JP2012099578A - Power supply device, illumination device, and capacitor module - Google Patents

Abstract

PROBLEM TO BE SOLVED: To allow an electrolytic capacitor to be exchanged easily, prevent electric shock, and obtain safety in the exchange.SOLUTION: A capacitor module 100 includes: an electrolytic capacitor 110; a positive electrode terminal 141; a negative electrode terminal 142; and a discharge circuit 130. The positive electrode terminal 141 is electrically connected to a positive electrode of the electrolytic capacitor 110. The negative electrode terminal 142 is electrically connected to a negative electrode of the electrolytic capacitor 110. A capacitor fixing part fixes the capacitor module 100 detachably.

Description

  The present invention relates to a power supply device having an electrolytic capacitor.

In a lighting fixture having a light source such as an LED, the lifetime of the light source is, for example, about 40,000 hours. Since this is almost the same as the life of the power supply device, there is a lighting fixture in which the power supply device and the light source circuit are integrated.
The light source of the luminaire is defined as the lifetime when the total luminous flux is reduced to 70% of the initial value. Therefore, if the light source can be somewhat dark, the luminaire can continue to be used even after the lifetime of the light source has elapsed. . On the other hand, since the light source cannot be turned on when the power supply device reaches the end of its life, it is impossible to continue using the lighting fixture.

No. 6-5592 JP 2000-354384 A

The life factor of the power supply device includes an electrolytic capacitor included in the power supply device. Therefore, the life of the power supply device can be extended by making the electrolytic capacitor replaceable.
However, during operation of the power supply device, the electrolytic capacitor may be charged with a high voltage. Therefore, there is a risk of electric shock if the electrolytic capacitor can be easily replaced.
The present invention has been made, for example, in order to solve the above-described problems, and allows the electrolytic capacitor of the power supply device to be easily replaced, prevents electric shock, and ensures safety during replacement. Objective.

A power supply apparatus according to the present invention includes an electrolytic capacitor, a positive electrode terminal electrically connected to a positive electrode of the electrolytic capacitor, a negative electrode terminal electrically connected to a negative electrode of the electrolytic capacitor, and a discharge circuit for discharging the electrolytic capacitor. Module,
A positive electrode connection terminal that contacts and electrically connects with the positive electrode terminal; a negative electrode connection terminal that contacts and electrically connects with the negative electrode terminal; and a capacitor fixing portion that removably fixes the capacitor module. Features.

  According to the power supply device of the present invention, the capacitor fixing part fixes the capacitor module in a detachable manner, so that the electrolytic capacitor can be easily replaced. Moreover, since the discharge circuit discharges the electrolytic capacitor, electric shock can be prevented.

FIG. 3 is a perspective view illustrating an appearance of a lighting fixture 800 according to Embodiment 1. FIG. 3 is a block configuration diagram illustrating an example of a functional block configuration of a lighting fixture 800 according to Embodiment 1. FIG. 3 is a perspective view illustrating part of a power supply device 830 in Embodiment 1. FIG. 2 is a front view and a cross-sectional view showing a structure of capacitor module 100 according to the first embodiment. FIG. 3 is a circuit diagram showing a circuit configuration of capacitor module 100 according to the first embodiment. FIG. 3 is a side sectional view showing a structure of capacitor fixing portion 200 in the first embodiment. FIG. 3 is a bottom cross-sectional view showing the structure of capacitor fixing portion 200 in the first embodiment. FIG. 6 is a front view and a cross-sectional view illustrating a structure of a capacitor module 100 according to a second embodiment. FIG. 6 is a circuit diagram showing a circuit configuration of capacitor module 100 according to the second embodiment.

Embodiment 1 FIG.
The first embodiment will be described with reference to FIGS.

