CN203340390U - Power supply circuit of HID lamp - Google Patents
Power supply circuit of HID lamp Download PDFInfo
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- CN203340390U CN203340390U CN2013204041995U CN201320404199U CN203340390U CN 203340390 U CN203340390 U CN 203340390U CN 2013204041995 U CN2013204041995 U CN 2013204041995U CN 201320404199 U CN201320404199 U CN 201320404199U CN 203340390 U CN203340390 U CN 203340390U
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Abstract
The utility model provides a power supply circuit of a HID lamp. The power supply circuit comprises a first voltage-transformation module and a second voltage-transformation module, and the first voltage-transformation module and the second voltage-transformation module are used to control voltage output time and allow a DC voltage of an input DC power to be converted into a PWM type square-wave voltage; the first voltage-transformation module and the second voltage-transformation module are respectively parallel to two ends of the input DC power; the first voltage-transformation module and the second voltage-transformation module are taken as a lighting power to power supply a load in turn; and the first voltage-transformation module provides power for the load to form a first loop, and the second voltage-transformation module provides power for the load to form a second loop. The power supply circuit further comprises a switch element Q3 and a switch element Q2, the switch element Q3 is disposed on the first loop and used to control the first loop to be switched on and off, and the switch element Q2 is disposed on the second loop and used to control the second loop to be switched on and off; and one end of a conductive channel terminal of Q2 is connected with a negative end of the lighting power, one end of a conductive channel terminal of Q3 is also connected with the negative end of the lighting power, and the other ends of the conductive channel terminals of Q2 and Q3 are respectively connected with the first voltage-transformation module and the second voltage-transformation module. The circuit has high reliability and can allow a lamp tube to work in a stable, flicker-free and jittery state.
Description
Technical field
The utility model relates to the high-intensity gas discharge lamp technical field, more particularly, relates to a kind of power supply of high-intensity gas discharge lamp.
Background technology
The HID lamp, be called again high-intensity gas discharge lamp, and this class lamp need to be operated under the voltage of lower frequency could steady operation (as frequency lower than 1kHz), works under the high frequency condition of power supply optical flare jitter phenomenon easily occurs, as the acoustic resonance phenomenon.
Ripe HID lamp power supply in the market mainly contains full-bridge circuit, BUCK half-bridge circuit, three kinds of schemes of Inductive ballast:
1, full-bridge circuit: full-bridge circuit is comprised of four switch elements, and full-bridge circuit can be good at providing the interchange low frequency operation voltage (as the PWM square-wave voltage) of HID lamp, and Dead Time is short, and light is stable; Because lamp is to be series in the middle of upper and lower arm bridge switch element, as shown in Figure 1; Circuit impedance is little, and when lamp starts, electric current and power are larger, be particularly suitable for needing lamp to start after the luminous flux application scenario fast of rising, as HID traffic lights such as automobile, trains, the starting power of lamp is greater than steady operation power;
2, BUCK half-bridge circuit: sort circuit is applied common commercial, industrial lighting at present, and after lamp starts, power is generally slowly with the characteristic variations of lamp, to rise to rated power, and luminous flux is also by the low normal value that rises to; Lamp can be realized low frequency work, and light is stable;
3, Inductive ballast: a kind of ballast be series between AC power and lamp, starting back light power is also from little, with modulation characteristic, rises to rated power, and luminous flux is also to rise to normal value by low, and the lamp operating frequency is the alternating current input power supplying frequency; The light of lighting a lamp under 50/60Hz frequency civil power has slight flashing, and lamp power changes with the variation of input voltage.
The operation principle of existing full-bridge circuit is: Q2 is bridge low-end switch element, driving voltage is by the LO port output of chip, the LO driving voltage of chip internal comes from low-tension supply VCC(and is generally direct current 9-15V), when the Q2 conducting, Q1 and Q4 turn-off, the Q3 conducting, point modulating voltage HV is applied on the HID lamp through Q3, ignition coil, HID lamp, Q2, and DC1 is low level.Due to the conducting of Q2, the source S of Q1 is also received low level (GND) on the ground by Q2, and low-tension supply VCC is through chip internal D(diode or circuit) charged to capacitor C 2, after being full of, the voltage on C2 approaches the VCC magnitude of voltage.When lamp needs the electric current commutation, Q2 and Q3 turn-off, because the voltage low level end on capacitor C 2 (electric capacity lower end) is the VS of DC1(chip internal), high-end drive circuit in chip is applied to the voltage of C2 on the grid G and source S of Q1 by the output of HO port, Q1 is open-minded, and some modulating voltage HV is applied to the HID lamp through Q1, HID lamp, ignition coil, Q4.The amount of capacity of capacitor C 2 depends on parameter and the service time of switch element Q1, guarantees that Q1 can provide enough driving forces during opening.The overlapping conducting of above-mentioned Q1 and Q4 and Q3 and Q2 has formed low-impedance modulating voltage/current circuit, makes modulating voltage/electric current form the PWM square wave, guarantees the steady operation of lamp.
