How to classify servo motors? ? Urgent..

This is more complicated. The encyclopedia is divided like this:

1 According to the type of working power supply: it can be divided into DC motor and AC motor.

DC motors can be divided into brushless DC motors and brushed DC motors according to their structure and working principle.

Brushed DC motors can be divided into: permanent magnet DC motors and electromagnetic DC motors.

Electromagnetic DC motors are divided into: series excited DC motors, parallel excited DC motors, separately excited DC motors and compound excited DC motors.

Permanent magnet DC motors are divided into: rare earth permanent magnet DC motors, ferrite permanent magnet DC motors and alnico permanent magnet DC motors.

Among them, AC motors can also be divided into: single-phase motors and three-phase motors.

2 According to the structure and working principle: it can be divided into DC motors, asynchronous motors, and synchronous motors.

Synchronous motors can be divided into: permanent magnet synchronous motors, reluctance synchronous motors and hysteresis synchronous motors.

Asynchronous motors can be divided into: induction motors and AC commutator motors.

Induction motors can be divided into: three-phase asynchronous motors, single-phase asynchronous motors and shaded pole asynchronous motors.

AC commutator motors can be divided into: single-phase series motor, AC and DC dual-motor and push-out motor.

3. According to the starting and operation mode: capacitor starting single-phase asynchronous motor, capacitor running single-phase asynchronous motor, capacitor starting single-phase asynchronous motor and split-phase single-phase asynchronous motor.

4 Divided by use: drive motor and control motor.

Motorization for drive: electric motors for electric tools (including drilling, polishing, grinding, slotting, cutting, reaming and other tools), motors for home appliances (including washing machines, electric fans, refrigerators, air conditioners, tape recorders, video recorders, DVD players, vacuum cleaners, cameras, hair dryers, electric shavers, etc.) and other general small mechanical equipment (including various small machine tools, small machinery, medical equipment, electronic instruments, etc.) electric motors.

The control motor is divided into: stepper motor and servo motor.

5. According to the structure of the rotor: cage induction motor (the old standard is called squirrel cage asynchronous motor) and wound rotor induction motor (the old standard is called wound asynchronous motor).

6. According to the running speed: high-speed motor, low-speed motor, constant-speed motor, and speed-regulating motor. Low-speed motors are further divided into gear reducer motors, electromagnetic reducer motors, torque motors and claw pole synchronous motors.

In addition to being divided into graded constant-speed motors, stepless constant-speed motors, stepless constant-speed motors and stepless variable speed motors, speed-regulating motors can also be divided into electromagnetic speed-regulating motors, DC speed-regulating motors, PWM frequency-conversion speed-regulating motors and switched reluctance speed-regulating motors.

The rotor speed of an asynchronous motor is always slightly lower than the synchronous speed of the rotating magnetic field.

The rotor speed of the synchronous motor is always synchronous regardless of the load size.

1.According to the type of working power supply: it can be divided into DC motor and AC motor.

1) DC Motor:

According to the structure and working principle, it can be divided into: brushless DC motor and brushed DC motor.

It can be divided into permanent magnet DC motor and electromagnetic DC motor.

Permanent magnet DC motors are further divided into rare earth, ferrite, and alnico permanent magnet DC motors according to materials.

According to the excitation mode, electromagnetic DC motors are divided into series excitation, parallel excitation, separate excitation and compound excitation DC motors.

2) AC motors can be divided into: single-phase motors and three-phase motors.

It can be divided into AC servo and DC servo.

1. The ordinary motor is an electromagnetic device that realizes the conversion or transmission of electrical energy according to the law of electromagnetic induction, and the servo motor is an engine that controls the operation of mechanical components in the servo system.

2. Special equipment is required for servo motor maintenance and test machine, while ordinary motor does not need special equipment.

3. There are far more types of fault types of servo motors than ordinary motors.

1. Different control methods.

The speed control is analog control, and the position control is pulse control.

2. The adjustment speed is different.

In the speed control mode, the voltage from 0 to 10 is used to adjust the speed, which is an analog control mode.

3. The technology used is different.

These two control modes are implemented using two different control technologies.

This is not the same as open-loop and closed-loop systems for electromechanical systems.

Servo drives, also known as "servo sock slag controller" and "servo amplifier", are a kind of controller used to control servo motors, which is similar to the role of a key fission inverter acting on an ordinary AC motor, which is a part of the servo system and is mainly used in high-precision positioning systems.

Generally, the servo motor is controlled by position, speed and torque to achieve high-precision transmission system positioning, which is currently a high-end product of transmission technology.

