JP4579741B2 - Power supply device and data processing device - Google Patents

Description

  The present invention relates to a power supply device that supplies a voltage from a DC power supply to a load, and a data processing device in which a package including the power supply device and a data processing circuit is detachably mounted, and in particular, a power supply line in the power supply device and The present invention relates to a power supply device and a data processing circuit including a filter for reducing noise conducted through a ground line.

  In a telecommunications carrier's office, etc., a large number of packages on which circuits for communication processing are mounted are detachably mounted on the shelf, and such a large number of shelves are connected to a common station power source. There are systems in which power is supplied to each package. Each package in such a shelf is equipped with an on-board power supply (OBP), which converts the voltage from the local power supply into the voltage of the processing circuit in the package. Further, the OBP primary circuit is generally provided with a filter circuit for preventing EMI (Electro Magnetic Compatibility) conduction noise in the power supply line.

FIG. 13 is a diagram illustrating a configuration example of a power supply unit of a conventional in-house device.
As shown in FIG. 13, the station power supply is provided with a DC power supply E that generates a negative voltage (eg, −48V). Then, power is supplied to the package through the shelf by a common ground (CG) line on the positive electrode side and a negative power line on the negative electrode side of the DC power supply E. In addition to the above, a frame ground (FG) line is provided in the package, and this FG line is commonly connected to the CG line in the office building power supply. In the shelf, the FG line is connected to the CG line and the negative power supply line via line bypass capacitors C1 and C2, respectively.

  Inside the package, a common mode choke coil L1, an inrush current control FET (Field-Effect Transistor) 110, a fuse H1, and a rectifying diode D1 are connected in series to the negative power line, and a common to the CG line. A mode choke coil L2 is connected in series. The negative power supply line and the CG line are connected to the input / output insulation type on-board power supply circuit 120, and the power supply voltage converted by the OBP 120 is supplied to the load 130. In the primary side circuit of the OBP 120, a power supply monitoring control circuit 140 is connected between the negative power supply line and the CG line. The power supply monitoring control circuit 140 detects the voltage between the negative power supply line and the CG line and controls on / off of the FET 110 to prevent inrush current from flowing into the circuit in the package.

  Further, in the primary circuit, a capacitor and a resistor that perform a filter function for reducing noise and preventing power oscillation by combining with the common mode choke coils L1 and L2 are connected in parallel between the negative power supply line and the CG line. Has been. Capacitor C3 reduces normal mode EMI conduction noise. Capacitors C4 and C5 are provided in series between the negative power supply line and the CG line, and are connected to the FG line at an intermediate point between them to reduce EMI conduction noise in the negative power supply side common mode and the CG side common mode, respectively. To reduce.

  Capacitors C6 and C7 are provided in series between the negative power supply line and the CG line, and are connected to the FG line at an intermediate point therebetween, thereby reducing EMI conduction noise from the circuit side of the OBP 120 and the load 130. The capacitor C8 and the resistor R1 are provided in series between the negative power supply line and the CG line, and the capacitor C9 provided in parallel with these prevents the power oscillation due to the input parasitic inductance including the connection cable to the station power supply. To do.

  In the secondary circuit, a smoothing capacitor C10 is connected in parallel with the load 130. In the example of FIG. 13, the signal ground (SG) line of the load 130 is shared with the FG line. However, these lines may be provided independently.

As a conventional power supply device, a capacitor for smoothing an AC input power supply and a discharging means connected in parallel to this capacitor are provided, and when a power interruption is detected by a power control signal, the terminal voltage of the capacitor is detected by the discharging means. There is a power supply device that automatically discharges (see, for example, Patent Document 1). In addition, a capacitor for preventing power supply noise of a commercial AC power supply, a discharging resistor connected in parallel to the capacitor, and a switch connected in series to the discharging resistor are provided, and the switch is closed when the power supply is not energized. There was also a power supply device configured as described above (for example, see Patent Document 2).
JP-A-62-107678 (page 2 to page 3, FIG. 1) JP 2002-218757 A (paragraph numbers [0022] to [0023], FIG. 2)

  However, in the circuit of the power supply unit as shown in FIG. 13, when the package is removed from the shelf after power is supplied to the load 130, the electric charge remains accumulated in the capacitors C <b> 3 to C <b> 9 in the circuit. When the package is inserted into the shelf again from this state, the residual charges of the capacitors C3 to C9 are discharged, and noise due to this discharge causes the power supply voltage level to other packages sharing the DC power supply E to fluctuate. When the output of the DC power source E is turned off and then turned on again, similar noise due to discharge is generated. For example, other devices that share the DC power supply E may reset the operation when such noise is detected, and the operation of the devices in the station becomes unstable due to discharge.