Also existing following problem in existing full-bridge circuit: 1, when the igniting of HID lamp single or multiple and abnormal conditions occur, the VS of DC1(chip internal) positive high voltage pulse or the negative high voltage pulse (being produced by ignition coil) of the withstand voltage limit of chip inevitably appear being greater than in end; Just/negative high voltage pulse is impacted drive circuit at chip internal VS end, and easily overvoltage damages the high/low end drive circuit of chip; 2, the driving voltage (charging voltage value approaches VCC) due to switch element Q1 needs capacitor C 2 to control to provide through high-end drive circuit, because of igniting and abnormal conditions, (just/negative high voltage pulse) when unstable appears at DC1 end, voltage on capacitor C 2 too can be with DC1(chip internal VS) the voltage transformation changes, with regard to causing Q1 to make between grid G/ source S under-voltagely or too high because of HO overtension/low during will opening or open, cause switch element Q1 to damage like this; 3, the proper high-voltage pulse of DC1 or negative high voltage pulse form a voltage difference in source S and the drain D of Q1, easily cause Q1 leakage/source (D/S) over-voltage breakdown; In like manner, Q3 also exists the problems referred to above.Therefore, when driving and in working order, in unsettled situation, Q1, Q3 and driving chip easily damage.
Solution in the market is: the protection device that absorbs high pressure in parallel on two mid point DC1 of bridge and DC2 and 4 switch elements, and as electric capacity, TVS, piezo-resistance etc. and series connection suppress the inductance/thermistor etc. of peak voltage/electric current.But this solution has hysteresis quality in time by the method absorbed and suppress the igniting high pressure, and absorb and to suppress magnitude of voltage unstable, randomness is arranged.Whole life period ignition voltage at lamp is change at random, fixing absorption/inhibition parameter can't ensure the safety of circuit fully, therefore use in the electric ballast of full-bridge circuit, it is the most often to occur during electric ballast damages that the full-bridge circuit switch element damages, and has influence on the development of electric ballast.
The utility model content
The purpose of this utility model is to overcome shortcoming of the prior art with not enough, and a kind of HID lamp power circuit is provided, and is connected on the two ends of HID lamp load outward, and circuit reliability is high, can make fluorescent tube flicker free shake ground steady operation.
In order to achieve the above object, the utility model adopts following technical scheme: a kind of HID lamp power circuit, comprise the PWM control module, and also comprise:
For controlling the Voltage-output time, make the direct voltage of input DC power convert the first voltage changing module and second voltage changing module of PWM type square-wave voltage to; Described the first voltage changing module and the second voltage changing module are parallel to respectively the input DC power two ends; By the first voltage changing module and the second voltage changing module, as the power supply of lighting a lamp, be load supplying in turn; By the first voltage changing module, being that load supplying forms the first loop, is that load supplying forms second servo loop by the second voltage changing module;
And be arranged on the first loop, for the switch element Q3 that controls the first loop break-make and be arranged on second servo loop, for controlling the switch element Q2 of second servo loop break-make; One end of the conductive channel end of Q2 and Q3 all is connected with the negative terminal of the power supply of lighting a lamp, and the other end is connected with the second voltage changing module with the first voltage changing module respectively;
Described PWM control module is connected with the first voltage changing module, the second voltage changing module, Q2 and Q3 signal respectively.
With full-bridge circuit, compare, the utility model power supply circuits are cancelled two upper pipes of full-bridge circuit, thereby have avoided on the full-bridge circuit pipe because of the high and breakdown damage of ignition voltage; Power supply circuits only adopt manages Q2, Q3 under two of full-bridge circuit and realizes the HID lamp power circuit, and manage the low side of managing press/pipe stream when Q2, Q3 all are arranged on lamp work under two, adopt low voltage drive, Q2, Q3 are connected on same current potential, using and light a lamp the negative pole current potential of power supply as the benchmark of driving voltage, so circuit reliability is high.