FIG. 1 is a perspective view showing an external appearance of a lighting fixture 800 in this embodiment.
The lighting fixture 800 includes, for example, a main body 810, a light source 820, a capacitor module 100, and the like. The capacitor module 100 is detachable from the lighting fixture 800 and incorporates an electrolytic capacitor. The capacitor module 100 is exposed outside the main body 810 so that it can be easily replaced. When the lighting fixture 800 is of a type that is used by being attached to the ceiling surface, the capacitor module 100 protrudes from the bottom surface of the main body 810, for example.

FIG. 2 is a block configuration diagram showing an example of a functional block configuration of the lighting fixture 800 in this embodiment.
The lighting fixture 800 includes a power supply device 830 and a light source circuit 840. The power supply device 830 receives power from, for example, an AC power source AC such as a commercial power source or a DC power source such as a battery, converts the supplied power, and generates power to be supplied to the light source circuit 840.
The light source circuit 840 includes a light source 820. The light source 820 emits light by the power supplied from the power supply device 830. The light source circuit 840 supplies the power supplied from the power supply device 830 to the light source 820. The light source 820 is, for example, a light emitting diode (LED). The light source circuit 840 is a circuit in which a plurality of light sources 820 are electrically connected in series, for example.

The power supply device 830 has an electrolytic capacitor. The electrolytic capacitor built in the capacitor module 100 functions as an electrolytic capacitor of the power supply device 830. By replacing the capacitor module 100, the electrolytic capacitor can be easily replaced. The life of the power supply device 830 can be extended by replacing the electrolytic capacitor that has reached the end of its life.
The power supply device 830 has a protection function that detects whether or not the capacitor module 100 is attached and stops operation when the capacitor module 100 is not attached.

FIG. 3 is a perspective view showing a part of the power supply device 830 in this embodiment.
The power supply device 830 includes a substrate 831. The substrate 831 may be the same as the substrate on which other components of the power supply device 830 are mounted, or may be a substrate different from the substrate on which the other components are mounted. Alternatively, the substrate 831 may be the same substrate as the substrate on which the light source 820 of the light source circuit 840 and other components are mounted.
Capacitor fixing portion 200 is mounted on substrate 831. The capacitor fixing part 200 is, for example, a female socket. The capacitor fixing unit 200 fixes the capacitor module 100 by screwing with the capacitor module 100. The capacitor fixing unit 200 has two or more terminals. The terminals of the capacitor fixing part 200 are electrically connected by contacting the terminals of the capacitor module 100. Thereby, the electrolytic capacitor built in the capacitor module 100 functions as a part of the power supply device 830.

