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Chapter 10
Motor Control PWM
Inserting Dead Time at H/L Level Output
Dead Time is inserted as delay time when signals are switched. Therefore, dead time is inserted even when PWM
output is switched over to H/L level output. The timing of dead time insertion is shown below.
PWM basic
waveform
PWMxx
NPWMxx
PWM basic
waveform
PWMxx
NPWMxx
X - 26
Operation
H/L level output
from here
Output switching
H/L level output
from here
Figure:10.3.6 Dead Time Insertion Timing at H/L Level Output
ORMDn = 0
H/L level output
PSELxx = 1
NPSELxx = 1
OTLVxx = 1
OTLVNxx = 0
ORMDn = 1
Output switching
H/L level output
PSELxx = 1
NPSELxx = 1
OTLVxx = 1
OTLVNxx = 0
H/L level output
PSELxx = 1
NPSELxx = 1
OTLVxx = 0
OTLVNxx = 1
H/L level output
PSELxx = 1
NPSELxx = 1
OTLVxx = 0
OTLVNxx = 1
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