Further scheme is: described switch element Q2 and Q3 adopt N-type metal-oxide-semiconductor, P type metal-oxide-semiconductor, IGBT, N-type BJT or P type BJT; Adopt the N-type metal-oxide-semiconductor to refer to, the S utmost point of N-type metal-oxide-semiconductor is connected with the negative terminal of the power supply of lighting a lamp, and the D utmost point is connected with the first voltage changing module or the second voltage changing module, and the G utmost point is connected with the PWM control module; Adopt P type metal-oxide-semiconductor to refer to, the D utmost point of P type metal-oxide-semiconductor is connected with the negative terminal of the power supply of lighting a lamp, and the S utmost point is connected with the first voltage changing module or the second voltage changing module, and the G utmost point is connected with the PWM control module; Adopt IGBT to refer to, the E utmost point of IGBT is connected with the negative terminal of the power supply of lighting a lamp, and the C utmost point is connected with the first voltage changing module or the second voltage changing module, and the G utmost point is connected with the PWM control module; Adopt N-type BJT to refer to, the E utmost point of N-type BJT is connected with the negative terminal of the power supply of lighting a lamp, and the C utmost point is connected with the first voltage changing module or the second voltage changing module, and the B utmost point is connected with the PWM control module; Adopt P type BJT to refer to, the C utmost point of P type BJT is connected with the negative terminal of the power supply of lighting a lamp, and the E utmost point is connected with the first voltage changing module or the second voltage changing module, and the B utmost point is connected with the PWM control module.
One of them scheme of the first voltage changing module is: described the first voltage changing module comprises transformer T1, and T1 is elementary is parallel to the input DC power two ends by positive flyback circuit, half-bridge circuit, any circuit of recommending in circuit and full-bridge circuit; T1 time level is connected with load by halfwave rectifier circuit or bridge rectifier circuit; T1 time the level and load between also be provided with filter circuit; The other end of the conductive channel end of Q2 is connected and refers to the first voltage changing module, and the other end of the conductive channel end of Q2 is connected on the follow-up circuit of described halfwave rectifier circuit or bridge rectifier circuit.
Described T1 is elementary to be parallel to the input DC power two ends by positive flyback circuit and to refer to, the first voltage changing module also comprises switch element Q1, the first elementary tie point of T1 is connected with the anode of input DC power, and the conductive channel end that the second elementary tie point of T1 passes through Q1 is connected with the negative terminal of input DC power; The Q1 control end is connected with PWM control module signal;
Described T1 is elementary to be parallel to the input DC power two ends by the half-bridge circuit and to refer to, the first voltage changing module also comprises switch element Q11, Q12 and capacitor C 41, C42, the conductive channel end of Q11 be parallel to the input DC power two ends after the conductive channel end of Q12 is connected, also be parallel to the input DC power two ends after C41 and C42 series connection simultaneously, the first elementary tie point of T1 is connected in the junction of C41 and C42, and the second elementary tie point of T1 is connected in the junction of Q11 and Q12; The control end of Q11 is connected with PWM control module signal respectively with the control end of Q12;
Described T1 is elementary to be parallel to the input DC power two ends and to refer to by recommending circuit, the first voltage changing module also comprises switch element Q11 and Q12, the conductive channel end that the first elementary tie point of T1 passes through Q11 is connected with the negative terminal of input DC power, the second elementary tie point of T1 is connected with the anode of input DC power, the conductive channel end that the 3rd elementary tie point of T1 passes through Q12 is connected with the negative terminal of input DC power, and the control end of Q11 is connected with PWM control module signal respectively with the control end of Q12;
Described T1 is elementary to be parallel to the input DC power two ends by the full-bridge circuit and to refer to, the first voltage changing module also comprises switch element Q11, Q12, Q13 and Q14, the conductive channel end of Q11 be parallel to the input DC power two ends after the conductive channel end of Q12 is connected, simultaneously the conductive channel end of Q13 be parallel to the input DC power two ends after the conductive channel end of Q14 is connected, the first elementary tie point of T1 is connected in the junction of Q13 and Q14, the second elementary tie point of T1 is connected in the junction of Q11 and Q12, the control end of Q11, the control end of Q12, the control end of Q13, the control end of Q14 is connected with PWM control module signal respectively.
The another kind of scheme of the first voltage changing module is: described the first voltage changing module comprises inductance L 1, switch element Q1, diode D1 and capacitor C 1; The anode of input DC power is connected with an end of the conductive channel end of Q1, and the other end of the conductive channel end of Q1 is connected with load by L1, and the control end of Q1 is connected with PWM control module signal; The negative electrode of D1 is connected in the junction of Q1 and L1, and the anode of D1 is connected with the negative terminal of input DC power, and the end of C1 is connected to the junction of load and L1, and the other end is connected with the negative terminal of input DC power.
Preferred scheme is: the structure of described the second voltage changing module is identical with the structure of the first voltage changing module.
Also comprise capacitor C 3, the two ends of C3 and load two ends are connected in parallel.
The utility model possesses following outstanding advantages and effect with respect to prior art:
1, the utility model power supply circuits are cancelled two upper pipes of full-bridge circuit, thereby have avoided on the full-bridge circuit pipe because of the high and breakdown damage of ignition voltage; Power supply circuits only adopt manages Q2, Q3 under two of full-bridge circuit and realizes the HID lamp power circuit, and manage the low side of managing press/pipe stream when Q2, Q3 all are arranged on lamp work under two, adopt low voltage drive, Q2, Q3 are connected on same current potential, using and light a lamp the negative pole current potential of power supply as the benchmark of driving voltage, so circuit reliability is high;
2, the utility model power supply circuits can make fluorescent tube flicker free shake ground steady operation;
3, the utility model power supply circuits, by the control of multiple signals, can realize that low frequency PWM square wave or high-frequency PWM square wave power voltage supply are to the HID lamp, can realize that the high-power or little electric current small-power of the large electric current of HID lamp starts simultaneously, and the lamp current impedance loop is low; Can meet dissimilar HID lamp and different starting characteristic mode/power requirement.
