Electric two-wheeled vehicle light control circuit
阅读说明：本技术 一种电动两轮车灯光控制电路 (Electric two-wheeled vehicle light control circuit ) 是由 苏晓聪 朱敦尧 张俊 潘兵 陈程 雷继光 胡龑 彭宝剑 华登科 于 2020-06-24 设计创作，主要内容包括：本发明涉及电动车电路控制技术领域,尤其涉及一种电动两轮车灯光控制电路；包括电阻R3、R7、R14、R15、第二二极管、第四三极管和PMOS管,组成MOS管驱动电路；R14一端连接Light_Control端,R14另一端连接第二二极管阳极；第二二极管阴极连接所述第四三极管基极；第四三极管发射极连接到R15一端；R15另一端连接到第二二极管阳极；第四三极管集电极分别连接到R7一端和PMOS管G极；R7另一端连接R3一端,R3另一端连接PMOS管S极；PMOS管D极分别连接第一转向灯和第二转向灯；所述第一转向灯和第二转向灯并联；本发明实施例通过组成MOS管驱动电路,PMOS管根据高低电平来控制电动两轮车的前后转向灯的灯光开关,避免因开关的老化产生接触不稳定的现象,造成灯光异常闪烁等问题。(The invention relates to the technical field of electric vehicle circuit control, in particular to a light control circuit of an electric two-wheeled vehicle; the MOS transistor driving circuit comprises resistors R3, R7, R14, R15, a second diode, a fourth triode and a PMOS (P-channel metal oxide semiconductor) transistor, and an MOS transistor driving circuit is formed; one end of R14 is connected with the Light _ Control end, and the other end of R14 is connected with the anode of the second diode; the cathode of the second diode is connected with the base of the fourth triode; the emitter of the fourth triode is connected to one end of the R15; the other end of R15 is connected to the anode of the second diode; the collector of the fourth triode is respectively connected to one end of the R7 and the G pole of the PMOS tube; the other end of R7 is connected with one end of R3, and the other end of R3 is connected with the S pole of a PMOS tube; the D pole of the PMOS tube is respectively connected with the first steering lamp and the second steering lamp; the first steering lamp and the second steering lamp are connected in parallel; according to the embodiment of the invention, the MOS tube driving circuit is formed, and the PMOS tube controls the light switches of the front and rear steering lamps of the electric two-wheeled vehicle according to the high and low levels, so that the problems of abnormal flicker of light and the like caused by unstable contact due to aging of the switches are avoided.)
1. A light control circuit of an electric two-wheeled vehicle is characterized by comprising resistors R3, R7, R14, R15, a second diode, a fourth triode and a PMOS (P-channel metal oxide semiconductor) transistor, wherein an MOS (metal oxide semiconductor) transistor driving circuit is formed; the fourth triode is an NPN triode; one end of the R14 is connected with a Light _ Control end, and the other end of the R14 is connected with the anode of a second diode; the cathode of the second diode is connected with the base of the fourth triode; the emitter of the fourth triode is connected to one end of R15; the other end of the R15 is connected to the anode of the second diode; the collector of the fourth triode is respectively connected to one end of the R7 and the G pole of the PMOS tube; the other end of the R7 is connected with one end of the R3, and the other end of the R3 is connected with the S pole of the PMOS tube; the D pole of the PMOS tube is respectively connected with a first steering lamp and a second steering lamp; the first steering lamp and the second steering lamp are connected in parallel.
2. The light control circuit for electric bicycle according to claim 1, wherein in the MOS transistor driving circuit, one end of the resistor R3 is connected to one end of the resistor R4, and the other end of the resistor R4 is connected to one end of the resistor R1 and the non-inverting input end of the operational amplifier; the other end of the R3 is connected with one end of the R6, and the other end of the R6 is respectively connected with one end of the R10 and the inverting input end of the operational amplifier; the output end of the operational amplifier is respectively connected with the other end of the R10 and one end of the R5; the other end of the R5 is respectively connected with one end of the R8 and the Current _ detect end to form a Current sampling amplifying circuit.
