AN2530 Freescale Semiconductor / Motorola, AN2530 Datasheet - Page 22

• Manufacturer Part Number: AN2530
• Description: Standard Space Vector Modulation with Dead-Time Correction TPU Function Set
• Manufacturer: Freescale Semiconductor / Motorola

AN2530/D
Resolver Reference
Signal for Standard
Space Vector
Modulation with
Dead-Time
Correction
(svmStdDt_res)
22
HSR = 10
HSR = 10
INIT
INIT
Standard Space Vector Modulation with Dead-Time Correction TPU Function Set (svmStdDt)
S1
S1
The svmStdDt_res TPU function uses information read from the svmStdDt
PWM 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
Freescale Semiconductor, Inc.
Figure 12. svmStdDt_sync state diagram
For More Information On This Product,
S2
S2
|move|
Figure 13. 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
MOTOROLA