What are the differences between electromagnets and motors?

Part 1 : Electromagnet/solenoid is the brother of the motor

Motor is a general term for special devices with power, and include various types of power other than electromagnetic force, such as steam engines, internal combustion engines, hydraulic power, and bioenergy. The motor scope is so wide that it cannot be simply summarized. Therefore, it generally refers to a device that converts electrical energy into mechanical energy.        Among them, devices that use electromagnetic energy are the most common meaning of motors, and most of the motors, we talk about refer to devices that use electromagnetic energy. However, devices that use other than electromagnetic energy, such as ultrasonic motors and electrostatic motors, have also begun to be widely used in various industries.

Part 2:  Electromagnets are devices that convert electromagnetic energy into mechanical motion, so they are classified as a type of motor.

2.1 : Electromagnets are easier to drive

Although there are various types of motors, in order to rotate continuously, some device must be designed to drive them. For example, a DC motor uses mechanical means to energize the coil to convert kinetic energy, or uses a semiconductor switch in the control device to switch kinetic energy. As long as the coil is energized, the electromagnet can move, and there is no need for a coil current conversion mechanism. Special control devices such as dedicated drivers like motors are not required.

2.2:  The motor's rotational motion is endless and continuous rotation, while the electromagnet's rotation is within a limited range.

2.3 : Most general electromagnetic motors have a rotational motion device.

2.4: A motor with a linear motion device is called a linear motor, which is a special state.

2.5:  Electromagnet/Solenoid are available in rotational and direct motion types, but many are direct motion types, which continuously reciprocate in a straight line.