SU108784A1 - Device for regulating the voltage supplied to asynchronous traction motors - Google Patents

Description

When electric rolling stock operates with traction asynchronous motors, the discrepancy between the characteristics of individual engines and the difference in diameters of the tires of the wheel pairs they drive cause a significant uneven distribution of loads between the traction motors of the locomotive.

The purpose of the present invention is to eliminate this drawback by appropriately adjusting individual motors with the help of a three-phase throttle included in the circuits of their etator windings.

For this purpose, it is proposed to place on each: 1 rod of the throttle several times windings connected in series in the same phases of different engines so that the emf. self-induction, induced in these windings, reduced the voltage across the respective motors, and the emf. mutual induction increased the voltage on these motors.

The drawing shows a schematic diagram of the proposed device with reference to two traction engines.

Asynchronous Dvnat.sh / n 2 are connected to a three-phase current network through a three-phase choke 3. On each terminal of the throttle there are two windings 4 and 5 with the same turn level. The first of these windings is inserted into the motor phase, and the second in the same phase of the motor. 1 2. The windings 4 n J j. Host each rod so that the emf is. self-induction windings in the circuits of each engine reduced the voltage at the terminals of the engines, and the emf mutual induction increased this stress.

The proposed scheme is as follows.

If.1 and the current of the first motor, due to uneven distribution of loads, will become greater than the current of the second motor, then due to the redistribution of voltages between these motors, created by the inductor 3, the voltage becomes less than the voltage Uz, the current of the motor 2 increases. If these currents are equal, the magnetic note in the rods of the throttles will be equal to zero, which makes it possible to perform dowelees with small cores with a small section and with a small number of turns.

When the characteristics of the individual engines are not the same, the Droeyeel 3 makes them identical, and if the diameters of the wheel harnesses are not the same diameters and the same characteristics of the engines, it separates them. Exactly the same, the throttle 3 automatically aligns the currents of the engines at different diameters of the tires of the wheel bunkers and the mismatched characteristics of the engine.

P D E M e of the invention

The device for regulating the voltage supplied to the induction traction motors, using three-phase droes, which are included in the values of their etator windings, is due to the fact that, for the purpose of automatic load balancing separate motors with different characteristics and different diameters of the tires of the moving wheeled trailer, several windings are disposed on each rod of the throttle, connected separately to the same phases of the different engines in such a way that the emf self-induction, inducible in the windings, reduces nanoparticles on the respective engines, and emf. mutual induction increases the voltage on these motors.