Technically, an electric motor (also called an engine) is a machine that converts any type of energy into controlled mechanical energy. There are many kinds of motors based on different energy sourcing and used different purposes in the market.
The one of the most common application is heat engine such as internal combustion engine, which burns fuel (or gas) to generate heat, which is then used to drive something. At the same time, electric motors (AC motors and DC motors) convert electrical energy into mechanical motion, pneumatic motors use compressed air, and spring motors in clockwork toys use elastic energy. Another type of motor is a linear motor, which is a machine that converts energy into linear mechanical energy.
In the machine tool industry, the electrical motor refers to one of the power unit and automation auxiliary components used for axis movement, such as linear motors, brushless motors, etc., used to drive machinery.
In the field of machinery, linear motor is a type of electric motor. Linear motor converts input electric energy into linear motion instead of torsion and rotation. Linear motor is also a type that produces linear motion without a transmission system. The conventional transmission system includes many components, such as rack and pinion, ball screw, screw, cam, etc, for building a rotary motor.
The brushless DC linear motor is composed of a slotted stator with magnetic teeth and a moving actuator. The actuator usually has permanent magnets and coil windings. The motor controller attracts the coil windings in the actuator to guide the activation of the magnetic field, thereby achieving linear motion.
In addition to linear motors, here we will also introduce BLDC motors.
BLDC motors are motors with specific functions and are abbreviations for brushless DC motors. They can be called electronically commutated motors (abbreviated as ECM or EC motors) or synchronous DC motors. The BLDC motor is a synchronous motor driven by direct current through an inverter that sends out alternating current to excite each phase of the motor through a closed-loop controller.
Today, the function of the controller is very important, because many production processes are managed by automated systems, which provide better and better productivity.
In most CNC and automatic machineries, the controller provides current pulses to the motor windings to manage the torque and speed produced by the motor. In general, the structure of a brushless motor system is very similar to a permanent magnet synchronous motor (PMSM for short), and the former can be regarded as a switched reluctance motor or an induction motor, but not a synchronous motor. Therefore, it is necessary to select an appropriate controller and combine the motor control with the automation system to achieve an efficient production process.
Linear motors and BLDC motors are widely used in the field of machine tools, metal processing and automation. Especially in the fields of automation, manufacturers tend to use machining centers with robotic arms to achieve a wider range of applications. The machine is only the most basic structure. It is often the key components of the machines such as the robot arm and automation equipment that determine the product quality and work efficiency.
In the 3C consumable electronics field, because of its high efficiency and long life, it is widely used in continuous operation devices. Such as washing machines, air conditioners and other consumer electronic products, because of their high efficiency help to significantly reduce power consumption, in recent years also used in fans and vacuum cleaner drive.
In response to the needs of smart manufacturing trends, BLDC motor and machine tool technology has developed rapidly. Especially after the machining center and programmed control system (CNC, computer numerical control) were invented, the machining and product standards became more stringent than before. In addition to CNC machining centers, there are CNC turning centers, CNC milling machines, CNC tapping and milling centers, CNC drilling and milling machines, and other custom-made special machines, all of which can integrate an automated system.
Therefore, the new servo motor must be easier to integrate with the automation system and have more versatility in order to be suitable for these efficient and multi-functional machining centers.
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