CN101742802B - Control method, device and system of high-intensity discharge lamp - Google Patents
Control method, device and system of high-intensity discharge lamp Download PDFInfo
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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
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
Abstract
The invention discloses a control method, a device and a system of a high-intensity discharge lamp. The method comprises the following steps: a CPU unit obtains feedback voltage concerning the high-intensity discharge lamp from a feedback unit; the CPU unit judges whether the feedback voltage is more than a first voltage threshold value; when the feedback voltage is less than or equal to the first voltage threshold value, the CPU unit carries out constant-current output control on the high-intensity discharge lamp; when the feedback voltage is more than the first voltage threshold value, the CPU unit judges whether the feedback voltage is more than a second voltage threshold value; when the feedback voltage is less than or equal to the second voltage threshold value, the CPU unit carries out constant-power output control on the high-intensity discharge lamp. The invention can shorten time for the high-intensity discharge lamp to reach standard specified luminance, lowers loss and improves the reliability and the stability of the high-intensity discharge lamp.
Description
Technical field
The present invention relates to a kind of control method, Apparatus and system of high-intensity discharge lamp.
Background technology
High-intensity discharge lamp (High Intensity Discharge is referred to as HID) also claims high-intensity discharge lamp or high-voltage gas discharging light.Common HID lamp mainly contains three kinds at present, be mercury (steam) lamp, sodium vapor lamp and metal halide lamp, wherein sodium vapor lamp divides again low-pressure sodium lamp (LowPressure Sodium is referred to as LPS) and high-pressure sodium lamp (High Pressure Sodium is referred to as HPS).Present multiplex metal halide and be filled with the high-intensity gas discharge lamp of xenon on the automobile.This new automobile headlight that contains xenon claims that again (Chinese is called for short: xenon lamp) for high-intensity discharge lamp or gas discharge type vehicle xenon lighting headlight system.Xenon lamp brightness is large, and the light tone and the sunlight that send are more approaching, and consumed power is low, and reliability is high, is not subjected to voltage influence of fluctuations on the car, has increased substantially the visibility of driving at night.At present, only have trendy luxury car just to dispose and used this novel headlight.This lamp adopts high-tech that xenon is poured in the quartz ampoule, sees through accurate high voltage package again 12V electricity moment is increased to 23000V, excites xenon in the pipe by high-tension electricity, produces a branch of superpower high color temperature arclight at two interpolars.Make luminous efficiency and brightness improve 3 times, the life-span use has improved 10 times, and is similar with automotive service life.The HID lamp is described as revolutionary automotive lighting product of 21st century, and the HID xenon lamp replaces the trend of the times that traditional Halogen lamp LED will be automobile and even lighting field development.
Existing automotive HID xenon lamp control system, the stable ignition of xenon lamp, power control are as one wishes not to the utmost in the processing of cold and hot lamp under different voltages.Have simultaneously following problem: loss and heating are larger, and efficient is lower; Adaptability is relatively poor under the different voltages; Relatively poor for different lamp adaptability.
For the stable poor problem of high-intensity discharge lamp in the correlation technique, effective solution is proposed not yet at present.
Summary of the invention
For the stable poor problem of high-intensity discharge lamp and propose the present invention, for this reason, main purpose of the present invention is to provide a kind of control method of high-intensity discharge lamp, to address the above problem.
To achieve these goals, according to an aspect of the present invention, provide a kind of control method of high-intensity discharge lamp.
Control method according to high-intensity discharge lamp of the present invention comprises: CPU element is obtained the feedback voltage about high-intensity discharge lamp from feedback unit; CPU element judges that whether feedback voltage is greater than the first voltage threshold; In the situation of feedback voltage less than or equal to the first voltage threshold, CPU element is carried out constant current output control to high-intensity discharge lamp; In the situation of feedback voltage greater than the first voltage threshold, CPU element judges that whether feedback voltage is greater than the second voltage threshold value; In the situation of feedback voltage less than or equal to the second voltage threshold value, CPU element is carried out constant power output control to high-intensity discharge lamp.
Preferably, in the situation of feedback voltage greater than the second voltage threshold value, method also comprises: CPU element begins timing after constant power output control finishes; CPU element judges whether the time of timing arrives Preset Time; Arrive in the situation of Preset Time in the time of timing, CPU element is carried out critical conduction mode control; Do not arrive in the time of timing in the situation of Preset Time, CPU element is carried out variable frequency control.
Preferably, CPU element is carried out critical conduction mode control and comprised: duty ratio or frequency that CPU element comes the grid to the MOS driver to drive according to the difference of the feedback parameter of the current feedback in the feedback unit and/or Voltage Feedback are adjusted.
Preferably, after CPU element was carried out constant power output control, method also comprised: CPU element judges whether the input of high-intensity discharge lamp and/or output exist fault; In the situation that there is fault in input and/or the output of high-intensity discharge lamp, then CPU element is processed accordingly to fault; Input and/or output at high-intensity discharge lamp do not exist in the situation of fault, and then CPU element is proceeded constant power output control.
In CPU element high-intensity discharge lamp being carried out constant current output control comprises: CPU element is obtained the feedback current from feedback unit; CPU element obtains current error according to feedback current and reference current; CPU element is adjusted the electric current of boosting unit according to current error.
To achieve these goals, according to an aspect of the present invention, provide a kind of control device of high-intensity discharge lamp.
Control device according to high-intensity discharge lamp of the present invention comprises: acquisition module is used for obtaining the feedback voltage about high-intensity discharge lamp from feedback unit; The first judge module is used for judging that whether feedback voltage is greater than the first voltage threshold; The first control module is used in the situation of feedback voltage less than or equal to the first voltage threshold, and high-intensity discharge lamp is carried out constant current output control; The second judge module is used for judging that whether feedback voltage is greater than the second voltage threshold value; The second control module is used in the situation of feedback voltage less than or equal to the second voltage threshold value, and high-intensity discharge lamp is carried out constant power output control.