  The present invention has been made in view of these points, and an object of the present invention is to provide a power supply apparatus in which fluctuations in the power supply level due to discharge of electric charge remaining in a capacitor of a noise filter are prevented.

  Another object of the present invention is data in which power supply level fluctuations due to discharge of electric charge remaining in a capacitor of a noise filter are prevented when a package including a power supply circuit and a data processing circuit is detachably mounted. It is to provide a processing device.

  In the present invention, in order to solve the above-described problem, in a power supply apparatus for supplying a voltage from a DC power source E to a load 130 as shown in FIG. 1, the voltage from the DC power source E is converted into a predetermined voltage and An insulated on-board power supply circuit 120 supplied to the load 130, and a power supply line and a ground line for transmitting a voltage from the DC power supply E to the on-board power supply circuit 120 on the primary side of the on-board power supply circuit 120 A noise filter comprising common mode choke coils L1 and L2 connected in series to each other, and one or more capacitors C3 to C9 connected between the power supply line and the ground line, the power supply line and the The noise filter capacitors C3 to C9 are connected in parallel between the on-board power supply circuit 120 and the front line. Between the DC power source E is opened when energized state, the power supply apparatus characterized by a switch circuit which is short-circuited during the non-energized state is provided.

  In such a power supply device, the voltage from the DC power supply E is converted into a predetermined voltage by the on-board power supply circuit 120 and then supplied to the load 130. The primary side of the on-board power supply circuit 120 includes common mode choke coils L1 and L2 connected in series to the power supply line and the ground line, respectively, and one or more capacitors C3 to C3 connected between the lines. A noise filter composed of C9 is provided, and EMI conduction noise conducted through each line is reduced by this noise filter.

  Further, a switch circuit (for example, switches SW1 and SW2 in the drawing) connected in parallel with the capacitors C3 to C9 of the noise filter is connected between the power supply line and the ground line. This switch circuit is opened when the on-board power supply circuit 120 and the DC power supply E are energized. For example, the connection with the DC power supply E is disconnected or the output of the DC power supply E is stopped. Shorted when energized. When the on-board power supply circuit 120 and the DC power supply E shift from the energized state to the non-energized state, electric charge remains in the capacitors C3 to C9 of the noise filter. C3-C9 charges are discharged.

  According to the power supply device of the present invention, when the on-board power supply circuit and the DC power supply shift from the energized state to the non-energized state, the charge remaining in the capacitor of the noise filter is discharged by short-circuiting the switch circuit. Therefore, when the energized state is turned on again, the residual charge is not discharged. Accordingly, the generated voltage of the DC power supply is prevented from fluctuating due to the discharge of the residual charge, and, for example, a situation in which an operation failure due to power supply level fluctuation occurs in another device driven by a common DC power supply is avoided. The operation of the peripheral device can be stabilized.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. Here, an example in which the present invention is applied to an in-station device installed in a telecommunications carrier's station will be described.
FIG. 2 is a diagram illustrating an overall configuration of the in-station device according to the embodiment.

  In the in-station apparatus shown in FIG. 2, power is commonly supplied from one station power supply 10 to the three data processing apparatuses 21 to 23. The station building power supply 10 outputs a negative power supply of −48V, for example. Each of the data processing devices 21 to 23 includes shelves 31, 32a, 32b, and 33 on which various communication processing circuits are mounted. Of these, the data processing device 22 includes, for example, two shelves 32a and 32b, and is configured to transmit and receive information between the shelves 32a and 32b. Furthermore, information may be transmitted and received between the data processing devices 21 to 23. In addition, as will be described later, a negative power supply line, a common ground (CG) line, a signal ground (SG) line (or a frame ground (FG) line may be provided between the station power supply 10 and the data processing devices 21 to 23. Are connected by each power line.

