SU758381A1 - Device for charging energy storage - Google Patents

Description

The invention relates to devices for charging batteries from the network through converters and can be used to charge the energy storage devices in various pulsed devices. wah ''

Known devices charge energy storage devices with linear chokes.

The device contains a power supply, rectifier, choke, connected in series to the charging circuit and providing a resonant charge of the drive [ΐ].

The disadvantage of such schemes is 15 change in the amount of current consumed from the network and, therefore, not the maximum possible value of charge efficiency.

Chargers with circuits for maintaining a constant charge current through the help of key devices regulated by feedback commands are known, containing a power source, a converter, a rectifier, a key device and a feedback circuit 25 for controlling the key device with charge current [2].

The advantages of such devices include the controllability of the charging process and the ability to provide

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consumption of constant current from the network by selecting the operating mode of the key device.

The disadvantage of the device is the presence of additional energy losses in the key device, which leads to the limitation of the efficiency of charge.

The closest charge device: a battery contains a DC power source, a volt-bypass DC-to-AC converter and a choke connected between the converter and the rectifier. When the battery is charged, the power source is in series with the converter [3].

The disadvantage of this device is the variability of the magnitude of the charging current consumed from the network, since the main part of the source energy is consumed by the battery without conversion, and the choke limits only the charging current of the booster converter, as a result of which the charging efficiency is limited,

The purpose of the invention is to ensure the consumption of constant power from the set758381 4

t by eliminating inrush current and increasing charge efficiency.

To achieve this goal, a charge current sensor connected between the rectifier and the drive was inserted into the device, the timing chain made in the form of a capacitor and a transistor included in the diagonal of the rectifier bridge, the transformer of the converter's master oscillator is provided with an additional winding that time passes through the transistor the chains are connected to the bases of the transistors of the master oscillator, and the time-capacitor capacitor is connected to the terminals of the base windings of the transformer which drives the generator and 15 converters

Figure 1 shows the structural diagram of the device for charging the energy storage device; figure 2 - functional diagram of the connection time-chaining-20 ki ............

Energy storage device 1 is connected to ‘power source 2 via converter 3. Between output transformer 4 of converter 3 and rectifier 25, tele 5 is connected. Line choke b. Between the drive 1 and the rectifier 5 is connected to the sensor 7 of the charge current, which is connected to the master generator of the converter 3 through the timedating chain 8.

The capacitor 9 timing chain (see Fig.2) is connected to the base windings of the transformer 10 of the master oscillator. Between the bases of the transistors of the master oscillator are connected in series the additional winding 11 of the transformer 10 and. bridge rectifier 12, in the diagonal of which is included the transistor 13 timing chain. The input of the transistor 13 40 is connected to the sensor 7 charge current.

The device works as follows.

. When converter 3 is connected to power source 2 via choke 45 6, drive 1 begins charging. A signal proportional to the charge current from the charge current sensor 7 is fed to the input of transistor 13 in the time reference chain 8. Transistor 13, included in the diagonal of bridge 12, plays the role of variable resistance which, together with the capacitor 9 determines the frequency of the master oscillator of the converter

3. The frequency of the inverter 3 is changed in the process of charging the drive 1 is proportional to the magnitude of the charge current

from the maximum value at the beginning of the charge to some minimum. The choke b, installed in the AC circuit, is a variable inductive resistance with changing frequency of the converter and performs the charging current limitation as per the slew rate

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and in magnitude (<· 2 <ϊ 11 “).

Since the current-limiting element is the inductance, and the charge current is kept constant, the losses in charge of the drive in all elements of the circuit are minimal and the efficiency of the charger is high.

Claims (1)

Claim A device for charging the drive, energy, containing a power source, a static DC / AC converter with key elements, an output transformer, a master generator with key elements and a transformer with additional winding, a rectifier, a choke connected between the output transformer of the converter and a rectifier, that, in order to ensure the consumption of constant power from the network by eliminating current surges, the charge current sensor connected between A funnel and accumulator, and a timing chain made in the form of a capacitor and a transistor whose collector and emitter are included in the diagonal of the rectifier bridge, the tops of the other diagonal of which are respectively connected to the base of one of the transistors of the master oscillator and to one of the terminals of the additional winding of the master oscillator transformer, the second terminal of which is connected to the base of the other transistor of the master oscillator, and the time capacitor capacitor is connected to the terminals of the base windings of the transformer for giving generator