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参数资料
| 型号： | OM9373 |
| 厂商： | International Rectifier |
| 英文描述： | FULL-FEATURED POWER MODULE FOR DIRECT DRIVE OF 3-PHASE BRUSHLESS DC MOTOR |
| 中文描述： | 全功能直接驱动电源模块的三相无刷直流电动机 |
| 文件页数： | 7/14页 |
| 文件大小： | 150K |
| 代理商： | OM9373 |
www.irf.com
7
OM9373
Figure 3 represents the implementation of a typical
current-mode controller for torque control. The load
current is monitored via the controller’s internal sense
resistor. The current sense signal is filtered and fed
into the current sense amplifier where the absolute
value of ISH-ISL is multiplied by two and biased up by
2.5V. Besides the implementation of the cycle-by-
cycle current limit/overcurrent protection feature of the
OM9373 discussed in the preceding paragraph, the
output of the current sense amplifier is fed into the
error amplifier which is configured as a differential
amplifier. An error signal representing the difference
between the current command input and the value
of the amplified current sense signal is produced.
Then it is compared to a pulse width modulated
ramp and since torque is nearly proportional to the
average phase output current, the torque controlled
via duty cycle control.
C_BUS
+
C_FILT
232
232
4700pF
.1uF
.1uF
10uF
+
.26uF
43k
1800pF
2k
3.24k
3.24k
1k
35.6k
10k
.1uF
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_RETURN
MOTOR_RETURN
28
27
H1_HALL_INPUT
22
H2_HALL_INPUT
21
H3
H2
H1
H3
H2
H1
V_MOTOR
+15V
CURRENT_COMMAND
HALL SENSORS
FROM MOTOR HALL SENSORS
MOTOR
OFFSET
Fig 3: Implementation of a Current-Mode Controller
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PDF描述 |
|---|---|
| OM9373SF | FULL-FEATURED POWER MODULE FOR DIRECT DRIVE OF 3-PHASE BRUSHLESS DC MOTOR |
| OM9373SP | FULL-FEATURED POWER MODULE FOR DIRECT DRIVE OF 3-PHASE BRUSHLESS DC MOTOR |
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相关代理商/技术参数 |
参数描述 |
|---|---|
| OM9373RF | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Industrial Control IC |
| OM9373SF | 制造商:IRF 制造商全称:International Rectifier 功能描述:FULL-FEATURED POWER MODULE FOR DIRECT DRIVE OF 3-PHASE BRUSHLESS DC MOTOR |
| OM9373SP | 制造商:IRF 制造商全称:International Rectifier 功能描述:FULL-FEATURED POWER MODULE FOR DIRECT DRIVE OF 3-PHASE BRUSHLESS DC MOTOR |
| OM9374RF | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Industrial Control IC |
| OM9374SF | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Industrial Control IC |
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