3. The light control circuit of claim 2, wherein in the current sampling and amplifying circuit, the output end of the operational amplifier is connected with one end of R12; the other end of the R12 is respectively connected with one end of the R11, one end of the R13 and a base electrode of the second triode; the second triode is an NPN triode; the other end of the R11 is connected with the collector of the first triode; the first triode is a PNP triode; the first triode emission set is respectively connected with one end of R2 and one end of R3; the other end of the R2 is respectively connected with one end of the R9 and the base of the first triode; the other end of the R9 is respectively connected with the collector of the second triode and the cathode of the first diode; the second triode emission set is connected with the other end of the R13; and the anode of the first diode is connected with the anode of a second diode in the MOS tube driving circuit to form an over-current protection circuit.
Technical Field
The invention relates to the technical field of electric vehicle circuit control, in particular to a light control circuit of an electric two-wheeled vehicle.
Background
With the heat of the urban wisdom trip concept, the two-wheeled electric vehicle market is continuously developed, the market scale reaches billions of yuan, and each large two-wheeled electric vehicle factory also successively puts forward high-end series of vehicle types. High-end series electric vehicles put higher requirements on the reliability and safety of various peripheral control and have some hard requirements by relevant regulations of the European Union.
At present, a light control circuit of an electric bicycle is simple, as shown in figure 1, a front steering lamp and a rear steering lamp are connected in parallel, and mechanical switch control is adopted.
Disclosure of Invention
In order to overcome the defects of the prior art, the embodiment of the invention provides the light control circuit of the electric two-wheel vehicle, which solves the problems of abnormal flicker of light and the like caused by aging of a switch.
A light control circuit of an electric two-wheeled vehicle comprises resistors R3, R7, R14, R15, a second diode, a fourth triode and a PMOS (P-channel metal oxide semiconductor) transistor, and an MOS (metal oxide semiconductor) transistor driving circuit is formed; the fourth triode is an NPN triode; one end of the R14 is connected with a Light _ Control end, and the other end of the R14 is connected with the anode of a second diode; the cathode of the second diode is connected with the base of the fourth triode; the emitter of the fourth triode is connected to one end of R15; the other end of the R15 is connected to the anode of the second diode; the collector of the fourth triode is respectively connected to one end of the R7 and the G pole of the PMOS tube; the other end of the R7 is connected with one end of the R3, and the other end of the R3 is connected with the S pole of the PMOS tube; the D pole of the PMOS tube is respectively connected with a first steering lamp and a second steering lamp; the first steering lamp and the second steering lamp are connected in parallel.
In the MOS tube driving circuit, one end of the resistor R3 is connected with one end of the R4, and the other end of the resistor R4 is respectively connected with one end of the R1 and the non-inverting input end of the operational amplifier; the other end of the R3 is connected with one end of the R6, and the other end of the R6 is respectively connected with one end of the R10 and the inverting input end of the operational amplifier; the output end of the operational amplifier is respectively connected with the other end of the R10 and one end of the R5; the other end of the R5 is respectively connected with one end of the R8 and the Current _ detect end to form a Current sampling amplifying circuit.
In the current sampling amplifying circuit, the output end of the operational amplifier is connected with one end of R12; the other end of the R12 is respectively connected with one end of the R11, one end of the R13 and a base electrode of the second triode; the base of the second triode is an NPN triode; the other end of the R11 is connected with the collector of the first triode; the first triode is a PNP triode; the first triode emission set is respectively connected with one end of R2 and one end of R3; the other end of the R2 is respectively connected with one end of the R9 and the base of the first triode; the other end of the R9 is respectively connected with the collector of the second triode and the cathode of the first diode; the second triode emission set is connected with the other end of the R13; and the anode of the first diode is connected with the anode of a second diode in the MOS tube driving circuit to form an over-current protection circuit.
