TWM444312U - Vehicle power supply device with stable generator power output - Google Patents

Description

Vehicle power supply device with stable generator power output

The present invention relates to a vehicle power supply device, and more particularly to a power supply device that separates charging and power supply wiring to provide a stable output power to a vehicle load line.

Please refer to FIG. 9 , which is a circuit wiring block diagram of a conventional vehicle power supply device. The power supply device includes a generator 41 and a rectifier 42 . The output of the generator 41 is connected to the input end of the rectifier 42 . When the vehicle is started, the generator 41 starts operating to generate an AC voltage, which is output to the rectifier 42 and converted to a DC voltage by the rectifier 42.

The output of the rectifier 42 is connected with a plurality of sets of output power lines 43 which are directly distributed to different loads or electronic devices inside the vehicle, for example, the output power line 43 is wired to the vehicle's lights, and the direct current voltage is directly Supply to the lights.

However, the existing power supply method causes a problem that the voltage is unstable and the load is abnormally operated. This is because the power generated by the generator 41 fluctuates with the vehicle speed. When the vehicle speed is faster, the generated voltage will be higher. On the contrary, the slower the vehicle speed, the generated voltage is relatively smaller. Therefore, the rectifier 42 is The received AC voltage is not a stable voltage, and the converted DC voltage is naturally not stable.

After the unstable DC voltage is directly supplied to the electronic device inside the vehicle body via the output power line 43, the electronic device is abnormally affected by the floating DC voltage, for example, the lamp will be dimmed with the speed of the vehicle. Bright, unable to maintain a fixed illumination brightness; in addition, when the DC voltage is abnormally increased, it may even directly burn the electronic device.

Moreover, the voltage directly output by the rectifier 42 is a relatively large voltage, and the locomotive is exemplified by about 14.8V. When the large voltage is directly applied to the electronic component for a long time, the service life of the electronic component is shortened, and the electronic component is damaged.

In view of the fact that the DC voltage outputted by the existing vehicle power supply device is not stable, the internal electronic equipment of the vehicle is prone to abnormal operation. The main purpose of this creation is to provide a vehicle power supply device that separates the charging and power supply lines to provide a stable output voltage.

In order to achieve the foregoing objectives, the vehicle power supply device with stable generator power output includes: a generator installed in the vehicle and outputting an alternating voltage; and a rectifier connected to the output end of the generator to receive the alternating voltage The rectifier converts the alternating current voltage into a first direct current voltage and outputs the first direct current voltage from an output end; a battery having a positive terminal and a negative terminal, the positive terminal being connected to the output end of the rectifier to receive the first direct current voltage The negative terminal is grounded; a plurality of load wires are connected to the positive terminal and the negative terminal of the battery for connection to an electronic device inside the vehicle.

In the present invention, the charging power is input from the generator and the rectifier to the battery via the first output wiring group, and the power supply portion is externally transmitted from the battery via the load wiring, and the battery is provided with a separation buffer between the charging portion and the power supply, when the generator operates. AC voltage will be converted to the first DC by the rectifier The first DC voltage is first transmitted to the battery, so that the DC voltage output by the battery can be made more stable without significant changes as the output voltage of the generator fluctuates.

Referring to FIG. 1 and FIG. 2, the power supply device of the present invention includes: a generator 11 installed in the interior of the vehicle and outputting an alternating voltage when the vehicle is started; and a rectifier 12 connected to the transmitter by a set of input wirings 120 The output end of the motor 11 receives the AC voltage and converts the AC voltage into a first DC voltage, and the first DC voltage is externally outputted from the rectifier 12 via the first output wiring group 21, and the first output wiring group 21 includes There is a positive power line 211 and a negative power line 212; a battery 13 has a positive terminal 131 and a negative terminal 132, the positive terminal 131 is connected to the positive power line 211 of the rectifier 12 to receive the DC voltage, and its negative terminal 132 is the grounding. The negative terminal 132 of the embodiment is connected to the negative power line 212 of the rectifier 12 to achieve the grounding effect. In addition, please refer to FIG. 3, since the frame body of the vehicle is the ground potential, The negative power line 212 can also be connected to the frame body to achieve the same grounding effect; the plurality of load wires 23 are connected to the positive terminal 131 and the negative terminal 132 of the battery 13 for connection to the vehicle. Department of electronic devices.

