CN209581288U - A kind of headlight for vehicles light dimming electric motor controlled by pwm signal - Google Patents
A kind of headlight for vehicles light dimming electric motor controlled by pwm signal Download PDFInfo
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- CN209581288U CN209581288U CN201821881441.7U CN201821881441U CN209581288U CN 209581288 U CN209581288 U CN 209581288U CN 201821881441 U CN201821881441 U CN 201821881441U CN 209581288 U CN209581288 U CN 209581288U
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Abstract
The utility model relates to a kind of headlight for vehicles light dimming electric motors controlled by pwm signal, including circuit board, adjusting circuit on circuit boards and the motor with adjusting circuit connection are set, adjusting circuit includes that RC filter circuit and one end with RC filter circuit connect the control circuit that the other end is connected to motor, RC filter circuit includes the input terminal for pwm signal input, the resistance R3 and capacitor C4 in parallel with resistance R3, the one end resistance R3 connect the other end with input terminal and connects to the control circuit, the one end capacitor C4 connect the other end and ground connection with resistance R3, pwm signal is inputted from input terminal, it is available with the linear DC voltage of pwm signal duty ratio by first-order low-pass wave circuit, pwm pulse bandwidth modulation signals are converted into d. c. voltage signal, then by the DC voltage Signal is input in control circuit, controls the forward and reverse of motor, to realize the control to car bulb, structure is simple, convenient for operation, saves interior space.
Description
Technical field
The utility model relates to technical field of automobile parts, big more particularly, to a kind of automobile by pwm signal control
Lamp light dimming electric motor.
Background technique
With the development of automobile safety lighting technology, the intelligent Light-control System of automobile using more and more extensive, especially
Applied to the headlight for vehicles light dimming electric motor of automobile front lamp, the working principle of this light dimming electric motor is by the intracorporal motor of shell
Driving, motor drive the rotation of internal drive mechanism, to drive bulb mandril flexible, bulb drives the reflector of headlight to rotate
Axis swing irradiates different range so that the light source distance of automobile be made to change.Usual light dimming electric motor needs to receive direct current
Voltage signal can not receive pwm signal, and signal end can only be controlled by dimmer switch, and automobile needs to be separately provided one
Switch can so occupy interior space, and for driver's also inconvenient operation in the process of moving, and regulating switch has gear
Limitation, cannot the arbitrary height for adjusting headlight.
Utility model content
The technical problem to be solved by the utility model is to provide a kind of structures simply, convenient for operation, and saves car
The headlight for vehicles light dimming electric motor controlled by pwm signal in space.
The utility model the technical scheme adopted is that it is a kind of by pwm signal control headlight for vehicles light dimming electric motor, including
The adjusting circuit of circuit board, setting on circuit boards and the motor with adjusting circuit connection, adjusting circuit includes RC filtered electrical
Road and one end connect the control circuit that the other end is connected to motor with RC filter circuit, and RC filter circuit includes for pwm signal
Input terminal, resistance R3 and the capacitor C4 in parallel with resistance R3 of input, the one end resistance R3 connect the other end and control with input terminal
Circuit connection processed, the one end capacitor C4 connect the other end and ground connection with resistance R3.
The beneficial effects of the utility model are: using the above-mentioned headlight for vehicles light dimming electric motor controlled by pwm signal, from input
End input pwm signal, it is available with the linear direct current of pwm signal duty ratio by first-order low-pass wave circuit
Pwm pulse bandwidth modulation signals are converted into d. c. voltage signal, the d. c. voltage signal are then input to control circuit by pressure
In, the forward and reverse of motor are controlled by control circuit, to realize the control to car bulb, structure is simple, is convenient for
Operation, directly inputs pwm pulse bandwidth modulation signals, eliminates the process of individually designed switch, save interior space.
