Motor refers to an electromagnetic device that realizes the conversion or transfer of electrical energy according to the law of electromagnetic induction and is represented by the letter “M” in the circuit (the old standard is “D”). Its main function is to generate driving torque as a power source for electrical appliances or various machinery.
Ordinary DC Motor
Ordinary motors are the motors that we usually use in our daily life, including electric toys, razors, etc. Generally, it has only two pins, and the positive and negative poles of the battery are connected to the two pins, and the two pins will turn up. If the positive and negative poles of the battery are connected to the two pins, the motor will also reverse. This kind of motor rotates too fast and the torque is too small, so it is generally not directly used in smart cars.
A DC motor is a motor that converts DC electrical energy into mechanical energy. It is widely used in electric drag because of its good speed regulation performance. According to the excitation mode, DC motors are divided into three categories: permanent magnet, separately excited and self-excited, among which self-excitation is further divided into three types: shunt excitation, series excitation and compound excitation.
A geared motor is an ordinary motor with a gear box added, which reduces the speed and increases the torque, making the ordinary motor more widely used.
This kind of integrated body is usually also called a gear motor, which is usually integrated and assembled by a professional reducer manufacturer and supplied as a complete set. Geared motors are widely used in the steel industry, machinery industry, etc. The advantage of the geared motor is that it simplifies the design and saves space. After World War II, miniature geared motors, DC geared motors were developed and produced. With the continuous development of the geared motor industry, more and more industries and enterprises have used the geared motor, and a number of enterprises have entered the geared motor industry.
Stepper motor is an open-loop control element stepper motor that converts electrical pulse signals into angular displacement or linear displacement. In the case of non-overload, the speed and stop position of the motor only depend on the frequency and number of pulses of the pulse signal, and are not affected by load changes. When the stepper driver receives a pulse signal, it drives the stepper motor to rotate a fixed angle in the set direction, called “step angle”, and its rotation runs step by step at a fixed angle. The stepper motor can control the angular displacement by controlling the number of pulses, so as to achieve the purpose of accurate positioning, and at the same time, the speed and acceleration of the motor rotation can be controlled by controlling the pulse frequency, so as to achieve the purpose of speed regulation.
Servo motors are also called executive motors. In automatic control systems, it is used as an actuator to convert the received electrical signal into angular displacement or angular velocity output on the motor shaft. It is divided into two categories: DC and AC servo motors. Its main feature is that when the signal voltage is zero, there is no self-rotation phenomenon, and the speed decreases uniformly with the increase of torque.
The servo motor is mainly positioned by pulses. Basically, it can be understood in this way that when the servo motor receives one pulse, it will rotate the angle corresponding to one pulse to realize displacement. Because the servo motor itself has the function of sending pulses, every time the servo motor rotates an angle, it will send out a corresponding number of pulses, which echoes the pulses received by the servo motor or is called a closed-loop. In this way, the system will know how many pulses are sent to the servo motor and how many pulses are received at the same time. In this way, the rotation of the motor can be precisely controlled to achieve precise positioning, which can reach 0.001mm.
The above is the introduction of ordinary motors, stepper motors, geared motors, and servo motors. After reading, everyone has a clearer understanding of these four motors and can choose as needed when purchasing. Gearmotors.org will continue to update relevant product information for you.