JP2001155531A - Elevating lighting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an elevating lighting device capable of simplifying the installation and control by integrally mounting a high-pressure discharge lamp lighting device and a power source of a motor to integrally control the high- pressure discharge lamp and the motor. SOLUTION: The output voltage of an inversion circuit of a high-pressure discharge lamp lighting circuit having a step-down chopper circuit, the inversion circuit and a control circuit for controlling these circuits, is utilized as a power source of a motor for moving the elevating lighting device, and the operation of the motor is also controlled by the control circuit.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an elevation lighting device using a high-pressure discharge lamp and an electronic lighting device.

[0002]

2. Description of the Related Art In buildings with high ceilings, such as gymnasiums, in order to facilitate maintenance such as replacement of lamps and cleaning of appliances, a lighting system is provided with an electric motor for raising and lowering lamps. I have.

[0003] Japanese Patent Application Laid-Open No. 7-122110 discloses a lifting / lowering illuminating apparatus in which a discharge lamp lighting device is separated into a ballast and a lamp starter, and the lamp starter is installed on the lamp side and the ballast is fixed on the fixed side. I have. In the embodiment shown in this publication, a power supply supplied to the ballast and a power supply for driving the motor are separately provided.

[0004]

However, the separate installation of the power supply for the electric motor and the power supply for the ballast for lighting the lamp has made the installation of the lighting apparatus complicated. In addition, the motor driving means must be provided separately, which not only increases the size of the device, but also relies on different control devices for lamp lighting control and motor control, thus complicating the operation.

Therefore, according to the present invention, the power supply of the motor is supplied from the inside of the lighting device of the high pressure discharge lamp to simplify the installation of the lighting device, and the control operation is performed by integrating the control of the lighting device and the motor. Is to make it easier.

[0006]

According to the first aspect of the present invention, there is provided an elevation lighting device comprising: a DC power supply; a chopper circuit supplied with an output voltage of the DC power supply and outputting a DC voltage; A polarity reversing circuit having a supplied high-pressure discharge lamp as a load; a control circuit for controlling the output voltage of the chopper circuit and controlling the polarity of the polarity reversing circuit;
A motor to which the output voltage of the polarity reversing circuit is supplied; and a lamp for performing a lifting operation by the motor and accommodating a high-pressure discharge lamp.

In the present invention and the following present invention, the definitions and technical meanings of terms are as follows unless otherwise specified.

The DC power supply may be any of a rectified DC power supply in which AC is rectified and a battery power supply.

The chopper circuit is composed of a step-up chopper circuit and a step-down chopper circuit, and permits the use of, for example, a current limiting inductance as ballast means for compensating the load characteristics of the discharge lamp. The boost chopper circuit consists of an inductance element, a rectifier,
It includes a capacitor element, a switching element, and the like, and has a function of boosting an input voltage to a predetermined voltage value by switching control and outputting the voltage.

The step-down chopper circuit includes a switching element such as a field-effect transistor (FET), a diode, an inductance element, and the like. The DC voltage boosted by the step-up chopper circuit is switched to an arbitrary DC voltage by switching the switching element. It has a function of outputting a voltage.

The polarity reversing circuit allows a full bridge circuit and a half bridge circuit to be formed, and a switching element forming these circuits may be a field effect transistor (FET). By the operation of these switching elements, the polarity inversion circuit can output a DC voltage having an arbitrary polarity and an AC voltage having an arbitrary frequency.

The control circuit has a function of detecting the output voltage of the chopper circuit and feeding back the detected voltage to control the switching elements of the step-down chopper circuit, a function of controlling each switching element constituting the polarity inversion circuit, and the like. Contains. Further, the control means allows the configuration including a microcomputer. By using a microcomputer, the circuit can be simplified and downsized. Alternatively, the microcomputer may be used to monitor the power supply voltage, stop the step-down chopper circuit when detecting an abnormality in the circuit, or the like, to protect the lighting device. The power supply of this microcomputer is
The output terminal of the DC power supply or the output terminal of the step-up chopper circuit may be divided or transformed through a transformer, or may be supplied from another power source provided separately.

The control circuit is connected to a control panel or the like, and performs various controls in response to commands such as turning on and off a high-pressure discharge lamp or raising and lowering a lamp.
Further, a remote control receiver can be provided in this control circuit to perform control from the remote control. By using the remote control, the installation of the elevating lighting device is further simplified.

