AC servo motors are generally single-phase asynchronous motors with squirrel cage rotors and cup rotors. Like general motors, AC servo motors consist of a stator and a rotor.
There are two different windings on the stator, namely the excitation winding and the control operation winding, and the two windings are 90° different in spatial data.
The housing that holds and maintains the stator is generally made of hard membrane or stainless steel. The rotor of the cage rotor communication servo motor is the same as that of the general three-phase cage motor.
The cup rotor AC servo motor is composed of three parts: the outer stator, the cup rotor and the inner stator. The outer stator is the same as the cage rotor communication servo motor, and the rotor is made of a hollow cup-shaped non-magnetic conductive material (e.g. copper or aluminum), and the bottom of the hollow cup is fixed to shaft 7. The walls of the hollow cup are very thin (less than 0.5 mm), so the moment of inertia is very small. The inner stator is fixed on the end cap 1 and 8 by a stack of silicon steel sheets, and the inner stator has no windings and is only used for magnetic circuits.
When the motor is operating, the inner and outer stators do not move, as long as the cup-shaped rotor rotates in the air gap between the inner and outer stator. For communication servo motors with small output power, the excitation winding and control winding are generally placed in the slots of the inner and outer cores of the stator.
There is no essential difference between the operating principle of AC servo motor and that of single-phase induction motor. However, the AC servo motor must have a certain function, that is, it can overcome the so-called "rotation" phenomenon of the AC servo motor, that is, when there is no control signal, especially when it is already rolling, it should not roll, and if the control signal disappears, it should stop rolling immediately. However, after the general induction motor rolls, if the control signal disappears, it often continues to roll.
When the motor company is in a static state, such as the control of the winding without control of the output voltage, at this moment as long as the excitation winding is energized, the pulsating magnetic field occurs. It is possible to think of a pulsating magnetic field as two different circular rotating magnetic fields. These two circular rotating magnetic fields rotate in opposite directions with the same size and speed, and the positive and rotary rotating magnetic fields that are established cut through the cage winding (or cup-shaped wall) and induce the electromotive force and current (or eddy current) that are fundamentally the same and opposite in phase, and the torque generated in the interaction process between these current data and their respective magnetic fields is also the same and the direction is reversed, and the component torque is zero, and the rotor of the servo drive motor cannot rotate. Once there is a deviation profile signal in the internal control skill system, the control winding must be able to accept the corresponding control input voltage.
Generally speaking, the magnetic field that occurs inside a motor is an elliptical rotating magnetic field. An elliptical rotating magnetic field can be thought of as consisting of two circular rotating magnetic fields.
The two circular rotating magnetic fields have different amplitudes (the same positive rotating magnetic field turns the same due to the larger rotating magnetic field of the original elliptical and the reverse rotating magnetic field rotates less in the opposite direction to the original rotating magnetic field), but they rotate in opposite directions at the same speed.
They cut the rotor windings to induce electric potential, current and electromagnetic torque in the opposite direction, the large (small) forward, the reverse composition torque is not zero, therefore, the servo motor rotates the direction of the magnetic field, the added signal, the magnetic field is close to the circle, the torque is the increase of the magnetic field and torque, the decrease of the rotary magnetic field and torque, with the increase of the composition torque, if the load torque insists on the same, the speed of the rotor increases. If the phase of the operating voltage is changed, that is, the phase shift is 180O, the direction of the rotating magnetic field is opposite, and the direction of the component torque is opposite, and the servo motor will rotate. If the control signal disappears, as soon as the current enters the excitation winding, the magnetic field generated by the servo motor is a pulsating magnetic field, and the rotor will quickly stop rolling. In order to make the communication servo motor have the function of aborting the rotation immediately when the control signal disappears, the rotor resistance of the communication servo motor is made very large, so that the critical slip Sk is greater than 1. During the operation of the motor, if the control signal drops to "zero", the excitation current still exists, and a pulsating magnetic field occurs in the air gap. This fluctuating magnetic field can be seen as an induction of the forward and reverse rotating magnetic fields.
Torque-velocity characteristic curves 1, 2 and their composite characteristic curve 3 are made, which occur after the rotor conductor is cut by a forward and counter-rotating magnetic field. Assuming that the motor is initially driven by a single rotating magnetic field in the positive direction at point A, the load torque at this moment is. Once the control signal disappears, the air-gap magnetic field is converted into a pulsating magnetic field, which can be regarded as a combination of a forward rotating magnetic field and a reverse rotating magnetic field, and the motor operates according to the combined characteristic curve 3.
|
More on that
|
The type of control of the robot – Yamaha robot
1. The control type of the robot can be divided into open-loop control and closed-loop control according to whether there is a reaction or not, during which open-loop control is generally considered to be more accurate, but the requirements are more chaotic. Generally speaking, if we want to accomplish open-loop accurate manipulation, we need to know the accurate model of the controlled target ...
|
|
The difference between RGV, AGV, and IGV handling robots
With the rise of artificial intelligence, the rapid development of science and technology, more and more handling robots have replaced manual work, in the mobile robot market, in addition to the AGV we are familiar with, there are RGV and IGV also play their own effects in the automated logistics system. So RGV, AGV, IGV ...
|
|
The application field of AGV robots is constantly being explored
In recent years, with industrial automation and intelligent manufacturing becoming the mainstream, the AGV profession has ushered in an important development opportunity. So far, AGV has gradually spread and has been deeply used in many fields such as factory transfer and warehousing logistics. Not only that, but the technology continues to be promoted, and the use of ...
|
|
The difference between perception and cognition of Yamaha robots
With the rapid development of AI skills, the use of robots is becoming more and more extensive. A robot is a mechanical device that can complete a task from the master through computer algorithms or pre-programmed instructions. In different occupations and use cases, the perception and cognitive talents of robots are very important. That...
|
|
Welding Robot Application Environment Requirements – Yamaha
The welding robot is different from the general industrial robot in the particularity of the use environment, and the particularity of the use environment is different from the general general industrial robot.
|
|
Yamaha robot position detection
BLOB lookup can be detected using 2x to 10x faster than marginal lookups.
