Permanent Magnet Direct-drive Electric Locomotive for Passenger Operations

Updated: 2022-03-04

Product introduction

Permanent Magnet Direct-drive Electric Locomotive for Passenger Operations

  CRRC Datong Co., Ltd. (hereinafter referred to as "CRRC Datong") has taken the lead in carrying out application research of permanent magnet direct drive technology on high-power electric locomotives at home and abroad, and developed the first high-power permanent magnet direct-drive electric locomotive for passenger operations in China. The locomotive adopts "permanent magnet motor + direct drive mechanism" to replace the traditional "asynchronous motor + gearbox drive mechanism", which is characterized by high efficiency, energy saving, environmental protection and long maintenance period.

Application Scenario

  The application of permanent magnet direct drive technology improves the drive efficiency of high-power electric locomotives. The direct drive wheelset drive system has no gearbox assembly, which improves the reliability and maintainability of the drive system. The direct drive coupling is simple in structure, convenient for assembly and disassembly, and maintenance-free as a whole. After the technical achievements are fully mature, they will be popularized and applied to the international and domestic locomotive markets. This type of locomotive is completely independent in design, and CRRC Datong has completely independent intellectual property rights. The successful application of this type of locomotive will make the technical level of China's high-power electric locomotive reach the international leading level. It is another major technological leap after replacing DC drive with AC drive, and leads the technical development direction of rolling stock in the future.

Key technologies

  Permanent magnet direct drive technology combines the permanent magnet traction motor and direct drive mechanism together, replacing the traditional asynchronous motor gearbox drive mechanism. Its advantages are mainly reflected in high efficiency (vehicle test efficiency reaches above 0.9), good maintenance performance (maintenance-free during C6 maintenance of drive unit) and environmental friendliness (no consumables such as gear oil and rubber parts, and lower noise).

Main technical parameters

 

Name

Content

Performance parameter

Drive mode

AC-DC-AC

Axle arrangement

C0-C0

Axle load

21t

Maximum design speed

160km/h

Nominal power

7200kW

Speed range at constant power

80~160 km/h

Continuous speed

80km/h

Continuous traction force

324kN

Starting traction force

420kN

Overall locomotive efficiency

≥0.9

Structural parameters

Length of underframe

21744mm

Body width

3000mm

Body height

4130mm

Body width

3000mm

Center distance between front and rear couplers

23260mm

Distance between bogie centers

11680mm

Bogie wheelbase

3500mm