CN209813738U - Four-wheel drive vehicle and speed control circuit and power structure thereof - Google Patents
Four-wheel drive vehicle and speed control circuit and power structure thereof Download PDFInfo
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- CN209813738U CN209813738U CN201822024900.6U CN201822024900U CN209813738U CN 209813738 U CN209813738 U CN 209813738U CN 201822024900 U CN201822024900 U CN 201822024900U CN 209813738 U CN209813738 U CN 209813738U
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- operational amplifier
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- wheel drive
- variable resistor
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/72—Electric energy management in electromobility
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Abstract
The utility model belongs to the technical field of motor speed, a four-wheel drive speed control circuit is disclosed, include: the gyroscope comprises a gyroscope chip, a first operational amplifier U1A, a second operational amplifier U1B, a triode Q1, a first variable resistor R1, a fourth variable resistor R4, a fifth resistor R5 and an absolute value circuit; the power supply end of the gyroscope chip is respectively connected with a power supply VCC and a virtual ground output pin Out and is connected with the inverting input end of U1A, and the Ref pin is connected with a reference voltage V1; the output end of U1A is connected to virtual ground through R1, and the non-inverting input end of U1A is connected to the center tap of R1; the non-inverting input end of U1B is connected with reference voltage V5, the output end of U1B is connected with the output end of U1A through R4 and an absolute value circuit in sequence, and the inverting input end of U1B is connected with the center tap of R4; the base of Q1 is connected with the output end of U1B through R5, the collector of Q1 is provided with a connector for connecting the negative pole of the motor, and the emitter of Q1 is connected with virtual earth. The utility model provides a speed control circuit realizes high-efficient reliable speed according to the gesture of four-wheel drive and follows the adjustment.
Description
Technical Field
The utility model relates to a motor speed control technical field, in particular to four-wheel drive car and speed control circuit and power structure thereof.
Background
The four-wheel drive vehicle has high speed, is easy to fly out of the track at the top of a slope or a curve, and must be decelerated at the slope or the curve in order to prevent flying out. At present, for ramp deceleration, sponge or rubber is mostly additionally arranged below a front shovel of a four-wheel drive vehicle, when the four-wheel drive vehicle approaches a ramp, the front shovel and the slope are rubbed to achieve the effect of deceleration, but the four-wheel drive vehicle needs to be adjusted according to the ramp; for the speed reduction of the curve, a spring tap is mostly installed, the impact of the four-wheel drive vehicle and the curve is relieved, and meanwhile, the spring tap absorbs the kinetic energy of the vehicle to achieve the speed reduction purpose. However, the conventional modification does not solve the problem fundamentally, and the modified ramp or curve has selectivity, so that the deceleration effect and the reliability are poor.
SUMMERY OF THE UTILITY MODEL
The utility model provides a four-wheel drive car and speed control circuit and power structure thereof solves the poor and poor technical problem of effect of four-wheel drive car speed control reliability among the prior art.
In order to solve the technical problem, the utility model provides a four-wheel drive speed control circuit, include: the gyroscope comprises a gyroscope chip, a first operational amplifier U1A, a second operational amplifier U1B, a triode Q1, a first variable resistor R1, a fourth variable resistor R4, a fifth resistor R5 and an absolute value circuit;
the power supply ends of the gyroscope chip are respectively connected with a power supply VCC and a virtual ground GND, an output pin Out of the gyroscope chip is connected with the inverting input end of the first operational amplifier U1A, and a Ref pin of the gyroscope chip is connected with a reference voltage V1;
the output end of the first operational amplifier U1A is connected with a virtual ground GND through a first variable resistor R1, and the non-inverting input end of the first operational amplifier U1A is connected with the center tap of the first variable resistor R1;
a non-inverting input end of the second operational amplifier U1B is connected to a reference voltage V5, an output end of the second operational amplifier U1B is connected to an output end of the first operational amplifier U1A through the fourth variable resistor R4 and the absolute value circuit in sequence, and an inverting input end of the second operational amplifier U1B is connected to a center tap of the fourth variable resistor R4;
the base electrode of the triode Q1 is connected with the output end of the second operational amplifier U1B through the fifth resistor R5, the collector electrode of the triode Q1 is provided with a connector used for being connected with the negative electrode of the motor, and the emitter electrode of the triode Q1 is connected with a virtual ground GND.
