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CN-122008899-A - Over-acceleration protection system of electric motorcycle

CN122008899ACN 122008899 ACN122008899 ACN 122008899ACN-122008899-A

Abstract

The invention provides an electric motorcycle over-acceleration protection system, which is characterized in that a Hall rotary handle outputs an operation control signal to a vehicle-mounted controller and a first input end of a comparison control circuit, an output end of a speed sensor is connected to a second input end of the comparison control circuit, power input ends of a first electronic switch and a second electronic switch are connected to a power output end of a motor driving circuit, the power input end of the first electronic switch is connected to a power end of a driving motor, the power output end of the second electronic switch is connected to an input end of a digital potentiometer, the output end of the digital potentiometer is connected to the power end of the driving motor, a control end of the digital potentiometer is connected to the vehicle-mounted controller, a control input end of the first control circuit is connected to a first control output end of the comparison control circuit, the first control circuit is used for controlling on-off of the first electronic switch, the control input end of the second control circuit is connected to a second control output end of the comparison control circuit, the control output end of the second control circuit is used for controlling on-off of the second electronic switch, and the second control circuit is also used for controlling on-off of the first electronic switch when the second electronic switch is turned on.

Inventors

  • XIONG LIN
  • Lan Caixue

Assignees

  • 重庆元图机车工业有限公司

Dates

Publication Date
20260512
Application Date
20260318

Claims (7)

  1. 1. The over-acceleration protection system of the electric motorcycle is characterized by comprising a Hall rotary handle, a speed sensor, a first electronic switch, a second electronic switch, a digital potentiometer RP, a first control circuit, a second control circuit and a comparison control circuit; the speed sensor is used for detecting a speed signal of the electric motorcycle and outputting the speed signal to a second input end of the comparison control circuit; The power input ends of the first electronic switch and the second electronic switch are connected with the power output end of the motor driving circuit, the power input end of the first electronic switch is connected with the power end of the driving motor, the power output end of the second electronic switch is connected with the input end of the digital potentiometer RP, the output end of the digital potentiometer RP is connected with the power end of the driving motor, and the control end of the digital potentiometer RP is connected with the vehicle-mounted controller; The control input end of the first control circuit is connected with the first control output end of the comparison control circuit, and the first control circuit is used for controlling the first electronic switch to be turned on or turned off; The control input end of the second control circuit is connected with the second control output end of the comparison control circuit, the control output end of the second control circuit is used for controlling the second electronic switch to be turned on or off, and the second control circuit is also used for controlling the first electronic switch to be turned off when the second electronic switch is turned on.
  2. 2. The system of claim 1, wherein the first electronic switch is a PMOS transistor Q1, a source electrode of the PMOS transistor Q1 is used as a power input end of the first electronic switch, a drain electrode of the PMOS transistor Q1 is used as a power output end of the first electronic switch, and a grid electrode of the PMOS transistor Q1 is used as a control end of the first electronic switch and is connected to a control output end of the first control circuit.
  3. 3. The system of claim 2, wherein the first control circuit comprises a resistor R7, a resistor R8, a resistor R5, a resistor R3, a resistor R4, a resistor R6, a triode T1 and a triode T2; One end of a resistor R8 is connected to the source electrode of the PMOS tube Q1, the other end of the resistor R8 is connected to the collector electrode of the triode T2 through a resistor R7, a common connection point between the resistor R8 and the resistor R7 is used as a control output end of the first control circuit to be connected to the grid electrode of the PMOS tube Q1, the emitter electrode of the triode T2 is grounded, one end of a resistor R6 is connected to the source electrode of the PMOS tube Q1, the other end of the resistor R6 is grounded through a resistor R4, the common connection point between the resistor R4 and the resistor R6 is connected to the base electrode of the triode T2 through a resistor R5, the collector electrode of the triode T1 is connected to the common connection point between the resistor R4 and the resistor R6, the emitter electrode of the triode T1 is grounded, the base electrode of the triode T1 is connected to one end of the resistor R3, and the other end of the resistor R3 is used as a control input end of the first control circuit.
  4. 4. The system of claim 1, wherein the second electronic switch is an NMOS switch Q2, a drain electrode of the NMOS transistor Q2 is used as a power input end of the second electronic switch, a source electrode of the NMOS transistor Q2 is used as a power output end of the second electronic switch, and a grid electrode of the NMOS transistor Q2 is used as a control end of the second electronic switch to be connected with a control output end of the second control circuit.
  5. 5. The system of claim 4 wherein the second control circuit comprises a resistor R9, a resistor R10, a resistor R11, a resistor R13, a triode T3 and a triode T4, wherein the triode T3 is a P-type triode; One end of a resistor R9 is connected with the drain electrode of the NMOS tube Q2, the other end of the resistor R9 is connected with the emitter electrode of a triode T3, the collector electrode of the triode T3 is grounded through a resistor R13, and the common connection point of the collector electrode of the triode T3 and the resistor R13 is used as a control output end of a second control circuit to be respectively connected with the grid electrode of the NMOS tube Q2 and the control input end of a first control circuit; The base of triode T3 is connected in triode T4's collecting electrode, and triode T4's projecting pole ground connection, and triode T4's base is connected in resistance R11's one end, and resistance R11's the other end is as the control input of second control circuit.
  6. 6. The system of claim 5, wherein the second control circuit further comprises a delay circuit, the delay circuit comprises a resistor R12 and a capacitor C1, one end of the resistor R12 is connected to the collector of the triode T3, and the other end of the resistor R12 is grounded through the capacitor C1.
  7. 7. The system of claim 1, wherein the comparison control circuit comprises a comparator U1, a comparator U2, a resistor R1, a resistor R2, an AND gate circuit U3 and a diode D1; The same phase end of the comparator U1 is connected with the output end of the Hall rotating handle, one end of the resistor R2 is connected with the power supply VDD, the other end of the resistor R2 is grounded through the resistor R1, a common connection point between the resistor R1 and the resistor R2 is connected with the opposite phase end of the comparator U1, the output end of the comparator U1 is connected with the positive pole of the diode D1, the negative pole of the diode D1 is used as the first control output end of the comparison control circuit, and the output end of the comparator U1 is also connected with the first input end of the AND gate circuit U3; The same phase end of the comparator U2 is connected with the speed sensor, the reverse phase end of the comparator U2 is grounded, the output end of the comparator U2 is connected with the second input end of the AND gate circuit U3, and the output end of the comparator U3 serves as the second control output end of the comparison control circuit.

