Main parameters and selection of linear motors
Introduce linear motor parameters and selection (Cole linear motors are mainly used on high-precision or high-acceleration equipment)
1. Maximum voltage (max.voltage)————Maximum supply voltage or continuous supply peak voltage, mainly related to motor enameled wire, motor insulation material selection and process;
2. PeakForce—The maximum thrust of the motor, in a short time (a few seconds), depends on the safety limit capability of the electromagnetic structure of the motor (related to the enamelled wire material of the motor); Unit: N
3. Peak current (PeakCurrent)————Maximum operating current, corresponding to the maximum thrust, lower than the demagnetization current of the motor (long-term operation at the peak theoretical current of the motor will cause the motor to heat up, which will cause great damage to the motor life. More serious will cause the magnetic steel inside the motor to demagnetize.);
4.Peakpower—the heating loss of the continuous operation of the motor under continuous temperature rise conditions and heat dissipation conditions, reflecting the thermal design level of the motor;
5. Maximum continuous power consumption (Max.ContinuousPowerLoss)—determine the upper limit heat loss of the motor that can be continuously operated under temperature rise conditions and heat dissipation conditions, reflecting the thermal design level of the motor;
7. Maximum speed (Maximumspeed) - the maximum operating speed under the determination of the supply voltage, depending on the number of back electromotive lines of the motor, reflecting the results of the electromagnetic design of the motor;
6. Motor Force Constant (MotorForceConstant) - the motor's thrust current ratio, unit N / A or KN / A, reflecting the results of the electromagnetic design of the motor, in a sense can also reflect the level of electromagnetic design;
7. Back Electromotive Force (BackEMF)—The motor back electromotive force (coefficient), in units of Vs/m, reflects the result of the electromagnetic design of the motor, affecting the maximum operating speed of the motor under the determination of the supply voltage; (reflecting the design parameters of the motor)
8. Motor Constant (MotorConstant)—the ratio of the square root of the motor thrust to the power consumption, in units of N/√W, is a comprehensive representation of the electromagnetic design and thermal design level of the motor;
9. Magnetic pole pitch NN (MagnetPitch)————The magnetic pole spacing distance of the secondary permanent magnet of the motor does not reflect the motor design level. The driver needs to calculate the motor electrical angle required by the vector control according to the resolution of the feedback system.
10. Winding resistance / each phase (Resistanceperphase) - the phase resistance of the motor, the line resistance is given below, that is, Ph-Ph, which has a great relationship with the motor heating, which can reflect the electromagnetic design level in the sense;
11. Winding inductance / Inductionperphase - the phase inductance of the motor, the line inductance is often given, that is, Ph-Ph, which is related to the motor back EMF, which can reflect the electromagnetic design level in the sense;
12. Electrical time constant (Electrical time constant) - the ratio of motor inductance to resistance, L / R;
13. Thermal Resistance (Resistance) - related to the heat dissipation capability of the motor, reflecting the thermal design level of the motor;
14. Motor AttractionForce——--plate type linear motor with iron core structure, especially permanent magnet motor, the normal attraction of the secondary pole permanent magnet to the primary core is one order of magnitude higher than the rated thrust of the motor, and it is directly decided to adopt a straight line. Bearing capacity and selection of the support rail of the linear motion axis of the motor.
