Auxiliary power supply device, power supply device, and medical system

Abstract

The present application provides an auxiliary power supply device capable of inhibiting the overall large-scale of a system having both an auxiliary power supply circuit section and a secondary power supply circuit section. The auxiliary power supply device is an auxiliary power supply device connected to a power supply device, which has an auxiliary power supply circuit section that supplies power to the power supply device when the supply of power to the power supply device is cut off, and a secondary power supply circuit section that is connected to the power supply device at an input side and is connected to a load at an output side, and supplies an output voltage to other circuit sections based on the power supplied from the power supply device.

Description

Technical Field

[0001] This invention relates to auxiliary power supply devices, power supply devices, and medical systems. Background Technology

[0002] Research and development are underway on technologies to protect loads connected to power supply units in situations where power supply to power supply units is interrupted due to power outages or other factors.

[0003] Regarding this, a power supply device is known that includes a smoothing circuit section that smooths the output of the rectifier circuit section between the output side of the rectifier circuit section and the input side of the switching power supply section and supplies it to the switching power supply section; a second electrostatic capacitor that extends the output holding time of the switching power supply section when the AC power supply to the rectifier circuit section is cut off; and a first electrostatic capacitor that can be added to the smoothing circuit section as an auxiliary power supply device (see Patent Document 1). Furthermore, the output holding time is the time during which the switching power supply section can maintain its output when the AC power supply to the rectifier circuit section is cut off.

[0004] Existing technical documents:

[0005] Patent Document 1: Japanese Patent Application Publication No. 10-004674 Summary of the Invention

[0006] The problem that the invention aims to solve

[0007] In this context, in addition to the auxiliary power supply device described in Patent Document 1, a secondary power supply device is often added to the power supply unit. However, adding both the auxiliary power supply device and the secondary power supply device to the power supply unit is sometimes related to the increase in the size of the power supply unit. The increase in the size of the power supply unit is sometimes related to the reduction in versatility, and is therefore undesirable.

[0008] The present invention was made in consideration of the following situation, and its object is to provide an auxiliary power supply device, power supply device and medical system that can suppress the overall enlargement of a system having both an auxiliary power supply circuit section and an auxiliary power supply circuit section.

[0009] Methods for solving problems

[0010] One aspect of the present invention is an auxiliary power supply device, which is connected to a power supply device and includes: an auxiliary power supply circuit section that supplies power to the power supply device when the power supply to the power supply device is cut off; and a secondary power supply circuit section whose input side is connected to the power supply device and whose output side is connected to a load, and which supplies an output voltage to other circuit sections based on the power supplied from the power supply device.

[0011] The effects of the invention

[0012] According to the present invention, it is possible to suppress the overall size of the system having both an auxiliary power supply circuit section and a secondary power supply circuit section. Attached Figure Description

[0013] Figure 1 This is a diagram illustrating an example of the structure of the power supply system 1 involved in the implementation method.

[0014] Figure 2 This is a diagram showing another example of the structure of power supply system 1.

[0015] Figure 3 This is a diagram showing an example of the structure of a power supply device PS that is connected to an auxiliary power supply device 20.

[0016] Figure 4 This is a diagram showing another example of the structure of a power supply device PS that is connected to an auxiliary power supply device 20.

[0017] Figure 5 This is another example of the structure of a power supply device PS that is connected to an auxiliary power supply device 20.

[0018] Symbol Explanation

[0019] 1…Power supply system, 10…Power supply unit, 11…Power circuit section, 12…Control circuit section, 13…Switching circuit section, 20…Auxiliary power supply device, 21…Auxiliary power supply circuit section, 22…Secondary power supply circuit section, 111…AC / DC converter, 112…Switching circuit section, 113…Transformer, 114…Rectification and smoothing circuit section, 211…Charging and discharging circuit section, 212…Constant current circuit section, 213…Constant voltage circuit section, 214…Voltage determination circuit section, 215…Notification circuit Section, 221…DC / DC converter, CTR…control section, D1, D2, D3…diodes, DC…current detection circuit section, H…fuse, HS…fuse section, HS1…first fuse section, HS2…second fuse section, LD…load, MD…medical device, P…power supply, PS…power supply unit, R1, R2…resistors, RF…rectifier circuit section, RS…rectifier smoothing circuit section, SC…smoothing capacitor, SM…smoothing circuit section, SW…switching circuit section, TR…transformer Detailed Implementation

[0020] <Implementation Method>

[0021] Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. In these embodiments, the conductor that transmits an electrical signal corresponding to DC power or an electrical signal corresponding to AC power will be referred to as the transmission path. The transmission path may be, for example, a conductor printed on a substrate, a wire formed as a line, or other conductors. Furthermore, in these embodiments, the term "voltage" refers to the potential difference from a predetermined reference potential; illustrations and explanations regarding the reference potential are omitted. Here, the reference potential can be any potential. In these embodiments, as an example, the case where the reference potential is a ground potential will be described. Furthermore, in these embodiments, for ease of explanation, the state in which the collector terminal and emitter terminal of a phototransistor are energized will be described as the "on state." Furthermore, in these embodiments, for ease of explanation, the state in which the collector terminal and emitter terminal of a phototransistor are not energized will be described as the "off state."

[0022] <Structure of Power Supply System>

[0023] The following is for reference Figure 1 The structure of the power supply system 1 involved in the implementation method will be described. Figure 1 This is a diagram illustrating an example of the structure of the power supply system 1 involved in the implementation method.

[0024] Power supply system 1 supplies a predetermined voltage to load LD based on the voltage supplied from an external power source P. Furthermore, in... Figure 1 In order to simplify the attached diagram, the power supply P has been omitted.

[0025] The following description, as an example, illustrates the case where the power source P is a commercial power source that supplies AC voltage to the power supply unit 10. Additionally, the following description, as an example, illustrates the case where the power supply system 1 supplies DC voltage to the load LD. Furthermore, the power source P can also be any other power source that supplies AC voltage to the power supply unit 10 instead of the commercial power source. Similarly, the power supply system 1 can also be a structure that supplies AC voltage to the load LD instead of a structure that supplies DC voltage to the load LD.

[0026] The load LD can be any device that receives DC power from the power supply system 1. For example, the load LD can be a motor, a battery, etc.

[0027] The power supply system 1 includes a power supply device 10, an auxiliary power supply device 20, a resistive element R1, a diode D1, and a diode D2. Furthermore, the power supply system 1 may also include other circuit elements, other circuits, other devices, and other components. Alternatively, the power supply system 1 may also be structured without some or all of the resistive element R1, diode D1, and diode D2. Figure 1 In the example shown, in the power supply system 1, the power supply unit 10, the auxiliary power supply unit 20, the resistive element R1, the diode D1, and the diode D2 are configured separately. However, in the power supply system 1, some or all of the power supply unit 10, the auxiliary power supply unit 20, the resistive element R1, the diode D1, and the diode D2 can also be configured as an integral unit. Furthermore, in addition to the power supply unit 10, the auxiliary power supply unit 20, the resistive element R1, the diode D1, and the diode D2, the power supply system 1 can also have a structure that includes a load LD. In this case, the load LD can also be integrally configured with some or all of the power supply unit 10, the auxiliary power supply unit 20, the resistive element R1, the diode D1, and the diode D2.

[0028] First, an example of the connection method of the power supply device 10, auxiliary power supply device 20, load LD, resistor R1, diode D1, and diode D2 in the power supply system 1 will be explained.

[0029] The power supply device 10 has eight terminals: power terminal 10I11, power terminal 10I12, input terminal 10I21, input terminal 10I22, output terminal 10O11, output terminal 10O12, output terminal 10O21, and output terminal 10O22. In addition to these eight terminals, the power supply device 10 may also have other types of terminals.

[0030] The auxiliary power supply device 20 has six terminals: power supply terminal 20I11, power supply terminal 20I12, input terminal 20I21, input terminal 20I22, output terminal 20O11, and output terminal 20O12. In addition to these six terminals, the auxiliary power supply device 20 may also have other terminals.

[0031] The load LD has two power supply terminals, LDI1 and LDI2. In addition, the load LD may also have other terminals besides these two.

[0032] The power terminal 10I11 of the power supply device 10 is a terminal connected to one of the two output terminals of the power supply P via a transmission path. In addition, the structure between the power terminal 10I11 and the power supply P may be configured with other circuit elements, other circuits, other devices, other components, etc., as long as it does not impair the function of the power supply system 1.

[0033] The power terminal 10I12 of the power supply device 10 is a terminal connected to the other of the two output terminals of the power supply P via a transmission path. In addition, the structure between the power terminal 10I12 and the power supply P may be configured with other circuit elements, other circuits, other devices, other components, etc., as long as it does not impair the function of the power supply system 1.

[0034] The output terminal 10O11 of the power supply device 10 is connected to the power terminal LDI1 of the load LD via a transmission path. In addition, other circuit elements, other circuits, other devices, other components, etc. may be installed between the output terminal 10O11 and the power terminal LDI1, as long as the function of the power supply system 1 is not impaired.