Description

Over-acceleration protection system of electric motorcycle Technical Field The invention relates to electric motorcycle protection equipment, in particular to an electric motorcycle over-acceleration protection system. Background The electric motor car is widely used due to the economical efficiency and convenience, and particularly the two-wheel electric motor car is more widely used. In the driving process of the electric motorcycle, certain potential safety hazards exist, such as the foot support (or called as a side support) enters a form state without being folded, protection is generally realized through a foot support detection switch at present, namely the vehicle cannot advance even if a Hall rotary handle (the Hall rotary handle is an operation device for accelerating and decelerating the electric motorcycle) is rotated when the foot support is not folded, the rotary handle is used for sensing angle change and outputting a corresponding angle change voltage signal, and the voltage signal is recognized by a vehicle-mounted controller so as to output corresponding driving current to a power motor). However, the electric motorcycle has a potential safety hazard of over acceleration, that is, over acceleration of the vehicle from rest to movement (that is, starting) and over acceleration during running, that is, the rotation angle of the hall handle is too large due to misoperation of a driver during operation, at this time, the controller considers that the driver intends to accelerate, so that the current output to the driving motor is controlled to suddenly increase, no matter in rest or running, a galloping phenomenon is easy to occur, particularly, in a road section with more vehicles, collision accidents are easy to occur, if the vehicle is suddenly out of control, sideslip or even rollover in a situation with a faster speed, so that serious potential safety hazard exists, and an effective means for solving the technical problem is not available in the prior art. Therefore, in order to solve the above-mentioned technical problems, a new technical means is needed. Disclosure of Invention Therefore, the invention aims to provide an over-acceleration protection system for an electric motorcycle, which judges whether the electric motorcycle is in a static starting state or a driving state at present by acquiring a Hall rotary handle and a speed signal of a vehicle, controls a power supply loop of a driving motor through the two states, enables the driving motor to be incapable of obtaining power through the static starting state, and limits the driving current of the driving motor within a safety range if the Hall rotary handle is excessively rotated in the driving state, thereby effectively preventing safety accidents such as galloping, sideslip and the like, ensuring the safety of drivers and passengers, and has high response speed, stability and reliability in the whole process. The invention provides an over-acceleration protection system of an electric motorcycle, which comprises a Hall rotary handle, a speed sensor, a first electronic switch, a second electronic switch, a digital potentiometer RP, a first control circuit, a second control circuit and a comparison control circuit, wherein the Hall rotary handle is connected with the speed sensor; the speed sensor is used for detecting a speed signal of the electric motorcycle and outputting the speed signal to a second input end of the comparison control circuit; The power input ends of the first electronic switch and the second electronic switch are connected with the power output end of the motor driving circuit, the power input end of the first electronic switch is connected with the power end of the driving motor, the power output end of the second electronic switch is connected with the input end of the digital potentiometer RP, the output end of the digital potentiometer RP is connected with the power end of the driving motor, and the control end of the digital potentiometer RP is connected with the vehicle-mounted controller; The control input end of the first control circuit is connected with the first control output end of the comparison control circuit, and the first control circuit is used for controlling the first electronic switch to be turned on or turned off; The control input end of the second control circuit is connected with the second control output end of the comparison control circuit, the control output end of the second control circuit is used for controlling the second electronic switch to be turned on or off, and the second control circuit is also used for controlling the first electronic switch to be turned off when the second electronic switch is turned on. Further, the first electronic switch is a PMOS transistor Q1, a source electrode of the PMOS transistor Q1 is used as a power input terminal of the first electronic switch, a drain electrode of the PMOS transistor Q1 is used as a power output terminal of the first