The accompanying drawing explanation
Fig. 1 is the existing circuit diagram that adopts the power supply of full-bridge circuit scheme;
Fig. 2 is the schematic diagram of embodiment mono-power supply circuits;
Fig. 3 is the operation principle schematic diagram of the utility model power supply circuits;
Fig. 4 is the schematic diagram of the another kind of scheme of embodiment mono-power supply circuits;
Fig. 5 is the schematic diagram of embodiment bis-power supply circuits;
Fig. 6 is the schematic diagram of embodiment tri-power supply circuits;
Fig. 7 is the schematic diagram of embodiment tetra-power supply circuits;
Fig. 8 is the schematic diagram of embodiment five power supply circuits;
Fig. 9 is that in the utility model power supply circuits, primary is parallel to the schematic diagram at input DC power two ends by the half-bridge circuit;
Figure 10 is that in the utility model power supply circuits, primary is parallel to the schematic diagram at input DC power two ends by recommending circuit;
Figure 11 is that in the utility model power supply circuits, primary is parallel to the schematic diagram at input DC power two ends by the full-bridge circuit;
Figure 12 is the schematic diagram that in the utility model power supply circuits, transformer secondary output is connected with load by the bridge rectifier circuit.
Embodiment
Below in conjunction with embodiment, the utility model is described in further detail, but execution mode of the present utility model is not limited to this.
Embodiment mono-
The present embodiment HID lamp power circuit, as shown in Figure 2; Comprise PWM control module, the first voltage changing module, the second voltage changing module and switch element Q2 and Q3.The first voltage changing module and the second voltage changing module are for controlling the Voltage-output time, making the direct voltage of input DC power convert PWM type square-wave voltage to; The first voltage changing module and the second voltage changing module are parallel to respectively the input DC power two ends, by the first voltage changing module and the second voltage changing module, as the power supply of lighting a lamp, are load supplying in turn; Load is composed in series by HID lamp and ignition coil; The first voltage changing module and the second voltage changing module be the two ends of external load respectively.By the first voltage changing module, being that load supplying forms the first loop, is that load supplying forms second servo loop by the second voltage changing module.Q3 is arranged on the first loop, for controlling the first loop break-make, Q2 is arranged on second servo loop, for controlling the second servo loop break-make; One end of the conductive channel end of Q2 and Q3 all is connected with the negative terminal of the power supply of lighting a lamp, and the other end is connected with the second voltage changing module with the first voltage changing module respectively.The PWM control module is connected with the first voltage changing module, the second voltage changing module, Q2 and Q3 signal respectively.The control module that the PWM control module can adopt microcomputer control module or analog circuit to form.The negative terminal of power supply of lighting a lamp can directly be connected with the negative terminal of input DC power as shown in Figure 2, also can disconnect with the negative terminal of input DC power, and make to light a lamp power supply and input DC power form isolation.
In Fig. 2, Q2 and Q3 adopt the N-type metal-oxide-semiconductor; The S utmost point of Q2 connects the negative terminal of the power supply of lighting a lamp, and the D utmost point connects the first voltage changing module, and the G utmost point is connected with PWM control module signal; The S utmost point of Q3 connects the negative terminal of the power supply of lighting a lamp, and the D utmost point connects the second voltage changing module, and the G utmost point is connected with PWM control module signal.
Q2 and Q3, except can adopting the N-type metal-oxide-semiconductor, also can adopt P type metal-oxide-semiconductor, IGBT, N-type BJT or P type BJT.Adopt P type metal-oxide-semiconductor to refer to, the D utmost point of P type metal-oxide-semiconductor is connected with the negative terminal of the power supply of lighting a lamp, and the S utmost point is connected with the first voltage changing module or the second voltage changing module, and the G utmost point is connected with the PWM control module; Adopt IGBT to refer to, the E utmost point of IGBT is connected with the negative terminal of the power supply of lighting a lamp, and the C utmost point is connected with the first voltage changing module or the second voltage changing module, and the G utmost point is connected with the PWM control module; Adopt N-type BJT to refer to, the E utmost point of N-type BJT is connected with the negative terminal of the power supply of lighting a lamp, and the C utmost point is connected with the first voltage changing module or the second voltage changing module, and the B utmost point is connected with the PWM control module; Adopt P type BJT to refer to, the C utmost point of P type BJT is connected with the negative terminal of the power supply of lighting a lamp, and the E utmost point is connected with the first voltage changing module or the second voltage changing module, and the B utmost point is connected with the PWM control module.
