Quick Start GUI
•
DC bus voltage: The measured DC bus voltage displays both digitally and graphically. The on-screen
LED has three states, which depend on whether the DC bus is in or out of range:
–
Yellow: DC bus is less than the minimum value.
–
Green: DC bus is within limits.
–
Red: DC bus is more than the maximum value.
•
Driver over-temperature warning: The state of the DRV830x OCTWn pin displays using an on-screen
LED. The LED has two states:
–
Yellow: The DRV830x device temperature exceeds 130°C.
–
Green: The DRV830x device temperature is lower than 130°C.
Figure 6. GUI Common Controls
4.3.6
Main GUI Tab Controls
The main GUI tab contains controls that vary the motor set points and view various feedbacks.
•
The setpoint knob has a separate function for each control mode.
–
Duty cycle: The knob adjusts the PWM duty cycle to the motor.
–
Current: The knob adjusts the per-unit (PU) commanded current through the motor. Note: The
DRV830x-HC-EVMs have a measurable current range of ±82.5 A which is normalized to a ±1.0 PU
scale.
–
Velocity: The knob adjusts the PU motor-commanded speed.
–
Cascade: The knob adjusts the PU motor-commanded speed.
•
The actual motor speed (RPM) is displayed through a digital display.
•
The actual motor current (PU) is displayed using a linear gauge. The current increases with motor
load.
•
The four graphs on the right display commutation and speed related data. Adjust the time scale of the
top three graphs by incrementing or decrementing the graph time scalar.
–
Top graph: Displays the per-unit (PU) integrated motor flux
–
Second graph: Displays the PU Phase-A BEMF waveform
–
Third graph: Displays the PU Phase-A current waveform
–
Fourth graph: Displays the motor speed in RPM; this graph runs in a continuous strip chart mode
and is not affected by the graph time scalar
•
The flux threshold slider adjusts the commutation point of the motor.
•
The settings tab contains parameters affecting motor start-up and control loop tuning.
7
SLVU983A – September 2013 – Revised October 2013
DRV8303EVM User Guide
Copyright © 2013, Texas Instruments Incorporated