OM506 Просмотр технического описания (PDF) - Omnirel Corp => IRF
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OM506 Datasheet PDF : 7 Pages
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OMC506
Table 1 - Commutation Truth Table
2.1
120o
SA SB SC
10
0
11
0
01
0
01
1
00
1
10
1
10
0
11
0
01
0
01
1
Inputs
F/R
Enable
1
1
1
1
1
1
1
1
1
1
1
1
0
1
0
1
0
1
0
1
00
1
0
1
10
1
0
1
11
1
X
X
00
0
X
X
11
1
X
X
00 X
X
1
VV V
X
1
VV V
X
0
VV V
X
0
Notes:
1.) Invalid Sensor Inputs; X = Don’t Care
2.) V = Valid Sensor Input
Brake
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
1
1
1
0
Outputs
AOUT BOUT COUT Fault
1
-
0
1
-
1
0
1
0
1
-
1
0
-
1
1
0
-
0
1
1
0
-
1
0
-
1
1
-
0
1
1
1
0
-
1
1
-
0
1
Notes
-
1
0
1
0
1
-
1
-
-
-
0
1
-
-
-
0
0
0
0
0
1
0
0
0
0
0
0
0
1
2
0
0
0
0
-
-
-
0
Closed Loop Circuits
Additional amplifiers are used in the OMC506 to provide the necessary control loop compensation for
extended bandwidth. By extending the bandwidth of the direct duty cycle control system, torque
perturbations can be accounted for while regulating the speed of the motor. This allows the module to be
used in relatively dynamic systems as well as constant torque applications. Internally, the compensation
circuitry used for control loop shaping can be tuned to optimize the OMC506 for various applications.
The OMC506 provides directional, braking, and enable interfaces from the controller I.C. (pins 32, 24,
and 25, respectively). The module also allows the user to externally set the pulse width modulation
(PWM) frequency (pin 21) as well as the pulse width from the Closed Loop Brushless Motor Adapter (pin
34). This allows a common module to be used in many applications.
Motor commutation and speed control are derived from the Hall effect sensor signals provided from the
motor. The signals are provided as inputs to the OMC506 (pins 29, 30 and 31). The amplitude of the
sensor signals must be limited, by the user, to + 6.2V to insure proper operation of the module.
Finally, the output from the Closed Loop Brushless Motor Adapter is also provided as an output of the
OMC506. This signal has a fixed amplitude and pre-set pulse width. The frequency is six times that of
the motor. This signal is integrated to produce a voltage proportional to motor speed.
2.1 - 8
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