SU1758681A1 - Device for magnetization and demagnetization - Google Patents

Abstract

Use: technology of creating magnetic fields, magnetization and demagnetization of permanent magnets, such as parts and assemblies of electrical machines. SUMMARY OF THE INVENTION: The device comprises a DC source, a magnetizing unit, a control valve, a capacitor bank, a switch, a charge button, a charging resistor, a limiting resistor, a switching diode. The device is additionally equipped with a Start button, and the magnetizing unit is made in two sections. The start button is connected at one end to the connection point of the positive bus of the DC source and the charge button, and the other end to the control electrode of the controlled valve by means of a limiting resistor. 3 il. (Ls

Description

The invention relates to a technique of creating magnetic fields and can be used to magnetize and demagnetize permanent magnets, such as parts and assemblies of electrical machines.

A device for pulsed magnetization of permanent magnets is known, comprising a direct current source, a capacitor battery, a charging resistor, a charge button, a discharge button, a limiting resistor, a switching start transformer, communication diodes, a threshold valve, a switching feedback transformer, controlled valve, thyristor, magnetizing unit, main switching diode and auxiliary switching diode.

The drawback of the device is the impossibility of carrying out the degaussing process.

A device for magnetization and demagnetization, taken as a prototype, containing sources of direct current, magnetizing unit, main switching diode, controlled gate, charging resistor, Charging button, capacitor bank, diode, auxiliary switching diode, two-position switch, is also known. , communication diodes, a pulse transformer, a magnetize button, a demagnetize button and a limiting resistor.

The drawback of the device is the complexity of the circuit, the high saturation of the components, which significantly affects its reliability and efficiency, as well as the inability to increase the magnetization efficiency due to its inherent functionality.

The goal is achieved by those. that the device is magnetizing and demagnetizing

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(iv. containing a constant current source. magnetizing unit, control valve, capacitor bank, switch, charge button, charging resistor, limiting resistor, and switching diode whose cathode is connected to the common connection point of the anode of the controlled valve, charging resistor and capacitor banks, which, in turn, are connected to the positive DC power line via the Charging button, the magnetizing unit — to the cathode of the controlled valve and the switch terminal — is equipped with a Start button, and the magnetizing unit is made in two sections, the beginning of the first section is connected to the common connection point of the cathode of the controlled valve and to the mode terminal; Triggering the switch, the end to the common connection point of the DC bus source and the terminal; Magnetization switch, the second section - to the anode of the switching diode and the second terminal of the Demagnetize mode, the switch, beginning - to the second terminal of the Magnetization switch mode, with the Start button connected at one end to the positive bus using regular enrollment D.C. and The charge button, and the other - to the control electrode of the controllable valve means limiting resistor.

 FIG. 1 shows the electrical circuit of the proposed device; in fig. 2: a) current graph in the magnetization mode; b) - a plot of current damped oscillations in the Demagnetize mode.

The device consists of a direct current source 1, to which a two-section magnetizing unit 2 is connected by means of a controlled valve 3, a switching diode 4, a switch 5, a charging resistor 6 and a button 7 Charge, capacitor batteries 8 connected to a source 1 direct current by means of a charging resistor dm button 7 Charge, limiting resistor 9 and button 10 Start, connected in series to the positive bus of source 1 of direct current and to the control electrode of the controlled valve 3.

The device works as follows.

1. Mode Magnetization. Switch 5 is set to Magnetization. In the case of a short circuit, the button 7 Charge, the battery of capacitors 8 is charged to the value of the voltage of the DC source 1. WITH

this moment, the device is ready to perform the process of magnetization

When the button 10 is closed, the start-up of the controlled electrode of the controlled valve 3 is applied by means of the limiting resistor 9 to a constant positive polarity, as a result of which the controlled valve 3 is supported and

the decaying oscillatory process starts (Fig. 2a): The first main positive polarity of the half-wave (magnetizing) of the maximum amplitude of the current In is created by the oscillating circuit C

consisting of a battery of capacitors 8 and the primary winding of the two-part magnetizing unit 2. the switching control valve 3. This creates a negative factor, i.e. demagnetizing half-wave (the first negative half-wave), which is compensated (neutralized) by the second half-wave positive polarity created by the recharge of the capacitor battery 8 along

chain: 5 Magnetisation jumper switch corresponding to the polarity of the secondary winding incorporating the two-part magnetizing unit 2, a switching diode 4. A second negative half-wave is compensated similarly to the first third positive polarity half-wave generated by another current battery recharging capacitor 8, and so on, is complete poke- damped oscillatory process. Thus, the Magnetization mode creates a magnetizing pulsed current of positive polarity of maximum amplitude n, while the negative half-wave emission neutralizes the second 1H, which, in turn, produces another negative negative half-wave neutralized by the next one (n, etc.), as a result of which the functional capabilities of the device in terms of increasing the magnetization level of permanent magnets due to neutralization of demagnetizing factors generated, in turn, compensating the field wave, etc. until completion oscillation process, thus completely eliminated partial demagnetization i.e. the magnetization level due only to the current value of the first half-1H.

2. Mode Degaussing. Switch 5 is set to the Degauss position. When the button 7 is momentarily closed, the battery charge capacitors 8 are charged to a value of

The DC power source 1 and the device is ready to perform the demagnetization process

When the button 10 is closed. The start-up of the controlled electrode of the controlled valve 3 is applied by means of the limiting resistor 9 to a constant positive polarity, as a result of which the controlled valve 3 is unlocked and the process of damped oscillations proceeds due to the presence of the LC circuit along the chain - positive half-period: battery of capacitors 8, controlled valve 3, primary winding of a two-section magnetizing unit 2. connected by a corresponding polarity, battery of capacitors 8; negative half-period: battery of capacitors 8, terminals of switch 5 in Demagnetization mode, secondary winding of two-section magnetizing unit 2, connected with appropriate polarity, controlled valve 4, capacitor bank 8, etc. until the demagnetizing current is completely attenuated, as a result of which the magnetized permanent magnet is fully demagnetized

Thus, the introduction of the Start button into the device and the execution of the magnetizing unit by a two-section device in conjunction with the elements of the device help to simplify the device and improve its functionality.

Claims (1)

Claims of Invention Magnetization Device and p-TZ Magnetization. containing a source of direct current, a magnetizing unit, control valve, capacitor battery, Start button, S button, charging resistor, limiting resistor and switching diode, the cathode of which is connected to the anode of the controlled valve and capacitor batteries connected to the charging resistor and the Charger button to the positive bus DC source and a free output - to the minus bus of the same source, the beginning of the first section of the magnetizing unit is connected to the cathode of the controlled valve and the first terminal of the Degaussing switch mode, I distinguish This is because, in order to simplify the device and improve its functionality, the magnetizing unit is made in two sections, the end of the first section of which is connected to the common connection point of the minus source bus direct current and the first terminal of the mode Magnetization of the switch, the second section is connected to the anode of the switching diode and the second terminal of the mode Demagnetizing the switch, the current is broken to the second terminal of the Mode Magnetizing the switch, the Start button is connected to the connection point of the positive source bus DC and the button Charge, and the other 5 to the control electrode of the controlled valve through the limiting resistor. 1 Woo Woo L FIG. 2