RU2001501C1 - Voltage control of a c generator of motor vehicle - Google Patents

Description

the introduction of a pulsed generator, waiting for the multivibrator and the method of their connection with each other and with the existing nodes of the voltage regulator, that is, the proposed technical solution meets the criterion of novelty.

A comparison of the distinguishing features of the proposed solution with the known technical solutions shows that the newly introduced pulse generator and the standby multivibrator are well known. However, their introduction into the above connection exhibits the following non-obvious advantages:

1) a significant increase in the capacity and service life of vehicle batteries in comparison with the known technical solutions due to the implementation of a method of charging batteries for recharging them as part of a vehicle with its engine running;

2) an additional increase in the capacity and service life of the batteries by providing modulation of not only the charge, but

and discharge current of batteries with a frequency of 230-235 Hz;

3) the implementation of a new method for stabilizing the voltage of the vehicle’s alternator by adjusting the duty cycle of the current pulses in its field winding at a fixed frequency.

All this allows us to consider the proposed technical solution as essential differences.

In FIG. Figure 1 shows a structural diagram of the proposed generator and its functional connection with the electrical equipment of the vehicle.

The controller contains a pulse generator of frequency 230-235 Hz 1, a standby multivibrator 2 with a control unit for pulse duration 3, a threshold element 4, an electronic key 5. Using terminal b, the measuring input of the controller is connected to the output + battery 10 of the vehicle, via terminal 8, the output of the voltage regulator is connected to the excitation winding of the vehicle alternator 9. The output of the generator 9 is connected to the terminal of the battery 10 and through the switch 12 to the electric consumers 11 of the vehicle and to the terminal 7 of the voltage regulator. The proposed regulator itself is dashed around the dotted line.

The controller operates as follows.

After closing the switch 12, the voltage from the battery 10 is supplied to

the controller terminal 7 as the input voltage of the electronic key 5. as well as the supply voltage of the pulse generator 1 and the standby multivibrator 2 with a pulse width control unit 3. In this case, the pulse generator 1 generates rectangular pulses of a frequency of 230-235 Hz, one of the fronts which is triggered by the standby multivibrator 2. At the output of the standby multivibrator 2, rectangular pulses of frequency 230-235 Hz appear, the duration of which depends on the voltage at the input of the control unit 3.

C, the output of the standby multivibrator 2, the pulses are fed to the control input of the electronic key 5, therefore, at the output of the key 5 (terminal 8 of the controller) voltage pulses appear with a frequency of 230-235 Hz and with a controlled duration, which are fed to the winding driving the vehicle alternator 9.

With a low frequency of rotation of the shaft of the generator 9 (vehicle engine starting mode) or low resistance of energy consumers 11, the voltage at the terminal of the regulator is less than the threshold for operating the threshold element 4. Moreover, the voltage at the output of the threshold element 4, and, therefore, at the input control unit 3 is equal to zero, and the pulse duration at the output of the standby multivibrator 2 is maximum and close to the pulse repetition period from the output of the pulse generator 1. Therefore, the average value of the charging current of the battery 10 from alternator 9 is maximized, and the voltage in the vehicle electrical system and at the terminals of battery 10 is increased. With an increase in the rotation frequency of the shaft of the generator 9 or an increase in the resistance of energy consumers 11, the voltage at the terminal b of the controller becomes greater than the threshold of the threshold element 4, the output voltage of the threshold element 4 is the control voltage applied to the input of the control unit 3, the pulse duration standby multivibrator 2. As a result, the duration of the pulses from the output of the standby multivibrator 2 is reduced to the minimum, the average value of the charging current of the accumulator 10 from the generator 9 is also minimal, acc mule torus 10 is discharged through the power consumer 11, and the voltage on-board network of the vehicle and on vyvodlh accumulator 10 is reduced so far. until it becomes less than the threshold of szPtmn; and of the threshold element 4. After this, the entire cycle is repeated.

Depending on the circuitry, the solution of the control unit 3, two kinds of voltage regulation characteristics at the terminals of the battery 10, shown in Fig. 2, are possible.

In FIG. Figure 2a shows the change in the ratio of the duration of voltage pulses at the output of the regulator to their repetition period, depending on the magnitude of the voltage at the input of the regulator (terminal 6) with a discrete nature of regulation (digital construction of node 3).

Fig. 26 shows the same relationship with the continuous nature of the regulation (analog construction of unit 3).

In FIG. The following notation is accepted:

U is the voltage value at terminal b;

Un trigger voltage of threshold element 4;

Claims (1)

The claims VEHICLE GENERATOR VOLTAGE REGULATOR REGULATOR, Containing an electronic key and a threshold element, characterized in that a resonant frequency pulse generator is connected in series and waiting 5 T is the pulse repetition period at the output of the pulse generator 1: g - the duration of the pulses of the waiting multivibrator 2. For mass-produced passenger cars, it is advisable to choose a range of variation in the value the indications in figure 2 from (oo) - min before () Tmax (56) Copyright certificate of the USSR No. 524301. class H 02 P 9/10. 1976. SSSG copyright certificate No. 669465, cl. H 02 P 9/10, 1979. USSR author's certificate N 1206862, 1986. a multivibrator with an adjustable pulse duration, the output of the multivibrator connected to the control input of the electronic key, and the control input to the output of the threshold element. T t tukh men and tin c G G f Mffx / ffl / t V v