FIG. 4 is a front view and a sectional view showing the structure of the capacitor module 100 in this embodiment.
The front view is a side view and a bottom view. The cross-sectional view is a side view cross-sectional view.
The capacitor module 100 has an external shape similar to a safety ball. The capacitor module 100 includes an electrolytic capacitor 110, a substrate 120 (base material), a discharge circuit 130, a positive terminal 141 (socket contact terminal), a negative terminal 142 (socket contact terminal), wirings 151 and 152, an insulating portion 161 (separator), A cover 170 and the like are included.
The electrolytic capacitor 110 is, for example, an aluminum electrolytic capacitor. The electrolytic capacitor 110 has a positive electrode and a negative electrode. The positive electrode of the electrolytic capacitor 110 is electrically connected to the positive electrode terminal 141 via the wiring 151. The negative electrode of the electrolytic capacitor 110 is electrically connected to the negative electrode terminal 142 via the wiring 152. The electrolytic capacitor 110 is mounted on the substrate 120. Note that an insulating portion may be provided between the substrate 120 and the negative electrode terminal 142 to ensure insulation.
The negative terminal 142 has a hollow male screw shape. The positive terminal 141 is located at the tip of the shaft of the negative terminal 142. The positive terminal 141 and the negative terminal 142 are made of a conductive material such as metal, for example. The insulating part 161 is located between the positive terminal 141 and the negative terminal 142. The insulating part 161 is made of an insulating material. The insulating part 161 insulates between the positive electrode terminal 141 and the negative electrode terminal 142.
The discharge circuit 130 discharges the electrolytic capacitor 110. Thereby, even when the user removes the capacitor module 100 while the electrolytic capacitor 110 is charged, the user can be prevented from receiving an electric shock. The discharge circuit 130 is constituted by, for example, a surface mount component. The surface-mounted components constituting the discharge circuit 130 are mounted on the surface of the substrate 120 opposite to the electrolytic capacitor 110.
The cover 170 is made of an insulating material. The cover 170 covers the electrolytic capacitor 110, prevents the user from touching the electrolytic capacitor 110 directly, and prevents the user from receiving an electric shock.
When the temperature of the electrolytic capacitor 110 rises abnormally, such as at the end of its life, the inside generates heat and generates gas. The electrolytic capacitor 110 has an explosion-proof valve in order to prevent damage due to an increase in internal pressure due to gas generation. When the internal pressure rises due to gas generation, the explosion-proof valve opens, the gas is released, and the internal pressure drops. For this reason, the cover 170 has a space in which at least the explosion-proof valve can operate normally.
The cover 170 has a gas vent 171. The number of the vent holes 171 may be one or plural. The gas vent 171 is a through hole through which the gas released from the inside of the electrolytic capacitor 110 due to the operation of the explosion-proof valve is taken out of the cover 170. In addition, when the cover 170 has a strength sufficient to withstand the increase in internal pressure due to the operation of the explosion-proof valve, the gas vent 171 may not be provided. Moreover, you may comprise so that the raise of the internal pressure by operation | movement of an explosion-proof valve can be absorbed by taking the volume inside cover 170 large enough.

Ｒは、放電抵抗Ｒ３１の抵抗値を表わす。Ｃは、電解コンデンサ１１０の静電容量を表わす。ｖ_０は、電源装置８３０の動作時における電解コンデンサ１１０の両端電圧を表わす。ｔは、コンデンサモジュール１００を電源装置８３０から取り外してからの経過時間（例えば１秒）を表わす。ｖは、コンデンサモジュール１００を電源装置８３０から取り外してからｔ秒後における電解コンデンサ１１０の両端電圧（例えば４５Ｖ）を表わす。
例えば、電解コンデンサ１１０の静電容量が３３００μＦ、動作時における電解コンデンサ１１０の両端電圧が５０Ｖであるとすると、放電抵抗Ｒ３１の抵抗値Ｒは、例えば約２．８ｋΩに設定する。この場合、動作時において放電抵抗Ｒ３１を流れる電流は、約１８ｍＡであり、動作時において放電抵抗Ｒ３１における電力損失は、約０．９Ｗである。 FIG. 5 is a circuit diagram showing a circuit configuration of the capacitor module 100 in this embodiment.
The discharge circuit 130 is electrically connected between the positive terminal 141 and the negative terminal 142. The discharge circuit 130 has a discharge resistor R31, for example. The discharge resistor R31 is electrically connected to the electrolytic capacitor 110 in parallel.
During operation of the power supply device 830, power loss due to the current flowing through the discharge resistor R31 occurs. For this reason, it is better that the resistance value of the discharge resistor R31 is large. However, in order to prevent an electric shock, the resistance value of the discharge resistor R31 is set so that the voltage across the electrolytic capacitor 110 is, for example, 45 V or less, for example, within one second after the capacitor module 100 is removed from the power supply device 830.

R represents the resistance value of the discharge resistor R31. C represents the capacitance of the electrolytic capacitor 110. v ₀ represents the voltage across the electrolytic capacitor 110 during operation of the power supply device 830. t represents an elapsed time (for example, 1 second) after the capacitor module 100 is removed from the power supply device 830. v represents a voltage across the electrolytic capacitor 110 (for example, 45 V) t seconds after the capacitor module 100 is removed from the power supply device 830.
For example, assuming that the capacitance of the electrolytic capacitor 110 is 3300 μF and the voltage across the electrolytic capacitor 110 during operation is 50 V, the resistance value R of the discharge resistor R31 is set to about 2.8 kΩ, for example. In this case, the current flowing through the discharge resistor R31 during operation is approximately 18 mA, and the power loss in the discharge resistor R31 during operation is approximately 0.9 W.

