SU1700613A1 - Device for magnetization and demagnetization - Google Patents

Abstract

The invention relates to electrical engineering and can be used to magnetize and demagnetize permanent magnets, such as parts and assemblies of electrical machines. The device contains a source of direct current 1, a battery of capacitors 7, a charge register 5, a charge button, magnetization 13, demagnetization 14, a pulse transformer 12, a magnetizing unit 2, a two-element switch 30, a controlled valve 4. the introduction of the button demagnetization 14 , a two-position switch 10 and an additional diode 8 and their interconnection with the elements of the device allows to expand the functionality of the device and simplify it. 1 silt

Description

The invention relates to electrical engineering and can be used for magnetization and demagnetization of permanent magnets, for example parts and components of electrical machines.

The purpose of the invention is the expansion of functionality and simplification of the device.

The drawing shows a diagram of the device.

The device consists of a direct current source 1, to which the winding of the magnetizing flea 2 is connected by means of a main switching diode 3. controlled valve 4, charging 1; resistor 5 and buttons Charge 6, a capacitor bank 7 connected to common points of the connection of the anode of the diode 8 and the cathode of the main switching diode 3 and, accordingly, the anode of the controlled valve 4, ?? the cathode of the auxiliary switching diode 9 and the charging resistor 5, the two-position switch 10 to which the diode 8 is connected, the main switching diode 3, the controlled valve 4, the auxiliary 2 'switching diode 9 and the winding of the magnetizing unit 2; communication diodes 11 connected to a control electrode of a controlled valve 4, to a pulse transformer 12, buttons “Magnetization” 13 and Magnetization 14, as well as a limiting resistor 15.

The device operates as follows.

In magnetization mode, the switch 10 switches to the position of the AC-Sun. When the button ZA is short-circuited, row S (Fig. 1), the process of charging the capacitor bank 7 begins, with the end of its button the charge 6 opens. When the 4 “Magnetization” button 13 is closed by means of a pulse transformer 12 • a single voltage pulse of positive polarity is generated, which is activated by means of the corresponding 4 diodes' And control valve 4, due to which the charge voltage of the battery of capacitors 7 is applied to the winding of the magnetizing unit 2 and is carried out the energy discharge of the capacitor bank 3 7, as a result of which the magnetization process is carried out.

At the same time, the process of self-induction is carried out. In this case, the self-induction EMF is applied to the battery of co-capacitors 5 with reverse polarity and, at a certain point in time, the overcharge voltage reaches its maximum value. From this moment, the recharge voltage is applied to the winding of the magnetizing unit 2 with the initial polarity in the chain; diode 8 is an auxiliary switching diode 9. In this case, the recharge voltage decreases to zero, the discharge current increases from zero to maximum and then decreases to zero. The cycle is completed and can be repeated by pressing the Charge * b button.

Thus, · in the time interval in which the emission of the negative half-wave of the magnetizing current is usually observed, which influences as the demagnetizing factor, it is neutralized.

in demagnetization mode, the switch • 0 switches to st-ae position.

Short-circuiting the button Charge ”b (FIG. A) charges the bar and capacitors 7, at the end of which the button Charge δ · closes. When closing '<button pip' '' Demagnetization ”14, the voltage of positive polarity lasting several seconds, due to the closing time of button 14, unlocks controlled valve 4 using the corresponding 5 communication diode 11, due to which the process of damped current oscillations due to the presence of the LC circuit through the winding of the magnetizing unit 2 in chains: (positive half-cycle) capacitor bank 7, controlled valve 4, the beginning of the winding, the end of the winding, the main switching diode 3, capacitor bank; (negative half-cycle) capacitor bank 7, diode 8. winding end, winding start, auxiliary switching diode 9, capacitor bank 7, etc. until the demagnetizing current is completely attenuated. The complete demagnetization of a magnetized permanent magnet is carried out.

Thus, the introduction of the button Demagnetization of the diode and the on-off switch in conjunction with the elements of the device contributes to the expansion of functionality in terms of the demagnetization process and simplification of the device as a whole.

Claims (1)

0 claims A device for magnetizing and demagnetizing, containing a DC source connected in series, a Charge button, a charging resistor, a controlled valve, a magnetizing unit, a main switching diode, and an auxiliary switching diode, a capacitor bank connected in series with each other and parallel to the power source , crop limit, Magnetization button, primary winding of a pulse transformer, communication diodes, secondary winding of a pulse transformer at one end inena through the first diode of communication with the control electrode 5 of the controlled valve, the second end - with a common connection point of the cathode of the main switching diode and the capacitor bank, the second output of the capacitor bank is connected to the common connection point of the anode of the controlled valve and the cathode of the auxiliary switching diode, characterized in that , in order to expand the functionality and simplify the device, the button Demagnetization, an additional diode, a two-position switch, with one output button Once magnetization is connected to the common connection point of the Magnetization button and the limiting resistor, the second terminal is connected to the anode of the second communication diode, the cathode of which is connected to the common connection point of the cathode of the first communication diode and the control electrode of the controlled valve, the additional diode is connected by the anode to the cathode of the main switching diode, and cathode - with the first terminal of the on / off switch, the second terminal of which is connected to the anode of the auxiliary switching diode, the third terminal is connected to a common connection point atoda regulation valve and one of the terminals of the magnetizing unit, the fourth terminal - to a common point connecting the second output of the magnetizing unit and the main anode of the switching diode. Compiled by A. Lukin Editor I. Lazorenko Tehred M. Morgenthal Corrector M. Demchik Order 4471 Circulation Subscription VN (4 IPI of the State Committee for Inventions and Discoveries under the USSR State Committee for Science and Technology 113035, Moscow, Zh-35, Raushskaya nab., 4/5 Production and Publishing Plant Patent, Uzhhorod, 101 Gagarin St.