SU1283895A1 - Device for charging storage battery - Google Patents

Abstract

The invention can be used to charge batteries. The purpose of the invention is to increase the reliability of the device. When the reference voltage source (IAN) 7 and the two-level stabilized voltage source (yen) 10 are turned on, the output of the integrator (I) 4 generates a signal that is comparable to the generator switching voltage (G) 3. At the moment of equality of the compared voltages, G 3 forms pulse, opening thyristor switch 2. Current is flowing through the load. The key is powered from the limiter of the control range (TAC) 8 in the range from the minimum steering angle to maxi (L

Description

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minimum (X, A, O1x) The voltage on the power input of switch 2 is a control switch for the power level switch 11, which connects to the power input G 3 yen 10. If G 3 is turned on at a lower voltage level yen 10, by regulating this voltage prevent the formation of the next control pulse. The device provides a hundred

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The invention relates to electrical engineering, namely, to thyristor converters of direct current with stabilization of the output parameter, and can be used for charging batteries.

The purpose of the invention is to improve the accuracy of the base, the output parameter and the reliability of the device.

Fig. 1 is a block diagram of a device for charging a battery; in fig. 2 - time diagrams of voltages, which are used for the operation of the device.

The device for charging the battery contains a three-phase semi-controlled rectifier 1, a circuit key 2, a generator 3 on a single-transient transis-mount, an integrator 4, a load current sensor 5, a current setting device b, a reference voltage source 7, a control range limiter 8, a second thyristor switch 9 with a coupling capacitor in the unlocking circuit, a two-level stabilized voltage source 10, and a power level switch 11.

The integrator input is connected to the load current sensor 5 and through the current setting device 6 to the source 7 of the reference voltage. The output of the integrator 4 and the output of the second thyristor battery 9 are connected to the control input of the generator 3 on a single junction transistor, to the power input of which and to the input of the thyristor switch 9 through the power supply level switch 11 is connected

ka 10 stabilized voltage.

83895

bilization load current. At the time of the formation of the control pulse G 3, the readings of AND 4 are reset to the value of the residual voltage using a thyristor switch 9. The device eliminates the generation of pulses outside the permitted control range and improves the accuracy of maintaining the output parameter. 2 Il.

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The output of limiter 8 of the control range is connected to the control input of the power supply level switch 11 and to the power input of the thyristor switch 2, the control input of which is connected to the output of the generator 3, and the outputs are connected to the corresponding inputs of the three-phase semi-controlled rectifier 1.

A device for charging a battery operates as follows.

With the reference voltage source 7 and the stabilized voltage source 10 at the input of the integrator 4, the control signal voltage 12 (in Fig. 2, the shaded area) operates. This signal is equal to the difference of the signals from the output of current setting device 6 (voltage 13) and from the output of load current sensor 5 (voltage 14). At the output of the integrator 4, a time-varying voltage signal 15 is formed, which is compared with the turn-on voltage 16 of the generator 3 at the unijunction transistor. At the moment od; the equality of the voltages 15 and 16, the generator 3 generates a voltage pulse | 7. This pulse arrives at the control input of the thyristor switch 2, the supply input of which receives a signal (voltage 18) from the output of limiter 8 of the control range, and this signal comes in the interval from the minimum control angle otp,; to the maximum steering angle oi. At the moment oi; thyristor key 2 opens for all thyristor control transitions three-phase

A semi-controlled rectifier 1 is given a control pulse. In this case, the thyristor with the highest anode voltage opens and current begins to flow through the load. Then, the anode voltage of the open thyristor decreases and it closes.

Thyristor key 2 transmits a current in the interval ot p ,; /. Voltage 18 at its power supply input

almost to zero. Outside the allowed range in the inter / OS

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the key is closed and remains closed until the time when the voltages 15 and 16 are equal again and the generator voltage is again generated by the voltage 17, while the thyristor key 2 opens and is open in the interval / oi; -o1-gp n g

The voltage 18 at the input of the thyristor switch 2 is used to synchronize the generator 3, since this voltage is the control for the power level switch 11, which connects the lower voltage 19 from the two-level stabilized voltage source 10 to the power input of the generator 3 generator 3 is in the interval / (X, oi; /, and the upper level is in the interval m; ni4i /, i.e. after generator 3 triggers, and in the interval / cd.

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The parameters of the integrator 4, the load current sensor 5 and the current setting device 6 are selected such that the generator 3 is turned on at the lower voltage level 19 ... When this level increases in the device is pre-. The formation of a next control pulse with a control angle c, ,, ,, less than 0 / is prevented. ,, since the voltage 15 at the output of the integrator 4 does not have time to reach the value of the automatically increased voltage 16 of switching on the generator 3.

The increase in the voltage level 19 after the formation of the control pulse by the voltage 17 does not affect the processes in the circuit: current setting device 6, load current sensor 5, integrator 4. Information about the set and actual load current is constantly processed at the input of generator 3. In the steady state mode

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You generator 3 generates pulses through 120 e. hail.

If during the charging of the battery the load current for some reason decreases, the voltage 14 from the load current sensor 5 also decreases, the control signal voltage 12 will increase and subsequent control pulses will form with a smaller control angle to those until the load current rises to a predetermined level. With increasing load current, the process will be reversed.

At the moment of generation of the control pulse by generator 3, the readings of integrator 4 are reset to a residual voltage value of 20, commensurate with the turn-on voltage of generator 3. Reset of the readings of integrator 4 to zero are performed using a thyristor switch 9 with a coupling capacitor in the unlocking circuit, which switches from the closed state to the open state when the voltage 19 is changed from the lower level to the upper one after the generation of 3 control pulses by the generator. In this case, through the open thyristor key 9, the output of the integrator 4 is short-circuited and its readings are reset to zero.

In the case of a control pulse, resetting the readings of the integrator 4-5 to zero is performed at the end of the enabling control range to prevent the generation of incisive control pulses from the control angle,

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The thyristor key 9 returns to the closed state when its anode current is reduced to a value less than the static holding current of the thyristor.

Thus, in the proposed device, the generation of pulses is excluded outside the permitted control range and the integrator is reset to zero, thereby improving the accuracy of maintaining the output parameter and the reliability of the device.

Claims (1)

Invention Formula A device for charging the battery of the battery, containing an integrator, to the input of which a sensor is connected charge current of the battery and through the current setting unit - the source of the reference voltage, and the integrator output is connected to the control input of the relaxation generator on a single-transistor, a three-phase semi-control rectifier, a thyristor switch and a control range limiter connected to the power supply the input of the thyristor key, the control input of which is connected to the output of the relaxation generator, and the outputs are connected to the inputs of the three-phase semi-controlled rectifier, characterized in that adezhnosti mLnL. (fnayff. imini i L-f Fia. 2 operation of the device, a second thyristor switch with an isolating capacitor in the unlocking circuit, a two-level stabilized voltage source and a power level switch, the output of the stabilized voltage source connected to the first input of the power level switch, the second input of which is connected to the output of the control limiter, and the output is connected to the input of the second thyristor key and to the power input of the relaxation generator connected by a control input to the output of the second ton ristornogo key. at