[0035] The transmission path connecting the output terminal 10O11 of the power supply device 10 to the power supply terminal LDI1 of the load LD is connected to the anode of the diode D1 via another transmission path. Furthermore, between the transmission path connecting the output terminal 10O11 and the power supply terminal LDI1 and the diode D1, other circuit elements, other circuits, other devices, other components, etc., may be provided, as long as the function of the power supply system 1 is not impaired.

[0036] The cathode of diode D1 is connected to the input terminal 10I21 of the power supply device 10 and the cathode of diode D2 via a transmission path, respectively. Furthermore, between diode D1 and the input terminal 10I21, other circuit elements, circuits, devices, or components may be installed, provided that the function of the power supply system 1 is not impaired. Similarly, between diodes D1 and D2, other circuit elements, circuits, devices, or components may be installed, provided that the function of the power supply system 1 is not impaired.

[0037] The anode of diode D2 is connected via a transmission path to one of the two terminals of resistor R1 and the output terminal 20O11 of auxiliary power supply device 20, respectively. Furthermore, between diode D2 and resistor R1, other circuit elements, circuits, devices, or components may be provided, provided it does not impair the function of power supply system 1. Additionally, between diode D2 and output terminal 20O11, other circuit elements, circuits, devices, or components may be provided, provided it does not impair the function of power supply system 1.

[0038] The other of the two terminals of the resistor R1 is connected to the input terminal 20I21 of the auxiliary power supply device 20 via a transmission path. Furthermore, between the resistor R1 and the input terminal 20I21, other circuit elements, circuits, devices, components, etc., may be installed, provided that the function of the power supply system 1 is not impaired.

[0039] The output terminal 10O12 of the power supply device 10 is connected to the power terminal LDI2 of the load LD via a transmission path. In addition, other circuit elements, other circuits, other devices, other components, etc. may be installed between the output terminal 10O12 and the power terminal LDI2, as long as the function of the power supply system 1 is not impaired.

[0040] The transmission path connecting the output terminal 11O12 of the power supply device 10 to the power terminal LDI2 of the load LD is connected to the input terminal 10I22 of the power supply device 10, the input terminal 20I22 of the auxiliary power supply device 20, and the output terminal 20O12 of the auxiliary power supply device 20 via other transmission paths. Furthermore, between the transmission path connecting the output terminal 11O12 and the power terminal LDI2 and the input terminal 10I22, other circuit elements, other circuits, other devices, other components, etc., may be installed, provided that the function of the power supply system 1 is not impaired. Similarly, between the transmission path connecting the output terminal 11O12 and the power terminal LDI2 and the input terminal 20I22, other circuit elements, other circuits, other devices, other components, etc., may be installed, provided that the function of the power supply system 1 is not impaired.

[0041] The output terminal 10O21 of the power supply device 10 is connected to the power terminal 20I11 of the auxiliary power supply device 20 via a transmission path. In addition, other circuit elements, other circuits, other devices, other components, etc. may be installed between the output terminal 10O21 and the power terminal 20I11, as long as the function of the power supply system 1 is not impaired.

[0042] The output terminal 10O22 of the power supply device 10 is connected to the power terminal 20I12 of the auxiliary power supply device 20 via a transmission path. In addition, other circuit elements, other circuits, other devices, other components, etc. may be installed between the output terminal 10O22 and the power terminal 20I12, as long as the function of the power supply system 1 is not impaired.

[0043] Next, the structure of the power supply device 10 will be described.

[0044] The power supply device 10 includes a power circuit section 11, a control circuit section 12, and a switching circuit section 13. In addition to these three circuit sections, the power supply device 10 may also have other circuit elements, other circuits, other devices, other components, etc.

[0045] The power supply circuit section 11 has seven terminals: power supply terminal 11I11, power supply terminal 11I12, input terminal 11I2, output terminal 11O11, output terminal 11O12, output terminal 11O21, and output terminal 11O22. In addition to these seven terminals, the power supply circuit section 11 may also have other terminals.

[0046] The control circuit section 12 has two terminals: an input terminal 12I and an output terminal 12O. Alternatively, the control circuit section 12 may have other terminals besides these two.

[0047] The switching circuit section 13 has three terminals: input terminal 13I11, input terminal 13I12, and output terminal 13O. Alternatively, the switching circuit section 13 may have other terminals besides these three.

[0048] The power supply terminal 11I11 of the power supply circuit section 11 is connected to the power supply terminal 10I11 of the power supply device 10 via a transmission path. In addition, other circuit elements, other circuits, other devices, other components, etc. may be installed between the power supply terminal 11I11 and the power supply terminal 10I11, as long as the function of the power supply system 1 is not impaired.

[0049] The power supply terminal 11I12 of the power supply circuit section 11 is connected to the power supply terminal 10I12 of the power supply device 10 via a transmission path. In addition, other circuit elements, other circuits, other devices, other components, etc. may be installed between the power supply terminal 11I12 and the power supply terminal 10I12, as long as the function of the power supply system 1 is not impaired.

[0050] The output terminal 11O11 of the power supply circuit section 11 is connected to the output terminal 10O11 of the power supply device 10 via a transmission path. In addition, other circuit elements, other circuits, other devices, other components, etc. may be installed between the output terminal 11O11 and the output terminal 10O11, as long as the function of the power supply system 1 is not impaired.

[0051] The output terminal 11O12 of the power supply circuit section 11 is connected to the output terminal 10O12 of the power supply device 10 via a transmission path. In addition, other circuit elements, other circuits, other devices, other components, etc. may be installed between the output terminal 11O12 and the output terminal 10O12, as long as the function of the power supply system 1 is not impaired.

[0052] The output terminal 11O21 of the power supply circuit section 11 is connected to the output terminal 10O21 of the power supply device 10 via a transmission path. Furthermore, between the output terminal 11O21 and the output terminal 10O21, other circuit elements, other circuits, other devices, other components, etc., may be installed, as long as the function of the power supply system 1 is not impaired.

[0053] The output terminal 11O22 of the power supply circuit section 11 is connected to the output terminal 10O22 of the power supply device 10 via a transmission path. In addition, other circuit elements, other circuits, other devices, other components, etc. may be installed between the output terminal 11O22 and the output terminal 10O22, as long as the function of the power supply system 1 is not impaired.

[0054] The input terminal 11I2 of the power supply circuit section 11 is connected to the output terminal 12O of the control circuit section 12 via a transmission path. Furthermore, between the input terminal 11I2 and the output terminal 12O, other circuit elements, other circuits, other devices, other components, etc., may be installed, as long as the function of the power supply system 1 is not impaired.

[0055] The input terminal 12I of the control circuit section 12 is connected to the output terminal 13O of the switching circuit section 13 via a transmission path. Furthermore, between the input terminal 12I and the output terminal 13O, other circuit elements, other circuits, other devices, other components, etc., may be installed, as long as the function of the power supply system 1 is not impaired.

[0056] The input terminal 13I11 of the switching circuit section 13 is connected to the input terminal 10I21 of the power supply device 10 via a transmission path. Furthermore, between the input terminal 13I11 and the input terminal 10I21, other circuit elements, other circuits, other devices, other components, etc., may be installed, as long as the function of the power supply system 1 is not impaired.

[0057] The input terminal 13I12 of the switching circuit section 13 is connected to the input terminal 10I22 of the power supply device 10 via a transmission path. Furthermore, between the input terminal 13I12 and the input terminal 10I22, other circuit elements, other circuits, other devices, other components, etc., may be installed, as long as the function of the power supply system 1 is not impaired.

[0058] Next, the structure of the power supply circuit section 11 will be described.

[0059] The power supply circuit section 11 can be any structure as long as it is capable of converting the AC voltage supplied from the power supply P into a DC voltage and outputting the converted DC voltage. Hereinafter, as an example... Figure 1 As shown, the power supply circuit section 11 will be described with an AC (Alternating Current) / DC (Direct Current) converter 111, a switching circuit section 112, a transformer 113, and a rectification and smoothing circuit section 114. Furthermore, when the power supply circuit section 11 receives a DC voltage from the power supply P, a DC / DC converter is provided instead of the AC / DC converter 111. That is, the power supply circuit section 11 includes a converter that converts the voltage supplied from the power supply P into a DC voltage. An example of such a converter is the AC / DC converter 111.

[0060] One of the two power terminals of the AC / DC converter 111 is connected to the power terminal 11I11 of the power circuit section 11 via a transmission path. Furthermore, between the AC / DC converter 111 and the power terminal 11I11, other circuit elements, other circuits, other devices, other components, etc., may be installed, as long as the function of the power supply system 1 is not impaired.

[0061] Furthermore, the other of the two power terminals of the AC / DC converter 111 is connected to the power terminal 11I12 of the power circuit section 11 via a transmission path. In addition, other circuit elements, other circuits, other devices, other components, etc., may be installed between the AC / DC converter 111 and the power terminal 11I12, as long as the function of the power supply system 1 is not impaired.