To achieve these goals, according to an aspect of the present invention, provide a kind of control system of high-intensity discharge lamp.
Control system according to high-intensity discharge lamp of the present invention comprises: power subsystem provides power supply; The high-tension ignition unit is electrically connected with high-intensity discharge lamp and power subsystem, for the high-intensity discharge lamp igniting provides voltage; Boosting unit is connected with the high-tension ignition unit with power subsystem, the voltage that power subsystem the is provided processing of boosting, and the voltage after will boosting offers the high-tension ignition unit; Feedback unit is connected with boosting unit, and Voltage Feedback and/or the current feedback relevant with boosting unit is provided; CPU element,, be connected with feedback unit with boosting unit, be used for enforcement of rights and require each method of 1-5, control boosting unit according to Voltage Feedback and/or current feedback that feedback unit provides.
Preferably, feedback unit also comprises modulate circuit, wherein, modulate circuit comprises: the first resistance, the second resistance, the first operational amplifier, the first capacitor, wherein, the first input end of the first operational amplifier is connected to power supply, and the second input of the first operational amplifier is via the first grounding through resistance, and the first capacitor and the second resistance are parallel between the output and first input end of the first operational amplifier.
Preferably, boosting unit comprises driving and locking circuit, when output voltage surpasses predetermined threshold, output voltage is carried out locking, and wherein, driving and locking circuit comprise: processing module, MOS driver element, comparing unit, driving triode, wherein, an input of comparing unit is connected to boosting unit via the 3rd resistance, and another input is connected to power subsystem via the 4th resistance, and output is connected to the driving triode; An output that drives triode is connected to the MOS driver element, and is connected with processing module by the 5th resistance.
Preferably, power subsystem comprises filter circuit, and the power supply that power subsystem is provided carries out the filtering processing, wherein, filter circuit comprises: the first electric capacity, the second electric capacity, the 3rd electric capacity, wiring inductance, and wherein, the first electric capacity and wiring inductance series connection consist of the LC filter; The second electric capacity, the 3rd electric capacity and the second inductor consist of the ∏ mode filter.
Control method by high-intensity discharge lamp of the present invention comprises: CPU element is obtained the feedback voltage about high-intensity discharge lamp from feedback unit; CPU element judges that whether feedback voltage is greater than the first voltage threshold; In the situation of feedback voltage less than or equal to the first voltage threshold, CPU element is carried out constant current output control to high-intensity discharge lamp; In the situation of feedback voltage greater than the first voltage threshold, CPU element judges that whether feedback voltage is greater than the second voltage threshold value; In the situation of feedback voltage less than or equal to the second voltage threshold value, CPU element is carried out constant power output control to high-intensity discharge lamp.By the present invention, solved and be difficult to problem that current feedback and Voltage Feedback are detected, and then reached the effect that improves high-intensity discharge lamp stability.
Description of drawings
Accompanying drawing described herein is used to provide a further understanding of the present invention, consists of the application's a part, and illustrative examples of the present invention and explanation thereof are used for explaining the present invention, do not consist of improper restriction of the present invention.In the accompanying drawings:
Fig. 1 is the structural representation according to the control system of the high-intensity discharge lamp of the embodiment of the invention;
Fig. 2 is the flow chart according to the control method of the high-intensity discharge lamp of the embodiment of the invention;
Fig. 3 is the flow chart according to the preferred high-intensity discharge lamp control method of the embodiment of the invention;
Fig. 4 is the flow chart according to the preferred high-intensity discharge lamp control method of the embodiment of the invention;
Fig. 5 is the schematic diagram according to the control system of the preferred high-intensity discharge lamp of the embodiment of the invention;
Fig. 6 is the electric structural representation according to the high-intensity discharge lamp control system of the embodiment of the invention;
Fig. 7 is the structural representation according to the driving of the embodiment of the invention and locking circuit;
Fig. 8 is the schematic diagram according to the filter circuit of the embodiment of the invention;
Fig. 9 is the schematic diagram according to the preferred voltage modulate circuit of the embodiment of the invention;
Figure 10 is the schematic diagram according to the preferred current regulating circuit of the embodiment of the invention;
Figure 11 is the schematic diagram according to the control device of the high-intensity discharge lamp of the embodiment of the invention.
Embodiment
Need to prove that in the situation of not conflicting, embodiment and the feature among the embodiment among the application can make up mutually.Describe below with reference to the accompanying drawings and in conjunction with the embodiments the present invention in detail.
According to embodiments of the invention, provide a kind of control system of high-intensity discharge lamp.
Fig. 1 is the structural representation according to the control system of the high-intensity discharge lamp of the embodiment of the invention.
As shown in Figure 1, the control system of this high-intensity discharge lamp comprises: CPU element 1, boosting unit 4, full-bridge driver output unit 5, lights unit 7.Wherein, this control system comprises Based Intelligent Control and critical conduction mode control model.
Based Intelligent Control control block diagram as shown in Figure 1, this control system monitoring i
LampAnd v
LampValue, the i that feedback element is detected
LampAnd v
LampValue carry out multiplying, draw the power p of system output
Lamp, power reference p
RefWith the power output p of system
LampSubtract each other and obtain power error p
Err, power error is through adjuster G
c(s) regulate and regulate in conjunction with the output of pulse-width modulated after the control algolithm (PulseWidth Modulation is referred to as PWM) unit, the control output of realization system.Wherein, pulse width modulation (PWM) is a kind of analog control mode, its variation according to respective loads comes the biasing of modulation crystal tube grid or base stage, realize switching power supply output transistor or the change of transistor turns time, this mode can make the output voltage of power supply keep constant when operation conditions change, is to utilize the numeral of microprocessor to export a kind of very effective technology that analog circuit is controlled.
