KR19990036469A - 3-phase variable induction motor for driving air conditioner compressor of diesel locomotive - Google Patents
3-phase variable induction motor for driving air conditioner compressor of diesel locomotive Download PDFInfo
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- KR19990036469A KR19990036469A KR1019980014037A KR19980014037A KR19990036469A KR 19990036469 A KR19990036469 A KR 19990036469A KR 1019980014037 A KR1019980014037 A KR 1019980014037A KR 19980014037 A KR19980014037 A KR 19980014037A KR 19990036469 A KR19990036469 A KR 19990036469A
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- air conditioner
- converter
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61D—BODY DETAILS OR KINDS OF RAILWAY VEHICLES
- B61D27/00—Heating, cooling, ventilating, or air-conditioning
- B61D27/0072—Means for cooling only
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
- B60H1/00—Heating, cooling or ventilating [HVAC] devices
- B60H1/00357—Air-conditioning arrangements specially adapted for particular vehicles
- B60H1/00371—Air-conditioning arrangements specially adapted for particular vehicles for vehicles carrying large numbers of passengers, e.g. buses
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
- B60H1/00—Heating, cooling or ventilating [HVAC] devices
- B60H1/32—Cooling devices
- B60H1/3204—Cooling devices using compression
- B60H1/3222—Cooling devices using compression characterised by the compressor driving arrangements, e.g. clutches, transmissions or multiple drives
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61D—BODY DETAILS OR KINDS OF RAILWAY VEHICLES
- B61D27/00—Heating, cooling, ventilating, or air-conditioning
- B61D27/0018—Air-conditioning means, i.e. combining at least two of the following ways of treating or supplying air, namely heating, cooling or ventilating
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/14—Arrangements for reducing ripples from dc input or output
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P27/00—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage
- H02P27/04—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage
- H02P27/06—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage using dc to ac converters or inverters
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P3/00—Arrangements for stopping or slowing electric motors, generators, or dynamo-electric converters
- H02P3/06—Arrangements for stopping or slowing electric motors, generators, or dynamo-electric converters for stopping or slowing an individual dynamo-electric motor or dynamo-electric converter
- H02P3/08—Arrangements for stopping or slowing electric motors, generators, or dynamo-electric converters for stopping or slowing an individual dynamo-electric motor or dynamo-electric converter for stopping or slowing a dc motor
- H02P3/12—Arrangements for stopping or slowing electric motors, generators, or dynamo-electric converters for stopping or slowing an individual dynamo-electric motor or dynamo-electric converter for stopping or slowing a dc motor by short-circuit or resistive braking
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P3/00—Arrangements for stopping or slowing electric motors, generators, or dynamo-electric converters
- H02P3/06—Arrangements for stopping or slowing electric motors, generators, or dynamo-electric converters for stopping or slowing an individual dynamo-electric motor or dynamo-electric converter
- H02P3/08—Arrangements for stopping or slowing electric motors, generators, or dynamo-electric converters for stopping or slowing an individual dynamo-electric motor or dynamo-electric converter for stopping or slowing a dc motor
