公开(公告)号：US3952139A

公开(公告)日：1976-04-20

申请号：US534831

申请日：1974-12-20

Applicant: Peter Burkle ,  Wolfgang Timpe ,  Friedrich Werner Thomas

Inventor： Peter Burkle ,  Wolfgang Timpe ,  Friedrich Werner Thomas

IPC: C22B9/18 ,  G05F1/44 ,  H05B3/00 ,  H05B7/148

CPC classification number: G05F1/44 ,  C22B9/18 ,  H05B3/0023

Abstract: The invention concerns a converter arrangement for electrode melting furnaces, particularly for electric slag remelting of metals. A current regulator in the form of a PI controller is associated with the converter arrangement. The former is influenced by an actual current value, a reference current value, and additionally, by a control quantity. The control quantity replaces the current regulation of the regulator by a voltage control in dependence on periodic or aperiodic conditions which may be due to operational causes or to trouble and interfere with the melting process in the furnace. More particularly, for the duration of such conditions, the control quantity causes the output voltage of the regulator, which voltage acts on the control unit feeding the converter, to be limited upward to an adjustable value.

Abstract translation: 本发明涉及用于电极熔化炉的转换器装置，特别是用于金属的电渣重熔。 PI控制器形式的电流调节器与转换器装置相关联。 前者受实际电流值，参考电流值以及控制量的影响。 控制量通过电压控制取代调节器的电流调节，这取决于可能由操作原因引起的周期性或非周期性状况，或者是故障并干扰炉中的熔化过程。 更具体地说，在这种条件的持续时间内，控制量使调节器的输出电压（该电压作用在馈送转换器的控制单元上）被限制在可调整的值上。

公开(公告)号：US4074348A

公开(公告)日：1978-02-14

申请号：US663131

申请日：1976-03-02

Applicant: Theodor Salzmann ,  Wolfgang Timpe ,  Manfred Weibelzahl

Inventor： Theodor Salzmann ,  Wolfgang Timpe ,  Manfred Weibelzahl

IPC: H02M5/27

CPC classification number: H02M5/271

Abstract: A circuit arrangement is disclosed comprising a converter for converting a three-phase system of sinusoidal voltages into three trapezoidal control voltages for controlling control units serving three direct cycloconverters. More particularly, in accord with the invention, the converter acts on the sinusoidal control voltages such that during each region from .pi./3 to 2.pi./3 of a half-wave of each particular voltage that voltage is reduced to .sqroot.3/2 times its peak value, while the other two voltages are amplified or increased by an amount equal to the difference between the aforesaid peak value and .sqroot.3/2 times such peak value.

公开(公告)号：US3974436A

公开(公告)日：1976-08-10

申请号：US577851

申请日：1975-05-15

Applicant: Wolfgang Timpe

Inventor： Wolfgang Timpe

IPC: H05B7/148 ,  G05F1/12 ,  G05F1/44 ,  G05F1/56 ,  H02M1/18

CPC classification number: G05F1/44 ,  G05F1/12

Abstract: The invention concerns a circuit arrangement for use with an electric melting furnace of a type which is fed by a converter, the latter converter being equipped with thyristors and controlled by a control unit and a series-connected current regulator. More specifically, in accord with the invention, the circuit arrangement is provided with monitoring circuits for monitoring the operation of the thyristors. These monitoring circuits, in turn, generate signals which control switches for selectively short-circuiting the feedback resistors of the regulator.

Abstract translation: 本发明涉及一种与电熔炉一起使用的电路装置，该电熔炉由转换器馈电，后者的转换器配有晶闸管并由控制单元和串联电流调节器控制。 更具体地，根据本发明，电路装置设置有用于监视晶闸管的操作的监视电路。 这些监控电路又产生控制开关的信号，以选择性地使调节器的反馈电阻短路。

公开(公告)号：US3970914A

公开(公告)日：1976-07-20

申请号：US561279

申请日：1975-03-24

Applicant: Theodor Salzmann ,  Franz Wesselak ,  Wolfgang Timpe

Inventor： Theodor Salzmann ,  Franz Wesselak ,  Wolfgang Timpe

IPC: H02M5/27 ,  H02M5/45

CPC classification number: H02M5/271

Abstract: A circuit arrangement is disclosed comprising three direct converters which are fed from an a.c. voltage network. The converters are arranged in a Y configuration and are connected to a three-phase load. To increase the transmitted power and to vary the reactive power requirement, the circuit arrangement is provided with means for generating a control voltage for the control unit of at least one of the three converters such that the output voltage of this converter has a periodic waveform which includes essentially no fifth and seventh order harmonics. Additionally, the load-side conductor currents of the three converters are controlled with control signals having sinusoidal waveforms. A particular form used for the control voltage is a trapezoidal waveform.

Abstract translation: 公开了一种电路装置，其包括三个直接转换器，它们从一个交流电 电压网络。 这些转换器被配置为Y配置并连接到三相负载。 为了增加发射功率并改变无功功率需求，电路装置设置有用于产生用于三个转换器中的至少一个的控制单元的控制电压的装置，使得该转换器的输出电压具有周期性波形， 基本上不包括第五和第七阶谐波。 此外，三个转换器的负载侧导体电流由具有正弦波形的控制信号控制。 用于控制电压的特定形式是梯形波形。