FIG. 6 is a side sectional view showing the structure of the capacitor fixing portion 200 in this embodiment.
The capacitor fixing part 200 has an external shape similar to a safety ball socket. Capacitor fixing portion 200 is mounted on substrate 831. The capacitor fixing part 200 includes a case 211, a pedestal part 212, a positive electrode connecting terminal 221, a board fixing terminal 222, a sliding terminal 231, a board fixing terminal 232, a rotating part 261, a torque management part 262, a negative electrode connecting terminal 271, and the like.
The case 211 is hollow and substantially cylindrical, and has an opening hole for inserting the capacitor module 100 on the bottom surface. The pedestal part 212 is fixed to the case 211. The positive electrode connection terminal 221 is fixed to the pedestal part 212. The positive electrode connection terminal 221 is a leaf spring, for example, and is in electrical contact with the positive electrode terminal 141 of the capacitor module 100. The positive electrode connection terminal 221 is electrically connected to the substrate fixing terminal 222. The sliding terminal 231 is located around the bottom opening hole of the case 211 and has a substantially donut plate shape. The sliding terminal 231 is electrically connected to the board fixing terminal 232.
The rotating part 261 is substantially cylindrical. The negative electrode connection terminal 271 is located on the inner side of the rotating part 261 and has a female screw shape that engages with the negative electrode terminal 142 of the capacitor module 100, and is in electrical contact with the negative electrode terminal 142. The lower end of the negative electrode connection terminal 271 has a substantially donut plate shape, and comes into contact with the sliding terminal 231 for electrical connection. Thereby, the negative electrode connection terminal 271 is electrically connected to the substrate fixing terminal 222.
The rotating unit 261 is rotatable. The torque management unit 262 is fixed to the rotating unit 261. The torque management unit 262 rotates together with the rotating unit 261 and restricts the rotation of the rotating unit 261.

FIG. 7 is a bottom sectional view showing the structure of the capacitor fixing portion 200 in this embodiment.
The pedestal part 212 has, for example, a gear shape having shuriken-like teeth.
The torque management unit 262 has a plurality of leaf springs 263. The leaf spring 263 meshes with the teeth of the pedestal portion 212, thereby suppressing the rotation of the torque management portion 262. When the torque applied to the torque management unit 262 is counterclockwise, the plate spring 263 is hooked on the teeth of the pedestal unit 212, so the torque management unit 262 does not rotate. When the torque applied to the torque management unit 262 is clockwise, the torque management unit 262 does not rotate if the torque is small, but if the torque is large, the leaf spring 263 is deformed and the torque management unit 262 rotates. To do.

When the user attaches the capacitor module 100 to the capacitor fixing part 200, the negative electrode terminal 142 of the capacitor module 100 is screwed into the negative electrode connection terminal 271 of the capacitor fixing part 200 and rotated clockwise. Even if the positive electrode terminal 141 comes into contact with the positive electrode connection terminal 221, if the user continues to rotate the capacitor module 100, the capacitor module 100 will not enter further, so together with the capacitor module 100, the rotating unit 261. The force which the torque management part 262 tries to rotate acts. As a result, the torque management unit 262 idles, so that damage due to excessive torque can be prevented.
Conversely, when the user removes the capacitor module 100 from the capacitor fixing portion 200, the capacitor module 100 is rotated counterclockwise. The rotation unit 261 and the torque management unit 262 do not rotate, and only the capacitor module 100 rotates and is removed.
Note that a sound such as a click sound may be generated when the torque management unit 262 idles. Thereby, the user can perceive the idling of the torque management unit 262. For example, by describing “Please screw in until the click sound is heard” in the instruction manual, the user rotates the capacitor module 100 until the torque management unit 262 rotates idle. As a result, the user can reliably attach the capacitor module 100, and the occurrence of contact failure due to poor attachment of the capacitor module 100 can be prevented.

