KR20010017761A - Apparatus and method for controlling over current of single phase switched reluctance motor - Google Patents

Apparatus and method for controlling over current of single phase switched reluctance motor Download PDF

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Publication number
KR20010017761A
KR20010017761A KR1019990033429A KR19990033429A KR20010017761A KR 20010017761 A KR20010017761 A KR 20010017761A KR 1019990033429 A KR1019990033429 A KR 1019990033429A KR 19990033429 A KR19990033429 A KR 19990033429A KR 20010017761 A KR20010017761 A KR 20010017761A
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South Korea
Prior art keywords
reluctance motor
switched reluctance
driving
phase
phase switched
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KR1019990033429A
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Korean (ko)
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김상두
문창수
백승면
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구자홍
엘지전자 주식회사
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Priority to KR1019990033429A priority Critical patent/KR20010017761A/en
Publication of KR20010017761A publication Critical patent/KR20010017761A/en

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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
    • H02H7/08—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors
    • H02H7/0805—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors for synchronous motors
    • 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
    • H02P25/00—Arrangements or methods for the control of AC motors characterised by the kind of AC motor or by structural details
    • H02P25/02—Arrangements or methods for the control of AC motors characterised by the kind of AC motor or by structural details characterised by the kind of motor
    • H02P25/08—Reluctance motors

Abstract

PURPOSE: A device and a method for controlling the overcurrent of a single phase switched reluctance motor are provided to prevent the overcurrent by driving the single phase switched reluctance motor according to a pulse width table which can accomplish the maximum torque. CONSTITUTION: A sensor(20) detects the rotational speed of a single phase switched reluctance motor(10). A driving section(50) supplies the DC power source according to a predetermined driving pulse, and drives the single phase switched reluctance motor(10). A controlling section(40) calculates the rotational speed of the single phase switched reluctance motor(10) according to the output of the sensor(20). The controlling section(40) controls the driving section(50) so that the driving pulse having the width corresponding to the rotational speed in the stored rotational speed driving pulse width table.

Description

단상 스위치드 릴럭턴스 모터의 과전류 제어장치 및 방법{APPARATUS AND METHOD FOR CONTROLLING OVER CURRENT OF SINGLE PHASE SWITCHED RELUCTANCE MOTOR}Overcurrent control device and method of single phase switched reluctance motor {APPARATUS AND METHOD FOR CONTROLLING OVER CURRENT OF SINGLE PHASE SWITCHED RELUCTANCE MOTOR}

본 발명은 모터에 관한 것으로서, 특히 단상 스위치드 릴럭턴스 모터(Switched Reluctance Motor: SRM)의 과전류 제어장치 및 방법에 관한 것이다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a motor, and more particularly, to an overcurrent control apparatus and method for a single phase switched reluctance motor (SRM).

일반적으로 SRM은 단상, 2상, 3상 등이 있는데, 단상 SRM(10)은 2상 또는 3상 SRM에 비해 구조 및 제어관련 구성이 간단하므로 관련부품수가 적어 제조 비용이 저렴한 장점이 있다.In general, SRM has a single-phase, two-phase, three-phase, and the like, the single-phase SRM (10) has the advantage that the manufacturing cost is low because the number of related parts is simpler than the two-phase or three-phase SRM configuration.

그리고 그 개략적인 구성을 살펴보면, 도 1에 도시된 바와 같이, 인가된 전원에 따라 자력을 발생시키는 스테이터(11), 스테이터(11)에 발생된 자력에 의해 회전 운동하는 로터(12), 로터(12)를 항상 동일한 위치 즉, 구동 토크 발생이 가능한 위치에 정지시키기 위한 파킹 마그넷(Parking Magnet)(13)으로 구성되고, 이를 구동하기 위해 스위칭 소자인 IGBT(Insulating Gate Bipolar Transistor) 등으로 이루어진 단상 SRM(10) 구동회로가 연계 구성된다.Referring to the schematic configuration, as shown in FIG. 1, a stator 11 generating magnetic force in accordance with an applied power source, a rotor 12 rotating by a magnetic force generated in the stator 11, and a rotor ( 12) is composed of a parking magnet 13 for always stopping at the same position, that is, a position where drive torque can be generated, and a single-phase SRM made of an IGBT (Insulating Gate Bipolar Transistor) or the like for driving the same. (10) The driving circuit is linked.

이와 같이 구성된 단상 SRM(10)은 도 2에 도시된 바와 같이, 정상적인 운전의 경우 초기 기동시 전류가 상승하다가 시간이 경과하면 완만한 경사를 이루는 'A'와 같은 전류 변화 곡선을 나타나는데, SRM(10) 구속 등 여러 가지 원인으로 인한 비정상적인 운전의 경우 'B'와 같이 전류 변화 곡선이 급격히 상승하여 단상 SRM(10) 및 구동소자의 파괴 등을 초래할 수 있는 과전류 상태를 나타낸다.As shown in FIG. 2, the single-phase SRM 10 configured as described above shows a current change curve such as 'A' that gradually increases when the current increases during initial start-up in the case of normal operation. 10) In case of abnormal operation due to various reasons such as restraint, the current change curve rapidly increases as shown in 'B', indicating an overcurrent state that may cause damage to the single-phase SRM 10 and the driving device.

따라서 단상 SRM(10)을 정상적으로 구동시키기 위해서는 과전류를 제한할 수 있는 구성이 필연적이다.Therefore, in order to drive the single-phase SRM 10 normally, a configuration capable of limiting overcurrent is inevitable.

그러나 현재 단상 SRM의 경우 속도제어를 위한 구성은 물론이고 과전류를 제한하기 위한 구성도 상용화되지 못한 상태이다.However, in the case of single-phase SRM, not only the configuration for speed control but also the configuration for limiting overcurrent is not commercialized.

종래의 기술에 따른 단상 SRM은 과전류를 제한하기 위한 제어구성이 상용화되어 있지 못하므로 이를 실제 제품에 적용시 과전류로 인한 모터 및 구동 관련부품의 손상을 초래할 수 있는 문제점이 있다.The single-phase SRM according to the prior art has a problem that can cause damage to the motor and drive-related parts due to the overcurrent when the control configuration for limiting the overcurrent is not commercially available.

따라서 본 발명은 상기한 종래의 문제점을 해결하기 위하여 안출한 것으로서, 단상 SRM의 과전류를 방지할 수 있도록 한 단상 SRM 과전류 제어장치 및 방법을 제공함에 그 목적이 있다.Accordingly, an object of the present invention is to provide a single-phase SRM overcurrent control apparatus and method capable of preventing overcurrent of a single-phase SRM.

도 1은 일반적인 단상 SRM의 구성을 나타낸 도면1 is a view showing the configuration of a typical single-phase SRM

도 2는 단상 SRM 구동시 시간에 따른 전류변화를 나타낸 그래프2 is a graph showing a change in current with time when driving a single-phase SRM

도 3은 본 발명에 따른 SRM 과전류 제어장치의 구성을 나타낸 블록도Figure 3 is a block diagram showing the configuration of the SRM overcurrent control device according to the present invention

도 4는 도 3의 각부 출력파형을 나타낸 타이밍도4 is a timing diagram illustrating output waveforms of each part of FIG. 3.

도 5는 회전수에 따른 구동 펄스의 폭 변화를 나타낸 그래프5 is a graph showing a change in the width of the driving pulse according to the number of revolutions

도 6은 본 발명에 따른 SRM 과전류 제어방법을 나타낸 플로우챠트6 is a flowchart illustrating a method of controlling SRM overcurrent according to the present invention.

도면의 주요부분에 대한 부호의 설명Explanation of symbols for main parts of the drawings

10: 단상 SRM 20: 센서10: single-phase SRM 20: sensor

30: AC/DC 변환기 40: 제어부30: AC / DC converter 40: control part

50: 구동부50: drive unit

본 발명에 따른 단상 SRM의 과전류 제어장치는 단상 스위치드 릴럭턴스 모터와, 단상 스위치드 릴럭턴스 모터의 회전수를 검출하기 위한 센서와, 직류전원을 소정 구동 펄스에 따라 공급하여 단상 스위치드 릴럭턴스 모터를 구동하는 구동부와, 센서의 출력에 따라 단상 스위치드 릴럭턴스 모터의 회전수를 산출하고 기저장된 회전수별 구동 펄스 폭 테이블에서 그 회전수에 해당하는 폭을 갖는 구동 펄스가 출력되도록 구동부를 제어하는 제어부를 포함하여 구성됨을 특징으로 한다.The over-current control device of the single-phase SRM according to the present invention supplies a single-phase switched reluctance motor, a sensor for detecting the rotational speed of the single-phase switched reluctance motor, and a DC power supply according to a predetermined driving pulse to drive the single-phase switched reluctance motor. And a control unit configured to calculate the rotational speed of the single-phase switched reluctance motor according to the output of the sensor and to control the driving unit to output a driving pulse having a width corresponding to the rotational speed in the previously stored driving pulse width table. Characterized in that configured.

본 발명에 따른 단상 SRM의 과전류 제어방법은 운전명령에 따라 소정의 구동 펄스를 인가하여 단상 스위치드 릴럭턴스 모터를 구동하는 단계와, 단상 릴럭턴스 모터의 회전수를 검출하여 해당 회전수에 따른 최대 펄스 폭 이하로 구동 펄스의 폭을 조정하는 단계를 포함하여 이루어짐을 특징으로 한다.In the overcurrent control method of the single-phase SRM according to the present invention, a predetermined driving pulse is applied to drive a single-phase switched reluctance motor according to an operation command, and the maximum pulse according to the corresponding rotation speed is detected by detecting the rotational speed of the single-phase reluctance motor. And adjusting the width of the drive pulse to less than or equal to the width.

이하, 첨부된 도면을 참조하여 본 발명에 따른 SRM 과전류 제어장치 및 방법의 바람직한 일실시예를 설명하면 다음과 같다.Hereinafter, a preferred embodiment of the SRM overcurrent control apparatus and method according to the present invention with reference to the accompanying drawings.

도 3은 본 발명에 따른 SRM 과전류 제어장치의 구성을 나타낸 블록도, 도 4는 도 3의 각부 출력파형을 나타낸 타이밍도, 도 5는 회전수에 따른 구동 펄스의 폭 변화를 나타낸 그래프이고, 도 6은 본 발명에 따른 SRM 과전류 제어방법을 나타낸 플로우챠트이다.Figure 3 is a block diagram showing the configuration of the SRM overcurrent control device according to the present invention, Figure 4 is a timing diagram showing the output waveform of each part of Figure 3, Figure 5 is a graph showing the width change of the driving pulse according to the rotational speed, 6 is a flowchart showing a SRM overcurrent control method according to the present invention.

본 발명에 따른 단상 SRM 제어장치는 도 3에 도시된 바와 같이, 단상 SRM(10), 단상 SRM(10)의 회전수를 검출하기 위한 센서(20), 상용 교류전원을 상기 단상 SRM(10)을 구동하기 위한 직류 전원으로 변환하는 AC/DC 변환기(30), 상기 AC/DC 변환기(30)에서 출력된 직류전원을 소정 구동 펄스에 따라 공급하여 단상 SRM(10)을 구동하는 구동부(50), 상기 센서(20)의 출력에 따라 단상 SRM(10)의 회전수를 산출하고 해당 회전수에 따라 구동부(50)의 구동 펄스 폭을 조정하는 제어부(40)를 포함하여 구성된다.As shown in FIG. 3, the single-phase SRM control apparatus according to the present invention includes a single-phase SRM 10, a sensor 20 for detecting the rotational speed of the single-phase SRM 10, and a commercial AC power source. AC / DC converter 30 for converting to DC power for driving the drive unit 50 for supplying the DC power output from the AC / DC converter 30 in accordance with a predetermined drive pulse to drive the single-phase SRM (10) In addition, the control unit 40 is configured to calculate the rotation speed of the single-phase SRM 10 according to the output of the sensor 20 and adjust the driving pulse width of the driving unit 50 according to the rotation speed.

이와 같이 구성된 본 발명은 도 4와 같이, 센서(20)가 로터 위치를 검출하는 시점에서 단상 SRM(10)을 구동하기 위하여 출력된 구동 펄스의 폭 'a'를 회전수에 따라 조정하여 과전류 제어를 수행한다.In the present invention configured as described above, as shown in FIG. 4, the overcurrent control is performed by adjusting the width 'a' of the output pulse in order to drive the single-phase SRM 10 at the time when the sensor 20 detects the rotor position according to the rotation speed. Perform

즉, 도 5와 같이, 회전수가 증가함에 따라 최대 폭을 넘지 않는 범위내에서 구동 펄스의 폭을 증가시켜 단상 SRM(10)이 최대 토크를 낼 수 있도록 하는 것이다.That is, as shown in FIG. 5, the single-phase SRM 10 can produce the maximum torque by increasing the width of the driving pulse within a range not exceeding the maximum width as the rotation speed increases.

이와 같이 구성된 단상 SRM 과전류 제어방법을 도 6을 참조하여 설명하면 다음과 같다.The single-phase SRM overcurrent control method configured as described above will be described with reference to FIG. 6.

먼저, 본 발명은 단상 SRM의 인덕턴스 특성을 고려하고 회전수에 따라 구동 펄스의 폭을 변화시킴에 따른 전류값 및 토크(Touqe)를 측정한 시뮬레이션 결과에 따라 과전류를 방지하고 구동 토크를 최대로 할 수 있는 회전수별 펄스 폭 테이블을 작성하여 제어부(40)에 저장한다.First, the present invention considers the inductance characteristics of the single-phase SRM and prevents overcurrent and maximizes the driving torque according to simulation results of measuring the current value and the torque (Touqe) as the width of the driving pulse is changed according to the rotation speed. A pulse width table for each rotational speed may be created and stored in the control unit 40.

이어서 제어부(40)는 사용자가 운전명령을 입력하는지 판단하여(S11), 운전명령을 입력하면 구동부(50)에 구동신호를 출력하여 소정의 구동 펄스를 출력하도록 하고 그에 따라 인가된 전원에 의해 단상 SRM(10)을 기동시킨다(S12).Subsequently, the control unit 40 determines whether the user inputs a driving command (S11), and when the driving command is input, the control unit 40 outputs a driving signal to the driving unit 50 to output a predetermined driving pulse, and accordingly, the single phase is applied by the applied power. The SRM 10 is activated (S12).

이어서 단상 SRM(10)의 기동이 완료되었는지 판단하고(S13), 기동이 완료되었으면 센서(20)의 출력을 이용하여 RPM을 산출한다(S14).Subsequently, it is determined whether the startup of the single-phase SRM 10 is completed (S13). If the startup is completed, the RPM is calculated using the output of the sensor 20 (S14).

그리고 상기 회전수별 펄스 폭 테이블 값 중에서 현재 검출된 RPM에 해당하는 폭을 갖는 구동 펄스가 출력되도록 구동부(50)를 제어한다(S15).Then, the driving unit 50 is controlled to output a driving pulse having a width corresponding to the currently detected RPM among the pulse width table values for each rotation speed (S15).

이어서 구동부(50)는 제어부(40)에서 조정한 펄스 폭을 갖는 구동 펄스를 출력하고 그에 따라 인가된 전원으로 단상 SRM(10)이 구동된다.Subsequently, the driving unit 50 outputs a driving pulse having a pulse width adjusted by the control unit 40, and the single phase SRM 10 is driven by the applied power.

그리고 운전정지 명령이 입력되는지 판단하여(S16), 운전정지 명령이 입력되지 않으면 현재 단상 SRM(10)의 RPM을 산출하고 그 RPM에 맞도록 최소 펄스 폭 이상 최대 펄스 폭 이하의 범위내에서 구동 펄스의 폭을 조정한다.If it is determined that the operation stop command is input (S16), and if the operation stop command is not input, the RPM of the current single-phase SRM 10 is calculated and the driving pulse is within the range of the minimum pulse width or more and the maximum pulse width to fit the RPM. To adjust the width.

이어서 운전정지 명령이 입력될 때까지 상기 단계(S14,S15)를 반복 수행한다.Subsequently, steps S14 and S15 are repeatedly performed until an operation stop command is input.

결국, 본 발명은 회전수 증가에 따라 구동 펄스의 폭을 증가시켜 단상 SRM이 최대 토크로 운전되도록 함과 동시에 해당 회전수에 따른 펄스 폭의 상한값을 설정하여 과전류를 방지하는 것이다.As a result, the present invention is to prevent the overcurrent by increasing the width of the drive pulse in accordance with the increase in the number of revolutions to operate the single-phase SRM at the maximum torque and at the same time to set the upper limit of the pulse width according to the number of revolutions.

본 발명에 따른 단상 SRM의 과전류 제어장치 및 방법은 단상 SRM의 인덕턴스 특성을 고려하여 각 회전수별로 전류 및 토크를 측정한 시뮬레이션 결과에 따라 과전류를 방지하고 최대 토크를 낼 수 있는 펄스 폭 테이블에 따라 단상 SRM을 구동하므로 과전류를 방지함은 물론이고 최대 토크를 발휘하도록 하여 동작효율을 향상시킬 수 있는 효과가 있다.The overcurrent control apparatus and method of the single-phase SRM according to the present invention according to the simulation result of measuring the current and torque at each rotation speed in consideration of the inductance characteristics of the single-phase SRM according to the pulse width table that can prevent the overcurrent and give the maximum torque Since driving single-phase SRM, it is possible to prevent overcurrent and to exert maximum torque, thereby improving operation efficiency.

Claims (2)

단상 스위치드 릴럭턴스 모터;Single phase switched reluctance motors; 상기 단상 스위치드 릴럭턴스 모터의 회전수를 검출하기 위한 센서;A sensor for detecting a rotation speed of the single phase switched reluctance motor; 직류전원을 소정 구동 펄스에 따라 공급하여 상기 단상 스위치드 릴럭턴스 모터를 구동하는 구동부;A driving unit for supplying DC power according to a predetermined driving pulse to drive the single-phase switched reluctance motor; 상기 센서의 출력에 따라 단상 스위치드 릴럭턴스 모터의 회전수를 산출하고 기저장된 회전수별 구동 펄스 폭 테이블에서 상기 산출된 회전수에 해당하는 폭을 갖는 구동 펄스가 출력되도록 상기 구동부를 제어하는 제어부를 포함하여 구성됨을 특징으로 하는 단상 스위치드 릴럭턴스 모터의 과전류 제어장치.And a controller configured to calculate the rotational speed of the single-phase switched reluctance motor according to the output of the sensor and to control the driving unit to output a driving pulse having a width corresponding to the calculated rotational speed in a previously stored driving pulse width table. Overcurrent control device of a single-phase switched reluctance motor, characterized in that the configuration. 운전명령에 따라 소정의 구동 펄스를 인가하여 단상 스위치드 릴럭턴스 모터를 구동하는 단계;Driving a single-phase switched reluctance motor by applying a predetermined driving pulse according to a driving command; 상기 단상 릴럭턴스 모터의 회전수를 검출하여 해당 회전수에 따른 최대 펄스 폭 이하로 구동 펄스의 폭을 조정하는 단계를 포함하여 이루어짐을 특징으로 하는 단상 스위치드 릴럭턴스 모터의 과전류 제어방법.And detecting the rotational speed of the single-phase reluctance motor and adjusting the width of the driving pulse to be less than or equal to the maximum pulse width in accordance with the rotational speed of the single-phase reluctance motor.
KR1019990033429A 1999-08-13 1999-08-13 Apparatus and method for controlling over current of single phase switched reluctance motor KR20010017761A (en)

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