Freescale Semiconductor, Inc.
Application Note
AN2528/D
Rev. 0, 5/2003
Standard Space Vector
Modulation TPU Function Set
(svmStd)
By Milan Brejl, Ph.D.
Freescale Semiconductor, Inc...
Functional Overview
Standard Space Vector Modulation (svmStd) is a technique that is used to
implement a straightforward method of switching motor windings in
applications such as AC induction motor control and PMSM motor control. The
function set consists of 5 TPU functions:
•
•
•
•
•
Standard Space Vector Modulation – Top (svmStd_top)
Standard Space Vector Modulation – Bottom (svmStd_bottom)
Synchronization Signal for Standard Space Vector Modulation
(svmStd_sync)
Resolver Reference Signal for Standard Space Vector Modulation
(svmStd_res)
Fault Input for Standard Space Vector Modulation (svmStd_fault)
The svmStd_top and svmStd_bottom TPU functions work together to generate
a 6-channel 3-phase center-aligned PWM signal with dead-time between the
top and bottom channels. The Synchronization Signal for the svmStd function
Phase A - top
Phase A - bottom
Phase B - top
Phase B - bottom
Phase C - top
Phase C - bottom
Synchronization signal
Resolver reference signal
Fault (input signal)
1.6 m s
Change of
PW M period
FAU LT !
New
INITIALIZATIO N
Figure 1. Signals generated by svmStd TPU function set
© Freescale Semiconductor, Inc., 2004. All rights reserved.
© Motorola, Inc., 2003
For More Information On This Product,
Go to: www.freescale.com
FREESCALE [ FREESCALE SEMICONDUCTOR, INC ]