Intelligent control algorithm can feed back Voltage Feedback and the current feedback in the boosting unit 4, because feedback parameter is different, so the voltage and current feedback characteristic difference after the igniting of cold and hot lamp, i.e. i
LampAnd v
LampFeature is different, and the output of monitoring voltage modulate circuit and current regulating circuit are exported, and just can distinguish cold and hot lamp and controls in conjunction with different control algolithms.
Frequency conversion and critical conduction mode control, namely the feedback parameter according to the Voltage Feedback in the boosting unit 4 that feeds back and current feedback is different, and the state of xenon lamp control system, duty ratio or frequency that the grid that MOS is driven drives are adjusted in real time, and the xenon lamp control system is normal to be started and required operating voltage and the operating current of steady operation to satisfy.
Preferably, this control system comprises Based Intelligent Control and critical conduction mode control model, Based Intelligent Control comprises CPU element 1, power subsystem 2, feedback unit 3, boosting unit 4 and full-bridge driver output unit 5, power subsystem 2 produces the power supply of CPU element 1 and full-bridge driver output unit 5, boosting unit 4 produces the input voltage that drives high-tension ignition unit 6 and full-bridge driver output unit 5, and the output of full-bridge driver output unit 5 is used for driving lamp driver element 7.Feedback unit 3 reponse system input voltages, output voltage, output current, CPU element comprises a CPU or DSP single-chip microcomputer, and CPU element is according to the feedback adjusting intelligent control algorithm of feedback unit 3, and boosting unit 4 and full-bridge driver output unit 5 are controlled in output.
Wherein, the voltage and current feedback that CPU element 1 provides according to voltage modulate circuit and current regulating circuit; carry out the algorithm computing; electric current loop; Voltage loop and power control; and driving boosting unit 4; produce the required voltage of full-bridge output unit 5 and high-tension ignition unit 6; the voltage and current modulate circuit can also be realized failure diagnosis and protection after CPU element 1 computing; failure diagnosis and protection comprise the input overvoltage; input undervoltage; work as voltage feedback unit; the feedback of current feedback unit occurs when unusual; can judge the input overvoltage by CPU; input undervoltage, overcurrent or lamp open circuit, and turn-off output or change control algolithm and protect.
Preferably, the vehicle xenon lamp control system can be optimized control to new and old lamp and different lamp, specific implementation is, new and old lamp and different lamps, after the igniting and voltage, the electric current of the output of voltage modulate circuit and current regulating circuit in the lamp warm different, for different voltage-current curves, control system adopts different control algolithm control, has realized the Adaptive Control of different lamps and new and old lamp.
Preferably, the vehicle xenon lamp control system has the voltage adaptation that starts and light a fire under the different voltages, modulate circuit unit 15 is except Voltage Feedback and current feedback, also nurse one's health input voltage signal, the supply voltage according to different passes through Optimal Control Strategy, different start-up parameter and ignition parameter again are set, realize the adaptability under the different voltages, reduced loss and caloric value, improved reliability.
According to the embodiment of the invention, provide a kind of control method of high-intensity discharge lamp.
Fig. 2 is the flow chart according to the control method of the high-intensity discharge lamp of the embodiment of the invention.
As shown in Figure 2, the method comprises the steps that S202 is to step S210:
Step S202, CPU element is obtained the feedback voltage about high-intensity discharge lamp from feedback unit;
Step S204, CPU element judges that whether feedback voltage is greater than the first voltage threshold;
Step S206, in the situation of feedback voltage less than or equal to the first voltage threshold, CPU element is carried out constant current output control to high-intensity discharge lamp;
Step S208, in the situation of feedback voltage greater than the first voltage threshold, CPU element judges that whether feedback voltage is greater than the second voltage threshold value;
Step S210, in the situation of feedback voltage less than or equal to the second voltage threshold value, CPU element is carried out constant power output control to high-intensity discharge lamp.
Wherein, in the situation of feedback voltage greater than the second voltage threshold value, said method can also comprise: CPU element begins timing after constant power output control finishes; CPU element judges whether the time of timing arrives Preset Time; Arrive in the situation of Preset Time in the time of timing, CPU element is carried out critical conduction mode control; Do not arrive in the time of timing in the situation of Preset Time, CPU element is carried out variable frequency control.
Wherein, CPU element is carried out critical conduction mode control and can also be comprised: duty ratio or frequency that CPU element comes the grid to the MOS driver to drive according to the difference of the feedback parameter of the current feedback in the feedback unit and/or Voltage Feedback are adjusted.
Wherein, after CPU element was carried out constant power output control, said method can also comprise: CPU element judges whether the input of high-intensity discharge lamp and/or output exist fault; In the situation that there is fault in input and/or the output of high-intensity discharge lamp, then CPU element is processed accordingly to fault; Input and/or output at high-intensity discharge lamp do not exist in the situation of fault, and then CPU element is proceeded constant power output control.
Wherein, in CPU element high-intensity discharge lamp being carried out constant current output control can also comprise: CPU element is obtained the feedback current from feedback unit; CPU element obtains current error according to feedback current and reference current; CPU element is adjusted the electric current of boosting unit according to current error.
Fig. 3 is the flow chart according to the preferred high-intensity discharge lamp control method of the embodiment of the invention.
As shown in Figure 3, this preferred high-intensity discharge lamp control method comprises the steps:
Step S301, initialization.At first carry out system initialization when preferably, lighting a lamp.
Step S302, charging bootstrap capacitor, fixed frequency output.Preferably, system exports according to the fixed frequency fixed duty cycle.
Step S303, fixedly 400V output is adjusted.Preferably, Voltage loop control is output as fixedly 400V.
Step S304 judges whether igniting according to testing result.Light a fire and successfully change step SS305 over to, otherwise, change step S303 over to.
Step S305, beginning transition and burning lamp process.
