tb6539fg TOSHIBA Semiconductor CORPORATION, tb6539fg Datasheet - Page 12

• Manufacturer Part Number: tb6539fg
• Description: 3-phase Full-wave Sine-wave Pwm Brushless Motor Control
• Manufacturer: TOSHIBA Semiconductor CORPORATION

with the triangular wave and a sine-wave PWM signal is generated.
rising (or rising) edges is counted. The counted time is used as the data for the next 60° phase of the
modulation waveform.
item is 1/32 of the time width of the 60° phase of the previous modulation waveform. The modulation
waveform moves forward by this width.
time (1) from HU: ↑ to HW: ↓ . Similarly, data (2)
HW: ↓ to HV: ↑ .
same time width until the next edge occurs.
modulation waveform is reset in synchronization with the rising edge of the HU signal at every electrical
angle of 360°. Thus, when the Hall signal rising edge is off-position or during acceleration or deceleration,
the modulation waveform is non-consecutive at every reset.
In the above diagram, the modulation waveform (1)
If the next edge does not occur after the 32 data items end, the next 32 data items move forward by the
The phases are matched between every rising edge of the HU signal and the modulation waveform. The
The modulation waveform is generated using Hall signals. The modulation waveform is then compared
The time (electrical angle: 60°) from the rising (or falling) edges of the three Hall signals to the next
There are 32 items of data for the 60° phase of the modulation waveform. The time width of one data
S
V
HU
HV
HW
S
S
Sw
U
V
* t = t(1) × 1/32
*t
*t
1
(5)
2
3
4
(6)
5
6
32 data items
(6)’
(1)
(1)’
(1)’
(2)
12
'
moves forward by the 1/32 time width of the time (2) from
(2)’
(3)
30
31
'
’ data moves forward by the 1/32 time width of the
32
(3)’
*HU, HV, HW: Hall signals
TB6539N/NG/F/FG
2007-07-17