[0062] Furthermore, the high-potential output terminal of the two output terminals of the AC / DC converter 111 is connected via a transmission path to the high-potential power terminal of the two power supply terminals of the switching circuit section 112 and the output terminal 11O21 of the power supply circuit section 11, respectively. Moreover, between this output terminal and the power supply terminal, other circuit elements, other circuits, other devices, other components, etc., may be provided, as long as the function of the power supply system 1 is not impaired. Additionally, between the AC / DC converter 111 and the output terminal 11O21, other circuit elements, other circuits, other devices, other components, etc., may be provided, as long as the function of the power supply system 1 is not impaired.

[0063] Furthermore, the low-potential output terminal of the two output terminals of the AC / DC converter 111 is connected via a transmission path to the low-potential power terminal of the two power supply terminals of the switching circuit section 112 and the output terminal 11O22 of the power supply circuit section 11, respectively. Moreover, between this output terminal and the power supply terminal, other circuit elements, other circuits, other devices, other components, etc., may be provided, as long as the function of the power supply system 1 is not impaired. Additionally, between the AC / DC converter 111 and the output terminal 11O22, other circuit elements, other circuits, other devices, other components, etc., may be provided, as long as the function of the power supply system 1 is not impaired.

[0064] That is, the input side of the AC / DC converter 111 is connected to the power supply P via these power terminals. As a result, AC voltage is supplied from the power supply P to the AC / DC converter 111. The AC / DC converter 111 converts the AC voltage supplied from the power supply P into DC voltage. The AC / DC converter 111 supplies the converted DC voltage to the switching circuit section 112 and applies it between the output terminals 10O21 and 10O22. In other words, the AC / DC converter 111 supplies the converted DC voltage to both the switching circuit section 112 and the auxiliary power supply device 20.

[0065] The AC / DC converter 111 can be configured as a combination of a PFC (Power Factor Correction) circuit and a DC / DC converter, or as a combination of a rectifier circuit and a DC / DC converter, or as other circuits. Hereinafter, as an example, the AC / DC converter 111 will be described with a smoothing capacitor along with the rectifier circuit. For ease of explanation, this smoothing capacitor will be referred to as the first smoothing capacitor.

[0066] One of the two output terminals of the switching circuit section 112 is connected to one of the two terminals of the primary winding of the transformer 113 via a transmission path. The other of the two output terminals of the switching circuit section 112 is connected to the other of the two terminals of the primary winding of the transformer 113 via a transmission path. Furthermore, other circuit elements, other circuits, other devices, other components, etc., can be installed between the switching circuit section 112 and the primary winding of the transformer 113, provided that the function of the power supply system 1 is not impaired.

[0067] The switching circuit section 112 converts the DC voltage generated by the AC / DC converter 111 into an AC voltage corresponding to the control of the control circuit section 12. The switching circuit section 112 supplies the converted AC voltage to the winding on the primary side of the transformer 113.

[0068] The switching circuit section 112, for example, the switching element (e.g., field-effect transistor, bipolar transistor, etc.) is a bridge-connected switching circuit (e.g., full-bridge circuit, half-bridge circuit, etc.).

[0069] One of the terminals of the secondary winding of transformer 113 is connected via a transmission path to the high-potential power terminal of the two power terminals of rectifier smoothing circuit section 114. Furthermore, the structure between the secondary winding of transformer 113 and this power terminal may include other circuit elements, other circuits, other devices, other components, etc., as long as it does not impair the function of the power supply system 1.

[0070] The other terminal of the secondary winding of transformer 113 is connected via a transmission path to the low-potential power terminal of the two power terminals of rectifier smoothing circuit section 114. Furthermore, other circuit elements, circuits, devices, or components may be installed between the secondary winding of transformer 113 and this power terminal, provided that the function of the power supply system 1 is not impaired.

[0071] Based on the law of electromagnetic induction, transformer 113 transmits the AC voltage supplied from the switching circuit section 112 from the primary winding of transformer 113 to the secondary winding of transformer 113. The secondary winding of transformer 113 then provides the transmitted AC voltage to the rectifier and smoothing circuit section 114.

[0072] The high-potential output terminal of the two output terminals of the rectifier smoothing circuit section 114 is connected to the output terminal 11O11 of the power supply circuit section 11 via a transmission path. Furthermore, between these output terminals, other circuit elements, other circuits, other devices, other components, etc., may be provided, as long as the function of the power supply system 1 is not impaired.

[0073] The low-potential output terminal of the two output terminals of the rectifier smoothing circuit section 114 is connected to the output terminal 11O12 of the power supply circuit section 11 via a transmission path. Furthermore, between this output terminal and the output terminal 11O12, other circuit elements, other circuits, other devices, other components, etc., may be installed, as long as the function of the power supply system 1 is not impaired.

[0074] The rectification and smoothing circuit 114 converts the AC voltage supplied from the secondary winding of the transformer 113 into a DC voltage. The rectification and smoothing circuit 114 applies the converted DC voltage to the output terminals 10O11 and 10O12 of the power supply unit 10 via output terminals 11O11 and 11O12. In other words, the rectification and smoothing circuit 114 supplies the converted DC voltage to the load LD and the switching circuit 13, respectively.

[0075] The rectifier smoothing circuit section 114 is composed, for example, a rectifier diode (not shown) and a smoothing capacitor (not shown).

[0076] Next, the structure of the control circuit section 12 will be explained.

[0077] The control circuit section 12 controls the power supply circuit section 11. More specifically, the control circuit section 12 controls the switching circuit section 112 included in the power supply circuit section 11 to switch each of the switching elements included in the switching circuit section 112.

[0078] The control circuit section 12 becomes enabled when an enable signal is output from the switching circuit section 13. When the control circuit section 12 is enabled, it controls the power supply circuit section 11. On the other hand, when no enable signal is output from the switching circuit section 13, the control circuit section 12 becomes disabled. When the control circuit section 12 is disabled, it does not control the power supply circuit section 11.

[0079] Next, the structure of the switching circuit section 13 will be explained.

[0080] When the switching circuit unit 13 supplies a DC voltage of a predetermined magnitude or greater from at least one of the power supply circuit unit 11 and the auxiliary power supply device 20 via input terminals 13I11 and 13I12, it outputs an enable signal to the control circuit unit 12. That is, the switching circuit unit 13 causes the control circuit unit 12 to switch between enabling and disabling the control circuit unit 12 depending on whether an enable signal is output. Furthermore, the switching circuit unit 13 may also be referred to as a remote control unit. The predetermined magnitude is, for example, the magnitude of the voltage output from the auxiliary power supply device 20, but is not limited to this.

[0081] Next, the structure of the auxiliary power supply device 20 will be described.

[0082] The auxiliary power supply device 20 includes an auxiliary power supply circuit section 21 and an auxiliary power supply circuit section 22. In addition to these two circuit sections, the auxiliary power supply device 20 may also have other circuit elements, other circuits, other devices, other components, etc.

[0083] The auxiliary power supply circuit section 21 has four terminals: power supply terminal 21I11, power supply terminal 21I12, input terminal 21I21, and input terminal 21I22. In addition to these four terminals, the auxiliary power supply circuit section 21 may also have other terminals.

[0084] The auxiliary power supply circuit section 22 has four terminals: power supply terminal 22I11, power supply terminal 22I12, output terminal 22O11, and output terminal 22O12. In addition to these four terminals, the auxiliary power supply circuit section 22 may also have other terminals.

[0085] The power supply terminal 21I11 of the auxiliary power supply circuit section 21 is connected via a transmission path to the power supply terminal 20I11 of the auxiliary power supply device 20 and the power supply terminal 22I11 of the auxiliary power supply circuit section 22, respectively. Furthermore, between the power supply terminals 21I11 and 20I11, other circuit elements, circuits, devices, or components may be installed, provided that the function of the power supply system 1 is not impaired. Similarly, between the power supply terminals 21I11 and 22I11, other circuit elements, circuits, devices, or components may be installed, provided that the function of the power supply system 1 is not impaired.

[0086] The power supply terminal 21I12 of the auxiliary power supply circuit section 21 is connected via a transmission path to the power supply terminal 20I12 of the auxiliary power supply device 20 and the power supply terminal 22I12 of the auxiliary power supply circuit section 22, respectively. Furthermore, between the power supply terminals 21I12 and 20I12, other circuit elements, circuits, devices, or components may be installed, provided that the function of the power supply system 1 is not impaired.

[0087] The input terminal 21I21 of the auxiliary power supply circuit section 21 is connected to the input terminal 20I21 of the auxiliary power supply device 20 via a transmission path. Furthermore, between the input terminal 21I21 and the input terminal 20I21, other circuit elements, other circuits, other devices, other components, etc., may be installed, as long as the function of the power supply system 1 is not impaired.

