TW201914365A - Power supply - Google Patents

Abstract

A power supply provides power to a lamp disposed on a motorcycle and comprises a first voltage-current converter, a second voltage-current converter and a protection module. The first voltage-current converter converts a battery voltage into a first output current. The second voltage-current converter converts the battery voltage into a second output current. The protection module receives the first output current and provides a driving current to the lamp according to the voltage of the lamp. When the voltage of the lamp is less than a pre-determined value, the protection module reduces the first output current to generate a decayed current and provides the decayed current as the driving current. When the voltage of the lamp does not less than the pre-determined value, the protection module directly provides the first output current as the driving current.

Description

 Power Supplier  

The present invention relates to a power supply, and more particularly to a power supply for use in a motorcycle interior.

Luminaires can be said to be an important component of a general vehicle. Taking motorcycles as an example, motorcycles usually have headlights, left and right direction lights, tail lights, and brake lights. Since the luminaires of motorcycles are usually halogen bulbs, the power required is mostly the same. However, halogen bulbs are more power hungry and easier to burn. Therefore, users need to replace the halogen bulb frequently.

The invention provides a power supply device for use in a motorcycle for supplying power to a first lamp in the motorcycle, and comprising a first voltage-current converter, a second voltage-current converter and a The first protection module. The first voltage-to-current converter converts a battery voltage to generate a first output current. The second voltage-to-current converter converts the battery voltage to generate a second output current. The first protection module receives the first output current and provides a first drive current to the first luminaire according to the voltage of the first luminaire. When the voltage of the first luminaire is less than a first preset value, the first protection module reduces the first output current for generating a first fading current and using the first fading current as the first driving current. When the voltage of the first luminaire is not less than the first preset value, the first protection module directly uses the first output current as the first driving current.

100‧‧‧ motorcycle

110‧‧‧Generator

120‧‧‧Rectifier

130‧‧‧Fuse

140‧‧‧Battery

150‧‧‧ switch

160‧‧‧Power supply

170, 180‧‧‧ lamps

V _B ‧‧‧Battery voltage

I ₁ ~I ₃ ‧‧‧ drive current

GND‧‧‧ ground terminal

221~223‧‧‧protection module

O ₁ ~O ₃ ‧‧‧Output current

310‧‧‧Detection circuit

320‧‧‧Control circuit

V _LED ‧‧‧ voltage

S _DET ‧‧‧Detection signal

171~175, 181~183‧‧‧Lighting diode

211~213‧‧‧Voltage-to-current converter

Figure 1 is a schematic view of an application of the power supply of the present invention.

Figure 2 is a possible embodiment of the power supply of the present invention.

Figure 3 is a schematic view of the protection module of the present invention.

In order to make the objects, features and advantages of the present invention more comprehensible, the embodiments of the invention are described in detail below. The present specification provides various embodiments to illustrate the technical features of various embodiments of the present invention. The arrangement of the various elements in the embodiments is for illustrative purposes and is not intended to limit the invention. In addition, the overlapping portions of the drawings in the embodiments are for the purpose of simplifying the description, and do not mean the relationship between the different embodiments.

Figure 1 is a schematic view of an application of the power supply of the present invention. The power supply of the present invention is applied to a motorcycle 100. Although FIG. 1 shows only elements related to the present invention, it is not intended to limit the present invention. The motorcycle 100 still has other hardware components or software that controls the hardware, and will not be described herein.

As shown, the motorcycle 100 includes at least a generator 110, a rectifier 120, a fuse 130, a battery 140, a switch 150, a power supply 160, and luminaires 170, 180. Generator 110 produces electrical power to rectifier 120. The rectifier 120 converts the greatly variable power into a stable power and outputs stable power for charging the battery 140. In the present embodiment, the fuse 130 is disposed between the rectifier 120 and the battery 140 to prevent excessive power from entering the battery 140.

