SU634254A2 - Power supply source - Google Patents

Description

I

The invention relates to the field of electrical engineering and is intended to power a portable radio equipment.

According to the main author. St. jNs 492868 a power source is known that contains a battery pack, a voltage converter, a voltage stabilizer with a series regulating transistor and a supporting element powered by a voltage regulator and a rectified voltage with an additional winding of the converter, and a starting capacitor connected in parallel with a switch the supporting element and the battery pack.

However, this power source does not provide for cyclical operation of aiiiaature, which is especially important for self-powered devices that control slowly varying processes.

To ensure the required device operation time, it is necessary to install a battery pack of a certain capacity, and the dimensions and weight of the power source may be unacceptable for portable equipment. The cyclic mode of operation of the power source and the equipment as a whole significantly increases the device operation time, as compared with continuous mode with the same battery pack capacity, which significantly reduces the size and weight of the device.

The aim of the invention is to improve the weight-dimensional characteristics by ensuring the cyclic mode of operation of the nigan source.

This is achieved by the fact that the proposed power supply is equipped with three transistor switches and a time relay connected in parallel with the battery pack. moreover, the transistor of the first key transition collector-emitter is connected napa.elno to the supporting element. After that, optically connected collector-emitter transitions of transistors of different types of conductivity of the second and third keys are connected between the base of the regulating transistor and the battery pack terminal connected through a switch to the input power terminal of the regulating transistor, and the bases of the transistors of all keys are connected to the time relay outputs .

The circuit diagram of the proposed power supply is shown in the drawing.

The power source contains a block of batteries 1, a switch 2, a time relay 3, transistor switches 4, 5, 6, a starting capacitor 7, a reg / deflection transistor 8, a support element at the zener diode 9, a ballast resistor 10, an electrolytic filter capacitor 1, diode 12 and voltage converter 13.

Time relay 3, the supply voltage of which is stabilized by a parametric stabilizer (resistor 14, Zener diode 15), is assembled on transistors 16, 17, resistors 18-21, and electrolytic capacitor 22. Switch 23 blocks the time relay. Voltage converter 13 is assembled in a push-pull circuit on triodes 24, 25 and contains a voltage transformer 26 with an additional winding 27, resistors 28, 29 splitter divider, diodes 30, 31, and a resonant circuit with a resistor 32 and a capacitor 33, which stabilizes the frequency of the converter.

The power source works as follows.

In B1) 1 of the switched on state, the starting electrolytic capacitor 7 is connected via switch 2 to the battery unit and is charged to its EMF. When the power source is turned on, the voltage is supplied to time relay 3. The time relay is based on the charge de-discharge of capacitor 22. When voltage is applied, capacitor 22 is charged along the circuit "plus battery pack, emitter-collector junction of transistor 16, resistor 20 providing the intrinsic safety of the capacitor 22, the base-collector transition of transistor 17, resistor 19, "minus the parametric stabilizer, while the transistor 16 is held open by the collector current of transistor 17. Transistor switches 4, 6 C aperts, and the key 5 is open and connects the starting capacitor 7 to the base of the regulating transistor 8, ensuring the start of the voltage converter 13. The voltage from the additional winding 27 of the converter 13 is rectified by a diode 12, filtered by the capacitor 11 and in combination with the output voltage of the compensation voltage: for powering the Zener diode 9. With arg the voltage of the power supply of the supporting element is practically independent of the measurement of the voltage on the accumulator block of mountains I and remains constant during the whole cycle of the discharge of it. The capacitor charge duration determines the on-time state of the power supply in cyclic operation. As the capacitor charges 22, the current flowing through

the transistor 17 becomes insufficient to hold the transistor 16 open, and it is locked. The transistor switch 5 is locked and disconnects the starting capacitor 7 from the base of the regulating

the transistor 8, the switch on the transistor 4 connects the capacitor 22 to charge to the battery pack 1, and the switch on the transistor 6 short-circuits the reference diode 9 and locks the control transistor 8. The circuit turns off, the discharge of the capacitor 22 starts.

on the circuit “minus the parametric stabilizer, resistors 18, 20, 21,” plus the battery pack. Resistor 21 practically determines the pause time.

The parametric stabilizer on the resistor 14, the zener diode 15 ensures the stability of the time relay shutter speeds. When switching on the switch, the time switch is blocked, and the power source goes into continuous operation.

Claims (1)

Invention Formula Power source on the bus. St. No. 492868, characterized in that. what, with a goal; improving the weight-dimensional characteristics by providing cyclic operation, it is equipped with three transistor switches and a time relay connected in parallel to the battery pack, the first key transistor passing the collector emitter connected in parallel to the supporting element, series-connected transitions of the collector-emitter transistors once the conduction type of the second and third The L1 pins are connected between the base by adjusting its transistor and the clip of the battery pack, which is connected via a switch to the input y.m silovy.m terminal regulator transistor, and the base of the transistors of all the keys are connected to the outputs of the time switch.