Abstract: A system and method for controlling a rectifier due to changing operating conditions including at least one reactor per phase connected to the rectifier for providing an input signal, a bias current for controlling the reactor, and a control current for controlling the reactor. The bias current is fixed to a predefined value which is taken as an input signal for providing a control current compensating the difference between the predefined value of the bias current and a start value defining a start point of the linear operating range of the reactor.
Type:
Grant
Filed:
October 19, 2015
Date of Patent:
July 5, 2016
Assignee:
ABB Technology AG
Inventors:
Alexander Ackeret, Micha Gilomen, Wynand Marthinus Lauwrens
Abstract: A multi-well diode is disclosed which can be used with other electronic components as an electronic neuron circuit. Structural embodiments of the multi-well diode are disclosed having a p-i-n, n-i-n, or p-i-p configurations. In addition, the wells of the i-region are disclosed as being either n-type or p-type semiconductor material. The multi-well diode has an S-shaped current-voltage characteristic curve at forward bias whereby it remains in a low conductance state until its threshold voltage is exceeded, then switches through an unstable region of its characteristic curve into a high conductance state. The multi-well diode remains in the high conductance state until its bias voltage and current drops below its holding condition, at which time it switches into a low conductance state. The multi-well diode can be used in a pulse-mode input circuit, thereby generating a pulse-mode output signal which can have a different amplitude and frequency than the input signal.