SU892577A2 - Device for charging storage battery with asymmetric current - Google Patents

Description

(5) DEVICE FOR ACCUMULATOR BATTERY CHARGING ASYMMETRIC CURRENT The invention relates to electric and can be used in devices designed to charge batteries of various types and purposes. According to the main author. St. No. 773828, there is a device containing a rectifier, a rectifier control system, one output of which is connected to control inputs of rectifier valves, and one input to the output of control current, an inverter whose input is connected to the output of rectifier through a smoothing reactor, and the output is connected to the output pins, the current sensor and the controllable delay node, the output of which through the pulse shaper is connected to the control inputs of the inverter valves, the pulse counter, the decoder, the counter zeroing node, the count inhibit node and the first input of the account inhibiting node is connected to another output of the control system, the output to the counter input, the outputs of which are connected to the corresponding inputs of the decoder, the first output of which is connected to the input of the controlled delay node and the first input of the coincidence circuit, the second output to the second input of the node prohibition, the second input of the coincidence circuit and the first input of the counter zeroing unit, the second input of which is connected to the output of the current sensor, and the output of the coincidence circuit is connected to another input of the control system G1. 1 A disadvantage of the known device is that it does not allow to adjust the duration of the discharge current pulse over a wide range and does not allow the battery to discharge the asymmetric current, which limits the functionality of the device. In addition, the duration of the charge-discharge cycle is limited by the capacity of the counter. The purpose of the invention is to expand the functionality of the device. The goal is achieved by the fact that the device for charging a battery with an asymmetric current, contains a rectifier, a rectifier control system, one output of which is connected to the rectifier valve control inputs, and one current regulator output, an inverter, the input of which is connected to the output of the rectifier through a smoothing reactor, and the output is connected to the output terminals, a current sensor and a controllable delay node, the output of which through the pulse shaper is connected to the control inputs of the inverter gates, counting pulse pulse, decoder, counter zeroing node, account ban node and coincidence circuit, the first input of the account ban node is connected to another output of the control system, and the output to the counter input, the outputs of which are connected to the corresponding inputs of the decoder, the first output of which is connected to the node input controlled delay and the first input of the coincidence circuit, the second output - with the second. The input of the prohibition node, the second input of the coincidence circuit and the first input of the counter zeroing node, the second input of which is connected to the output of the current sensor, and the output of the coincidence circuit is connected to another input of the control system, an adjustable pulse generator is inputted, the output of which is connected to the additional input of the prohibition node account, input - with the output of the prohibition account node, and the output of the controlled delay node is connected to the additional input of the coincidence circuit. Fig. 1 is a schematic electrical block diagram of the device proposed; Fig. 2 shows the voltage of the device at various points of the device, which explain its operation. The device contains a rectifier 1, a rectifier control system 2, one input of which is connected to the output of current regulator 3, including, for example, a current setpoint k, a current sensor S and a voltage sensor 6 at the input of the inverter. The rectifier 1 through a smoothing reactor 7 is connected to the inverter 8, which is made by a bridge circuit, for example, on two uncontrolled 9, 10 and two controlled 11 and 12 valves. The battery 13 is turned on in the diagonal of the inverter. Throttles I and 15 limit the rate of increase of current through the valves. The control inputs of the valves 11 and 12 are connected via a pulse shaper 16 to the output of a controllable delay unit 17, the control input of which is connected to the output of the discharge current sensor 18. The software block 19 controlling the operation of the rectifier and the inverter consists of the counting prohibition node 20, the pulse counter 21, the decoder 22, the coincidence circuit 23 and the counter zeroing node 2k. The first output 25 of the decoder 22 is connected to the input 26 of the controlled delay node 17 and the first input 27 of the matching circuit 23. The second output 28 of the decoder is connected to the second input 29 of the inhibiting node 20, the second input 30 of the matching circuit and the first input 31 of the counter zeroing node, the second input 32 which is connected to the output 33 of the current sensor 5. The output of the coincidence circuit is connected to the input 3 of the control system 2, the output 35 of which is connected to the first input 36 of the account inhibiting node. The output 37 of the zeroing unit 24 is connected to the input O of the counter, i.e. the installation input to the zero state. The output of the controlled delay node 17 is connected to an additional input 38 of the coincidence circuit 23. The output 39 of the adjustable oscillator Q is connected to the additional input C of the counting prohibition node 20, and input 42 with the output 43 of the counter-prohibiting node 20. The frequency of the