Further, the fifth resistor is a variable resistor;
the output end of the second operational amplifier U1B is connected with the center tap of the fifth resistor.
Further, the circuit further comprises: a second variable resistor R2;
the first end of the second variable resistor R2 is connected with a power supply VCC, the second end of the second variable resistor R2 is connected with a virtual ground GND, and the center tap of the second variable resistor R2 is connected with the Ref pin of the gyroscope chip.
Further, the circuit further comprises: a third variable resistor R3;
the first end of the third variable resistor R3 is connected with a power supply VCC, the second end of the third variable resistor R3 is connected with a virtual ground GND, and the center tap of the third variable resistor R3 is connected with the non-inverting input end of the second operational amplifier U1B.
Further, the gyroscope chip is a unidirectional gyroscope.
The absolute value circuit includes: a third operational amplifier U1C, a fourth operational amplifier U1D, a sixth resistor R6, a seventh resistor R7, an eighth resistor R8, a ninth resistor R9, a first diode D1, and a second diode D2;
a non-inverting input terminal of the fourth operational amplifier U1D is connected to an output terminal of the first operational amplifier U1A, an output terminal of the fourth operational amplifier U1D is connected to a virtual ground GND through the ninth resistor R9, the eighth resistor R8, the seventh resistor R7 and the sixth resistor R6 which are connected in series in sequence, and an inverting input terminal of the fourth operational amplifier U1D is connected to the virtual ground GND through the eighth resistor R8, the seventh resistor R7 and the sixth resistor R6 which are connected in series in sequence;
the output end of the fourth operational amplifier is connected with the output end of the fourth operational amplifier through the fourth variable resistor R4;
the non-inverting input terminal of the third operational amplifier U1C is connected to the output terminal of the first operational amplifier U1A, the inverting input terminal of the third operational amplifier U1C is connected to the virtual ground GND through the sixth resistor R6, the output terminal of the third operational amplifier U1C is connected to the cathodes of the first diode D1 and the second diode D2, the positive electrode of the first diode D1 is connected to the inverting input terminal of the third operational amplifier U1C, and the positive electrode of the second diode D2 is connected to the virtual ground GND through the seventh resistor R7 and the sixth resistor R6 which are connected in series in sequence.
A four-wheel drive vehicle power structure comprising: the four-wheel drive vehicle speed control circuit and the driving motor are arranged on the four-wheel drive vehicle;
the positive pole of driving motor connects the power VCC, driving motor's negative pole is connected triode Q1's collecting electrode.
A four-wheel drive vehicle adopts the power structure of the four-wheel drive vehicle.
One or more technical solutions provided in the embodiments of the present application have at least the following technical effects or advantages:
the four-wheel drive speed control circuit provided in the embodiment of the application monitors the four-wheel drive attitude in real time through the gyroscope chip, and exactly measures the roll angle and the pitch angle of the four-wheel drive, and outputs corresponding roll angle voltage and pitch angle voltage as control signals for controlling the four-wheel drive motor; further, generating a deceleration control voltage for the straight track and the ramp based on the two operational amplifiers; specifically, when the four-wheel drive vehicle runs in a straight road, the roll angle of the four-wheel drive vehicle is zero, and the roll angle voltage V2 is equal to the roll angle reference voltage V1; when the four-wheel drive vehicle runs at a curve, if the roll angle of the four-wheel drive vehicle is larger than zero, the roll angle voltage V2 is larger than the roll angle reference voltage V1, and if the roll angle of the four-wheel drive vehicle is smaller than zero, the roll angle voltage V2 is smaller than the roll angle reference voltage V1; the roll angle voltage V2 and the roll angle reference voltage V1 are subtracted by a first operational amplifier, and an absolute value circuit obtains an absolute value of a voltage difference, so that the roll angle deceleration voltage V6 is finally obtained. The motor maximum rotating speed control voltage V5 and the roll angle deceleration voltage V6 are subtracted through an operational amplifier to obtain a motor rotating speed control voltage V7, the motor rotating speed control voltage V7 controls the rotating speed of the motor M1 through a high-power triode Q1, and the motor rotating speed control voltage V7 is smaller than the motor maximum rotating speed control voltage, so that the rotating speed of the motor is reduced, and the four-wheel drive speed is reduced. Similarly, when the four-wheel drive ramp operates, the pitch angle voltage changes, and the rotation speed of the motor is reduced through the operational amplifier and the high-power triode, so that the four-wheel drive speed is reduced.
