• 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 safety circuit for preventing a malfunction from occurring in a phase control system of the type in which the firing angle of thyristors in a thyristor bridge is controlled to regulate the rotational speed of a DC motor constituting the load of the thyristor bridge. Thyristor firing pulses are produced each time a rising analog speed command signal (FS) intersects N-number of sawtooth signals. The arrangement is such that, immediately after the generation of each firing pulse, the thyristors are not supplied with extraneous firing pulses at least for a time interval (t) equivalent to the thyristor commutation overlap time.
    公开号:SU1205791A3
    申请号:SU813348167
    申请日:1981-10-30
    公开日:1986-01-15
    发明作者:Кобари Кацуо；Хатисука Есиаки
    申请人:Фудзицу Фанук Лимитед (Фирма)；
    IPC主号:
    专利说明:

    The invention relates to electrical engineering and can be used to protect against malfunctions of a DC motor rectifier.
    The aim of the invention is to increase reliability. FIG. 1 shows a functional device skem; in fig. 2 explanatory time diagrams.
    A device for controlling a multiphase thyristor DC motor, including a power source 1, phase reactors 2, a thyristor bridge rectifier 3 and a DC motor 4, contains control channels 5, in. the number of phases and in each control channel generator 6 sawtooth voltage and block 7, control the moment of unlocking the thyristors of the electric drive, to the first input of which is connected) to the output of the generator 6 of this channel, to the second - to the common input of all channels of the adder 8, to the first input which is connected to the load current sensor 9, and to the second - the output of the additional adder 10, the first input of which is connected to the output of the reference signal source 11, and the second input to the sensor 12 of the engine speed 4. Between the output of the adder 8 and the common bus, the transis This is 13, the base of which is connected to the output of the spreader 14 of start pulses j whose input is connected to the output of the block 15 of start pulses, the input of which is connected to the output of the element OR 16 whose inputs are connected to the outputs of the control blocks 7. The adder 8 and the additional adder 10 each performed on the series-connected summing element 17 and the amplifier 18.
    The device works as follows.
    A command signal corresponding to the speed value, VCMD from the reference signal block 11 is fed to the first input of the additional adder 10. Initially, the signal has a relatively low value, so that the DC motor 4 rotates at a low speed. The command speed signal VCMD is subjected to negative feedback in the adder 10 due to the signal from the speed sensor 12. The signal is
    0
    the lovine obtained at the output of the summing element 17 of the adder 10 from the VCMD signal and the feedback signal is amplified by the amplifier 18
     adder 10 and then enters on
    the summation element 17 of the adder 8, where it is subjected to the influence of negative feedback provided by the signal coming from
    sensor 9, responsive to the magnitude of the current. The resulting error signal is amplified by the amplifier 18 of the adder 8 to such an extent as to form the input signal of the regulation of ignition,
    5-FS, which, in turn, is fed to the second inputs of control blocks 7, which are included in the corresponding control channels 5 - U, V5W5 and the other inputs of these blocks are respectively, sawtooth signals bi, 6V, 6W (see Fig. 2A) . After a certain time has elapsed, the FS signal intersects the 6V ramp line. at
    , the circuit block 7 control phase U at time tc ,. This event is detected by the i-phase control unit 7, which starts forming a signal, on the basis of which the thyristor unlocking torque control unit 7 generates firing pulses tlo ,, th ,, Pulses. served on the corresponding thyristors THI, THj of the rectifier 3, which under their influence are transformed into a conducting state. Ignition pulse th | , after passing through the OR element 16, is converted by the start-up unit 15 into a pulse, shown in FIG. 2B, and then fed to a pulse expander 14, which generates a trigger pulse, shown in FIG. 2C, and is applied to the base of the transistor 13. Because the pulse duration of this signal is equal to t, the transistor 13 becomes embedded in the time t.B the result of this is in those cases x. when the input signal 5 changes abruptly (la during the switching of the thyristors in the thyristor bridge 3, the transistor 13 keeps said signal at a level that is low enough to avoid 5; spurious ignition during the switching of the thyristors. This makes it possible to prevent the thyristors from accidentally lighting the course of regulation.
    0
    five
    0
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    31205791
    Thus, by introducing the operation of the device for controlling the blocking element and the system of its multiphase thyristor electrical start-up, the reliability of direct current water increases.
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    Compiled by Zhmurov Editor Y. Tsitkina Tehred T. Dubinchak Proofreader E. Roshko
    Order 8552/63 Circulation 645 Subscription VNIIPI USSR State Committee
    for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab ,, d.4 / 5
    Branch PPP Patent, Uzhgorod, st. Project, 4
    AL
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    权利要求:
    Claims (1)
    [1]
    DEVICE FOR CONTROLLING A MULTI-PHASE THYRISTOR DC ELECTRIC DRIVE, containing a reference signal source, an adder, the first input of which is connected to a load current sensor, control channels by the number of phases and in each control channel a sawtooth voltage generator whose output is connected to the first input of the control unit 'moment unlocking the thyristors of the electric drive, the second input of which is connected to the output of the adder, characterized in that, in order to increase reliability, it is equipped with an OR element, a pulse block start, with a start pulse extender, a transistor, an engine speed sensor and an additional adder, the first input of which is connected to the output of the reference signal source, the second input is to the engine speed sensor, and the output is to the second adder input, between the output of which SB and the common bus the transistor is connected whose base is connected through series-connected expander of triggering pulses and block of triggering pulses to the output of the OR element, the inputs of which are connected to the outputs of the control units the moment of unlocking each channel la.
    SU. ,,, 1205791>
    1 1205791
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    同族专利:
    公开号 | 公开日
    US4409648A|1983-10-11|
    KR830008215A|1983-11-16|
    EP0051416B1|1986-01-15|
    EP0051416A1|1982-05-12|
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    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US3304486A|1963-05-17|1967-02-14|Gen Dynamics Corp|Voltage regulation for a. c.-to-d. c. converters|
    US3579079A|1965-11-17|1971-05-18|Gen Electric|Current source magnetic gating circuit for controlled rectifiers|
    SE349710B|1971-02-02|1972-10-02|Asea Ab|
    US3671836A|1971-03-31|1972-06-20|Gen Electric|Power conversion control system|
    US4128869A|1977-01-12|1978-12-05|Ermolovich Eduard S|Phase control arrangement of valve converter|
    JPS5722487B2|1977-07-13|1982-05-13|
    JPS574925B2|1977-09-28|1982-01-28|JPS57193966A|1981-05-19|1982-11-29|Mitsubishi Electric Corp|Gate pulse phase device|
    DE3427825A1|1984-07-27|1986-02-06|MITEC Moderne Industrietechnik GmbH, 8012 Ottobrunn|RECTIFIER|
    GB2209441B|1985-12-10|1989-12-13|Ssd Ltd|Improvements relating to ac/dc converters|
    US5003455A|1990-08-14|1991-03-26|Polyspede Electronics Corporation|Circuitry and method for controlling the firing of a thyristor|
    JP3480718B2|2000-09-27|2003-12-22|シャープ株式会社|Phase control circuit and switching regulator|
    KR100429655B1|2001-01-31|2004-05-03|한국전력공사|Control signal generator of exciting system|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    JP55152698A|JPS5776616A|1980-10-30|1980-10-30|Malfunction preventing circuit for phase control mechanism|
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