AC motor speed regulation is achieved by changing the electrical parameters such as the power supply frequency, number of pole pairs and slip rate of AC motor.
1. Use the inverter to change the power supply frequency speed regulation, the speed regulation range is large, the stability and smoothness are good, and the mechanical characteristics are hard. That is, with the added rated load, the speed drops less. It belongs to stepless speed regulation. It is suitable for most three-phase squirrel cage asynchronous motors.
2. Changing the magnetic pole logarithmic speed regulation, which belongs to step-by-step speed regulation, has poor smoothness of speed regulation, and is generally used in metal cutting machine tools.
3. Change the slip rate to adjust the speed.
(1) Rotor loop string resistance: used for AC wound asynchronous motor. The speed regulation range is small, the resistance consumes power, and the motor efficiency is low. Generally used for cranes.
(2) Change the power supply voltage speed regulation, the speed regulation range is small, the torque drops greatly with the voltage drop, and the three-phase motor is generally not used. It is used for single-phase motor speed regulation, such as fans.
(3) Cascade speed regulation, the essence is that the rotor introduces additional electromotive force and changes its size to regulate the speed. It is also only used for wound motors, but the efficiency is improved.
(4) Electromagnetic speed regulation. For slip motors only. By changing the current of the excitation coil, the mechanism is simple, but the control power is small. It is not suitable for long-term low-speed operation.
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Buke set off a new frenzy of "M-IoT machine Internet of Things".
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Buke servo motor - what are the basic applications of AC servo motor?
Material metering
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B3: The base has feet. The end cap has no flange. Mounted on foundation members.
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B34: The frame has feet. The end cap has a flange and a screw on the flange.
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Buke servo motor - servo motor maintenance needs to pay attention to
1. Check the servo motor to ensure that there is no fatal damage outside;
2. Check the fixed parts of the servo motor to ensure that the connection is strong;
3. Check the output shaft of the servo motor to ensure the rotation and circulation;
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Buke servo motor - fault and treatment of phase asynchronous motor(6-11)
6. When the motor is unloaded and overloaded, the ammeter pointer is unstable and swings
1. Cause of failure
(1) The cage rotor guide bar is welded or broken;
(2) Winding rotor fault (one-phase break) or poor contact of brushes and collector ring short-circuit devices.
2. Troubleshooting
...
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Hmi:
Human-machine interface refers to the field in which man and machine contact or interact with each other in information exchange and function, or the human-machine interface mentioned in the interface.
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1. Cause of failure
(1) The power supply is not connected (at least two phases are not connected);
(2) Fuse blowing (at least two-phase blowing);
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Buke servo motor - AC servo motor vibration fault analysis
Mechanical
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1. Remove the damaged encoder
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As mentioned above ...
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