Drawings
Fig. 1 is a schematic structural diagram of the four-wheel drive speed control circuit provided by the present invention.
Detailed Description
The embodiment of the application solves the technical problems of poor reliability and poor effect of speed control of the four-wheel drive in the prior art by providing the four-wheel drive and the speed control circuit and the power structure thereof.
In order to better understand the technical solutions, the technical solutions will be described in detail below with reference to the drawings and the specific embodiments of the present disclosure, and it should be understood that the specific features in the embodiments and examples of the present disclosure are detailed descriptions of the technical solutions of the present disclosure, but not limitations of the technical solutions of the present disclosure, and the technical features in the embodiments and examples of the present disclosure may be combined with each other without conflict.
Referring to fig. 1, a four-wheel drive speed control circuit includes: the gyroscope comprises a gyroscope chip, a first operational amplifier U1A, a second operational amplifier U1B, a triode Q1, a first variable resistor R1, a fourth variable resistor R4, a fifth resistor R5 and an absolute value circuit.
The power supply ends of the gyroscope chip are respectively connected with a power supply VCC and a virtual ground GND, an output pin Out of the gyroscope chip is connected with the inverting input end of the first operational amplifier U1A, and a Ref pin of the gyroscope chip is connected with a reference voltage V1;
the output end of the first operational amplifier U1A is connected with a virtual ground GND through a first variable resistor R1, and the non-inverting input end of the first operational amplifier U1A is connected with the center tap of the first variable resistor R1;
a non-inverting input end of the second operational amplifier U1B is connected to a reference voltage V5, an output end of the second operational amplifier U1B is connected to an output end of the first operational amplifier U1A through the fourth variable resistor R4 and an absolute value circuit in sequence, and an inverting input end of the second operational amplifier U1B is connected to a center tap of the fourth variable resistor R4;
the base electrode of the triode Q1 is connected with the output end of the second operational amplifier U1B through the fifth resistor R5, the collector electrode of the triode Q1 is provided with a connector used for being connected with the negative electrode of the motor, and the emitter electrode of the triode Q1 is connected with a virtual ground GND.
The absolute value circuit includes: a third operational amplifier U1C, a fourth operational amplifier U1D, a sixth resistor R6, a seventh resistor R7, an eighth resistor R8, a ninth resistor R9, a first diode D1, and a second diode D2;
a non-inverting input terminal of the fourth operational amplifier U1D is connected to an output terminal of the first operational amplifier U1A, an output terminal of the fourth operational amplifier U1D is connected to a virtual ground GND through the ninth resistor R9, the eighth resistor R8, the seventh resistor R7 and the sixth resistor R6 which are connected in series in sequence, and an inverting input terminal of the fourth operational amplifier U1D is connected to the virtual ground GND through the eighth resistor R8, the seventh resistor R7 and the sixth resistor R6 which are connected in series in sequence;
the output end of the fourth operational amplifier is connected with the output end of the fourth operational amplifier through the fourth variable resistor R4;
the non-inverting input terminal of the third operational amplifier U1C is connected to the output terminal of the first operational amplifier U1A, the inverting input terminal of the third operational amplifier U1C is connected to the virtual ground GND through the sixth resistor R6, the output terminal of the third operational amplifier U1C is connected to the cathodes of the first diode D1 and the second diode D2, the positive electrode of the first diode D1 is connected to the inverting input terminal of the third operational amplifier U1C, and the positive electrode of the second diode D2 is connected to the virtual ground GND through the seventh resistor R7 and the sixth resistor R6 which are connected in series in sequence.
Further, the fifth resistor is a variable resistor;
the output end of the second operational amplifier U1B is connected with the center tap of the fifth resistor.
Further, the circuit further comprises: a second variable resistor R2;
the first end of the second variable resistor R2 is connected with a power supply VCC, the second end of the second variable resistor R2 is connected with a virtual ground GND, and the center tap of the second variable resistor R2 is connected with the Ref pin of the gyroscope chip.
