SU966815A1 - Device for charging buffer storage battery - Google Patents

Description

(.B) DEVICE FOR CHARGING A BATTERY ACCUMULATOR BATTERY

one . . The invention relates to the electrical industry, namely to charging batteries, and can be used on diesel locomotives and other vehicles, as well as in uninterrupted power supply devices. BACKGROUND OF THE INVENTION BACKGROUND OF THE INVENTION BACKGROUND OF THE INVENTION BACKGROUND OF THE INVENTION Some devices for charging buffer batteries are known in which part of the consumers are powered from the battery by discharging under reduced voltage, while aligning the arms of the battery is carried out using ballast resistances fl. Such devices are uneconomical and do not level the charge of the shoulders. multiplier batteries in all cases, since depending on the mode of operation of the battery, the load consumes different currents. A vehicle electrical supply device is also known, which contains a synchronous generator with a crust winding and excitation winding, a full-wave rectifier with a number of branches equal to the number of phases of the synchronous generator crust of TOfja, a battery with a more loaded and less loaded half-battery, a voltage regulator, the diode, the total load of the battery and the individual load of the half-battery 2. Such a device is not currently used in diesel locomotives, since it is considered rational to carry on: recharge the batteries The battery is supplied by a DC machine, which also performs the function of a starter when starting a diesel engine from a starter-generator. The closest p to the technical essence of the present invention is a circuit of a device for charging a battery in a buffer mode, consisting of; from the stator-reHepatopa, diode, battery, having an average outlet and consumers. The main consumers are switched on for the full battery life, but some of them (automatic locomotive signaling and radio stations) are switched on at half the battery voltage, i.e. into different parts of it by means of a medium allotment. The charge of both shoulders of the battery is led from the starter-generator through the diode 3. V Low-voltage consumers, though. consumes approximately the same current, creating a significant difference in the charge of the parts of the battery. This occurs due to the fact that consumers have different time states in the loan from the operating conditions and the difference in the consumed currents. This leads to their premature failure (sulphation of negative plates of uncharged and premature shedding of positive plates of rechargeable batteries. The purpose of this invention is to equalize the charge of individual parts of the battery during charging. charge buffer battery, having taps for powering individual consumers with reduced, power supply, containing a unit for charging a full battery current source or voltage transformer with current limiting resistance in the primary winding circuit, recorded from the AC source, and the secondary windings of the transformer are connected to each part of the battery in the charging direction through rectifiers. Fig. 1 is a schematic diagram devices for charging an accumulator battery in a buffer mode using a transformer; FIG. 2 is a variant of the device with a reduced number of rectifiers using a voltage transformer with connectors in the primary winding. The device for charging the battery in the buffer mode contains a starter-generator 1, a series of diode 2, an accumulator battery 3 having an average tapping and a starter generator connected in parallel (ru, locomotive signaling and radio station 5. connected in parallel to each battery shoulders, and common load 6, connected parallel. for the entire battery. A transformer 4 ka 7 is connected to an alternating current circuit of a traction generator, and the secondary windings of a transformer 8 and 9 are connected to each part of the battery in the direction of the secondary via bridge rectifiers 10 and 11. The device works as follows. Battery 3 is charged from starter generator 1 through diode 2. Secondary winding B of current transformer 7 and bridge rectifier 10 form a voltage source to recharge the top of the battery (Fig. 1). Similarly, the rectifier 11 with the winding 9 of the transformer forms the same rectifying circuit for charging the lower part of the battery. The output voltage of these rectifiers cannot differ significantly, since they are powered by the same windings having a common magnetic flux. In this case, the secondary current can flow only through one of the secondary windings, not. Call; a significant drop in the voltage across it (due to the smallness of active and reactive resistance). With a difference in the emf of both parts of the battery in a fraction of a volt, the output current of the charge is consumed mainly by that part of the battery whose voltage is lower. FIG. Option 2 with a reduced number of rectifiers, which are powered from the terminals of one secondary winding of a voltage transformer 12. A low voltage load is connected to the bottom suit of the battery. A group of rectifiers 13 and 1 "(Fig. 2) form a bridge circuit for charging the entire battery, 14 and 15 - For the bottom of it. In case the battery has a branch from the middle, the group of diodes H is absent, and the battery branch is connected to the middle branch of the secondary winding of the transformer. The current limiting resistance 16 can be both active and reactive. Other straightening patterns are possible, including increasing the number of sections of the battery. The device proposes to use the difference. EMF of batteries charged to varying degrees and differently loaded, as well as the effect of leveling voltages on the windings of a transformer with resistance in the primary winding or current transformer.

The secondary windings of a transformer have a total magnetic flux and usually a relatively small voltage drop across the windings of transformers, depending on the load, due to the smallness of their resistances. The charge from the auxiliary device to one or both parts of the battery is compensated by decreasing the total current from the starter generator 1 through diode 2.

Transformer 7 must have sufficient power to compensate for differences in load points and 5 for a sufficiently long period of time, taking into account the different modes of their duration, without providing the specified compensation in some of the modes.

The device can be used primarily in installations where there is no main AC network, since, if there is a network, using a transformer with rectifiers, it is easy to get a power source to any DC voltage.

The device may find application, for example, in uninterrupted power supply devices with a small number of undervoltage consumers, when installing an additional battery is not practical. On vehicles, the AC network is in most cases absent, and the current and voltage of the existing power sources vary widely, so stabilizing them for powering low-voltage consumers is practically impossible. For example, in a diesel locomotive; iT3116, the excitation current of a genset generator varies more than

than 5 rzz depending on the mode of movement of the train. The excitation of the traction generator can be turned off altogether in those cases when the radio station should work and the automatic locomotive signaling should work.

The use of the device allows to increase the battery life, its reliability without a significant increase in size and complexity of the circuit.

Claims (3)

1. Heat locomotive 2TE10V. Operation and maintenance manual. M., Transport, 1975. 2. USSR Author's Certificate No. 58923, cl. H 02 J U / S, 1975. 3. Heatplow 2TE116. Instructions for operation and maintenance 2T3116. OF. 00