Step S306 compares modulating voltage and threshold voltage, judges whether V＞Value1 sets up, and when modulating voltage during less than or equal to threshold values Value1, changes step S307 over to, otherwise enters the process 2 of the second decision threshold, sees in detail Fig. 4.
Step S307, constant current output control.When modulating voltage reaches threshold values Value1, enter constant current and drive process, realize by current closed-loop.
Wherein, when the xenon lamp control system starts, start with certain frequency and duty ratio, after the xenon lamp control system starts, realize the power adjustment by frequency conversion, xenon lamp control system power output is changed according to set power curve.
In the present invention, control flow as shown in Figure 3, CPU control comprises Current Control feedback loop and feedback power control loop, presets the threshold values maximum level if electric current is in, then the power of current control loop control xenon lamp; If being lower than, current value presets the threshold values maximum level, the power of power control circuit control xenon lamp.
Fig. 4 is the flow chart according to the preferred high-intensity discharge lamp control method of the embodiment of the invention
As shown in Figure 4, this preferred high-intensity discharge lamp control method comprises the steps:
Step S401 when modulating voltage during less than or equal to the first threshold values Value1, compares modulating voltage and threshold voltage Value2, judges whether V＞Value2 sets up, when modulating voltage V more than or equal to Value2, change step S403 over to, otherwise, change step S402 over to.
Step S402 enters permanent power process.
Step S403 judges whether timing time reaches Preset Time, judges namely whether is timing this moment.If reach Preset Time, enter step S405, otherwise, change step 404 over to.
Step S404, variable frequency control and fall the power process
Step S405, permanent power process and critical conduction mode control
Step S406 judges whether break down this moment, if there is fault, enter step S407, otherwise, change step S405 over to.
Step S407, troubleshooting
Wherein, in the situation of feedback voltage greater than the second voltage threshold value, said method can also comprise: CPU element begins timing after constant power output control finishes; CPU element judges whether the time of timing arrives Preset Time; Arrive in the situation of Preset Time in the time of timing, CPU element is carried out critical conduction mode control; Do not arrive in the time of timing in the situation of Preset Time, CPU element is carried out variable frequency control.
Preferably, after the xenon lamp control system was stable, according to Fig. 4 flow process, duty ratio or frequency that the grid that drives by real-time fine setting MOS drives made the xenon lamp control system be operated in critical conduction mode.Critical conduction mode realizes by indirect detection boosting unit transformer secondary current, and when detecting the secondary current electric current and be zero, the grid that MOS is driven drives as high, and namely switch is under critical conduction mode.
Fig. 5 is the schematic diagram according to the control system of the preferred high-intensity discharge lamp of the embodiment of the invention.
As shown in Figure 5, this high-intensity discharge lamp control system comprises: CPU element 1, power subsystem 2, high-tension ignition unit 6, boosting unit 4, feedback unit 3, full-bridge output unit 5 and lamp unit 7.
Wherein, power subsystem 1 provides power supply; High-tension ignition unit 6 is electrically connected with high-intensity discharge lamp and power subsystem 1, for the high-intensity discharge lamp igniting provides voltage; Boosting unit 4 is connected with the high-tension ignition unit with power subsystem, the voltage that power subsystem 1 the is provided processing of boosting, and the voltage after will boosting offers high-tension ignition unit 6; Feedback unit 3 is connected with boosting unit 4, and Voltage Feedback and/or the current feedback relevant with boosting unit 4 is provided; CPU element is connected with feedback unit with boosting unit 4 and is connected, and controls boosting unit 4 according to Voltage Feedback and/or current feedback that feedback unit 3 provides.
Power subsystem 2 provides power supply; High-tension ignition unit 6 is electrically connected with high-intensity discharge lamp and power subsystem 2, for the high-intensity discharge lamp igniting provides voltage; Boosting unit 4 is connected with high-tension ignition unit 6 with power subsystem 2, the voltage that power subsystem 2 the is provided processing of boosting, and the voltage after will boosting offers high-tension ignition unit 6; Feedback unit 3 is connected with boosting unit, and Voltage Feedback and/or the current feedback relevant with boosting unit is provided; Wherein, feedback unit 3 also comprises modulate circuit 15, and Voltage Feedback and/or current feedback are nursed one's health.
CPU element 1 comprises single-chip microcomputer digital signal processor (Digital SignalProcessing is referred to as DSP) and peripheral circuit, download circuit; Power supply power supply 2 comprises electric source filter circuit, the power supply of single-chip microcomputer and MOS driving power; Feedback unit 3 comprises Voltage Feedback and current feedback; Boosting unit 4 comprises transformer, MOS and drive circuit; Full-bridge output unit 5 comprises that full-bridge drives chip and protective circuit; High-tension ignition unit 6 comprises high-voltage output circuit and charging current limiter resistance; Lamp unit 7 comprises xenon lamp, shielded cable, high voltage package.
Wherein, power subsystem 2 provides power supply and the MOS driving power of single-chip microcomputer, the voltage and current feedback that CPU element 1 provides according to feedback unit 3, control and driving boosting unit 4, produce the required voltage of full-bridge output unit 5 and high-tension ignition unit 6, full-bridge output unit 5 and high-tension ignition unit 6 drives lamp unit 7, realize xenon lamp igniting, restart and stable operation.
