Linear motor is a new type of electric robot driving equipment, which has the advantages of high speed, high efficiency, high precision, good repeatability, etc., and has been widely used. The hydraulic cylinder is a kind of traditional hydraulic system actuator, which has the disadvantages of high power, slow speed and easy leakage of hydraulic oil. This paper will compare and analyze the advantages and disadvantages of linear motor and hydraulic cylinder from various aspects, and then explore whether linear motor can replace hydraulic cylinder to achieve linear motion feasibility.

The hydraulic cylinder generates power through the compression of hydraulic oil to achieve mechanical movement; Linear motors are driven by electromagnetic forces to produce linear motion. As you can see, their mechanical principles are very different. In contrast, linear motors have the characteristics of fast response and high accuracy, while hydraulic cylinders require longer response time and movement time.