An electric bicycle instrument driving circuit

Abstract

The utility model discloses a kind of drive circuits, belong to electric bicycle instrument technical field, specifically related to a kind of electric bicycle instrument drive circuit, comprising: conversion module, output filter and high voltage surge suppression module;Output filter and high voltage surge suppression module are connected with conversion module;Conversion module includes: MOS tube Q6, MOS tube Q9, resistance R20, resistance R19, resistance R18, triode Q5 and triode Q10;Output filter includes: inductance L2, electrolytic capacitor C15, electrolytic capacitor C14, capacitor C13;High voltage surge suppression module includes: transient voltage suppression diode D5;The utility model uses wide input voltage range, high-efficiency switching power supply, replaces traditional linear voltage stabilizer, and efficiency is higher, and heat is smaller, and tolerance to input voltage fluctuation is better, while increasing greater capacity input electrolytic capacitor, effectively absorb transient surge and fill transient voltage drop, in addition, TVS diode is used to suppress high voltage surge, and self-recovery fuse is used to prevent overcurrent.

Description

Technical Field

[0001] This utility model belongs to the field of electric bicycle instrument technology, specifically relating to an electric bicycle instrument drive circuit. Background Technology

[0002] Urban traffic congestion has been a widespread problem in most cities across China in recent years. Although road conditions have been improving, they are far from keeping pace with the increase in the number of vehicles. Getting stuck in traffic while driving or taking public transportation to and from work is a daily experience for almost everyone. Despite the differences in comfort when riding electric bikes, especially in the hot summer and cold winter, more and more people are choosing electric bikes to save time. Electric bikes also have the advantages of being inexpensive, easy to store, and flexible. It is reported that the number of electric bicycles in China has now exceeded 200 million.

[0003] As an information interaction display platform between electric vehicles and drivers, the electric vehicle dashboard is a high-tech product that adapts to the digital and information-based development of electric vehicles. It is responsible for displaying real-time information such as indicator light status, driving speed, fault alarms, as well as battery data such as power supply voltage, current, and power level.

[0004] However, the battery voltage of traditional electric bicycles fluctuates significantly when starting, accelerating, or braking (surges, drops).

[0005] Low-cost linear regulators or poorly designed switching power supplies can lead to the following:

[0006] 1. The instrument screen suddenly goes black or restarts (voltage drops too low).

[0007] 2. Display error or garbled characters (voltage instability interferes with MCU).

[0008] 3. The voltage regulator chip overheats or is even damaged (the linear regulator is inefficient when the input-output voltage difference is large). Utility Model Content

[0009] Purpose of the utility model: To provide a drive circuit for the instrument panel of an electric bicycle, and to solve the problems mentioned above.

[0010] Technical solution: A drive circuit for an electric bicycle instrument panel, the drive circuit comprising: a conversion module, an output filter, and a high-voltage surge suppression module;

[0011] The output filter and the high-voltage surge suppression module are connected to the conversion module;

[0012] The conversion module includes: MOSFET Q6, MOSFET Q9, resistor R20, resistor R19, resistor R18, transistor Q5, and transistor Q10;

[0013] The output filter includes: inductor L2, electrolytic capacitor C15, electrolytic capacitor C14, and capacitor C13;

[0014] The high-voltage surge suppression module includes a transient voltage suppression diode D5.

[0015] In a further embodiment, the drain of the MOSFET Q6 is connected to one end of the resistor R20 and one end of the resistor R19 and is input with voltage Vi. The gate of the MOSFET Q6 is simultaneously connected to the other end of the resistor R20 and the collector of the transistor Q15. The base of the transistor Q5 is simultaneously connected to one end of the resistor R18, the emitter of the transistor Q5, and the base of the transistor Q10 and is grounded. The other end of the resistor R18 is input with a PWM signal. The gate of the MOSFET Q9 is simultaneously connected to the other end of the resistor R19 and the collector of the transistor Q10. The source of the MOSFET Q9 is connected to the drain of the MOSFET Q6 and the source of the MOSFET Q9 is connected to the emitter of the transistor Q10 and is grounded.

[0016] In a further embodiment, one end of the inductor L2 is connected to the drain of the MOSFET Q9, and the other end is connected to one end of the electrolytic capacitor C15, one end of the electrolytic capacitor C14, and one end of the capacitor C13. One end of the capacitor C13 outputs a voltage Vo, and the other ends of the electrolytic capacitors C15, C14, and C13 are connected to the source of the MOSFET Q9.

[0017] In a further embodiment, the negative terminal of the transient voltage suppression diode D5 is connected to the drain of the MOSFET Q9, and the positive terminal is connected to the source of the MOSFET Q9.

[0018] This utility model has the following beneficial effects:

[0019] 1. Use a wide input voltage range, high-efficiency DC-DC switching power supply instead of a traditional linear regulator. This results in higher efficiency, less heat generation, and better tolerance to input voltage fluctuations.

[0020] 2. Enhanced output filtering: Increase the capacity of the input electrolytic capacitor to effectively absorb instantaneous surges and compensate for instantaneous voltage drops.