- H02P3/14—Arrangements for stopping or slowing electric motors, generators, or dynamo-electric converters for stopping or slowing an individual dynamo-electric motor or dynamo-electric converter for stopping or slowing a dc motor by regenerative braking
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
- B60Y2200/00—Type of vehicle
- B60Y2200/30—Railway vehicles
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
- Control Of Ac Motors In General (AREA)
- Inverter Devices (AREA)
Abstract
본 발명은 디젤기관차의 에어콘 압축기 구동용 3상 가변유도전동기에 관한 것으로 특히, 디젤기관차의 주발전기와 전기적으로 독립되게 설치된 부수 교류발전기(1)에서 출력되는 3상 교류전압을 각각 직류전압으로 반파정류시켜 주는 콘버터(2)와; 상기 콘버터(2)의 출력전압에 포함된 리플전압 및 인버터(4)에서 발생되는 리플전압(전류)을 제거해 주는 평활회로부(3)와; 수개의 스위칭 소자를 정해진 시각에 온/오프시켜 주는 방식을 통해 상기 평활회로부(3)를 통해 출력되는 직류전압을 소망하는 주파수의 교류전압으로 변환시켜 3상 유도전동기(6)의 각 단자(U,V,W)에 인가시켜 주는 인버터(4)와; 상기 3상 유도전동기(6)를 급제동시키고자할시 가역 콘버터로 전원을 회생시키거나 브레이크 회로를 통해 회생전력을 소비시켜 직류전압의 상승을 방지하는 브레이크회로부(5)로 구성하여 디젤기관차에 설치된 에어콘의 압축기 구동용 3상 가변유도전동기를 가변전압 가변주파수(V.V.V.F) 형태로 구동시킬 수 있도록 하므로써, 엔진 회전수에 따라 3Φ AC 45-215V, 30-120Hz로 변화되는 교류전압을 동시에 수용할 수 있어 제품의 신뢰도를 향상시킬 수 있음은 물론 설치상, 유지보수상의 문제 및 생산원가 상승요인등을 완벽히 해결할 수 있는 것이다.The present invention relates to a three-phase variable induction motor for driving an air conditioner compressor of a diesel locomotive. Particularly, the three-phase alternating voltage output from the secondary alternator 1, which is installed independently of the main generator of the diesel locomotive, is half-waved by a DC voltage. A converter 2 for rectifying; A smoothing circuit unit 3 for removing the ripple voltage included in the output voltage of the converter 2 and the ripple voltage (current) generated by the inverter 4; Each terminal (U) of the three-phase induction motor (6) by converting the DC voltage output through the smoothing circuit section 3 into an AC voltage of a desired frequency by turning on / off several switching elements at a predetermined time. An inverter 4 to be applied to V, W; When braking the three-phase induction motor (6) is installed in the diesel locomotive consisting of a brake circuit (5) to prevent the rise of the DC voltage by regenerating the power to the reversible converter or consume the regenerative power through the brake circuit By allowing the three-phase variable induction motor of the air conditioner to be driven in the form of a variable voltage variable frequency (VVVF), it can simultaneously accommodate alternating voltages varying from 3Φ AC 45-215V, 30-120Hz depending on the engine speed. As well as improving the reliability of the product, it is possible to completely solve the installation, maintenance problems and production cost increase factors.
Description
본 발명은 디젤기관차의 에어콘 압축기 구동용 3상 가변유도전동기에 관한 것으로, 더욱 상세히는 엔진의 회전수에 따라 3Φ AC 45-215V, 30-120Hz의 교류전압을 발생시키는 디젤기관차의 에어콘 압축기를 가변전압 가변주파수(V.V.V.F) 형태로 구동시킬 수 있도록 발명된 것이다.The present invention relates to a three-phase variable induction motor for driving an air conditioner compressor of a diesel locomotive. More specifically, the air conditioner compressor of a diesel locomotive that generates an AC voltage of 3Φ AC 45-215V and 30-120 Hz according to the engine speed is variable. It is invented to be able to drive in the form of voltage variable frequency (VVVF).
일반 철도차량의 에어콘 공급전원은 AC 110V, 220V, 380V 및 440V이므로 에어콘을 채택함에 있어 아무런 문제가 없으나, 디젤기관차의 경우 엔진의 회전수에 따라 3Φ AC 45-215V, 30-120Hz 까지 폭넓은 가변범위를 가지고 있으므로 일반적인 3상 가변전압 가변주파수 형태의 발전기로는 에어콘 부품 채택에 전기적인 장애가 있다.The air conditioner power supply for general railway vehicles is AC 110V, 220V, 380V and 440V, so there is no problem in adopting air conditioner, but for diesel locomotives, it varies widely to 3Φ AC 45-215V, 30-120Hz depending on the engine speed. As a general three-phase variable voltage variable frequency type generator has a range, there is an electrical obstacle to the adoption of air conditioning components.