[0088] The input terminal 21I22 of the auxiliary power supply circuit section 21 is connected to the input terminal 20I22 of the auxiliary power supply device 20 via a transmission path. Furthermore, between the input terminal 21I22 and the input terminal 20I22, other circuit elements, other circuits, other devices, other components, etc., may be installed, as long as the function of the power supply system 1 is not impaired.

[0089] The output terminal 22O11 of the auxiliary power supply circuit section 22 is connected to the output terminal 20O11 of the auxiliary power supply device 20 via a transmission path. Furthermore, between the output terminal 22O11 and the output terminal 20O11, other circuit elements, other circuits, other devices, other components, etc., may be installed, as long as the function of the power supply system 1 is not impaired.

[0090] The output terminal 22O12 of the auxiliary power supply circuit section 22 is connected to the output terminal 20O12 of the auxiliary power supply device 20 via a transmission path. Furthermore, between the output terminal 22O12 and the output terminal 20O12, other circuit elements, other circuits, other devices, other components, etc., may be installed, as long as the function of the power supply system 1 is not impaired.

[0091] Next, the structure of the auxiliary power supply circuit section 21 will be described.

[0092] The auxiliary power supply circuit 21 supplies power to the power supply device 10 when the power supply to the power supply device 10 is cut off. The auxiliary power supply circuit 21 can be any structure as long as it can supply power to the power supply device 10 when the power supply to the power supply device 10 is cut off. Hereinafter, as an example, Figure 1 As shown, the auxiliary power supply circuit section 21 includes a fuse H, a resistor R2, a diode D3, a charging / discharging circuit section 211, a constant current circuit section 212, a constant voltage circuit section 213, a voltage determination circuit section 214, and a notification circuit section 215.

[0093] One of the two terminals of the fuse H is connected to the power supply terminal 21I11 of the auxiliary power supply circuit section 21 via a transmission path. Furthermore, between the fuse H and the power supply terminal 21I11, other circuit elements, other circuits, other devices, other components, etc., may be installed, as long as the function of the power supply system 1 is not impaired.

[0094] The other of the two terminals of fuse H is connected via a transmission path to one of the two terminals of resistor R2 and the cathode of diode D3, respectively. Furthermore, between fuse H and resistor R2, other circuit elements, circuits, devices, or components may be installed, provided it does not impair the function of power supply system 1. Similarly, between resistor R2 and the cathode of diode D3, other circuit elements, circuits, devices, or components may be installed, provided it does not impair the function of power supply system 1.

[0095] The other of the two terminals of the resistor R2 is connected via a transmission path to the anode of the diode D3 and the high-potential power terminal of the two power terminals of the charging / discharging circuit section 211, respectively. Furthermore, between the resistor R2 and the anode of the diode D3, other circuit elements, circuits, devices, or components may be provided, provided that the function of the power supply system 1 is not impaired. Similarly, between the resistor R2 and the charging / discharging circuit section 211, other circuit elements, circuits, devices, or components may be provided, provided that the function of the power supply system 1 is not impaired. Furthermore, between the diode D3 and the charging / discharging circuit section 211, other circuit elements, circuits, devices, or components may be provided, provided that the function of the power supply system 1 is not impaired.

[0096] Thus, the resistor R2 is connected in parallel with the diode D3 between the power supply terminal 20I11 of the auxiliary power supply device 20 and the charging / discharging circuit section 211. Furthermore, the direction of current flowing through the diode D3 is from the charging / discharging circuit section 211 toward the power supply terminal 20I11.

[0097] Alternatively, the resistor R2 can be connected in parallel with the diode D3 between the power supply terminal 20I12 of the auxiliary power supply device 20 and the charging / discharging circuit section 211. In this case, one of the two terminals of the fuse H is connected to the power supply terminal 21I11 of the auxiliary power supply circuit section 21 via a transmission path. The other of the two terminals of the fuse H is connected to the high-potential power terminal of the two power supply terminals of the charging / discharging circuit section 211 via a transmission path. Furthermore, one of the two terminals of the resistor R2 is connected to the power supply terminal 21I12 of the auxiliary power supply circuit section 21 and the anode of the diode D3 via a transmission path. The other of the two terminals of the resistor R2 is connected to the cathode of the diode D3 and the low-potential power terminal of the two power supply terminals of the charging / discharging circuit section 211 via a transmission path. Moreover, the direction of current flowing through the diode D3 is from the charging / discharging circuit section 211 towards the power supply terminal 20I11. Here, between the fuse H and the power supply terminal 21I11, other circuit elements, circuits, devices, or components can be installed, provided that the function of the power supply system 1 is not impaired. Similarly, between the fuse H and the high-potential power terminal of the two power terminals of the charging / discharging circuit section 211, other circuit elements, circuits, devices, or components can be installed, provided that the function of the power supply system 1 is not impaired. Furthermore, between the power supply terminal 21I12 and the resistor R2, other circuit elements, circuits, devices, or components can be installed, provided that the function of the power supply system 1 is not impaired. Similarly, between the resistor R2 and the cathode of the diode D3, other circuit elements, circuits, devices, or components can be installed, provided that the function of the power supply system 1 is not impaired. Finally, between the power supply terminal 21I12 and the anode of the diode D3, other circuit elements, circuits, devices, or components can be installed, provided that the function of the power supply system 1 is not impaired. Furthermore, between the resistor R2 and the cathode of the diode D3, other circuit elements, circuits, devices, or components may be installed, provided that the function of the power supply system 1 is not impaired. Similarly, between the resistor R2 and the low-potential power terminal of the two power terminals of the charging / discharging circuit section 211, other circuit elements, circuits, devices, or components may be installed, provided that the function of the power supply system 1 is not impaired. Likewise, between the cathode of the diode D3 and the low-potential power terminal of the two power terminals of the charging / discharging circuit section 211, other circuit elements, circuits, devices, or components may be installed, provided that the function of the power supply system 1 is not impaired.

[0098] The low-potential power terminal of the two power terminals of the charging / discharging circuit section 211 is connected to the power terminal 21I12 of the auxiliary power supply circuit section 21 via a transmission path. Furthermore, the structure between the charging / discharging circuit section 211 and the power terminal 21I12 may be configured with other circuit elements, other circuits, other devices, other components, etc., as long as it does not impair the function of the power supply system 1.

[0099] The high-potential output terminal of the two output terminals of the charging / discharging circuit section 211 is connected to the high-potential power terminal of the two power supply terminals of the constant current circuit section 212 via a transmission path. Furthermore, between the output terminal and the power supply terminal, other circuit elements, other circuits, other devices, other components, etc., may be provided, as long as the function of the power supply system 1 is not impaired.

[0100] The low-potential output terminal of the two output terminals of the charging / discharging circuit section 211 is connected to the low-potential power terminal of the two power supply terminals of the constant current circuit section 212 via a transmission path. Furthermore, between the output terminal and the power supply terminal, other circuit elements, other circuits, other devices, other components, etc., may be provided, as long as the function of the power supply system 1 is not impaired.

[0101] like Figure 1As shown, the charging / discharging circuit section 211 includes a capacitor that is charged by supplying AC power from the power source P to the power supply device 10, and discharges a discharge current according to the discharge of the first smoothing capacitor of the AC / DC converter 111. Hereinafter, for ease of explanation, this capacitor will be referred to as the first capacitor. One of the two terminals of the first capacitor is connected via a transmission path to the high-potential power terminal of the two power supply terminals of the charging / discharging circuit section 211 and the high-potential output terminal of the two output terminals of the charging / discharging circuit section 211, respectively. The other terminal of the first capacitor is connected via a transmission path to the low-potential power terminal of the two power supply terminals of the charging / discharging circuit section 211 and the low-potential output terminal of the two output terminals of the charging / discharging circuit section 211, respectively. Therefore, the direction of current flowing through the diode D3 can be described in other words as from the high-potential side of the first capacitor toward the power supply terminal 20I11. Furthermore, when the resistor R2 and diode D3 are connected in parallel between the power supply terminal 21I12 of the auxiliary power supply circuit section 21 and the low-potential side of the two power supply terminals of the charging and discharging circuit section 211, the direction of current flowing through diode D3 can be described as from the high-potential side of the first capacitor toward the power supply terminal 20I11. Here, other circuit elements, other circuits, other devices, other components, etc., can be installed between the first capacitor and each of the four terminals of the charging and discharging circuit section 211, as long as the function of the power supply system 1 is not impaired.

[0102] Here, in the event of a power outage or similar situation, the power supply from the power source P to the power supply device 10 is cut off to the first smoothing capacitor, thus initiating discharge. That is, the first capacitor in the charge / discharge circuit section 211 discharges with a discharge current in this condition. In other words, the first capacitor... Figure 1As shown, when one of the two terminals of the first smoothing capacitor is connected to the power supply terminal 20I11 and the other of the two terminals of the first smoothing capacitor is connected to the power supply terminal 20I12, a discharge current is generated based on the discharge of the first smoothing capacitor. This discharge current flows to the power supply device 10, whose power supply from the power source P is cut off, and the constant current circuit section 212, respectively. Therefore, in this case, the power supply device 10, whose power supply from the power source P is cut off, can be driven based on the discharge current from the first capacitor until the charging voltage of the first capacitor becomes lower than a predetermined voltage, continuing to supply DC voltage to the load LD. In other words, when the power supply from the power source P to the power supply device 10 is cut off, the auxiliary power supply circuit section 21 can maintain the DC voltage supply from the power supply device 10 to the load LD until the charging voltage of the first capacitor is lower than a predetermined voltage by discharging based on the discharge current of the first capacitor. Furthermore, in this case, the charging voltage of the first capacitor is supplied to the constant current circuit section 212.