[0021] 3. Enhanced protection: Use TVS diodes to suppress high-voltage surges (such as high voltage generated by motor braking feedback) and use resettable fuses to prevent overcurrent. Attached Figure Description

[0022] Figure 1 This is the circuit diagram of this utility model. Detailed Implementation

[0023] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0024] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0025] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances. Furthermore, the technical features involved in the different embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0026] An electric bicycle instrument drive circuit includes: a conversion module, an output filter, and a high-voltage surge suppression module;

[0027] The output filter and the high-voltage surge suppression module are connected to the conversion module;

[0028] The conversion module includes: MOSFET Q6, MOSFET Q9, resistor R20, resistor R19, resistor R18, transistor Q5, and transistor Q10;

[0029] The output filter includes: inductor L2, electrolytic capacitor C15, electrolytic capacitor C14, and capacitor C13;

[0030] The high-voltage surge suppression module includes a transient voltage suppression diode D5.

[0031] In one embodiment, such as Figure 1As shown, the drain of MOSFET Q6 is connected to one end of resistor R20 and one end of resistor R19, and is input with voltage Vi. The gate of MOSFET Q6 is connected to the other end of resistor R20 and the collector of transistor Q15. The base of transistor Q5 is connected to one end of resistor R18, the emitter of transistor Q5, and the base of transistor Q10, and is grounded. The other end of resistor R18 is input with a PWM signal. The gate of MOSFET Q9 is connected to the other end of resistor R19 and the collector of transistor Q10. The source of MOSFET Q9 is connected to the drain of MOSFET Q6, and the source of MOSFET Q9 is connected to the emitter of transistor Q10 and is grounded.

[0032] In one embodiment, such as Figure 1 As shown, one end of the inductor L2 is connected to the drain of the MOSFET Q9, and the other end is connected to one end of the electrolytic capacitor C15, one end of the electrolytic capacitor C14, and one end of the capacitor C13. One end of the capacitor C13 outputs a voltage Vo, and the other ends of the electrolytic capacitors C15, C14, and C13 are connected to the source of the MOSFET Q9.

[0033] In one embodiment, such as Figure 1 As shown, the negative terminal of the transient voltage suppression diode D5 is connected to the drain of the MOSFET Q9, and the positive terminal is connected to the source of the MOSFET Q9.

[0034] Working principle: When this invention is in operation, a voltage signal Vi and a PWM control signal are input. In order to drive the MOSFET into the saturation region, a sufficient voltage needs to be applied between the gate and source so that the drain can flow the expected maximum current. Therefore, a transistor is used to drive the MOSFET. MOSFET Q6 is used to drive transistor Q5, and MOSFET Q9 is used to drive transistor Q10. A DC-DC switching power supply with a wide input voltage range and high efficiency is used to replace the traditional linear regulator, which is more efficient, generates less heat, and has better tolerance to input voltage fluctuations. Subsequently, the input voltage passes through the output filter module, which uses an LC series circuit consisting of one inductor L2 and two parallel electrolytic capacitors C15 and C14. Finally, a ceramic capacitor C13 is used to absorb the high-frequency components at the output terminal for output.

[0035] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the protection scope of this invention.

Claims

1. A drive circuit for an electric bicycle instrument panel, characterized in that, The driving circuit includes: a conversion module, an output filter, and a high-voltage surge suppression module; The output filter and the high-voltage surge suppression module are connected to the conversion module; The conversion module includes: MOSFET Q6, MOSFET Q9, resistor R20, resistor R19, resistor R18, transistor Q5, and transistor Q10; The output filter includes: inductor L2, electrolytic capacitor C15, electrolytic capacitor C14, and capacitor C13; The high-voltage surge suppression module includes a transient voltage suppression diode D5.

2. The electric bicycle instrument drive circuit according to claim 1, characterized in that, The drain of MOSFET Q6 is connected to one end of resistor R20 and one end of resistor R19, and is supplied with voltage Vi. The gate of MOSFET Q6 is connected to the other end of resistor R20 and the collector of transistor Q15. The base of transistor Q5 is connected to one end of resistor R18, the emitter of transistor Q5, and the base of transistor Q10, and is grounded. The other end of resistor R18 is supplied with a PWM signal. The gate of MOSFET Q9 is connected to the other end of resistor R19 and the collector of transistor Q10. The source of MOSFET Q9 is connected to the drain of MOSFET Q6, and the source of MOSFET Q9 is connected to the emitter of transistor Q10 and is grounded.

3. The electric bicycle instrument drive circuit according to claim 1, characterized in that, One end of the inductor L2 is connected to the drain of the MOSFET Q9, and the other end is connected to one end of the electrolytic capacitor C15, one end of the electrolytic capacitor C14, and one end of the capacitor C13. One end of the capacitor C13 outputs a voltage Vo, and the other ends of the electrolytic capacitors C15, C14, and C13 are connected to the source of the MOSFET Q9.

4. The electric bicycle instrument drive circuit according to claim 1, characterized in that, The negative terminal of the transient voltage suppression diode D5 is connected to the drain of the MOSFET Q9, and the positive terminal is connected to the source of the MOSFET Q9.

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