WO2018159552A1 - 電源基板、電源ユニットならびに冷凍装置 - Google Patents
電源基板、電源ユニットならびに冷凍装置 Download PDFInfo
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- WO2018159552A1 WO2018159552A1 PCT/JP2018/007024 JP2018007024W WO2018159552A1 WO 2018159552 A1 WO2018159552 A1 WO 2018159552A1 JP 2018007024 W JP2018007024 W JP 2018007024W WO 2018159552 A1 WO2018159552 A1 WO 2018159552A1
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- WIPO (PCT)
- Prior art keywords
- power
- power supply
- generation circuit
- common mode
- power generation
- Prior art date
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Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/01—Arrangements for reducing harmonics or ripples
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
- F24F1/06—Separate outdoor units, e.g. outdoor unit to be linked to a separate room comprising a compressor and a heat exchanger
- F24F1/20—Electric components for separate outdoor units
- F24F1/22—Arrangement or mounting thereof
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
- F24F1/06—Separate outdoor units, e.g. outdoor unit to be linked to a separate room comprising a compressor and a heat exchanger
- F24F1/20—Electric components for separate outdoor units
- F24F1/24—Cooling of electric components
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B1/00—Compression machines, plants or systems with non-reversible cycle
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/12—Arrangements for reducing harmonics from ac input or output
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M5/00—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases
- H02M5/40—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc
- H02M5/42—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters
- H02M5/44—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac
- H02M5/453—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac using devices of a triode or transistor type requiring continuous application of a control signal
- H02M5/458—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
- H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
- H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/40—Arrangements for reducing harmonics
Definitions
- the present invention relates to a power supply board, a power supply unit including the power supply board, and a refrigeration apparatus including the power supply board.
- Various electrical devices such as refrigeration equipment operate with power supplied from a commercial power source.
- Various electric devices include a power supply circuit for converting power from a commercial power source into desired power, a control circuit for controlling a drive source (motor) of component devices included in the various electric devices, and the like on the printed circuit board.
- the printed circuit board is disposed in various electric devices.
- Patent Document 1 is known as a technique related to the printed circuit board.
- two printed circuit boards are housed in an air conditioner.
- a power supply circuit for converting an AC power supply from a commercial power supply and control circuits for the compressor motor and the fan motor are mounted on one printed circuit board.
- a circuit for performing control (valve control, communication control between the outdoor unit and the indoor unit, etc.) other than the compressor motor and the fan motor is mounted.
- the common mode noise is generated based on a potential difference between the power supply wiring and the GND wiring when a current having the same phase flows through the power supply wiring and the GND wiring.
- Fig. 1 shows a conventional example of a power supply unit (110) with common mode noise countermeasures.
- the power supply unit (110) includes a power supply board (120) which is a printed board and a noise removal board (140).
- the power supply board (120) is a three-phase four-wire commercial power supply (91) via a noise removal board (140) by means of a three-phase harness (Lr, Ls, Lt) and a neutral harness (Ln). )It is connected to the.
- the power supply board (120) includes an AC 400V circuit (124) that generates power to be supplied to the compressor motor (92), and an AC 200V circuit (125) that generates power to be supplied to the fan motor (93). Has been implemented.
- On the noise removal board (140), two 4-wire common mode choke coils (143, 144) and a control circuit (145) for performing refrigerant control and the like of the air conditioner are mounted.
- each common mode choke coil (143, 144) has four wires corresponding to the neutral point in addition to the R phase, the S phase, and the T phase. The formula is adopted, and two of these are implemented side by side. Since the 4-wire common mode choke coil (143,144) is larger than the 3-wire and 2-wire types, the mounting area occupied by the common mode choke coil (143,144) on the noise removal board (140) is also Get bigger.
- one common The length of the conductive wire wound around the mode choke coil is about twice that of the common mode choke coil when using two, or the core material is made of a material with high noise removal capability. Need to change. Even with this method, the mounting area occupied by one common mode choke in the noise removing substrate (140) increases, and the height of the noise removing substrate (140) also increases. Therefore, the cost of the power supply unit (110) also increases.
- the present invention has been made in view of such a point, and an object thereof is to reduce the size of a printed circuit board as much as possible without significantly reducing the effect of reducing common mode noise.
