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1.发明公开
公开(公告)号：EP0116461A1
公开(公告)日：1984-08-22
申请号：EP84300790.7
申请日：1984-02-08
CPC分类号： H02M1/084 , H02M7/7575 , Y02E60/60
摘要： This invention concerns a multi-loop-control system for convertors of the kind used in h.v.d.c. transmission and industrial applications. The invention consists in a control circuit which effects transfer between two or more control loops, e.g. a constant-current loop and a constant α loop, in a smooth and precise manner, without extra smoothing lags, even in the presence of ripple in the controlled quantities.
摘要翻译： 本发明涉及一种用于h.v.d.c.中使用的类型的转换器的多回路控制系统。 传输和工业应用。 本发明包括一种控制电路，其实现两个或更多个控制环之间的传输，例如， 恒定电流环路和恒定的α环路，以平滑和精确的方式，即使在受控量的纹波存在的情况下也无需额外的平滑延迟。
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公开(公告)号：EP0117668B1
公开(公告)日：1987-04-29
申请号：EP84300791.5
申请日：1984-02-08
CPC分类号： H02M7/7575 , H02M1/084 , Y02E60/60
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公开(公告)号：EP0117668A1
公开(公告)日：1984-09-05
申请号：EP84300791.5
申请日：1984-02-08
CPC分类号： H02M7/7575 , H02M1/084 , Y02E60/60
摘要： A multi phase inverter comprising a bridged array of thyristors (1-12) periodically fired in sequence by a source of firing pulses (19, 20) is provided with a circuit arrangement for controlling each extinction angle (y) of the thyristors individually. Said circuit arrangement comprises means (21) for summing γ signals, means (30) for differencing said sums to generate an error signal (E 1 -E 5 ) and means (22) for applying said error signal to said source of firing pulses at appropriate phase angles to appropriate thyristors so as to tend to equalise said sums, the number of pairs of differenced sums being equal to the number of thyristors in the array. Preferably each error signal acts as constant multiplier of a correction signal which is a harmonic of the A.C. output frequency of the inverter. The arrangement improves the efficiency by enabling each y to be minimised individually without risk of commutation failure.
摘要翻译： 提供了一种多相逆变器，其包括通过点火脉冲源（19,20）按顺序周期性地点火的晶闸管（1-12）的桥接阵列，其具有用于单独控制晶闸管的每个消光角（γ）的电路装置。 所述电路装置包括用于对伽马信号求和的装置（21），用于对所述和进行差分以产生误差信号（E1-E5）的装置（30）和用于在适当相位将所述误差信号施加到所述发射脉冲源的装置 与适当的晶闸管的角度，以趋向于使所述和的均衡，差分和的数量等于阵列中的晶闸管的数量。 优选地，每个误差信号充当作为逆变器的交流输出频率的谐波的校正信号的恒定乘数。 该布置通过使得每个伽马被单独地最小化而提高了效率，而没有换向失败的风险。
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公开(公告)号：EP0116461B1
公开(公告)日：1987-04-29
申请号：EP84300790.7
申请日：1984-02-08
CPC分类号： H02M1/084 , H02M7/7575 , Y02E60/60
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公开(公告)号：EP0124967A1
公开(公告)日：1984-11-14
申请号：EP84301501.7
申请日：1984-03-07
IPC分类号： G01R19/20
CPC分类号： G01R15/185 , G01R19/14
摘要： A D.C. current transformer (CT) (used to measure D.C.) comprising a common primary winding (B) and a pair of saturable magnetic cores (C1, C2) on which respective secondary windings (W1, W2) are wound and connected in opposite senses in series to a source of alternating e.m.f. (E1), is provided with phase-sensitive means (2) for determining the sense of the unknown D.C. (11) in the primary winding. The phase sensitive means periodically senses and integrates the voltage (V1 + V2) (whose waveform is the -45° to +45° portion of a sine wave) across at least one of the secondary windings. The sense of the integrated waveform depends on whether said voltage is initially positive or negative, and is determined by the sense of the unknown D.C. in the primary winding.
Preferably said voltage is sensed at each half cycle of said alternating e.m.f.-
公开(公告)号：EP0124967B1
公开(公告)日：1987-05-20
申请号：EP84301501.7
申请日：1984-03-07
IPC分类号： G01R19/20
CPC分类号： G01R15/185 , G01R19/14
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