Above-mentioned high-intensity discharge lamp control system comprises Based Intelligent Control and critical conduction mode control model, wherein, Based Intelligent Control comprises CPU element 1, power subsystem 2, feedback unit 3, boosting unit 4 and full-bridge driver output unit 5, power subsystem 2 produces the power supply of CPU element 1 and full-bridge driver output unit 5, boosting unit 4 produces the input voltage that drives high-tension ignition unit 6 and full-bridge driver output unit 5, and the output of full-bridge driver output unit 5 is used for driving lamp driver element 7.Feedback unit 3 reponse system input voltages, output voltage, output current, CPU element comprises CPU or DSP single-chip microcomputer, CPU element is according to the feedback adjusting intelligent control algorithm of feedback unit 3, output control boosting unit 4 and full-bridge driver output unit 5, CPU control comprises Current Control feedback loop and feedback power control loop, if being in, electric current presets the threshold values maximum level, then the power of current control loop control xenon lamp; If being lower than, current value presets the threshold values maximum level, the power of power control circuit control xenon lamp.The Based Intelligent Control control algolithm can feedback unit 3 feedback parameter different, distinguish cold and hot lamp and control in conjunction with different control algolithms.
Above-mentioned Based Intelligent Control also comprises variable frequency control and critical conduction mode control, if being lower than, current value presets the threshold values maximum level, the power of power control circuit control xenon lamp, variable frequency control is according to the feedback of feedback unit 3, draw different control frequencys and other parameter by algorithm, power by power control circuit control xenon lamp, critical conduction mode control realizes soft switch control, feedback according to feedback unit 3, Based Intelligent Control obtains MOS turn-on and turn-off opportunitys, in conjunction with variable frequency control, realize critical conduction mode control.
Native system comprises electronic control unit (Electronic Control Unit is referred to as ECU) controller, connects connecting line, xenon lamp and the high-tension ignition voltage generation unit of ECU and xenon lamp.Wherein, the ECU controller comprises direct current (Driect Current is referred to as DC) boosting unit and input and output feedback unit and central processor unit (CenterProcessor Unit, referred to as CPU) control and with the DC boost conversion for driving interchange (the Alternate Current of high-intensity discharge lamp, referred to as AC) the full-bridge switch unit of voltage, the DC boosting unit can be produced by transformer secondary or voltage-multiplying circuit and once boost, and produces ignition voltage by secondary transformer again.The input and output feedback unit comprises the output voltage feedback, output current feedback, input voltage feedback; CPU control and other unit also comprise anti-swash Voltage-output locking and protected location.
In the present invention, the ECU controller has been realized the Based Intelligent Control of HID and the Critical Control of anti exciting converter; Input and output feedback unit and CPU control have realized igniting, burning lamp and the control of permanent power of xenon lamp; CPU control adopts the control of frequency conversion variable duty cycle that loss is reduced, and heating reduces, and electromagnetic interference (Electro Magnetic Interference is referred to as EMI) reduces, and reduces simultaneously the EMI number of elements.
In the present invention, CPU control can be distinguished cold and hot lamp and control in conjunction with different control algolithms, feedback unit 3 detects output voltage, and distinguish cold and hot lamp according to characteristics such as the different voltage of cold and hot lamp after the lamp igniting, electric currents, in conjunction with the characteristic of lamp starting resistor, starting current, optimize and start sequential, and adopt different control strategies to control, startup, again igniting to adapt to cold and hot lamp realize cold and hot lamp control.The ECU controling appliance has ignition mode, and lamp pattern and stable operation pattern are burnt in preheating.Its controller further comprises preheating mode, the error protection pattern, and thermolamp is ignition mode again, and the high pressure xenon gas lamp is used to automobile.
In the present invention, CPU control comprises Current Control feedback loop and feedback power control loop, the feedback power control loop is carried out drawing after the computing through CPU by current feedback loop and voltage feedback loop, if being in, electric current presets the threshold values maximum level, then the power of current control loop control xenon lamp; If being lower than, current value presets the threshold values maximum level, the power of power control circuit control xenon lamp.Wherein, error protection comprises connecting line and xenon lamp open circuit or the short circuit of input overvoltage, input undervoltage, xenon lamp; when the feedback of voltage feedback unit, current feedback unit occurs when unusual; can judge input overvoltage, input undervoltage by CPU; overcurrent or lamp open circuit, and turn-off output or change control algolithm and protect.
In the present invention, the present invention is optimized control to new and old lamp and different lamp, specific implementation is, new and old lamp and different lamps, after the igniting and voltage, electric current in the lamp warm different, for different voltage-current curves, control system adopts different control algolithm control, has realized the Adaptive Control of different lamps and new and old lamp.
Be described in detail below in conjunction with the implementation procedure of example to the embodiment of the invention.
Fig. 6 is the electric structural representation according to the high-intensity discharge lamp control system of the embodiment of the invention.
As shown in Figure 6, filter circuit 10 comprises inductance, electric capacity; MOS drives and locking circuit 11 comprises that MOS drives chip, drives current-limiting resistance and locking protective circuit; CPU element 12 comprises dsp chip and peripheral circuit; Voltage-multiplying circuit 13 comprises high voltage generation circuit and igniting current-limiting resistance; The electricity structure chart also comprises transformer unit 14, and modulate circuit 15 comprises input voltage Acquisition Circuit, output voltage and current collection circuit and operational amplifier modulate circuit; Bridge driver element 16 comprises that full-bridge drives chip and peripheral circuit.
Preferably, modulate circuit 15 comprises: the first resistance, the second resistance, the first operational amplifier, the first capacitor, wherein, the first input end of the first operational amplifier is connected to power supply, the second input of the first operational amplifier is via the first grounding through resistance, and the first capacitor and the second resistance are parallel between the output and first input end of the first operational amplifier.
As shown in Figure 5 and Figure 6, wherein, boosting unit 4 comprises driving and locking circuit 11, voltage-multiplying circuit 13 and transformer and low side MOS unit 14, drives and locking circuit 11 driving low side MOS, produces booster voltage through transformer; Be feedback unit 3 in the dotted line frame, be respectively the feedback of input voltage, output voltage, output current, feedback is to obtain by ohmically voltage dividing potential drop, and these voltages are through modulate circuits conditioning, gathers laggard line algorithm processing by the DSP of CPU element 1; Boosting unit 4 comprises voltage-multiplying circuit 13 and unit 14 and metal-oxide-semiconductor and metal-oxide-semiconductor driving locking circuit; High-tension ignition unit 6 is made of together the Voltage-output of multiplication of voltage generation unit 13 and transformer unit 14.