- a first aspect of the present disclosure is a power supply board (20) that supplies different power to each of a plurality of loads (92, 93), and an input connected to a three-phase four-wire AC power supply (91) 3 based on the input AC power from the terminal (21), the three-phase wiring (31r, 31s, 31t) and the neutral point wiring (31n) that are electrically connected to the input terminal (21), and the AC power source (91).
- a first power generation circuit (24) for generating phase first output power, a second power generation circuit (25) for generating single-phase second output power based on the input AC power, and the input terminal ( 21) and the first power generation circuit (24) are connected to the three-phase wiring (31r, 31s, 31t) and the first power generation via the three-phase wiring (31r, 31s, 31t)
- a power supply board comprising a two-wire second common mode choke coil (28) to be operated.
- the power supply substrate (20) is not provided with a 4-wire common mode choke coil, but a 3-wire first common mode choke coil (27) corresponding to the first power generation circuit (24); A single-phase or two-wire second common mode choke coil (28) corresponding to the second power generation circuit (25) is provided.
- the total size of the first common mode choke coil (27) and the second common mode choke coil (28) is smaller than one 4-wire type common mode choke coil.
- these common mode choke coils (27, 28) have the above-described wiring structure, and thus have the same effect of reducing common mode noise as that of a 4-wire common mode choke coil.
- the common mode choke coils (27, 28) are of a three-wire type and a two-wire type, the size of each of these coils (27, 28) is relatively small. Therefore, each coil (27, 28) can be easily arranged in an empty space on the power supply board (20), and the degree of freedom in layout of the three-phase wiring (31r, 31s, 31t) and the neutral point wiring (31n) is increased. Therefore, the power supply board (20), which is a printed circuit board, can be made as small as possible without significantly reducing the effect of reducing the common mode noise. Therefore, the manufacturing cost of the power supply board (20) can be reduced.
- the printed wiring board (P1) on which the mode choke coil (28) is mounted is further provided.
- the printed wiring board (P1) has a quadrangular shape in plan view, and the printed wiring board (P1) is shown in plan view.
- a weak electric region (a2) located on the second side (P1b) side, and the second common mode choke coil (28) is connected to the first common mode choke coil (27) in the high electric region (a1).
- the first common mode choke coil (27) and the second common mode choke coil (28) are further mounted so as to be closer to the weak current region (a2) than It is a substrate.
- the first power generation circuit (24), the second power generation circuit (25), and the low-power area (a2) that generate higher power than the second power generation circuit (25) They are in order. That is, since the first power generation circuit (24) is away from the weak power region (a2), the weak power components mounted in the weak power region (a2) are separated from the high power components constituting the first power generation circuit (24). Less susceptible to noise.
- the second common mode choke coil (28) is located closer to the weak current region (a2) than the first common mode choke coil (27). That is, the second common mode choke coil (28) is positioned relatively close to the corresponding second power generation circuit (25), and the first common mode choke coil (27) is connected to the corresponding first power generation circuit (24).
- the wiring patterns of the three-phase wiring (31r, 31s, 31t) and the neutral point wiring (31n) between each common mode choke coil (27, 28) and the corresponding power generation circuit (24, 25) can be as simple as possible.
- the plurality of loads (92, 93) include a compressor motor (92) and a fan motor (93) included in the refrigeration apparatus (60).
- the first power generation circuit (24) outputs the first output power to the compressor motor (92), and the second power generation circuit (25) outputs the second output power to the compressor motor (92).
- a fourth aspect of the present disclosure is a refrigeration apparatus (60) having a refrigerant circuit, the power supply board (20) according to any one of the first to third aspects, and the power supply board ( 20) a cooling unit that cools the inverters (24d, 25d) included in each of the first power generation circuit (24) and the second power generation circuit (25) using the refrigerant used in the refrigerant circuit. 75).
- the casing (61) further includes a casing (61) that houses the plurality of loads (92, 93) and the power supply board (20).
- the casing (61) has an opening / closing plate (63a) that can be opened, and the power supply board (20) is disposed at a position corresponding to the opening / closing plate (63a) in the casing (61). This is a refrigeration apparatus.
- the power supply board (20) there is provided between the power supply board (20) according to any one of the first to third aspects, the AC power supply (91), and the power supply board (20). And a noise removal substrate (40) connected to the four-wire third common mode choke coil (43) for reducing a common mode noise component with respect to the input AC power.
