CN103856144A - Frequency converter for overhead line electric locomotive - Google Patents
Frequency converter for overhead line electric locomotive Download PDFInfo
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- CN103856144A CN103856144A CN201410121631.9A CN201410121631A CN103856144A CN 103856144 A CN103856144 A CN 103856144A CN 201410121631 A CN201410121631 A CN 201410121631A CN 103856144 A CN103856144 A CN 103856144A
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- circuit
- controller
- detection circuit
- frequency converter
- igbt inverter
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Abstract
The invention discloses a frequency converter for an overhead line electric locomotive. The frequency converter comprises a rectifying circuit, a driving circuit, an IGBT (Insulated Gate Bipolar Transistor) inverter circuit, a voltage detection circuit, a current detection circuit, a rotary speed detection circuit, a communication circuit, a controller and a display screen, wherein a three-phase alternating current is sent to the input terminal of the rectifying circuit; the output terminal of the rectifying circuit is respectively connected with the input terminals of the IGBT inverter circuit and the voltage detection circuit; the output terminal of the IGBT inverter circuit is connected with a motor; the input terminal of the driving circuit is connected with the controller; the output terminal of the driving circuit is connected with the IGBT inverter circuit; the output terminal of a driving power module is connected with a PWM (Pulse Width Modulation) isolating and driving circuit; the input terminal of the current detection circuit is connected with the output terminal of the IGBT inverter circuit; the input terminal of the rotary speed detection circuit is connected with the motor; the voltage detection circuit, the current detection circuit and the rotary speed detection circuit are respectively connected with the controller; the communication circuit and the display screen are connected with the controller. The controller is used for controlling the work of the frequency converter, so that the torque control performance of the motor is improved. Thus, the speed of the overhead line electric locomotive can be adjusted in a large range.
Description
Technical field
The present invention relates to a kind of frequency converter, particularly a kind of trolley locomotive frequency converter.
Background technology
Drive speed governing field at mine electric locomotive, due to the needed large electric current of its production requirement, high power, so traditional trolley locomotive type of drive is mainly taking silicon rectifier and SCR controlled rectifier as main, rectifier type power supply is reliable, technical comparative maturity, but equipment volume is huge, heavy, energy consumption is high, efficiency is low, and due to its reasons in structure, dynamic characteristic aspect also not ideal enough RHVC to have volume little, efficiency is high, technology content is higher, the advantage that added value is high, but mining hoist electric locomotive frequency converter operational environment is more severe, the speed regulating device of existing frequency conversion exist switching loss large, high order harmonic component can cause the problem of electric network pollution.
Summary of the invention
The above-mentioned technical problem existing in order to solve existing Electric Machine Control, the invention provides that a kind of reliability is high, good stability, trolley locomotive frequency converter that efficiency is high.
The technical scheme that the present invention solves the problems of the technologies described above is: a kind of trolley locomotive frequency converter, comprises rectification circuit, drive circuit, IGBT inverter circuit, voltage detecting circuit, current detection circuit, speed detect circuit, telecommunication circuit, controller, display screen, described three-phase alternating current is delivered to the input of rectification circuit, the output of rectification circuit connects respectively IGBT inverter circuit, the input of voltage detecting circuit, the output termination motor of IGBT inverter circuit, the input termination controller of drive circuit, the output termination IGBT inverter circuit of drive circuit, the output of driving power module connects PWM isolation and drive circuit, the output of the input termination IGBT inverter circuit of current detection circuit, the input termination motor of speed detect circuit, voltage detecting circuit, current detection circuit, speed detect circuit connects respectively controller, telecommunication circuit, display screen is connected with controller.
In the electric locomotive used frequency converter of upper stringing formula, described controller adopts TMS320F2812A controller.
In the electric locomotive used frequency converter of upper stringing formula, described current detection circuit adopts Hall element.
Technique effect of the present invention is: 1) environmental suitability is strong, reliability is high, and anti-salt, protection against the tide, dustproof, explosion-proof, be applicable to the severe occasion of the environment such as mine; 2) adopt digital AC induction motor control technology.Electric current loop, speed ring full-digital control, adjusting speed accuracy is high, wide ranges, economize on electricity more than 50% than traditional direct current resistive mode of speed regulation, stable and reliable operation.
Brief description of the drawings
Fig. 1 is structured flowchart of the present invention.
Fig. 2 is the electrical schematic diagram of the IGBT inverter circuit in the present invention.
Referring to Fig. 1, the present invention includes and comprise rectification circuit, drive circuit, IGBT inverter circuit, voltage detecting circuit, current detection circuit, speed detect circuit, telecommunication circuit, controller, display screen, described three-phase alternating current is delivered to the input of rectification circuit, the output of rectification circuit connects respectively IGBT inverter circuit, the input of voltage detecting circuit, the output termination motor of IGBT inverter circuit, the input termination controller of drive circuit, the output termination IGBT inverter circuit of drive circuit, the output of driving power module connects PWM isolation and drive circuit, the output of the input termination IGBT inverter circuit of current detection circuit, the input termination motor of speed detect circuit, voltage detecting circuit, current detection circuit, speed detect circuit connects respectively controller, telecommunication circuit, display screen is connected with controller.