  Since the capacitor module 100 can be easily replaced, the life of the power supply device 830 as a whole can be extended by the user replacing the capacitor module 100 when the electrolytic capacitor 110 reaches the end of its life.

  Moreover, since the cover 170 covers the electrolytic capacitor 110, an electric shock can be prevented. Furthermore, since the discharge circuit 130 discharges the electrolytic capacitor 110, an electric shock can be prevented. When the capacitor module 100 is removed, first, the positive electrode terminal 141 and the positive electrode connection terminal 221 are separated from each other, and thereafter, the negative electrode terminal 142 and the negative electrode connection terminal 271 are separated from each other. For this reason, the electrolytic capacitor 110 can be reliably discharged, and an electric shock can be prevented.

  In addition, when the explosion-proof valve of the electrolytic capacitor 110 is operated, steam is released from the gas vent 171, so that the capacitor module 100 can be prevented from being destroyed.

  In addition, since the torque management unit 262 idles with a predetermined torque or more in a predetermined direction, it is possible to prevent the capacitor module 100 and the capacitor fixing unit 200 from being damaged due to excessive torque. In addition, since there is no destruction due to excessive torque application, the user can apply torque to the capacitor module 100 with peace of mind, and can prevent mounting failure due to insufficient torque. The configuration of the torque management unit 262 is merely an example, and other configurations may be used as long as the torque can be released when a predetermined torque or more is applied in a predetermined direction. Furthermore, when the torque management unit 262 idles, a sound is generated, so that attachment failure can be prevented more reliably.

  Further, instead of providing the torque management unit 262 in the capacitor fixing unit 200, a configuration may be adopted in which a torque management unit is provided on the capacitor module 100 side. In that case, since it is considered that the user grasps the cover 170 and rotates the capacitor module 100, the torque management unit is configured so that, for example, only the cover 170 rotates freely.

  Moreover, the position of the capacitor | condenser fixing | fixed part 200 in the lighting fixture 800 should just be a position where a user can replace | exchange the capacitor | condenser module 100 easily, and may be another position. Capacitor fixing portion 200 may be directly exposed from power supply device 830, or may be configured such that wiring is drawn from power supply device 830 and provided at a position where replacement is easier.

Embodiment 2. FIG.
The second embodiment will be described with reference to FIGS.
In addition, about the part which is common in Embodiment 1, the same code | symbol is attached | subjected and description is abbreviate | omitted.

