Frequency conversion transformer
A frequency conversion transformer and stator iron core technology, applied in the field of frequency conversion transformers, can solve the problems of shaft system stability and safe operation of units, high shaft vibration and tile amplitude values, complex system structure, etc., so as to save manufacturing costs and reduce volume. , the effect of improving operational reliability
Inactive Publication Date: 2014-11-19
CHINA UNIV OF MINING & TECH
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Problems solved by technology
Because the system requires a separate drive motor to be coaxially connected with the winding asynchronous motor, the system structure is complex; in addition, the unit has a long shaft system and many bearing seats, so that the shaft vibration and pad amplitude are high, which is harmful to the stability of the shaft system and the stability of the unit. bad for safe operation
Method used
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Embodiment Construction
[0013] An embodiment of the present invention will be further described below in conjunction with accompanying drawing:
[0014] Such as figure 1 , figure 2 and image 3 As shown, the frequency conversion transformer includes a stator, a rotor and a rotating shaft 12. The stator includes a stator core 1, a stator slot 2, a stator three-phase power winding 3 placed on the upper layer of the stator slot 2, and a stator three-phase power winding 3 placed in the above stator slot 2. The lower stator three-phase control winding 4, the stator three-phase power winding 3 is connected to the three-phase grid GRID1, and the stator three-phase control winding 4 is connected to the reversible frequency converter RPC. The rotor includes a rotor iron core 5, a rotor wire slot 6, a permanent magnet slot 7, a rotor three-phase power winding 8 and a permanent magnet 9; a rotor wire slot 6 is dug on the surface of the rotor iron core 5, and a rotor wire slot 6 is drilled on the rotor wire ...
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A frequency conversion transformer comprises a stator, a rotor and a rotating shaft. The stator comprises a stator iron core, a stator wire slot, a stator three-phase power winding placed on the upper layer of the stator wire slot and a stator three-phase control winding placed on the lower layer of the stator wire slot. The rotor comprises a rotor iron core, a rotor wire slot, a permanent magnet slot, a rotor three-phase power winding and a permanent magnet. A group of three-phase sliding rings are fixedly installed on the rotating shaft, a three-phase electric brush is correspondingly installed on the three-phase sliding rings, the stator three-phase power winding is connected with a first three-phase power grid, the rotor three-phase power winding is connected with a second three-phase power grid, and the stator three-phase control winding is connected with a reversible frequency converter. The frequency conversion transformer integrates a frequency conversion transformation motor and a driving motor which share the iron core, greatly simplifies the structure, simultaneously reduces size, saves manufacture cost, facilitates onsite assembly and maintenance and improves operation reliability.
Description
technical field [0001] The invention relates to a frequency conversion transformer, in particular to a frequency conversion transformer suitable for the field of electrotechnical technology. Background technique [0002] Two power grids with different frequencies cannot be directly connected, and frequency and voltage conversion must be performed through frequency conversion transformers, and then grid-connected. In the fields of wind power generation systems and communication systems between power grids, variable frequency transformers have broad application prospects. The current frequency conversion transformer has two forms: power electronic frequency conversion transformer and mechanical frequency conversion transformer. Power electronic variable frequency transformers have the disadvantages of large volume, complex control, and limited capacity. The current mechanical variable frequency transformer consists of a variable frequency and variable voltage motor (ie, a wo...
Claims
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IPC IPC(8): H02K47/20H02J3/34
Inventor 邓先明叶宗彬汪文文谭国俊甄文欢郭其锋郑菲菲王珍珍
Owner CHINA UNIV OF MINING & TECH