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High-voltage discharge lamp operation device and illumination instrument

A high-pressure discharge lamp and lighting device technology, which is applied to lighting devices, high-efficiency power electronic conversion, output power conversion devices, etc. , avoid large-scale and cost increase, avoid the effect of large-scale and cost increase

Inactive Publication Date: 2013-08-21
PANASONIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, if the step-up breaker circuit is stopped, no induced voltage will be induced in the winding magnetically coupled to the inductor of the step-up breaker circuit, so there is a possibility that the supply of control power to the control unit will also be stopped.
On the other hand, if the capacitance of the capacitor for smoothing the induced voltage is increased, the control power can be supplied even when the boost circuit breaker circuit is stopped. The problem of large-scale and high cost

Method used

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  • High-voltage discharge lamp operation device and illumination instrument
  • High-voltage discharge lamp operation device and illumination instrument
  • High-voltage discharge lamp operation device and illumination instrument

Examples

Experimental program
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Effect test

Embodiment approach 1

[0025] Such as figure 1 As shown, the high-pressure discharge lamp lighting device of this embodiment includes: a boost circuit breaker circuit 1 for boosting the DC input voltage formed by full-wave rectification of the AC power supply AC by the rectifier circuit DB to a desired DC output voltage Vbus; The step-up circuit breaker control circuit 2 constituting the switching element Q1 of the step-up circuit breaker circuit 1; the power conversion circuit 3 for converting the DC output of the step-up circuit breaker circuit 1 into a desired AC output; controlling the power conversion circuit 3 to adjust the supplied The power conversion control circuit 4 for the power of the high pressure discharge lamp LA; provides operating power (control power supply) to the boost circuit breaker control part IC1 constituting the boost circuit breaker control circuit 2 and the power conversion control part IC2 constituting the power conversion control circuit 4 Vcc) control power supply cir...

Embodiment approach 2

[0045] The high-pressure discharge lamp lighting device of this embodiment is as follows: Figure 4 As shown, the configuration of the voltage detection circuit 2a is characteristic, and the other configurations are the same as those of the first embodiment. Therefore, the same reference numerals are assigned to the same constituent elements as those in Embodiment 1, and description thereof will be omitted.

[0046] The voltage detection circuit 2a of this embodiment is composed of a voltage dividing resistor R20 inserted between the voltage dividing resistor R11 and the ground, a switching element Q20 composed of a field effect transistor connected in parallel to the voltage dividing resistor R20, a capacitor C20, and a resistor R21. Embodiment 1 differs from the first embodiment in that a delay circuit for delaying the low-level control signal Vten input from the power conversion control unit IC2 to the gate of the switching element Q20 is added.

[0047] Next, the operatio...

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Abstract

In an event of switching a DC output voltage (Vbus) of a boost chopper circuit (1) from a first DC output voltage (VI) to a second DC output voltage (V2), a boost chopper control circuit (2) operates a boost chopper circuit (1) intermittently. Therefore, a stop period of the boost chopper circuit (1) is shortened as compared with a case where the boost chopper control circuit (2) does not operate the boost chopper circuit (1) intermittently. As a result, it becomes possible to supply a control power (Vcc) also when the DC output voltage (Vbus) of the boost chopper circuit (1) is switched at a starting time of a high pressure discharge lamp (LA) while avoiding size and cost increases of a power supply circuit (5) that supplies the control power (Vcc).

Description

technical field [0001] The present invention relates to a high-pressure discharge lamp lighting device for lighting a high-pressure discharge lamp and a lighting fixture having the high-pressure discharge lamp lighting device. Background technique [0002] Conventionally, a device described in Patent Document 1 has been proposed as a high-pressure discharge lamp lighting device for lighting a high-pressure discharge lamp such as a high-intensity discharge lamp (HID lamp). In the conventional example described in Patent Document 1, instead of applying a high-voltage pulse from the ignition device (starting circuit) to the high-pressure discharge lamp at the time of starting, the output voltage of the step-up chopper circuit (chopper) circuit at the time of starting is made higher than that at the time of stable lighting. The output voltage is still high, so that the high-pressure discharge lamp is started. [0003] In the above conventional example, the power supply (control...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H05B41/24
CPCY02B70/16H02M2001/0006H02M1/36H05B41/2886H02M7/5387H02M2001/0035H02M3/156Y02B70/10H02M1/0035H02M1/0006
Inventor 小松直树熊谷润
Owner PANASONIC CORP