The switch 150 is coupled between the battery 140 and the power supply 160 for transmitting the battery voltage V _B provided by the battery 140 to the power supply 160. In a possible embodiment, the switch 150 is a key switch for a motorcycle. When the user inserts the key into the key switch of the motorcycle and rotates the key switch, the switch 150 is turned on. At this time, the power supply 160 converts the battery voltage V _B to generate a complex drive current. For convenience of explanation, FIG. 1 shows driving currents I ₁ to I ₃ , but is not intended to limit the present invention. In other embodiments, the power supply 160 may generate two drive currents or more drive current.

The present invention does not limit the relationship between the drive currents I ₁ to I ₃ . In a possible embodiment, the drive currents I ₁ ~I ₃ are equal. In another possible embodiment, the drive currents I ₁ ~I _{3 are all} different. In other embodiments, ₁ ~ I ₃ is at least one of the driving current I is different from the other of the drive current I of ₁ ~ I _3.

The luminaire 170 emits light according to the drive currents I ₁ and I ₂ . The invention does not limit the type of luminaire 170. In a possible embodiment, the luminaire 170 may be a headlight, a left directional light, a right directional light, a tail light, a brake light, etc. of a motorcycle. In the present embodiment, the light fixture 170 includes light emitting diodes 171-175. The light emitting diodes 171 to 175 are connected in series between the power supply 160 and the ground GND. The invention does not limit the number of light emitting diodes of the luminaire 170. In other embodiments, the luminaire 170 may have more or fewer light emitting diodes. In the present embodiment, the luminaire 170 has a single illuminating diode string, but is not intended to limit the invention. In other embodiments, the luminaire 170 may have a plurality of light emitting diode strings that are connected in parallel with one another.

The lamps 180 emitting driving current I _3. The invention does not limit the type of luminaire 180. In a possible embodiment, the luminaire 180 may be a headlight, a left directional light, a right directional light, a tail light, a brake light, etc. of the motorcycle. In the present embodiment, the light fixture 180 includes light emitting diodes 181 to 183. The light emitting diodes 181 to 183 are connected in series between the power supply 160 and the ground GND. The invention does not limit the number of light emitting diodes of the luminaire 180. In other embodiments, the luminaire 180 may have more or fewer light emitting diodes. In the present embodiment, the luminaire 180 has a single illuminating diode string, but is not intended to limit the invention. In other embodiments, the luminaire 180 may have a plurality of light emitting diode strings that are connected in parallel with one another.

In the present embodiment, the power supply 160 provides drive currents I ₁ and I ₂ to the luminaire 170, but is not intended to limit the invention. In other embodiments, if the driving current I ₁ is large enough, enough to drive the lamp 170, the power supply 160 only provides the driving current I ₁ to the lamp 170. In this example, drive current I ₂ can be used to drive another luminaire (not shown).

In order to provide a suitable drive current to the corresponding luminaire, in a possible embodiment, the power supply 160 has a selector (not shown) with the luminaires 170, 180. The selector selects a suitable driving current from the driving currents I ₁ to I ₃ to the lamps 170 and 180 according to a set value, which is set in advance by the designer. For example, since the number of the light emitting diodes of the lamp 170 is greater than the number of the light emitting diodes of the lamp 180, the setting person may cause the selector to output the driving currents I ₁ and I ₂ to the lamp 170 through the set value. If the driving currents I ₁ and I _{2 are} insufficient to drive the lamp 170, the setting person may cause the selector to output the driving currents I ₁ to I ₃ to the lamp 170 through the set value.

In a possible embodiment, the power supply 160 is disposed below a dashboard (not shown) of the motorcycle. In another possible embodiment, the power supply 160 is located above a front wheel of the motorcycle. In other embodiments the power supply 160 is disposed adjacent to the headlights.

