Buke servo motor - the difference between various motors

The ordinary motors, stepper motors, servo motors, and servos mentioned here refer to DC micro motors, and most of the DC motors we usually come into contact with. An electric motor, also known as a "motor", refers to an electromagnetic induction device that maintains the transformation or transmission of electromagnetic energy according to the laws of electromagnetic induction. The motor is also known as (alias motor), which is expressed by the English letter "M" (the old specification is "D") in the power supply circuit. Its main function is to generate driving torque, which is used as a power source for electrical appliances or various machines. The generator is denoted by the letter "G" in the circuit.

Ordinary motors

Ordinary motors are the motors we usually see a lot, electric toys, razors, etc., generally DC brushed motors. This kind of motor has the characteristics of too fast speed and too small torque, generally only two pins, with the positive and negative poles of the battery connected to the two pins will rotate, and then the positive and negative poles of the battery are connected to the two pins opposite, and the motor will rotate in the opposite direction.

Geared motors

The geared motor is an ordinary motor with a reducer, which reduces the speed and increases the torque, so that the ordinary motor has a wider use space.

Stepper motors

A stepper motor is an open-loop control element stepper motor device that converts an electrical pulse signal into angular displacement or linear displacement. In the case of non-overload, the speed of the motor, the position of the stop only depends on the frequency of the pulse signal and the number of pulses, and is not affected by the change of load, 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 is to run step by step at a fixed angle. The angular displacement can be controlled by controlling the number of pulses, so as to achieve the purpose of accurate positioning; At the same time, the speed and acceleration of the motor can be controlled by controlling the pulse frequency, so as to achieve the purpose of speed regulation.

Servos

The servo is mainly composed of a housing, a circuit board, a coreless motor, a gear and a position detector. Its working principle is that the receiver sends a signal to the servo, judges the direction of rotation through the IC on the circuit board, and then drives the coreless motor to start rotating, transmits the power to the swing arm through the reduction gear, and sends back the signal by the position detector to determine whether the positioning has been reached. The position detector is actually a variable resistance, and the resistance value will also change when the servo rotates, and the angle of rotation can be known by detecting the resistance value.

The specifications provided by the servo manufacturer usually include basic information such as dimensions (mm), torque (kg/cm), speed (seconds/60°), test voltage (V) and weight (g). The unit of torque is kg/cm, which means that at the length of the swing arm is 1 cm, it can lift an object weighing several kilograms. This is the idea of the boom, so the longer the swing arm, the less torsional force there is. The unit of speed is sec/60°, which means the time it takes for the servo to rotate 60°.

Servo motor

Servo motor, also known as actuator motor, is used as an actuator in an automatic control system 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, and its main feature is that there is no rotation phenomenon when the signal voltage is zero, and the speed decreases uniformly with the increase of torque.

The servo motor mainly relies on the pulse to position, basically it can be understood in this way, the servo motor receives 1 pulse, it will rotate the angle corresponding to 1 pulse, so as to achieve displacement, because, the servo motor itself has the function of sending out pulses, so every time the servo motor rotates an angle, it will send out the corresponding number of pulses, in this way, and the pulse received by the servo motor forms an echo, or called a closed loop, so that the system will know how many pulses are sent to the servo motor, and how many pulses are received back at the same time, in this way, It can control the rotation of the motor very accurately, so as to achieve accurate positioning, which can reach 0.001mm.

Servo motors are divided into two categories: AC servo and DC servo.

AC servo motors are divided into two types: asynchronous AC servo motors and synchronous AC servo motors.

DC servo motors are divided into brushed and brushless motors. The brush motor has low cost, simple structure, large starting torque, wide speed regulation range, easy control, and needs maintenance, but it is inconvenient to maintain (change carbon brushes), which produces electromagnetic interference and has requirements for the environment. Therefore, it can be used in cost-sensitive general industrial and civil applications.

Buke servo motor - the difference between various motors

Buke servo motor - the difference between various motors

Sections viewed

Contact

working hours