The present invention has the voltage adaptation that starts and light a fire under the different voltages, modulate circuit unit 15 is except Voltage Feedback and current feedback, also nurse one's health input voltage signal, according to different supply voltages, by Optimal Control Strategy, different start-up parameter and ignition parameter again are set, realize the adaptability under the different voltages, reduce loss and caloric value, improved reliability.
Fig. 7 is the structural representation according to the driving of the embodiment of the invention and locking circuit.
As shown in Figure 7, drive unit drives MOS unit in driving and the locking circuit 11, the locking circuit comprises Voltage Feedback 21, Voltage Feedback and reference voltage 22 are relatively, through comparing unit 18 relatively after, drive 20 unit Q100, MOS driver element 19 is driven through resistance R 200 by the IO of CPU element 17, as output voltage DC_OUT during less than set point, rate of exchange device unit 18 is output as low, Q100 cut-off, the MOS drive circuit is driven by CPU, as output voltage DC_OUT during greater than set point, comparator unit 18 is output as height, the Q100 conducting is forbidden CPU element to the driver output of MOS driver element, realizes the voltage latch functions.
Wherein, above-mentioned driving and locking circuit comprise: processing module; The MOS driver element; Comparing unit; Drive triode, wherein, an input of comparing unit is connected to boosting unit via the 3rd resistance, and another input is connected to power subsystem via the 4th resistance, and output is connected to the driving triode; An output that drives triode is connected to the MOS driver element, and is connected with processing module by the 5th resistance.
Fig. 8 is the schematic diagram according to the filter circuit of the embodiment of the invention.
As shown in Figure 8, the power filter structure chart comprises the notch filter that wiring inductance and capacitor C 100 consist of, notch filter forms the LC filter by inductance and electric capacity, inductance utilizes the equivalence of PCB cabling to form inductance, and capacitor C 100 formation filters, forms resonance under characteristic frequency, the external power source input is behind notch filter, external power source disturbs near the interference resonance frequency, can be decayed by notch filter, realizes external power source characteristic frequency interference filter; MOS switch element 24 forms near switching frequency external power source is disturbed, behind notch filter, the MOS switch is near the interference of external power source interference switching frequency, can be decayed by notch filter, realization is to MOS switch characteristic frequency interference filter, namely realize near the notch filter the controller switches frequency, reduce controller to the radiated interference of outside.Power filter also comprises inductance L 100 and capacitor C 200, C300, wherein, inductance L 100 and capacitor C 200, C300, consist of the ∏ mode filter, the ∏ mode filter is low pass filter, and external power source is inputted behind the ∏ mode filter, and external power source disturbs the interference more than lowpass frequency, can be decayed by the ∏ mode filter, realize the above interference filter of external power source characteristic frequency; What controller unit formed disturbs external power source, behind the ∏ mode filter, what controller unit formed disturbs interference more than lowpass frequency to external power source, can be decayed by the ∏ mode filter, that realizes that controller unit forms disturbs interference filter more than lowpass frequency to external power source, reduce controller to the radiated interference of outside, realize the filtering on the power line, further reduce conducted interference.
Above-mentioned filter circuit can comprise: the first electric capacity, the second electric capacity, the 3rd electric capacity, wiring inductance, and wherein, the first electric capacity and wiring inductance series connection consist of the LC filter; The second electric capacity, the 3rd electric capacity and the second inductor consist of the ∏ mode filter.
Preferably, the ∏ mode filter is low pass filter.
Fig. 9 is the schematic diagram according to the preferred voltage modulate circuit of the embodiment of the invention.
As shown in Figure 9, modulate circuit according to present embodiment comprises: the 4th resistance, the 5th resistance, the first operational amplifier, the first capacitor, wherein, the first input end of the first operational amplifier is connected to power supply, the second input of the first operational amplifier is via the 4th grounding through resistance, and the first capacitor and the 5th resistance are parallel between the output and first input end of the first operational amplifier.
The modulate circuit of input voltage and output voltage can be as shown in Figure 6, and different is the diode that the input voltage modulate circuit does not have the input of catching among the figure and connects.
After input voltage and output voltage process resistance R 100, the R101 dividing potential drop, produce voltage acquisition among the figure, voltage acquisition is nursed one's health through resistance R 102, R103, capacitor C 102 and operational amplifier U100, produce the voltage sample conditioning output shown in the figure, this voltage sample conditioning output participates in the control algolithm computing after CPU element gathers.
Voltage sample conditioning output produces voltage sample and catches input behind diode D100, voltage sample is caught and failed after CPU element is caught, and can carry out state variation, participates in the control algolithm computing.
Figure 10 is the schematic diagram according to the preferred current regulating circuit of the embodiment of the invention.
As shown in figure 10, current regulating circuit according to the embodiment of the invention comprises: the 8th resistance, the 9th resistance, the tenth resistance, the 11 resistance, the second operational amplifier, the second capacitor and inductance, wherein, an input of inductance is via the 8th grounding through resistance, and the other end is via the second capacitor grounding and be connected to the first input end of the second operational amplifier via the 9th resistance; The second input of the second operational amplifier is via the 11 grounding through resistance; The tenth resistance is parallel between the first input end and output of the second operational amplifier.
The current feedback acquisition and conditioning circuit can be as shown in Figure 7, current feedback is after resistance R 106, produce current sample voltage shown in the figure, inductance L 100, capacitor C 104 are filter circuit, carrying out filtered voltage nurses one's health through resistance R 106, R107, R108, capacitor C 103 and operational amplifier U101, produce the current sample conditioning output shown in the figure, this current sample conditioning output participates in the control algolithm computing after CPU element gathers.