- the input AC power is applied to the noise removing substrate (40) in the first common mode choke coil (27) and the second common mode choke coil (28) of the power supply substrate (20).
- the power supply unit is supplied through the third common mode choke coil (43).
- This power supply unit (10) is a 4-wire separate from the power supply board (20) provided with the 3-wire first common mode choke coil (27) and the 2-wire second common mode choke coil (28).
- a noise removing substrate (40) having a third common mode choke coil (43) of the formula is provided.
- the noise removal substrate (40) is connected to the power supply substrate (20)
- the effect of removing the common mode noise is enhanced as compared with the case of the power supply substrate (20) alone.
- the noise removal substrate (40) can be connected to the power supply substrate (20).
- the common mode noise reduction effect can be changed according to the environment in which the power supply unit (10) is installed.
- the noise removing substrate (40) is provided separately from the power supply substrate (20), for example, the noise removing substrate (40) has a four-layer structure and the noise removing substrate (40) has a two-layer structure.
- the number of layers of the removal substrate (40) and the number of layers of the power supply substrate (20) can be made different. Therefore, it is possible to realize a lower cost than the case where the noise removing substrate (40) has a four-layer structure like the power supply substrate (20).
- there is one four-wire third common mode choke coil (43) mounted on the noise removal board (40) the circuit configuration mounted on the noise removal board (40) is relatively small. It will be easy.
- a seventh aspect of the present disclosure is a refrigeration apparatus (60) having a refrigerant circuit, the power supply unit (10) according to the sixth aspect, and the power supply board (20) of the power supply unit (10).
- a refrigeration apparatus comprising:
- the seventh aspect further includes a casing (61) that houses the plurality of loads (92, 93) and the power supply unit (10), and the casing (61) includes:
- the casing (61) has an opening / closing plate (63a) that can be opened, and the power supply board (20) in the power supply unit (10) corresponds to the opening / closing plate (63a) in the casing (61).
- the refrigeration apparatus is arranged at a position where
- the power supply substrate (20) that is the printed circuit board can be made as small as possible without significantly reducing the effect of reducing the common mode noise.
- FIG. 1 is a schematic configuration diagram of a conventional power supply board and power supply unit.
- FIG. 2 is a schematic configuration diagram of a power supply board and a power supply unit according to the present embodiment.
- FIG. 3 is a layout diagram of the power supply board other than the connector.
- FIG. 4 is a diagram illustrating an arrangement position of the power supply unit according to the present embodiment in the outdoor unit.
- FIG. 5 is a longitudinal sectional view of the power supply unit attached to the refrigerant pipe.
- FIG. 2 schematically shows the configuration of the power supply unit (10) according to the present embodiment.
- the power supply unit (10) according to the present embodiment is mounted on an outdoor unit of an air conditioner (60) that is an example of a refrigeration apparatus.
- the power supply unit (10) receives input AC power from a commercial power supply (91) that is a three-phase four-wire AC power supply and drives a load that is a component included in the air conditioner (60). It supplies power.
- the component (ie, load) of the air conditioner (60) to which power is supplied from the power supply unit (10) is a compressor motor that is a drive source of the compressor (71) (see FIG. 3).
- (92) is a fan motor (93) which is a drive source of the outdoor fan (not shown).
- the power supply unit (10) is electrically connected not only to the commercial power supply (91) but also to the compressor motor (92) and the fan motor (93).
- the power supply unit (10) converts the input AC power from the commercial power supply (91) into power that can be driven by the compressor motor (92) and the fan motor (93), and converts this to each motor (92, 93). Output. Thereby, each motor (92, 93) can be driven.
- such a power supply unit (10) has two printed boards, specifically, a power supply board (20) and a noise removal board (40).
- the power supply board (20) is connected to the compressor motor (92) and the fan motor (93).
- a noise removing board (40) is connected between the power board (20) and the commercial power source (91).
- the power board (20) includes a connector (21, 22, 23), four wires (31r, 31s, 31t, 31n), a first power generation circuit (24), and a second power generation circuit (25). And a control circuit (26), a first common mode choke coil (27), and a second common mode choke coil (28). As shown in FIG. 3, these are mounted on a printed wiring board (P1) having a substantially rectangular shape in plan view.
- a printed wiring board (P1) of the power supply board (20) has a four-layer structure. Thereby, the power supply board (20) can be miniaturized as much as possible.
