SU1251048A1 - Extremal power regulator - Google Patents

Abstract

The invention relates to the field of secondary power sources. The aim of the invention is to simplify the extreme power control. The goal is achieved by the fact that the information converter 11 is implemented in the form of a differentiation unit 12 with an output filter 13, and the Hall sensor 9 is inserted into the power sensor 8. The output of Hall sensor 9, proportional to the voltage of source 1, is transmitted to block 12 at times when key 10 is open. This key is controlled by the voltage from winding 15 throttles 3. At the output of block 12, a sequence of pulses appears and 13 - negative constant component, the impact of which is aimed at reducing the time interval of the closed state of the keys. At the same time, in the regulator without long search movements of the regulator, the mode of operation is established at which the output power consumed from the source is maximum. 3 nl with S (L N5 SP 00

Description

one

The invention relates to electrical engineering, in particular, to direct current power supply systems, and can be used to create autonomous power supply systems in which the primary direct current sources of limited current are not connected to the load terminals, including the terminals. batteries through pulse current regulators.

The purpose of the invention is to simplify the extreme power controller.

FIG. 1 shows a circuit diagram of an extreme power source power regulator; FIGS. 2 and 3 are diagrams explaining his work.

The extreme power controller is connected between input 1 and output 2 outputs and contains a power choke 3 with a main winding 4, a power switches block 5, a reverse diode block b, a control block 7 (for example, a pulse width modulator) a power sensor 8 consisting of a Hall sensor 9 and an electronic key 10; an information converter 11 in the form of a differentiation unit 12 with an output filter 13. The electronic key 10 comprises in the control circuits a pulse shaper 14 and an additional winding 15 of power throttle 3.

The Hall sensor 9 is placed in the non-magnetic gap of the throttles 3 and through the electronic key 10 is cascaded to the differentiation unit 12 and the filter 13, the output of which is connected to the control unit 7. The control electrodes of the Hall sensor 9 are connected via resistor I6 to the input terminals. The pulse shaper 14 is connected to the additional winding 15 by its input, and the output to the control circuits of the electronic switch 10.

The pulse shaper 14 can be configured, for example, in the form of a two-polar parametric stabilizer on Zener diodes 17 and 18, limiting resistors 19 and 20, Differential unit 12 is differentiated, for example, in the form of a differentiating cell on a capacitor 21 and resistors 22 and 23 ( with sufficient amplification properties of the block 7), and

510482

the filter is on the capacitor 24 and the choke 25.

The extreme power controller works as follows.

5 When the source is connected to the input outputs 1 and the load to the output terminals 2, the pulse-width modulator of the control unit 7 is started, which controls the control power unit 5 of the control keys 10. The periodic activation of the keys of this unit provides a pulse-width control of the current of the power source, and when the keys are closed

5, the power choke 3 with its main winding 4 is connected to the source and accumulates energy, and when they are opened, the main winding 4 plays the role of a volt-additional source for

20 by induced emf self-induction in it, which is added to the source voltage and, together with it, provides the load through the block 6 of reverse diodes. Thus, during one part of the period when the keys of unit 5 are closed, the current in the inductor 3 increases and the self-induction EMF is directed opposite to the source voltage, and in the other part of the period, vice versa

30 the current of the throttle is killed, and the EMF of its main winding has the same direction as the source voltage. In accordance with the ratio between the duration of the on and off states of the keys of the block 5, one or another average value of the source current is established.

35

A change in the current of the source connected to the input terminals 1, in the process of accumulation or expenditure of energy in the inductor 3, leads to a corresponding change in the source voltage due to an increase or decrease in the voltage drop across its internal resistance. At the same time, the output power of the source changes as a result of the change in its current and tension Since cyclical changes in current and voltage are associated with pulse-modulated regulation, the output power varies in a certain range. Depending on the duration of the on state of the keys of block 5 in the steady-state cyclic mode of operation, this range may occupy in relation to the extremum existing depending on

.3

power source P from its current

P

(fig2), different positions: to the left (range a - B), to the right (range e-f) or symmetrically (range c - cj-) ..

The searchless matching of the range of source power variation with its extreme value in the proposed controller is achieved due to the operation of the Hall sensor 9, the electronic key 10 and the differential unit 12, which controls the pulse width modulator of the control unit 7.

