Application note describing a three‑phase BLDC motor drive using Freescale TWR‑56F8257 and TWR‑MC‑LV3PH boards with Hall‑sensor speed control.
This application note explains the design of a three‑phase brushless DC (BLDC) motor drive built around the Freescale MC56F8257 digital signal controller and the TWR‑MC‑LV3PH low‑voltage power stage. It covers system description, hardware configuration, software architecture, and the use of the FreeMASTER visualization tool for monitoring and tuning.
Key features include Hall‑sensor based speed‑closed loop control, bidirectional rotation, fault protection (over‑voltage, under‑voltage, over‑current), and a user interface via push‑buttons or the FreeMASTER PC software. The document also provides peripheral configuration details and example code snippets.
| Minimum speed | 300 rpm |
|---|---|
| Maximum speed | 4000 rpm |
| Power supply | 24 V DC, 3.7 A |
| Maximum measurable speed (N_MAX) | 5000 rpm |
| QTimer A0 frequency | 468.75 kHz |