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Which rotor structure is better for asynchronous motors
In asynchronous motors, the squirrel cage rotor structure performs better in terms of universality and economy, while the wound rotor structure is suitable for specific scenarios that require higher starting and speed regulation performance. The specific analysis is as follows: 1. The squirrel cage rotor structure is simple in structure, low in cost, reliable in operation, easy to maintain, and has a high power factor; 2、 The wound rotor structure has excellent starting and speed regulation performance, complex structure, high cost, and limited applicable scenarios; Summary: If high requirements are placed on cost, reliability, and versatility, squirrel cage rotors are a better choice; If high starting/speed regulation performance is required, a wound rotor is more suitable.
Which rotor structure is better for asynchronous motors
In asynchronous motors, the squirrel cage rotor structure performs better in terms of universality and economy, while the wound rotor structure is suitable for specific scenarios that require higher starting and speed regulation performance. The specific analysis is as follows:
1、 Rat cage rotor structure
Simple structure and low cost
Composed of copper aluminum conductors and short-circuit rings, no external wiring required, mature manufacturing process, suitable for large and medium-sized motors.
Reliable operation and easy maintenance
Without external wiring, it reduces the number of fault points and does not require frequent maintenance.
High power factor
The small air gap (0.2~2.0mm) avoids the problems of increased excitation current and decreased power factor caused by excessive air gap.
2、 Wound rotor structure
Excellent starting and speed regulation performance
By using external resistors or slip rings for control, soft start, speed regulation, and forward/reverse rotation can be achieved, which is suitable for situations where precise speed control is required.
Complex structure and high cost
Additional slip rings, brushes, and wiring are required, resulting in higher manufacturing and maintenance costs.
Limited applicable scenarios
Mainly used for special applications that require high starting performance and speed regulation accuracy, such as fans, pumps, and other equipment that require frequent start stop.
Summary: If high requirements are placed on cost, reliability, and versatility, squirrel cage rotors are a better choice; If high starting/speed regulation performance is required, a wound rotor is more suitable.
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