The output EMF of the Hall sensor 9 is directly proportional to the product of the magnitude of the magnetic flux in which the sensor is placed, by the amount of current flowing through its control electrodes. In the proposed controller, the magnetic flux in the gap of the core of the throttles 3, in which the Hall sensor 9 is placed, is directly proportional to the magnetomotive force generated by the source current flowing through the main winding of the throttles 3. The current flowing through the Hall 9 control (current) electrodes is proportional to the source voltage at the input terminals 1, Therefore, the output signal of the Hall 9 sensor is proportional to the product of the source current to its voltage, i.e. proportional to the instantaneous value of its output power. When the current source changes, the output signal of the Hall sensor 9 changes according to the law shown in FIG. 2.

The output signal of the Hall sensor 9 is transmitted to the differentiation unit 12 - only at those times when the electronic key 10 is opened, which is controlled by the variable EMF of the winding 15 throttles 3, Depending on the connection of the leads of this winding, the electronic key 10 closes its circuit or for the time closed states of keys of block 5, or for the time of their open state. In FIG. 1, the beginnings of the windings of the throttles 3 are indicated for the case when the electronic key 10 and the keys of the unit 5 are turned on and off simultaneously.

When these switches are closed, the current from the source increases, and when opened, it decreases. If during the time t of the closed state of these keys, the current increases from i to ij and by the time of their open state 510484

The NIN decreases from i to i, then stable oscillations of the output power are set in a certain range a B (FIG. 2), 5 Since, with closed keys, the derivative of power is positive, a sequence of positive pulses U 10 appears at the output of differentiation unit 12 duration t, and at the output of the filter 13 - a signal of positive polarity. This signal acts on the control input of the pulse-width modulator of control unit 7 in such a way as to increase the time of the closed state of the keys from t to t, at which the average value of the current from the source corresponds to the extreme value of its 2Q power. the current varies from i to i and vice versa. The power oscillates between the values c and d (Fig 2), and the output of block 12 appears signals symmetric about the time axis

(FIG. 35), which corresponds to the zero signal at the output of the filter 13 and the cessation of the change in the duration Hrf - of time intervals t,

If for some reason current oscillations occur between i and i (range e - f), then a sequence of pulses of opposite sign appears at the output of block 12, and a negative negative component at the output of filter 13, which is aimed at reducing the time interval of the closed state of the keys from t to t, at which the power from the reference value r0QpjHHKa fluctuates symmetrically with respect to the extreme value.

Thus, in the proposed extreme power controller, an operation mode is automatically set, in which the output power consumed from the source is maximum. To establish such a mode, no long search movements of the controller are required, it is enough to close the feedback loop and ensure the control by deviation In this case, it is enough to reduce to zero.

mean value of the derivative of the axis power.

In the proposed controller, the operation mode is achieved simultaneously.

0

CO significant simplification of its electrical circuit and design.

Pho. rmula of invention

An extreme power regulator containing a series-connected between the input and output pins of a power choke and a block of reverse diodes, the connection point of which is connected to the common bus through the power key block, the control input of the power key block is connected to the output of the power key block information converter output, power sensor with electronic key, output, connected to the information converter input, characterized in that, in order to simplify 1P1, information converter transformer Flax in the form of a differentiation unit with an output filter, a Hall sensor is inserted into the power sensor placed in a non-magnetic gap of a power throttle made with an additional winding, the control sensors of the Hall sensor are connected to the input terminals, the output of the Hall sensor is connected to the output of the power sensor via an electronic switch, and the control input of the electronic switch is connected through the input pulse shaper to the additional winding of the choke switches.

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6, LZ f-S -S I-S

FIG. 2

Editor E. Kopcha

Compiled by A. Kolokolkin Tehred E. Chkzhmar

Order 4410/44 Circulation 836 Subscription

VNISh State Committee of the USSR

for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5

. Production and printing company, Uzhgorod, Project 4

ftsg.Z

Corrector V "But ha

Claims (1)

Claim An extreme power regulator containing a power inductor and a block of reverse diodes connected in series between the input and output terminals, the connection point of which is connected to a common bus through the power switch block, the control input of the power switch block is connected to the output of the control unit, the input of which is connected to the output of the information converter, power sensor with electronic key, output connected to the input of the information converter, characterized in that, for the sake of simplification, the information converter is made in in the form of a differentiation unit with an output filter, a Hall sensor is inserted into the power sensor, located in the non-magnetic gap of the power inductor made with an additional winding, the control electrodes of the Hall sensor are connected to the input terminals, the output of the Hall sensor through an electronic key is connected to the output of the power sensor, and the control input of the electronic key is connected ¹ through the input pulse former to the additional winding of the inductor. Figure 2