FIG. 8 is a front view and a cross-sectional view showing the structure of the capacitor module 100 in this embodiment.
The front view is a side view and a bottom view. The cross-sectional view is a side view cross-sectional view.
The capacitor module 100 includes an attachment / detachment detection terminal 143, an insulating part 162, and a life display part 173 in addition to the configuration described in the first embodiment.
The negative electrode terminal 142 and the attachment / detachment detection terminal 143 have a shape in which the negative electrode terminal 142 described in Embodiment 1 is divided into two parts by an insulating portion 162. The insulating part 162 insulates between the negative electrode terminal 142 and the attachment / detachment detection terminal 143. Both the negative electrode terminal 142 and the attachment / detachment detection terminal 143 are in electrical contact with the negative electrode connection terminal 271. The attachment / detachment detection terminal 143 is located closer to the electrolytic capacitor 110 than the negative electrode terminal 142, and the negative electrode terminal 142 is located closer to the positive electrode terminal 141 than the attachment / detachment detection terminal 143. Thus, in the process of attaching the capacitor module 100, the negative electrode terminal 142 contacts the negative electrode connection terminal 271 prior to the attachment / detachment detection terminal 143, and in the process of removing the capacitor module 100, the attachment / detachment detection terminal 143 precedes the negative electrode terminal 142. And away from the negative electrode connection terminal 271.
The life display unit 173 is provided at a position that is easy for the user to visually recognize, such as the tip of the cover 170. The life display unit 173 is composed of a paint (a load reversible temperature indicating paint) that irreversibly discolors when experiencing a high temperature above a predetermined level. When the explosion-proof valve of the electrolytic capacitor 110 is operated, high-temperature steam is ejected, so that the temperature of the cover 170 rises and the life display portion 173 changes color. Thereby, even if the cover 170 is opaque, the user can be informed that the explosion-proof valve has been operated (that is, the electrolytic capacitor 110 has reached the end of its life). The life display unit 173 may be configured to combine a paint that changes color due to a high temperature and a paint that does not change color so that characters such as “Replace the capacitor module” appear when the explosion-proof valve operates. Further, the cover 170 may be transparent or semi-transparent, and the life display unit 173 may be provided inside the cover 170. In this case, the life display unit 173 may be configured to display that the explosion-proof valve of the electrolytic capacitor 110 is operated in response to the moisture of the electrolytic solution instead of the temperature.
The gas vent 172 is different from the gas vent 171 described in Embodiment 1 and has a slit shape, but the function is the same as that of the gas vent 171, and the gas vent 172 was ejected by the operation of the explosion-proof valve. Let the steam escape.
The life display unit 173 is desirably arranged at a position corresponding to the front of the explosion-proof valve of the electrolytic capacitor 110. Thereby, the life display part 173 can be reliably discolored by operation | movement of an explosion-proof valve.

  When the explosion-proof valve of the electrolytic capacitor 110 operates, the power supply device 830 stops operating due to the protection function, and thus the lighting fixture 800 is turned off. At this time, the user sees the display of the life display unit 173 and understands the cause of the turn-off. Since the capacitor module 100 is configured to be easily replaced by a user, the lighting fixture 800 can be turned on by replacing the capacitor module 100 by the user.

FIG. 9 is a circuit diagram showing a circuit configuration of the capacitor module 100 according to this embodiment.
In addition to the discharge resistor R31, the discharge circuit 130 includes a pull-up resistor R32, a switching element Q33, a constant voltage diode Z34, and the like. The pull-up resistor R32 (connection determination unit) is electrically connected between the positive electrode terminal 141 and the attachment / detachment detection terminal 143. The switching element Q33 has three terminals (a reference terminal, a control terminal, and a controlled terminal). The switching element Q33 is, for example, an enhancement type nMOSFET. The switching element Q33 is turned on when a potential difference between a control terminal (for example, a gate terminal) and a reference terminal (for example, a source terminal) is equal to or higher than a predetermined threshold voltage, so that the controlled terminal (for example, a drain terminal) and a reference terminal When the terminal is electrically connected and the potential difference between the control terminal and the reference terminal is less than the threshold voltage, the terminal is turned off and the controlled terminal and the reference terminal are insulated. The controlled terminal of the switching element Q33 is electrically connected to one end of the discharge resistor R31, the reference terminal is electrically connected to the negative terminal 142, and the control terminal is electrically connected to the attachment / detachment detection terminal 143. The constant voltage diode Z34 is, for example, a Zener diode. The constant voltage diode Z34 prevents current from flowing when the voltage at both ends reaches a predetermined threshold voltage, so that the voltage at both ends does not exceed the threshold voltage. The high potential side terminal (cathode terminal) of the constant voltage diode Z34 is electrically connected to the control terminal of the switching element Q33. The low potential side terminal (anode terminal) of the constant voltage diode Z34 is electrically connected to the reference terminal of the switching element Q33. The threshold voltage of the constant voltage diode Z34 is higher than the threshold voltage of the switching element Q33 and lower than the withstand voltage (for example, 30 V) between the control terminal and the reference terminal of the switching element Q33.

