CN209590232U - A kind of electric bicycle automatic failure detection circuit - Google Patents
A kind of electric bicycle automatic failure detection circuit Download PDFInfo
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- CN209590232U CN209590232U CN201822236861.6U CN201822236861U CN209590232U CN 209590232 U CN209590232 U CN 209590232U CN 201822236861 U CN201822236861 U CN 201822236861U CN 209590232 U CN209590232 U CN 209590232U
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Abstract
The utility model discloses a kind of electric bicycle automatic failure detection circuits, belong to vehicle technology field, including power supply unit, electric vehicle motor current supply circuit, battery pack, current of electric sampling resistor R17, Hall current sensor L3, peak sampling hold circuit, undervoltage detection circuit, amplifying circuit and MCU controller U1；Solves the technical issues of motor peak point current is acquired by sampling hold circuit, the utility model acquires the operating current of motor using Hall sensor, and its current signal is amplified by adjustable gain amplifying circuit, it can be very good the control gain amplifier in production, reduce the substandard products quantity in production；The utility model can directly measure the peak point current of motor, prevention motor because peak point current is excessive damage the case where.
Description
Technical field
The utility model belongs to vehicle technology field more particularly to a kind of electric bicycle automatic failure detection circuit.
Background technique
With the development of the social economy, people are more and more to the intelligent demand of electric vehicle, existing electric vehicle control
System monitoring, control function are limited, and intelligence degree is not high, it is difficult to meet the needs of people.
The operating current of traditional automatic failure detection circuit intelligent measurement electric vehicle and the operating voltage of battery, and detection faces
Smaller, function is more single, can not judge the peak point current and its working condition of motor, cannot play to the failure of motor
The detection of effect prevents.
Summary of the invention
The purpose of the utility model is to provide a kind of electric bicycle automatic failure detection circuit, solves and electricity is kept by sampling
Road acquires the technical issues of motor peak point current.
To achieve the above objectives, the present invention adopts the following technical solutions:
A kind of electric bicycle automatic failure detection circuit, including power supply unit, electric vehicle motor current supply circuit, battery pack, electricity
Machine current sampling resistor R17, Hall current sensor L3, peak sampling hold circuit, undervoltage detection circuit, amplifying circuit and
MCU controller U1；
The anode of battery pack B1 provides BAT voltage, cathode provides ground wire, and battery pack is the power supply of electric vehicle DC circuit；Electricity
The just extremely power supply unit power supply of pond group B1, power supply unit output+12V voltage ,+5V voltage and -12V voltage；
Current of electric sampling resistor R17 is connected in electric vehicle motor current supply circuit, on electric vehicle motor current supply circuit also
Equipped with Hall current sensor L3；
Power end connection 5V voltage, the output end of Hall current sensor L3 connects amplifying circuit；
Amplifying circuit includes resistance R8, resistance R9, resistance R10, potentiometer R11 and amplifier IC2, resistance R8, resistance R9,
Resistance R10, potentiometer R11 and amplifier IC2 constitute a variable-gain amplification circuit, the output of Hall current sensor L3
End connects the negative input end and positive input terminal of amplifier IC2 by resistance R8 with resistance R9 respectively, and the output end of amplifier IC2 connects
First port AD of MCU controller U1 is connect, potentiometer R10 is the gain setting resistor of variable-gain amplification circuit；
Peak sampling hold circuit include resistance R3, resistance R1, resistance R2, potentiometer R4, amplifier IC1, diode D1,
Resistance R5, capacitor C1, resistance R6, capacitor C3, field-effect tube Q1 and resistance R7, one end connection current of electric sampling electricity of resistance R3
The sampling end of R17, the negative input end of other end connection amplifier IC1 are hindered, the positive input terminal of amplifier IC1 is connected by resistance R1
Ground wire, the positive input terminal of amplifier IC1 also pass through the Interposer contact of resistance R2 connection potentiometer R4, one end connection of potentiometer R4
12V voltage, other end connection -12V voltage；
The negative input end of amplifier IC1 also passes through the pole S of resistance R5 connection field-effect tube Q1, and capacitor is connected in parallel on resistance R5
On, the cathode of the output end connection diode D1 of amplifier IC1, the anode of diode D1 passes through the one of resistance R6 connection switch S1
The other end at end, switch S1 connects 12V voltage, and the anode of diode D1 is also connected with the pole G of field-effect tube Q1, field-effect tube Q1's
The pole D connects 12V voltage, the pole S by resistance R7 connection -12V voltage, and the pole S of field-effect tube Q1 connects the second of MCU controller U1
A port AD；
Undervoltage detection circuit includes resistance R12, resistance R14, resistance R13, resistance R15 and comparator IC3, resistance R14's
One end connects BAT voltage, the other end by resistance R12 connection ground wire, and one end connection 5V voltage, the other end of R15 passes through resistance
The connecting node of R13 connection ground wire, resistance R14 and resistance R12 are also connected with the positive input terminal of comparator IC3, resistance R13 and resistance
The connecting node of R15 is also connected with the negative input end of comparator IC3, and the output end of comparator IC3 connects one of MCU controller U1
I/O port.