A high-pressure discharge lamp is connected to the polarity inversion circuit as a load. The high-pressure discharge lamp allows a mercury lamp, a metal halide lamp, a high-pressure sodium lamp, a ceramic metal halide lamp, and the like. Further, a pulse generating circuit may be connected in parallel or in series with the high-pressure discharge lamp to facilitate starting of the high-pressure discharge lamp.

A motor is connected to the output of the polarity reversing circuit in parallel with a high-pressure discharge lamp or the like. The motor may be a DC motor or an AC motor. Preferably, the motor is connected to the output terminal of the polarity reversing circuit via a contact or the like. Further, the operation control means of the electric motor may be connected. Also, an overcurrent detection element can be attached to the motor. With this overcurrent detection element, it is possible to detect an excessive current flowing through the motor due to an abnormality when the lamp is raised or lowered, and when the overcurrent is detected, the output of the polarity reversing circuit or the step-down chopper circuit is stopped, thereby making the circuit And the motor can be protected.

The lamp is configured to accommodate a high-pressure discharge lamp, and includes a reflector, a socket, a contact for supplying voltage, and the like. Further, a portion fixed to the ceiling surface of the liftable lighting device is provided with a motor, a drum, a wire, and the like, and has a function of rotating the drum by the motor to raise and lower the lamp by winding up and down the wire.

According to a second aspect of the present invention, there is provided the elevating lighting apparatus according to the first aspect, wherein the control circuit is configured to be able to control the rotation speed and the reversal of the electric motor.

According to a third aspect of the present invention, there is provided the liftable lighting device according to the first aspect, wherein the control circuit is configured to be able to control the high-pressure discharge lamp together with the control of the electric motor.

According to the first aspect of the present invention, since the voltage supplied to the motor is supplied from the output of the polarity inverting circuit, the power supply to the motor can be integrally formed without providing a separate power supply. Installation of the lighting device is facilitated.

In the invention of claim 2, in addition to the effect of claim 1, the control circuit controls the output voltage of the step-down chopper circuit and the polarity of the polarity inversion circuit, thereby controlling the voltage applied to the motor and the DC voltage. Selection of voltage or AC voltage, selection of positive voltage or negative voltage for DC voltage, and selection of AC frequency for AC voltage can control the rotation direction and number of rotations of the motor. it can. For this reason, since it is not necessary to provide a control means for the electric motor, it is possible to reduce the size and the cost of the elevating lighting device, and to improve the control operability.

According to the third aspect of the present invention, in addition to the effect of the first aspect, the control circuit controls the output voltage of the step-down chopper circuit and the polarity of the polarity inverting circuit, thereby controlling the voltage applied to the electric motor and the DC voltage. Selection of voltage or AC voltage, selection of positive voltage or negative voltage for DC voltage, and selection of AC frequency for AC voltage can control the rotation direction and number of rotations of the motor. it can. For this reason, since it is not necessary to provide a control means for the electric motor, it is possible to reduce the size and cost of the elevating lighting device, and also to simplify the control operation.
In addition, since the same control circuit is used to control the high-pressure discharge lamp, it is also possible to perform integrated control such as turning off the high-pressure discharge lamp during the up / down operation of the lamp that operates the motor. Not only becomes easier,
Safety is also improved.

[0022]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of a lifting type illumination device according to the present invention will be described with reference to FIG.

FIG. 1 is a circuit diagram of a first embodiment of a lifting type illumination device according to the present invention, and FIG. 2 is a sectional view of the lifting type illumination device.

In the circuit diagram of FIG. 1, a rectifier circuit 2, a step-up chopper circuit 3, a step-down chopper circuit 4, and a load circuit 5 are sequentially connected to the secondary side of an AC power supply 1.

The AC power supply 1 is a commercial 200 V AC power supply.

Although not shown, the rectifier circuit 2 includes a noise prevention circuit, a bridge type full-wave rectifier circuit, a smoothing circuit, etc., and rectifies a commercial AC power supply and outputs a DC power supply.

Although not shown, the boost chopper circuit 3 includes an inductance, a diode, a capacitor, a switching element, and the like, and boosts the DC voltage rectified by the rectifier circuit 2 at a predetermined boost ratio.

The step-down chopper circuit 4 comprises a field effect transistor (FET) Q0 and an inductance L1 connected in series, a diode D1 connected between the FET Q0 and the inductance L1, and the other end of the output of the step-up chopper circuit 4. Thus, the DC voltage boosted by the boost chopper circuit 3 is reduced to a desired voltage. In addition, in order to prevent flicker during lighting of the high pressure discharge lamp DL, FE
It has a function of superimposing a high frequency on a DC voltage by switching of TQ0.

