A synchronous/asynchronous compound double fundamental frequency motor

A compound, fundamental frequency technology, applied in the field of vehicle electric transmission, can solve the problems of large capacity and high cost of motors and controllers

Active Publication Date: 2018-09-25
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to meet the power demand in the high-speed area, the design of the asynchronous motor for vehicles must have a certain degree of power margin, which results in excessively large capacity and high cost of the motor and controller

Method used

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  • A synchronous/asynchronous compound double fundamental frequency motor

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Embodiment Construction

[0013] The present invention provides a synchronous / asynchronous composite dual-base frequency motor, as attached figure 1 As shown, it specifically includes: stator core 1, stator winding 2, squirrel cage 3, permanent magnet 4, rotor core 5, magnetic isolation slot 6 and rotating shaft 7; wherein, the rotor core 5 is arranged around the rotating shaft 7 , the stator core 1 is arranged outside the rotor core 5; the permanent magnets 4 are embedded inside the rotor core 5 and arranged radially along the radial direction of the rotating shaft 7; There are two grooves, guide bars are arranged in the grooves, and short-circuit rings are arranged at both ends of the rotor core in the axial direction, forming a squirrel cage 3 with the guide bars.

[0014] In a preferred embodiment of the present application, a magnetic isolation slot is provided at one end of the permanent magnet 4 close to the rotating shaft 7 .

[0015] In a preferred embodiment of the present application, the s...

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Abstract

The invention relates to the field of vehicle electric drive technologies, in particular to a synchronous / asynchronous combined type double fundamental frequency motor. The synchronous / asynchronous combined type double fundamental frequency motor comprises a stator winding, wherein a double fundamental frequency current is supplied into the stator winding; a rotor adopts a tangential structure with built-in permanent magnets, and designs corresponding magnetism isolating grooves for reducing a magnetic leakage coefficient; in addition, grooves are formed in the surface of the rotor, guide bars are embedded in the grooves, and the guide bars are short-circuited to form a squirrel cage by means of short-circuit rings at both ends of the rotor. In the driving process, the synchronous motor and asynchronous motor characteristics are utilized simultaneously, and a motor driving system is ensured to satisfy the tractive characteristic requirement of electric vehicles through double fundamental frequency winding current control. The synchronous / asynchronous combined type double fundamental frequency motor provided by the invention has the advantage of high power density, can significantly reduce the size of a motor controller under the condition of satisfying the tractive characteristic requirement of electric vehicles, further improves power density of the motor driving system, and is a good choice of motor drive system for the electric vehicles.

Description

technical field [0001] The invention belongs to the technical field of vehicle electric transmission, and in particular relates to a synchronous / asynchronous compound double fundamental frequency motor. Background technique [0002] At present, the drive motors for electric vehicles are generally permanent magnet synchronous motors or asynchronous motors, but due to the limitations of their own characteristics, the torque-speed characteristics of these two motors cannot completely match the traction characteristics of the vehicle, and it is difficult to meet the requirements of the further development of electric vehicles. Demand for higher power density in motor drive systems. [0003] The permanent magnet synchronous motor weakens the permanent magnet magnetic field by controlling the direct-axis demagnetization magnetomotive force generated by the direct-axis current component, thereby maintaining the balance of the motor terminal voltage during high-speed operation. How...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02K1/27H02K17/16H02P21/00
CPCH02K1/22H02K1/274Y02T10/64
Inventor 张承宁刘海鹏董玉刚杨永喜
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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