Further, the circuit further comprises: a third variable resistor R3;
the first end of the third variable resistor R3 is connected with a power supply VCC, the second end of the third variable resistor R3 is connected with a virtual ground GND, and the center tap of the third variable resistor R3 is connected with the non-inverting input end of the second operational amplifier U1B.
Further, the gyroscope chip is a unidirectional gyroscope
Specifically, when the four-wheel drive vehicle runs in a straight road, the roll angle of the four-wheel drive vehicle is zero, and the roll angle voltage V2 is equal to the roll angle reference voltage V1; when the four-wheel drive vehicle runs at a curve, if the roll angle of the four-wheel drive vehicle is larger than zero, the roll angle voltage V2 is larger than the roll angle reference voltage V1, and if the roll angle of the four-wheel drive vehicle is smaller than zero, the roll angle voltage V2 is smaller than the roll angle reference voltage V1; the roll angle voltage V2 and the roll angle reference voltage V1 are subtracted by a first operational amplifier, and an absolute value of the voltage difference is obtained by the absolute value circuit, so that the roll angle deceleration voltage V6 is finally obtained. The motor maximum rotating speed control voltage V5 and the roll angle deceleration voltage V6 are subtracted through an operational amplifier to obtain a motor rotating speed control voltage V7, the motor rotating speed control voltage V7 controls the rotating speed of the motor M1 through a high-power triode Q1, and the motor rotating speed control voltage V7 is smaller than the motor maximum rotating speed control voltage, so that the rotating speed of the motor is reduced, and the four-wheel drive speed is reduced.
Similarly, when the four-wheel drive ramp operates, the pitch angle voltage changes, and the rotation speed of the motor is reduced through the operational amplifier and the high-power triode, so that the four-wheel drive speed is reduced.
The variable resistor is adopted to flexibly adjust the reference voltage and the control voltage according to actual conditions, and adaptation to wider use scenes is achieved.
The embodiment also provides a specific power structure and a four-wheel drive implementation scheme based on the control circuit.
A four-wheel drive vehicle power structure comprising: the four-wheel drive vehicle speed control circuit and the driving motor are arranged on the four-wheel drive vehicle;
the positive pole of driving motor connects the power VCC, driving motor's negative pole is connected triode Q1's collecting electrode.
A four-wheel drive vehicle adopts the power structure of the four-wheel drive vehicle.
One or more technical solutions provided in the embodiments of the present application have at least the following technical effects or advantages:
the four-wheel drive speed control circuit provided in the embodiment of the application monitors the four-wheel drive attitude in real time through the gyroscope chip, and exactly measures the roll angle and the pitch angle of the four-wheel drive, and outputs corresponding roll angle voltage and pitch angle voltage as control signals for controlling the four-wheel drive motor; and further, generating a deceleration control voltage for the straight track and the ramp based on the two op-amps.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting, and although the present invention has been described in detail with reference to the examples, those skilled in the art should understand that the technical solutions of the present invention can be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should be covered by the scope of the claims of the present invention.
Claims (8)
1. A four-wheel drive speed control circuit, comprising: the gyroscope comprises a gyroscope chip, a first operational amplifier U1A, a second operational amplifier U1B, a triode Q1, a first variable resistor R1, a fourth variable resistor R4, a fifth resistor R5 and an absolute value circuit;
the power supply ends of the gyroscope chip are respectively connected with a power supply VCC and a virtual ground GND, an output pin Out of the gyroscope chip is connected with the inverting input end of the first operational amplifier U1A, and a Ref pin of the gyroscope chip is connected with a reference voltage V1;
the output end of the first operational amplifier U1A is connected with a virtual ground GND through a first variable resistor R1, and the non-inverting input end of the first operational amplifier U1A is connected with the center tap of the first variable resistor R1;
a non-inverting input end of the second operational amplifier U1B is connected to a reference voltage V5, an output end of the second operational amplifier U1B is connected to an output end of the first operational amplifier U1A through the fourth variable resistor R4 and the absolute value circuit in sequence, and an inverting input end of the second operational amplifier U1B is connected to a center tap of the fourth variable resistor R4;
the base electrode of the triode Q1 is connected with the output end of the second operational amplifier U1B through the fifth resistor R5, the collector electrode of the triode Q1 is provided with a connector used for being connected with the negative electrode of the motor, and the emitter electrode of the triode Q1 is connected with a virtual ground GND.