In the present invention, the charging portion is self-generated from the generator 11 and the rectifier 21 to the battery 13 via the first output wiring group 21, and the power supply portion is externally transmitted from the battery 13 through the load wiring 23, and the charging portion and the power supply portion are separated from each other. The vehicle runs while the generator 11 operates to generate an AC voltage, and the AC voltage is transmitted. The rectifier 12 is turned into a first DC voltage, which is different from the conventional method of directly supplying the load, but a part of the voltage charges the battery 13, and then the output voltage of the battery 13 is via the load wiring 23 And transmitted to the load, therefore, for the load, a relatively stable DC voltage can be obtained by the buffering effect provided by the battery 13, without causing a significant change as the output voltage of the generator 11 fluctuates. Taking a locomotive as an example, the load wiring 23 connected to the battery 13 can be transmitted to an engine controller, a fuel pump, a fuel regulating valve, a fuel nozzle, an engine temperature sensor, an intake air temperature sensor, a throttle valve, and an oxygen sensor. The idle voltage controller, the crystal ignition group, the main power switch lock, the rear lamp group, the headlight group, etc., the voltage value output from the battery 13 can be maintained at a relatively low 14V, compared to the conventional method of receiving power from the rectifier. The load received by the load is a relatively low and stable voltage, so the service life can be relatively extended.

The rectifier 12 of the present invention can provide a second output wiring group 22 in addition to the first output wiring group 21, wherein the second output wiring group 22 provides a second DC voltage, which is slightly lower than the first DC voltage. DC voltage. For example, a step-down element, such as a diode, can be placed at the output of the rectifier 12, and the DC voltage output by the rectifier 12 is reduced by about 0.7 V after passing through the diode. The second DC voltage can also be supplied to the electronic device with less power consumption inside the vehicle depending on the wiring demand.

In the present creation, the current passing through the first output wiring group 21 is larger than the second output wiring group 22. If the voltage outputted via the rectifier 12 further contains an AC component due to incomplete rectification, after being buffered and absorbed by the battery 13, the clean DC voltage can be supplied from the load wiring 23 to the load; because the main wiring of the body of the steam and the locomotive is long. The second output wiring group 22 can supply a long distance The load is powered, and the voltage outputted by the second output wiring group 22 passes through the diode itself, which is a stable DC voltage.

Taking the locomotive test as an example, when the power is not fully supplied to the load (for example, the lamp is not turned on), the current measured from the output wiring 23 connected to the battery 13 is about 2.17 A, and the current of the second output wiring group 22 is rather weak. , about 0.02A. After the load is turned on, the current measured on the output wiring 23 rises to about 4.98 AA, and the current of the second output wiring group 22 also increases to 0.27 A.

Referring to FIG. 4 and FIG. 5 again, another preferred embodiment of the present invention is different from the foregoing first embodiment in that a fuse 14 is further connected between the rectifier 12 and the battery 13 when the rectifier 12 or the battery 13 is connected. When either one fails, the fuse 14 can cut off the circuit between the two to protect the other side. For example, when the rectifier 12 abnormally generates a high current, the fuse 14 automatically interrupts the circuit to protect the battery 13 from the large one. In the same way, when the battery 13 is abnormal and draws a large current, the fuse 14 automatically interrupts the circuit to protect the rectifier 12.

Referring to Figures 6 and 7, the embodiment further includes a relay 15 having a contact connected to the output of the rectifier 12 and the positive terminal 131 of the battery 13, and the other contact of the relay 15 is A starter motor 16 for connection to a vehicle. The fuse 14 can be disposed between the relay 15 and the output of the rectifier 12.

In summary, the present invention combines the generator 11, the rectifier 12 and the battery 13 in parallel, and then the DC voltage is output from the battery 13 to the electronic device inside the vehicle. By the relaxation of the battery 13, the AC voltage instability can be reduced. The resulting voltage change allows the electronic device to accept a stable DC voltage. This method of separating charging and power supply can prevent abnormal operation of the device. Rectifier 12 can also directly provide a smaller second DC voltage, which can be supplied to other electronic devices with low power consumption requirements inside the vehicle.

