supply ac brushless servo motor, dc

How does the servo motor work?

Servo motor , also known as the implementation of the motor, is the servo system to control the operation of mechanical components of the engine, is a subsidy motor indirect transmission. It can make the control speed, position accuracy is very accurate, the voltage signal can be converted into torque and speed to drive the control object. The servo motor can be divided into DC servo motor and AC servo motor.
AC servo motor is also composed of stator and rotor. The structure of the stator is basically similar to that of a capacitive phase split single-phase asynchronous motor with two windings of 90 ° different from each other, one for the field winding Rf, which is always connected to the AC voltage Uf; Control winding L, connection control signal voltage Uc. So AC servo motor, also known as two servo motor.  
The rotor inside the servo motor is a permanent magnet, the driver controls the U / V / W three-phase electric field to form an electromagnetic field, the rotor rotates under the action of the magnetic field, and the motor comes with the encoder feedback signal to the Servo driver, it according to the feedback value and the target Value to compare, adjust the rotor rotation angle.
The working principle of the AC servo motor is similar to that of the two-phase asynchronous motor. But because it is in the CNC machine tool as an actuator, the AC signal is converted to the axis of the angular displacement or angular velocity, so the speed of the rotor speed can reflect the control signal phase, no control signal when it does not rotate.  

closed loop stepper motor control system

Some people say that stepper motor system does not need closed-loop, itself is open-loop, but not more than the use of the range can be, and this view I do not agree. I have the following is the point of view:

Closed-loop Stepper system is cheaper than the servo system, in the field of automatic control stepper system used in most of the use,But the possibility of stepping out of the stepping system, and do not know whether it has been out of step and there are step-by-step drive can subdivide and produce micro-step, but the stepper system is mainly to make the current more smooth, Although it can improve the stepping power Machine accuracy, but the micro-step is not reliable.
Because of this, the stepping system is limited to the requirements of high precision and high risk requirements of the machine.With a closed-loop controller, the stepper system accuracy is no worse than the servo, but the speed is not comparable to the servo,If you can use the Linear Scale on the market, the positioning accuracy can exceed the servo motor, because the servo is only semi-closed loop Control, and stepper motor with closed-loop controller and the grating is fully closed-loop control, eliminating the mechanical system error,So the positioning accuracy can be more than the servo system, while the price is only 1 / N servo.

Stepper motor can not guarantee absolute accuracy, but also do not know whether it is accurate, so the workload changes or uncertain working conditions, such as CNC milling machine, engraving and milling machine cutting force changes are uncontrollable, such as In the steel layer of a deep groove milling, to the multi-layer after each cutter, close to the edge of the groove when the cutting force will increase dramatically, in order to cope with this possibility and to ensure accuracy, the only way is to reduce The entire processing speed, in exchange for local safety, and in fact most of the working hours are not in a large resistance state, so a serious reduction in the efficiency of the system.The use of closed-loop controllers can significantly improve the efficiency of the machine in this case, and you do not have to reduce the overall process and speed and efficiency for individual resistance points. The controller will automatically adjust the speed through the resistance point.

Automatically recovers the speed and accelerates the compensation back to the lost pulses, and is instantaneous to complete.If you set the alarm function, can be out of step to a certain situation, the alarm signal to the host computer servo system is the same way.

I have seen a lot of imported mechanical and electrical equipment there are some medical machines, stepper motor behind with an encoder,
To ensure the accuracy and safety of the equipment.

From the above points can be seen stepping motor closed-loop control is the existence of their own rationality and value,Of course, these are only for high demand but not on the servo of the machine, not for low-demand machines.
Its role is to fill the open loop of the stepper motor and high performance servo motor in the middle of the blank,Giving more choice.

AC Servo Motor and Drive – Servo Systems – Fasttobuy

Servo system (AC Servo motor and driver) is used to accurately follow or reproduce a process of feedback control system.Servo systems are an important part of industrial control.


How to control the operation of the machine, those who work professional engineers will know how to operate, for those non-professional people, so, how do we choose the servo motor.


Servo motor has a lot of important parameters, we look through the table to see what important parameters.

servo motor parameter

When we choose the servo, we must first determine the flange,Common flange specifications are: Servo Motor nema24 nema32 nema34 nema52.If you do not need these routine, then you have to customize.As a result, your budget may increase.


Commonly used servo motor power generally have:400w 0.75kw 1kw and 1.5kw

Servo motor power is a variable value, the servo motor low-speed low-power, high-speed high-power.When the speed of the servo motor changes, the rated torque is constant and the rated power increases with speed.


In general, the rated speed of the servo is about 2000 to 3000 rpm,

During the operation of the servo motor, the large current means high torque, the size of the control current, can control the size of the torque.