Further, voltage dividing resistors R1 and R2 for voltage detection are connected in series to the other end of the inductance L1 and the negative terminal of the diode D1, which are output terminals of the step-down chopper circuit 4. Further, the inductance L1 of the step-down chopper circuit 4 also functions as a current-limiting inductance for stably lighting the high-pressure discharge lamp DL.

At the output terminal of the step-down chopper circuit 4, four field effect transistors (FETs) Q1, Q2, Q3,
A full bridge circuit 51 composed of Q4 is configured.
The output terminal of the full bridge circuit 51 is connected by a series circuit of a starting circuit 52 for generating a high-voltage pulse and a high-pressure discharge lamp DL. Although not shown, the starting circuit 52 is configured by connecting an inductance, a capacitor, and a bidirectional thyristor, which also serve as a pulse transformer, in series, and includes a series circuit of a resistor and a diode in parallel with the bidirectional thyristor.

The output terminal of the full bridge circuit 51 is connected in parallel with the high-pressure discharge lamp DL and the starting circuit 52,
The electric motor 7 is connected via the contact SW1. In the present embodiment, a DC motor is used as the motor 7.

Although not shown, the control circuit 6 includes a microcomputer, and the power of the microcomputer is supplied from the output of the step-up chopper circuit 3 via the transformer T.

The control circuit 6 controls the FET Q0 of the step-down chopper circuit 4 and the field effect transistors (FETs) Q1, Q2, Q3, Q4 of the full bridge circuit 51.
By outputting a signal to each gate of each FE, each FE
The output voltage is controlled by controlling the switching of the TQ1, Q2, Q3, and Q4 to control the operation of the full bridge circuit 51 and the FET Q0 of the step-down chopper circuit 4. The output of the step-down chopper circuit 4 is controlled by dividing the output voltage of the step-down chopper circuit 4 by the voltage dividing resistor R2.
And input to the control circuit 6, and then perform switching control of the FET Q0 of the step-down chopper circuit 4 to output a desired voltage. Further, by detecting the output of the step-down chopper circuit 4, it is also possible to detect whether or not the high-pressure discharge lamp DL is lit and whether the power supply voltage 1, the step-up chopper circuit 3 and the step-down chopper circuit 4 are abnormal or normal. The control circuit 6 also controls the contact SW1 connected to the electric motor 7.

A control panel (not shown) is connected to the control circuit 6. The control panel transmits to the control circuit 6 the lighting, turning off and dimming of the high-pressure discharge lamp DL of the elevating lighting device, and the control signal of the electric motor 7.

The sectional view of FIG. 2 will be described. The same parts as those in FIG. 1 are denoted by the same reference numerals.

The main body 10 of the elevating type lighting apparatus has a ceiling surface 11.
Attached to. In the main body 10, a lamp 12 which can be moved up and down by the electric motor 7, a rectifier circuit, a chopper circuit, a circuit section 13 in which a polarity reversing circuit and the like are housed, the electric motor 7, a drum 14 rotated by the electric motor 7, etc. are housed in the ceiling. Is stored in the fixed part 15. The lamp 12 includes a reflector 16, a socket 17 fixed to the reflector 16, a high-pressure discharge lamp DL detachable by the socket 17, a contact 18 a for supplying power to the high-pressure discharge lamp DL, and the like. The fixed portion 15 includes the electric motor 7, the electric motor 7
The drum 14 is rotated by the
A wire 19 attached to the lamp moves the lamp 12 up and down.
Also, a contact 1 for supplying power to the high-pressure discharge lamp of the lamp.
8 b is attached and connected to the contact 18 a of the lamp 12.

The operation of this embodiment will be described.

The control of the high-pressure discharge lamp DL will be described.

During the operation of the high pressure discharge lamp DL, the motor 7
Is turned off, and the electric motor 7 is turned off.
It is separated from the polarity inversion circuit 51. After the power supply 1 is turned on, the control circuit 6 starts its operation and resets the RAM area of the built-in microcomputer. Thereafter, the output of the step-down chopper circuit 6 is checked, and if there is no abnormality such as a power supply voltage, it is determined that the voltage is normal, and the FET Q0 of the step-down chopper circuit 4 is controlled to supply a desired voltage to the load circuit 5. Thereafter, the switching element Q1 of the load circuit 5
, Q4 is output from the starting circuit 52 to the high-pressure discharge lamp DL. Thereafter, the high-pressure discharge lamp DL is turned on and the output of the step-down chopper circuit 4 is confirmed.
The FET Q0 of the step-down chopper circuit 4 controls the output of the step-down chopper circuit 4 so that a desired voltage is supplied to the high-pressure discharge lamp DL. Meanwhile, Q1 of the polarity inversion circuit 51
, Q4 becomes a complete output, and the high-pressure discharge lamp DL can perform stable lighting.