2. The four-wheel drive speed control circuit of claim 1, wherein: the fifth resistor is a variable resistor;
the output end of the second operational amplifier U1B is connected with the center tap of the fifth resistor.
3. The four-wheel drive speed control circuit according to claim 1, wherein the circuit further comprises: a second variable resistor R2;
the first end of the second variable resistor R2 is connected with a power supply VCC, the second end of the second variable resistor R2 is connected with a virtual ground GND, and the center tap of the second variable resistor R2 is connected with the Ref pin of the gyroscope chip.
4. The four-wheel drive speed control circuit according to claim 1, wherein the circuit further comprises: a third variable resistor R3;
the first end of the third variable resistor R3 is connected with a power supply VCC, the second end of the third variable resistor R3 is connected with a virtual ground GND, and the center tap of the third variable resistor R3 is connected with the non-inverting input end of the second operational amplifier U1B.
5. The four-wheel drive speed control circuit of claim 1, wherein: the gyroscope chip is a unidirectional gyroscope.
6. The four-wheel drive speed control circuit according to claim 1, wherein the absolute value circuit comprises: a third operational amplifier U1C, a fourth operational amplifier U1D, a sixth resistor R6, a seventh resistor R7, an eighth resistor R8, a ninth resistor R9, a first diode D1, and a second diode D2;
a non-inverting input terminal of the fourth operational amplifier U1D is connected to an output terminal of the first operational amplifier U1A, an output terminal of the fourth operational amplifier U1D is connected to a virtual ground GND through the ninth resistor R9, the eighth resistor R8, the seventh resistor R7 and the sixth resistor R6 which are connected in series in sequence, and an inverting input terminal of the fourth operational amplifier U1D is connected to the virtual ground GND through the eighth resistor R8, the seventh resistor R7 and the sixth resistor R6 which are connected in series in sequence;
the output end of the fourth operational amplifier is connected with the output end of the fourth operational amplifier through the fourth variable resistor R4;
the non-inverting input terminal of the third operational amplifier U1C is connected to the output terminal of the first operational amplifier U1A, the inverting input terminal of the third operational amplifier U1C is connected to the virtual ground GND through the sixth resistor R6, the output terminal of the third operational amplifier U1C is connected to the cathodes of the first diode D1 and the second diode D2, the positive electrode of the first diode D1 is connected to the inverting input terminal of the third operational amplifier U1C, and the positive electrode of the second diode D2 is connected to the virtual ground GND through the seventh resistor R7 and the sixth resistor R6 which are connected in series in sequence.
7. A four-wheel drive vehicle power structure is characterized by comprising: a four-wheel drive speed control circuit and drive motor of claim 1;
the positive pole of driving motor connects the power VCC, driving motor's negative pole is connected triode Q1's collecting electrode.
8. The utility model provides a four-wheel drive car which characterized in that: the four-wheel drive vehicle power structure of claim 7 is adopted.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822024900.6U CN209813738U (en) | 2018-12-04 | 2018-12-04 | Four-wheel drive vehicle and speed control circuit and power structure thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822024900.6U CN209813738U (en) | 2018-12-04 | 2018-12-04 | Four-wheel drive vehicle and speed control circuit and power structure thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209813738U true CN209813738U (en) | 2019-12-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201822024900.6U Expired - Fee Related CN209813738U (en) | 2018-12-04 | 2018-12-04 | Four-wheel drive vehicle and speed control circuit and power structure thereof |
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| CN (1) | CN209813738U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109466343A (en) * | 2018-12-04 | 2019-03-15 | 江汉大学 | A kind of 4-wheel driven car speed control circuit |
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2018
- 2018-12-04 CN CN201822024900.6U patent/CN209813738U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109466343A (en) * | 2018-12-04 | 2019-03-15 | 江汉大学 | A kind of 4-wheel driven car speed control circuit |
| CN109466343B (en) * | 2018-12-04 | 2024-01-05 | 江汉大学 | Four-wheel drive speed control circuit |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20191220 Termination date: 20201204 |