Microchip Technology DM164130-2 Data Sheet
The BLDC Add-on Board
2012 Microchip Technology Inc.
DS41629A-page 23
FIGURE 2-1:
THE BLDC MOTOR CONTROL ADD-ON ARCHITECTURE
2.3.2
Attaching the Motor
The BLDC add-on kit includes the three-phase 24V ebm-papst motor. This motor can
be attached through a dedicated 28AWG 8-wire ribbon cable using connector J5.
be attached through a dedicated 28AWG 8-wire ribbon cable using connector J5.
FIGURE 2-2:
THE EBM-PAPST MOTOR CONNECTOR
However, you can use your own three-phase BLDC motor by attaching its leads to the
J2 connector. The red connector supplied with the board is designed to accept 22 AWG
wire.
J2 connector. The red connector supplied with the board is designed to accept 22 AWG
wire.
2.3.3
Power-Up
Voltage is supplied through the 2.5 mm jack connector J4, with a maximum rating of
+12 V
+12 V
DC
. The F1 LV Evaluation Platform should be configured to use expansion board
power by inserting the power jumper on J6. See the “F1 LV Evaluation Platform for
Enhanced PIC
Enhanced PIC
®
Microcontrollers User’s Guide” (DS41614A) for more details.
2.3.4
Power Stage
The BLDC add-on incorporates the classic three half-bridges drive made from P and
N-type MOSFETs (for more details, please refer to the BLDC board schematic in
Appendix A. “Board Layout and Schematics”). The maximum current rating is 8A
on each MOSFET. Please keep this in mind when designing your application or
modifying the add-on hardware.
The stage contains six PWM (HU, LU, HV, LV, HW, LW) inputs and three back EMF
sense outputs (VU, VV, VW). The BLDC motor attaches to the three driver outputs (U,
V, W).
N-type MOSFETs (for more details, please refer to the BLDC board schematic in
Appendix A. “Board Layout and Schematics”). The maximum current rating is 8A
on each MOSFET. Please keep this in mind when designing your application or
modifying the add-on hardware.
The stage contains six PWM (HU, LU, HV, LV, HW, LW) inputs and three back EMF
sense outputs (VU, VV, VW). The BLDC motor attaches to the three driver outputs (U,
V, W).
PIC16LF1947
J1
Bipolar
Transistor
Inverter
Q1
Q7
V_MOTOR
R15
J3
V_MOTOR
Vin
Vout
U1
3.3V
_
+
Current meas.
autoshutdown
Q8
Q9
U
V
W
R19
R21
_
+
Scaling
Zero
Cross
Q2
Q3
HU
LU
HV
LV
HW
LW
VU, VV, VW
Motor
+
_