CPU element 1 is carried out the algorithm computing according to the voltage and current feedback that voltage modulate circuit and current regulating circuit provide, electric current loop, Voltage loop and power control, and drive boosting unit 4, produce the required voltage of full-bridge output unit 5 and high-tension ignition unit 6.
CPU control comprises Current Control feedback loop and feedback power control loop, the feedback power control loop is carried out drawing after the computing through CPU by current feedback loop and voltage feedback loop, if being in, electric current presets the threshold values maximum level, then the power of current control loop control xenon lamp; If being lower than, current value presets the threshold values maximum level, the power of power control circuit control xenon lamp.
The voltage and current modulate circuit can also be realized failure diagnosis and protection after the CPU element computing; failure diagnosis and protection comprise input overvoltage, input undervoltage; when the feedback of voltage feedback unit, current feedback unit occurs when unusual; can judge input overvoltage, input undervoltage by CPU; overcurrent or lamp open circuit, and turn-off output or change control algolithm and protect.
The vehicle xenon lamp control system can be optimized control to new and old lamp and different lamp, specific implementation is, new and old lamp and different lamps, after the igniting and voltage, the electric current of the output of voltage modulate circuit and current regulating circuit in the lamp warm different, for different voltage-current curves, control system adopts different control algolithm control, has realized the Adaptive Control of different lamps and new and old lamp.
The vehicle xenon lamp control system has the voltage adaptation that starts and light a fire under the different voltages, modulate circuit unit 15 is except Voltage Feedback and current feedback, also nurse one's health input voltage signal, according to different supply voltages, by Optimal Control Strategy, different start-up parameter and ignition parameter again are set, realize the adaptability under the different voltages, reduce loss and caloric value, improved reliability.
According to the embodiment of the invention, provide a kind of control device of high-intensity discharge lamp.
Figure 11 is the schematic diagram according to the control device of the high-intensity discharge lamp of the embodiment of the invention.
As shown in figure 11, this device comprises: acquisition module 1101, the first judge module 1102, the first control module 1103, the second judge module 1104 and the second control module 1105.
Wherein, acquisition module 1101 is used for obtaining the feedback voltage about high-intensity discharge lamp from feedback unit; The first judge module 1102 is used for judging that whether feedback voltage is greater than the first voltage threshold; The first control module 1103 is used in the situation of feedback voltage less than or equal to the first voltage threshold, and high-intensity discharge lamp is carried out constant current output control; The second judge module 1104 is used for judging that whether feedback voltage is greater than the second voltage threshold value; The second control module 1105 is used in the situation of feedback voltage less than or equal to the second voltage threshold value, and high-intensity discharge lamp is carried out constant power output control.
It below only is preferred implementation of the present invention; should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle of the invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
As can be seen from the above description, the present invention has realized following technique effect:
1, overall power and caloric value have been reduced.
The purpose of this invention is to provide a kind of automotive HID system, the critical conduction mode control that realizes Based Intelligent Control and instead swash variator has reduced overall power and caloric value, has improved efficient.
2, realized the output voltage locking, protection rear end components and parts have improved component reliability and useful life.
Because the present invention instead swashs the protection of variator output voltage locking, has realized the output voltage locking, protection transformer and rear end components and parts have improved component reliability and useful life.
3, realized adaptability under the different voltages.
According to different supply voltages, by Optimal Control Strategy, realize the adaptability under the different voltages, reduced loss and caloric value, improved reliability.
4, adopt variable frequency control, reduce loss and radiation.
5, adopt the design of power import notch filter, reduce the conduction emission and disturb.
6, can nurse one's health Voltage Feedback and current feedback better.
7, solved stable poor problem.
In sum, the present invention can solve simultaneously that existing xenon lamp systems loss is large, heating is large, and voltage adaptation is poor, the problems such as cold and hot lamp and different lamp bad adaptability.The purpose of this invention is to provide a kind of vehicle xenon lamp control system, the critical conduction mode control that realizes Based Intelligent Control and instead swash variator has reduced overall power and caloric value, has improved efficient; Comparing with traditional headlight has that brightness is high, high, the energy-conservation advantage of efficient.
Need to prove, can in the computer system such as one group of computer executable instructions, carry out in the step shown in the flow chart of accompanying drawing, and, although there is shown logical order in flow process, but in some cases, can carry out step shown or that describe with the order that is different from herein.
Obviously, those skilled in the art should be understood that, above-mentioned each module of the present invention or each step can realize with general calculation element, they can concentrate on the single calculation element, perhaps be distributed on the network that a plurality of calculation elements form, alternatively, they can be realized with the executable program code of calculation element, thereby, they can be stored in the storage device and be carried out by calculation element, perhaps they are made into respectively each integrated circuit modules, perhaps a plurality of modules in them or step are made into the single integrated circuit module and realize.Like this, the present invention is not restricted to any specific hardware and software combination.
The above is the preferred embodiments of the present invention only, is not limited to the present invention, and for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any modification of doing, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (9)
1. the control method of a high-intensity discharge lamp is characterized in that, comprising:
CPU element is obtained the feedback voltage about described high-intensity discharge lamp from feedback unit;
Described CPU element judges that whether described feedback voltage is greater than the first voltage threshold;
In the situation of described feedback voltage less than or equal to described the first voltage threshold, described CPU element is carried out constant current output control to described high-intensity discharge lamp;
In the situation of described feedback voltage greater than described the first voltage threshold, described CPU element judges that whether described feedback voltage is greater than the second voltage threshold value;
In the situation of described feedback voltage less than or equal to described second voltage threshold value, described CPU element is carried out constant power output control to described high-intensity discharge lamp,
Wherein, in the situation of described feedback voltage greater than described second voltage threshold value, described method also comprises:
Described CPU element begins timing after described constant power output control finishes;
Described CPU element judges whether the time of described timing arrives Preset Time;
Arrive in the time of described timing in the situation of described Preset Time, described CPU element is carried out critical conduction mode control;
Do not arrive in the time of described timing in the situation of described Preset Time, described CPU element is carried out variable frequency control.
