Electric pump unit
OwnerTakatoshi Sakata, Yasuo Asai +2inventors
InventorsTakatoshi Sakata, Yasuo Asai, Yasuhiro Yukitake, Kouji Yoshinami
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Abstract
In an electric pump unit in which a single shaft (main shaft) functions both as a rotation shaft of a pump section and that of a motor section, a rotor of a motor has a structure in which a magnet is embedded in a rotor core (IPM structure). According to the configuration, in the electric pump unit of the invention, it is not required to dispose a protective ring in the periphery of the rotor core. In addition, rotation of the main shaft can be supported by the inner-diameter face of the stator core. Accordingly, the electric pump unit of the invention can be configured as an electric pump unit which is lighter, more compact, and more economical as compared with a conventional product.
Claims5
An electric pump unit in which a pump section for sucking and discharging a fluid is formed on one end side of a rotation shaft disposed through a hole provided in an inner wall for dividing a housing, and a motor section is formed on another end side of said rotation shaft, said motor section comprising:
- a rotor consisting of a rotor core and a permanent magnet which are fixed to an outer circumference of said rotation shaft;
- and a stator consisting of a stator core having a teeth portion, and a coil which are disposed in a periphery of said rotor, wherein
- said permanent magnet constituting said rotor is embedded in said rotor core.
Dependencies are inferred from the claim text.