In the foregoing embodiments, the present invention has been described as being applied to the interior of a rolling stock as a preferred embodiment, and may be applied to an automobile vehicle in addition to the above. As shown in FIG. 8 , in the automobile as an example, a generator 11 and a rectifier 12 are also disposed inside the vehicle engine block 30. After the AC power generated by the generator 11 is converted into a DC power source via the rectifier 12, the battery is also first applied. 13 is charged, and power is supplied from the battery 13 to the electronic components in the vehicle. The negative terminal 132 of the battery 13 can be connected to the vehicle body, and the negative pole of the rectifier 12 is also connected to the vehicle body to achieve the same grounding effect.

11‧‧‧Generator

12‧‧‧Rectifier

120‧‧‧Input wiring

13‧‧‧Battery

131‧‧‧ positive terminal

132‧‧‧Negative terminal

14‧‧‧Fuse

15‧‧‧Relay

16‧‧‧Starter motor

21‧‧‧First output wiring set

211‧‧‧ positive power cord

212‧‧‧Negative power cord

22‧‧‧Second output wiring set

23‧‧‧Load wiring

30‧‧‧Engine Group

41‧‧‧Generator

42‧‧‧Rectifier

43‧‧‧Output power supply

Fig. 1: Schematic diagram of the wiring of the first embodiment of the power supply device of the present invention.

Fig. 2 is a perspective view showing the first embodiment of the power supply device of the present invention.

Fig. 3 is a perspective view showing the second embodiment of the power supply device of the present invention.

Fig. 4 is a wiring diagram of a third embodiment of the power supply device of the present invention.

Fig. 5 is a perspective view showing the third embodiment of the power supply device of the present invention.

Fig. 6 is a wiring diagram of a fourth embodiment of the present vehicle power supply device.

Fig. 7 is a perspective view showing the fourth embodiment of the power supply device of the present invention.

Figure 8: Schematic diagram of the application of the vehicle power supply device to an automobile vehicle.

Figure 9: Block diagram of the circuit wiring of the existing vehicle power supply unit.

11‧‧‧Generator

12‧‧‧Rectifier

13‧‧‧Battery

211‧‧‧ positive power cord

212‧‧‧Negative power cord

22‧‧‧Second output wiring set

23‧‧‧Load wiring

Claims (8)

A vehicle power supply device with stable generator power output includes: a generator installed in the vehicle and outputting an alternating voltage; a rectifier connected to the output end of the generator to receive the alternating voltage, and the rectifier converts the alternating voltage Outputting the first DC voltage from an output terminal for a first DC voltage; a battery having a positive terminal and a negative terminal, the positive terminal being connected to the output of the rectifier to receive the first DC voltage, the negative terminal being Grounding; a plurality of load wirings connected to the positive and negative terminals of the battery for connection to electronic devices inside the vehicle. The vehicle power supply device with stable generator power output according to claim 1, wherein the output end of the rectifier is provided with a first output wiring group, the first output wiring group includes a positive power line and a negative power line, and the positive power supply The line and the negative power line are respectively connected to the positive terminal and the negative terminal of the battery. The vehicle power supply device with stable generator power output according to claim 1, wherein the output end of the rectifier is provided with a first output wiring group, the first output wiring group includes a positive power line and a negative power line, and the positive power supply The wire is connected to the positive terminal of the battery, and the negative power line is connected to the vehicle body. The vehicle power supply device with a stable generator power supply output according to any one of claims 1 to 3, wherein the output end of the rectifier is connected to a second output wiring group through a step-down component, and the second output wiring group outputs a first a DC voltage, wherein the second DC voltage is less than the first DC voltage. Vehicle power supply with stable generator power output as described in claim 4 The device, the buck element is a diode. The vehicle power supply device with stable generator power output according to claim 5, further comprising a relay, a contact of the relay is connected to the output end of the rectifier and the positive terminal of the battery, and the other contact of the relay is connected To the starter motor of the vehicle. A power supply device for a vehicle having a stable generator power output as claimed in claim 5, wherein a fuse is connected in series between the rectifier and the battery. The vehicle power supply device with stable generator power output as claimed in claim 6 has a fuse connected in series between the output end of the rectifier and the relay.