[0103] On the other hand, when power is supplied from power source P to power supply device 10, the first capacitor of the charge / discharge circuit section 211 is charged. In other words, when the power supply from power source P to power supply device 10 is not interrupted, the first capacitor is charged by the DC voltage supplied from AC / DC converter 111. In addition, in this case, the DC voltage supplied from AC / DC converter 111 is also supplied to constant current circuit section 212.

[0104] The constant current circuit section 212 outputs a predetermined current to the constant voltage circuit section 213 based on the DC voltage supplied from the first smoothing capacitor or the first capacitor of the charge / discharge circuit section 211. The constant current circuit section 212 can be any structure as long as it is capable of outputting a predetermined current to the constant voltage circuit section 213 based on the DC voltage. Furthermore, the connection method between the constant current circuit section 212 and the constant voltage circuit section 213 can be any connection method. Additionally, other circuit elements, other circuits, other devices, other components, etc., can be installed between the constant current circuit section 212 and the constant voltage circuit section 213, as long as it does not impair the function of the power supply system 1.

[0105] The constant voltage circuit section 213 outputs a predetermined voltage to the voltage determination circuit section 214 based on the current output from the constant current circuit section 212. The constant voltage circuit section 213 can be any structure as long as it can output the voltage as a reference voltage to the voltage determination circuit section 214 based on the current. Furthermore, the connection method between the constant voltage circuit section 213 and the voltage determination circuit section 214 can also be arbitrary. Additionally, other circuit elements, other circuits, other devices, other components, etc., can be installed between the constant voltage circuit section 213 and the voltage determination circuit section 214, as long as it does not impair the function of the power supply system 1.

[0106] The voltage determination circuit 214 compares a reference voltage generated based on the voltage output from the constant voltage circuit 213 with a detection voltage generated based on the charging voltage of the first capacitor in the charge / discharge circuit 211. More specifically, the voltage determination circuit 214 determines whether the detection voltage is lower than the reference voltage. Therefore, the voltage determination circuit 214 is connected to the output terminal on the high-potential side of the charge / discharge circuit 211 via a transmission path. Thus, the voltage determination circuit 214 can detect the detection voltage generated based on the charging voltage of the first capacitor. Furthermore, the method for generating the detection voltage based on the charging voltage of the first capacitor can be arbitrary. For example, the charging voltage of the first capacitor can be divided by a resistive element connected to the transmission path between the output terminal on the high-potential side of the charge / discharge circuit 211 and the voltage determination circuit 214, thereby converting it into a detection voltage. Additionally, the method for generating the reference voltage based on the voltage output from the constant voltage circuit 213 can be arbitrary. For example, the voltage output from the constant voltage circuit section 213 is divided by a resistor connected in the transmission path connecting the constant voltage circuit section 213 and the voltage determination circuit section 214, thereby converting it into a reference voltage. Here, this reference voltage is, for example, the lowest voltage among the voltages that can drive the power supply device 10 when the power supply from the power source P is cut off. Alternatively, this reference voltage may be a voltage higher than the lowest voltage among the voltages that can drive the power supply device 10 when the power supply from the power source P is cut off.

[0107] Furthermore, the voltage determination circuit 214 can also be a structure that compares a reference voltage generated based on the voltage output from the constant voltage circuit 213 with a detection voltage generated based on the charging voltage of the first smoothing capacitor in the power supply circuit 11. More specifically, the voltage determination circuit 214 can also be a structure that determines whether the detection voltage is lower than the reference voltage. In this case, the voltage determination circuit 214 is connected via a transmission path to a transmission path that electrically connects the cathode of the diode whose anode is connected to the high-potential side of the power supply terminal of the charge / discharge circuit 211 to the power supply terminal 21I11. Thus, the voltage determination circuit 214 can detect the detection voltage generated based on the charging voltage of the first smoothing capacitor. Furthermore, the method for generating the detection voltage based on the charging voltage of the first smoothing capacitor can be any method. For example, the charging voltage of the first smoothing capacitor can be divided by a resistive element connected in the transmission path connecting the transmission path and the voltage determination circuit 214, thereby converting it into a detection voltage.

[0108] The voltage determination circuit 214, when determining that the charging voltage of the first capacitor in the charging / discharging circuit 211 is above the reference voltage output from the constant voltage circuit 213, outputs a signal of level L to the notification circuit 215. Conversely, when determining that the charging voltage of the first capacitor is below the reference voltage output from the constant voltage circuit 213, the voltage determination circuit 214 outputs a signal of level H to the notification circuit 215. That is, the voltage determination circuit 214 outputting an L-level signal indicates that the output of DC voltage from the power supply device 10 has stopped. Conversely, the voltage determination circuit 214 outputting an H-level signal indicates that the output of DC voltage from the power supply device 10 has not stopped. Furthermore, the connection between the voltage determination circuit 214 and the notification circuit 215 can be arbitrary. Additionally, other circuit elements, other circuits, other devices, other components, etc., can be installed between the voltage determination circuit 214 and the notification circuit 215, as long as it does not impair the function of the power supply system 1.

[0109] The notification circuit unit 215 notifies the voltage determination circuit unit 214 of the determination result. Hereinafter, as an example, the notification circuit unit 215 is described as having a light-emitting diode (LED) and a phototransistor that switches between on and off states based on the LED's emission. In this case, the LED emits light when the voltage determination circuit unit 214 outputs an L-level signal, and turns off when the voltage determination circuit unit 214 outputs an H-level signal. That is, the LED's emission indicates that the power supply from power source P to power supply device 10 has not stopped. On the other hand, the LED's extinguishing indicates that the power supply from power source P to power supply device 10 has stopped. Here, the base terminal of the phototransistor receives light emitted from the LED. The collector terminal of the phototransistor is connected to the input terminal 21I21 of the auxiliary power supply device 20 via a transmission path. The emitter terminal of the phototransistor is connected to the input terminal 21I22 of the auxiliary power supply device 20 via a transmission path. That is, the phototransistor receives DC voltage from the power supply device 10 or the auxiliary power supply circuit 22, and outputs a signal through an open collector based on the presence or absence of light emission from the light-emitting diode. Therefore, the resistor R1 included in the power supply system 1 is used to limit the supply of excess power to the phototransistor. Furthermore, the output destination of this signal can be other circuits included in the auxiliary power supply device 20, or external circuits, external devices, etc. Figure 1 The output destination of this signal is omitted in the text.

[0110] Next, the structure of the auxiliary power supply circuit section 22 will be explained.

[0111] The auxiliary power supply circuit section 22 can be any structure as long as its input side is connected to the power supply unit 10, its output side is connected to the load LD, and it can supply output voltage to other circuit sections based on the power supplied from the power supply unit 10. Hereinafter, as an example, we will describe the case where the auxiliary power supply circuit section 22 includes an isolated DC / DC converter 221 with a transformer. Furthermore, the auxiliary power supply circuit section 22 can also be structured to include other circuit elements, other circuits, other devices, other components, etc., in addition to the DC / DC converter 221.

[0112] The high-potential power terminal of the two power terminals of the DC / DC converter 221 is connected to the power terminal 22I11 of the auxiliary power supply circuit section 22 via a transmission path. Furthermore, other circuit elements, other circuits, other devices, other components, etc., may be installed between these two power terminals, as long as the function of the power supply system 1 is not impaired.

[0113] The low-potential power terminal of the two power terminals of the DC / DC converter 221 is connected to the power terminal 22I12 of the auxiliary power supply circuit section 22 via a transmission path. Furthermore, other circuit elements, other circuits, other devices, other components, etc., may be installed between these two power terminals, as long as the function of the power supply system 1 is not impaired.

[0114] The high-potential output terminal of the two output terminals of the DC / DC converter 221 is connected to the output terminal 22O11 of the auxiliary power supply circuit section 22 via a transmission path. Furthermore, other circuit elements, other circuits, other devices, other components, etc., may be installed between these two output terminals, as long as the function of the power supply system 1 is not impaired.

[0115] The low-potential output terminal of the two output terminals of the DC / DC converter 221 is connected to the output terminal 22O12 of the auxiliary power supply circuit section 22 via a transmission path. Furthermore, other circuit elements, other circuits, other devices, other components, etc., may be installed between these two output terminals, as long as the function of the power supply system 1 is not impaired.