Figure 2 is a possible embodiment of the power supply of the present invention. As shown, the power supply 160 includes voltage-current converters 211 to 213 and protection modules 221 to 223. The voltage-current converter 211 converts the battery voltage V _B to generate an output current O ₁ . The voltage-to-current converter 212 converts the battery voltage V _B to generate an output current O ₂ . The voltage-to-current converter 213 converts the battery voltage V _B to generate an output current O ₃ . The invention does not limit the number of voltage to current converters. In other embodiments, the power supply 160 may have two voltage-to-current converters or more voltage-to-current converters. In this embodiment, the output currents O ₁ to O ₃ are all fixed currents.

The protection module 221 receives the output current O ₁ and provides a drive current I ₁ to the lamp 170 according to the voltage of the lamp 170. For example, when the voltage of the lamp 170 is less than a first preset value, the protection module 221 lowers the output current O ₁ to generate an attenuation current, and supplies the attenuation current to the lamp 170 as the driving current I ₁ . However, when the voltage of the luminaire 170 is not less than the first preset value, the protection module 221 directly supplies the output current O ₁ as the drive current I ₁ to the luminaire 170. The present invention does not limit how the protection module 221 reduces the output current O ₁ . In a possible embodiment, when the voltage of the lamp 170 is less than the first preset value, the protection module 221 subtracts a first current value from the output current O ₁ to generate a first attenuation current and output the first The current is attenuated to the luminaire 170. When the voltage of the lamp 170 continued to decrease and less than a second predetermined value, the output current protection module 221 O ₁ minus a second current value, for generating a second current attenuation, and outputting a second attenuated current I Lamp 170. In this example, the second current value is greater than the first current value. In addition, the second preset value is smaller than the first preset value. In other embodiments, when the voltage of the luminaire 170 continues to decrease and is less than a third predetermined value, the protection module 221 may stop providing the driving current I ₁ to the luminaire 170 to prevent the luminaire 170 from being burned.

The protection module 222 receives the output current O ₂ and provides a drive current I ₂ to the lamp 170 according to the voltage of the lamp 170. The protection module 223 receives the output current O ₃ and provides a drive current I ₃ to the luminaire 180 according to the voltage of the luminaire 180. Since the operation principles of the protection modules 222 and 223 are the same as those of the protection module 221, they will not be described again. The invention does not limit the number of protection modules. In a possible embodiment, the number of protection modules is equal to the number of voltage-to-current converters.

Figure 3 is a schematic view of the protection module of the present invention. Since the internal circuit structures of the protection modules 221 to 223 are the same, FIG. 3 only lists the internal architecture of the protection module 221. As shown, the protection module 221 includes a detection circuit 310 and a control circuit 320. The detecting circuit 310 detects the voltage V _{LED of the} lamp 170 for generating a detecting signal S _DET . In this embodiment, the voltage V _LED is the voltage difference between the node 330 and the ground GND. As the temperature of the luminaire 170 increases, the voltage V _LED becomes smaller. Therefore, by detecting the voltage V _LED , the temperature of the lamp 170 can be known. In a possible embodiment, the detection circuit 310 is a voltage detector.

The control circuit 320 receives the output current O ₁ and determines whether to adjust the output current O ₁ according to the detection signal S _DET . For example, when the voltage V _{LED is} not less than a first preset value, it indicates that the temperature of the lamp 170 is normal. Therefore, the protection module 221 directly supplies the output current O ₁ to the lamp 170 as the drive current I ₁ . When the voltage V _{LED is} less than the first preset value, it indicates that the temperature of the lamp 170 is too high. Therefore, the control circuit 320 reduces the output current O ₁ and supplies the reduced current as the drive current I ₁ to the lamp 170 for reducing the temperature of the lamp 170.

However, when the voltage V _{LED is} less than a second predetermined value, it indicates that the temperature of the lamp 170 is higher. Therefore, the control circuit 320 further reduces the output current O ₁ and supplies the reduced current to the lamp 170 as the drive current I ₁ . In this embodiment, when the voltage V _LED is smaller than a second predetermined value, the output current is greater than O ₁ when the rate of decrease is less than a first predetermined value, current output O ₁ reduced amplitude voltage V _LED.

