SU741374A1 - Device for charging-discharging storage batteries - Google Patents

Description

one

The invention relates to the electrical industry and can be used to charge and discharge chemical current sources.

Devices for charging and discharging batteries are known, which contain an adjustable voltage converter made on the basis of a magnetic amplifier 1, 2J.

Of the known devices, the closest in technical essence is a device comprising an adjustable voltage transducer based on a magnetic amplifier, a rectifying bridge, a block of resistors, feedback and control units 3.

The charge current of this device is determined by the formula:

 and - the voltage on the regulator's regulator,

E is the voltage across the batteries,

R is the resistance of the charging circuit. EMF of batteries can be represented as follows:

E

LU,

2

initial voltage on

where EO is the accumulator, the increment of the emf is on the battery &

Then:

-, Un-Eol & y0

to where UQ is the initial voltage at the regulator output;

voltage increment during charging. As can be seen from the equality, the voltage at the output of the regulator is the sum of two terms — a certain constant value UQ compensating for the EO, and whether or not the controlled variable provides the specified value.

20 charge and discharge mode under the influence of various destabilizing factors: a change in the back emf, a change in the number of batteries, a circuit resistance, etc.

25For example, for nickel-cadmium

batteries, the initial charge voltage at rated current is 1.45-1.5 v, and the final one is 1.751, 85V, i.e. the initial component is 70%, adjustable 30%.

In the known device, all necessary voltage is regulated; and the voltage value

The power of the regulator is determined by the formula: -.

  laks llszk.s

where is odda and. max} -2male ae voltage and current at the controller output

It is known that the weight of a transformer and a magnetic amplifier is approximately proportional to their mass.

Thus, from what has been stated above, В№з; but that the known device possesses excessive weight, and dimensions and excess voltage of the controlled voltage.

The aim of the invention is to angle: the weight and dimensions of a charge-discharge device.

This goal is achieved by the fact that a rectifying bridge, a resistor unit, a feedback unit, a control unit, a transformer and keys are inserted into a device for charging and discharging batteries, which contains an adjustable voltage converter, which is connected to the base of a magnetic amplifier, connected to the control unit and connected between the transformer and regulated by a voltage converter such that the secondary winding of the transformer is connected in series with a recirculated voltage converter and they together connected to the rectifier bridge.

 Moreover, the cyivTiviapHoe voltage (power) of the transformer and the adjustable voltage converter is equal to the voltage (power) required for charging and discharging the batteries.

FIG. 1 shows a block diagram of a device for charging and discharging batteries with single-phase power supply in FIG. 2. A version of a device for charging and discharging accumulators with three-phase power supply.

The device for charging and discharging batteries (Fig, 1) is regulating a voltage converter 1, consisting of a short-circuit magnetic amplifier 2, a transformer 3, a rectifying bridge 4, a power transformer 5, keys b, 7, a reverse-link device 8, the bit match 9, the control device 10, the battery 11 ,.

The tool operates in a general way.

In charge mode, the battery 11 is connected in series to each other and to a separate fy converter. voltage 1,

In the initial state, key 7 is closed, and key b is open. The voltage at the output of the adjustable converter 1 determines the current in the circuit of the battery 11. In the normal charging mode, the signal at the output of the feedback device 8 provides the magnitude of the required current. When exposed to various destabilizing facts. the current varies in the charge circuit and

at the output of the feedback device 8, an error signal appears, which is fed to the input of the control device 10. The control device .10 acts on the adjustable transducer 1 by changing the inductive

 the resistance of the magnetic amplifier 2, and thus the voltage at the output of the transformer 3, to compensate for the effect of destabilizing factors. As the charge increases, the voltage increases.

5 at the terminals of the battery 11. When. reaching on. the output of the adjustable converter 1 maximum voltage, the control device 10 softens the key 7 and za-kaet key 5.

Q A power transformer 5 and an adjustable converter 1 are connected in series according to.

Now the current in the charge circuit is determined by the difference between, the sum of the voltage of the transformer 5 ,. adjustable transformer 1 and the voltage of battery 11,

Current control under the influence of destabilizing factors and an increase in voltage on the battery 11 is carried out using an adjustable converter 1.

As the batteries S turn off, the battery 11, when it reaches the final voltage on each of them,

5, the EMF of battery 11 decreases, and the voltage on regulator 1 also decreases,

When it reaches the adjustable voltage converter 1, for example, voltage 0 5 keni at the output close to zero, st. The control arm 10 instructs the key b to be opened, and for the key 7, the charge current is now only controlled

j preobraztelekhl 1 „

When discharging, the battery 11 is connected in series to the variable voltage converter 1.

f. Since the resistance of the semiconductor diodes of the rectifying bridge 4 and the direct connection is small, the discharge current is limited by the inclusion of discharge resistance 9 in the discharge circuit of the α block.

5 When disconnecting the set current

(for example, a decrease in the emf of the battery 11) at the output of the feedback device 8, the signal acting on the control device 10 is controlled. The control device 10 acts on the regulator 1, the output voltage of which increases and compensates for the decrease in the emf of the battery 11.

If the voltage at the output of the adjustable converter 1 is not

Claims (2)

Claim A device for charging and discharging batteries, containing an adjustable voltage converter based on a magnetic amplifier, a rectifier bridge, the input of which is connected to the batteries through a resistor block and a feedback • unit, a control unit, input of which. q Horn is connected to the output of the feedback block, and one of. outputs - to an adjustable voltage converter. characterized in that in order to reduce weight and dimensions, it is equipped with a transformer and keys connected to the control unit and connected between the transformer and the adjustable voltage converter so that the secondary winding of the transformer 20 is connected in series with an adjustable voltage converter,. and together they are connected to the rectifier bridge. a) reduce 25-30%; b) c) ty; d) weight on average to reduce, reduce dimensions by -30%; power consumption 2. Copyright 536567, cl. N