Preferably, the model c8051f020 of the MCU controller；The model CA3080 of the amplifier IC1, institute
State the model LM211 of comparator IC3；The model uA741 of the amplifier IC2.
Preferably, the power supply unit includes 12VDC-DC module, -12V three terminal regulator and 5V three terminal regulator, -12V
The model LM7912 of three terminal regulator；The model LM7805 of the 5V three terminal regulator.
A kind of electric bicycle automatic failure detection circuit described in the utility model, solves and is acquired by sampling hold circuit
The technical issues of motor peak point current, the utility model acquire the operating current of motor using Hall sensor, and by adjustable
Gain amplifying circuit amplifies its current signal, can be very good the control gain amplifier in production, reduces in production
Substandard products quantity；The utility model can directly measure the peak point current of motor, and prevention motor occurs because peak point current is excessive
The case where damage, occurs.
Detailed description of the invention
Fig. 1 is the system architecture diagram of the utility model.
Specific embodiment
A kind of electric bicycle automatic failure detection circuit as shown in Figure 1, including power supply unit, electric vehicle motor are powered back
Road, battery pack, current of electric sampling resistor R17, Hall current sensor L3, peak sampling hold circuit, undervoltage detection circuit,
Amplifying circuit and MCU controller U1；
The anode of battery pack B1 provides BAT voltage, cathode provides ground wire, and battery pack is the power supply of electric vehicle DC circuit；Electricity
The just extremely power supply unit power supply of pond group B1, power supply unit output+12V voltage ,+5V voltage and -12V voltage；
Current of electric sampling resistor R17 is connected in electric vehicle motor current supply circuit, on electric vehicle motor current supply circuit also
Equipped with Hall current sensor L3；
Power end connection 5V voltage, the output end of Hall current sensor L3 connects amplifying circuit；
Amplifying circuit includes resistance R8, resistance R9, resistance R10, potentiometer R11 and amplifier IC2, resistance R8, resistance R9,
Resistance R10, potentiometer R11 and amplifier IC2 constitute a variable-gain amplification circuit, the output of Hall current sensor L3
End connects the negative input end and positive input terminal of amplifier IC2 by resistance R8 with resistance R9 respectively, and the output end of amplifier IC2 connects
First port AD of MCU controller U1 is connect, potentiometer R10 is the gain setting resistor of variable-gain amplification circuit；
The utility model uses sampler of the Hall direct current transducer L3 as motor working current, and precision is high, property
It can stablize, the model HBA-NP Hall current sensor that Hall direct current transducer L3 is used, the utility model uses in the later period
Amplifying circuit amplifies the signal of Hall direct current transducer L3, and device amplifying circuit is variable-gain amplification circuit, is producing
When, the potentiometer R10 i.e. gain of regulated amplifier only need to be adjusted, easy to operate, check and correction when facilitating production.
