Microchip Technology MA300015 Data Sheet
AN1208
DS01208A-page 10
© 2008 Microchip Technology Inc.
Hardware Setup
CONFIGURING THE dsPICDEM MC1 MOTOR
CONTROL DEVELOPMENT BOARD
CONTROL DEVELOPMENT BOARD
The following steps outline the procedure to set up the
the dsPICDEM
the dsPICDEM
MC1 Development
Board:
1.
Remove the following components:
• R36 and C33 located on the AN3 line
• R39 and C35 located on the AN5 line
• R42 and C37 located on the AN4 line
2.
Connect analog channel AN3 to analog channel
AN6.
AN6.
3.
Connect analog channel AN4 to analog channel
AN11.
AN11.
4.
Connect analog channel AN2 to VR1 on the J6
connector.
connector.
ACCESSING THE HIGH VOLTAGE POWER
MODULE
MODULE
Before removing the lid, the following procedure should
be rigidly followed:
be rigidly followed:
1.
Turn off all power to the system.
2.
Wait a minimum of 3 minutes so that the internal
discharge circuit has reduced the DC bus volt-
age to a safe level. The red LED bus voltage
indicator visible through the top ventilation holes
should not be lit.
discharge circuit has reduced the DC bus volt-
age to a safe level. The red LED bus voltage
indicator visible through the top ventilation holes
should not be lit.
3.
Verify with a voltmeter that discharge has taken
place by checking the potential between the plus
(+) and minus (–) DC terminals of the 7-pin out-
put connector before proceeding. The voltage
should be less than 10V before proceeding to
the next step.
place by checking the potential between the plus
(+) and minus (–) DC terminals of the 7-pin out-
put connector before proceeding. The voltage
should be less than 10V before proceeding to
the next step.
4.
Remove all cables from the system.
5.
Remove the screws fixing the lid to the chassis
and heat sink on the top and bottom.
and heat sink on the top and bottom.
6.
Slide the lid forward while holding the unit by the
heat sink.
heat sink.
7.
After the board is out of the housing, modify the
power module as described in the next section.
power module as described in the next section.
CONFIGURING THE dsPICDEM MC1H HIGH
VOLTAGE POWER MODULE
VOLTAGE POWER MODULE
The following steps outline the procedure to set up the
the board:
the board:
1.
FIGURE 8:
ESTABLISH COMMON
POWER AND DIGITAL
SIGNAL GROUND
POWER AND DIGITAL
SIGNAL GROUND
2.
Connect LK30 to the BUS_SENSE terminal by
using a signal wire.
using a signal wire.
3.
Place 5.6 kOhm resistors on links LK20, LK21,
and LK31, as shown in Figure 9.
and LK31, as shown in Figure 9.
WARNING:
If the voltage is more than 10V,
repeat steps 2 and 3 until the voltage level is less
than 10V. The system is only safe to work on if the
voltage is less than 10V. Failure to heed this
warning could result in bodily harm.
than 10V. The system is only safe to work on if the
voltage is less than 10V. Failure to heed this
warning could result in bodily harm.
AFTER
J13
J5
BEFORE
J5
J13
Because shunt resistors are used to sense current
from the motor, power and digital signals must use
the same ground.
from the motor, power and digital signals must use
the same ground.
Solder a high-current jumper wire (AWG 18
minimum) between J5 and J13.
minimum) between J5 and J13.
Jumper