- the connectors (21, 22, 23) are for electrically connecting the power supply board (20) to another device and the other board by a harness.
- the connector (21) is an input terminal connected to the noise removal board (40), and is connected to the commercial power supply (91) via the noise removal board (40).
- the connector (22) is an output terminal connected to the compressor motor (92).
- the connector (23) is an output terminal connected to the fan motor (93).
- Each connector (21, 22, 23) has a housing made of resin, etc., and within the housing, supports the R phase, S phase, T phase and neutral point of the commercial power supply (91) Thus, for example, four metal foils such as copper are arranged.
- Each connector (21, 22, 23) is located near the end of the power supply board (20) so that the harness is easily connected.
- Each connector (21, 22, 23) has a structure in which the harness is detachably connected.
- the wirings (31r, 31s, 31t, 31n) are electrically connected to the connector (21) which is an input terminal.
- the wirings (31r, 31s, 31t) are three-phase wirings corresponding to the R phase, S phase, and T phase of the three-phase four-wire commercial power source (91).
- the wiring (31n) is a neutral point wiring corresponding to the neutral point of the three-phase four-wire commercial power supply (91).
- these wirings (31r, 31s, 31t, 31n) are not shown in FIG. 3, they are formed of a metal foil such as copper on the printed wiring board (P1).
- each of the R-phase and T-phase three-phase wirings (31r, 31t) includes a wiring (32r, 32t) and a wiring (33r, 33t).
- One end of each wiring (32r, 32t) is connected to the connector (21), and the other end is connected to the first common mode choke coil (27).
- One end of each wiring (33r, 33t) is connected to the other end of the wiring (32r, 32t) via the first common mode choke coil (27), and the other end is input to the first power generation circuit (24). It is connected to the.
- the S-phase three-phase wiring (31s) includes four wirings (32s, 33s, 34s, 37s). One end of the wiring (32s) is connected to the connector (21), and the other end is connected to the first common mode choke coil (27). One end of the wiring (33s) is connected to the other end of the wiring (32s) via the first common mode choke coil (27), and the other end is connected to the input of the first power generation circuit (24).
- the wiring (34s) is a branch wiring of the wiring (32s), and one end is connected to the wiring (32s) and the other end is connected to the second common mode choke coil (28).
- the wiring (37s) has one end connected to the second common mode choke coil (28) and the other end connected to the input of the second power generation circuit (25).
- One end of the neutral point wiring (31n) is connected to the connector (21), and the other end is connected to one end of the wiring (37n) via the second common mode choke coil (28).
- the other end of the wiring (37n) is connected to the input of the second power generation circuit (25).
- the first power generation circuit (24) generates three-phase first output power based on input AC power from the commercial power supply (91).
- the first power generation circuit (24) is a power conversion circuit including a converter (24a), a reactor (24b), a capacitor (24c), and an inverter (24d) formed of a diode bridge.
- Input AC power from the commercial power supply (91) is rectified by the converter (24a), smoothed by the capacitor (24c), and then converted to AC power having a desired frequency and amplitude by the inverter (24d).
- the converted AC power is output as first output power to the compressor motor (92) via the output wiring (35u, 35v, 35w) and the connector (22) in FIG.
- the case where the first output power is an AC power supply of about 400 V is taken as an example.
- the second power generation circuit (25) generates single-phase second output power based on input AC power from the commercial power supply (91).
- the second power generation circuit (25) is similar to the first power generation circuit (24) in that a converter (25a), a reactor (25b), a capacitor (25c), an inverter ( 25d).
- the process of generating the second output power by the second power generation circuit (25) is the same as that of the first power generation circuit (24).
- the second output power which is AC power converted by the second power generation circuit (25), is output to the fan motor (93) via the output wiring (36u, 36v, 36w) and the connector (23).
- the case where the second output power is different from the first output power and is an AC power supply of about 200 V is taken as an example. That is, in the present embodiment, the second output power is smaller than the first output power.
- the control circuit (26) is composed of low-power components such as a memory and a CPU. When the CPU reads and executes the program stored in the memory, the control circuit (26) performs refrigerant control of the air conditioner (60) on which the power supply unit (10) is mounted.
- the refrigerant control includes switching control of the four-way switching valve (72) according to FIG.
