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Navigation: Toolboxes > Mechatronics Toolbox > Servo Motor Editor > Servo Motor Editor > How to use the Parameters |
  
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When you enter a new motor, not all parameters have to be filled in. In this section the critical and non critical parameters are listed.
Only a few parameters are critical. I.e. they are necessary to generate a 20-sim dynamic model.
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Keyname |
A unique name to identify the motor. |
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Type |
The motor type. |
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Maximum Torque or Force |
The maximum short-time or torque or force. |
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Maximum Current |
The maximum short-time current. |
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R |
The resistance at 25° C. |
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L |
The terminal inductance. |
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J_rotor or m_motor |
The rotor inertia or the the moving mass of the motor. |
Some parameters are desired. I.e. they add more detail to the model:
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Nominal Torque or Force |
Torque or force at nominal operation. |
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Nominal Current |
Current at nominal operation. |
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Nominal Speed |
Speed at nominal operation. |
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alpha_c |
The temperature dependency of the coil resistance. |
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ktc |
The temperature dependency of the magnets. |
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poles or pitch |
The number of poles (always an even number) or pole pitch (distance N-N poles). |
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d |
Mechanical damping and eddy current losses. |
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T_fric |
Mechanical friction and hysteresis losses. |
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T_cog |
The amplitude of the cogging torque. |
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Temp_amb |
The ambient temperature. |
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Temp_initial |
The initial temperature of the coils and housing. |
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Temp_max |
The maximum coil temperature. |
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RT1 |
The thermal resistance between rotor and stator. |
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RT2 |
The thermal resistance between stator and environment. |
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CT1 |
Thermal capacity of the rotor. |
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CT2 |
Thermal capacity of the stator. |
If you do not know the values of these parameters, fill in zero. 20-sim will automatically change some into small numbers to prevent division by zero. Because the nominal torque and current are used to derive the torque constant at nominal operation, they will be replaced by the maximum current and torque if you fill in a zero value.
Some parameters will add more detail to the torque speed plot:
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Speed |
The maximum speed. |
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Voltage |
Maximum short-time voltage. |
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Power |
The maximum short time power. |
The remaining parameters are not used in the torque speed plot or the 20-sim model. They are useful for selection criteria when searching motors. If you do not know the values of these parameters, fill in zero.