Hardware
2009 Microchip Technology Inc.
DS70605A-page 33
The fast-in connectors PFC_OUT “+” and PFC_OUT “-” provide DC bus voltage to the
Power Module Stage. The recommended cable size is 16-18 AWG or 1.0 to 1.5mm
2
. It
is also recommended that cables used for the power connections should be terminated
with blue or red crimp terminals. If crimp terminals are not used, care should be taken
to ensure that stray strands of wire do not short to adjacent terminals or the enclosure.
If possible, all wires should be stripped and tinned with solder before connecting to the
dsPICDEM MCHV development board terminals.
The 14-pin keyed connector provides the signals and power supply rails from and to
the Power Stage. These signals are shown in Table 4-1.
TABLE 4-1:
14-PIN KEYED CONNECTORS
4.2
POWER MODULE STAGE
This board has two main functions; the first is to control the motor using a dsPIC DSC
and a Power Module and the associated feedback signals for each control algorithm.
The second is to provide the safety means to interact with the user.
4.2.1
Plug-In Module Configuration
This section summarizes the resistor configuration required to connect the PIM pins to
dsPIC DSC pins. The following PIMs can be configured on the dsPICDEM™ MCHV
Development System:
• dsPIC33FJ256MC710 PIM (MA330013)
• dsPIC33FJ12MC202 PIM (MA330014)
• dsPIC33FJ32MC204 PIM (MA330017)
• dsPIC33FJ128MC804 PIM (MA330018)
Note:
The user should only access the power terminals when the system is fully
discharged (see the
on page iii).
Number
Name
Type
1
3.3V, digital rail
Output
2
Not Connected
NC
3
3.3V, analog rail
Output
4
AC input voltage feedback
Output
5
Ground, analog rail
Output
6
AC input current feedback
Output
7
Fault (Overcurrent OR Overvoltage condition)
Output
8
VAC zero crossing signal
Output
9
Ground, digital rail
Output
10
PWM signal for the PFC IGBT
Input
11
Ground, digital rail
Output
12
Not Connected
NC
13
15V
Output
14
Not Connected
NC
Note:
The circuits for the hardware described in this section are shown in
Appendix A. “Board Layout and Schematics”
Note:
When using PIMs, make sure that the 28-pin SOIC dsPIC DSC is removed
from the dsPICDEM™ MCHV Development System.