[0116] That is, the power supply unit 10 supplies the DC voltage converted by the AC / DC converter 111 of the power supply unit 10 to the DC / DC converter 221. Then, the DC / DC converter 221 converts the supplied DC voltage into a predetermined DC voltage and outputs the converted DC voltage as the output voltage to other circuit sections. Figure 1 In the example shown, the DC / DC converter 221 outputs its output voltage to the notification circuit section 215 of the auxiliary power supply circuit section 21 and the switching circuit section 13 of the power supply device 10, respectively. That is, the notification circuit section 215 and the switching circuit section 13 are examples of these other circuit sections.

[0117] Alternatively, a switching element can be connected between the switching circuit section 13 and the DC / DC converter 221. In this case, the user of the power supply system 1 can operate whether to enable the control circuit section 12 of the power supply device 10 via the switching element. This improves the convenience for the user of the power supply system 1.

[0118] With the above-described structure, the auxiliary power supply circuit section 21 and the secondary power supply circuit section 22 are integrally formed in the power supply system 1. Therefore, compared to the case where the auxiliary power supply circuit section 21 and the secondary power supply circuit section 22 are connected to the power supply device 10 as separate devices, the installation area of ​​the power supply system 1 can be reduced. In other words, the overall size of the power supply system 1 can be reduced. This means that compared to the case where the auxiliary power supply circuit section 21 and the secondary power supply circuit section 22 are separate, the overall size of the power supply system 1, where the auxiliary power supply device 20 includes both the auxiliary power supply circuit section 21 and the secondary power supply circuit section 22, can be reduced. Furthermore, this means that when the auxiliary power supply device 20 and the power supply device 10 are integrally formed, the size of the power supply device 10 can be reduced. Moreover, the reduction of the size of the power supply device 10 and the power supply system 1 is also related to the improvement of the versatility of the auxiliary power supply device 20, the power supply device 10, and the power supply system 1.

[0119] Furthermore, when the auxiliary power supply circuit section 21 and the secondary power supply circuit section 22 are integrally configured as in this embodiment, the components around the power supply terminals of each of the auxiliary power supply circuit section 21 and the secondary power supply circuit section 22 can be generalized. In particular, as Figure 1 As shown, when the auxiliary power supply circuit section 21 and the secondary power supply circuit section 22 are connected in parallel with respect to the power supply device 10, the number of components can be reduced by standardizing the components around the power supply terminals. This is desirable as it helps to suppress increases in manufacturing costs.

[0120] Furthermore, as in this embodiment, when the auxiliary power supply circuit section 21 and the secondary power supply circuit section 22 are integrally configured, even when the power supply to the power supply device 10 is cut off, the secondary power supply circuit section 22 can be driven by the DC voltage supplied from the charge / discharge circuit section 211 of the auxiliary power supply circuit section 21 during the period until the charging voltage of the first capacitor in the charge / discharge circuit section 211 is lower than a predetermined voltage. As in the past, when the auxiliary power supply circuit section 21 and the secondary power supply circuit section 22 are connected to the power supply device 10 as separate devices, the secondary power supply circuit section 22 cannot be driven when the power supply to the power supply device 10 is cut off. This is undesirable for protecting other circuits and other devices driven by the power supply from the secondary power supply circuit section 22. In other words, as in this embodiment, the integral configuration of the auxiliary power supply circuit section 21 and the secondary power supply circuit section 22 is desirable for protecting other circuits and other devices driven by the power supply from the secondary power supply circuit section 22.

[0121] also, Figure 1The connection method of the power supply system 1 shown can also be Figure 2 The connection method shown. Figure 2 This is a diagram showing another example of the structure of power supply system 1.

[0122] exist Figure 2 In the example shown, the switching circuit section 13 does not supply DC voltage from the power supply circuit section 11, and the notification circuit section 215 and the switching circuit section 13 respectively supply DC voltage from the auxiliary power supply circuit section 22. That is, in this example, the output terminal 10O11 of the power supply device 10 is connected to the power supply terminal LDI1 of the load LD through a transmission path. Furthermore, in this example, the output terminal 10O11 is not connected to the input terminal 10I21 of the power supply device 10, the resistive element R1, or the output terminal 20O11 of the auxiliary power supply device 20. Additionally, in this example, the output terminal 10O12 of the power supply device 10 is connected to the power supply terminal LDI2 of the load LD through a transmission path. Furthermore, in this example, the output terminal 10O12 is not connected to the input terminal 10I22 of the power supply device 10, the input terminal 20I22 of the auxiliary power supply device 20, or the output terminal 20O12. Therefore, in this example, the power supply system 1 does not include diodes D1 and D2.

[0123] Here, as Figure 1 and Figure 2 As shown in the example, when the power supply circuit section 11 of the power supply device 10 is of the insulated type (i.e., when the power supply device 10 has a transformer), power is supplied to the auxiliary power supply circuit section 22 from the primary side of the power supply circuit section 11. Therefore, in this case, the auxiliary power supply circuit section 22 is connected to both the primary and secondary sides of the power supply circuit section 11, and thus, as in this example, it is desirable to be of the insulated type (i.e., with a transformer). Furthermore, when the power supply circuit section 11 is of the non-insulated type, the auxiliary power supply circuit section 22 can be either non-insulated or insulated.

[0124] Other examples of power supply devices that are connected to auxiliary power supply devices.

[0125] Hereinafter, other examples of power supply devices that are connected to the aforementioned auxiliary power supply device 20 will be described.

[0126] Figure 3 This is a diagram showing an example of the structure of a power supply device PS connected to an auxiliary power supply device 20. Figure 3The power supply unit PS shown is a power supply unit connected to a medical device MD as a load. The medical device MD is a medical device that operates based on the DC voltage Vo output by the power supply unit PS, and includes, but is not limited to, treatment devices, diagnostic devices, and analytical devices. Treatment devices include, for example, low-frequency therapy devices and electrotherapy devices. Diagnostic devices include, for example, CT (Computed Tomography) and MRI (Magnetic Resonance Imaging). Analytical devices include, for example, electrotitration devices and X-ray diffraction devices.

[0127] The power supply unit PS has seven terminals: power terminal PS1, power terminal PS2, frame ground terminal PS3, output terminal PS4, output terminal PS5, connection terminal PS6, and connection terminal PS7. For example, a commercial power supply (e.g., the aforementioned power supply P) is connected to power terminals PS1 and PS2, supplying AC voltage Vx from the commercial power supply. Additionally, for example, the frame ground terminal PS3 is grounded. Furthermore, for example, the power terminals of the aforementioned medical device MD are connected to output terminals PS4 and PS5. That is, the power supply unit PS supplies DC voltage Vo to the power terminals of the medical device MD from output terminals PS4 and PS5. Additionally, for example, the auxiliary power supply unit 20 is connected to connection terminals PS6 and PS7. More specifically, the power terminal 20I11 of the auxiliary power supply unit 20 is connected to connection terminal PS6. On the other hand, the power terminal 20I12 of the auxiliary power supply unit 20 is connected to connection terminal PS7.

[0128] Here, Figure 3 The power supply device PS shown includes, for example, a fuse section HS, a rectifier and smoothing circuit section RS, a switching circuit section SW, a transformer TR, a rectifier circuit section RF, and a smoothing circuit section SM. Furthermore, the power supply device PS has an input transmission path L connected to the power supply terminal PS1 and an input transmission path N connected to the power supply terminal PS2.

[0129] The fuse section HS is provided in the power supply unit PS to meet medical standards required for the connection between the power supply unit PS and the medical device MD. The fuse section HS includes: a fuse installed on the input transmission path L between the power supply terminal PS1 and the rectifier smoothing circuit RS; and a fuse installed on the input transmission path N between the power supply terminal PS2 and the rectifier smoothing circuit RS. Alternatively, the power supply unit PS may be configured to have a circuit breaker instead of either or both of these fuses.

[0130] The rectifier-smoothing circuit RS generates a pulsating voltage, which is formed by rectifying the AC voltage Vx supplied from two transmission paths: the input transmission path L connected to the power supply terminal PS1 via the fuse section HS, and the input transmission path N connected to the power supply terminal PS2 via the fuse section HS. The generated pulsating voltage is smoothed to output a DC voltage Vin. Therefore, the rectifier-smoothing circuit RS includes a smoothing capacitor SC that supplies a voltage to smooth the rectified pulsating voltage. Here, one of the two terminals of the smoothing capacitor SC is connected to the input transmission path L. The other of the two terminals of the smoothing capacitor SC is connected to the input transmission path N. However, in… Figure 3 To avoid complicating the diagram, the transmission paths connecting the smoothing capacitor SC to the input transmission paths L and N are omitted. Thus, the rectifier smoothing circuit RS is connected to the fuse HS of the pre-stage of the rectifier smoothing circuit RS via the input transmission paths L and N. Furthermore, the rectifier smoothing circuit RS is connected to the connection terminal PS6 of the post-stage of the rectifier smoothing circuit RS via the input transmission path L. The rectifier smoothing circuit RS is connected to the connection terminal PS7 of the post-stage of the rectifier smoothing circuit RS via the input transmission path N. Therefore, the rectifier smoothing circuit RS applies the smoothed DC voltage Vin between the connection terminals PS6 and PS7. Additionally, the rectifier smoothing circuit RS may also include a power factor correction (PFC) circuit.