2. method according to claim 1 is characterized in that, described CPU element is carried out critical conduction mode control and comprised:
Described CPU element is come duty ratio or frequency that the grid of MOS driver drives are adjusted according to the difference of the feedback parameter of the current feedback in the described feedback unit and/or Voltage Feedback.
3. method according to claim 1 is characterized in that, after described CPU element was carried out constant power output control, described method also comprised:
Described CPU element judges whether the input of described high-intensity discharge lamp and/or output exist fault;
In the situation that there is fault in input and/or the output of described high-intensity discharge lamp, then described CPU element is processed accordingly to described fault;
Input and/or output at described high-intensity discharge lamp do not exist in the situation of fault, and then described CPU element is proceeded constant power output control.
4. each described method in 3 according to claim 1 is characterized in that, in described CPU element described high-intensity discharge lamp is carried out constant current output control and comprises:
Described CPU element is obtained the feedback current from feedback unit;
Described CPU element obtains current error according to described feedback current and reference current;
Described CPU element is adjusted the electric current of boosting unit according to described current error.
5. the control device of a high-intensity discharge lamp is characterized in that, comprising:
Acquisition module is used for obtaining the feedback voltage about described high-intensity discharge lamp from feedback unit;
The first judge module is used for judging that whether described feedback voltage is greater than the first voltage threshold;
The first control module is used in the situation of described feedback voltage less than or equal to described the first voltage threshold, and described high-intensity discharge lamp is carried out constant current output control;
The second judge module is used for judging that whether described feedback voltage is greater than the second voltage threshold value in the situation of described feedback voltage greater than described the first voltage threshold;
The second control module is used in the situation of described feedback voltage less than or equal to described second voltage threshold value, and described high-intensity discharge lamp is carried out constant power output control,
Timing module is used in the situation of described feedback voltage greater than described second voltage threshold value, begins timing after described constant power output control finishes;
The 3rd judge module is used for judging whether the time of described timing arrives Preset Time;
The 3rd control module is used for arriving in the situation of described Preset Time in the time of described timing, and described CPU element is carried out critical conduction mode control;
The 4th control module is used for not arriving in the situation of described Preset Time in the time of described timing, and described CPU element is carried out variable frequency control.
6. the control system of a high-intensity discharge lamp is characterized in that, comprising:
Power subsystem provides power supply;
The high-tension ignition unit is electrically connected with high-intensity discharge lamp and described power subsystem, for described high-intensity discharge lamp igniting provides voltage;
Boosting unit is connected with described high-tension ignition unit with described power subsystem, the voltage that described power subsystem the is provided processing of boosting, and the voltage after will boosting offers described high-tension ignition unit;
Feedback unit is connected with described boosting unit, and Voltage Feedback and/or the current feedback relevant with described boosting unit is provided;
CPU element, with described boosting unit be connected feedback unit and be connected, be used for enforcement of rights and require each described method of 1-4, control described boosting unit according to described Voltage Feedback and/or described current feedback that described feedback unit provides.
7. control system according to claim 6 is characterized in that, described feedback unit also comprises modulate circuit, and wherein, described modulate circuit comprises:
The first resistance, the second resistance, the first operational amplifier, the first capacitor, wherein,
The first input end of described the first operational amplifier is connected to power supply, the second input of described the first operational amplifier is via the first grounding through resistance, and described the first capacitor and described the second resistance are parallel between the output and described first input end of described the first operational amplifier.
8. control system according to claim 6 is characterized in that, described boosting unit comprises driving and locking circuit, when output voltage surpasses predetermined threshold, described output voltage is carried out locking, and wherein, described driving and locking circuit comprise:
Processing module, MOS driver element, comparing unit, driving triode, wherein,
An input of described comparing unit is connected to described boosting unit via the 3rd resistance, and another input is connected to power subsystem via the 4th resistance, and output is connected to described driving triode;
An output of described driving triode is connected to described MOS driver element, and is connected with described processing module by the 5th resistance.
9. control system according to claim 6 is characterized in that, described power subsystem comprises filter circuit, and the power supply that described power subsystem is provided carries out the filtering processing, and wherein, described filter circuit comprises:
The first electric capacity, the second electric capacity, the 3rd electric capacity, wiring inductance, wherein,
Described the first electric capacity and the series connection of described wiring inductance consist of the LC filter;
Described the second electric capacity, described the 3rd electric capacity and the second inductor consist of the ∏ mode filter.
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| CN102595685B (en) * | 2011-01-05 | 2016-01-06 | 上海米开罗那机电技术有限公司 | A kind of equipment of improving performances of automotive head lamp |
| CN102752946B (en) * | 2012-07-12 | 2014-09-10 | 北京经纬恒润科技有限公司 | Discharge lamp starting circuit and starting method |
| CN105430854B (en) | 2015-10-29 | 2019-03-19 | 广州萃智信息科技有限公司 | A kind of starter and its method of CDM lamp |
| CN105376917B (en) * | 2015-12-24 | 2018-05-01 | 杭州士兰微电子股份有限公司 | HID lamp controller, HID lamp drive system and driving method |
| CN108459554A (en) * | 2018-03-21 | 2018-08-28 | 桂林市华茂欧特科技有限公司 | A method of the high-speed pulse output duty ratio adjust automatically based on CPLD |
| CN112105109B (en) * | 2020-09-22 | 2023-05-26 | 许昌学院 | New energy plant lamp control system |
| CN112074032A (en) * | 2020-09-22 | 2020-12-11 | 许昌学院 | New energy plant lamp for plant cultivation room |
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