SU48925A1 - Multipoint Welding Unit - Google Patents

Description

The present invention relates to a device for multi-station welding consisting of a high frequency generator, the current of which is applied to the current of a normal DC generator to create a pulsed welding current with an increased arc ignition voltage. In order to use a high-frequency generator as a compensator to increase the co-network, a specially-connected asynchronous machine was used as the specified generator.

The drawing shows a schematic diagram of the proposed unit for. multipoint welding, vypolyenpay. As noted above, from a normal post-current generator 1 driven by three-phase asynchronous motor 3, and a high-frequency generator consisting of two-phase asynchronous motors 4 and 2 connected by a coupling. The power supply of the first engine occurs in the usual way through the stator. The second motor receives power from the three-phase current network through the rotor rings. With this implementation of the electrical circuit in the stator

the second motor is induced by an electromotive force with a frequency

60

where iij is the asynchronous rotation speed of the first engine, p. is the rotation number of the magnetic field of the second engine, p is the number of pole pairs. The stator winding of the second motor, turned on by a star with zero drawn out, must be designed for the passage of welding current.

The direct current generator with its negative pole is driven to the zero wire of the high-frequency current generators, and the positive to the welding table 8.

A high-frequency generator in series with a self-induction coil G is connected to a DC source.

At the time of welding, the generator of increased frequency will play the role of a compensator, which increases the total cos. The constant pulsating current makes it possible to reduce the arc ignition voltage (the welding arc will ignite the pulsating current).

As for the generator operation at idling, in this case it is necessary to synchronize the asynchronous motors, the rotating generators of direct current and increased frequency, for which the current of the welding generator of direct current is used.

The subject matter of the invention.

Claims (2)

1. An assembly for multi-stage welding consisting of a high-frequency generator, whose current to create a pulsating welding current with an increased arc ignition voltage is imposed on the current of a normal DC generator, characterized in that, in order to use an increased frequency generator, compensator to increase the cos ® network, an asynchronous machine was used as a high-frequency generator, the rotor of which is powered through the rings from the three-phase current network dit svarochiy current generator d.c.. 2. Use in the unit according to claim 1 of a welding direct current generator for synchronizing asynchronous motors, rotating direct current generators and increased frequency.