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參數(shù)資料
| 型號： | STK6103 |
| 廠商： | Sanyo Electric Co.,Ltd. |
| 英文描述： | Metalized Polyester Film Radial Lead Capacitor; Capacitance: .22uF; Voltage: 400V; Case Size: 15.5x10.4 mm; Packaging: Bulk |
| 中文描述： | 直流三相無刷電機驅(qū)動器（輸出電流3A） |
| 文件頁數(shù)： | 9/11頁 |
| 文件大?。?/td> | 232K |
| 代理商： | STK6103 |
STK6103
No. 4290- 9/11
Fig.6 Starting Current
Fig.7 Conversion Circuit for Hall IC and Hall Device Signal
Fig.8
Thermal Radiation Design
(1)
Internal average power dissipation Pd
The driver transistors represent the majority of the power dissipation in operation. Other losses are V
2 and
the charge pump circuit. In PWM drive in particular, the diode in the V
1 transistor is being used as a
flywheel diode, increasing V
CC
1 transistor loss. When these are included, internal mean power dissipation is:
Pd = Io (Vst
1
+ V
F
d
2
+ Vst
2
d
1
) + Pd
A
+ Pd
B
+ Pd
C
·······················
Io
: Motor current
Vst
1
: V
1 transistor saturation voltage
Vst
2
: GND transistor saturation voltage
d
1
: GND transistor PWM operation on duty
d
2
: GND transistor PWM operation off duty
Pd
A
: V
2 loss
Pd
B
: Charge pump circuit loss
Pd
C
: GND transistor switching loss
V
F
: V
CC
1 transistor internal diode normal direction voltage
Because the driver transistor is a MOSFET, Vst
1
and Vst
2
will increase with an increase in I
O
or substrate
temperature Tc.
Pd
A
and Pd
B
are generally given as:
Pd
A
≈
V
CC
2
x
I
········································································
Pd
B
≈
V
CC
1
x
(0.49V
CC
1 – 4.2)
x
0.001········································
where, V
CC
1 = 16 to 42V
Refer to Figs. 11 to 14 for data on Vst
1
, Vst
2
, d
1
and V
F
.
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