Combined type motor

Abstract

This invention discloses one compound motor, which comprises shell, top cover and leg motor and permanent motor, wherein, said leg motor rotor and permanent motor rotor center are orderly set along same direction of rotation axis with rotor center on rotation axis; the stator center locates between rotor center and rotor on top cover; stator iron center is relative to rotor iron center is separately set with permanent motor stator and leg motor stator set.

Description

technical field [0001] The invention mainly relates to the field of motors, in particular to a composite motor that can operate as a generator and as a motor. Background technique [0002] In the prior art, motors are classified into electric excitation motors and permanent magnet motors. The former is to generate a magnetic field by passing current through the motor windings. Such a motor not only needs special windings and corresponding devices, but also needs to continuously supply energy to maintain the current flow; the latter generates a magnetic field by permanent magnets without external Energy can establish a magnetic field in its surrounding space, which can simplify the structure of the motor and reduce its volume, and can save energy. With the advent of alnico permanent magnets, ferrite permanent magnets, especially rare earth permanent magnets, the magnetic properties of permanent magnets have been greatly improved, and many electric excitation motors have swit...

AI Technical Summary

Problems solved by technology

However, the excitation magnetic field of rare earth permanent magnets cannot be adjusted, so it restricts the popularization and application of permanent magnet motors to a certain extent.

For example, permanent magnet generators, when their load or speed changes, it is difficult for such generators to maintain a constant voltage, which greatly restricts their application, especially in areas that require high power supply quality; It is difficult for a magnetic motor to output a large torque when starting or at a low speed; it is difficult to adjust the torque-speed characteristic at high speed, and it cannot maintain constant power operation and a wider speed range, so it is difficult for permanent magnet synchronous motors to operate Electric drive systems (such as electric drive ships, electric locomotives, etc.) are popularized in fields that require high overload capacity and speed regulation range

There are still some problems in the utilization of space structure of these motors. Large-capacity motors cannot make full use of the space structure, and the space utilization rate is small.

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