FIG. 3 is a perspective view illustrating a configuration example of the shelf.
The shelf 30 shown in FIG. 3 is equipped with various communication processing circuits and an on-board power supply circuit (OBP) that converts and supplies a power supply voltage from the station power supply 10 to the communication processing circuit. A plurality of packages 40 are mounted in a state where they can be inserted and removed. Inside the shelf 30 are provided mounting grooves and wiring parts (both not shown) for mounting the packages 40. With such a configuration, it is possible to easily cope with expansion, update, inspection, etc. of the communication system.

FIG. 1 is a diagram illustrating a first configuration example of a power supply circuit provided in each package.
FIG. 1 also shows a schematic configuration of the internal power supply 10 and the internal circuit of the shelf 30 together with the power supply circuit in the package 40. In FIG. 1, a DC power source E provided in a station power source 10 generates a negative voltage. The DC power source E has a CG line on the positive electrode side and a negative power source line on the negative electrode side. Power is supplied. In addition, an FG line is provided in the package 40 separately from these, and this FG line is commonly connected to the CG line inside the station power supply 10. In the shelf 30, the FG line is connected to the CG line and the negative power supply line via line bypass capacitors C1 and C2, respectively.

  Inside the package 40, a common mode choke coil L1, an inrush current control FET (Field-Effect Transistor) 110, a fuse H1, and a rectifier diode D1 are connected in series to the negative power line, and to the CG line. A common mode choke coil L2 is connected in series. The OBP 120 is, for example, an input / output insulation type DC / DC converter having a transformer inside, and a voltage supplied through the negative power supply line and the CG line is used to drive a communication processing circuit constituting the load 130. The voltage is converted and output to the load 130.

  In the primary side circuit of the OBP 120, a power supply monitoring control circuit 140 is connected between the negative power supply line and the CG line. The power supply monitoring control circuit 140 detects the voltage between the negative power supply line and the CG line and controls on / off of the FET 110 to prevent inrush current from flowing into the circuit in the package.

  Further, in the primary circuit, a capacitor and a resistor that perform a filter function for reducing noise and preventing power oscillation by combining with the common mode choke coils L1 and L2 are connected in parallel between the negative power supply line and the CG line. Has been. Capacitor C3 reduces normal mode EMI conduction noise. Capacitors C4 and C5 are provided in series between the negative power supply line and the CG line, and are connected to the FG line at an intermediate point between them to reduce EMI conduction noise in the negative power supply side common mode and the CG side common mode, respectively. To reduce.

  Capacitors C6 and C7 are provided in series between the negative power supply line and the CG line, and are connected to the FG line at an intermediate point therebetween, thereby reducing EMI conduction noise from the circuit side of the OBP 120 and the load 130. The capacitor C8 and the resistor R1 are provided in series between the negative power supply line and the CG line, and the capacitor C9 provided in parallel with these prevents the power oscillation due to the input parasitic inductance including the connection cable to the station power supply. To do.

  In the secondary circuit, a smoothing capacitor C10 is connected in parallel with the load 130. In the example of FIG. 1, the SG line of the load 130 is shared with the FG line, but these lines may be provided independently.

  By the way, in such a power supply circuit, when the package 40 is extracted from the shelf 30 after power is supplied to the load 130, electric charges are still accumulated in the capacitors C3 to C9 in the circuit. When the package 40 is again inserted into the shelf 30 from this state, the residual charges of the capacitors C3 to C9 are discharged, and noise due to this discharge causes the power supply voltage level to other packages sharing the DC power supply E to fluctuate. As a result, an operation reset or the like may occur in these packages, resulting in unstable operation. Further, when the output of the DC power source E is turned off and then turned on again, similar noise due to discharge can be generated.

  Therefore, in the power supply circuit of FIG. 1, the discharge resistor R11, the switch SW1, the discharge resistor R12, and the switch SW2 are connected in series between the negative power supply line and the CG line of the primary circuit, and the switch SW1 and the discharge resistor R12 are connected. Is connected to the SG line. Further, a switch control circuit 150 is provided for controlling the opening and closing of the switches SW1 and SW2 in accordance with the detection voltage between the negative power supply line and the CG line by the power supply monitoring control circuit 140.

