Demo Application
3.3
Connecting the Hardware
1. Plug the Motor Drive Booster Pack onto the LaunchPad as shown in
. The terminal block
headers should be oriented towards the USB connector.
2. Connect the 3-phase motor to the terminal block header, J11. The motor connections are labeled A, B,
and C, but can connect in any order.
3. Connect the power supply, which powers the Motor Drive Booster Pack’s DRV8301 3-Phase Pre-
Driver and Drive Stage, to the terminal block header, J2. The connections have been labeled PVDD
and GND. For full performance, ensure the current supply is sufficient for the motor. The Motor Drive
Booster Pack has a designed operating range from 6 to 24 V, up to 10-A RMS (14-A peak).
(1)
4. Enable the power supply.
5. Enable the control algorithm and spin the motor. The BOOSTXL-DRV8301 Booster Pack combined
with a compatible XL LaunchPad provides a complete motor drive and control evaluation platform. The
Piccolo LAUNCHXL-F28027F LaunchPad works with the TI InstaSPIN™ FOC to provide a sensorless
control solution. To get started with
download and run
and review the
LAUNCHXL and BOOSTXL resources.
4
Demo Application
As mentioned previously, the BOOSTXL-DRV8301 Motor Drive Booster Pack is optimized to work with
Piccolo LAUNCHXL-F28027F LaunchPad to provide a complete motor drive and control platform. To
quickly make the 3-phase motors spin, see
sensorless control solution. Multiple projects,
labs, and an easy-to-use GUI are available with MotorWare, available at
http://www.ti.com/tool/motorware
with detailed documentation and user guides.
5
Detailed Hardware Description
The BOOSTXL-DRV8301 Motor Drive Booster Pack is a complete drive stage for a 3-phase application.
This Motor Drive Booster Pack consists of the DRV8301 pre-driver and CSD18533Q5A N-Channel
NexFET™ Power MOSFETs. See the respective data sheets for the
and
for
more information concerning the individual devices.
5.1
DC Bus and Phase Voltage Sense
The Motor Drive Booster Pack is designed with voltage sense circuits on the DC bus (PVDD) and each
half-bridge outputs (phases A, B, and C). These circuits (shown in
) consist of a voltage divider
with a filtering capacitor to reduce high-frequency noise on the ADC pins. These circuits are scaled for
26.314 V, with a filter pole location of 364.692 Hz. The high-side resistors for the phase outputs are
located near the motor output header, J11, whereas the low side resistors and filtering capacitors are
located near the ADC inputs on the Booster Pack to LaunchPad header, J3, for improved noise reduction.
This requirement and the calculations are described in the InstaSPIN™ FOC
in Chapter 5.
Figure 6. Voltage Sense Configuration
(1)
At high currents, the drive stage can increase to high temperatures
6
BOOSTXL-DRV8301 Hardware User's Guide
SLVU974 – October 2013
Copyright © 2013, Texas Instruments Incorporated
