| 摘要 |
PROBLEM TO BE SOLVED: To provide a pump including an electric motor that improves motor efficiency at a time of a light load without reducing motor efficiency at a time of a high load.SOLUTION: A pump 1 includes a pump rotor 13 mounted to two main shafts 15A, 15B. An electric motor 31A for a high load is mounted to one end of the first main shaft 15A. An electric motor 31B for a light load is mounted to the other end part of the first main shaft 15A or the other end part of the second main shaft 15B. |
