Brake device and brake method of AC-DC-AC traction transmission system

A technology of traction drive and braking device, which is applied in the field of motor drive and power electronics, can solve problems such as the inability to guarantee the stable braking of the motor, and achieve the effect of simple and practical energy consumption braking, simple control, and suppression of voltage pumping

Inactive Publication Date: 2018-01-23
BEIJING JIAOTONG UNIV +1
View PDF12 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This braking method cannot guarantee the stable braking of the mot

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
  • Brake device and brake method of AC-DC-AC traction transmission system
  • Brake device and brake method of AC-DC-AC traction transmission system
  • Brake device and brake method of AC-DC-AC traction transmission system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0038] The following combination Figure 8 The AC-side braking device of the AC-DC-AC traction transmission system of the present invention will be described.

[0039]The AC-side braking device of the AC-DC-AC traction drive system includes a transformer 81, a diode uncontrolled rectifier 82, an inverter 83, an AC motor 84, a supporting capacitor 85, a thyristor phase-controlled rectifier 86, an inductor 87, a resistor 88, and a DC voltage detection unit 89. A motor current detection unit 810 and a controller 811. Among them, the transformer 81, the diode uncontrolled rectifier 82, the inverter 83, the AC motor 84, and the supporting capacitor 85 constitute the main circuit of the AC / DC traction transmission system, and the thyristor rectifier 86, the inductor 87, and the resistor 88 constitute the braking circuit of the traction transmission system. The DC voltage detection unit 89 and the motor current detection unit 810 respectively sample the DC side voltage and the curre...

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 provides an AC-side brake device and brake method of an AC-DC-AC traction transmission system. The AC-side brake device of the AC-DC-AC traction transmission system comprises a thyristorphase control rectifier, an inductor, a resistor, a DC voltage detection unit, a motor current detection unit and a controller. The method comprises the steps of connecting the thyristor phase control rectifier to a three-phase output end of an inversion module, and connecting the inductor and the resistor which are connected in series to an output end of the thyristor phase control rectifier; and sending a DC-side voltage and a motor current which are obtained by sampling to the controller, respectively outputting a pulse signal and a phase control angle signal to the inversion module and the thyristor phase control rectifier by the controller through a control algorithm, and controlling a three-phase AC motor to run by the inversion module. By the device and the method, a four-quadrantrectifier is not needed, breaking can be achieved at an AC side, and the AC motor is in a controllable brake state; and when the device is applied to a cascaded H-bridge traction transmission system,a brake unit is unnecessary to be additionally arranged at each H-bridge power unit, only the brake unit comprising the thyristor phase control rectifier, the inductor and the resistor is needed to beadditionally arranged at an input end of the motor, and energy consumption braking is simple and practical.

Description

technical field [0001] The invention relates to the field of motor transmission and power electronics technology, in particular to an energy consumption braking device and a braking method for an AC motor working under regenerative braking conditions in an AC / DC / AC traction drive system. Background technique [0002] AC-DC-AC traction drive systems are widely used in industries, such as steel, petroleum, textile, rail transit and other fields, and the power range of their applications is also very wide, ranging from several kilowatts to megawatts. The vast majority of AC-DC-AC traction drive systems use voltage-type converters. The main structure of the traction drive system is as follows: figure 1 shown. The primary side of the transformer 11 is connected to the power grid, and the secondary side is connected to the rectifier 12. The rectifier 12 converts the three-phase alternating current into direct current. The direct current side of the rectifier 12 is connected to th...

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
IPC IPC(8): H02P3/22
Inventor 王琛琛郑艳文苟立峰
Owner BEIJING JIAOTONG UNIV
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