Effect of permanent magnet eddy current speed control
Thread Content
Introduction to pumps and fans equipped with permanent magnet eddy current speed controllers: type, speed control range, heating and cooling characteristics, and efficiency.
During operation of a permanent magnet speed regulator, a slip exists between the permanent magnet rotor and the conductor ring, which causes the magnetic flux lines to be cut, generating heat. However, since heat generation was taken into account during the product design, cooling devices are incorporated into the conductor ring to remove the heat generated during operation; as a result, the temperature of the conductor ring and bearings does not exceed 120°C when the equipment is operating normally. The overheating of the equipment is mainly caused by the following reasons: 1. Failed bearings, 2. Overloading of the equipment
The speed control range is limited, the slip is large, resulting in high heat loss and low efficiency.