[0131] Furthermore, connection terminal PS6 is connected to one of the two input terminals of the switching circuit section SW via input transmission path L. Connection terminal PS7 is connected to the other of the two input terminals of the switching circuit section SW via input transmission path L. Therefore, the DC voltage Vin output from the rectifier-smoothing circuit section RS is supplied to the switching circuit section SW. The switching circuit section SW, for example, has multiple switching elements connected in a bridge configuration. Based on the DC voltage supplied from the rectifier-smoothing circuit section RS, it outputs an AC voltage generated by the operation of these multiple switching elements controlled by the control section CTR to the winding on the primary side of the transformer TR. Therefore, the switching circuit section SW is connected to one of the two terminals of this winding via input transmission path L, and to the other of the two terminals of this winding via input transmission path N.

[0132] The transformer TR is a transformer with reinforced insulation. The reason for the reinforced insulation of the transformer TR is to ensure that the power supply unit PS meets the aforementioned medical standards. Furthermore, the secondary winding of the transformer TR is connected to the rectifier circuit section RF via a transmission path, supplying AC voltage to the rectifier circuit section RF.

[0133] The rectifier circuit RF rectifies the AC voltage supplied from the transformer TR to generate a pulsating voltage, and supplies the generated pulsating voltage to the smoothing circuit SM via the transmission path.

[0134] The smoothing circuit section SM smooths the pulsating voltage supplied from the rectifier circuit section RF to generate a DC voltage, and applies the generated DC voltage Vo between the output terminal PS4 and the output terminal PS5.

[0135] The current detection circuit DC detects the current flowing in the input transmission path N, which connects the connection terminal PS7 and the switching circuit SW. Then, the current detection circuit DC outputs a signal corresponding to the magnitude of the detected current to the control unit CTR.

[0136] The control unit (CTR) is, for example, a microcomputer. Based on the signal obtained from the current detection circuit (DC), the control unit (CTR) controls the duty cycle of the switching circuit (SW) at its drive frequency (e.g., PWM control), thereby switching the switching elements. Furthermore, in Figure 3 In order to prevent the diagram from becoming too complex, the transmission path connecting the control unit CTR and the switching circuit unit SW has been omitted.

[0137] Thus, in the power supply unit PS connected to the medical device MD as a load, fuses (or circuit breakers) with fuse sections HS are respectively provided on the input transmission path L and the input transmission path N. Furthermore, the auxiliary power supply unit 20 according to the embodiment is connected to such a power supply unit PS, for example. In this case, the auxiliary power supply unit 20, the power supply unit PS, and the medical device MD each constitute a medical system. In this medical system, the power supply unit PS has fuse sections HS, and the transformer TR has reinforced insulation, thus enabling a structure that meets medical standards. Furthermore, since the medical system includes the auxiliary power supply unit 20, the output from the power supply unit PS can be maintained for a predetermined time even when the power supply to the power supply unit PS is cut off. Additionally, by suppressing the enlargement of the auxiliary power supply unit 20, the overall enlargement of the medical system can also be suppressed.

[0138] Furthermore, many medical device MDs have the function of charging a backup secondary battery with DC voltage Vo. Therefore, the power supply PS can also be a structure capable of detecting the generation of reverse current from the medical device MD and stopping operation upon detection of reverse current from the medical device MD.

[0139] Here, Figure 3 The power supply unit PS shown has an internal fuse section HS. However, as Figure 4 As shown, the power supply unit PS can also be structured with an external fuse unit HS. That is, the fuse unit HS is separate from the power supply unit PS, or it can be a structure connected between the power supply unit PS and a commercial power supply (not shown). In this case, the medical system includes an auxiliary power supply device 20, a power supply unit PS, a medical device MD, and a fuse unit HS. Figure 4 This is a diagram showing another example of the structure of the power supply device PS, which is connected to the auxiliary power supply device 20.

[0140] like Figure 4 As shown, when the power supply unit PS has a fuse section HS externally, one of the two fuses in the fuse section HS is installed in the transmission path connecting the commercial power supply (not shown) to the power terminal PS1. Additionally, when the power supply unit PS has a fuse section HS externally, the other of the two fuses in the fuse section HS is installed in the transmission path connecting the commercial power supply (not shown) to the power terminal PS2.

[0141] In addition, such as Figure 5 As shown, the power supply device PS can also be a structure in which one of the two fuses of the fuse section HS is internally provided, and the other of the two fuses of the fuse section HS is externally provided. Figure 5 This is another example of the structure of a power supply device PS that is connected to an auxiliary power supply device 20.

[0142] like Figure 5 As shown, the power supply device PS may also have a structure in which a first fuse HS1 is provided on the transmission path between a commercial power supply (not shown) and a power terminal PS1, and a second fuse HS2 is provided on the input transmission path N between the power terminal PS2 and the rectifier smoothing circuit RS.

[0143] Here, the first fuse section HS1 includes a fuse disposed on the transmission path connecting the commercial power supply (not shown) to the power terminal PS1. Additionally, the second fuse section HS2 includes a fuse disposed on the input transmission path N connecting the power terminal PS2 to the rectifier smoothing circuit section RS.

[0144] As described above, the auxiliary power supply device according to the embodiment (auxiliary power supply device 20 in the example described above) is an auxiliary power supply device connected to a power supply device (power supply device 10 in the example described above). It includes: an auxiliary power supply circuit section (auxiliary power supply circuit section 21 in the example described above) that supplies power to the power supply device when the power supply to the power supply device is cut off; and a secondary power supply circuit section (secondary power supply circuit section 22 in the example described above), whose input side is connected to the power supply device and whose output side is connected to a load (load LD in the example described above), supplying an output voltage to other circuit sections (notification circuit section 215 and switching circuit section 13 in the example described above) based on the power supplied from the power supply device. Therefore, the auxiliary power supply device can suppress the overall enlargement of the system having both the auxiliary power supply circuit section and the secondary power supply circuit section.

[0145] In addition, the auxiliary power supply device can use the following structure: an AC voltage is supplied to the power supply unit from an external power source (in the example described above, power source P), the power supply unit is equipped with a converter that converts the voltage supplied from the power source into a DC voltage (in the example described above, AC / DC converter 111), the auxiliary power supply circuit section is equipped with a transformer-isolated DC / DC converter (in the example described above, DC / DC converter 221), the DC / DC converter is supplied with the DC voltage converted by the converter from the power supply unit, the DC / DC converter converts the supplied DC voltage into a predetermined DC voltage, and outputs the converted DC voltage as an output voltage to other circuit sections.

[0146] In addition, the auxiliary power supply device can be structured as follows: the power supply device further includes: a switching circuit section (in the example described above, switching circuit section 112) that converts the DC voltage converted by the converter into AC voltage; a first transformer (in the example described above, transformer 113) that transmits the AC voltage converted by the switching circuit section from the primary winding to the secondary winding; a rectification and smoothing circuit section (in the example described above, rectification and smoothing circuit section 114) that converts the AC voltage supplied from the secondary winding of the first transformer into DC voltage and outputs the converted DC voltage; a control circuit section (in the example described above, control circuit section 12) that controls the switching circuit section; and a switching circuit section (in the example described above, switching circuit section 13) that switches the control circuit section to enable and disable the switching circuit section according to the supplied voltage. The output side of the auxiliary power supply circuit section is connected to the switching circuit section, and the switching circuit section is supplied with an output voltage as one of the other circuit sections.

[0147] In addition, in the auxiliary power supply device, the following structure can be used: the auxiliary power supply circuit section is connected in parallel with the power supply device and the auxiliary power supply circuit section.

[0148] In addition, the auxiliary power supply device can use the following structure: the power supply device has a smoothing capacitor on the primary side (in the example described above, it is the first smoothing capacitor of the AC / DC converter 111); the auxiliary power supply device has: a first power terminal (in the example described above, it is power terminal 20I11) connected to the first smoothing capacitor terminal of the two terminals of the smoothing capacitor and a second power terminal (in the example described above, it is power terminal 20I12) connected to the second smoothing capacitor terminal of the two terminals of the smoothing capacitor; the auxiliary power supply circuit section and the auxiliary power supply circuit section are connected in parallel between the first power terminal and the second power terminal, the auxiliary power supply circuit section has a first capacitor (in the example described above, it is the first capacitor of the charging and discharging circuit section 211), which is charged by supplying power to the power supply device and discharges a discharge current according to the discharge of the smoothing capacitor.

[0149] In addition, the auxiliary power supply device can use the following structure: the auxiliary power supply circuit section also includes a resistive element (in the example described above, the resistive element R2) connected between the power terminal of either the first power terminal or the second power terminal and the first capacitor, and a diode (in the example described above, the diode D3) connected in parallel with the resistive element between the power terminal and the first capacitor, wherein the direction of current through the diode is from the high potential side of the first capacitor toward the power terminal.