As preferential, control circuit include power supply VCC, with the concatenated resistance R1 of resistance R3, resistance R2, capacitor C2, current potential
Device VP, capacitor C1 and control chip, the one end resistance R1 connect the other end with resistance R3 and control the 16th pin company of chip
It connects, the one end potentiometer VP connect other end ground connection with power supply VCC, and the one end resistance R2 is connect separately with the variable resistance end of potentiometer VP
One end is connect with the first pin of control chip, and capacitor C2 is connected in parallel between the first pin and the 16th pin of control chip,
Using the structure, voltage is input on the 16th pin of control chip by resistance R1, and supply voltage VCC passes through potentiometer VP
It is input on the first pin of control chip after partial pressure by resistance R2, chip interior is drawn by comparing the first pin with the 16th
The voltage of foot realizes the control of motor.When end voltage being arranged and feedback end voltage is unequal, motor forward or reverse, when setting
Set end voltage it is equal with feedback end voltage when, motor stall.
As preferential, control circuit further includes rectifier diode D1, zener diode ZD1 and electrolytic capacitor C3, rectification
The one end diode D1 is connect with supply voltage VCC, and the other end is connect with the 12nd pin of control chip, zener diode ZD1
One end is connect with rectifier diode D1, and other end ground connection, electrolytic capacitor C3 is connected in parallel on the both ends zener diode ZD1, using the knot
Structure, supply voltage VCC are being powered after zener diode ZD1 and electrolytic capacitor C3 to chip by rectifier diode D1.
As preferential, the model TDA3629 of chip is controlled, using this chip, can achieve that location error is small, power consumption
The small effect of electric current, and this chip has heat protection function, and has open-circuit-protection and short-circuit protection function.
Detailed description of the invention
Fig. 1 is that a kind of circuit of the adjusting circuit of the headlight for vehicles light dimming electric motor by pwm signal control of the utility model is former
Reason figure.
It is as shown in the figure: 1, motor；2, input terminal；3, power supply VCC；4, chip is controlled.
Specific embodiment
Utility model is further described referring to the drawings and in conjunction with specific embodiment, to enable those skilled in the art
Refer to the instruction text can be implemented accordingly, and scope of protection of the utility model is not limited to the specific embodiment.
The utility model relates to a kind of headlight for vehicles light dimming electric motors controlled by pwm signal, including circuit board, setting are in electricity
On the plate of road adjust circuit and with the motor 1 that adjusts circuit connection, as shown in Figure 1, adjust circuit include RC filter circuit with
And one end connect the control circuit that the other end is connect with motor 1 with RC filter circuit, RC filter circuit includes inputting for pwm signal
Input terminal 2, resistance R3 and the capacitor C4 in parallel with resistance R3, the one end resistance R3 connect with input terminal 2 other end and control
Circuit connection, the one end capacitor C4 connect the other end and ground connection with resistance R3.In Fig. 1, pwm signal is inputted from input terminal 2, passes through one
Rank low pass RC filter circuit is available with the linear DC voltage of pwm signal duty ratio, by pwm pulse width modulated
Signal is converted into d. c. voltage signal, and then the d. c. voltage signal is input in control circuit, is controlled by control circuit
The forward and reverse of motor 1 processed, to realize the control to car bulb, structure is simple, convenient for operation, directly inputs PWM arteries and veins
Bandwidth modulation signals are rushed, the process of individually designed switch is eliminated, saves interior space.
It is available with the linear direct current of pwm signal duty ratio by single order low pass RC filter circuit in Fig. 1
The concrete principle of pressure are as follows: voltage is charged in high level lasting time to capacitor C4 by resistance R3, capacitor C4 stored charge, In
Low level continues the interior capacitor C4 of electricity and inwardly discharges, and capacitor C4 discharges charge, since the charge number of capacitor C4 accumulation is more than release
Charge number, therefore the DC voltage at the both ends capacitor C4 constantly climbs, and is finally reached stable state.When in stable state, capacitor C4 accumulation
Charge it is equal with the amount of charge of release, therefore voltage can do fluctuation by a small margin near a stable voltage value, suddenly
Slightly such ripple, then the voltage with PWM duty cycle at the both ends capacitor C4 are in a linear relationship.