output pulses of the generator 40 is controlled by a frequency adjuster 44. The device works as follows. After switching on the supply voltages, the counter 21 is set to the zero state, control pulses are not applied to the inverter PI 12 gates. At the same time, before the occurrence of the current in the power circuit of the device at the output 37 of the zeroing unit 24, the signal holding the counter in the zero state is preserved, and the pulses from the output 35 are set (the generator of the control system 2 goes through the prohibition node 20 to the counter input a pulse at the output 39 of an adjustable generator 40. When current appears in the power circuit of the device, the signal at the output of the zeroing unit changes, the counter 21 is switched to the operating state and starts switching with the arrival of each pulse from the output 39 of the regulated generator 0, and synchronously with the clock pulses of the master oscillator of the control system 2, which are output from output 35. The output impulse of the counting prohibition node 20 sets the generator 0 to the initial state C2 of input state 2. At the same time, the counter 21 actually calculates the current charging pulses a battery that flows through uncontrolled gates 9 and 19 of the inverter 8. The current value is determined by setting the current setpoint k and is maintained by a constant signal at the output of current regulator 3, the signal at output 25 of the decoder 2 determines the duration of current charge pulses, which is a multiple of the current ripple duration and is determined only by the number of phase voltages supplying the rectifier and its power circuit (for a three-phase bridge circuit, the pulse duration is 3.33 ml / s). The signal at the output 25 of the decoder 22 turns on the controllable delay node 17, and through the coincidence circuit 23 converts rectifier 1 into the mulvertor mode (the transfer signal to the inverter mode is fed to input 3 of the control system 2 from the output of the coincidence circuit 23). Through the delay time determined by the signal at the output of the discharge sensor 18, the control impulses are fed to the inverter valves 11 and 12 from the output of the pulse shaper 1 and the discharge current of the battery is formed. The output of the node 17 of the controlled delay at the input 38 of the coincidence circuit is given a signal that blocks the input 27 of the coincidence circuit, and from its output the signal is transmitted to transfer the rectifier 1 to the inverter mode. Rectifier 1 opens again, and its output current is determined by the signal at the output of current regulator 3, i.e. it is maintained at a predetermined level. The discharge current flows through the battery until counter 21 is set to the state at which a signal appears at the output 28 of the decoder. This signal blocks the operation of the counter via the cutout node 20 of the prohibition (input 29), converts the rectifier into inverter mode via the coincidence circuit 23 and prepares the node 2k for resetting the Counter, which, by a current sensor signal (current zero), resets the counter. In this case, the control pulses of the inverter 11 and 12 are absent (there is no signal at the output 25 of the decoder), and the signal for inverting the rectifier is removed. After this, the cycle of operation of the device is repeated. At the same time, the duration of the charge-discharge cycle is determined by the counter capacity and the pulse frequency of the controlled generator 40. By adjusting the frequency of the pulses at the output of the generator 40, it is possible to control the duration of the charge-discharge at wide limits (from 10-20 ml / s to several minutes). cycle. At the same time, the duty cycle of charge-discharge pulses is determined by the INPUT code of the decoder. Thus, in the proposed device, the duration of a charge-discharge current pulse is determined by the input code of the decoder and can be arbitrarily controlled depending on the type of battery and the charge mode, which results in expanding the functionality of the device. In this case, if the code of the decoder is selected in such a way that the duration of the discharge pulse is longer, then the discharge mode of the battery is carried out with an asymmetric current. The change of code of the decoder can be done by switching the mode of operation of the device. Claims of the invention A device for charging an accumulator battery with an asymmetrical current according to autos, N, 773828, characterized in that, in order to expand its functionality, a frequency-controlled pulse generator is fed into it, and the prohibition node and the coincidence circuit are equipped with additional inputs, the output of the aforementioned pulse generator is connected to the auxiliary input of the account inhibiting node, its input is connected to the 7th output of the account node, and the output of the controlled delay node is connected to the auxiliary input of the coincidence circuit. 892577. 8 Sources of information taken into account in the examination of 1, USSR Author's Certificate K-773828, cl. And 02 J 7/02, 1978.

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Claims (1)

Claim Device for charging a battery with asymmetric current according to _m ed. St. 1 “773828, I distinguish ⁵⁰ with the fact that, in order to expand the functionality, a frequency-controlled pulse generator is introduced into it, and the inhibit unit and the coincidence circuit are equipped with additional inputs, while the output of the mentioned pulse generator is connected to an additional input node ban account, its input is connected to. Ί 892577 8 to the output of the account prohibition node, and the output of the controlled delay node is connected to the additional input of the coincidence circuit.