  Here, when the package 40 is inserted into the shelf 30 and the power supply voltage from the DC power supply E is supplied, the switches SW1 and SW2 are opened by the control of the switch control circuit 150. After that, when the package 40 is pulled out from the shelf 30 or the output of the DC power supply E is turned off, the power supply monitoring control circuit 140 detects a voltage drop between the negative power supply line and the CG line. The switch control circuit 150 determines that the power is off based on the detection result of the power monitoring control circuit 140 and closes the switches SW1 and SW2, thereby discharging the charges accumulated in the capacitors C3 to C9.

  For example, for the capacitors C5 and C7, a closed loop including one of these terminals, the node N1 of the CG line, the discharge resistor R11, the node N2 of the switches SW1 and FG lines, and the other terminals of the capacitors C5 and C7 is formed. Thus, the accumulated charge is discharged. In addition, the capacitors C4 and C6 are charged by a closed loop composed of one of these terminals, the negative power supply line node N3, the switch SW2, the discharge resistor R12, the FG line node N2, and the other terminals of the capacitors C4 and C6. Discharged. In addition, the capacitors C3, C8, and C9 discharge the accumulated charges when the negative power supply line and the CG line are short-circuited by the switches SW1 and SW2.

  In this way, when the power is off, the accumulated charges of the capacitors C3 to C9 are discharged, and the voltage between the power supply line and the CG line in the package 40 is lowered, so that the package 40 is subsequently shelf-shelfed. When the power supply from the DC power source E is restarted, the other packages 40 in the same shelf sharing the DC power source E or the packages 40 in the other shelves Noise that fluctuates the voltage of the power supply terminal is not generated. Therefore, the occurrence of reset in other packages 40 is prevented, and the operation in the system sharing the DC power source E can be stabilized and the reliability can be improved. Moreover, the cost of the insertion / extraction test of the package 40 to the shelf 30 can be reduced by improving the reliability.

  Furthermore, since the unstable factor of the operation in the system has been removed, the capacities of the capacitors C3 to C9 are no longer limited, and these capacities can be increased, which is optimal for preventing EMI conduction noise and power supply oscillation. It becomes possible to construct a filter circuit with various specifications. Therefore, design development for clearing the EMI standard is facilitated, and the manufacturing cost can be reduced.

In addition, since the switches SW1 and SW2 are provided, no current flows through the discharge resistors R11 and R12 when the power is on, so that excessive power consumption is suppressed.
In the case of a communication device or the like, it is necessary to increase the withstand voltage between the primary side and the secondary side of the OBP 120 so that the power supply voltage fluctuation on the primary side does not affect the data processing at the load 130. Therefore, in the circuit of FIG. 1, an input / output insulation type OBP 120 is used, and the primary side and secondary side grounds (that is, CG and SG) are separated. However, when the discharge resistors R11 and R12 are provided without the switches SW1 and SW2 and are connected to the FG line at the connection points of the resistors, in order to increase the withstand voltage, high breakdown voltage components are used as the discharge resistors R11 and R12. Need to use. On the other hand, by providing the switches SW1 and SW2 as shown in FIG. 1 and opening them when the power is on, it is possible to connect the primary side without using the high breakdown voltage discharge resistors R11 and R12. The insulation from the secondary side can be ensured, and the use of high-voltage components can prevent the increase in component cost, mounting area, and power consumption.

Next, modified examples of the power supply circuit shown in FIG. 1 are shown in FIGS. In these drawings, components corresponding to those in FIG. 1 are denoted by the same reference numerals, and description thereof is omitted.
FIG. 4 is a diagram illustrating a second configuration example of the power supply circuit provided in each package.

  FIG. 4 shows an example in which a relay switch is used as a switch for preventing discharge to the discharge resistors R11 and R12 when the power is on. In FIG. 4, voltages are detected by coils L11 and L12 connected between the negative power supply line and the CG line, and when these detected voltages drop below a certain value, they are connected in series with discharge resistors R11 and R12. A normally-on type relay switch is configured such that the switches SW11 and SW12 provided in the circuit are short-circuited. As a result, it is possible to automatically detect that the package 40 has been pulled out or that the output of the DC power source E has been turned off, and the accumulated charges in the capacitors C3 to C9 can be discharged, as in the circuit of FIG. The effect is obtained.

