The medium voltage is between "low voltage" and "high voltage", with a voltage of 6kV/10kV. Medium voltage three phase asynchronous motor is an experiment based on the principle of electromagnetic induction, which converts electrical energy into mechanical energy.
1.Divided by rotor structure:
Squirrel cage rotor motor: The rotor winding is a copper bar cage structure, which has no simple structure and no complex moving parts. It has fewer vulnerable parts and can withstand vibration, dust and other working conditions. This reduces maintenance costs and improves equipment utilization, and can be inspected daily without professional personnel.
Wound rotor motor: The rotor winding of Medium voltage three phase asynchronous motor is an independent three-phase coil
The carbon brush is connected to the external resistance cabinet, which can adjust the starting and running process of the motor in stages or smoothly. This operation will result in a low starting current, controlled at 1.5-2.5 times the rated current, and a large starting torque, 1.8-2.5 times the rated torque. It can also be adjusted with a small amount of speed, achieving a speed regulation of 5% -15%. This series of operations not only protects the power grid but also reduces starting faults
Classification by cooling method:
|
Cooling method |
Cooling Code |
Advantages |
|
Air - Air Cooling |
IC611/IC616/IC666 |
1. Simple structure, no water pipes, and easy maintenance 2. No risk of water leakage, high equipment safety 3. Low initial investment cost |
|
Air-water cooling |
IC81W |
1. High heat dissipation efficiency, 30%-50% higher than the IC611 2. Adaptable to high-temperature environments (stable operation at ambient temperatures ≤ 40°C) 3. Compact heat dissipation components save installation space |
|
Duct ventilation cooling |
IC411 |
1. Isolates the motor from harsh external air, ensuring it always has clean air inside. 2. Prevents corrosive gases and high-concentration dust from entering the motor, extending insulation life. 3. The cooling air source is controllable, adapting to extreme environments. |
2.Core technical parameters (key to selection)
|
Parameter Category |
Key Metrics |
illustrate |
|
Electrical parameters |
Rated voltage |
Common 6kV and 10kV, which must be consistent with the voltage of the on-site power supply system |
|
Rated power |
Covering 200kW-10MW, select according to the power required by the load |
|
|
Rated Current |
The higher the voltage, the greater the power, and the greater the current |
|
|
Power Factor |
Typically 0.85-0.92 |
|
|
Efficiency |
94%-97% |
|
|
Mechanical parameters |
Rated speed |
Determined by the number of poles |
|
Rated torque |
Determines the motor's ability to drive the load, which must be greater than the rated torque of the load |
|
|
Protection level |
IP55 |
3.Advantages
. Medium voltage three phase asynchronous motor is more compact structure, more flexible installation, suitable for high-power requirements
.Reduce wire loss, iron loss and stray loss, and reduce supporting equipment loss
. Strong reliability: able to withstand harsh working conditions, with MTBF exceeding 10000 hours
4.Below is the medium voltage three-phase asynchronous motor that Milestone Motor just exported.
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