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參數(shù)資料
| 型號： | OM9373 |
| 廠商： | International Rectifier |
| 英文描述： | FULL-FEATURED POWER MODULE FOR DIRECT DRIVE OF 3-PHASE BRUSHLESS DC MOTOR |
| 中文描述： | 全功能直接驅(qū)動電源模塊的三相無刷直流電動機 |
| 文件頁數(shù)： | 6/14頁 |
| 文件大?。?/td> | 150K |
| 代理商： | OM9373 |
OM9373
6
www.irf.com
Modes of Operation
Figures 2 and 3, shown on the following pages,
provides schematic representations of typical voltage-
mode and current -mode applications for the OM9373
controller/driver.
Figure 2 represents the implemenation of a typical
voltage-mode controller for velocity control. A voltage
or speed command is applied to the noninverting
input of the error amplifier which is configured as
voltage follower. The ouput of the error amplifier is
compared to a pulse width modulated ramp,and
since motor speed is nearly proportional to the
average phase output voltage, the average speed is
controlled via duty cycle control. If a speed feedback
loop is required, the tachometer output can be
connected to the inverting input of the error amplifier
via a loop compensation network.
Fig 2: Implementation of a Voltage -Mode Controller
C_FILT
232
232
4700pF
.1uF
3.24k
1.50k
1k
.1uF
C_BUS
+
10uF
+
.1uF
10k
Vcc
EA1-
EA2+
1
2
3
VREF
EA2-
5
6
OSCILLATOR
I_SENSE
ISH
ISL
QUAD_SEL
TACH_OUT
10
11
12
13
14
15
PWM_IN
9
EA1_OUT
8
EA1+
4
SOFT_START
GROUND
H3_HALL_INPUT
18
19
20
DIRECTION
CSH
CSL
24
25
26
SPEED_IN
23
EA2_OUT
7
BRAKE
OV_COAST
16
17
V_MOTOR
43
PHASE_A_OUT
PHASE_A_OUT
42
41
SOURCE_A
SOURCE_A
40
39
V_MOTOR
38
PHASE_B_OUT
PHASE_B_OUT
37
36
SOURCE_B
SOURCE_B
35
34
V_MOTOR
33
PHASE_C_OUT
PHASE_C_OUT
32
31
N/C
30
29
SOURCE_C
MOTOR_RETURN28
H1_HALL_INPUT
22
H2_HALL_INPUT
21
H3
H2
H1
H3
H2
H1
V_MOTOR
COMMAND
+15V
HALL SENSORS
FROM MOTOR HALL SENSORS
MOTOR
Figure 2 also shows the implementation of the
cycle-by-cycle current limit/overcurrent protection
feature of the OM9373. The load current is monitored
red via the controller’s internal sense resistor. The
current sense signal is filtered and fed into the current
rent sense amplifier where the absolute value of
ISH-ISL is multiplied by two and biased up by 2.5V
The output of the current sensor amplifier is compared to
a fixed reference, thus providing cycle-by-cycle
current limiting and/or overcurrent protection as
necessary. The typical peak current threshold (ISL-ISH)
is 0.2V; the typical over current threshold (ISH-ISL) is
0.3V.
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| OM9373RF | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Industrial Control IC |
| OM9373SF | 制造商:IRF 制造商全稱:International Rectifier 功能描述:FULL-FEATURED POWER MODULE FOR DIRECT DRIVE OF 3-PHASE BRUSHLESS DC MOTOR |
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| OM9374RF | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Industrial Control IC |
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