따라서, 종래의 디젤기관차에서는 분권발전기로써 플렉시블 커플링과 연장축에 의하여 기관에 직결되어 회전하고 계자전류는 전압조정기에 의하여 회전속도에 따라 알맞게 공급되어 항상 조정된 범위내에서 일정전압을 발전하며 회전속도는 기관회전수의 약 3.037배이나 회전속도 전반에 걸쳐 걸쳐 거의 일정한 전압을 발전하는 직류 보조발전기를 이용하여 DC 74V±2V를 발전해낸 후 이를 직류전압을 3Φ AC 55V 60Hz로 인버팅하여 에어콘의 압축기와 증발기 및 응축기용 모터를 구동시키는 구성으로 되어 있었다.Therefore, in the conventional diesel locomotive, the decentralized generator is directly connected to the engine by a flexible coupling and an extended shaft, and the field current is appropriately supplied according to the rotational speed by a voltage regulator, and the power is always generated while generating a constant voltage within the adjusted range. The speed is about 3.037 times of engine speed, but DC 74V ± 2V is generated by using DC auxiliary generator which generates almost constant voltage over the entire rotation speed, and then inverts DC voltage to 3Φ AC 55V 60Hz to It consisted of driving the compressor, the evaporator and the motor for the condenser.
즉, 디젤기관차은 엔진의 회전수에 따라 3Φ AC 45-215V, 30-120Hz의 가변교류전압 및 가변주파수가 발생되므로 이렇게 변화되는 교류전압을 이용하여 에어콘의 압축기와 증발기 및 응축기용 모터를 구동시킬 경우 원하는 구동력을 얻을 수 없으므로 엔진의 회전수와 무관하게 항상 일정한 직류전압을 발생시키는 직류 보조발전기를 별도로 장착하여 이 발전기에서 발전되는 직류전압을 다시 교류전압으로 변환시켜 에어콘의 압축기와 증발기 및 응축기용 모터등에 공급시켜 주는 구성으로 되어 있었다.That is, the diesel locomotive generates a variable AC voltage and a variable frequency of 3Φ AC 45-215V, 30-120Hz according to the engine speed, so when using the alternating voltage to drive the compressor, evaporator and condenser motor of the air conditioner. Since a desired driving force cannot be obtained, a separate DC auxiliary generator that always generates a constant DC voltage irrespective of the engine's rotational speed is installed separately, and the DC voltage generated in this generator is converted into AC voltage again, so that the compressor, evaporator, and condenser motor of the air conditioner It was configured to be supplied to the back.
여기서, 인버터는 사용부하 또는 속도제어방식에 따라 선택하여 사용할 수 있는데, 즉 속도를 제어할 경우 벡터제어, 전류제어방식등을 사용하고 일정 토오크 부하용인지 저감토오크 부하인지 구분하여 사용목적을 달성할 수 있다.In this case, the inverter can be selected and used according to the used load or speed control method. That is, when controlling the speed, it is possible to use the vector control, the current control method, etc. Can be.
그러나, 인버터는 모두가 전압과 주파수가 거의 동일 비율로 증감하여 전압/주파수는 일정하게 변화하여 모터의 회전수를 변화시킨다.However, all of the inverters increase and decrease at almost the same ratio of voltage and frequency so that the voltage / frequency is constantly changed to change the rotational speed of the motor.
또, 유도전동기의 동기속도(N=(120 X F) ÷ P)는 주파수(F)를 변화시키면 모터의 속도는 당연히 변하게 되는데, 예를들어 주파수 변화의 영역이 30Hz에서 120Hz이고 모터가 4폴(Pole)인 경우 모터의 회전수 가변영역은 90RPM에서 360RPM이 된다.Also, if the induction motor's synchronous speed (N = (120 XF) ÷ P) changes the frequency (F), the speed of the motor will naturally change. For example, the frequency range is 30Hz to 120Hz and the motor has 4 poles ( Pole), the variable speed range of the motor is from 90 RPM to 360 RPM.
상기에서 사용된 인버터가 일반적인 경우 저주파수의 영역(약 60Hz 이하)에서는 전압/주파수가 일정하지 않을 수 있으므로 180 RPM 이하시는 정밀회전수 선택이 곤란하고, 또 인버터의 출력파형이 일반 상용전원과 같이 싸이파가 아니고 구형파이므로 모터에서 열이 많이 발생되는 문제점도 있다.In the case of the inverter used above, the voltage / frequency may not be constant in the low frequency range (about 60 Hz or less). Therefore, it is difficult to select the precise rotation speed below 180 RPM, and the output waveform of the inverter is the same as that of general commercial power. Since it is not a sine wave but a square wave, there is a problem that a lot of heat is generated in the motor.