First of all, the servo motor adopts a closed-loop control system, which can monitor the position, speed and torque of the motor in real time through feedback signals, and compare and adjust with the control signals to achieve accurate position, speed or torque control.

Ordinary motors usually use an open-loop control system, and the input voltage or current signal directly drives the motor to run, but the position, speed and torque information of the motor cannot be obtained when it cannot be quietly hidden.

Secondly, the control accuracy of the servo motor is high, because it can accurately meet the requirements of the predetermined position, speed and torque through the real-time adjustment of the feedback system.

The control accuracy of ordinary motors is relatively low, limited by the quality of the input signal and the dynamic characteristics of the system, and is usually used in some applications that do not require high-precision control.

In addition, the servo motor has a fast dynamic response capability and can quickly adjust the output to meet the control requirements.

With closed-loop control and high-performance drives, servo motors can achieve high speed, high acceleration and fast response.

The dynamic response of ordinary motors is slower and is affected by the motor's own inertia and mechanical transmission system, and is usually suitable for applications with low speed requirements or low requirements for dynamic performance.

Finally, servo motors are widely used in fields that require high precision and high dynamic performance, such as industrial automation, robots, CNC machine tools, printing equipment, etc.

Ordinary motors are suitable for general mechanical transmission and drive needs, such as home appliances, fans, pumps, conveyor belts, etc.

1. The servo motor is different: the low inertia servo motor is relatively flat and long, the spindle inertia is small, and when the motor does high frequency repeated movement, the inertia is small and the heating is small. The servo motor with high inertia is relatively coarse and has a large torque, which is suitable for occasions with high torque but not fast reciprocating motion.

2. The scope of application is different: generally speaking, the motor with small inertia has good braking performance, fast response to start and accelerate stop, good high-speed reciprocation, and is suitable for some occasions with light load and high-speed positioning. Medium and large inertia motors are suitable for occasions with large loads and high stability requirements.

3. The use conditions are different: the response control of the servo motor driver to the servo motor, the optimal value is the ratio of the load inertia to the rotor inertia of the motor is one, and the maximum value shall not exceed five times. Through the design of the mechanical transmission device, the ratio of load inertia to the rotor inertia of the motor can be close to one or smaller.

When the load inertia is really large, and it is impossible for the mechanical design to make the ratio of the load inertia to the rotor inertia of the motor less than five times, the motor with a large rotor starvation inertia can be used. With a motor with a large inertia, the capacity of the drive should be larger to achieve a certain response.

Servo motor is a kind of auxiliary motor indirect speed change device, also known as servo motor, synchronous motor; And the general motor usually refers to the asynchronous motor. So what is the difference between a general motor and a servo motor? The following will be explained by the technical staff of Zhifu Technology for you:

1. The difference between dedicated and general.

Due to the constraints of the encoder type and manufacturer, the general supporting drive is not only distinguished by inertia, large, medium and small, and power, but also by the communication protocol, that is, a servo motor can only correspond to one driver, and different series of power are correspondingly connected; The general motor can be equipped with slip and detachable dates on the inverter of different powers, as long as it does not exceed the maximum speed current. Therefore, the servo has also brought a challenge to the repair industry, the general motor repair technology content is high, the repair cost is large, not only the need to establish a number of different varieties and power of the servo test platform, but also a lot of experience.

2. The difference between the principle of closed-loop reaction and open-loop condition working.

This is also the biggest difference between servo motor and general motor, servo motor needs to be through the sensor and encoder at the rear end of the motor response speed, azimuth or torque reference value to the supporting driver, and then the driver real-time adjustment of the driving current according to the user-specified value to control the motor rotation, while the general motor is directly driven by the inverter or voltage regulator and other equipment to rotate, and will not be dynamically adjusted to external interference elements such as excessive torque and excessive load, so the former is more efficient, high-grade, energy-saving and accurate than the latter.

3. Differences between synchronous and asynchronous structures.

The servo motor structure is a stator coil + magnetic rotor, which needs to know the magnetic field of the rotor change through the synchronous signal of the reaction encoder to reach the intention of precise control, while the general motor structure is a stator three-phase coil star or triangle structure + rotor core, and the set frequency value is controlled by the driving voltage alone to reach the rotation intention. Therefore, the former is more messy than the latter, and it must not be easily taken apart and adjusted.

