Semi-direct drive model
The concept of semi-direct drive came into being when the direct drive and doubly-fed wind turbines were developing towards large-scale development, taking into account the characteristics of both. From the structural point of view, semi-direct drive and double-fed are relatively similar, with the characteristics of various layout forms, but the appearance is similar to that of direct drive. Semi-direct drive and double-fed and direct-drive fans are different. One is that the transmission ratio of the semi-direct-drive gearbox is lower than that of the double-fed model, the other is that the semi-direct-drive generator is with higher speed compared with the direct-drive model. This determines that on the one hand, the semi-direct drive can improve the reliability and service life of the gearbox, and at the same time, compared with the direct drive generator, it can take into account the corresponding generator design and improve the design and manufacturing conditions of the high-power direct drive generator.
Information for an application discussion
Connect product documents to the actual installation position using the information below. This intake guide does not establish that a designation is suitable for the equipment.
- Equipment
- Equipment name, manufacturer, model, purpose, bearing position, full designation and suffixes; mark the bearing position and revision on drawings.
- Operation
- Load directions and available values, speed range, starts and operating cycle, lubrication, temperature records and environment; retain units and measurement conditions.
- Observations
- State whether the request concerns a new selection, maintenance replacement or operating problem; add timing, maintenance history, photographs and inspection records.
