DE1563961A1 - Circuit arrangement for driving a single or multi-engine electric traction vehicle - Google Patents

Description

Lieentia Fatent-YerwaXtungs-G- * ήι.b «Η. Franfcfmrt / Main, Sh © odör-St '© rn-Kai- 1

GrütESiaim / olf. . Εγ £ -ΪΓγ Gn 40/048

SchaliTutngsanor & nung »to drive a © la or multi-engine -electric

The invention relates to a Sciaaitungsaaordnung for driving an electric motor vehicle fed from a yöch3ölstr0ßinets with one or more (Jieichatroiamotoren. It is known that DC motors serving as fan motors from an alternating tr omaeta via controllable rectifier arrangements they have to feed as cheap -Brückönanordnunsen with two controllable and "wai not controllable StroinriehtervBntilen er ^ riasön. You controllable Stroiarichterventile here without the rectification an incision control and thus a continuous voltage adjustment, so that the flow converter transformer, in particular the development of a high-performance semiconductor valve" can be implemented The development of the thyristors has led to the fact that the number of current converter drives is constantly growing *

rteu documents. [Nt 751 ^ -? ■ No. ι w- j <■ '■ "-, its. Ν. 4.9. Mn

BATH ORIGINAL 009831/0247

For control bawr control of such motor vehicles are several Reg! Vorfahr, like s * B. the Stroaregelsmg (2ugkraffe- · regulation), the voltage regulation with current limitation and the speed regulation (speed regulation) with current limitation known ·

In the above-mentioned processes, various systems carried out the known skidding of the axles when the adhesive value was exceeded swlsehezi bath and rail at the earliest possible stage . to limit. For this, however, a considerable additional effort is required. Nevertheless, the mode of operation of the equipment used was inadequate. Essentially, three hundred methods have been used up to now to record the skidding.

However, in one method the armature currents similarly loaded Hotoren were compared and the leg spin occurring current difference recorded ₃ Here w ae to be accepted that or- due to unavoidable Stromunsy'ametrien due to hot and Radreif intolerances as well as the circumstances of the tracking ( Sinus run of the bath set in the track) an unemotional area is necessary for the detection of the skidding. Another disadvantage of this method is to be seen in the fact that, when the axes used for comparison skid on the same side, detection is difficult. However, it is advantageous that this comparison is also effective in the particularly critical case when the motors are almost at a standstill, provided that only one axis begins to spin.

009831/0247 bathroom original

In the second Η © thods there is a comparison of the Brelusahlea instead of »Basically the same slopes are here! before how with the current difference chamfering »Be must also here the Tolerances in a sensitivity zone are taken into account There is also the fact that, especially when driving, i.e. at low speed, the measurands are very small and therefore the establishment is very insensitive if you don't have one Amplification of the measured variable makes. But that in turn has the Disadvantage »that an unwanted intervention at high speeds in the scheme can take place. Xn same catfish as with the current difference detection method described above this procedure is also ineffective if, as with today Preferably built running axless locomotives are unavoidable, two driving axles used for comparison are the same spin early *

In the case of newly developed locomotives, the current conducting method known from drive technology for stationary systems was used, doh «, and the locomotives were fitted with armature clamps control ait subordinate current control «With this procedure the current regulator is controlled by an upstream voltage regulator guided.

The invention is based on the object in such a frlebfahrseug the well-known skidding world-wide and prevent the night "! Io of the methods described above to capture the Sehleuder & s au avoid. As a result, concerns the Erfiaduag a circuit arrangement for driving an over

BATH ORIGINAL

controllable power converter fed from an alternating current network single or multi-engine electric traction vehicles using a an armature voltage control with subordinate current control. It is characterized by the fact that the actual armature voltage values of all drive motors are used to avoid skidding are fed to a common voltage regulator and compared with a common voltage target value «,

