The parameters and type selection of linear motor
 
1. Max. voltage - maximum supply voltage or continuous supply peak voltage, mainly related to motor enameled wire, motor insulation material selection and process.
 
2. Peak force - the maximum thrust of the motor, in a short time (a few seconds), depends on the safety limit capacity of the electromagnetic structure of the motor (closely related to the enamelled wire material of the motor); Unit: n.
 
3. Peak current - the maximum working current, corresponding to the maximum thrust, is lower than the demagnetization current of the motor (working for a long time under the peak theoretical current of the motor will cause the motor to heat, which will greatly damage the service life of the motor, and even cause the demagnetization of the magnetic steel inside the motor).
 
4. Peak power - the heat loss of the motor during continuous operation under continuous temperature rise and heat dissipation conditions, reflecting the thermal design level of the motor.
 
5. Max. continuous power loss - determine the upper limit heating loss that the motor can operate continuously under temperature rise and heat dissipation conditions, reflecting the thermal design level of the motor.
 
7. Maximum speed - the maximum operating speed under the determined supply voltage, which depends on the number of back EMF lines of the motor and reflects the results of electromagnetic design of the motor.
 
6. Motor force constant - the thrust current ratio of the motor, in N / A or kn / A, which reflects the result of the electromagnetic design of the motor and the electromagnetic design level in a sense.
 
7. Back EMF - back EMF (coefficient) of motor, unit: vs / m, which reflects the results of electromagnetic design of motor and affects the maximum operating speed of motor under determined supply voltage (reflecting the design parameters of motor).
 
8. Motor constant - the ratio of motor thrust to square root of power consumption, unit n / √ W, which is a comprehensive embodiment of motor electromagnetic design and thermal design level.
 
9. Magnetic pitch NN (magnet pitch) - the magnetic pole spacing distance of the secondary permanent magnet of the motor, which basically does not reflect the design level of the motor. Based on this, the driver needs to solve the motor electrical angle required for vector control by the resolution of the feedback system.