Permanent magnet electric transmission system of urban trolley car

A tram and electric transmission technology, applied in the direction of electric locomotive, AC induction motor traction, locomotive, etc., can solve the problems of unable to detect system operation data in real time, limited capacity of tram DC power grid capacity, etc., to avoid further expansion of faults , Satisfy the effect of operation reliability and protection circuit safety

Inactive Publication Date: 2017-03-15
CRRC YONGJI ELECTRIC CO LTD
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  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problem that the existing AC asynchronous system has limited capacity of the tram DC power grid and can

Method used

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  • Permanent magnet electric transmission system of urban trolley car
  • Permanent magnet electric transmission system of urban trolley car
  • Permanent magnet electric transmission system of urban trolley car

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Embodiment Construction

[0014] A permanent magnet electric transmission system for an urban tram, comprising a high-speed fuse, a high-voltage switch box 2, a filter reactor 3, a braking resistor 4, a traction inverter 5, a CAN network communication device 6, a deceleration device 7, a permanent magnet The traction motor 8 and the high-voltage isolating switch 9, the input end of the traction inverter 5 are respectively connected with the braking resistor 4, the CAN network communication device 6 and one end of the filter reactor 3, and the other end of the filter reactor 3 passes through the high-voltage switch box 2 Connected with a high-speed fuse, the traction inverter 5 includes a pre-charging unit, a brake chopper unit, a filter unit, an inverter unit A, an inverter unit B and a control unit, and the output of the inverter unit A passes through a high-voltage isolation switch 9 is connected to the input end of one of the permanent magnet traction motors 8, the output end of the inverter unit B i...

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Abstract

The invention particularly discloses a permanent magnet electric transmission system of an urban trolley car, and solves the problem that the operating data of the existing alternating current asynchronous system cannot be detected in real time because the electrical network capacity of an electric car direct current power station is limited. The input terminal of a traction invertor is respectively connected with a brake resistor, a CAN network communication device and one terminal of a filter reactor; the other terminal of the filter reactor is connected with a high-speed fuse; the traction invertor comprises a pre-charge unit, a braking chopping unit, a filtering unit, an inverter unit A, an inverter unit B and a control unit; the output terminal of the inverter unit A is connected with the input terminal of one permanent magnet traction motor; the output terminal of the inverter unit B is connected with the input terminal of the other permanent magnet traction motor; the output terminals of the permanent magnet traction motors are respectively connected with the input terminals of corresponding reduction gears; the output terminals of the reduction gears are connected with a wheel track. The permanent magnet electric transmission system improves the energy saving rate by 18 to 44 percent, is long in the service life of a winding, and improves the operability and the safety of the system.

Description

technical field [0001] The invention is used in the field of urban trams, and specifically relates to a permanent magnet electric transmission system for urban trams. [0002] technical background [0003] The electric drive system of trams was originally a DC drive system powered by a DC motor. Because of the complex structure of the DC motor, high maintenance costs, and inconvenient maintenance, the DC drive system urgently needs to be improved and upgraded. Since 2008, the asynchronous electric drive system has gradually replaced the DC system due to its small system size, large output, easy maintenance and renovation, improved reliability, and added electric braking and feeder functions. [0004] With the increase of online vehicles in the AC asynchronous system, the grid capacity of the tram DC power station cannot support more AC asynchronous systems running online at the same time. When one motor of the asynchronous system fails, the single motor cannot provide the max...

Claims

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Application Information

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IPC IPC(8): B60L9/18B61C3/00
CPCB60L9/18B60L2200/26B61C3/00
Inventor 李彩霞刘荣强张利娟高锦慧詹哲军黄俊平胡肖飞
Owner CRRC YONGJI ELECTRIC CO LTD
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