As shown in Figure 1, control circuit includes power supply VCC3 and the concatenated resistance R1 of resistance R3, resistance R2, capacitor C2, electricity
Position device VP, capacitor C1 and control chip 4, the one end resistance R1 connect the other end with resistance R3 and draw with the 16th of control chip 4
Foot connection, the one end potentiometer VP connect other end ground connection, the variable resistance end of the one end resistance R2 and potentiometer VP with power supply VCC3
The connection other end is connect with the first pin for controlling chip 4, and the first pin and the 16th that capacitor C2 is connected in parallel on control chip 4 draws
Between foot.The model TDA3629 of control chip can achieve the effect that location error is small, static current of lcd is small using this chip
Fruit, and this chip has heat protection function, and has open-circuit-protection and short-circuit protection function.In Fig. 1, model
The first pin of TDA3629 is feedback end, and the 16th pin is setting end, and voltage is input to control chip 4 by resistance R1
On 16th pin, supply voltage VCC3 is input to the first of control chip 4 by resistance R2 after dividing by potentiometer VP and draws
On foot, chip interior realizes the control of motor 1 by comparing the voltage of the first pin and the 16th pin.When setting end voltage
When unequal with feedback end voltage, forward or reverse, when setting end voltage is equal with feedback end voltage, motor stalls motor.
As shown in Figure 1, control circuit further includes rectifier diode D1, zener diode ZD1 and electrolytic capacitor C3, rectification
The one end diode D1 is connect with supply voltage VCC3, and the other end is connect with the 12nd pin of control chip 4, zener diode
The one end ZD1 is connect with rectifier diode D1, and other end ground connection, electrolytic capacitor C3 is connected in parallel on the both ends zener diode ZD1.Power supply electricity
It presses VCC3 by rectifier diode D1, is powering after zener diode ZD1 and electrolytic capacitor C3 to chip.Rectifier diode
D1 is that reverse power connection, zener diode ZD1 are that power end high voltage pulse, electrolytic capacitor C3 absorb electricity in order to prevent in order to prevent
Source ripple.
Claims (4)
1. a kind of headlight for vehicles light dimming electric motor controlled by pwm signal, it is characterised in that: including circuit board, be arranged in circuit board
On adjust circuit and with the motor (1) that adjusts circuit connection, adjusting circuit includes that RC filter circuit and one end and RC are filtered
The control circuit that is connected to motor of the wave circuit connection other end, RC filter circuit include for pwm signal input input terminal (2),
Resistance R3 and the capacitor C4 in parallel with resistance R3, the one end resistance R3 connect the other end with input terminal and connect to the control circuit, electricity
Hold the one end C4 and connect the other end and ground connection with resistance R3.
2. a kind of headlight for vehicles light dimming electric motor controlled by pwm signal according to claim 1, it is characterised in that: control
Circuit includes power supply VCC (3) and the concatenated resistance R1 of resistance R3, resistance R2, capacitor C2, potentiometer VP, capacitor C1 and control
Chip (4), the one end resistance R1 connect the other end with resistance R3 and connect with the 16th pin for controlling chip (4), potentiometer VP mono-
End is connect with power supply VCC (3), and other end ground connection, one end resistance R2 is connect with the variable resistance end of potentiometer VP, the other end and control
First pin of coremaking piece (4) connects, and capacitor C2 is connected in parallel between the first pin and the 16th pin of control chip (4).
3. according to claim 1 or a kind of headlight for vehicles light dimming electric motor controlled by pwm signal as claimed in claim 2, special
Sign is: control circuit further includes rectifier diode D1, zener diode ZD1 and electrolytic capacitor C3, rectifier diode D1 mono-
End is connect with power supply VCC (3), and the other end is connect with the 12nd pin of control chip, the one end zener diode ZD1 and rectification two
Pole pipe D1 connection, other end ground connection, electrolytic capacitor C3 are connected in parallel on the both ends zener diode ZD1.
4. a kind of headlight for vehicles light dimming electric motor controlled by pwm signal according to claim 1, it is characterised in that: control
The model TDA3629 of chip (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821881441.7U CN209581288U (en) | 2018-11-15 | 2018-11-15 | A kind of headlight for vehicles light dimming electric motor controlled by pwm signal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821881441.7U CN209581288U (en) | 2018-11-15 | 2018-11-15 | A kind of headlight for vehicles light dimming electric motor controlled by pwm signal |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209581288U true CN209581288U (en) | 2019-11-05 |
Family
ID=68376708
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821881441.7U Active CN209581288U (en) | 2018-11-15 | 2018-11-15 | A kind of headlight for vehicles light dimming electric motor controlled by pwm signal |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209581288U (en) |
-
2018
- 2018-11-15 CN CN201821881441.7U patent/CN209581288U/en active Active
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