뿐만 아니라, 상기와 같은 직류 보조발전기에서 발생되는 직류전압을 이용하여 에어콘의 각부 모터를 구동하던 중 소정의 부품에서 문제가 발생되었을시 각 부품의 제조업체로 부터 특이사항(예를들어 AC 55V)에 대한 부품조달이 어렵고, 또 74V±2V의 직류전압을 3Φ 60Hz 55V의 교류전압으로 변환시켜 주는 인버터은 주문 제작해야하므로 제품의 생산원가가 높게 책정됨은 물론 그 크기 매우 커서 취부공간의 확보문제가 대두되고 있는 실정이다.In addition, if a problem occurs in a certain part while driving the motor of each part of the air conditioner by using the DC voltage generated by the DC auxiliary generator as described above, the manufacturer may not meet the specifics (eg, AC 55V) from the manufacturer of each part. It is difficult to procure parts, and the inverter that converts DC voltage of 74V ± 2V into AC voltage of 3Φ 60Hz 55V has to be made to order, so the production cost of the product is set high and its size is very large, which secures mounting space. There is a situation.
본 발명은 상기한 제반문제를 해결하기 위하여 안출한 것으로, 디젤기관차에 설치된 에어콘의 압축기 구동용 3상 가변유도전동기를 가변전압 가변주파수(V.V.V.F) 형태로 구동시킬 수 있도록 하여 디젤기관차의 엔진 회전수에 따라 3Φ AC 45-215V, 30-120Hz의 교류전압을 동시에 수용할 수 있는 디젤기관차의 에어콘 압축기 구동용 3상 가변유도전동기를 제공하는데 그 목적이 있다.The present invention has been made to solve the above problems, the three-phase variable induction motor for driving the compressor of the air conditioner installed in the diesel locomotive can be driven in the form of variable voltage variable frequency (VVVF) engine speed of the diesel locomotive The purpose of the present invention is to provide a three-phase variable induction motor for driving an air conditioner compressor of a diesel locomotive capable of accommodating 3Φ AC 45-215V and 30-120Hz AC voltage simultaneously.
이러한 본 발명의 목적은, 부수 교류발전기에서 출력되는 3상 교류전압을 각각 직류전압으로 정류시켜 주는 콘버터와; 상기 콘버터의 출력전압에 포함된 리플전압 및 인버터에서 발생되는 리플전압(전류)을 제거해 주는 평활회로부와; 상기 평활회로부를 통해 출력되는 직류전압을 소망하는 주파수의 교류전압으로 변환시켜 에어콘 압축기용 3상 유도전동기의 각 단자(U,V,W)에 인가시켜 주는 인버터와; 상기 3상 유도전동기를 급제동시키고자할시 가역 콘버터로 전원을 회생시키거나 브레이크 회로를 통해 회생전력을 소비시켜 직류전압의 상승을 방지하는 브레이크회로부로 구성하므로써 달성할 수 있다.The object of the present invention, the converter for rectifying the three-phase AC voltage output from the secondary AC generator to a DC voltage, respectively; A smoothing circuit unit for removing the ripple voltage included in the output voltage of the converter and the ripple voltage (current) generated by the inverter; An inverter for converting the DC voltage output through the smoothing circuit unit into an AC voltage of a desired frequency and applying it to each terminal (U, V, W) of the three-phase induction motor for an air conditioner; When braking the three-phase induction motor can be achieved by configuring the brake circuit portion to prevent the rise of the DC voltage by regenerating the power to the reversible converter or consume the regenerative power through the brake circuit.
따라서, 디젤기관차의 부수 교류발전기에서 발생되는 3Φ AC 45-215V의 가변교류전압과 30-120Hz의 가변주파수를 동시에 수용하여 에어콘 압축기의 3상 교류전동기를 구동시킬 수 있어 제품의 생산원가를 절감시킬 수 있음은 물론 보수작업이 유리하고, 또 설치공간을 쉽게 확보할 수 있는 것이다.Therefore, by accommodating 3Φ AC 45-215V variable alternating voltage and 30-120Hz variable frequency generated from secondary AC generator of diesel locomotive, it can drive three-phase AC motor of air conditioner compressor to reduce production cost. Of course, the repair work is advantageous, and the installation space can be easily secured.
