Atmel 8-bit AVR Microcontrollers AVR430: MC300 Guia do Utilizador descarregar pdf (Página 3)

AVR1607

8311A-AVR-07/10

Figure 2. Model of a BLDC Motor with current flows versus rotor positions

Figure 3. Commutation sequence

Notes :

- Open phase is the one shown with dotted line.

- Hall states are detailed in 2.4 section

2.3 Power Stage

The commutation pattern is controlled with a 3-phase bridge (see Figure 4). The 3

half bridges have 6 power switches (IGBT or MOSFET transistors) which are

switched according to the defined commutation pattern.

Figure 4. 3-phases bridge

1 2 3 4 5 6 7 8 ... 18 19

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Atmel 8-bit AVR Microcontrollers AVR430: MC300 Guia do Utilizador Página 3