What is a closed-loop stepper motor, stepper motor open-loop and closed-loop have why to distinguish
by：Zhenyu
2020-10-20
General component is the control mode of stepper motor open-loop control and closed-loop control two kinds of control mode, the open loop control of step motor is the simplest control method with loop control system, in this kind of control mode, the pulse of the stepper motor control input does not depend on the position of the rotor, it was sent by a fixed pattern of its control pulse, the stepper motor only rely on work in the pulse of this series of established, this way of control due to the uniqueness of the stepper motor is suitable for the control of stepping motor.
so what is the closed loop stepper motor?
the closed-loop control is a basic concept of cybernetics. Referred to as the output of the accused in a certain way to return to the control input, and a control of the input control influences relationship. Step motor closed-loop control is to use position feedback and ( Or) Speed feedback to determine the corresponding to the rotor position of phase transformation, can greatly change progress into the motor performance. In the closed-loop control system of step motor, or can be in with the given precision tracking and feedback, expanding the scope of the work, or can be improved under the given speed tracking and positioning accuracy, or limiting speed can be obtained and extreme precision index.
step motor closed-loop control mode is roughly divided into two kinds:
1, the exciting magnetic flux consistent with the current phase relationship, make its produce will help spur the electromagnetic torque of the load torque, the way to control the motor current and brushless dc motor control the same way, known as the drive way or current closed-loop control method of brushless.
2, maintain motor current, control excitation flux and current phase Angle, known as the power Angle closed-loop control method. Power Angle for the rotor pole and stator excitation phase ( Axis or considered synchronous motor stator rotating magnetic field can also) Attracted to each other as phase Angle. The power Angle smaller when low speed or light load, high speed or high load is bigger.
why? Because when high speed, the influence of coil inductance, prolongs the turn off time that A phase current, B phase current rise time is extended, therefore, produce the Angle of peak torque to accelerate its value along with the faster and bigger.
the working principle of closed-loop stepper motor
this kind of control mode is directly or indirectly detect turn to ( Or load) Position or velocity, and then through the feedback and appropriate processing, automatically gives a stepping motor drive pulse sequence, the drive pulse sequence is according to the load or the rotor position at any time and a lot of this kind of method to realize the control mode change, requiring high precision, combining microstep driving technology and microcomputer control technology, can achieve very high location accuracy.
the advantage of closed loop stepper motor
a, with the increase of output torque, the speed of the two are in the form of nonlinear decline, but the torque-speed characteristic in closed-loop control improved.
b, the closed loop control, the output power/torque curve is improved, the reason is that the closed loop, the planetary gear motor excitation conversion is based on the rotor position information, the current value is determined by the motor load, therefore, even in low speed range, current can also be fully converted to torque.
C, closed loop control, efficiency a torque curve.
d, using closed loop control, higher speed than open loop control can be obtained, more stable, more smooth speed.
e, using closed loop control, step motor can be automatically and effectively acceleration and deceleration.
f, closed loop control is relatively open loop control in the rapidity of quantitative evaluation is improved, with the help of a more step IV in through a path interval time:
g, the application of closed loop drive, efficiency can be increased to 7. Eight times, the output power can be increased to 3. Three times, speed can be increased to 3. 6 times. The performance of the closed-loop stepper motor driven in all aspects are better than the open loop drive stepper motor. Step motor closed-loop drive with open loop stepper motor drive and the advantages of the brushless dc servo planetary gear motor. As a result, the high reliability requirement of position control system, the closed-loop control of stepper motor will be widely used.
what's the difference between the stepper motor open-loop and closed-loop
1, the open-loop control content to the other party to perform. There is no feedback. Closed-loop control need each other to perform and report to you. Want to have feedback.
2, whether the current control work. Open loop control is generally completes control activities in a flash, closed-loop control will continue to a certain amount of time, you can take this judgment.
electric motor suppliers is not something to be ignored or taken for granted. It is there to keep your types of gear reducers comfortable year round. To find a cost effective solution, turn to Hangzhou Xiaoshan Zhenyu Transmission Co., Ltd..
Hangzhou Xiaoshan Zhenyu Transmission Co., Ltd. offers best-in-class products, fast delivery time, and personable, highly competent, and unparalleled services.