  When attaching the capacitor module 100 to the capacitor fixing part 200, first, the negative electrode terminal 142 contacts the negative electrode connection terminal 271, then the attachment / detachment detection terminal 143 contacts the negative electrode connection terminal 271, and finally the positive electrode terminal 141 The positive electrode connection terminal 221 is contacted. When the negative electrode terminal 142 and the attachment / detachment detection terminal 143 are in contact with and electrically connected to the negative electrode connection terminal 271, the potential of the control terminal of the switching element Q33 becomes the same low potential as the reference terminal. For this reason, the switching element Q33 is turned off, and no current flows through the discharge resistor R31. Therefore, unlike Embodiment 1, there is no power loss in discharge resistor R31 during operation. Since power loss due to the current flowing through the pull-up resistor R32 occurs, it is desirable that the resistance value of the pull-up resistor R32 is large.

When removing the capacitor module 100 from the capacitor fixing part 200, first, the positive electrode terminal 141 is separated from the positive electrode connection terminal 221, then the attachment / detachment detection terminal 143 is separated from the negative electrode connection terminal 271, and finally, the negative electrode terminal 142 is connected to the negative electrode. The terminal 271 is separated.
When the positive electrode terminal 141 is separated from the positive electrode connection terminal 221, the electrolytic capacitor 110 is disconnected from the power supply device 830. However, since the electrolytic capacitor 110 is charged, the potential of the positive electrode terminal 141 remains high.
Next, when the attachment / detachment detection terminal 143 is separated from the negative electrode connection terminal 271, the current flowing through the pull-up resistor R32 flows through the constant voltage diode Z34. If the voltage across the electrolytic capacitor 110 is greater than the threshold voltage of the constant voltage diode Z34, the voltage across the constant voltage diode Z34 becomes equal to the threshold voltage. Since the threshold voltage of the constant voltage diode Z34 is higher than the threshold voltage of the switching element Q33, the switching element Q33 is turned on, a current flows through the discharge resistor R31, and the electrolytic capacitor 110 is discharged.
Since the threshold voltage of the constant voltage diode Z34 is lower than the withstand voltage between the control terminal and the reference terminal of the switching element Q33, it is possible to prevent the occurrence of a failure due to an overvoltage applied between the control terminal and the reference terminal of the switching element Q33. Note that when the withstand voltage between the control terminal and the reference terminal of the switching element Q33 is larger than the maximum voltage charged in the electrolytic capacitor 110, the constant voltage diode Z34 may be omitted.

  Unlike the first embodiment, there is no power loss in the discharge resistor R31 during operation, so the resistance value of the discharge resistor R31 can be reduced. For this reason, even when the capacitance of the electrolytic capacitor 110 is large or when the voltage across the electrolytic capacitor 110 during operation is large, the electrolytic capacitor 110 is quickly discharged to a safe voltage without risk of electric shock. Can be lowered.

In this way, it is determined whether or not the capacitor module 100 is connected to the capacitor fixing unit 200. When the capacitor module 100 is connected to the capacitor fixing unit 200, the electrolytic capacitor 110 is not discharged and the capacitor module is discharged. Only when 100 is not connected to the capacitor fixing unit 200, the power loss during the operation of the power supply device 830 can be suppressed by discharging the electrolytic capacitor 110.
Note that the configuration for determining whether or not the capacitor module 100 is connected to the capacitor fixing unit 200 (connection determination unit) or the electrolytic capacitor 110 is discharged only when the capacitor module 100 is not connected to the capacitor fixing unit 200. The configuration for doing this is an example, and other configurations may be used. For example, instead of the switching element Q33, when the capacitor module 100 is connected to the capacitor fixing unit 200, a configuration may be provided in which a mechanical switch that operates in contact with the capacitor fixing unit 200 is provided.

