SU375692A1 - MULTI-PHASE PIK-TRANSFORMER FOR REGULATING THE IGNITION ANGLE OF ION DEVICES - Google Patents

Description

one

The invention can be used in multiphase ac rectification circuits, for controlling the amount of rectified voltage, and also for automatically changing the ignition angle of ion devices.

The known devices are complex, as the ignition angle of ion devices is controlled by phase shifters and single-phase peak-transformers, i.e. several devices.

The proposed device allows the phase of the spike emf to be changed. secondary windings with respect to network voltage with the help of one device.

This is achieved by the fact that the core of the multi-phase secondary system is rotatable inside the bore of the stator (primary system) and can be braked in any angular position relative to the stator.

The drawing shows a diagram of a multi-phase peak transformer.

It contains a stator / three-phase winding, creating a two-pole rotating magnetic field; a braked rotor 2 assembled from sheets of dynamo steel, with an nm number of plug-in teeth, assembled from sheets whose material has a greater magnetic permeability (for example, from permallo); drive 3 for turning the rotor.

A separate winding of W turns is laid on each permallo teeth. Total rotor has n such windings.

Dynamic steel teeth 4 perform the role of magnetic shunt in relation to permalloy teeth 5 (n can be equal to 3, b, 1.2, etc.).

Due to the rapid saturation of the teeth, the curve of the change in the magnetic flux Φ passing through each of them has the shape of a trapezoidal curve, and the curve of the emf.

, "

e - induced in each winding,

Grasping the teeth 5, as a result - a pike shape.

Since the device has the nth number of secondary windings, the axes of which are shifted along

271

then from these

the circumference of the rotor at an angle T

windings, you can get the nth number of peaked EMF, shifted in phase by angle

360

. By rotating the rotor relative to the stator (automatically or manually), you can change the phase of the peak-like emf. secondary windings relative to the phase of the se1I voltage.

The manufacture of a rotor with false teeth from permallo causes some technological difficulties, therefore, for a multiphase peak transformer, a composite rotor is proposed.

The rotor of a multiphase peak transformer can also be made from dynamo steel sheets without permallo. However, in this case, to obtain well-pronounced peaks of emf. a strong saturation of the rotor teeth is required, which leads to an increase in the equivalent air gap and, therefore, an increase in the stator current.

four

Subject invention

A multi-phase peak-transformer for adjusting the ignition angle of ion devices, but made to a non-contact type AC fixed-core induction machine for a multi-coil secondary system, characterized in that in order to change the phase of the pick-up emf

secondary windings relative to the mains voltage, the core of the multi-phase secondary system is made rotatable inside the bore of the stator (primary system) and can be braked in any angular position relative to the stator.

U

Sch, ..