Power device

Abstract

Disclosed is a power device in which miniaturization and reduced manufacturing costs can be achieved and in which design freedom can be increased. In the power device (1), a first rotary machine (11) comprises: a first rotor (14) which has a prescribed plurality of magnetic poles (14a); a stator (13) which generates a rotating magnetic field by generating a prescribed plurality of armature magnetic poles; and a second rotor (15) which has a prescribed plurality of soft magnetic bodies (15a). The ratio of the number of armature magnetic poles, the number of magnetic poles, and the number of soft magnetic bodies is set as 1:m:(1+m) / 2(m no equal to 1.0). One of the two rotors (14, 15) is mechanically linked with the output section (3a) of a heat engine (3), while the other of the two rotors (14, 15) and a rotor (23) of a second rotary machine (21) are each mechanically linked with driven sections (DW, DW). Furthermore, the heat engine (3) is started (steps 2, 4) in a state in which the rotational speed of the output section (3a) is not permitted to increase, if the rotational speed of the output section (3a) is equal to or greater than a first prescribed value (NEST1) when the heat engine (3) is started.

Description

technical field [0001] The present invention relates to a power plant including two or more different power sources such as a heat engine and a rotary machine. Background technique [0002] Conventionally, as such a power plant, for example, a power plant disclosed in Patent Document 1 is known. This power unit drives drive wheels of a vehicle, and includes an internal combustion engine as a power source, a first rotary machine, and a second rotary machine. This second rotary machine is of the usual single rotor type. [0003] In addition, the above-mentioned first rotary machine is a double-rotor type, and has a stator, a first rotor, and a second rotor. The first rotor, the second rotor and the stator are arranged sequentially from the inner side along the radial direction. The first rotor has a first permanent magnet row and a second permanent magnet row extending along the circumferential direction and arranged along the axial direction. In addition, the stator is co...

AI Technical Summary

Problems solved by technology

As a result, it inevitably leads to an increase in size and manufacturing cost of the first rotary machine, which in turn leads to an increase in size and manufacturing cost of the power unit.

In addition, in the first rotary machine based on this structure, only the difference between the rotational speeds of the first and second rotating magnetic fields and the rotational speed of the second rotor and the difference between the rotational speeds of the second rotor and the rotational speed of the first rotor are the same. The speed relationship is established, so the degree of freedom in the design of the first rotary machine is reduced, and the degree of freedom in the design of the power plant is reduced

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