Linear motors
Linear motor converts electrical energy directly into mechanical energy for linear motion, without any intermediate conversion mechanism. It has the advantages of high starting thrust, high transmission stiffness, fast dynamic response, high positioning accuracy and unrestricted stroke length. The linear motor has its unique characteristics, which cannot be replaced by the rotary motor.
Linear motors are different from traditional transmission methods
-High rigidity, no transmission gap and flexibility
-Wide speed regulation range (1um/s-5m/s, screw <1m/s)
-High dynamic performance high acceleration, up to 10g
-Extremely high motion resolution and positioning accuracy
-Infinite travel
-No wear and tear maintenance-free
-Integrated mechanical system designed for easy adjustment
The FV40-20 is a voice coil motor, which is to some extent the same as a linear motor. The difference is that the voice coil motor has only one coil and generally no more than two pairs of poles, and is only required to move within a pair of poles, so there is no need to change phases. When it is necessary to break this travel limit, it is necessary to have more poles and more coils to pick up the force, which is the linear motor. This is why voice coil motors are also called non-commutating linear motors.
-Smaller thrust models with smaller pole pitch design (30mm) to improve current resolution with the same drive, with the negative effect of wider motors
-The effective length of the coil is increased, and the ineffective length of the coil for circulation is reduced, so the thrust per unit weight is increased.
-Adopting coil shaping process, the final coil layout is precise and the control accuracy is high
-Hall sensors are designed to be disassembled and removed for increased maintainability
-High thermal conductivity resin
Linear Motor Parameters
-Polar distance (Electrical Cycle Length)
–The length occupied by a pair of poles, usually the distance of N-N, generally the motor with high thrust, the pole pitch is also large, which is related to the number of turns and length of wire that can be accommodated between a pair of poles
-Thrust constant (Force Constant)
–Each ampere of current can produce the thrust
-Back EMF Constant
–Back EMF voltage per 1 m/s speed
-Motor Constant
–The ratio of the thrust generated by the coil to the power consumed
-Continuous Current
–Continuous current that the coil can withstand to pass continuously without the risk of damage to the coil due to exceeding a certain temperature
-Continuous Force
–Continuous Force –The force generated when the coil is subjected to a continuous current of 100% load factor.
-Peak Current
–The maximum current that can be passed through the coil in a short period of time, generally the peak current through the time of no more than 1 second
-Peak Force
–Thrust generated when the coil passes the peak current
-Maximum Winding Temperature
–The maximum temperature that the coil can withstand
-Motor Resistance (Resistance 25°C, phase to phase)
–Phase to phase resistance of the coil at 25°C
–Motor Inductance (Inductance, phase to phase)
–Phase to phase inductance of the coil.