The embodiment of the invention provides a light control circuit of an electric two-wheeled vehicle, which is characterized in that an MOS tube driving circuit is formed, and a PMOS tube controls light switches of front and rear steering lamps of the electric two-wheeled vehicle according to high and low levels, so that the problems of abnormal flicker of light and the like caused by unstable contact due to aging of the switches are avoided; the Current sampling amplifying circuit is used for amplifying the sampling Current and converting the sampling Current into voltage to be output, and the difference of the Current _ detect terminal voltage can be used for detecting the quality of the front and rear steering lamps, so that the reliability of the electric two-wheeled vehicle can be effectively improved; detecting load current through an overcurrent protection circuit, and when the load current is greater than a set threshold value, enabling the PMOS to be in an overcurrent protection closing state consistently, and powering up again to recover; the over-current protection function is realized by a hardware circuit sampling mode, the response time is short, and the safety is high.
Drawings
In order to more clearly illustrate the technical solution of the present invention, the drawings needed to be used in the technical description of the present invention will be briefly introduced below, and it is apparent that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without inventive labor.
Fig. 1 is a schematic view of a light control circuit of an electric two-wheeled vehicle according to an embodiment of the invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Fig. 1 is a schematic view of a light control circuit of an electric two-wheeled vehicle according to an embodiment of the invention. As shown in fig. 1, a light control circuit of an electric two-wheeled vehicle comprises resistors R3, R7, R14, R15, a second diode D2, a fourth triode Q4 and a PMOS transistor Q3, which form a MOS transistor driving circuit; the fourth triode Q3 is an NPN triode; one end of the R14 is connected with a Light _ Control end, and the other end of the R14 is connected with the anode of a second diode D2; the cathode of the second diode D2 is connected with the base of the fourth triode Q4; the emitter of the fourth triode Q4 is connected to one end of R15; the other end of the R15 is connected to the anode of the second diode D2; the collector of the fourth triode Q4 is respectively connected to one end of the R7 and the pole of the PMOS transistor Q3G; the other end of the R7 is connected with one end of the R3, and the other end of the R3 is connected with the pole of the PMOS tube Q3S; the poles of the PMOS tube Q3D are respectively connected with a first steering lamp LED1 and a second
The embodiment of the invention provides a light control circuit of an electric two-wheeled vehicle, which is characterized in that a MOS tube driving circuit is formed, and a PMOS tube controls light switches of front and rear steering lamps of the electric two-wheeled vehicle according to high and low levels, so that the problems of abnormal flicker of light and the like caused by unstable contact due to aging of the switches are avoided.
In the MOS transistor driving circuit, one end of the resistor R3 is connected to one end of the resistor R4, and the other end of the resistor R4 is connected to one end of the resistor R1 and the non-inverting input end of the operational amplifier, respectively; the other end of the R3 is connected with one end of the R6, and the other end of the R6 is respectively connected with one end of the R10 and the inverting input end of the operational amplifier; the output end of the operational amplifier is respectively connected with the other end of the R10 and one end of the R5; the other end of the R5 is respectively connected with one end of the R8 and the Current _ detect end to form a Current sampling amplifying circuit. Wherein R1, R3, R4, R5, R6, R8 and R10 can be adjusted according to the magnitude of rated load current; in the embodiment of the invention, R1 and R10 are preferably 56K omega, R4 and R6 are preferably 1K omega, R5 is 30K omega, R8 is 10K omega, and the model of an operational amplifier is LM258 DR; the R1, the R4, the R6, the R10 and the operational amplifier U1A form a differential amplification circuit which amplifies the sampling current (I) and converts the sampling current (I) into a voltage (V) to be output, and the I/V conversion relation is V-I-R3 (R10/R6); the resistors R5 and R8 form a voltage division network, and the maximum output voltage of the operational amplifier is attenuated to the range acceptable by the MCU. Assuming that the working Current of the steering lamp is 200mA, and the terminal voltage of the Current _ detect is 1.12V when the two lamps work normally; when one lamp is broken and only one lamp works normally, the terminal voltage of the Current _ detect is 0.56V; when two lamps are damaged, the Current _ detect voltage is about 0.27V (because an operational amplifier which is not output from a rail to a rail is selected, the minimum output voltage of the operational amplifier is about 1.1V under the condition of 12V-0V power supply of the operational amplifier, and the Current is 0A, the Current _ detect voltage is not 0); the operational amplifier U1A is supplied with power by 12V, and the output is attenuated by a resistance voltage division mode, so that the influence on the circuit when the nonlinear output of the non-rail-to-rail output operational amplifier is effectively reduced; the quality of the lamp can be detected through the difference of the terminal voltage of the Current _ detect, and the reliability of the electric two-wheel vehicle can be effectively improved.
