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 PDF

Info

Publication number
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
Authority
CN
China
Prior art keywords
resistance
circuit
connect
pwm signal
capacitor
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN201821881441.7U
Other languages
Chinese (zh)
Inventor
倪仲明
吴海松
徐金尧
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ningbo Essence Electronic Polytron Technologies Inc
Original Assignee
Ningbo Essence Electronic Polytron Technologies Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ningbo Essence Electronic Polytron Technologies Inc filed Critical Ningbo Essence Electronic Polytron Technologies Inc
Priority to CN201821881441.7U priority Critical patent/CN209581288U/en
Application granted granted Critical
Publication of CN209581288U publication Critical patent/CN209581288U/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Landscapes

  • Lighting Device Outwards From Vehicle And Optical Signal (AREA)
  • Circuit Arrangement For Electric Light Sources In General (AREA)

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

A kind of headlight for vehicles light dimming electric motor controlled by pwm signal
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).
CN201821881441.7U 2018-11-15 2018-11-15 A kind of headlight for vehicles light dimming electric motor controlled by pwm signal Active CN209581288U (en)

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)

Similar Documents

Publication Publication Date Title
CN101848577B (en) LED driving system and driving method
CN104902653A (en) LED constant-voltage dimming power supply and LED lamp dimming system
CN207425326U (en) The LED backlight drive circuit of head up display
CN103342108A (en) Headlight drive circuit
CN102573189B (en) Step-down light-emitting diode (LED) driving circuit
CN102781134B (en) Dimmable LED (Light Emitting Diode) driving circuit and lamp
CN206686410U (en) A kind of automobile daytime driving lamp drive circuit
CN209581288U (en) A kind of headlight for vehicles light dimming electric motor controlled by pwm signal
CN206283685U (en) A kind of day portable lighter and the LED drive circuit of position lamp multiplexing
CN107914636A (en) Vehicle-mounted light adjusting controller
CN201690647U (en) Burst mode light dimming driving circuit of LED tube
CN107734784B (en) Control method of LED constant current source system
CN203399355U (en) LED driver and LED lamp
CN108040390A (en) LED light light control device without stroboscopic brightness-adjustable is controlled based on PWM
CN206774210U (en) A kind of screen luminance of mobile phone control device
CN206226773U (en) A kind of LED is without stroboscopic adjusting control circuit
CN107404784B (en) Dimming module, dimming method and lighting device
CN201937901U (en) Intelligent constant-voltage type light emitting diode (LED) dimming controller
CN103582227A (en) Dimming control circuit and lamp
CN210088743U (en) LED automobile lamp
CN103557502A (en) Control circuit of automobile LED daytime running lamp
CN110996459A (en) Daytime running light drive circuit with dynamic effect
JP2014157785A (en) Drive circuit, and lamp for vehicles
CN102651930B (en) LED (Light-Emitting Diode) dimming drive circuit
CN215379294U (en) Working lamp and driving circuit thereof

Legal Events

Date Code Title Description
GR01 Patent grant
GR01 Patent grant