The first voltage changing module comprises transformer T1, switch element Q1, diode D1, T1 is elementary is parallel to the input DC power two ends by positive flyback circuit, concrete scheme is: the first elementary tie point of T1 is connected with the anode of input DC power, the conductive channel end that the second elementary tie point of T1 passes through Q1 is connected with the negative terminal of input DC power, Q1 adopts the N-type metal-oxide-semiconductor, the D utmost point of Q1 connects the second elementary tie point of T1, and the S utmost point connects the negative terminal of input DC power; The control end of Q1, the G utmost point, be connected with PWM control module signal.T1 time level is connected with an end of load by the halfwave rectifier circuit, concrete scheme is: the first tie point of T1 level is connected with load by D1, the first tie point of T1 level of the anodic bonding of D1, negative electrode connects load, and the second tie point of T1 level is connected with the negative terminal of the power supply of lighting a lamp.T1 time level is connected with an end of load by the halfwave rectifier circuit, also can adopt another kind of scheme: as shown in Figure 4, the first tie point of T1 level is connected with load, and the second tie point of T1 level is connected with the negative terminal of the power supply of lighting a lamp by D1; The light a lamp negative terminal of power supply of the anodic bonding of D1, negative electrode connects second tie point of T1 time grade.T1 time the level and load between also be provided with filter circuit, concrete scheme is: the first voltage changing module also comprises capacitor C 1, the end of C1 is connected to the junction of load and D1, the other end is connected with the negative terminal of the power supply of lighting a lamp.
T1 is elementary also can adopt alternate manner to be parallel to the input DC power two ends except adopting the positive flyback circuit that passes through as shown in Figure 2 to be parallel to the input DC power two ends, for example the half-bridge circuit, recommend circuit or full-bridge circuit.
T1 is elementary to be parallel to the input DC power two ends by the half-bridge circuit and to refer to, as shown in Figure 9, the first voltage changing module also comprises switch element Q11, Q12 and capacitor C 41, C42, the conductive channel end of Q11 be parallel to the input DC power two ends after the conductive channel end of Q12 is connected, also be parallel to the input DC power two ends after C41 and C42 series connection simultaneously, the first elementary tie point of T1 is connected in the junction of C41 and C42, and the second elementary tie point of T1 is connected in the junction of Q11 and Q12; The control end of Q11 is connected with PWM control module signal respectively with the control end of Q12.
T1 is elementary to be parallel to the input DC power two ends and to refer to by recommending circuit, as shown in figure 10, the first voltage changing module also comprises switch element Q11 and Q12, the conductive channel end that the first elementary tie point of T1 passes through Q11 is connected with the negative terminal of input DC power, the second elementary tie point of T1 is connected with the anode of input DC power, the conductive channel end that the 3rd elementary tie point of T1 passes through Q12 is connected with the negative terminal of input DC power, and the control end of Q11 is connected with PWM control module signal respectively with the control end of Q12.
T1 is elementary to be parallel to the input DC power two ends by the full-bridge circuit and to refer to, as shown in figure 11, the first voltage changing module also comprises switch element Q11, Q12, Q13 and Q14, the conductive channel end of Q11 be parallel to the input DC power two ends after the conductive channel end of Q12 is connected, simultaneously the conductive channel end of Q13 be parallel to the input DC power two ends after the conductive channel end of Q14 is connected, the first elementary tie point of T1 is connected in the junction of Q13 and Q14, the second elementary tie point of T1 is connected in the junction of Q11 and Q12, the control end of Q11, the control end of Q12, the control end of Q13, the control end of Q14 is connected with PWM control module signal respectively.
T1 level, except can adopting pass through the halfwave rectifier circuit and an end of load is connected as shown in Figure 2, also can be passed through the bridge rectifier circuit and be connected with an end of load, as shown in figure 12.
The structure of the second voltage changing module is identical with the structure of the first voltage changing module, and the second voltage changing module is connected with the other end of load, and the second voltage changing module is connected with PWM control module signal.
