AN2531/D Motorola / Freescale Semiconductor, AN2531/D Datasheet - Page 22

• Manufacturer Part Number: AN2531/D
• Description: Standard Space Vector Modulation with Dead-Time Correction - XOR version TPU Function Set
• Manufacturer: Motorola / Freescale Semiconductor

AN2531/D
Resolver Reference
Signal for Standard
Space Vector
Modulation with
Dead-Time
Correction – XOR
version
(svmStdDtXor_res)
22
HSR = 10
HSR = 10
INIT
INIT
Standard SVM with Dead-Time Correction – XOR version (svmStdDtXor)
S1
S1
The svmStdDtXor_res TPU function uses information read from the
StdDtXor_R and svmStdDtXor_T functions, the actual PWM center times and
the PWM periods. This allows a signal to be generated, which tracks the
changes of the PWM period and is always synchronized with the PWM. The
resolver reference signal is a 50% duty-cycle signal with a period equal to
prescaler or synchronization channel presc_copy PWM periods (see next
paragraph). The low to high transition of the pulse can be adjusted by a
parameter, either negative or positive, to go a number of TCR1 TPU cycles
before or after the PWM period center time.
move > 0
prescaler = 1
move < 0
prescaler = 2
Figure 9. svmStdDtXor_sync state diagram
Freescale Semiconductor, Inc.
For More Information On This Product,
S2
S2
|move|
Figure 10. Resolver reference signal adjustment examples
center_time
center_time
T
T
Go to: www.freescale.com
|move|
S3
S3
center_time
center_time
center_time
T
T
T
center_time
T
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