A method for suppressing temperature rise of asynchronous motor bearings for AC-DC-AC electric multiple units

A technology for asynchronous motors and EMUs, applied in electric vehicles, motor vehicles, power management, etc., can solve problems such as load imbalance

Active Publication Date: 2021-02-02
XIAN YONGDIAN ELECTRIC
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a method for suppressing the temperature rise of asynchronous motor bearings for AC-DC-AC electric multiple units, which solves the problem of unbalanced load in the vehicle control mode

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A method for suppressing temperature rise of asynchronous motor bearings for AC-DC-AC electric multiple units
  • A method for suppressing temperature rise of asynchronous motor bearings for AC-DC-AC electric multiple units
  • A method for suppressing temperature rise of asynchronous motor bearings for AC-DC-AC electric multiple units

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0024] The present invention is described in further detail below in conjunction with accompanying drawing:

[0025] Such as figure 1 As shown, the vehicle control structure of AC-DC-AC EMU 2 wholes and 1 inverter includes a large plate, a pre-charging module, a four-quadrant rectifier module, a chopper module, a grounding detection module, and an inverter module. The pre-charging module includes a charging resistor R1, The pre-charging contactor K11, the main contactor K1, the pre-charging module 1 and the pre-charging module 2 have the same structure.

[0026] The four-quadrant rectifier module includes four switching tubes g1, g2, g3, and g4. The four-quadrant rectifier module 1 and the four-quadrant rectifier module 2 have the same structure.

[0027] The chopping module includes a chopping switch tube g5, a chopping current sensor A2, a reverse diode D1, and a chopping resistor R5.

[0028] The ground detection module includes resistors R3 and R4, and the resistance of ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention relates to a method for inhibiting the temperature rise of a motor bearing by a traction converter of alternating current-direct current-alternating current electric multiple units. Themethod comprises the following steps that rotate speed signals of speed 1, speed 2, speed 3 and speed 4 of four motors and a vehicle speed signal n of a whole vehicle are detected in real time, and absolute values of the difference values of n-speed 1, n-speed 2, n-speed 3 and n-speed 4 are calculated correspondingly; if the absolute value of the difference value of any one is greater than a preset threshold signal Fset, actual torque given values of the motors are reduced by 10%, otherwise, the actual torque given values of the motors are increased by 10%; and the motor torque values subjected to the increase and decrease judgment is subjected to torque limiting processing and then is used as an actual torque output value Te, and meanwhile, the actual torque output value Te is compared with a given motor torque value Te *, and a smaller value is taken as the actual given value of the motor torque, and as the motor actual torque given value in the next judgment period. According to themethod, the problem that the alternating current-direct current-alternating current electric multiple units is in a low speed state and the motors are in a serious overload state due to load distribution imbalance caused by the problems such as wheel diameters and adhesion is solved, and the temperature rise of the motor bearing is effectively inhibited.

Description

technical field [0001] The invention belongs to the technical field of asynchronous motor bearing temperature control, and in particular relates to a method for suppressing the temperature rise of an asynchronous motor bearing for an AC / DC / AC electric train set. Background technique [0002] After years of high-speed railway construction, our country has a well-developed railway network, which is now the top in the world. The railway network extending in all directions connects all parts of China into one. [0003] In order to save the space of the train body and reduce the purchase cost of the train, the traction drive system of the EMU widely adopts the vehicle control method, and one traction converter drives all the traction asynchronous motors connected in parallel in the same EMU. This control method reduces the use of power devices, Simplifies the control structure, but also brings a series of problems. [0004] Due to manufacturing errors and EMU wheelset wear to va...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Patents(China)
IPC IPC(8): B60L15/20B60L15/32
CPCB60L15/20B60L15/32B60L2200/26B60L2240/12B60L2240/421B60L2240/423B60L2240/425Y02T10/72
Inventor 牛剑博张瑞峰赵晨凯王龙刚宋志鹏詹哲军
Owner XIAN YONGDIAN ELECTRIC
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap