• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    A system for a DC motor (1) associated with a field winding (2) and driven by using a three-phase anti-parallel thyristor bridge circuit (3), comprising a first means for controlling an armature current la flowing through an armature (1') of the DC motor (1), and; a second means for controlling a field current If flowing the field winding (2) by obtaining the feedback values of a voltage Ea of the armature (1') and the field current If and by changing the maximum level of the current If in accordance with a three-phase alternating voltage Vac applied to the three-phase anti-parallel thyristor bridge circuit (3). In the system, when the three-phase alternating voltage Vac decreases to a value lower than a predetermined value Vo, the field current If are decreased so that the armature voltage Ea is decreased.
    公开号:SU1102497A3
    申请号:SU792821099
    申请日:1979-10-01
    公开日:1984-07-07
    发明作者:Кавада Сигеки；Фугиока Есики；Охта Наото
    申请人:Фудзицу Фанук Лимитед (Фирма)；
    IPC主号:
    专利说明:

    The excitation role contains a successive OD (the integrator and the output amplifier are connected, the input of the integrator being).
    1102497
    ohm and the output of the control unit amplifier is excited
    I
    The invention relates to electrical engineering and can be used to regulate the speed of direct current electric motors. ;
    The electric drive containing the electric motor, the main winding of which is connected to the direct current terminals of two on-line thyristor bridges, the current sensor core connected to the bridge thyristor control unit lj is known.
    The closest to the present invention is a DC electric drive containing an electric motor with an independent excitation winding, two three-phase thyristor bridges connected in parallel to the DC terminals of which are connected to the root winding of the electric motor and KA power source, serially connected regulators speed and current, the input of the speed regulator is connected to the reference unit and the speed sensor, and the output of the current regulator is connected to the three-phase thyristor control unit bridge bridges, a thyristor converter included in the excitation winding circuit with a control unit, excitation current and voltage sensors of the electric motor 2.
    However, the reliability of operation of the circuits is insufficient, since the switching of the bridge valves may be disrupted when the supply voltage decreases, as a result of which an emergency current flows through the electric motor, leading to damage to the electric motor.
    The purpose of the invention is to increase the reliability of the drive.
    The goal is achieved by the fact that the DC motor contains a motor with an independent excitation winding, two three-phase thyristor bridges connected oppositely in parallel, the DC terminals of which are connected to the AC terminals — a power source connected in series speed and current tori, the speed controller input is connected to the reference unit and the speed sensor, and the current controller output is connected to the three-phase Tiris control unit A bridge bridge, a thyristor converter included in the excitation winding circuit with a control unit, excitation current and motor voltage sensors, two detectors, an excitation control unit, an excitation control unit and a comparator unit are inserted, the first and second detectors and the regulating unit are connected to the three inputs. excitation, the inputs of which are connected respectively to the motor voltage sensor, to the excitation current sensor and to the power source, the output of the comparator through the excitation control unit with One with the control unit of the thyristor converter included in the drive coil circuit.
    The first detector contains a rectifier with an output filter and two amplifiers connected in series, the input of the first amplifier connected to the filter, and the output of the second amplifier is the output of the first detector.
    The second detector comprises a filter and an amplifier in series, the output of which is the output of the second detector.
    In addition, the excitation control unit contains a rectifier, a voltage divider connected to the resistors, a diode, a setpoint unit and a transformer, the primary winding of which is connected to the power supply, and the secondary to the rectifier, the divider output is connected to the output of the rectifier. and whose midpoint is connected
    with the cathode of the diode, and its anode - with the unit settings.
    The excitation control unit contains a series-connected integrator and amplifier, the integrator input being the input and the amplifier output the output of the excitation control unit.
    Figure 1 presents the scheme of the drive; Fig. 2 shows diagrams of detectors, excitation control unit and excitation control unit} fig. 3 are diagrams explaining the operation of the electric drive.
    The DC electric drive contains an electric motor 1 with an independent winding 2 ramps, two switched-on paralleleJ; JHHo three-phase thyristor bridges 3 | and 4, to the direct current sources, the root winding of the electric motor, tel 1, and the alternating current source 5 power supply, serially connected speed regulators 6 and 7 current, connected to the speed regulator 6 input and connected to the task unit 8 and the sensor 9 speed, and current regulator 7 is connected with current sensor 10 and control 11 of three-phase thyristor bridges 3 and 4, thyristor converter 12, switched on by excitation winding 2, with control block 13, excitation current sensors 14 and motor voltage 15 1. Except In addition, the electric drive contains two detectors 16 and 17, a regulating unit 18 for the excitation day, an excitation control unit 19 and a comparison unit 20, the detectors 16 and 17 and the excitation control unit 18 are connected to the inputs, and the inputs are connected to the sensor 15, respectively. the motor 1, the excitation current sensor 14 and the power source 5, the output of the comparison unit 20 through the block 19; the excitation control is connected to the control unit 13 of the thyristor converter 12 connected to the excitation winding circuit.
    In addition, the detector 16 is equipped with an output filter 21 and two amplifiers 23 and 24 connected in series, the input of the amplifier 23 being connected to the filter 22, and the output of the second amplifier 24 is the output of the detector 16.
    The detector 17 includes a filter 25 and an amplifier 26, the output of which is the output of the second detector 17.
    The excitation control unit 18 contains a rectifier 27, a voltage divider implemented on resistors 28-30, a diode 31, a setpoint block 32 and a transformer 33i whose primary winding is connected to the power supply 5, and the secondary to the rectifier 27, to the output of the A metel is connected to a voltage divider, the midpoint of which is connected to the cathode of the diode 31, and its anode is connected to the setpoint block 32. Thyristor converter 12 is connected to power supply 5 via transformer 34.
    The excitation control unit 19 comprises a series-connected integrator 35 and an amplifier 36, the integrator input being the input and the amplifier output the output of the excitation control unit 19. Current sensor 10 is connected to current regulator 7 through rectifier 37.
    The drive works in the following way.
    In the steady state, the electric drive operates on the principle of a subordinate control using speed regulators 6 and 7 currents, speed sensors 9 and 10 currents, and a set B block.
    The signals from the outputs of the detectors 16 and 17 and the excitation control unit 18 are balanced, and the voltage on the core of the electric motor 1 and the excitation current are maintained in the manner shown in Fig. Clai. In the interval 1 (constant torque), at which the motor speed is relatively small, the excitation current 3 is maintained at the level of DQ, while the voltage on the core Eq changes as the speed N of the electric motor 1 changes.
    In the interval And (constant power), in which the motor speed is relatively high, the voltage level on the core E (j motor 1 is maintained at E, while the excitation current 3 varies in accordance with the speed of motor 1 (FIG. 3) Fig. 3e shows the changes in the current II IIQ and the power P of the electric motor 1.
    When the voltage of the power source 5 is equal to or greater than the predetermined voltage UQ of the device 32, the diode 31 in the excitation control unit 18 is locked.
    When the supply voltage drops below the setpoint, the diode 31 is unlocked, the signal from the output of the excitation control unit 18 changes and the corrected signal from the comparison unit 20 through the excitation control unit 19 is supplied to the thyristor converter control unit 13 T2 connected to the excitation winding 2.
    Thus, when the supply voltage changes, the motor excitation current changes, thereby eliminating the failure of switching thyristor bridges and increasing the reliability of the device.
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    权利要求:
    Claims (5)
    [1]
    1. A DC electric drive, containing an electric motor with an independent field winding, two on-parallel three-phase thyristor bridges connected to the terminals of the direct current of which is connected to the armature winding of the electric motor, and to the terminals of the alternating current source ... power supply, speed and current regulators connected in series moreover, the input of the speed controller is connected to the reference unit and the speed sensor, and the output of the current controller is connected to the control unit of the three-phase thyristor bridges, the thyristor converter spruce included in the field winding circuit with a control unit, field current sensors and electric motor voltage, characterized in that, in order to increase its reliability, two detectors, a field control unit, a field control unit and a comparison unit, are introduced into it the inputs of which the first and second detectors and the excitation control unit are connected, the inputs of which are connected respectively to the motor voltage sensor, to the excitation current sensor and to the power source, the output of the comparison unit through the unit warning light excitation is coupled to the thyristor converter control unit included in the field winding circuit.
    [2]
    2. The electric drive according to claim 1, characterized in that the first detector comprises a rectifier with a filter at the output and two amplifiers connected in series, the input (8 of the first amplifier being connected to the filter, and the output of the second amplifier being the output of the first detector.
    [3]
    3. The electric drive according to claim 1, about aphids - 8, characterized in that the second detector contains a series-connected filter and amplifier, the output of which is the output of the second detector.
    [4]
    4. The drive according to claim 1, characterized in that the excitation control unit comprises a rectifier, a voltage divider made on resistors, a diode, a set point and a transformer, the primary winding of which is connected to a power source, and the secondary to a rectifier, connected to the output of the rectifier a voltage divider, the middle point of which is connected to the cathode of the diode, and its anode is connected to the set point.
    [5]
    5. The drive according to claim 1, characterized in that the control role block 1102497 'of the field of excitation contains an integrator and an amplifier connected in series, the integrator input being an input,. and the output of the amplifier by the output of the excitation control unit. ·,
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    同族专利:
    公开号 | 公开日
    EP0009784B1|1983-01-12|
    US4284932A|1981-08-18|
    DE2964493D1|1983-02-17|
    JPS5549990A|1980-04-11|
    EP0009784A1|1980-04-16|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    DE928054C|1951-11-18|1955-05-31|Brown|Method and arrangement for regulating direct current motors|
    AT281210B|1967-09-30|1970-05-11|Siemens Ag|Meshed control device for reversing the current direction of a converter with anti-parallel switched valve groups|
    US3536957A|1968-10-10|1970-10-27|Smith Corp A O|Polyphase circuit input fault detection system|
    US3584706A|1968-10-10|1971-06-15|Reliance Electric Co|Safties for elevator hoist motor control having high gain negative feedback loop|
    JPS5526799B2|1974-04-23|1980-07-16|
    US3961688A|1974-04-29|1976-06-08|Armor Elevator Company|Transportation system with malfunction monitor|
    US3950684A|1974-05-29|1976-04-13|Westinghouse Electric Corporation|Direct current motor speed control apparatus|
    JPS5517406B2|1975-04-21|1980-05-12|
    JPS5755040B2|1976-04-02|1982-11-20|
    CH604272A5|1977-06-07|1978-08-31|Landis & Gyr Ag|GB2074404B|1980-04-11|1983-10-19|Hitachi Ltd|Chopper controller for a dc motor|
    US4408147A|1981-03-19|1983-10-04|Jonathan Gabel|Method and apparatus for high efficiency operation of electromechanical energy conversion devices|
    US4450395A|1982-06-21|1984-05-22|Toshiba Kikai Kabushiki Kaisha|System for controlling synchronous motors|
    JPS59159602A|1983-03-03|1984-09-10|Toshiba Corp|Thyristor firing angle controller for ac electric rolling stock|
    US4549122A|1983-09-14|1985-10-22|Allen-Bradley Company|Method and circuit for DC motor field regulation with speed feedback|
    DE3541276A1|1985-11-22|1987-05-27|Heidelberger Druckmasch Ag|CONTROL DEVICE FOR A FOREIGN REGULATED DC DRIVE MOTOR AND METHOD FOR CONTROLLING A DC DRIVE MOTOR OF A PRINTING MACHINE OR THE LIKE|
    US4687657A|1986-06-09|1987-08-18|Celanese Corporation|Fabrication of SiC - AlN alloys|
    JPS631306A|1986-06-20|1988-01-06|Hitachi Ltd|Chopper control system|
    FI875074A|1986-12-04|1988-06-05|Kontron Holding Ag|STYRNING AV EN MOTOR.|
    US5585706A|1991-12-31|1996-12-17|Avitan; Isaac|Speed regulation of DC motor using current sensing means|
    US5453672A|1991-12-31|1995-09-26|Avitan; Isaac|Regulation system for decoupled efficiency optimized operation of DC traction motors|
    GB2270215B|1992-08-28|1996-06-26|Yang Tai Her|Control circuit for an electrical DC machine|
    US5321343A|1993-02-16|1994-06-14|Aeg Automation Systems Corporation|Digital motor control system|
    US6021251A|1997-07-08|2000-02-01|Crown Equipment Corporation|Compensated field current control for a separately excited DC motor|
    KR100786059B1|2000-12-01|2007-12-17|엘지전자 주식회사|method for controlling dehydration speed in drum-type washing machine|
    JP3833600B2|2002-10-08|2006-10-11|三菱電機株式会社|Vehicle AC generator failure determination device|
    JP3797972B2|2002-11-29|2006-07-19|三菱電機株式会社|Generator motor system for vehicles|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    JP12037478A|JPS5549990A|1978-10-02|1978-10-02|Drive system for dirrect current motor|
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