Controller in the present invention is selected the TMS320F2812 microcontroller of American TI Company, and this chip functions is complete, fast operation, it is a kind of high performance 32-bit number signal processor, it is powerful, and power consumption is little, except normal work, can also work in the battery saving modes such as standby mode.Inverter module in the present invention is selected the IGBT module of German Xi Menkang company, and this module saturation pressure is by low, and bus inductance is little, and switching frequency is high, simple in structure, easy for installation.
The present invention is contactless control, by controller realize locomotive forward, backward, the operating mode such as starting, traction, electric braking.Microcomputerized controller TMS320F2812A produces three-phase PWM signal by control, drives IGBT through IGBT drive plate, produces three-phase alternating voltage and drives alternating current machine, and TMS320F2812A, by Hall element, detects current of electric.Convert by current phasor, carry out dynamic flux regulator and torque current closed-loop adjustment, produce space vector of voltage pwm signal, realize motor traction, braking, thus realize the contactless control of motor.
Operation principle of the present invention is: three-phase alternating current becomes smooth direct current electricity after rectification filtering module, enter inversion module, microcontroller detects frequency conversion output current, DC bus-bar voltage and motor speed, after microcontroller is processed, export adjustable pwm signal and remove to control IGBT inversion module after drive circuit carries out power amplification, realize turning on and off of IGBT power tube, provide variable ratio frequency changer power supply to alternating current motor, realize the frequency control of alternating current motor.Electric current, voltage and motor speed testing circuit detect DC bus-bar voltage, frequency converter three-phase output current and motor speed; the signal that detection is obtained is given controller; for frequency converter vector control and corresponding protection; as there is the phenomenons such as overvoltage, under-voltage and overcurrent; controller will cut out the output of PWM module, thereby ensure the safety of frequency converter.
Claims (3)
1. a trolley locomotive frequency converter, is characterized in that: comprise rectification circuit, drive circuit, IGBT inverter circuit, voltage detecting circuit, current detection circuit, speed detect circuit, telecommunication circuit, controller, display screen, described three-phase alternating current is delivered to the input of rectification circuit, the output of rectification circuit connects respectively IGBT inverter circuit, the input of voltage detecting circuit, the output termination motor of IGBT inverter circuit, the input termination controller of drive circuit, the output termination IGBT inverter circuit of drive circuit, the output of driving power module connects PWM isolation and drive circuit, the output of the input termination IGBT inverter circuit of current detection circuit, the input termination motor of speed detect circuit, voltage detecting circuit, current detection circuit, speed detect circuit connects respectively controller, telecommunication circuit, display screen is connected with controller.
2. trolley locomotive frequency converter according to claim 1, is characterized in that: described controller adopts TMS320F2812A controller.
3. according to the trolley locomotive frequency converter described in claim 1, it is characterized in that: described current detection circuit adopts Hall element.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410121631.9A CN103856144A (en) | 2014-03-28 | 2014-03-28 | Frequency converter for overhead line electric locomotive |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410121631.9A CN103856144A (en) | 2014-03-28 | 2014-03-28 | Frequency converter for overhead line electric locomotive |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103856144A true CN103856144A (en) | 2014-06-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410121631.9A Pending CN103856144A (en) | 2014-03-28 | 2014-03-28 | Frequency converter for overhead line electric locomotive |
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| CN (1) | CN103856144A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050122752A1 (en) * | 2005-03-01 | 2005-06-09 | York International Corporation | System for precharging a DC link in a variable speed drive |
| CN101017366A (en) * | 2006-12-08 | 2007-08-15 | 清华大学 | Double generator redundancy control system |
| JP2008118830A (en) * | 2006-11-08 | 2008-05-22 | Hitachi Ltd | Motor drive circuit and motor drive method, and semiconductor integrated circuit device |
| CN102006010A (en) * | 2010-12-23 | 2011-04-06 | 湖南科技大学 | Variable frequency driving control method and device for high-power mine hoist |
| CN201860286U (en) * | 2010-08-03 | 2011-06-08 | 戴薇 | Control system for pumping unit in oil field |
| CN203911835U (en) * | 2014-03-28 | 2014-10-29 | 湘潭赫施曼电控科技有限公司 | Stringing type motor vehicle-used frequency converter |
-
2014
- 2014-03-28 CN CN201410121631.9A patent/CN103856144A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050122752A1 (en) * | 2005-03-01 | 2005-06-09 | York International Corporation | System for precharging a DC link in a variable speed drive |
| JP2008118830A (en) * | 2006-11-08 | 2008-05-22 | Hitachi Ltd | Motor drive circuit and motor drive method, and semiconductor integrated circuit device |
| CN101017366A (en) * | 2006-12-08 | 2007-08-15 | 清华大学 | Double generator redundancy control system |
| CN201860286U (en) * | 2010-08-03 | 2011-06-08 | 戴薇 | Control system for pumping unit in oil field |
| CN102006010A (en) * | 2010-12-23 | 2011-04-06 | 湖南科技大学 | Variable frequency driving control method and device for high-power mine hoist |
| CN203911835U (en) * | 2014-03-28 | 2014-10-29 | 湘潭赫施曼电控科技有限公司 | Stringing type motor vehicle-used frequency converter |
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Application publication date: 20140611 |