Further, other control of the high-pressure discharge lamp DL can also be performed by the control circuit 6. When turning off the high-pressure discharge lamp DL, the F
This is performed by turning off ETQ0 and stopping the supply of power to the high-pressure discharge lamp DL. When performing the dimming operation of the high-pressure discharge lamp DL, the FET Q0 of the step-down chopper circuit 4
By changing the power supply of the high-pressure discharge lamp DL.

Next, the elevating operation of the elevating lighting device will be described.

When a command signal for lowering the lamp 12 is given from the control panel to the control circuit 6, when the control circuit 6 lowers the output voltage of the step-down chopper circuit 4, the high-pressure discharge lamp DL is turned off. Thereafter, the control circuit 6 turns on the contact SW connected to the motor 7, turns on Q 1 and Q 3 and turns off Q 2 and Q 4 among the FETs of the polarity inversion circuit 51, so that the DC is supplied to the motor 7. A positive voltage is applied. At the same time, the control circuit 6 controls the FE of the step-down chopper circuit 4 so that the voltage necessary for the motor 7 to operate sufficiently is output.
TQ0 is controlled. The electric motor 7 to which the positive voltage is applied rotates the drum 14, and unwinds the wire 19 to lower the lamp 12.

When a command to change the descent speed of the lamp 12 is given to the control circuit 6 from the control panel,
The control circuit 6 can change the rotation speed of the electric motor 7 by changing the output voltage of the step-down chopper circuit 4, and can also change the descent speed of the lamp 12. Further, the stop operation can be performed by turning off the FET Q0 of the step-down chopper circuit 4 and stopping the output voltage of the step-down chopper circuit 4.

Next, a case where the lamp 12 is raised after maintenance of the lamp 12 has been completed will be described.

When a command to raise the lamp 12 is given from the control panel, the control circuit 6 controls the FET Q
1. By turning off Q3 and turning on Q2 and Q4, a DC negative voltage is applied to the motor 7. At the same time, the control circuit 6 controls the FET Q0 of the step-down chopper circuit 4 so that a voltage necessary for the electric motor 7 to operate sufficiently is output. The electric motor 7 to which the negative voltage is applied rotates the drum 14 in a direction opposite to the direction in which the drum 14 descends, and the lamp 12 is raised by winding up the wire 19. The electric motor 7 rotates in the reverse direction of the descent and the lamp 12 rises. At this time, it is also possible to change the speed at which the lamp 12 rises.
Can be performed by the same operation as when descending

Next, a description will be given of a second embodiment of the lifting type illumination device according to the present invention with reference to FIG. FIG. 3 shows a second embodiment of the present invention.
FIG. 3 is a circuit diagram illustrating a configuration of a lifting-type lighting device according to the embodiment. In addition,
1 are given the same reference numerals.

In this embodiment, an example in which an AC motor is used as the motor 72 will be described. Full bridge circuit 51
Are connected to a high-pressure discharge lamp DL and a starting circuit 52.
The electric motor 72 is connected in parallel via the contact SW2. The contact SW2 has a rising contact, a falling contact, and a stop contact, and the control of each contact is performed by the control circuit 6.

The control circuit 6 has a receiver for the control remote controller 8, and is configured to be able to receive signals from the control remote controller 8. The control remote controller 8 transmits to the control circuit the lighting, extinguishing, dimming, and control of the electric motor 72 of the high-pressure discharge lamp DL of the elevation lighting device.

The control circuit 6 controls the FET Q0 for controlling the output of the step-down chopper circuit 4 and the FETs Q1, Q2, Q3 and Q4 for controlling the polarity of the polarity inverting circuit 51.
The contact of the electric motor 72 can be controlled by receiving a signal from the control remote controller 8.

The elevating operation of the elevating lighting apparatus of this embodiment will be described.

When a command signal to lower the lamp 12 is given from the control remote controller 8 to the control circuit 6, the control circuit 6 lowers the output voltage of the step-down chopper circuit 4 and
L is turned off. Thereafter, the control circuit 6 connects the contact SW2 connected to the electric motor 72 to the descending contact. An AC voltage is applied to the electric motor 72 by alternately turning on and off Q1, Q3 and Q2, Q4 among the FETs of the polarity inversion circuit 51. At the same time, the control circuit 6
The FET Q0 of the step-down chopper circuit 4 is controlled so that a voltage necessary for sufficient operation of the step-down circuit is output.

