CN203166798U

CN203166798U - Speed regulation frequency converter special for trolley locomotive

Info

Publication number: CN203166798U
Application number: CN201320088184.2U
Authority: CN
Inventors: 俞晓阳; 齐强兵; 任修勇
Original assignee: XIANGTAN ELECTRIC LOCOMOTIVE FACTORY CO Ltd
Current assignee: XIANGTAN ELECTRIC LOCOMOTIVE FACTORY CO Ltd
Priority date: 2013-02-27
Filing date: 2013-02-27
Publication date: 2013-08-28
Anticipated expiration: 2023-02-27

Abstract

A speed regulation frequency converter special for trolley locomotive belongs to a locomotive frequency converter and mainly solves the technical problems that the existing frequency converter is high in energy consumption, unstable in output, and not perfect in protection measures. A three-phase pulse-width regulation signal is generated by a fixed-point microcomputer controller (1) through software control, an insulation grid bipolar transistor (3) is driven by an insulation grid bipolar type transistor driving panel (2), a three-phase pulse-width modulation voltage is generated to drive an alternative current motor, the current of a locomotive is detected by a Holzer current sensor, the dynamic flux control and the torque current closed-loop control are performed by the current vector transform, the voltage space vector pulse-width modulation signal is generated, the locomotive is draught, the feedback brake is realized, and simultaneously the reverse operation of the locomotive is realized in a software way, thereby realizing the contactless control of the locomotive. When a protection circuit detects overcurrent of the locomotive, the control signal is immediately locked by hardware and the system is protected. The frequency converter is mainly used for the trolley locomotive.

Description

Trolley locomotive speed governing special converter

Technical field

The utility model relates to a kind of frequency converter, particularly a kind of trolley locomotive speed governing special converter.

Background technology

At present, China is mining dc electric formula electric locomotive, general what adopt is complex structure, involve great expense, moisture resistivity is poor, failure rate height, DC motor transmission that maintenance cost is big.Governing system still adopts traditional resistor decompression speed mode to realize speed-regulating function, its device structure complexity, and sub-assembly all is to work under the contact switch state, because frequent movement cause reduce the useful life of poor contact of contacts and device, and noise is bigger.Not only maintenance capacity is big for this traditional mode of speed regulation, and because of the strip resistance operation, has caused the significant wastage of electric energy.

The utility model content

The purpose of this utility model provides a kind of contactless control; can by driver controller realize locomotive forward, backward, starting, traction, feedback electric braking; have perfect overcurrent, current limliting, overvoltage, under-voltage protection measure; can export specified 2 times of torques; start level and smooth non-jitter, energy-efficient trolley locomotive speed governing special converter.

The technical scheme that its technical problem that solves the utility model adopts is: it comprises controller, current sensor, alternating current machine, it is characterized in that: controller connects microcomputerized controller 1, microcomputerized controller 1 is connected with induction coil by rectifier with insulated gate bipolar transistor drive plate 2 and is parallel with two or more resistance, insulated gate bipolar transistor drive plate 2 is provided with seven or seven above insulated gate bipolar transistors 3, insulated gate bipolar transistor 3 is connected with alternating current machine, alternating current machine is provided with current sensor, and current sensor links to each other with microcomputerized controller 1.

Microcomputerized controller 1 described in the utility model can adopt the TMS320LF2407A model.

Current sensor described in the utility model can adopt Hall current sensor.

Microcomputerized controller 1 described in the utility model is provided with and comprises and start stop key 4, just change reverse key 5, reset key 6, temperature switch 7, ready lamp 8, running indicator 9, alarm lamp 10, time-delay reset box 11, the given key 12 of speed and fan 13.

The beneficial effects of the utility model are: safeguard measure is perfect, and output is stable, starts level and smooth, energy-efficient.

Description of drawings

Fig. 1 is master control borad schematic diagram of the present utility model.

Fig. 2 is main electrical equipment principle schematic of the present utility model.

Among the figure: the 1-microcomputerized controller, 2-insulated gate bipolar transistor drive plate, the 3-insulated gate bipolar transistor, 4-stop key, 5-are just changeing reverse key, 6-reset key, 7-temperature switch, 8-ready lamp, 9-running indicator.The 10-alarm lamp, 11-time-delay reset box, the given key of 12-speed, 13-fan.

