Texas Instruments MCF8315A User Manual

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User's Guide
MCF8315A Tuning Guide
This Tuning guide provided step by step guidence to setup MCF8315EVM, connect MCF8315A GUI to the EVM
and tune a 3-phase Brushless DC motor using MCF8315A.
1 Introduction.............................................................................................................................................................................2
1.1 Hardware and GUI Setup...................................................................................................................................................2
2 Essential Controls..................................................................................................................................................................
2.1 Recommended Default
2.2 Device and Pin Configuration.............................................................................................................................................5
2.3 Control Configuration - Motor Parameters.........................................................................................................................
2.4 Control configuration - Closed
2.5 Testing for Successful Startup into Closed
2.6 Fault Handling....................................................................................................................................................................
3 Basic Controls.......................................................................................................................................................................11
3.1 Device and Pin Configuration...........................................................................................................................................
3.2 System Level Configuration..............................................................................................................................................11
3.3 Control Configurations.....................................................................................................................................................
Figure 1-1. Simplified Schematic of
Figure 1-2. MCF8315EVM Jumper Configuration.......................................................................................................................
Figure 1-3. MCF8315EVM External Configuration......................................................................................................................
Figure 2-1. Fault Status...............................................................................................................................................................
Figure 2-2. Motor Resistance......................................................................................................................................................
Figure 2-3. Motor Inductance.......................................................................................................................................................8
Figure 2-4. Motor BEMF Constant...............................................................................................................................................9
Figure 2-5. Phase Current Waveform Showing a Spike due to Short Circuit............................................................................
Figure 3-1. Phase current and FFT - Dead time compensation disabled..................................................................................
Figure 3-2. Phase current and FFT - Dead time compensation
Figure 3-3. Power Supply voltage and phase current waveform when AVS is
Figure 3-4. Power Supply voltage and phase current waveform when AVS is enabled............................................................
Figure 3-5. MPET - Phase current.............................................................................................................................................14
Figure 3-6. IPD current waveform during Rand L measurement...............................................................................................
Figure 3-7. Reverse Drive Function...........................................................................................................................................15
Table 2-1. Recommended Default
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ABSTRACT

Table of Contents

Values...........................................................................................................................................5
Loop...................................................................................................................................6
Loop................................................................................................................6
List of Figures
MCF8315A..........................................................................................................................2
List of Tables
Values....................................................................................................................................5
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MCF8315A Tuning Guide 1