SU584407A1 - Dc voltage multiplier - Google Patents

Description

one

The invention relates to secondary power sources that convert the constant voltage of one nominal voltage to a constant voltage of another nominal value several times higher than the voltage of the primary power source.

A device for multiplying a constant voltage, comprising a booster device, consisting of keys on transistors, switched and storage capacitors, and decoupling diodes 1, is known. A disadvantage of this device is its complexity, especially with a large multiplication factor, since it is necessary A circuit to add transistors, capacitors, and diodes to each step of the multiplication.

Also known is a DC voltage multiplier containing a relay, the winding of which is connected between the input terminals via a normally closed contact, switched and storage capacitors 2.

To simplify, the proposed DC voltage supply is equipped with a chain of two according to connected diodes connected between the unipolar 1 input and output pins, and a switched capacitor is connected between the common connection point of the relay coil and the normally closed contact and the common connection point of the diodes of the chain.

The drawing is a diagram of the described multiplier.

A relay 1 winding is connected between the positive pole of source 2 and one plate of capacitor 3. Through a normally closed contact, the common connection point between the windings of relay 1 and capacitor 3 is connected to the negative pole of source 2.

Diodes 4 and 5 provide power isolation and are connected in series and in the forward direction between the positive power of source 2 and the output terminal of the multiplier. A switched capacitor 3 is connected to the midpoint of the diode circuit 4 and 5. In parallel to the output terminals of the multiplier, a storage capacitor 6 is connected.

When power is supplied to the multiplier by the source 2, the charge current of the capacitor 3 and the current through the relay coil 1 flow through a normally closed contact.

The capacitor 3 is quickly charged through diode 4, and the capacitor 6 through diodes 4 and 5 to the voltage of the power source.

The current flowing through the winding reaches a relay actuation value at some point in time, and the normally closed contact breaks the charging circuit of the capacitor 3 and the power supply to the winding of the relay 1. When the connection point of the relay winding 1 and capacitor 3 is disconnected from the common bus, of these elements in

which causes a voltage resonance, and since the circuit at this moment is connected in series to source 2, the capacitor b is charged with this high voltage, which exceeds the voltage of source 2 several times. The magnitude of this voltage depends on the quality factor of the series circuit formed by the winding of the relay 1 and the capacitor 3.

After a certain period of time, the relay releases and the normally closed contact again connects the common bus to the connection point of the capacitor 3 and the winding of the relay 1, after which the energy is again stored in the circuit and then returned to the capacitor 6.

Capacitor 6 is a cumulative element. Diode 5 prevents the capacitor 6 from discharging at the moment when the normally closed contact connects the common bus to the connection point between the windings of the relay 1 and the capacitor 3.

Claims (2)

1. USSR author's certificate No. 221073, cl. H 02 M 3/10, 1968. 2. USSR author's certificate №151391, cl. And 02M 3/06, 1962. + 0 -0 + V