Embodiment

Below in conjunction with drawings and Examples the utility model is described in further details.

Embodiment 1; the utility model comprises controller; current sensor; alternating current machine; it is characterized in that: controller connects microcomputerized controller 1; microcomputerized controller 1 is connected with induction coil by rectifier with insulated gate bipolar transistor drive plate 2 and is parallel with two or more resistance; insulated gate bipolar transistor drive plate 2 is provided with seven or seven above insulated gate bipolar transistors 3; insulated gate bipolar transistor 3 is connected with alternating current machine; alternating current machine is provided with current sensor; current sensor links to each other with microcomputerized controller 1; when receiving the controller instruction; microcomputerized controller 1 produces the three-phase pulse width modulated signal by software control; drive insulated gate bipolar transistor 3 through insulated gate bipolar transistor drive plate 2 again; produce three-phase pulse width modulated voltage and drive alternating current machine; pass through current sensor; detect current of electric; by the current phasor conversion; carry out dynamic flux regulator and torque current closed-loop adjustment; produce the space vector of voltage pulse-width signal; the traction of realization motor; regenerative braking; realize the motor inverted running by software mode simultaneously; thereby realize the contactless control of motor; when protective circuit detects over current of motor; hardware lockout control signal at once realizes system protection.Consult Fig. 1 to Fig. 2.

Embodiment 2, microcomputerized controller 1 described in the utility model can adopt the TMS320LF2407A model, core algorithm is that the state-of-the-art DTC technology of present frequency converter industry and VVVF algorithm are combined, DTC and the VVVF core control technology better effects if more independent than common frequency converter.Consult Fig. 1 to Fig. 2, all the other are with embodiment 1.

Embodiment 3, and current sensor described in the utility model can adopt Hall current sensor, better detect current of electric, by the current phasor conversion, carry out dynamic flux regulator and torque current closed-loop adjustment.Consult Fig. 1 to Fig. 2, all the other are with above-mentioned embodiment.

Embodiment 4, microcomputerized controller 1 described in the utility model is provided with and comprises and start stop key 4, just change reverse key 5, reset key 6, temperature switch 7, ready lamp 8, running indicator 9, alarm lamp 10, time-delay reset box 11, the given key 12 of speed and fan 13, make the operating efficiency of microcomputerized controller 1 higher, use more convenient.Consult Fig. 1 to Fig. 2, all the other are with above-mentioned embodiment.

Embodiment 5, the utility model also can with the supporting use of the electric locomotive used frequency converter controller of mining GENERAL TYPE, constitute the frequency control electric-control system jointly, finish speed regulating control functions such as train starting, acceleration, braking.Consult Fig. 1 to Fig. 2, all the other are with above-mentioned embodiment.

Claims

1. A special frequency converter for speed regulation of wire-type electric locomotives, which includes a controller, a current sensor, and an AC motor, and is characterized in that: the controller is connected to a microcomputer controller (1), and the microcomputer controller (1) is insulated from The gate bipolar transistor driver board (2) is connected through a rectifier and an induction coil and two or more resistors are connected in parallel, and seven or more insulated gate bipolar transistor driver boards (2) are provided with seven or more insulated gate bipolar transistor driver boards (2). The polar transistor (3) and the insulated gate bipolar transistor (3) are connected to the AC motor, the AC motor is provided with a current sensor, and the current sensor is connected to the microcomputer controller (1).

2. The dedicated frequency converter for speed regulation of wire-type electric locomotive according to claim 1, characterized in that: the microcomputer controller (1) can adopt the model TMS320LF2407A.

3. The special frequency converter for speed regulation of trolley electric locomotive according to claim 2, characterized in that: the current sensor can be a Hall current sensor.

4. The dedicated frequency converter for speed regulation of wire-type electric locomotives according to claim 3, characterized in that: the microcomputer controller (1) is provided with start and stop keys (4), forward and reverse rotation keys (5) , reset key (6), temperature switch (7), ready light (8), running light (9), alarm light (10), delay reset box (11), speed given key (12) and fan (13 ).