The principle of the present embodiment power supply circuits is: in the first voltage changing module, the control signal PWM1 of Q1 is high-frequency switching signal, Q1 and transformer T1 by VCC+/-input DC power forms first direct current supply voltage DC1 of load again by D1 and C1 rectifying and wave-filtering after being converted; In like manner, the second voltage changing module forms second direct current supply voltage DC2 of load; DC1, DC2 voltage form the supply voltage of lighting a lamp; As shown in Figure 3, Q2 conducting under the PWM2 control signal is controlled forms the second servo loop by the second voltage changing module power supply, and current path is DC2 end-HID lamp-ignition coil-Q2-C2/D2/T2; Q3 conducting under the PWM3 control signal is controlled forms the first loop by the first voltage changing module power supply, and current path is DC1 end-ignition coil-HID lamp-Q3-C1/D1/T1; The first loop and second servo loop have formed HID lamp square wave working current loop; The work schedule of the output signal of PWM control module is as follows: control signal PWM1 and PWM3, PWM4 and PWM2 work respectively simultaneously, between PWM1 and PWM3 or Dead Time (non-overlapping time) or the overlapping time that can add different lamps to control between PWM4 and PWM2; But answer alternation between control signal PWM1 and PWM3 and PWM4 and PWM2, avoid PWM1 and PWM2 to work simultaneously and cause voltage DC1 short circuit; Avoid PWM4 and PWM3 to work simultaneously and cause voltage DC2 short circuit.
The method of work of the present embodiment power supply circuits, when the HID lamp is worked, comprise the steps:
The first step, PWM control module output high-frequency switching signal, control that the second voltage changing module quits work, Q2 turn-offs, and controls the first voltage changing module work, Q3 conducting; Work half HID lamp time work period;
Second step, PWM control module output high-frequency switching signal, control that the first voltage changing module quits work, Q3 turn-offs, and work, the Q2 conducting of controlling the second voltage changing module; Work half HID lamp time work period; Then skip to the first step.
One of them outstanding advantages of the present utility model is: in full-bridge circuit, full-bridge circuit comprises tube portion and lower tube portion, the driving voltage of upper tube portion switch element be take the full-bridge mid point as benchmark, produce high ignition voltage because of the full-bridge mid point in the lamp start-up course, circuit can not absorb fully, and causes the pipe overvoltage to damage; Simultaneously due to the full-bridge mid-point voltage start and stabilization process in be all constantly to change, cause driving voltage with respect to mid point also in transformation, the switch element driving voltage is unstable also easily causes the switch element damage.With full-bridge circuit, compare, the utility model power supply circuits are cancelled two upper pipes of full-bridge circuit, thereby have avoided on the full-bridge circuit pipe because of the high and breakdown damage of ignition voltage; Power supply circuits only adopt manages Q2, Q3 under two of full-bridge circuit and realizes the HID lamp power circuit, and manage the low side of managing press/pipe stream when Q2, Q3 all are arranged on lamp work under two, adopt low voltage drive, Q2, Q3 are connected on same current potential, using and light a lamp the negative pole current potential of power supply as the benchmark of driving voltage, so circuit reliability is high.
The utility model also exists following advantage: power supply circuits are by the control of multiple signals, can realize the adjustment of modulating voltage size of current, cycle time (PWM duty ratio), power output, to meet dissimilar HID lamp and different starting characteristic mode/power requirement; The lamp current impedance loop is low; Can make fluorescent tube flicker free shake ground steady operation.
Embodiment bis-
The present embodiment power supply circuits as shown in Figure 5, with the distinctive points of embodiment mono-power supply circuits, be, the D1 of the first voltage changing module is connected between the negative terminal of the second tie point of T1 level and the power supply of lighting a lamp, the anode of D1 is connected with the negative terminal of the power supply of lighting a lamp, and the negative electrode of D1 is connected with the second tie point of T1 level; The structure of the second voltage changing module is identical with the structure of the first voltage changing module.Q2 is parallel to the two ends of D1, and Q3 is parallel to the two ends of D2.The other parts of the present embodiment power supply circuits are identical with embodiment mono-.
The principle of the present embodiment power supply circuits is: Q2 conducting under the PWM2 control signal is controlled forms the second servo loop by the second voltage changing module power supply, and current path is DC2 end-HID lamp-ignition coil-transformer T1 time level-Q2-D2/C2/T2; Q3 conducting under the PWM3 control signal is controlled forms the first loop by the first voltage changing module power supply, and current path is DC1 end-ignition coil-T2 level-Q3 of HID lamp-transformer-D1/C1/T1.
Embodiment tri-
As shown in Figure 6, the structure of the first voltage changing module and the second voltage changing module is not identical with embodiment's mono-for the present embodiment power supply circuits.The first voltage changing module of the present embodiment power supply circuits comprises inductance L 1, switch element Q1, diode D1 and capacitor C 1.The D utmost point of Q1 is connected with the anode of input DC power, and the S utmost point of Q1 is connected with load by L1, and the G utmost point of Q1 is connected with PWM control module signal.The negative electrode of D1 is connected in the junction of Q1 and L1, and the anode of D1 is connected with the negative terminal of input DC power, and the end of C1 is connected to the junction of load and L1, and the other end is connected with the negative terminal of input DC power.The structure of the second voltage changing module is identical with the structure of the first voltage changing module.The other parts of the present embodiment power supply circuits are identical with embodiment mono-.