Peak sampling hold circuit include resistance R3, resistance R1, resistance R2, potentiometer R4, amplifier IC1, diode D1,
Resistance R5, capacitor C1, resistance R6, capacitor C3, field-effect tube Q1 and resistance R7, one end connection current of electric sampling electricity of resistance R3
The sampling end of R17, the negative input end of other end connection amplifier IC1 are hindered, the positive input terminal of amplifier IC1 is connected by resistance R1
Ground wire, the positive input terminal of amplifier IC1 also pass through the Interposer contact of resistance R2 connection potentiometer R4, one end connection of potentiometer R4
12V voltage, other end connection -12V voltage；
The negative input end of amplifier IC1 also passes through the pole S of resistance R5 connection field-effect tube Q1, and capacitor is connected in parallel on resistance R5
On, the cathode of the output end connection diode D1 of amplifier IC1, the anode of diode D1 passes through the one of resistance R6 connection switch S1
The other end at end, switch S1 connects 12V voltage, and the anode of diode D1 is also connected with the pole G of field-effect tube Q1, field-effect tube Q1's
The pole D connects 12V voltage, the pole S by resistance R7 connection -12V voltage, and the pole S of field-effect tube Q1 connects the second of MCU controller U1
A port AD；
The peak sampling hold circuit of the utility model is constituted using an operational amplifier IC1 and a field-effect tube Q1
Peak detector can effectively improve the accuracy of output peak value, can be intuitive by the partial pressure value on acquisition resistance R17
Acquisition motor peak point current, and after peak sampling hold circuit, the peak value energy long period of input signal
It is stored on capacitor C3, and then MCU controller U1 is enable accurately to get very much peak-current signal.
Undervoltage detection circuit includes resistance R12, resistance R14, resistance R13, resistance R15 and comparator IC3, resistance R14's
One end connects BAT voltage, the other end by resistance R12 connection ground wire, and one end connection 5V voltage, the other end of R15 passes through resistance
The connecting node of R13 connection ground wire, resistance R14 and resistance R12 are also connected with the positive input terminal of comparator IC3, resistance R13 and resistance
The connecting node of R15 is also connected with the negative input end of comparator IC3, and the output end of comparator IC3 connects one of MCU controller U1
I/O port.
The utility model uses core element of the comparator as undervoltage detection circuit, when battery voltage value reduces, electricity
Partial pressure between resistance R12 and resistance R14 decreases, when dropping below the partial pressure between resistance R13 and resistance R15, than
Low level alarm is issued to MCU controller U1 compared with device IC3.
Preferably, the model c8051f020 of the MCU controller；The model CA3080 of the amplifier IC1, institute
State the model LM211 of comparator IC3；The model uA741 of the amplifier IC2.
Preferably, the power supply unit includes 12VDC-DC module, -12V three terminal regulator and 5V three terminal regulator, -12V
The model LM7912 of three terminal regulator；The model LM7805 of the 5V three terminal regulator.
The utility model can prejudge the health status of motor by the peak point current of acquisition motor, prevent motor
Further damage, the utility model monitor the operating current of motor in real time by Hall direct current transducer L3, monitor motor in real time
Working condition.
The MCU controller U1 of the present embodiment can externally connected with display screen, for showing whether motor peak point current normal, motor work
Make whether electric current normal and the whether excessively low important parameter of battery capacity, provides intuitive display for the self-test of electric bicycle.
A kind of electric bicycle automatic failure detection circuit described in the utility model, solves and is acquired by sampling hold circuit
The technical issues of motor peak point current, the utility model acquire the operating current of motor using Hall sensor, and by adjustable
Gain amplifying circuit amplifies its current signal, can be very good the control gain amplifier in production, reduces in production
Substandard products quantity；The utility model can directly measure the peak point current of motor, and prevention motor occurs because peak point current is excessive
The case where damage, occurs.