Shenzhen Zhifu CNC Technology Co., Ltd. is a Fuji servo motor supplier, which can provide Fuji servo motor, Fuji servo motor consulting, Fuji servo motor letter dismantling selection and various models of inventory in stock. Friends in need, you can dial**:13360525857, or enter**:

Electric cylinders and hydraulic cylinders are common mechanical actuators, their main difference lies in the working principle and the way of use, today Minghui Automation will take you to learn more about the difference between electric cylinders and hydraulic cylinders. The working principle of the electric cylinder: 1

The electric cylinder is driven by a servo motor, and its movement is controlled by a controller. 2.The movement of the electric cylinder is determined by three parameters: position, speed and direction.

3.The movement of the electric cylinder can be precisely adjusted by the controller, which can achieve high-precision positioning and control. The working principle of the hydraulic cylinder:

1.The hydraulic cylinder is driven by a hydraulic pump, and its movement is controlled by a hydraulic valve. 2.

The movement of the hydraulic cylinder is determined by three parameters: position, speed and direction. 3.The movement of the hydraulic cylinder needs to overcome the viscous force and friction of the liquid, so its movement speed is relatively slow.

How to use electric cylinders and hydraulic cylinders: 1Electric cylinders are usually used in applications that require high precision, high speed, and positioning accuracy, such as industrial robots, automated production lines, etc.

2.Hydraulic cylinders are usually used in occasions that require high power and high torque, such as heavy machinery, excavators, etc. 3.

The electric cylinder can be positioned and controlled with high precision through the controller, while the hydraulic cylinder needs to rely on the hydraulic valve to achieve the same function. To sum up, electric cylinders and hydraulic cylinders have their own advantages and disadvantages, and are suitable for different occasions. If high precision, high speed and positioning accuracy are required, the lead electric cylinder should be selected; If you need high power and high torque, you should choose a hydraulic cylinder.

The technical parameters of the servo motor are: 1. Confirmation of speed and encoder resolution. 2. Conversion of load torque on motor shaft and calculation of acceleration and deceleration torque.

3. Calculate the load inertia and the matching of inertia, Yaskawa servo motor as an example, the inertia matching of some products can reach 50 times, but the smaller the actual better, so that the accuracy and response speed are good. Fourth, the calculation and selection of regenerative resistance, for servo, generally more than 2kw, to be configured. Fifth, cable selection, encoder cable twisted pair shielding, for Yaskawa servo and other Japanese products the absolute value of the encoder is 6 cores, incremental is 4 cores.

1. Different definitionsOrdinary motors are our common motors, electric toys, shavers and so on. This kind of motor has the characteristics of too fast speed and too small torque. There are generally only two pins.

When the positive and negative poles of the battery are connected to the two pins, it will rotate, and then the positive and negative poles of the battery will be connected to the two pins in turn, and the motor will also be reversed. Servo positioning mainly relies on pulses. Basically, it can be understood that when a servo motor receives a pulse, it rotates the angle corresponding to the pulse, thereby achieving displacement.

Because the servo motor itself has the function of sending out pulses, the servo motor will emit a corresponding number of pulses every time it rotates at an angle. In this way, it responds to the pulse received by the servo motor, or closed loop. In this way, the system will know how many pulses are sent to the servo Xiaowu motor and how many pulses are received back at the same time.

In this way, the pin Shenfan can control the rotation of the motor very precisely, so as to achieve precise positioning, which can be achieved. Second, the maintenance and debugging of servo motors require special equipment, while ordinary motors do not. Because the structure of the servo motor is closed-loop feedback control, this feedback element is called an encoder, which is used to test the speed, position and torque function of the motor.

But usually the encoder is one-to-one correspondence, that is, different motor series correspond to different drivers, and even the same series of motors with different power correspond to different drivers, which cannot be used interchangeably. Usually, this is especially true of Japanese brands such as Mitsubishi, Yaskawa and Panasonic. When the manufacturer designs for its own interests, the communication agreement is not disclosed, which directly leads to high maintenance and debugging costs, and it is impossible for ordinary industrial maintenance companies to repair ordinary motors.

Ordinary motors only need three-phase voltage regulation and DC voltage regulation, and ordinary inverters are enough to cope with it. 3. There are far more types of faults in servo motors than ordinary motors. Due to the simple structure, ordinary motors are usually machined, machined, welded, and wounded, and the requirements for electronic maintenance are 0; In addition to these, servo motors also need to deal with encoder faults, such as signal attenuation, communication interruption, unstable speed, pulse loss, etc., which are usually related to the electronic components and IC chips on the encoder circuit board, and can only be dealt with with electronic hail loss maintenance skills.