1. Select magnet wires with good corona resistance to meet the requirements of high-frequency pulse resistance and partial discharge of the motor.
Generally, polyesterimide/polyamideimide composite layer enameled wire is used, which is corona resistant and corona resistant magnet wire.
Second, winding, embedded wire construction technology.
The processing technology of frequency conversion motor in winding, embedding, and lashing must be strictly managed, especially in the process of winding and embedding to prevent damage to the wire, and the embedding process should ensure that the groove insulation, phase insulation, and interlayer insulation are placed in place. The phase insulation should be made of materials that are easily soaked by insulating paint, and the end of the coil should be strengthened and fixed to ensure that the end becomes a whole.
Strengthen the insulation at the bottom of the motor groove, between phases, between layers and at the first and last turns of the coil to improve the electrical resistance of the motor.
3. The main insulation shall be insulated without air gap.
The air gap in the insulation structure of the inverter motor is the main factor that causes corona. In order to ensure that there is no air gap in the overall insulation structure of the motor, according to the provisions of the national standard GB/TZ1707-2008 "Specification for Three-phase Asynchronous Insulation for Frequency Conversion Speed Regulation", the impregnating paint for the special three-phase of frequency conversion speed regulation must be no less than Class F solvent-free paint, and the volatile content is less than 10%, and the VPI process is adopted. The process also improves the overall mechanical strength of the insulating structure.
Fourth, do a good job of matching between the cable and the motor, and limit the length of the cable between the motor and the power supply.
Due to the mismatch of the impedance of the power line, as the length of the cable between the inverter and the motor increases, the amplitude of the overvoltage at the motor end increases, which is prone to partial discharge. To this end, the length of the connecting cable should be shortened as much as possible according to the specific characteristics and actual needs of the variable frequency power supply, so as to reduce the overvoltage amplitude and partial discharge at the motor end and prolong the life of the motor.
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Estun Servo Drive - Drive Alarm A25/A26/A27
Alarm code A25/A26/A27 refers to.
Causes:
1. Power line problem;
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3. Mechanical transmission problems.
Solution:
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Eston servo features
Features of Estun servo.
High overload capacity.
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1. Estun servo motor maintenance - overload alarm A04
1. The wiring of the servo motor is wrong or the wiring is leaking
(1) The U, V, and W phase wires of the motor are connected incorrectly
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...
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1. Fault phenomenon:
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2. Causes:
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Phase-controlled ...
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Estun Server Alarm A.01 Parameter Broken
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Estun Servo Motor - Servo Motor Top 10 Failure Analysis
1. Motor encoder alarm
1. The cause of the failure
(1) Wrong wiring;
(2) electromagnetic interference;
(3) Encoder hardware damage caused by mechanical vibration;
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2. Troubleshooting
(1) Check the wiring and troubleshoot the error ...
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