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Moog Animatics SmartMotor™ Developer's Guide, Rev. L
Page 538 of 909
MDE
Mode Enhanced (Commutation Mode)
APPLICATION:
Motion control
DESCRIPTION:
Enables enhanced trapezoidal (6-step) mode commutation
using the encoder
EXECUTION:
Immediate; remains in effect until otherwise commanded
CONDITIONAL TO:
Motor rotates past internal index to initialize commutation
angle
LIMITATIONS:
N/A
READ/REPORT:
N/A
WRITE:
Write only
LANGUAGE ACCESS:
N/A
UNITS:
N/A
RANGE OF VALUES:
N/A
TYPICAL VALUES:
N/A
DEFAULT VALUE:
D-style motors default to MDT commutation mode;
M-style motors default to MDC commutation mode
FIRMWARE VERSION:
5.x and later
COMBITRONIC:
MDE:3
where ":3" is the motor address — use the actual address or a
variable
DETAILED DESCRIPTION:
The MDE command enables the motor's enhanced trapezoidal commutation mode using the
encoder. This driving method is the same as basic trapezoidal commutation using Hall
sensors. However, it also uses the internal encoder to add accuracy to the commutation
trigger points. This idealized trapezoidal commutation mode offers the greatest motor torque
and speed, but it can exhibit minor ticking sounds at low rates, which are created as the
current shifts abruptly from one coil to the next.
Because MDE uses the encoder, it requires angle match (the first sighting of the encoder
index) before it will engage.
Use status word 6 to see the active commutation mode.
NOTE:
MDE, MDS and MDC require angle match before they will take effect. This
means the SmartMotor's factory calibration is valid and the index mark of the
internal encoder has been seen after startup. The default commutation mode for
D-style motors is MDT (see MDT on page 546); the default commutation mode for
M-style motors is MDC (see MDC on page 536).
Part 2: Commands: MDE
Содержание SmartMotor
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