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5.6.3 Custom Motor Data Entry
Motor Parameters dialog has three sections (frames) dividing motor parameters on
groups: Electrical constants, Mechanical constants, and Feedback. When creating a
custom motor you must supply all parameters listed in these sections. All entries are
mandatory except inertia (Jm) parameter. You may enter 0 if you are not sure of a
value.
5.6.3.1 Electrical constants
Motor Torque Constant (Kt).
Enter the value and select proper units from the drop-down list.
Note
Round the calculated result to 3 significant places.
Motor Voltage Constant (Ke).
The program expects the Ke voltage constant to be entered as a Phase-Phase RMS
voltage. If you have Ke for peak sine wave then multiply by 0.707 to get correct Ke
RMS value.
Phase to phase winding Resistance (R) in Ohms ( W).
This is also listed as the terminal resistance (Rt). The phase-to-phase winding
Resistance will typically be between R = 0.5 Ohms and R = 200 Ohms.
Phase to phase winding Inductance (L).
This must be set in millihenries (mH). The phase-to-phase winding Inductance will
typically be between L = 0.5 mH and L = 200.0 mH.
Note
If the units for the phase-to-phase winding Inductance (L) are given in
micro-henries (mH), then divide by 1000 to get mH.
Nominal phase current (RMS Amps)
Maximum continuous phase current rating (Imax) in Amps RMS. Do not use the peak
current rating.
Note
Sometimes the phase current rating will not be given. The equation
below may be used to obtain the maximum continuous phase-to-phase
winding current from other variables.
Imax= Continuous Stall Torque / Motor Torque Constant (Kt)
The same force x distance units must be used in the numerator and denominator in
the equation above. If T (torque) is expressed in units of pound-inches (lb-in) then, Kt
must be expressed in pound-inches per Amp (lb-in/A). Likewise, if T is expressed in
units of Newton-meters (N-m), then units for Kt must be expressed in Newton-meters
per Amp (N-m/A).
Содержание SimpleServo 94
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