Finally, you need the main motor voltage is 220V or 380V.


AC Servo motor and driver are widely used in the fields of inkjet printers, lettering machines, pictorial machines, spraying equipment, medical equipment and equipment, computer peripherals and mass storage devices, precision instruments, industrial control systems, office automation, robots and so on. Also in the computer embroidery machine and other textile machinery and equipment has a wide range of applications.


Fasttobuy LTD specializes in industrial automation field. The main products include industrial Servo  and accessories, industrial communication device, industrial network, on-site control, instruments, industrial electronic components, .etc. We mainly distribute and wholesale the servo and stepper and system .Such as leadshine TOAUTO Delta Yaskawa Mitsubishi


Fully automatic weighing Filling Racking Machine

Fully automatic weighing Filling Racking Machine In our daily life, we often go to the supermarket shopping, we may buy some packaged candy, green beans, flour, fruit, and we found this these products have a fixed weight.How is it done? Today I recommend fully automatic weighing filling racking machine to you.

Fully automatic weighing Filling Racking Machine (1)This quantitative filling racking machine product has a high precision weight sensor,and it is mainly used in some solid particles or powder products, such as rice, starch, pharmaceutical particles, etc.such as,We have 1 kg of rice and we need to divide it into 20g 50 parts on average.

Fully automatic weighing Filling Racking Machine (2)

We only need to set the parameters in this product panel control system on it.

Fully Full-aoto weighing filling racking machine Advantages

(1)Automatic powder filling machine, rapid quantitative filling machine.

(2) you can pack particles, the largest particles can use peanuts.

(3) Fast, small error, high performance, can be filled, bags, easy to use.

(4) It can automatically weigh the packaging, suitable for more types of goods

(5) Can be set according to their own needs in the computer board to adjust the weight of packaging items.

(6) With the protection to prevent powder into the motherboard line, the service life is longer.


Technical Support

(1) Products from the factory to provide one year warranty after sales and technical support. and English manual.

(2) Dear friend, when you place an order, please must provide the adapter plug type you need, like US,UK,EU. If you haven’t provide, we will send you according to your country.

In daily life, there are a lot of industrial equipment we may not use, but for individuals or small companies, the use of fully automatic sub-machine, very convenient, and can help you save time and working hours.

Why AC servo motor need a drive

Some time ago, a few students asked me why the AC servo motor needs drive? At that time, I told them at that time.

We know that there are many parameters of the servo motor, such as speed, torque, position and so on.

In order to make it easier to understand, I am here to give an example. AC motor speed is generally 1000 to 3000 r / min, the general power supply is 220V, or 380V, 50Hz, such as Delta AC servo motor, , but sometimes we do not want the motor speed is always the same, so we can change the frequency of the motor to change the way Of the rotational speed. Then we need to be accompanied by such a device to control the motor speed.

AC servo motor and drive kit

Servo motor control is very complex, Such as :Leadshine AC servo motor need to change the frequency, voltage, current, in order to achieve the motor speed, torque, position of the overall control, servo drive is used for this purpose. Servo motor is only responsible for how much you give me the frequency, voltage, I will do the appropriate thing. Frequency, voltage changes, the direction of change, etc. are responsible for changes by the servo controller.

DC brushless servo drive and motor applications

DC brushless servo motor and drive is based on the development and progress of DC brushed servo motor and drive.Brushless DC Motor Kit consists of synchronous motor and drive, is a typical electromechanical integration products.DC brushless servo kit is widely developed, in many areas to help us to work.Now, we talk about DC brushless servo kit applications in different applications.

Brushless DC servo motor and drive kit

Application of DC Brushless Motor in Electric Tools Industry

1.DIY Electric wrench

Brushless DC servo motor drive control + sector some clutch, can be made into an electric wrench; matching rechargeable batteries can be made into a portable electric wrench. Mainly used for the demolition of automobile tires and other fields.


Brushless DC motor for electric grinding machine, you do not need to change brush maintenance work, the speed can also be based on the workpiece grinding speed control, noise than the original brush motor has a greater reduction, and the use of voltage DC, lower voltage, safety greatly improved

3. Vacuum cleaner

Brushless DC motor for vacuum cleaners, electrical parts of the mention greatly reduced high speed, suction, noise, the surrounding electrical interference; if using rechargeable batteries can also be made of portable multi-purpose vacuum cleaner

Application of Brushless DC Motor in Medical Industry.

1 bone saw

Brushless DC motor used for medical instruments made of bone saw surgery, force, cutting speed, low noise, small electromagnetic interference. And can be equipped with rechargeable batteries, making a portable product, easy to use.

2 dental electric mill, electric drill

For dental health of the electric mill, electric drill of the brushless DC motor, small size, fast speed, low noise, low interference, durable and easy to use.

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