Surrounding type secondary winding and fault-tolerant operation motor stator structure

Abstract

The invention discloses a surrounding type secondary winding and fault-tolerant operation motor stator structure, which comprises a motor shell, a stator core and a surrounding type winding. The motor shell is a layered shell and comprises an inner-layer shell, and the inner-layer shell is a magnetic conduction shell; the magnetic conduction shell is connected and fixed with the stator iron core through distributed magnetic conductive connecting columns; the two sides of each surrounding winding are provided with magnetic conductive connecting columns. The stator iron core, the magnetic conductive connecting columns and the magnetic conductive machine shell form a magnetic circuit. An energy storage oscillation device is arranged between each surrounding winding and the motor shell; the energy storage oscillation device is an energy storage oscillation circuit formed by connecting a secondary coil winding and a capacitor; secondary coil windings in the energy storage oscillating circuit are wound on the magnetic conductive casing and are in one-to-one correspondence with the wound windings of the motor in position; and the capacitors are placed beside the corresponding secondary coil windings. The secondary winding is used for storing magnetic leakage energy of the motor, storage discharging is carried out, and self-fault-tolerant operation of the motor is achieved.

Description

technical field [0001] The invention relates to the technical field of electric motors, in particular to a surrounding secondary winding and a fault-tolerant motor stator structure. Background technique [0002] Surround windings are mainly used in the field of high-speed motors. High-speed permanent magnet motors have the advantages of small size, low noise, fast dynamic response, high power density, and high efficiency of the transmission system. They have become key motor equipment for distributed energy supply systems of micro gas turbines. In some important fields such as aerospace and military industry, it can also be used as an independent power supply or a small power station to make up for the shortage of centralized power supply. The reliability and fault-tolerant operation capability of the system are required to be higher. In addition, due to the characteristics of high-speed operation, once the motor fails, it is easy to cause serious accidents and cause huge e...

AI Technical Summary

Problems solved by technology

In addition, due to the characteristics of high-speed operation, once the motor fails, it is easy to cause serious accidents and cause huge economic losses. Research on fault-tolerant operation of high-speed motors has become an important means to improve the reliability and safety of high-speed motor systems

[0003] Half of the winding of the wraparound winding is located at the back of the stator, and the magnetic flux leakage of the winding at the back of the stator is difficult to utilize, which will cause low utilization of the winding and the magnetic flux leakage of the winding will have an adverse effect

Traditional three-phase winding motors cannot continue to operate after a fault, and the reliability is limited

Increasing the number of motor phases, such as adopting five-phase, seven-phase or dual-three-phase structure, can increase the redundancy of motor control. After the motor fails, such as a phase disconnection, there are still enough degrees of freedom in the number of phases to ensure the operation of the motor. Troubleshooting to gain time, although this method can ensure that the motor continues to run after the fault, but the multi-phase winding motor will increase the difficulty of motor control and complicate the system, and it is difficult for multi-phase motors to ensure high-speed operation of the motor

[0004] The above technical solution discloses some fault-tolerant solutions, but the development of the winding function on the back of the stator yoke is relatively lacking, and it cannot adapt to and solve the problem that half of the windings of the wrap-around winding are located on the back of the stator, resulting in low utilization of the winding and adverse effects of winding magnetic flux leakage. , and cannot achieve adaptive fault-tolerant operation

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