FIG. 5 is a diagram illustrating a third configuration example of the power supply circuit provided in each package.
FIG. 5 shows a power supply circuit having a configuration in which the discharge resistors R11 and R12 are removed from the configuration of FIG. With such a configuration, the discharge time of the capacitors C3 to C9 can be shortened.

FIG. 6 is a diagram illustrating a fourth configuration example of the power supply circuit provided in each package.
FIG. 6 shows an example in which a relay switch using a photo MOSFET (Metal Oxide Semiconductor-FET) is used as a switch for preventing discharge in a power-on state. In FIG. 6, normally-on type relay switches are respectively formed by photodiodes PD1 and PD2 connected between the negative power supply line and the CG line, and switches SW21 and SW22 connected in series to discharge resistors R11 and R12. Thus, the switches SW21 and SW22 are short-circuited when the light amounts of the photodiodes PD1 and PD2 drop below a certain amount.

FIG. 7 is a diagram illustrating a fifth configuration example of the power supply circuit provided in each package.
FIG. 7 shows a power supply circuit having a configuration in which the discharge resistors R11 and R12 are removed from the configuration of FIG. With such a configuration, the discharge time of the capacitors C3 to C9 can be shortened.

Although not shown, the discharge time can also be shortened by removing the discharge resistors R11 and R12 in the configuration of FIG.
In each circuit configuration example described above, the FG line is used as the discharge path. However, as shown in FIGS. 8 to 12 below, the accumulated charges of the capacitors C3 to C9 using only the negative power supply line and the CG line. It is good also as a structure which discharges. In addition, in the following FIGS. 8-12, the same code | symbol is attached | subjected and shown to the structure corresponding to FIG. 1, and those description is abbreviate | omitted.

FIG. 8 is a diagram illustrating a sixth configuration example of the power supply circuit provided in each package.
In FIG. 8, in the circuit on the primary side of the OBP 120, a switch SW31 and a discharge resistor R21 are connected in series between the negative power supply line and the CG line. Further, similarly to the case of FIG. 1, a switch control circuit 150 is provided that controls opening and closing of the switch SW31 according to a detection voltage between the negative power supply line and the CG line by the power supply monitoring control circuit 140.

  That is, when the voltage between the negative power supply line and the CG line drops below a certain value by removing the package 40 from the shelf 30 or turning off the output of the DC power supply E, the switch control circuit 150 turns off the power supply. It is determined that the state has been reached, and the switch SW31 is short-circuited. As a result, the accumulated charges in the capacitors C3 to C9 are discharged using the negative power supply line, the CG line, and the discharge resistor R21 as a discharge path.

  As a result, when the power supply is subsequently restored, noise that fluctuates the power supply voltage supplied to other packages sharing the DC power supply E does not occur, and the operation of the entire apparatus is stabilized. In addition, since the ground line remains separated between the primary side and the secondary side of the OBP 120, the withstand voltage between the primary side and the secondary side does not decrease, and the fluctuation of the power supply voltage for the data processing in the load 130 does not decrease. The influence can be suppressed.

FIG. 9 is a diagram illustrating a seventh configuration example of the power supply circuit provided in each package.
FIG. 9 shows an example in which a relay switch is used as a switch for preventing discharge in a power-on state. In FIG. 9, the voltage is detected by the coil L13 connected between the negative power supply line and the CG line, and when these detected voltages drop below a certain value, they are provided in series with the discharge resistor R21. A normally-on type relay switch is configured such that the switch SW41 is short-circuited. As a result, it is possible to automatically detect that the package 40 has been pulled out or that the output of the DC power supply E has been turned off, and the accumulated charges in the capacitors C3 to C9 can be discharged.

FIG. 10 is a diagram illustrating an eighth configuration example of the power supply circuit provided in each package.
FIG. 10 shows a power supply circuit having a configuration in which the discharge resistor R21 is removed from the configuration of FIG. With such a configuration, the discharge time of the capacitors C3 to C9 can be shortened.

