Medium Voltage Slip Ring Induction Motor

Medium Voltage Slip ring Induction motor adapted to high-voltage power supply and equipped with a slip ring structure on the rotor, high torque output and smooth speed regulation,Suitable for heavy industrial loads.

into fine powder that meets production requirements, directly determining the subsequent production efficiency and product quality.
The reason why grinding mills must use Medium Voltage Slip ring Induction motor s lies in their operational challenges: Firstly, the starting load is high. When the mill is stationary, the internal steel balls and materials form a rigid pile. The starting torque of ordinary motors is insufficient to overcome the initial resistance, easily leading to start-up failure or grid impact. Secondly, there is a clear need for speed regulation. A high speed is required in the coarse grinding stage to improve efficiency, while a low speed is needed in the fine grinding stage to ensure precision. Fixed-speed motors cannot meet both requirements. Thirdly, reliability is strictly demanded. The continuous operation of the production line depends on the stability of the motor. Frequent failures will cause huge economic losses. The structure and performance of slip ring motors precisely address these issues.
Applying the slip ring motors to grinding mills offers significant and practical advantages: Firstly, excellent starting performance.

The selection of Medium Voltage Slip ring Induction motor s is complex.

We once received an inquiry from a customer from Russia.

The specific parameters are as follows: 1400KW, 5500V, 742RPM, IP55W, base-mounted installation.

This motor drives a mill. The difficulty in selecting this motor lies in the starting torque.

Since the mill requires a large starting torque when it is stationary and needs a smooth start,

this poses high requirements for the motor.

Since the customer does not wish to replace the original inverter, we need to ensure that the current and voltage values of the motor's wound rotor are as close as possible to the original parameters. This will enable a perfect compatibility with the original power grid system, allowing the customer to start using it upon receipt and installation.

In response to this situation, our engineers solved the problem perfectly through variable frequency starting.

The advantage of this method is that by adjusting the frequency, the motor can start with a smoother increase in speed.

After the customer received the motor and conducted tests, they stated that the operation was very stable.

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