As the manufacturing procedure of electric motor suppliers becomes more regulated, the costs to businesses will increase and the workforce will suffer as a result.
Many business owners and professionals use services like Hangzhou Xiaoshan Zhenyu Transmission Co., Ltd. to stay on top of manufacturing industry, monitor products’ quality and keep an eye on competitors.
so what is the closed loop stepper motor?
the closed-loop control is a basic concept of cybernetics. Referred to as the output of the accused in a certain way to return to the control input, and a control of the input control influences relationship. Step motor closed-loop control is to use position feedback and ( Or) Speed feedback to determine the corresponding to the rotor position of phase transformation, can greatly change progress into the motor performance. In the closed-loop control system of step motor, or can be in with the given precision tracking and feedback, expanding the scope of the work, or can be improved under the given speed tracking and positioning accuracy, or limiting speed can be obtained and extreme precision index.
step motor closed-loop control mode is roughly divided into two kinds:
1, the exciting magnetic flux consistent with the current phase relationship, make its produce will help spur the electromagnetic torque of the load torque, the way to control the motor current and brushless dc motor control the same way, known as the drive way or current closed-loop control method of brushless.
2, maintain motor current, control excitation flux and current phase Angle, known as the power Angle closed-loop control method. Power Angle for the rotor pole and stator excitation phase ( Axis or considered synchronous motor stator rotating magnetic field can also) Attracted to each other as phase Angle. The power Angle smaller when low speed or light load, high speed or high load is bigger.
why? Because when high speed, the influence of coil inductance, prolongs the turn off time that A phase current, B phase current rise time is extended, therefore, produce the Angle of peak torque to accelerate its value along with the faster and bigger.
the working principle of closed-loop stepper motor
this kind of control mode is directly or indirectly detect turn to ( Or load) Position or velocity, and then through the feedback and appropriate processing, automatically gives a stepping motor drive pulse sequence, the drive pulse sequence is according to the load or the rotor position at any time and a lot of this kind of method to realize the control mode change, requiring high precision, combining microstep driving technology and microcomputer control technology, can achieve very high location accuracy.
the advantage of closed loop stepper motor
a, with the increase of output torque, the speed of the two are in the form of nonlinear decline, but the torque-speed characteristic in closed-loop control improved.
b, the closed loop control, the output power/torque curve is improved, the reason is that the closed loop, the planetary gear motor excitation conversion is based on the rotor position information, the current value is determined by the motor load, therefore, even in low speed range, current can also be fully converted to torque.
C, closed loop control, efficiency a torque curve.
d, using closed loop control, higher speed than open loop control can be obtained, more stable, more smooth speed.
e, using closed loop control, step motor can be automatically and effectively acceleration and deceleration.
f, closed loop control is relatively open loop control in the rapidity of quantitative evaluation is improved, with the help of a more step IV in through a path interval time:
g, the application of closed loop drive, efficiency can be increased to 7. Eight times, the output power can be increased to 3. Three times, speed can be increased to 3. 6 times. The performance of the closed-loop stepper motor driven in all aspects are better than the open loop drive stepper motor. Step motor closed-loop drive with open loop stepper motor drive and the advantages of the brushless dc servo planetary gear motor. As a result, the high reliability requirement of position control system, the closed-loop control of stepper motor will be widely used.
what's the difference between the stepper motor open-loop and closed-loop
1, the open-loop control content to the other party to perform. There is no feedback. Closed-loop control need each other to perform and report to you. Want to have feedback.
2, whether the current control work. Open loop control is generally completes control activities in a flash, closed-loop control will continue to a certain amount of time, you can take this judgment.
electric motor suppliers is not something to be ignored or taken for granted. It is there to keep your types of gear reducers comfortable year round. To find a cost effective solution, turn to Hangzhou Xiaoshan Zhenyu Transmission Co., Ltd..
Hangzhou Xiaoshan Zhenyu Transmission Co., Ltd. offers best-in-class products, fast delivery time, and personable, highly competent, and unparalleled services.
As the manufacturing procedure of electric motor suppliers becomes more regulated, the costs to businesses will increase and the workforce will suffer as a result.
Many business owners and professionals use services like Hangzhou Xiaoshan Zhenyu Transmission Co., Ltd. to stay on top of manufacturing industry, monitor products’ quality and keep an eye on competitors.
