阅读说明：本技术 牵引及再生制动模式的交流机车的牵引变流器 (Traction converter for AC locomotive in traction and regenerative braking mode ) 是由 奥列格·瓦列耶维奇·梅尔尼琴科 亚历山大·尤里耶维奇·波特诺伊 谢尔盖·根纳迪耶维奇·什拉姆科 于 2018-06-01 设计创作，主要内容包括：本发明涉及变流器技术,并且旨在用作交流机车的牵引变流器。技术效果是提高了功率因数,并且在牵引及再生制动模式下平稳调节换向器电动机的电压。机车的牵引变流器连接至牵引变压器,并且包括：可控桥,该可控桥连接至牵引变压器的次级绕组的区段；以及二极管臂,该二极管臂可通过一组接触器连接至牵引变压器的次级绕组的其余输出,形成n个调节区。在牵引模式下,换向器电动机是负载；在再生制动模式下,换向器电动机是发电机,其中将电力独立地从励磁整流单元提供给励磁绕组。(The present invention relates to converter technology and is intended to be used as a traction converter for an ac locomotive. The technical effect is to improve the power factor and to smoothly regulate the voltage of the commutator motor in traction and regenerative braking modes. A traction converter of the locomotive is connected to the traction transformer and comprises: a controllable bridge connected to a section of the secondary winding of the traction transformer; and a diode arm connectable to the remaining outputs of the secondary winding of the traction transformer through a set of contactors, forming n regulation zones. In traction mode, the commutator motor is a load; in the regenerative braking mode, the commutator motor is a generator in which electric power is independently supplied from the field rectifier unit to the field winding.)

1. A traction converter for an alternating current locomotive in traction and regenerative braking mode, said traction converter being connected to a multi-winding traction transformer, having a load in the form of a commutator motor, characterized in that one winding of said traction transformer is connected to a controllable bridge based on IGBT-transistors and is configured to smoothly regulate the voltage in said commutator motor by varying the on-time and off-time of the IGBT transistors of said controllable bridge within each voltage half-cycle; the subsequent secondary winding of the traction transformer is connected via diode arms for use with a contactor, thereby forming n control zones; the field winding of the commutator motor is designed to be connected to a field rectifier unit.

Technical Field

The invention relates to electrical engineering, in particular to converter installations, and is intended for use as a traction converter in ac electrical stores.

Background

It is known that VL80T, VL80S alternator (VL80, bondarko, edited by b.r.bondarko, M.: transporter, 1977, page 368, VL80 567 electric locomotive, operation manual/n.m.vaskoo, a.s.devytkov, a.f.kucherovo, etc.), -second edition, revised and supplemented, M: tranport, 1990, page 454, 315, 26 tables (zha, ga, etc.) zha, arga, zhakta 80, zhakkya, etc.. girald, zhakba, etc.. kayaka, girakba, etc.. kayaka, etc.. kagi, ge, etc.. kagi, etc.. wo, ge, etc.. wo, pa, ge, pa, a.fa у ч e zhao, 2- з, an ei zhao, e g e g a, ei e g a, i e i. The cell uses a diode as an uncontrolled rectifier connected according to a well-known bridge circuit. To change the speed of the electric locomotive, the segments of the traction transformer secondary winding are switched by the main controller, changing the rectified voltage of the traction motor's commutator. The disadvantages of the electric locomotive are the stepwise control of the rectified voltage and the use of the variable resistance brake.

A multi-zone rectifier-inverter converter (RU2498490C1, 10.11.2013) (prototype) for an ac locomotive with a commutator traction motor is known. This converter includes: an arm of a circuit based on IGBT transistors and forming a full-wave bridge rectifier; and an additional diode arm connected in parallel to the rectifying current circuit. A method (RU 2573821C2, 27.01.2016) for controlling a multi-zone rectifier-inverter converter in a regenerative braking mode is known, which enables a high power factor to be achieved in this mode. The main disadvantage of this converter is the high cost due to the large number of advanced IGBT transistors used.

Disclosure of Invention

A traction converter for an alternating current locomotive in traction and regenerative braking mode, connected to a multi-winding traction transformer, with a load in the form of a commutator motor, characterized in that one winding of the traction transformer is connected to a controllable bridge based on IGBT-transistors and is configured to smoothly regulate the voltage in the commutator motor by varying the on-time and off-time of the IGBT transistors of the controllable bridge within each voltage half-cycle; the subsequent secondary winding of the traction transformer is connected via diode arms for use with the contactor, thereby forming n control zones; the field winding of the commutator motor may be connected to a field rectification unit.

Drawings

Fig. 1 shows a schematic diagram of an electric locomotive with the proposed ac traction converter configured in traction mode.

Detailed Description

The circuit comprises: a traction converter (23) comprising a controllable arm (2 … … 5) constituted by an IGBT transistor and a series diode connected to the secondary winding I of a Traction Transformer (TT) (22); diode arms (6, 7); contactors (15, 16) configured to switch an operation mode (traction/regeneration) of the electric locomotive; a contactor (17 … … 20) configured to switch on and off a secondary winding section (II, III, IV, V, n) of the Traction Transformer (TT); a current collector (pantograph) (21); an armature winding of a commutator traction motor (1); a unit (8) of ballast resistors (UBR); an Excitation Winding (EW) (9); excitation Rectifier Unit (ERU) (10): contactors (11, 13) for connecting a ballast resistor (UBR) in a regeneration mode; contactors (12, 14) for switching an Excitation Winding (EW) from a traction mode to a regeneration mode.

In the traction mode, the field winding (EW) is connected in series to the armature winding 1 through contactors 12, 14. Contacts 15, 16 are used to connect diode arms 6 and 7. Arm 2 … … 5 is connected to the secondary winding I of traction transformer 22; by closing the respective contactor 17 … … 20 and forming n control zones, the voltage across the commutator motor is increased by connecting the secondary windings (II, III, IV, V, n) one after the other. The voltage supplied to the commutator motor in the first zone is smoothly controlled by arm 2 … … 5 and in the higher zone by arms 2 and 3.

In regenerative braking mode, the field winding (EW) is connected to the field rectifier unit (ERU) (10) through contactors 12, 14. Contactors 15, 16 are opened and a ballast resistor (UBR) (8) is connected to the circuit through contactors 11, 13. Arm 2 … … 5 is connected to the secondary winding I of traction transformer 22, which are used to smoothly control the traction motor voltage. The contactor 17 … … 20 is opened.

The technical effect is that the power factor provided in the traction and regenerative braking modes is comparable to that of the IGBIN-transistor based rectifier-inverter converter (RU2498490C1, 10.11.2013; RU2573821C2, 27.01.2016) and provides smooth regulation of the commutator motor voltage and a smaller number of semiconductor devices in the traction converter circuit.