SU453748A1 - SWITCHING DEVICE q! 'Oi' ';' Tj g • "; ' Phpp yii ^ iii-j sfc * i ' - Google Patents

Description

one

The invention relates to electrical and radio engineering and can be used as a switch for switching low-voltage and low-current circuits. Known switching devices containing an electrodynamic vibrator, moving and stationary block contacts, main contacts and a spring.

For automatic adjustment of the contact pressure during operation ;: The proposed device contains an electronic switch, amplifier, rectifier, adder, vibration measurement sensor and direct current source. The vibration measurement sensor and the DC source are connected to the inputs of the adder, the output of which is through fixed and movable contacts, the amplifier and rectifier are connected to the electrodynamic vibrator coil, and the output of the DC source is connected between the AC source and a vibrator coil.

Fixed block contacts are smaller in width than the main contacts.

The drawing is a diagram of the described device.

A vibration measurement sensor 1, for example, inductive or piezoelectric, and

source 2 direct current connected to the inputs of the adder 3, which, in turn, through the block contacts 4 of the stator, the movable block contacts 5, the amplifier 6 constant

current and rectifier 7 is connected to the coil 8 of an electrodynamic vibrator. In addition, to the coil 8 through the electronic key 9 and the separation capacitor 10 is connected to the generator 11 of the alternating current. At the same time, the output of the source 2 is connected to the second input of the electronic key 9. The permanent magnet 12 and the insulating sleeve 13 with movable block contacts 5 fixed on it and the main contacts 14 pressed under

the action of the spring 15 to the contacts 4 and 16 are located on the axis 17 of the switch. In the initial state, the spring 15 balances the moving system of the switch (coil 8 and sleeve 13 with contacts 5 and 14)

and creates an initial contact pressure in a de-energized state. The coil 8 is located in the annular gap of the permanent magnet 12 and together with it forms an electrodynamic vibrator. 8 spool crepe

to the insulating sleeve 13 with the help of the locking screw 18. The stator cage has three lugs 19, which are included in the three longitudinal grooves of the coil, due to which only the reciprocating movement of the coil is provided during operation of the device.

When the instrument is turned on, the DC source 2 and the alternator 11 are turned on. In this case, the direct current from the source 2 through the adder 3, the fixed 4 and the movable 5 block contacts, the amplifier 6 and the rectifier 7 enters the vibrator coil 8. The fixed block contacts 4 press the movable block contacts 5, and due to the interaction of the changing - (increasing) in the initial period of the magnetic constant current of the coil 8 with the constant field of the magnet 12 simultaneously the movable contacts 14 are pressed to the contacts 16.

The current in the coil 8 from the generator 11 of the alternating current is not received, since the electronic key 9 is locked by a low signal from the source 2 of direct current. When the axis 17 of the switch is rotated from one position to another, the pins 4 and 5 are opened and direct current is not supplied to the vibrator 8 by the source 2 starting to operate in idle mode. Therefore, from the input of the source 2 to the input of the electronic key 9, a high level signal is received, which opens the key, and alternating current is fed to the coil 8 from the generator 11. During switching from one position to another due to the supply of alternating current to the coil 8 and interaction of an alternating magnetic field the coils with the magnetic field of the magnet 12 along the axis 17 of the switch, oscillations of the coil and the associated contacts 5 and the main contacts 14 with the frequency of the alternating current occur, i.e., the contact pressure periodically decreases. The oscillations continue until the movable contact blocks 5 are closed with the fixed contacts 4. In this case, the circuit from the generator 11 is interrupted (the electronic key 9 is locked) and only direct current flows into the coil. As a result, the blocking pins 4 and 5 and the main pins 14 and 16 are pressed down to provide optimal contact pressure.

To enable the automatic regulation of contact pressure under vibration loads, use a vibration measurement sensor, which creates a variable voltage proportional to vibration loads and fed to the input of the adder 3. The signals from the sensor 1 and the source 2 are summed in the adder 3, and the increased signal from the output of the adder through the block contacts 4 and 5, the amplifier 6 and the rectifier 7, the body 7 enters the vibrator tap 8.

Thus, the pins 4 and 5 commute low-voltage and low-voltage signals from the DC source and the vibration measurement sensor, which are then amplified in the DC amplifier 6, and the variable component of the signal from the vibration measurement sensor rectifies

5 with a rectifier 7. In this case, an automatic additional clamping of the block contacts 4 and 5, as well as the main contacts 14 and 16, is provided, compensating for the effect of vibration loads on the moving channels 5 and 14 due to the interaction of the increased DC magnetic field with the magnetic field of the magnet i.e. automatic adjustment of the contact pressure is carried out.

Subject invention

Claims (2)

1. A switching device containing an electrodynamic vibrator, moving and 0 stationary block contacts, main contacts and a spring, characterized in that, in order to automatically control the contact pressure during operation, it contains an electronic switch, amplifier, rectifier, adder, vibration measurement sensor and DC source, and the measurement sensor vibrations and a source of direct current are connected to the inputs of the adder, the output of which is through fixed p 0 moving auxiliary contacts, an amplifier and a rectifier are connected to an electrodynamic vibrator coil, and the output of a direct current source is connected to the input of an electronic switch connected between an alternating current source and the vibrator coil. 2. The device according to claim 1, characterized in that the fixed block contacts are made smaller in width than the main contacts. 14 J6 72