이하 본 발명의 바람직한 실시예를 첨부된 도면에 의해 상세히 설명하기로 한다.Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.
도 1은 본 발명의 구성도.1 is a block diagram of the present invention.
도면중 주요 부분에 대한 부호의 설명Explanation of symbols for main parts in the drawings
1 : 부수 교류발전기 2 : 콘버터1: AC Alternator 2: Converter
3 : 평활회로부 4 : 인버터3: smoothing circuit part 4: inverter
5 : 브레이크회로부 6 : 3상 유도전동기5: brake circuit 6: 3 phase induction motor
도 1은 본 발명의 구성도를 나타낸 것으로 이에 따르면, 각각 두개의 다이오드(D1-D6)들을 각상(R,S,T)에 병렬 연결시켜 부수 교류발전기(1)에서 출력되는 3상 교류전압을 각각 직류전압으로 반파정류시켜 주는 콘버터(2)와;1 shows a schematic diagram of the present invention, in which two diodes D1-D6 are connected to each of the phases R, S, and T in parallel to output a three-phase AC voltage output from the secondary AC generator 1. A converter 2 for half-wave rectifying at a DC voltage, respectively;
코일(L)과 콘덴서(C)를 상기 콘버터(2)의 출력부에 병렬 연결시킨 구성으로 되어 상기 콘버터(2)의 출력전압에 포함된 리플전압 및 인버터(4)에서 발생되는 리플전압(전류)을 제거해 주는 평활회로부(3)와;The coil L and the condenser C are connected in parallel to the output of the converter 2 so that the ripple voltage included in the output voltage of the converter 2 and the ripple voltage generated by the inverter 4 (current A smoothing circuit unit 3 for removing);
6개의 스위칭 소자를 정해진 시각에 온/오프시켜 주는 방식을 통해 상기 평활회로부(3)를 통해 출력되는 직류전압을 소망하는 주파수의 교류전압으로 변환시켜 에어콘 압축기용 3상 유도전동기(6)의 각 단자(U,V,W)에 인가시켜 주는 인버터(4)와;Each of the three-phase induction motors 6 for an air conditioner compressor is converted into an AC voltage having a desired frequency by converting the DC voltage outputted through the smoothing circuit section 3 by turning on / off six switching elements at a predetermined time. An inverter 4 applied to the terminals U, V, and W;
상기 평활회로부(3)의 출력단과 인버터(4)의 입력단 사이에 설치되어 상기 3상 유도전동기(6)를 급제동시키고자할시 가역 콘버터로 전원을 회생시키거나 브레이크 회로를 통해 회생전력을 소비시켜 직류전압의 상승을 방지하는 브레이크회로부(5)로 구성된 것을 특징으로 한다.It is installed between the output terminal of the smoothing circuit unit 3 and the input terminal of the inverter 4 to rapidly brake the three-phase induction motor 6 to regenerate power with a reversible converter or to consume regenerative power through a brake circuit. It is characterized by consisting of a brake circuit portion 5 for preventing the rise of the DC voltage.
이와같이 구성된 본 발명 회로의 작용효과를 설명하면 다음과 같다.Referring to the operation and effect of the circuit of the present invention configured as described above are as follows.
먼저, 디젤기관차에서 기관냉각 선풍 전동기, 관성 여과기 송풍전동기 및 견인 전동기 송풍전동기 등 보조장치를 위한 동력을 제공하는데 사용되는 부수 교류발전기(1)는 디젤기관차의 주발전기와 기계적으로는 연결되도록 설치하나, 전기적으로 독립되도록 설치한다.First, the secondary AC generator (1), which is used to provide power for auxiliary devices such as an engine cooling fan motor, an inertial filter blow motor, and a traction motor blow motor in a diesel locomotive, is installed to be mechanically connected to the main generator of the diesel locomotive. Install in electrical independence.
