run the demo, follow these basic steps:
1. Connect the system by connecting the AC Induction Motor to the motor
connector.
2. Power up the dsPICDEM™ MCHV Development System by connecting the
power cord to the mains. To verify that the unit is powered, make sure that the
LEDs D6, D13, D17, and D18 are ON. The very first time you connect the system
to any host PC, you should briefly see a popup balloon in the system tray (lower
right of desktop) that states (1) new hardware has been found, (2) drivers are
being installed, and (3) new hardware is ready for use. If you do not see these
messages and the Starter Kit does not work, try reconnecting the USB. If this
does not work, see
Section 2.4.7 “Troubleshooting” .
3. When powered up, the application will turn on the LEDs PWM1L1, PWM1L2 and
PWM1L3.
To use the application, follow these steps:
a) Make sure the PWM OUTPUT shunt jumper is installed.
b) To start/stop the motor, press the switch labeled “PUSHBUTTON”.
c) To increase the motor speed, rotate the potentiometer labeled “POT”
clockwise. To reduce the speed, rotate the potentiometer counterclockwise.
Note: Before making any connection, verify that the system is not powered and it
is fully discharged. The system is completed discharged when the red LED
D13 is off.
Note: The unit is designed to be connected to the AC mains supply via a standard
non-locking plug. As the unit has no mains switch, this plug constitutes the
means of disconnection from the supply. Therefore, the user must have
unobstructed access to this plug during operation.