The principle of the present embodiment power supply circuits is: in the first voltage changing module, the control signal PWM1 of Q1 is high-frequency switching signal, switch element Q1, inductance L 1, diode D1, filter capacitor C1 form reduction voltage circuit, input DC power voltage are converted to first direct current supply voltage DC1 of rear formation lamp; In like manner, the second voltage changing module forms second direct current supply voltage DC2 of load; Q2 conducting under the PWM2 control signal is controlled forms the second servo loop by the second voltage changing module power supply, and current path is DC2 end-HID lamp-ignition coil-Q2-C2; Q3 conducting under the PWM3 control signal is controlled forms the first loop by the first voltage changing module power supply, and current path is DC1 end-ignition coil-HID lamp-Q3-C1.
Embodiment tetra-
The present embodiment power supply circuits as shown in Figure 7, are with the difference of embodiment mono-power supply circuits, and the second tie point of T1 level of the first voltage changing module is not to be connected with the negative terminal of the power supply of lighting a lamp, but pass through capacitor C 5 second tie point elementary with T1, are connected.The structure of the second voltage changing module is identical with the structure of the first voltage changing module.The other parts of the present embodiment power supply circuits are identical with embodiment mono-.
Embodiment five
The present embodiment power supply circuits as shown in Figure 8, are with the difference of embodiment mono-power supply circuits, at the two ends of load, increase shunt capacitance C3.The other parts of the present embodiment power supply circuits are identical with embodiment mono-.The benefit that increases capacitor C 3 is to reduce the voltage ripple at lamp two ends.
Above-described embodiment is preferably execution mode of the utility model; but execution mode of the present utility model is not restricted to the described embodiments; other any do not deviate from change, the modification done under Spirit Essence of the present utility model and principle, substitutes, combination, simplify; all should be equivalent substitute mode, within being included in protection range of the present utility model.
Claims (7)
1. a HID lamp power circuit, is characterized in that, comprises the PWM control module, also comprises:
For controlling the Voltage-output time, make the direct voltage of input DC power convert the first voltage changing module and second voltage changing module of PWM type square-wave voltage to; Described the first voltage changing module and the second voltage changing module are parallel to respectively the input DC power two ends; By the first voltage changing module and the second voltage changing module, as the power supply of lighting a lamp, be load supplying in turn; By the first voltage changing module, being that load supplying forms the first loop, is that load supplying forms second servo loop by the second voltage changing module;
And be arranged on the first loop, for the switch element Q3 that controls the first loop break-make and be arranged on second servo loop, for controlling the switch element Q2 of second servo loop break-make; One end of the conductive channel end of Q2 and Q3 all is connected with the negative terminal of the power supply of lighting a lamp, and the other end is connected with the second voltage changing module with the first voltage changing module respectively;
Described PWM control module is connected with the first voltage changing module, the second voltage changing module, Q2 and Q3 signal respectively.
2. HID lamp power circuit according to claim 1, is characterized in that, described switch element Q2 and Q3 adopt N-type metal-oxide-semiconductor, P type metal-oxide-semiconductor, IGBT, N-type BJT or P type BJT;
Adopt the N-type metal-oxide-semiconductor to refer to, the S utmost point of N-type metal-oxide-semiconductor is connected with the negative terminal of the power supply of lighting a lamp, and the D utmost point is connected with the first voltage changing module or the second voltage changing module, and the G utmost point is connected with the PWM control module; Adopt P type metal-oxide-semiconductor to refer to, the D utmost point of P type metal-oxide-semiconductor is connected with the negative terminal of the power supply of lighting a lamp, and the S utmost point is connected with the first voltage changing module or the second voltage changing module, and the G utmost point is connected with the PWM control module; Adopt IGBT to refer to, the E utmost point of IGBT is connected with the negative terminal of the power supply of lighting a lamp, and the C utmost point is connected with the first voltage changing module or the second voltage changing module, and the G utmost point is connected with the PWM control module; Adopt N-type BJT to refer to, the E utmost point of N-type BJT is connected with the negative terminal of the power supply of lighting a lamp, and the C utmost point is connected with the first voltage changing module or the second voltage changing module, and the B utmost point is connected with the PWM control module; Adopt P type BJT to refer to, the C utmost point of P type BJT is connected with the negative terminal of the power supply of lighting a lamp, and the E utmost point is connected with the first voltage changing module or the second voltage changing module, and the B utmost point is connected with the PWM control module.
3. HID lamp power circuit according to claim 2, it is characterized in that, described the first voltage changing module comprises transformer T1, and T1 is elementary is parallel to the input DC power two ends by positive flyback circuit, half-bridge circuit, any circuit of recommending in circuit and full-bridge circuit; T1 time level is connected with load by halfwave rectifier circuit or bridge rectifier circuit; T1 time the level and load between also be provided with filter circuit; The other end of the conductive channel end of Q2 is connected and refers to the first voltage changing module, and the other end of the conductive channel end of Q2 is connected on the follow-up circuit of described halfwave rectifier circuit or bridge rectifier circuit.
