SU961076A1 - Ac to dc voltage converter - Google Patents

Description

The invention relates to electrical engineering and can be used for rectifying alternating voltages.

Electromagnetic devices based on magnetically controlled sealed contacts — reed switches 1 are known.

In these devices, the reed switch is installed directly on the busbar and the magnetic field formed by the flowing current crosses the magnetic system of the reed switch, causing, with a certain induction, its operation.

The closest to the proposed is an electromagnetic rectifier of alternating current containing a glass capsule with sunken contacts of a corresponding number, in the airless space of which iron sawdust is placed, closing the corresponding contacts when moving sawdust under the influence of external electromagnetic fields generated in correspondingly arranged solenoids with a constant current from a constant current source Gz.

A disadvantage of the known device is its low reliability and efficiency due to

the presence of a source of direct current s in the form of batteries and ferropowder, closing the contacts.

The aim of the invention is to improve the reliability and efficiency.

The goal is achieved by the fact that in an alternating voltage converter into a constant, containing a cylinder with mag10 nitro-controlled sealed contacts, an alternating current winding and a source of a constant magnetic field, the latter is used as a permanent magnet

15 is parallel to an alternating current winding that encloses a can with magnetically controlled sealed contacts.

20

In drawing P1, a device structure is introduced that implements one full-wave rectification of the input voltage.

Converter contains cylinder

25 with magnetically operated sealed contacts 1 with terminals 2 and 3, which are covered by the control winding 4. Parallel to the control winding is a permanent magnet 5. From

30, terminal 2 is connected load 6. The principle of the device is as follows. An alternating voltage of the same frequency as the voltage Upy is applied to the winding 4 of the control. Under the action of this voltage, in the contact zone 1, the winding 4 creates a sinusoidal magnetic field with induction B. At the same time, in the contact zone, the magnetic field from a constant, magnet 5 with induction B /. Thanks to this, the total magnetic field affects the contacts 1, the induction curve of which is elevated above the abscissa axis to the magnitude of the inductionB of the permanent magnet 5. At the same time, the magnitude of the induction B of the permanent magnet 5 is chosen to be equal to contacts. In accordance with this, the contacts WILL be closed for a half-period - the voltage applied to the winding, 4; Since the frequency of the voltage on the control winding 4 is chosen to be equal to the frequency of the voltage UB, the voltage on the load will have the curve shown in FIG. 1 under load 6. If the poles of the magnet are swapped with shafts, the polarity of the rectified voltage UH is reversed as in this case the total field induction curve will be omitted

Claims (2)

about the abscissa axis by the magnitude. (not shown. The latter circumstance brings about an additional important advantage, since it allows the polarity of the rectified voltage on the load to change without contact. Thus, with the help of a reed switch, a one-sided alternating load Claims of the Inverter AC Voltage Converter Containing a cylinder with magnetically controlled sealed contacts, an alternating current winding and a source of a constant magnetic field characterized in that, in order to increase reliability and efficiency, a permanent magnet is used as a source of a constant magnetic field, which is located parallel to an alternating current winding encompassing a cylinder with magnetically controlled sealed contacts. 1. Semiconductor Rectifiers. Edited by F.I. Kovalev, M., Energie, 1978, pp. 350-352. 2. Patent of the USSR No. 5563, cl. H 02 M 7/32, 1925.