  As described above, the configuration described in each embodiment is an example. For example, the configuration described in different embodiments may be combined, or the configuration of an unimportant part may be replaced with another configuration such as a known configuration. A replaced configuration may be used.

  DESCRIPTION OF SYMBOLS 100 Capacitor module, 110 Electrolytic capacitor, 120,831 Board | substrate, 130 Discharge circuit, 141 Positive electrode terminal, 142 Negative electrode terminal, 143 Detachment detection terminal, 151,152 Wiring, 161,162 Insulation part, 170 Cover, 171,172 Gas vent , 173 Life display unit, 200 capacitor fixing unit, 211 case, 212 pedestal unit, 221 positive electrode connection terminal, 222, 232 substrate fixing terminal, 231 sliding terminal, 261 rotating unit, 262 torque management unit, 263 leaf spring, 271 negative electrode Connection terminal, 800 lighting fixture, 810 main body, 820 light source, 830 power supply device, 840 light source circuit, AC AC power supply, R31 discharge resistance, R32 pull-up resistance, Q33 switching element, Z34 constant voltage diode.

Claims (11)

A capacitor module comprising: an electrolytic capacitor; a positive electrode terminal electrically connected to the positive electrode of the electrolytic capacitor; a negative electrode terminal electrically connected to the negative electrode of the electrolytic capacitor; and a discharge circuit for discharging the electrolytic capacitor;
A positive electrode connection terminal that contacts and electrically connects with the positive electrode terminal; a negative electrode connection terminal that contacts and electrically connects with the negative electrode terminal; and a capacitor fixing portion that removably fixes the capacitor module. A featured power supply.   When the capacitor fixing part is removed, the connection between the positive terminal and the positive connection terminal is released before the connection between the negative terminal and the negative connection terminal. The power supply device according to claim 1. The negative electrode terminal has a male screw shape,
The positive terminal is located at the tip of the negative terminal shaft;
The negative electrode connection terminal has a female screw shape screwed with the negative electrode terminal,
The positive electrode connection terminal is located on an axis of the negative electrode connection terminal, and contacts the positive electrode terminal when the negative electrode terminal and the negative electrode connection terminal are screwed together. 2. The power supply device according to 2.   The power supply according to claim 3, wherein the capacitor fixing unit or the capacitor module includes a torque management unit that releases torque for tightening the capacitor module when the positive electrode terminal and the positive electrode connection terminal are in contact with each other. apparatus. The capacitor module
A connection determination unit for determining whether or not the capacitor module is connected to the capacitor fixing unit;
5. The discharge circuit according to claim 1, wherein the discharge circuit discharges the electrolytic capacitor when the connection determination unit determines that the capacitor module is not connected to the capacitor fixing unit. The power supply device described in 1. The capacitor module
6. The apparatus according to claim 1, further comprising a cover for venting gas generated when the explosion-proof valve of the electrolytic capacitor is operated, and a cover surrounding the electrolytic capacitor. The power supply device described in 1. The capacitor module
The power supply device according to any one of claims 1 to 6, further comprising a life display unit that detects and displays that the explosion-proof valve of the electrolytic capacitor is activated.   8. The power supply device according to claim 7, wherein the life display unit is a paint that irreversibly discolors when a high temperature exceeding a predetermined level is experienced. A power supply device according to any one of claims 1 to 8,
A lighting apparatus comprising: a light source that is turned on by electric power supplied from the power supply device.   The lighting fixture according to claim 9, wherein the capacitor fixing portion is provided at a position where the capacitor module can be replaced.   A capacitor module comprising: an electrolytic capacitor; a positive electrode terminal electrically connected to a positive electrode of the electrolytic capacitor; a negative electrode terminal electrically connected to a negative electrode of the electrolytic capacitor; and a discharge circuit for discharging the electrolytic capacitor.

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