When a command for changing the descent speed of the lamp 12 is given from the control remote controller 8 to the control circuit 6, the control circuit 6 switches the FETs Q1, Q3 and Q2, Q4 of the step-down chopper circuit 4. By changing the switching speed, the frequency of the AC output of the polarity reversing circuit 51 is changed, thereby changing the rotation speed of the electric motor 72 and changing the descent speed of the lamp 12.
Further, at the time of the stop operation, the electric motor 72 can be stopped by switching the contact SW2 of the electric motor 72 to the stop contact.

Next, a case where the lamp 12 is raised after the maintenance of the lamp 12 is completed will be described.

When a command to raise the lamp 12 is given from the control remote controller 8, the control circuit 6 sets the contact SW of the electric motor 72.
2 is switched to a rising contact, and the FETs Q1, Q3 and Q2, Q2 of the polarity inversion circuit 51 are alternately turned on and off, whereby an AC voltage is applied to the motor 72. At the same time, the control circuit 6 controls the FE of the step-down chopper circuit 4 so that the voltage necessary for the motor 72 to operate sufficiently is output.
TQ0 is controlled.

When the high-pressure discharge lamp DL is to be turned on, control is performed such that the contact SW2 of the motor 72 is set to a stop contact to prevent the voltage from being applied to the motor 72.

[0056]

According to the first aspect of the present invention, since the power supply for the drive power supply of the motor for raising and lowering operation can be supplied from inside the lighting lighting circuit of the lifting and lowering type lighting device, the installation of the lighting device is complicated. It is possible to provide a vertically illuminating device in which the size of the device can be reduced without any problem.

According to the second aspect of the present invention, in addition to the effect of the first aspect, since the control of the motor can be performed by the control circuit, it is not necessary to provide control means dedicated to the motor. Therefore, it is possible to provide a vertically illuminating device in which the size of the device can be further reduced and the operation of the vertically moving operation is simplified.

According to the third aspect of the invention, in addition to the effects of the first and second aspects, the control operation is simplified by integrating the control of the high-pressure discharge lamp and the control of the electric motor.
When the lamp is lowered, control such as turning off the high-pressure discharge lamp is simplified, and a lift-type lighting device with improved safety can be provided.

[Brief description of the drawings]

FIG. 1 is a circuit diagram of a first embodiment of a lifting-type lighting device according to the present invention.

FIG. 2 is a cross-sectional view of the liftable lighting device according to the first embodiment of the liftable lighting device of the present invention.

FIG. 3 is a circuit diagram of a second embodiment of the liftable lighting device according to the present invention;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 4 ... Step-down chopper circuit 5 ... Load circuit 51 ... Polarity reversal circuit DL ... High pressure discharge lamp 6 ... Control circuit 7 ... Electric motor 12 ... Lighting device 13 ... Circuit part 14 ... Drum

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Kazuho Tanaka 4-3-1 Higashishinagawa, Shinagawa-ku, Tokyo Inside Toshiba Lighting & Technology Corporation (72) Inventor Sadao Kondo 4-3-1 Higashishinagawa, Shinagawa-ku, Tokyo (72) Inventor Keizo Suzuki 4-3-1 Higashi-Shinagawa, Shinagawa-ku, Tokyo In-house (72) Inventor Toshifumi Masuda 4-3-1 Higashi-Shinagawa, Shinagawa-ku, Tokyo No. Toshiba Litec Co., Ltd.

Claims (3)

[Claims] A DC power supply; a chopper circuit to which an output voltage of the DC power supply is supplied to output a DC voltage; a polarity inversion circuit to which an output voltage of the chopper circuit is supplied and a high-pressure discharge lamp is used as a load; A control circuit for controlling the output voltage of the inverter and controlling the polarity of the polarity inversion circuit;
A lifting / lowering lighting device comprising: a motor to which an output voltage of a polarity reversing circuit is supplied; and a lamp for performing a lifting / lowering operation by the motor and accommodating a high-pressure discharge lamp. 2. The control circuit according to claim 1, wherein said control circuit is configured to be capable of controlling the rotation speed and reversal of said motor.
Lighting system. 3. The up-and-down lighting device according to claim 1, wherein the control circuit is configured to control the high-pressure discharge lamp together with the control of the electric motor.