FIG. 11 is a diagram illustrating a ninth configuration example of the power supply circuit provided in each package.
FIG. 11 shows an example in which a relay switch using a photo MOSFET is used as a switch for preventing discharge in a power-on state. In FIG. 11, a normally-on type relay switch is configured by the photodiode PD3 connected between the negative power supply line and the CG line, and the switch SW51 connected in series to the discharge resistor R21. When the amount of light falls below a certain amount, the switch SW51 is short-circuited, and the accumulated charges in the capacitors C3 to C9 are discharged.

FIG. 12 is a diagram illustrating a tenth configuration example of the power supply circuit provided in each package.
FIG. 12 shows a power supply circuit having a configuration in which the discharge resistor R21 is removed from the configuration of FIG. With such a configuration, the discharge time of the capacitors C3 to C9 can be shortened.

Although not shown, the discharge time can also be shortened by removing the discharge resistor R21 in the configuration of FIG.
Further, the switches for preventing discharge in the power-on state and the voltage detection means between the negative power supply line and the CG line are not limited to those used in FIGS. A circuit having a configuration can be used. Further, in place of the voltage detecting means, means for detecting the presence or absence of energization from the DC power source E such as a circuit for mechanically or electrically detecting the insertion / extraction state of the package 40 to / from the shelf 30 is provided so that the energization state is lost. The switch may be short-circuited.

  Further, as the package 40, a package on which various information processing circuits other than the communication processing circuit are mounted can be applied. The package 40 may be a single printed wiring board on which, for example, a semiconductor integrated circuit or various electrical components are mounted, or a plurality of such printed wiring boards are mounted and the boards are wired to each other. Good.

(Supplementary note 1) In a power supply device for supplying a voltage from a DC power supply to a load,
An insulated on-board power supply circuit that converts the voltage from the DC power supply into a predetermined voltage and supplies the voltage to the load;
On the primary side of the on-board power supply circuit, a common mode choke coil connected in series to a power supply line and a ground line for transmitting a voltage from the DC power supply to the on-board power supply circuit, respectively, the power supply line and the power supply line A noise filter comprising one or more capacitors connected between the ground line;
The noise filter capacitor is connected in parallel between the power supply line and the ground line, and is opened when the on-board power supply circuit and the DC power supply are energized, and short-circuited when not energized. A switched circuit,
A power supply device comprising:

(Additional remark 2) As a capacitor | condenser which comprises the said noise filter, it connected in series between the said power supply line and the said ground line, and each connection point was connected to the frame ground line isolate | separated from the said ground line, and 1st and Comprising a second capacitor;
Note that the switch circuit includes first and second switch circuits connected in series between the power supply line and the ground line, and each connection point connected to the frame ground line. The power supply device according to 1.

(Supplementary note 3) The power supply device according to supplementary note 2, wherein at least one discharge resistor is connected in series to the first and second switch circuits.
(Supplementary note 4) The power supply device according to supplementary note 2, wherein the first and second switch circuits are connected to the power supply line and the ground line on the DC power supply side from the common mode choke coil.

  (Supplementary note 5) The supplementary note 2, wherein the first and second switch circuits are connected to the power supply line and the ground line between the common mode choke coil and the on-board power supply circuit. Power supply.

(Supplementary note 6) The power supply device according to supplementary note 2, wherein the frame ground line is commonly connected to a signal ground line on a secondary side of the on-board power supply circuit.
(Additional remark 7) The switch control circuit which detects the voltage between the said power supply line and the said ground line, and short-circuits the said switch circuit when a detection voltage is below a fixed value, The additional description 1 characterized by the above-mentioned. Power supply.

  (Supplementary note 8) The power supply device according to supplementary note 1, wherein the switch circuit includes a normally-on type relay circuit that opens and closes according to a voltage between the power supply line and the ground line.

  (Supplementary Note 9) The power supply according to Supplementary Note 1, wherein the switch circuit includes a normally-on type photo MOS relay circuit that opens and closes according to a voltage between the power supply line and the ground line by a photodiode. apparatus.