Furthermore, in the current sampling amplifying circuit, the output end of the operational amplifier is connected with one end of R12; the other end of the R12 is respectively connected with one end of the R11, one end of the R13 and the base electrode of the second triode Q2; the second triode Q2 is an NPN triode; the other end of the R11 is connected with the collector of a first triode Q1; the first triode Q1 is a PNP triode; the emitting set of the first triode Q1 is respectively connected with one end of R2 and one end of R3; the other end of the R2 is respectively connected with one end of the R9 and the base electrode of the first triode Q1; the other end of the R9 is respectively connected with the collector of the second triode Q2 and the cathode of a first diode D1; the emission set of the second triode Q2 is connected with the other end of the R13; and the anode of the first diode D1 is connected with the anode of a second diode D2 in the MOS tube driving circuit to form an overcurrent protection circuit. Wherein, R2, R9, R11, R12 and R13 can be adjusted according to the magnitude of rated load current; in the embodiment of the invention, preferably, R2 and R13 are 10K Ω, R9, R12 and R11 are 100K Ω, and the model of the first diode D1 is 1N 4148; according to the circuit parameter calculation in fig. 1, it is set that when the load current I is greater than 590mA, the base stage voltage V of the second transistor Q2 is I × R3 (R10/R6) × R13/(R12+ R13) is 0.6V, and the second transistor Q2 is turned on; at this time, the base of the fourth transistor Q4 is pulled low, the fourth transistor Q4 is turned off, and the PMOS transistor Q3 is turned off. When the second triode Q2 is turned on, the first triode Q1 is also turned on, so that the base level of the second triode Q2 is locked at a high level, the PMOS transistor Q3 is in an overcurrent protection closed state consistently, and the recovery can be realized only by electrifying again; the over-current protection function is realized by a hardware circuit sampling mode, the response time is short, and the safety is high.
Meanwhile, the overcurrent protection circuit and the MOS tube driving circuit are isolated by using the first diode D1, so that the adjustment of the static parameters of partial circuits is not influenced by each other; when the second triode Q2 in the overcurrent protection circuit is conducted, the second diode D2 is added in series to the base stage of the fourth triode Q4 in the MOS tube driving circuit, so that the influence of the voltage drop of the first diode D1 in the overcurrent protection circuit on the MOS tube driving circuit is eliminated.
The embodiment of the invention provides a light control circuit of an electric two-wheeled vehicle, which is characterized in that an MOS tube driving circuit is formed, and a PMOS tube controls light switches of front and rear steering lamps of the electric two-wheeled vehicle according to high and low levels, so that the problems of abnormal flicker of light and the like caused by unstable contact due to aging of the switches are avoided; the Current sampling amplifying circuit is used for amplifying the sampling Current and converting the sampling Current into voltage to be output, and the difference of the Current _ detect terminal voltage can be used for detecting the quality of the front and rear steering lamps, so that the reliability of the electric two-wheeled vehicle can be effectively improved; detecting load current through an overcurrent protection circuit, and when the load current is greater than a set threshold value, enabling the PMOS to be in an overcurrent protection closing state consistently, and powering up again to recover; the over-current protection function is realized by a hardware circuit sampling mode, the response time is short, and the safety is high.
Although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Through the above description of the embodiments, those skilled in the art will clearly understand that each embodiment can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware. With this understanding in mind, the above-described technical solutions may be embodied in the form of a software product, which can be stored in a computer-readable storage medium such as ROM/RAM, magnetic disk, optical disk, etc., and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the methods described in the embodiments or some parts of the embodiments.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
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