이와같은 부수 교류발전기(1)는 회전계자형으로 고정자는 주발전기 프레임에 볼트로 고정되고 회전자 조립체는 주발전기 회전자와 함께 디젤기관차의 크랭크축에 티스크형 플렉시블 커플링에 의해 직결되며, 엔진의 회전수에 따라 서로 다른 발전전압 및 주파수를 나타내게 되는데, 예를들어 기관차의 속도가 0인 아이들 상태에서는 32Hz의 AC 45V를 발전하고 60KM/H에서는 60Hz의 AC 100V를 발전하며, 140KM/H에서는 120Hz의 AC 215V를 발전하게 된다.The secondary alternator 1 is a rotating field magnet, the stator is bolted to the main generator frame, and the rotor assembly is directly connected to the crankshaft of the diesel locomotive by a teasque flexible coupling together with the main generator rotor. According to the number of revolutions, different generation voltages and frequencies are displayed.For example, when the locomotive speed is 0, the power generation is 32V AC 45V, 60KM 60H AC 100V, 140KM / H 120Hz Will develop AC 215V.
상기 부수 교류발전기(1)에서 출력되는 가변주파수의 가변 교류전압은 각 상에 대응하여 각각 두개의 다이오드(D1-D6)들로 구성된 콘버터(2)를 통해 각각 직류전압으로 반파정류된 후 평활회로부(3)로 인가되는데, 이때 상기 콘버터(2)는 사이리스터 콘버터 2조를 사용하여 가역 콘버터로 구성하여 주므로써 전력의 방향이 가역되어 회생운전이 가능하게 된다.The variable AC voltage of the variable frequency output from the secondary AC generator 1 is half-wave rectified by DC voltage through a converter 2 composed of two diodes D1-D6, respectively, corresponding to each phase, and then smoothing circuit part. In this case, the converter 2 is configured as a reversible converter using two sets of thyristor converters so that the direction of power is reversible to enable regenerative operation.
한편, 상기 콘버터(2)를 통해 반파 정류된 직류전압에는 6배 주파수의 리플전압이 포함되어 있고, 또 에어콘 압축기용 3상 유도전동기(6)에 교류전압을 인가시켜 주는 인버터(4)에서도 리플전류가 발생되어 직류전압이 변동하게 되므로, 본 발명에서는 상기 콘버터(2)와 인버터(4) 사이에 코일(L)과 콘덴서(C)를 병렬 연결시킨 구성의 평활회로부(3)를 설치하여 상기 콘버터(2)의 출력전압에 포함된 리플전압 및 인버터(4)에서 발생되는 리플전압(전류)을 제거한 후 순수 직류전압만 인버터(4) 및 브레이크회로부(5)로 인가시킬 수 있도록 하였다.On the other hand, the DC voltage half-wave rectified through the converter 2 includes a ripple voltage of 6 times the frequency, and also in the inverter 4 which applies an AC voltage to the three-phase induction motor 6 for an air conditioner compressor. Since a current is generated and a DC voltage is changed, in the present invention, a smoothing circuit unit 3 having a structure in which a coil L and a capacitor C are connected in parallel between the converter 2 and the inverter 4 is provided. After removing the ripple voltage included in the output voltage of the converter 2 and the ripple voltage (current) generated by the inverter 4, only the pure DC voltage can be applied to the inverter 4 and the brake circuit unit 5.
이와같은 평활회로부(3)는 장치의 용량이 작을 경우 전원이나 주회로 구성요소에 여유를 주면 코일을 생략하여 평활회로 자체를 간략화할 수도 있다.Such a smoothing circuit part 3 may simplify the smoothing circuit itself by omitting the coils when the capacity of the device is small to allow power or main circuit components.