(Supplementary Note 10) A plurality of packages including an insulated on-board power supply circuit and a data processing circuit driven by the output voltage of the on-board power supply circuit are detachably mounted, and a DC power supply common to the plurality of packages In the data processing apparatus supplied with
Each package is
On the primary side of the on-board power supply circuit, a common mode choke coil connected in series to a power supply line and a ground line for transmitting a voltage from the DC power supply to the on-board power supply circuit, respectively, the power supply line and the power supply line A noise filter comprising one or more capacitors connected between the ground line;
The noise filter capacitor is connected in parallel between the power supply line and the ground line, and is opened when the on-board power supply circuit and the DC power supply are energized, and short-circuited when not energized. A switched circuit,
A data processing apparatus comprising:

It is a figure which shows the 1st structural example of the power supply circuit provided in each package in the in-station apparatus which concerns on embodiment. It is a figure which shows the whole structure of the in-station apparatus which concerns on embodiment. It is a perspective view which shows the structural example of a shelf. It is a figure which shows the 2nd structural example of the power supply circuit provided in each package. It is a figure which shows the 3rd structural example of the power supply circuit provided in each package. It is a figure which shows the 4th structural example of the power supply circuit provided in each package. It is a figure which shows the 5th structural example of the power supply circuit provided in each package. It is a figure which shows the 6th structural example of the power supply circuit provided in each package. It is a figure which shows the 7th structural example of the power supply circuit provided in each package. It is a figure which shows the 8th structural example of the power supply circuit provided in each package. It is a figure which shows the 9th structural example of the power supply circuit provided in each package. It is a figure which shows the 10th structural example of the power supply circuit provided in each package. It is a figure which shows the structural example of the power supply part of the conventional apparatus in a station building.

Explanation of symbols

10 Station power supply 21-23 Data processing device 30, 31, 32a, 32b, 33 Shelf 40 Package 110 FET
120 On-board power supply circuit (OBP)
130 Load 140 Power supply monitoring control circuit 150 Switch control circuit C1 to C10 Capacitor D1 Diode E DC power supply H1 Fuse L1, L2 Common mode choke coil N1 to N3 Node R1 Resistance R11, R12 Discharge resistance SW1, SW2 Switch

Claims (5)

In a power supply device that supplies a voltage from a DC power supply to a load,
An insulated on-board power supply circuit that converts the voltage from the DC power supply into a predetermined voltage and supplies the voltage to the load;
On the primary side of the on-board power supply circuit, a common mode choke coil connected in series to a power supply line and a ground line for transmitting a voltage from the DC power supply to the on-board power supply circuit, respectively, the power supply line and the power supply line A noise filter comprising one or more capacitors connected between the ground line;
The noise filter capacitor is connected in parallel between the power supply line and the ground line, and is opened when the on-board power supply circuit and the DC power supply are energized, and short-circuited when not energized. A switched circuit,
A power supply device comprising: As a capacitor constituting the noise filter, first and second capacitors connected in series between the power supply line and the ground line, and each connection point connected to a frame ground line separated from the ground line With
The switch circuit includes first and second switch circuits that are connected in series between the power supply line and the ground line, and each connection point is connected to the frame ground line. Item 1. The power supply device according to Item 1.   The power supply device according to claim 2, wherein at least one discharge resistor is connected in series to the first and second switch circuits.   The power supply apparatus according to claim 1, further comprising a switch control circuit that detects a voltage between the power supply line and the ground line, and shorts the switch circuit when the detected voltage is equal to or lower than a predetermined value. A plurality of packages including an insulated on-board power supply circuit and a data processing circuit driven by the output voltage of the on-board power supply circuit are detachably mounted, and a common DC power supply is supplied to the plurality of packages. In a data processing device,
Each package is
On the primary side of the on-board power supply circuit, a common mode choke coil connected in series to a power supply line and a ground line for transmitting a voltage from the DC power supply to the on-board power supply circuit, respectively, the power supply line and the power supply line A noise filter comprising one or more capacitors connected between the ground line;
The noise filter capacitor is connected in parallel between the power supply line and the ground line, and is opened when the on-board power supply circuit and the DC power supply are energized, and short-circuited when not energized. A switched circuit,
A data processing apparatus comprising:

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