[0150] In addition, in the auxiliary power supply device, the following structure can be used: when the first capacitor is connected to the first power supply terminal and the second capacitor is connected to the second power supply terminal, the discharge current is discharged according to the discharge of the smoothing capacitor.

[0151] In addition, the auxiliary power supply device can use the following structure: the auxiliary power supply circuit section includes: a charging and discharging circuit section with a first capacitor (in the example described above, this is the charging and discharging circuit section 211); a constant current circuit section that outputs a predetermined current based on the voltage applied from the smoothing capacitor or the first capacitor (in the example described above, this is the constant current circuit section 212); a constant voltage circuit section that outputs a predetermined voltage based on the current output from the constant current circuit section (in the example described above, this is the constant voltage circuit section 213); a voltage determination circuit section that determines whether the detection voltage of the first capacitor or the detection voltage of the smoothing capacitor is lower than a reference voltage generated based on the voltage output from the constant voltage circuit section (in the example described above, this is the voltage determination circuit section 214); and a notification circuit section that reports information indicating the determination result of the voltage determination circuit section (in the example described above, this is the notification circuit section 215), and the other circuit sections include the notification circuit section.

[0152] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the specific structure is not limited to these embodiments. As long as the spirit of the present invention is not departed, changes, substitutions, deletions, etc., can be made.

Claims

1. An auxiliary power supply device, wherein the auxiliary power supply device is connected to a power supply device, it has: an auxiliary power supply circuit portion that supplies power to the power supply device in a case where supply of power to the power supply device is cut off; and a sub power supply circuit portion whose input side is connected to the power supply device and whose output side is connected to a load, which supplies an output voltage to other circuit portions in accordance with power supplied from the power supply device, the power supply device has a smoothing capacitor on the primary side, the auxiliary power supply circuit portion has: a first capacitor that is charged by supplying power to the power supply device and that is discharged in accordance with discharge of the smoothing capacitor.

2. The auxiliary power supply device according to claim 1, wherein an alternating voltage is supplied to the power supply device from an external power supply, the power supply device has: a converter that converts a voltage supplied from the power supply into a direct current voltage, the sub power supply circuit portion has: an insulation type DC / DC converter having a transformer, a direct current voltage converted by the converter is supplied to the DC / DC converter from the power supply device, the DC / DC converter converts the supplied direct current voltage into a direct current voltage of a predetermined size and outputs the converted direct current voltage as the output voltage to the other circuit portions.

3. The auxiliary power supply device according to claim 2, wherein the power supply device further has: a switching circuit portion that converts the direct current voltage converted by the converter into an alternating voltage; a first transformer that transmits the alternating voltage converted by the switching circuit portion from a winding on the primary side to a winding on the secondary side; a rectification smoothing circuit portion that converts the alternating voltage supplied from the winding on the secondary side of the first transformer into a direct current voltage and outputs the converted direct current voltage; a control circuit portion that controls the switching circuit portion; and a switching circuit portion that causes the control circuit portion to switch between activation and deactivation of the switching circuit portion in accordance with the supplied voltage, in the sub power supply circuit portion, the output side is connected to the switching circuit portion, the switching circuit portion is taken as one of the other circuit portions, and the output voltage is supplied to the switching circuit portion.

4. The auxiliary power supply device according to any one of claims 1 to 3, wherein the sub power supply circuit portion is connected in parallel with the auxiliary power supply circuit portion with respect to the power supply device.

5. The auxiliary power supply device according to claim 4, wherein the auxiliary power supply device has: a first power supply terminal connected to a first smoothing capacitor terminal among both terminals of the smoothing capacitor; and a second power supply terminal connected to a second smoothing capacitor terminal among both terminals of the smoothing capacitor, the auxiliary power supply circuit portion and the sub power supply circuit portion are connected in parallel between the first power supply terminal and the second power supply terminal.

6. The auxiliary power supply device according to claim 5, wherein the auxiliary power supply circuit portion further has: a second capacitor that is charged by the first capacitor and that is discharged in accordance with discharge of the second capacitor. a resistance element connected between the power supply terminal of either one of the first power supply terminal and the second power supply terminal and the first capacitor; and a diode connected in parallel with the resistance element between the power supply terminal and the first capacitor, the diode passing current in a direction from a high potential side of the first capacitor toward the power supply terminal.

7. The auxiliary power supply device according to claim 5, wherein the first capacitor, in a case where the first smoothing capacitor terminal is connected to the first power supply terminal and the second smoothing capacitor terminal is connected to the second power supply terminal, discharges a discharge current according to discharge of the smoothing capacitor.

8. The auxiliary power supply device according to claim 6, wherein the first capacitor, in a case where the first smoothing capacitor terminal is connected to the first power supply terminal and the second smoothing capacitor terminal is connected to the second power supply terminal, discharges a discharge current according to discharge of the smoothing capacitor.

9. The auxiliary power supply device according to any one of claims 1 to 5, wherein the auxiliary power supply circuit portion includes: a charge / discharge circuit portion including the first capacitor; a constant current circuit portion that outputs a current of a predetermined magnitude based on a voltage applied from the smoothing capacitor or the first capacitor; a constant voltage circuit portion that outputs a voltage of a predetermined magnitude based on a current output from the constant current circuit portion; a voltage determination circuit portion that determines whether a detection voltage of the first capacitor or a detection voltage of the smoothing capacitor is lower than a reference voltage generated based on a voltage output from the constant voltage circuit portion; and a notification circuit portion that notifies information indicating a determination result of the voltage determination circuit portion, the notification circuit portion being included in the other circuit portion.

10. The auxiliary power supply device according to claim 6, wherein the auxiliary power supply circuit portion includes: a charge / discharge circuit portion including the first capacitor; a constant current circuit portion that outputs a current of a predetermined magnitude based on a voltage applied from the smoothing capacitor or the first capacitor; a constant voltage circuit portion that outputs a voltage of a predetermined magnitude based on a current output from the constant current circuit portion; a voltage determination circuit portion that determines whether a detection voltage of the first capacitor or a detection voltage of the smoothing capacitor is lower than a reference voltage generated based on a voltage output from the constant voltage circuit portion; and a notification circuit portion that notifies information indicating a determination result of the voltage determination circuit portion, the notification circuit portion being included in the other circuit portion.

11. The auxiliary power supply device according to claim 7, wherein the auxiliary power supply circuit portion includes: a charge / discharge circuit portion including the first capacitor; a constant current circuit portion that outputs a current of a predetermined magnitude based on a voltage applied from the smoothing capacitor or the first capacitor; a constant voltage circuit portion that outputs a voltage of a predetermined magnitude based on a current output from the constant current circuit portion; ​ ​ a voltage determination circuit section that determines whether a detection voltage of the first capacitor or a detection voltage of the smoothing capacitor is lower than a reference voltage generated based on a voltage output from the constant voltage circuit section; and a notification circuit section that notifies information indicating a determination result of the voltage determination circuit section, the notification circuit section being included in the other circuit sections.

12. The auxiliary power supply device according to claim 8, wherein the auxiliary power supply circuit section includes: a charge-discharge circuit section including the first capacitor; a constant current circuit section that outputs a current of a predetermined magnitude based on a voltage applied from the smoothing capacitor or the first capacitor; a constant voltage circuit section that outputs a voltage of a predetermined magnitude based on a current output from the constant current circuit section; a voltage determination circuit section that determines whether a detection voltage of the first capacitor or a detection voltage of the smoothing capacitor is lower than a reference voltage generated based on a voltage output from the constant voltage circuit section; and a notification circuit section that notifies information indicating a determination result of the voltage determination circuit section, the notification circuit section being included in the other circuit sections.

13. A power supply device, wherein the power supply device is provided with the auxiliary power supply device according to any one of claims 1 to 3.

14. A power supply device, wherein the power supply device is provided with the auxiliary power supply device according to claim 4.

15. A power supply device, wherein the power supply device is provided with the auxiliary power supply device according to claim 5.

16. A medical system, wherein is provided with: the auxiliary power supply device according to any one of claims 1 to 3; the power supply device; and a medical instrument connected to the power supply device as a load.

17. A medical system, wherein is provided with: the auxiliary power supply device according to claim 4; the power supply device; and a medical instrument connected to the power supply device as a load.

18. A medical system, wherein is provided with: the auxiliary power supply device according to claim 5; the power supply device; and a medical instrument connected to the power supply device as a load.

19. The medical system according to claim 16, wherein the power supply device is provided with a fuse or a circuit breaker provided in at least one of two input transmission paths on a primary side of the power supply device.

20. The medical system according to claim 17, wherein the power supply device is provided with a fuse or a circuit breaker provided in at least one of two input transmission paths on a primary side of the power supply device.

21. The medical system according to claim 18, wherein the power supply device is provided with a fuse or a circuit breaker provided in at least one of two input transmission paths on a primary side of the power supply device. ​

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