Who has used a stepper motor closed loop controller

The closed-loop drive system composed of NCS57+57MP80D8E10 is applied in the screw machine, which has the characteristics of high efficiency, no step loss, no vibration, and low heat. The closed-loop drive system is not much different from the AC servo in low- and medium-speed applications, but the cost is much lower.

That kind is called an integrated stepper motor, which is an integrated driver, encoder, etc., which can achieve closed-loop control and prevent loss of step.

I'm using nimotion now, you can find it.

It shouldn't go over the servo. Here's a copy of the information for your reference.

1. Feedback. The fundamental difference between open-loop and closed-loop is whether the current running state signal will be fed back, open-loop has no feedback signal so it is only executed in order, while the closed-loop feedback signal is based on the signal stepper motor driver to take corresponding action measures or signal feedback to the PLC, and the PLC determines the next step of the program processing.

2. Output impact.

Open-loop control system: If there is no feedback loop between the output and input of the system, and the output has no effect on the control of the system, such a system becomes an open-loop control system.

Closed-loop control system: The feedback control system is also called closed-loop control system, and the output has a direct impact on the control effect.

For example, when the ambient temperature is higher than the set temperature, the air conditioning and refrigeration system will automatically turn on and adjust the room temperature to the set value.

Third, the control mode.

Closed-loop control methods are broadly divided into two types:

1. Make the phase relationship between the excitation flux and the current consistent, so that it can generate the electromagnetic torque that can drive the load torque, which is the same way to control the motor current as the brushless DC motor control method, which is called the brushless drive mode or current closed-loop control method.

2. The way in which the motor current is maintained at a certain level and the phase angle of the excitation flux and the current is called the power angle closed-loop control method.

First of all, the closed-loop stepper motor.

It is a stepper motor, and it has all the functional characteristics of a stepper motor. and stepper motors and servo motors.

The biggest difference is that the stepper motor is open-loop control, and the servo motor is closed-loop control. So, when equipping the stepper motor with an encoder.

Broadly speaking, there is no big difference between the two.

However, to distinguish the difference between a closed-loop stepper motor and a servo motor in detail, you need to first understand what is a closed-loop stepper motor and the functions and characteristics of a servo motor.

Closed-loop stepper motors and servo motors mainly have the following differences:

1.The closed-loop stepper motor body is a stepper motor, which is absolutely stationary when stationary. The servo motor can not be absolutely static when stopping, in the case of small load disturbance or good parameter adjustment of the servo motor, the servo motor always fluctuates between plus or minus 1 pulse, and the rigidity of the Zheng ridge motor can be appropriately adjusted to improve its locking torque and performance in actual use.

2.The closed-loop stepper motor combines the characteristics of the stepper motor with the servo control method, so it will not overshoot (because the characteristic of the stepper motor is that it will not overshoot).

When the servo motor is changed from high speed to low speed or stationary, overshoot often occurs. When the controller sends a pulse to the servo motor, the servo motor often takes 3 pulses instead of one pulse, and then rewinds 2 pulses. This is absolutely not allowed for those scenes with strict environmental requirements.

3.The commissioning and use of closed-loop stepper motors is very simple, only the driver needs to be adjusted.

of 3 potentiometers.

It can be used not only by the equipment manufacturer, but also by the equipment user, and the requirements for the user are extremely low. The servo motor has many parameters, and the debugging is more difficult, and it needs to be debugged by experienced engineers.

4.The closed-loop stepper motor adopts a real sine wave, vector and filtering mode to control the current, and the minimum speed can be controlled in the revolution, and the motor runs very smoothly and steadily, which even the servo motor can not do (the general servo motor can theoretically do 1 revolution, the actual application is unable to achieve 1 revolution, roughly above 5rpm).

5.Comparatively speaking, the accuracy of servo motors is higher than that of closed-loop stepper motors.

6.In terms of cost, in order to achieve the same function, the servo motor is larger than the closed-loop stepper motor of the same power, and the stepper motor is advantageous in terms of cost performance.

First of all, you need to know about servo motors and steps

The difference between the incoming motors is different. Return.

These two types of motors are present in principle.

A: There is a big difference, and it is not possible here because of space limitations.

Let's talk about the commonly used features:

1）.Maximum speed: Commonly used servo motor The maximum speed is 3000 to 6000 rpm directly.

The maximum speed of the stepper motor is about 1000 rpm.

2）.Function: The servo motor has position control mode, speed control mode, torque control mode, and the function is stronger than that of the stepper motor.

3）.Servo motors natively integrate encoder feedback, while most stepper motors are encoder-free feedback signals. There are also a small number of manufacturers with stepper motors with integrated encoder feedback signals.

The difference between open-loop and closed-loop.

1）.Open-loop control, it is easier to understand, most manufacturers' stepper motors are open-loop pulse control. The controller sends a pulse to the driver, which controls the current value of the stepper motor.

2).Closed-loop control is divided into two modes: semi-closed-loop and full-closed-loop

The controller (e.g. PLC) sends pulses to the driver, the driver controls the current output of the motor, and the motor encoder signal is fed back to the driver. This mode is a semi-closed-loop control method.

If the encoder signal is fed back to both the driver and the controller, this mode is a fully closed-loop control mode.

Hello closed-loop stepper motor synchronous control method is a high-precision control method, which can realize the precise motion control of the stepper motor, avoid the loss of step of the stepper motor, and improve the motion accuracy and stability of the stepper motor. The specific steps are as follows:1

Choose the right closed-loop controller: The synchronous control of closed-loop stepper motors requires the use of a closed-loop controller, which is usually achieved by choosing a position loop controller or a speed loop controller. 2.

