摘要:
Gegenstand der Erfindung ist ein Flurförderzeug mit einer Spannungsversorgung (1), einer Steuerelektronik (2) und einem elektrischen Antrieb (4). Das Flurförderzeug kann mit Spannungsquellen (1) unterschiedlicher Nennspannung betrieben werden. Insbesondere können Spannungsquellen (1) mit einer Nennspannung zwischen 12 V und 120V verwendet werden. Als Spannungsquelle (1) können insbesondere Batterien oder Brennstoffzellen verwendet werden. Das Flurförderzeug weist Aufnahmevorrichtungen für Spannungsquellen (1) unterschiedlicher Nennspamnnungen auf.
摘要:
A direct current to direct current converting chopper device comprising essentially two switching elements, two reactors, two diodes and three condensers likewisely with a conventional device but able to maintain rather stable output voltages to avoid higher harmonic noises and able to provide output voltage higher than the input voltage.
摘要:
The invention relates to a voltage supply device for a load, in particular for a network, having an energy store that can be connected to connection terminals and a voltage transformer comprising at least one electronic switch. According to the invention, means for reverse polarity protection are in contact with the connection terminals and are designed to convert voltage delivered from the energy store into control voltage for active activation of the electronic switch when the polarity of said voltage is reversed.
摘要:
L'invention concerne un circuit de correction de facteur de puissance, comprenant un convertisseur de type Boost comportant un interrupteur commandé par un circuit de commande (12), un premier condensateur de sortie (C 1 ) et une première inductance série d'entrée (L 1 ), une diode (D) étant connectée en série avec ladite première inductance entre l'interrupteur commandé et le condensateur de sortie. Ledit interrupteur commandé est formé d'un thyristor (10) et d'une diode antiparallèle (11), et des moyens (L r , C r ) sont prévus pour garantir l'annulation du courant dans le thyristor pendant un temps suffisant à l'ouverture de ce dernier.
摘要:
A low impedance polarity conversion circuit for driving a load with a DC power source is disclosed. The DC power source has a first pole from which a first DC signal originates and a second pole from which a second DC signal originates. The first DC signal has a voltage greater than a voltage of the second DC signal. The conversion circuit includes a circuit output node through which an output DC signal is delivered from the conversion circuit to the load. The conversion circuit also includes a charge conditioning circuit for generating third and fourth DC signals. The third DC signal has a voltage greater than the first DC signal voltage and the fourth DC signal has a voltage less than the second DC signal voltage. A rectification circuit includes first and second inputs for attachment to the first pole and the second pole. A Field- Effect Transistor (FET) bridge is electrically connected to the first and second inputs. The FET bridge includes first and second pairs of cooperating FETs. The third voltage controls a first of the first pair of FETs and a first of the second pair of FETs. The fourth voltage controls a second of the first pair of FETs and a second of the second pair of FETs. The FET bridge is for rectifying the first and second DC signals in order that the output DC signal is the same polarity irrespective of whether the first input is attached to the first pole or the second pole.
摘要:
A capacitor-type pulse discharge apparatus for generating an electric current pulse through an electrical load, comprises an electrical power source and at least one pulse discharge switch module. The pulse discharge switch module includes a capacitor for storing an electrical energy, a semiconductor high-power switch and a semiconductor low-power switch connected to the same terminal of the capacitor. The high-power switch has an input connected in series to the capacitor for allowing the stored electrical energy to be transferred from the capacitor to the load, and the low-power switch has an input connected in series to the capacitor for allowing charging supply from the electrical power source to charge the capacitor.