Know the characteristics and differences of five types of motors
What are the differences between stepper motors, gearbox stepper motors, servo motors, screw motors, and brake motors?
An electric motor, also known as a "motor", is an electromagnetic device that converts or transmits electromagnetic energy according to the law of electromagnetic induction. The motor is represented by the letter "M" (the old standard uses "D") in the circuit, and its main function is to generate driving torque as a power source for electrical appliances or various machines. The generator is represented by the letter "G" in the circuit.
Our company has a variety of motors, including stepper motors, gearbox stepper motors, servo motors, screw motors and brake motors.
What is the difference between these types?
Stepper motor
A stepper motor is an open-loop control element that can convert an electrical pulse signal into an angular displacement or a linear displacement.
Under non-overload conditions, the motor's speed and stop position depend only 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. This angle is called the "step angle". The rotation of the stepper motor is performed step by step at a fixed angle.
By controlling the number of pulses, the angular displacement can be controlled to achieve accurate positioning; at the same time, by controlling the pulse frequency, the speed and acceleration of the motor can be adjusted to achieve the purpose of speed regulation.
Servo motor
Servo motors, also known as actuator motors, act as actuators in automatic control systems and can convert received electrical signals into angular displacement or angular velocity on the motor shaft for output. It is divided into two categories: DC and AC servo motors. Its main feature is that there is no self-rotation when the signal voltage is zero, and the speed will decrease at a uniform rate as the torque increases.
Servo motors mainly rely on pulses to achieve positioning. It can be roughly understood as follows: for every pulse received by the servo motor, it will rotate the angle corresponding to the pulse to achieve displacement. Since the servo motor itself has the function of emitting pulses, it will emit a corresponding number of pulses for every angle it rotates. In this way, it forms an echo with the pulses received by the servo motor, or a closed loop. In this way, the system can clearly know how many pulses are sent to the servo motor and how many pulses are received back.
In this way, the rotation of the motor can be controlled very accurately, thereby achieving precise positioning, with an accuracy of even 0.001mm.
Gearbox stepper motors
Gearbox stepper motors are usually equipped with a reduction box on the basis of ordinary motors. Through this combination, the speed is effectively reduced and the torque is greatly increased, so that ordinary motors can adapt to more different working requirements and expand their application scenarios and usage space.
Lead screw stepper motor
The similarities between trapezoidal screw and ball screw are that they are products that convert rotational motion into linear motion (or vice versa), and transmit motion and power through the screwing of the nut and the screw. Trapezoidal screw has the characteristics of high transmission efficiency, accurate positioning, and large bearing capacity.
The ball screw manufacturing process and equipment are different from other factories. Our company's advanced transformation technology is combined with the numerical electronic rolling machine imported from Bad Duben, Germany. Our company has strict quality control from the selection of screw raw materials, creative processing, medium-frequency surface heat treatment, and post-processing to meet the best quality of customers' products.
The ball screw with ground-grade nut replaces the transmission mode of traditional Aikem guide screw and trapezoidal guide screw, which can improve the smoothness of operation, reduce friction and axial backlash.
Brake stepper motor
The brake stepper motor is a special stepper motor with a brake device at its tail. When the stepper motor is powered on, the brake device will also be powered on and release the output shaft of the stepper motor, allowing the motor to operate normally. When the power is off, the brake device will brake immediately and hold the motor shaft tightly to achieve the stop or lock function of the motor.
The advantage of the brake stepper motor is its high-precision step control. By inputting a specific pulse signal to the motor, the rotation angle and speed of the motor can be accurately controlled. The brake stepper motor is usually used with a driver, which can provide the corresponding current and pulse signals according to the set step and speed parameters, thereby accurately controlling the movement of the motor.