Sensor installation: In order to achieve closed-loop control, a position or speed sensor needs to be installed on the stepper motor in order to monitor the motion status of the stepper motor in real time. 3.

Control algorithm design: According to the needs of the stepper motor and the feedback information of the sensor, the appropriate control algorithm is designed to achieve closed-loop control. 4.

Control parameter debugging: According to the actual application requirements, the control parameters are debugged and the closed-loop control algorithm is optimized to make the movement of the stepper motor more accurate and stable. 5.

Controller interface setting: connect the closed-loop controller with the stepper motor, and set the controller interface to communicate with the control hole control system. 6.

Real-time monitoring of motion control: real-time monitoring of the motion status of the stepper electromill, control and adjustment according to the feedback information of the sensor, and ensure the motion accuracy and stability of the stepper motor. 7.

Feedback adjustment of the control system: According to the actual movement of the stepper motor, the feedback adjustment of the control system is carried out to further improve the accuracy and stability of the control of the synchronous belt vibrillator of the closed-loop stepper motor.

Kiss is glad to answer this question for you. <>

The synchronous control method of closed-loop step-by-step motor refers to the method of precise control of stepper motor through motor drive controller. In this method, the control signal of the motor is adjusted by detecting the position, speed and other parameters of the motor, so as to realize the synchronous movement and precise control of the motor. The following is the general stepper motor closed-loop control method flow:

1.The motor drive controller detects the position and speed of the motor fighting macro. 2.

The controller compares the detected motor parameters with the preset control parameters to determine whether the motor deviates from the expected motion trajectory. 3.If the motor deviates from the expected trajectory, the controller adjusts the control signal of the motor to return it to the expected state of motion.

4.Repeat the above steps to achieve synchronous movement and precise control of the motor. The closed-loop stepper motor synchronous control method has the following advantages:

1.High precision: By detecting the position and speed of the motor, the precise control of the motor movement can be realized, and high control accuracy can be achieved.

2.High reliability: By detecting the movement status of the motor in real time, and finding and correcting the motor movement deviation in time, the qualitative and reliability of the system can be improved.

3.Wide range of application: The synchronous control method of closed-loop stepper motor is suitable for a variety of different occasions, such as automation equipment, robots, electronic equipment, etc.

4.Easy to implement: Modern motor drive controllers already have integrated closed-loop control algorithms, and it is relatively simple and easy to use the closed-loop stepper motor synchronous control method.

To sum up, the closed-loop stepper motor synchronous control method is a motor control method with high precision, high reliability, wide range of application and easy to realize, which has been widely used in various automation equipment and robots.

Stepper motors are generally used in digital control systems.

Stepper motors are mainly used in digital control systems with high precision and reliable operation. Closed-loop control is also possible if position detection and speed feedback are used. Stepper motors have been widely used in digital control systems, such as digital-to-analog conversion, assembly and excavation, CNC machine tools, computer peripherals, automatic recorders, clocks, etc., and are also used in industrial automation production lines, printing equipment, etc.

Stepper Motor Introduction:

1. The stepper motor converts the electrical pulse signal into an angular displacement to control the rotation of the rotor. It is used as an actuator in an automatic control device. Each time a pulse signal is inputted, the stepper motor takes a step forward, so it is also called the pulse electric stool motor.

Stepper motors are mostly used in the peripherals of digital computers, as well as in devices such as printers, plotters, and disks.

2. The driving power supply of the stepper motor is composed of a variable frequency pulse signal source, a pulse distributor and a pulse amplifier, and the driving power supply provides pulse current to the motor winding. The running performance of the stepper motor depends on the good coordination between the motor and the drive power supply.

3. The advantages of stepper motor are that there is no cumulative error, simple structure, easy use and maintenance, low manufacturing cost, and the ability of stepper motor to drive load inertia is large, which is suitable for small and medium-sized machine tools and places with low speed accuracy requirements, and the disadvantage is that the efficiency is low, the heat is large, and sometimes it will "lose step".

Open-loop control is equivalent to sending a regular letter, and the content is just let the other party execute. No feedback.

Closed-loop control is equivalent to sending ** letters, which need to be executed by the other party and reported to you. Have feedback.

The fundamental difference between open-loop and closed-loop is whether the current running state signal will be fed back, open-loop has no feedback signal so it is only executed in order, while the closed-loop feedback signal is based on the signal stepper motor driver to take corresponding action measures or signal feedback to the PLC, and the PLC determines the next step of the program processing.

Open-loop control generally only has a current loop.

control, and the closed-loop control step has current loop control, as well as position loop control, and the introduction of FOC magnetic field vector control technology, greatly reduce the motor heating and improve motor efficiency, such as EZS57+57HS10EN-1000 to form a closed-loop drive system, no zero vibration.

Open-loop control can only control its action and does not give feedback on the results. Closed-loop control can analyze the effect of its action for feedback adjustment.

The control mode of stepper motor is generally divided into:Open-loop control.

withClosed-loop controlTwo control modes, wherein the simplest control mode of open-loop control stepper motor is the ring control system, under such control mode, the input of the control pulse of the stepper motor does not depend on the position of the rotor, but sends out its control pulse according to a fixed law, the stepper motor only relies on this series of established pulses and works, and this control mode is more suitable for controlling the stepper motor because of the uniqueness of the stepper motor.

The integrated closed-loop stepper motor refers to a control relationship in which the output as the controlled output returns to the input end as the control in a certain way, and exerts control influence on the input end. Closed-loop control of stepper motors uses position feedback and/or speed feedback to determine the phase transition appropriate to the rotor position, which can greatly improve the performance of stepper motors.