4. HID lamp power circuit according to claim 3, it is characterized in that, described T1 is elementary to be parallel to the input DC power two ends by positive flyback circuit and to refer to, the first voltage changing module also comprises switch element Q1, the first elementary tie point of T1 is connected with the anode of input DC power, and the conductive channel end that the second elementary tie point of T1 passes through Q1 is connected with the negative terminal of input DC power; The Q1 control end is connected with PWM control module signal;
Described T1 is elementary to be parallel to the input DC power two ends by the half-bridge circuit and to refer to, the first voltage changing module also comprises switch element Q11, Q12 and capacitor C 41, C42, the conductive channel end of Q11 be parallel to the input DC power two ends after the conductive channel end of Q12 is connected, also be parallel to the input DC power two ends after C41 and C42 series connection simultaneously, the first elementary tie point of T1 is connected in the junction of C41 and C42, and the second elementary tie point of T1 is connected in the junction of Q11 and Q12; The control end of Q11 is connected with PWM control module signal respectively with the control end of Q12;
Described T1 is elementary to be parallel to the input DC power two ends and to refer to by recommending circuit, the first voltage changing module also comprises switch element Q11 and Q12, the conductive channel end that the first elementary tie point of T1 passes through Q11 is connected with the negative terminal of input DC power, the second elementary tie point of T1 is connected with the anode of input DC power, the conductive channel end that the 3rd elementary tie point of T1 passes through Q12 is connected with the negative terminal of input DC power, and the control end of Q11 is connected with PWM control module signal respectively with the control end of Q12;
Described T1 is elementary to be parallel to the input DC power two ends by the full-bridge circuit and to refer to, the first voltage changing module also comprises switch element Q11, Q12, Q13 and Q14, the conductive channel end of Q11 be parallel to the input DC power two ends after the conductive channel end of Q12 is connected, simultaneously the conductive channel end of Q13 be parallel to the input DC power two ends after the conductive channel end of Q14 is connected, the first elementary tie point of T1 is connected in the junction of Q13 and Q14, the second elementary tie point of T1 is connected in the junction of Q11 and Q12, the control end of Q11, the control end of Q12, the control end of Q13, the control end of Q14 is connected with PWM control module signal respectively.
5. HID lamp power circuit according to claim 2, is characterized in that, described the first voltage changing module comprises inductance L 1, switch element Q1, diode D1 and capacitor C 1; The anode of input DC power is connected with an end of the conductive channel end of Q1, and the other end of the conductive channel end of Q1 is connected with load by L1, and the control end of Q1 is connected with PWM control module signal; The negative electrode of D1 is connected in the junction of Q1 and L1, and the anode of D1 is connected with the negative terminal of input DC power, and the end of C1 is connected to the junction of load and L1, and the other end is connected with the negative terminal of input DC power.
6. according to the described HID lamp power circuit of claim 4 or 5, it is characterized in that, the structure of described the second voltage changing module is identical with the structure of the first voltage changing module.
7. HID lamp power circuit according to claim 6, is characterized in that, also comprises capacitor C 3, and the two ends of C3 and load two ends are connected in parallel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013204041995U CN203340390U (en) | 2013-07-08 | 2013-07-08 | Power supply circuit of HID lamp |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013204041995U CN203340390U (en) | 2013-07-08 | 2013-07-08 | Power supply circuit of HID lamp |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203340390U true CN203340390U (en) | 2013-12-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013204041995U Withdrawn - After Issue CN203340390U (en) | 2013-07-08 | 2013-07-08 | Power supply circuit of HID lamp |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203340390U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103347356A (en) * | 2013-07-08 | 2013-10-09 | 佛山肆强科技有限公司 | HID lamp power supplying method, circuit used by same and working method of circuit |
| CN106097732B (en) * | 2016-08-16 | 2018-05-29 | 安徽科力信息产业有限责任公司 | A kind of energy-saving control method for traffic signal control system |
-
2013
- 2013-07-08 CN CN2013204041995U patent/CN203340390U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103347356A (en) * | 2013-07-08 | 2013-10-09 | 佛山肆强科技有限公司 | HID lamp power supplying method, circuit used by same and working method of circuit |
| CN103347356B (en) * | 2013-07-08 | 2016-04-13 | 佛山肆强科技有限公司 | The method of work of HID lamp method of supplying power to and circuit used and this circuit |
| CN106097732B (en) * | 2016-08-16 | 2018-05-29 | 安徽科力信息产业有限责任公司 | A kind of energy-saving control method for traffic signal control system |
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Granted publication date: 20131211 Effective date of abandoning: 20160413 |
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| C25 | Abandonment of patent right or utility model to avoid double patenting |