SU522011A1

SU522011A1 - Synchronous generator with excitation from higher harmonics floor

Info

Publication number: SU522011A1
Application number: SU1999823A
Authority: SU
Inventors: Сурен Хачикович Оганесян; Гамлет Велиханович Ервандян
Original assignee: Предприятие П/Я Г-4709
Priority date: 1974-02-11
Filing date: 1974-02-11
Publication date: 1976-07-25

Description

1one

Изобретение относитст к источникам питани дл сварки, в частности к сварочным генераторам.The invention relates to power sources for welding, in particular to welding generators.

Известен синхронный генератор с возбуждением от высших I гармоник пол , содержаший основную корную обмотку и дополнительную обмотку, питающую обмотку Еюзбуждени через вы мите.ь.A synchronous generator with excitation from the higher I harmonics of the field is known, which contains the main main winding and an additional winding that feeds the excitation winding through you.

Предложенное устройство отличаетс от известного тем, что параллельно обмотке возбуждени подключена основна корна рбмотк через введенный в схему вьшр митель ..The proposed device differs from the known fact that in parallel to the excitation winding the main root of the main winding is connected through an expander entered into the circuit.

Это позвол ет стабилизировав .процесс сварки и улучшить ее качеса-сю.This makes it possible to stabilize the welding process and improve its quality.

На чертеже изображена схема возбуждени синхрош1ых сварочных генераторов, где 1 - основна обмотка, т.е, обмотка по первой гармонике пол , 2 и 3 - выпр мительлые мосты, 4 - сопротивление, 5 - дополнительна обмотка, т.е. обмотка по третьей гармонвпке пол , 6 - выпр мительный мост, 7 - реостат, 8 - обмотка возбуждени , 9 электрод, 1О - свариваема деталь.The drawing shows the excitation circuit of synchronous welding generators, where 1 is the main winding, i.e., the first harmonic winding is floor, 2 and 3 are rectifier bridges, 4 is resistance, 5 is additional winding, i.e. winding on the third harmonic floor, 6 - rectifying bridge, 7 - rheostat, 8 - excitation winding, 9 electrode, 1O - welded part.

ilpn холостом ходе ток возбуждени поступает от основной обмотки 1 через выпр мительныЙ мост 3 и сопротивление 4, При коротком замыкании (начало сварочного процесса ) напр жение основной обмотки 1 равно нулю, а напр жение дополнительной обмотки 5 - максимуму, поэтому ток в режиме начало сварки (когда электрод 9 прикасаетс к детали 10) в обмотку возбуждени поступает через дополнительную обмотку 5, выпр мительный мост6 и реостат 7.ilpn idle current, the excitation current comes from the main winding 1 through the rectifying bridge 3 and resistance 4. During a short circuit (the beginning of the welding process) the voltage of the main winding 1 is zero and the additional voltage of the winding 5 is maximum, therefore the current in the start welding mode (when the electrode 9 touches the part 10) enters the field winding through an additional winding 5, a rectifying bridge 6 and a rheostat 7.

В процессе сварки ток в обмотку возбуждений 8 поступает от основной 1 и дополнительной 5 обмоток, которые подключены параллельно. В сварочном генераторе по данной схеме достигаетс минимальное значение напр жени дополнительной обмотки при холостом ходе генератора и максимальное значение напр жени дополнительной обмотки при коротком замькании основной обмотки .In the process of welding, the current in the excitation winding 8 comes from the main 1 and additional 5 windings, which are connected in parallel. In the welding generator, according to this scheme, the minimum value of the voltage of the additional winding is reached when the generator is idling and the maximum value of the voltage of the additional winding during a short circuit of the main winding.

Claims

The circuit allows adjusting the welding mode excitation current with the aid of a rheostat 7, while leaving the idling excitation current unchanged for any saturation of the magnetic system of the generator 1, since there is no dependence of the excitation current of the short circuit and the nominal 1H stroke. The circuit operates more efficiently with a minimum value of the emf, additional winding when the machine is idling, which is achieved within the optimum geometry of the machine. The no-load voltage stability of the welding generator is achieved by parallel connection of the main 1 and additional. 5 windings to winding in excitation through rectifying bridges 3 and 6, respectively. In this case, the optimal geometry is not observable, several circuits operate at any saturation values of the magnetic system of the generator, ensuring a good level of the welding mode. In the proposed scheme, the use of copper is minimal, since the no-load excitation current is provided for the main process when relative content. The first harmonics in the magnetic field of reeepfiTopa are large, i.e. the energy consumed by the excitation winding, compared with the energy transmitted by the generator, is small and there is no need to increase the volume of copper of the main winding. A prototype was manufactured and tested in a welding generator that tested its feasibility and efficiency. TexBtraecEtiii the effect of the suggestion is that the dimensions of the generator are reduced, since the generator is designed with normal saturation of the pipeline (the size of the inductor is within the limits of the norm); ppoyshit saving copper in additional; winding (approximately 1.5 times); decreases the value of the shock short circuit current. Claims of synchronous generator with excitation from higher harmonics of the field, mainly for welding, containing the main root winding and an additional winding feeding the excitation winding through a sniffer, characterized in that, in order to stabilize the process and increase its quality, parallel to the winding The main winding winding is connected via the rectifier introduced into the circuit.

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