Claims (3)
1. a kind of electric bicycle automatic failure detection circuit, it is characterised in that: including power supply unit, electric vehicle motor current supply circuit,
Battery pack, Hall current sensor L3, peak sampling hold circuit, undervoltage detection circuit, is put current of electric sampling resistor R17
Big circuit and MCU controller U1；
The anode of battery pack B1 provides BAT voltage, cathode provides ground wire, and battery pack is the power supply of electric vehicle DC circuit；Battery pack
The just extremely power supply unit power supply of B1, power supply unit output+12V voltage ,+5V voltage and -12V voltage；
Current of electric sampling resistor R17 is connected in electric vehicle motor current supply circuit, is additionally provided on electric vehicle motor current supply circuit
Hall current sensor L3；
Power end connection 5V voltage, the output end of Hall current sensor L3 connects amplifying circuit；
Amplifying circuit includes resistance R8, resistance R9, resistance R10, potentiometer R11 and amplifier IC2, resistance R8, resistance R9, resistance
R10, potentiometer R11 and amplifier IC2 constitute a variable-gain amplification circuit, the output end point of Hall current sensor L3
Not Tong Guo resistance R8 the negative input end and positive input terminal of amplifier IC2, the output end connection of amplifier IC2 are connected with resistance R9
First port AD of MCU controller U1, potentiometer R10 are the gain setting resistor of variable-gain amplification circuit；
Peak sampling hold circuit includes resistance R3, resistance R1, resistance R2, potentiometer R4, amplifier IC1, diode D1, resistance
One end of R5, capacitor C1, resistance R6, capacitor C3, field-effect tube Q1 and resistance R7, resistance R3 connect current of electric sampling resistor
Sampling end, the other end of R17 connect the negative input end of amplifier IC1, and the positive input terminal of amplifier IC1 is by resistance R1 connection
Line, the positive input terminal of amplifier IC1 also pass through the Interposer contact of resistance R2 connection potentiometer R4, one end connection of potentiometer R4
12V voltage, other end connection -12V voltage；
The negative input end of amplifier IC1 also passes through the pole S of resistance R5 connection field-effect tube Q1, and capacitor is connected in parallel on resistance R5, puts
The cathode of the output end connection diode D1 of big device IC1, the anode of diode D1 pass through one end of resistance R6 connection switch S1, open
The other end for closing S1 connects 12V voltage, and the anode of diode D1 is also connected with the pole G of field-effect tube Q1, and the pole D of field-effect tube Q1 connects
Connect 12V voltage, the pole S passes through resistance R7 connection -12V voltage, second AD of the pole the S connection MCU controller U1 of field-effect tube Q1
Port；
Undervoltage detection circuit includes resistance R12, resistance R14, resistance R13, resistance R15 and comparator IC3, one end of resistance R14
BAT voltage, the other end are connected by resistance R12 connection ground wire, one end connection 5V voltage, the other end of R15 is connected by resistance R13
Ground line, the connecting node of resistance R14 and resistance R12 are also connected with the positive input terminal of comparator IC3, resistance R13 and resistance R15's
Connecting node is also connected with the negative input end of comparator IC3, an I/O port of the output end connection MCU controller U1 of comparator IC3.
2. a kind of electric bicycle automatic failure detection circuit as described in claim 1, it is characterised in that: the MCU controller
Model c8051f020；The model CA3080, the model LM211 of the comparator IC3 of the amplifier IC1；It is described to put
The model uA741 of big device IC2.
3. a kind of electric bicycle automatic failure detection circuit as described in claim 1, it is characterised in that: the power supply unit includes
12VDC-DC module, -12V three terminal regulator and 5V three terminal regulator, the model LM7912 of -12V three terminal regulator；The 5V
The model LM7805 of three terminal regulator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822236861.6U CN209590232U (en) | 2018-12-28 | 2018-12-28 | A kind of electric bicycle automatic failure detection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822236861.6U CN209590232U (en) | 2018-12-28 | 2018-12-28 | A kind of electric bicycle automatic failure detection circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209590232U true CN209590232U (en) | 2019-11-05 |
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ID=68350032
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201822236861.6U Active CN209590232U (en) | 2018-12-28 | 2018-12-28 | A kind of electric bicycle automatic failure detection circuit |
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| CN (1) | CN209590232U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113911254A (en) * | 2021-10-28 | 2022-01-11 | 南京懂玫驱动技术有限公司 | Motor and electric power-assisted bicycle driving system |
-
2018
- 2018-12-28 CN CN201822236861.6U patent/CN209590232U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113911254A (en) * | 2021-10-28 | 2022-01-11 | 南京懂玫驱动技术有限公司 | Motor and electric power-assisted bicycle driving system |
| CN113911254B (en) * | 2021-10-28 | 2023-04-07 | 南京懂玫驱动技术有限公司 | Motor and electric power-assisted bicycle driving system |
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