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Explanation of Size and
Winding Parameters
- Continuous Torque
- The motor is capable of developing
this torque on a continuous basis with no heat
sinking from the stator mounting mechanics.
The motor will reach 135C at room temperature
(approximately 185 C at 71 C ambient) under
these conditions. In actual applications, there
is large heat sinking available from the stator
mounting allowing higher continuous torque ratings.
This rating is therefore very conservative.
- Peak Torque
- The motors can achieve these
levels for short periods of time. The wire current
handling capability and the magnetic saturation
of the steel has all been considered in this
rating.
- Peak power -
The Peak current squared times the motor resistance
at 20C.
- Km - Motor Constant
- A figure of merit which characterizes
the size of a motor with respect to the amount
of torque vs amount of power available. It is
mathematically the peak torque divided by the
square root of peak power or it is the torque
constant (Kt) divided by the square root of
motor resistance (R).
- Poles - The
number of poles has been chosen with consideration
towards peak torque and angle of regard.
- Inertia -
The moment of inertia about the axis of rotation.
Multiply by
0.00706 to convert to Kgm-m2.
- Weight -
The weight of the combined rotor and stator
without leads.
- Voltage Peak
Torque - The nominal voltage required
to generate the peak torque when the winding
temperature is 20 C. It is nominally Peak current
time R. Since the motor torque is proportional
to current, as the motor heats the resistance
increases causing the current to drop for a
constant voltage source. This should be considered
in designing the drive system.
- Peak current
- The current required to generate
the Peak Torque of the motor. It is peak voltage
divided by motor resistance at 20C.
- Kt - Torque Constant
- The amount of torque developed
for a given
current.
- R - Motor resistance
- The 20C resistance of each phase
of the motor.
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Phone: |
(631) 231-9100 |
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Fax: |
(631) 231-8375 |
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