Permanent magnet, motor, and generator
A permanent magnet and process technology, applied in the field of electric motors, generators, and permanent magnets, can solve problems such as coercive force drop
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no. 1 approach
[0022] The permanent magnet of this embodiment and an example of its manufacturing method will be described below.
[0023] figure 1 It is a flowchart showing an example of a method of manufacturing a permanent magnet according to this embodiment. Such as figure 1 As shown, the example of the manufacturing method of the permanent magnet of this embodiment includes a compression molded body manufacturing step (S1), a sintering step (S2), a solution heat treatment (S3) step, and an aging treatment step ( S4).
[0024] An example of a permanent magnet that can be produced will be described based on the example of the production method described above. Permanent magnets, for example, have the composition formula: R p Fe q m r Cu t co 100-p-q-r-t (wherein, R is at least one element selected from rare earth elements, M is at least one element selected from Zr, Ti, and Hf, p is a number satisfying 10.5≤p≤12.5 atomic %, and q is a number satisfying 27 ≤q≤40 atomic %, r is a n...
no. 2 approach
[0107] The permanent magnet of the first embodiment can be used for various motors or generators. In addition, it can also be used as a fixed magnet or a variable magnet of a variable magnetic flux motor or a variable magnetic flux generator. By using the permanent magnet of the first embodiment, various motors or generators are configured. In the case where the permanent magnet of the first embodiment is used in a variable magnetic flux motor, for example, Japanese Patent Laid-Open No. 2008-29148 or Japanese Patent Laid-Open No. 2008-43172 can be used in the configuration or drive system of the variable magnetic flux motor. technology disclosed in the bulletin.
[0108] Next, a motor and a generator having the permanent magnets described above will be described with reference to the drawings. Figure 7 It is a figure which shows the permanent magnet motor in this embodiment. Figure 7 In the illustrated permanent magnet motor 21 , a rotor (rotator) 23 is disposed within a ...
Embodiment 1～ Embodiment 4
[0118] The raw materials used in the permanent magnet are weighed and mixed according to a prescribed ratio, and then arc-melted in an Ar gas atmosphere to produce an alloy ingot. The alloy ingot is then roughly pulverized and pulverized by a jet mill to prepare an alloy powder which is a raw material powder of a magnet. The obtained alloy powder was press-formed in a magnetic field to produce a compression-formed body.
[0119] Next, as shown in Table 1, the compression molded body of the alloy powder with a total weight of 200 g was arranged in the mass production sintering furnace chamber, and as a preliminary sintering process, the chamber was set at 9.0×10 -2 In a vacuum state below Pa, the temperature is raised to 1165°C, and the temperature is maintained for 40 minutes. After that, Ar gas is introduced as the main sintering process, the temperature is raised to 1205°C in an Ar atmosphere, and the temperature is maintained for 6 hours to perform sintering.
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Abstract
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