Ideal for position detection where speed is important.
Only the donut shape was detected
Advantages and disadvantages
Advantage:
...
|
|
Introduction to the Classification of Industrial Robots – Yamaha
Industrial robots are multi-joint manipulators or multi-degree-of-freedom machines and equipment for the industrial category, which can actively perform work and complete various functions by relying on their own power and control capabilities. It can accept human command, or it can operate according to pre-programmed programs, and modern industrial robots can also ...
|
|
Performance evaluation index of industrial robots
The working space refers to the set of directions that a specific part of the robot arm can reach under certain conditions. The nature and size of the workspace reflect the size of the robot's working capacity. When understanding the robot's working space, pay attention to the following:
...
|
|
Yamaha Robot Use Cases
Finished product inspection, touch screen evaluator
Functional testing of finished products.
Development of software evaluations.
Button PUSH quality check.
The industry's leading product series with a length of 120mm to 1200mm can support a variety of systems.
Space-saving.
...
|
|
Precautions when palletizing robots are in operation – Yamaha robots
1. When using cranes or forklifts to handle robot palletizers, it is definitely not possible to manually support the robot palletizer control box;
2. Do not lie on the robot palletizer or stand under the lifted robot palletizer during handling;
...
|
|
Precautions for Palletizing Robot Repair – Yamaha
The palletizing robot is a device that actively stacks the bags, cartons or other packaging materials conveyed by the conveyor according to the working method required by the customer's process, and conveys the stacked materials. Palletizing robots have a proper and wide range of applications in the palletizing industry, which greatly saves labor, ...
|
|
Industrial Robot Joint Reducer Role – Yamaha
The role of the key reducer of industrial robots
The operation of industrial robots is mainly controlled by three parts: servo motor, reducer and manipulator, among which the reducer is used to accurately control the movement of the robot joints and transmit greater torque. At present, the common reducer is mainly divided into two ...
|
|
Yamaha Robotics SGF8 all-in-one drive-control module
The SGF8 integrated drive and control module integrates the embedded module of the guide rail, servo motor and drive controller on the basis of the advantages of the embedded module of the guide rail.
Small size, high integration, and simple wiring simplify the customer's electrical design and adapt to the customer's more space needs.
...
|
|
Yamaha teach pendant repair malfunction
YAMAHA Yamaha Teach Pendant Repair Common Faults: Damaged Keys, Power Board Problems, High Voltage Board Problems, LCD Problems, Motherboard Problems, Black Screen, Flower Screen, Blue Screen, White Screen, No Repercussions When Power On, Burning Baoxian When Powered On, Can't Turn On Normally, Can't Enter the System, Contact Problems, Press ...
|
|
Industrial Robot Selection Principles - Yamaha Robots
1 Useful load
The useful load is the maximum load that the robot can carry in its working space, ranging from, for example, 3 kg to 1300 kg.
If you expect the robot to complete the workpiece from one station to another, you need to pay attention to the weight of the workpiece and the machine ...
|
|
Factors Affecting the Performance and Lifespan of Industrial Robots – Yamaha
In recent years, there has been an increasing demand for more industrial robots to be incorporated into production lines across industries, from modern car production to 3C (computer, communication and consumer electronics) product production. Compared with the automation equipment on the traditional production line, the robot operation is flexible and top-notch, so ...
|
|
Steps to disassemble a DC motor – Yamaha
(1) Remove the connecting wires in the motor junction box.
(2) Remove the bolts of the ventilation window on the end cover (rear end cover) of the commutator, open the ventilation window, take out the brush from the brush grip, and remove the connecting wire connected to the brush rod.
(3) Remove the bolts of the end cover of the commutator, the bolts of the bearing cover, and remove the shaft ...
|
|
Application of TOYO module - Yamaha robot
TOYO module is a mechanical structure that can supply linear motion, which can be used horizontally or vertically, and can also be combined into a specific multi-axis combination, that is, it is generally called XY axis, XYZ axis and other multi-axial motion mechanisms in automation occupations.
...
|
|
Yamaha is a robot that aims to race with people
Yamaha's solution will apply what it has learned during the construction of Motobot to improve its various products, including motorcycles, snowmobiles, ATVs, and industrial robots. Yamaha made it clear that "advanced rider safety systems" may be an area where Motobot can help push ...
|
|
Considerations for Industrial Robot Development – Yamaha Robotics
Industrial robots are the products of the organic combination of machinery and computer programs, which can not only save labor, but also have the advantages of sensitivity and precision, fast and efficient, and stable system. There are always some aspects that need to be paid attention to when developing high-performance industrial robots.
|
|
Contact
working hours
