Linear actuator motor and DC motor are different in structure, driving principle, application scenario and output power. The linear actuator motor and DC motor should be selected according to the actual demand. The structure, principle and characteristics of these two kinds of motors will be described in detail below.
Linear actuator motor is a kind of transmission device that converts electric energy directly into linear motion mechanical energy without any intermediate mechanism of conversion. It can be thought of as a rotating motor that is split along with the radial direction and spread flat. Linear actuator motor is also called linear motor and push rod motor. Flat-type, U-channel and tubular linear actuator motors are the most common types. The coil typically consists of a three-phase and the brushless phase commutation is achieved by a Hall Sensor.
The linear actuator motor is controlled in the same way as the rotary motor. Just as the brushless rotary motors, the rotor and stator have no mechanical connection (brushless). But unlike the rotary motors, the rotation of the rotor and position of stator remain fixed. The linear actuator motor system can be a magnetic track or a thrust coil (Most positioning system applications are fixed track and thrust coil movement).
For motors moving with thrust coils, the weight and load ratio of the thrust coil is quite small. However, highly flexible cables and their management systems are needed. A motor moving on a magnetic track must bear not only the load but also the quality of the magnetic track, with no need for a cable management system.
Classification of Linear Actuator Motor: Each rotary motor has the corresponding linear actuator motor owing to the corresponding relationship between linear actuator motor and rotary motor mentioned above, but the structure of linear actuator motor is more flexible than that of the rotary motor. In addition, linear actuator motors can be also classified according to the structure and performance besides working principles, owing to some parameters that are closely related to the applications.
A DC motor is a rotary motor that converts DC electrical energy into mechanical energy (a DC motor) or mechanical energy into DC electrical energy (a DC generator). It is a motor that can realize the mutual conversion of direct current and mechanical energy.
When it runs as a motor, it is a DC motor, which converts electric energy into mechanical energy. When it runs as a generator, it is a DC generator, which converts mechanical energy into electrical energy. The structure of DC motor should be composed of stator and rotor. The stationary part of the DC motor is called the stator with the main function of generating a magnetic field, which is composed of the frame, main magnetic pole, commutator pole, end cover, bearing and brush device. The rotating part in the operation called a rotor, whose main role is to generate electromagnetic torque and induced electromotive force, is the hub of energy conversion for DC motor, so it is usually called the armature, composed of shaft, armature core, armature winding, commutator and fan.