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| 型號(hào)： | UC3633J |
| 英文描述： | DMOS driver for bipolar stepper motor |
| 中文描述： | 鎖相環(huán) |
| 文件頁(yè)數(shù)： | 7/8頁(yè) |
| 文件大?。?/td> | 588K |
| 代理商： | UC3633J |
Design Example
UC1633
UC2633
UC3633
Bode Plots - Design Example Open Loop Response
1.) K
LF
(s)
K
RF
(s)
2.*) N
K
φ
G
PD
K
T
s
2
J
3.) Combined Overall Open Loop Response
Where:
K
LF
(s) = Loop Filter Response
K
RF
(s) = Reference Filter Response
N = 4 (Using Double Edge Sensing With 4 Pole
Motor)
K
φ
= Phase Detector Gain (.4V/RAD)
G
PD
= Power Stage Transductance (1A/V)
K
T
= Motor Torque Constant (.022NM/A)
J = Motor Moment of Inertia (.0015NM/A - SEC
2
)
s = 2
π
jf
*Note: For a current mode driver the electrical time constant, L
M
/ R
M,
of the motor does not enter into the small signal response.
If a voltage mode drive scheme is used, then the asymptote, plotted as
2
above, can be approximated by:
if: R
M
> K
T
√
N
K
φ
K
PD
K
T
s
2
J
R
M
L
M
J
and,
K
T
2
2
π
J
R
M
< f<
R
M
2
π
L
M
Here: K
PD
= Voltage gain of Driver Stage
R
M
= Motor Winding Resistance
L
M
= Motor Winding Inductance
APPLICATION AND OPERATION INFORMATION
UNITRODE CORPORATION
7 CONTINENTAL BLVD.
MERRIMACK, NH 03054
TEL. (603) 424-2410
FAX (603) 424-3460
7
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