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Classification optional servo motor
- Published：Update:2014-04-19 17:04:59
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Perform a motor servo motors known in the automatic control system, as a power transmission element , by a signal provided by the controller into the motor shaft angular displacement or angular velocity of the output command. The servo motor and the rotational position accuracy is very accurate.
In the purchase must be more need to choose adaptation.
Motor Category:
1 brush motor : low cost , simple structure, large starting torque , wide speed range , easy to control , the need to maintain, but easy to maintain ( that is to replace the carbon brushes ) , will produce electromagnetic interference , there are certain requirements for the environment . Therefore it can be used some of the more stringent cost control of the company.
2 brushless motors : a small size, light weight , large output , fast response , high speed , low inertia , smooth rotation , torque characteristics and stable , easy to implement intelligent action, and the motor has a simple maintenance , high efficiency , run advantages of low temperature and long life , widely used in the environment is relatively common and efficient motors.
3 synchronous motors : its power range, can do a lot of power . Large inertia , the maximum rotational speed is low, and with the power increases rapidly decreased. There are two phases in the stator spatial displacement 90 ° electrical angle of the field winding and the control winding WcoWf Wf pick a constant AC voltage , AC voltage or phase -use changes on the Wc applied to achieve the purpose of controlling the motor running . AC servo motor has a stable, controllable, fast response , high sensitivity and mechanical properties and regulation characteristics of nonlinearity index stringent ( requirements were less than 10 % to 15% and less than 15 % to 25% ) and so on. DC servo motor works with the same general DC motor . Motor rotational speed n as n = E/K1j = (Ua-IaRa) / K1j where E is a counter electromotive force of the armature ; K is a constant ; j is the flux per pole ; Ua, Ia is the armature voltage and the armature current ; Ra for the armature resistance . Ua change or change φ, can control the DC servo motor speed , but generally use methods to control the armature voltage . In the permanent magnet DC servo motor, the field winding is replaced by the permanent magnet flux φ constant.
4 synchronous motors : The main operation mode synchronous motor , there are three , namely as generators, motors and compensation machines running . Synchronous motor as a generator to run the main operating mode , as the motor is running is another important way to run synchronous motor. The power factor of the synchronous motor can be adjusted in the case of speed control is not required , the application of a large synchronous motor operating efficiency can be improved . In recent years, small synchronous motor frequency control system began to be more applied . Synchronous motors can also be connected to the grid as a synchronous compensator machine . Then the motor without any mechanical load , by adjusting the rotor excitation current to the grid to issue the necessary emotional or capacitive reactive power , in order to achieve improved power factor , or the purpose of adjusting the grid voltage .
5 Asynchronous motors : In the case without causing misunderstanding or confusion , generally referred to as asynchronous motors induction motors . Ordinary induction motor stator windings AC power grid , rotor windings do not need to connect with other power source. Therefore, it has a simple structure, easy to manufacture, use and maintenance , reliable operation and low mass and low cost advantages. Induction motors have a higher efficiency and better operating characteristics , nearly constant operation from no load to full load within the range of most industrial and agricultural production to meet the requirements of the mechanical transmission .
In the purchase must be more need to choose adaptation.
Motor Category:
1 brush motor : low cost , simple structure, large starting torque , wide speed range , easy to control , the need to maintain, but easy to maintain ( that is to replace the carbon brushes ) , will produce electromagnetic interference , there are certain requirements for the environment . Therefore it can be used some of the more stringent cost control of the company.
2 brushless motors : a small size, light weight , large output , fast response , high speed , low inertia , smooth rotation , torque characteristics and stable , easy to implement intelligent action, and the motor has a simple maintenance , high efficiency , run advantages of low temperature and long life , widely used in the environment is relatively common and efficient motors.
3 synchronous motors : its power range, can do a lot of power . Large inertia , the maximum rotational speed is low, and with the power increases rapidly decreased. There are two phases in the stator spatial displacement 90 ° electrical angle of the field winding and the control winding WcoWf Wf pick a constant AC voltage , AC voltage or phase -use changes on the Wc applied to achieve the purpose of controlling the motor running . AC servo motor has a stable, controllable, fast response , high sensitivity and mechanical properties and regulation characteristics of nonlinearity index stringent ( requirements were less than 10 % to 15% and less than 15 % to 25% ) and so on. DC servo motor works with the same general DC motor . Motor rotational speed n as n = E/K1j = (Ua-IaRa) / K1j where E is a counter electromotive force of the armature ; K is a constant ; j is the flux per pole ; Ua, Ia is the armature voltage and the armature current ; Ra for the armature resistance . Ua change or change φ, can control the DC servo motor speed , but generally use methods to control the armature voltage . In the permanent magnet DC servo motor, the field winding is replaced by the permanent magnet flux φ constant.
4 synchronous motors : The main operation mode synchronous motor , there are three , namely as generators, motors and compensation machines running . Synchronous motor as a generator to run the main operating mode , as the motor is running is another important way to run synchronous motor. The power factor of the synchronous motor can be adjusted in the case of speed control is not required , the application of a large synchronous motor operating efficiency can be improved . In recent years, small synchronous motor frequency control system began to be more applied . Synchronous motors can also be connected to the grid as a synchronous compensator machine . Then the motor without any mechanical load , by adjusting the rotor excitation current to the grid to issue the necessary emotional or capacitive reactive power , in order to achieve improved power factor , or the purpose of adjusting the grid voltage .
5 Asynchronous motors : In the case without causing misunderstanding or confusion , generally referred to as asynchronous motors induction motors . Ordinary induction motor stator windings AC power grid , rotor windings do not need to connect with other power source. Therefore, it has a simple structure, easy to manufacture, use and maintenance , reliable operation and low mass and low cost advantages. Induction motors have a higher efficiency and better operating characteristics , nearly constant operation from no load to full load within the range of most industrial and agricultural production to meet the requirements of the mechanical transmission .
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