This results in the highest actual armature voltage value in each case the voltage regulator leads. For motors with an armature current-dependent premd field, the following conditions apply: At the moment in your the static friction in the so-called sliding Friction passes over, the skidding motor becomes streamlined relieves the load and generates a higher voltage compared to the previous one in the field that changes only slowly due to the high time constant Operating condition. A sensitive voltage regulator reacts to this increase in voltage to the effect that it does guided current regulator resets as long as the motor voltage has almost reached the set »setpoint again. This behavior basically applies both to individual power supply (each motor on a separate converter) and to busbar supply (one or more motors in parallel on one only one converter gsapeisten busbar). With self-excited Motors with series output behavior basically the same applies as previously described. Because of the non-linear magnetization characteristic of the motor and because of the turmoil of the converter Motors conventional Neböntdcler lying parallel to the field winding As it stands, the magnetic field does not immediately follow the load shedding, so that as a result of the increase in speed that occurs when the sliding

009831/0247

'- 5 -. ^: 'Gn "40/048

the friction occurs, an increase in the armature tension takes place first «. It is beneficial that not only the hot or voltage but also the hot currents can be recorded individually. The drive motor voltage is more suitable as a measured variable than the other variables, such as rotors or currents, since they are already at low speeds vsrproportional. "is high and recorded in its absolute value -will * The problematic difference formation is superfluous because the actual voltage values are only compared with the nominal voltage. The target voltage is set by the driver via the control unit This is the default for the particular operating state .excepted © Hotorspannuag specified *

In the 'drawing is a basic circuit diagram - such a Drive train- shown *

The primary winding 1 a of a transformer 1 is connected to an alternating current network (not shown). A first self-winding winding 1b is connected to the alternating current connections of a controllable stray judge bridge arrangement 2, which in the present example is designed as a so-called asymmetrical, semi-controlled bridge arrangement. This converter beatehfc auo two non-controllable converter valves and two controllable converter valves "The direct current connections - are connected to armatures connected in parallel - .3a to 3d of the traction motors, the armatures each with an unspecified, non-controllable converter valve and a smoothing throttle in. Ee" they are switched. In the present example, the excitation windings of the driving motors are fed via separate controllable ^ G-loichcichijoranor / demmen ..! Qi © Ankerap-aamungen O ^ to U ^ j clec Fahrmot.or © n have been discovered; and al'ei lütuevte im FuDlrfe 4 with

009831/0247

BATH

s _

dsm specified voltage SoXIweri; ΤΤ _βο11 varglicfeön “The difference between the setpoint and the coarsest actual value is fed to a voltage regulator 5, which supplies a setpoint for the downstream current regulator 7. At point 6, this nominal current value is compared with the actual current values. The phase position of the control pulses supplied by the pulse generator 8 is determined by the output value of the current regulator 7. Since these are generally too weak to ignite several thyristors at the same time, they are amplified in a downstream pulse amplifier 9

The controllers, pulse generators and pulse amplifiers used are known per se. They are therefore only shown schematically. Of the also only schematically shown target / actual value comparison of the Armature voltage can, for example, be done with the help of resistors connected in parallel and decoupled via diodes.

It goes without saying that the drawing is only one possible Example of the circuit arrangement used. Of course Instead of the half-controlled converter arrangements, fully-controlled converter arrangements, and can also be used A single motor feed is used instead of the Samael rail feed will·

6 pages description

1 claim

1 sheet of drawing old 1 figure

009831/0247

Claims (1)

[Specimen copy j Must not be changed yterÄepJ - ρ ^, η -j .. Lieenti © Grützia & nn / olf. . . η - Gn 40/048 Pa te η ta η s ρ r u ch: Circuit changes to drive e5.nes via controllable power converters from a Wöehselstroianetz spöisten ein or möarmot origea © lektri see Sri ö "b vehicles under Yörwung one Armature voltage control with superimposed current control, characterized in that to avoid skidding the Aiikerspnunga actual values of all drive motors to a common Voltage regulators are supplied and compared with a common voltage setpoint Blank page