또한, 상기 평활회로부(3)의 출력단과 3상 유도전동기(6)의 각 전원단자(U,V,W) 사이에 설치되어 상기 콘버터(2)와 반대로 평활회로부(3)를 통해 출력되는 직류전압을 소망하는 주파수의 교류전압으로 변환시켜 주는 인버터(4)는 6개의 스위칭 소자로 구성하되 각각의 스위칭 소자를 정해진 시각에 맞추어 온/오프시켜 주므로써, 디젤기관차의 엔진회전수와 무관하게 에어콘 압축기용 3상 유도전동기에서 원하는 주파수의 교류전압을 얻을 수 있는 것이다.In addition, a direct current installed between the output terminal of the smoothing circuit unit 3 and the power terminals U, V, and W of the three-phase induction motor 6 is output through the smoothing circuit unit 3 as opposed to the converter 2. The inverter 4, which converts the voltage into an alternating voltage of a desired frequency, is composed of six switching elements, and each switching element is turned on / off at a predetermined time, thereby irradiating the air conditioner regardless of the engine speed of the diesel locomotive. The three-phase induction motor for the compressor can obtain the AC voltage of the desired frequency.
한편, 상기한 에어콘 압축기용 3상 유도전동기(6)를 회생제동영역(즉, 미끄럼이 마이너스인 상태)에서 사용하면 회생된 에너지가 평활회로부(3)의 콘덴서(C)에 축적되어 직류전압이 상승하게 되는데, 일반적으로 전동기를 포함한 기계의 관성에 의한 축적 에너지는 콘덴서에 축적되는 에너지에 비해 크다.On the other hand, when the three-phase induction motor 6 for an air conditioner compressor is used in the regenerative braking area (that is, in a state in which the sliding is negative), the regenerated energy is accumulated in the condenser C of the smoothing circuit part 3, so that the DC voltage is reduced. In general, the energy stored by the inertia of a machine including an electric motor is larger than that stored in a capacitor.
따라서, 본 발명에서는 상기 평활회로부(3)의 출력단과 인버터(4)의 입력단 사이에 브레이크회로부(5)를 설치하여 상기 에어콘 압축기용 3상 유도전동기(6)를 급제동시키고자할 경우 가역 콘버터로 전원을 회생시키거나, 브레이크 회로(스위치와 저항기)를 통해 회생전력을 소비시켜 3상 유도전동기(6)의 제동에 영향을 주는 직류전압의 상승을 방지하였다.Therefore, in the present invention, when the brake circuit unit 5 is installed between the output terminal of the smoothing circuit unit 3 and the input terminal of the inverter 4 to rapidly brake the three-phase induction motor 6 for the air conditioner compressor, the reversible converter is used. Regenerative power was consumed through the power supply or brake circuits (switches and resistors) to prevent the rise of the DC voltage affecting the braking of the three-phase induction motor (6).
이상에서 설명한 바와 같이 본 발명에 의하면, 디젤기관차에 설치된 에어콘의 압축기 구동용 3상 가변유도전동기를 가변전압 가변주파수(V.V.V.F) 형태로 구동시킬 수 있어 디젤기관차의 엔진 회전수에 따라 3Φ AC 45-215V, 30-120Hz로 변화되는 교류전압을 동시에 수용할 수 있어 제품의 신뢰도를 향상시킬 수 있음은 물론 설치상의 문제와 유지보수의 문제 및 생산원가 상승요인등을 완벽히 해결할 수 있는 것이다.As described above, according to the present invention, the three-phase variable induction motor for driving the compressor of the air conditioner installed in the diesel locomotive can be driven in the form of variable voltage variable frequency (VVVF). By accommodating alternating voltage of 215V, 30-120Hz at the same time, it can improve the reliability of the product, and it can completely solve the installation problem, maintenance problem and production cost increase factor.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1019980014037A KR100259473B1 (en) | 1998-04-20 | 1998-04-20 | Three-phase varible induction motor for driving an air conditioner compressor of diesel engine |
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| KR1019980014037A KR100259473B1 (en) | 1998-04-20 | 1998-04-20 | Three-phase varible induction motor for driving an air conditioner compressor of diesel engine |
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| KR100259473B1 KR100259473B1 (en) | 2000-07-01 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| KR100343194B1 (en) * | 2000-04-04 | 2002-07-11 | 권영한 | Apparatus for feeding an cooling power of main convertor or invertor in traction applications |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| KR100343194B1 (en) * | 2000-04-04 | 2002-07-11 | 권영한 | Apparatus for feeding an cooling power of main convertor or invertor in traction applications |
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