03.08.2013 Views

Embedded Software and Motor Control Libraries for PXR40xx

Embedded Software and Motor Control Libraries for PXR40xx

Embedded Software and Motor Control Libraries for PXR40xx

SHOW MORE
SHOW LESS

Create successful ePaper yourself

Turn your PDF publications into a flip-book with our unique Google optimized e-Paper software.

such a vector allows a numerical definition of all possible switching states. In a threephase<br />

power stage configuration (as shown in Figure 4-69), eight possible switching<br />

states (detailed in Figure 4-70) are feasible.<br />

Figure 4-70. Basic space vectors<br />

These states, together with the resulting instantaneous output line-to-line <strong>and</strong> phase<br />

voltages, are listed in Table 4-148.<br />

Table 4-148. Switching patterns<br />

a b c U a U b U c U AB U BC U CA Vector<br />

0 0 0 0 0 0 0 0 0 O 000<br />

1 0 0 2/3*U<br />

DCBus<br />

1 1 0 1/3*U<br />

DCBus<br />

0 1 0 -1/3*U<br />

DCBus<br />

0 1 1 -2/3*U<br />

DCBus<br />

0 0 1 -1/3*U<br />

DCBus<br />

1 0 1 1/3*U<br />

DCBus<br />

-1/3*U<br />

DCBus<br />

1/3*U<br />

DCBus<br />

2/3*U<br />

DCBus<br />

1/3*U<br />

DCBus<br />

-1/3*U<br />

DCBus<br />

-2/3*U<br />

DCBus<br />

-1/3*U<br />

DCBus<br />

-2/3*U<br />

DCBus<br />

-1/3*U<br />

DCBus<br />

1/3*U<br />

DCBus<br />

2/3*U<br />

DCBus<br />

1/3*U<br />

DCBus<br />

Chapter 4 API References<br />

U DCBus 0 -U DCBus U 0<br />

0 U DCBus -U DCBus U 60<br />

-U DCBus U DCBus 0 U 120<br />

-U DCBus 0 U DCBus U 240<br />

0 -U DCBus U DCBus U 300<br />

U DCBus -U DCBus 0 U 360<br />

1 1 1 0 0 0 0 0 0 O 111<br />

The quantities of the direct-u α <strong>and</strong> the quadrature-u β components of the two-phase<br />

orthogonal coordinate system, describing the three-phase stator voltages, are expressed<br />

by the Clarke Trans<strong>for</strong>mation.<br />

<strong>Embedded</strong> <strong>Software</strong> <strong>and</strong> <strong>Motor</strong> <strong>Control</strong> <strong>Libraries</strong> <strong>for</strong> <strong>PXR40xx</strong>, Rev. 1.0<br />

Freescale Semiconductor, Inc. 529

Hooray! Your file is uploaded and ready to be published.

Saved successfully!

Ooh no, something went wrong!