The invention does not limit how the control circuit 320 reduces the output current O ₁ . For example, when the voltage of the luminaire 170 is less than the first preset value, the control circuit 320 subtracts the output current O _{1 from} a first current value to generate a first fading current, and outputs the first fading current to the luminaire. 170. When the voltage of the lamp 170 continued to decrease and less than a second predetermined value, the control circuit 320 subtracts the output current of the O ₁ a second current value, for generating a second current decay, and outputs the second attenuated lamp current I 170. In this example, the second current value is greater than the first current value. In addition, the second preset value is smaller than the first preset value. In other embodiments, the lamp 170 when the voltage is less than a continued decrease and a third predetermined value, the control circuit 320 may stop the driving current I ₁ is provided to the lamp 170, the lamp 170 in order to avoid burning. In this example, the third preset value is less than the second preset value.

Since the power supply 160 can generate multiple current outputs, multiple sets of luminaires in the motorcycle can be simultaneously driven. When a certain luminaire requires a large amount of power, the power supply 160 can integrate multiple currents into a single large current, and then supply a large current to the luminaire. Since the power supply 160 is drivable, the use flexibility is high.

Unless otherwise defined, all terms (including technical and scientific terms) are used in the ordinary meaning Moreover, unless expressly stated, the definition of a vocabulary in a general dictionary should be interpreted as consistent with the meaning of an article in its related art, and should not be interpreted as an ideal state or an overly formal voice.

Although the present invention has been disclosed in the above preferred embodiments, it is not intended to limit the invention, and any one of ordinary skill in the art can make some modifications and refinements without departing from the spirit and scope of the invention. . For example, the system, apparatus or method of the embodiments of the present invention may be implemented in a physical embodiment of a combination of hardware, software or hardware and software. Therefore, the scope of the invention is defined by the scope of the appended claims.

Claims (10)

 A power supply for use in a motorcycle for supplying power to a first luminaire in the motorcycle, and comprising: a first voltage-current converter for converting a battery voltage for generating a first output a second voltage-current converter that converts the battery voltage to generate a second output current; and a first protection module that receives the first output current and provides a voltage according to the voltage of the first lamp The first driving current is applied to the first lamp, wherein when the voltage of the first lamp is less than a first preset value, the first protection module reduces the first output current to generate a first attenuation current, and The first attenuation current is used as the first driving current. When the voltage of the first lamp is not less than the first preset value, the first protection module directly uses the first output current as the first driving current.    The power supply of claim 1, wherein the first output current is different from the second output current.    The power supply of claim 1, wherein the first output current is the same as the second output current.    The power supply device of claim 1, further comprising: a second protection module, receiving the second output current, and providing a second driving current according to a voltage of a second lamp in the motorcycle For the second luminaire, when the voltage of the second luminaire is less than a second preset value, the second protection module reduces the second output current for generating a second attenuation current, and the second The second current protection module directly uses the second output current as the second driving current when the voltage of the second lamp is not less than the second preset value.    The power supply of claim 1, wherein the first light fixture has at least one light emitting diode.    The power supply of claim 1, wherein the first output current is a fixed current.    The power supply of claim 1, wherein the battery voltage is provided by a battery in the motorcycle.    The power supply of claim 1, wherein the power supply is disposed under a dashboard of the motorcycle, and the power supply is located above a front wheel of the motorcycle.    The power supply device of claim 1, wherein the first protection module comprises: a detection circuit for detecting a voltage of the first lamp for generating a detection signal; and a control circuit, Receiving the first output current, and determining whether to adjust the first output current according to the detection signal.    The power supply device of claim 1, wherein the first protection module subtracts the first current value from the first current value when the voltage of the first lamp is less than the first preset value When the voltage of the first luminaire is less than a second preset value, the first protection module subtracts a second current value from the first output current, where the first current value is less than the second current value, The first preset value is higher than the second preset value.