- the control circuit (26) may perform control of power generation operation of each power generation circuit (24, 25), rotation speed control of each motor (92, 93) as a load, and the like.
- the inverters (24d, 25d) in each power generation circuit (24, 25) include a plurality of switching elements, and each output power is generated by repeating ON and OFF at appropriate timings.
- the control circuit (26) may perform on / off control of each switching element.
- control circuit (26) is arranged not on the noise removal board (40) but on the power supply board (20).
- the first common mode choke coil (27) is a three-wire common mode choke coil having a structure in which three conductors are wound around one core material (for example, a ferrite core). Therefore, the first common mode choke coil (27) has 6 terminals.
- the first common mode choke coil (27) is connected on the three-phase wiring (31r, 31s, 31t) between the connector (21) and the first power generation circuit (24).
- one end of each of the three conducting wires of the first common mode choke coil (27) is connected to the other end of the corresponding three-phase wiring (31r, 31s, 31t) wiring (32r, 32s, 32t).
- the other end of each of the conductive wires is connected to one end of the wiring (33r, 33s, 33t) of the corresponding three-phase wiring (31r, 31s, 31t).
- Such a first common mode choke coil (27) reduces common mode noise with respect to the input AC power supplied to the first power generation circuit (24) via the three-phase wiring (31r, 31s, 31t).
- the second common mode choke coil (28) is a single-phase or two-wire common mode choke coil having a structure in which two conductors are wound around one core material (for example, a ferrite core). Therefore, the second common mode choke coil (28) has four terminals.
- the second common mode choke coil (28) is a predetermined wiring corresponding to one phase of the three-phase wiring (31r, 31s, 31t) between the connector (21) and the second power generation circuit (25). They are connected on (here, the S-phase wiring (31s)) and on the neutral point wiring (31n). That is, one end of each of the two conducting wires of the second common mode choke coil (28) is connected to the other end of the S-phase wiring (31s) wiring (34s) and the other end of the neutral point wiring (31n), respectively. The other ends of the two conductive wires are connected to the second power generation circuit (25) via wiring (37s, 37n).
- Such a second common mode choke coil (28) is common to the input AC power supplied to the second power generation circuit (25) via the S-phase wiring (31s) and the neutral point wiring (31n). Reduce mode noise.
- the three-wire first common mode choke coil (27) and the two-wire second common mode choke coil (28) are used in combination. Since the first output power is higher than the second output power, the first power generation circuit (24) can be said to be a circuit that is stronger than the second power generation circuit (25). Therefore, the first common mode choke coil (27) corresponding to the first power generation circuit (24) has a higher noise removal capability than the second common mode choke coil (28) corresponding to the second power generation circuit (25). Or the coil size is large. That is, the coil of each common mode choke coil (27, 28) has a higher noise removal capability of each common mode choke coil (27, 28) as the output power of the corresponding power generation circuit (24, 25) increases. The size differs according to the magnitude of the output power of the corresponding power generation circuit (24, 25) so that the output power of the corresponding power generation circuit (24, 25) increases as the output power increases.
- the wiring that wastes the wiring so that the three-phase wiring (31r, 31s, 31t) and the neutral point wiring (31n) do not all run in parallel Even without adopting a pattern, all the wiring patterns of the three-phase wiring (31r, 31s, 31t) and the neutral point wiring (31n) are naturally determined to be patterns that do not run in parallel. Therefore, not only common mode noise can be reduced in each common mode choke coil (27, 28), but also three-phase wiring (31r, 31s, 31t) and neutral point wiring (31n) run in parallel. The generation of common mode noise due to can be reduced.
- the printed wiring board (P1) has a rectangular shape in plan view as described above. That is, the printed wiring board (P1) has a first short side (P1a) (corresponding to the first side), a second short side (P1b) (corresponding to the second side) facing the first short side (P1a), A rectangle composed of a first long side (P1c) extending from the first short side (P1a) toward the second short side (P1b) and a second long side (P1d) facing the first long side (P1c). It is a flat plate.
- the printed wiring board (P1) has a strong electric region (a1) and a weak electric region (a2) between the first short side (P1a) and the second short side (P1b) in plan view.
- the high-power area (a1) is the area from the first short side (P1a) to more than half of the printed wiring board (P1) (about 2/3 in Fig. 3) in the surface area of the printed wiring board (P1).
- the weak electricity region (a2) is located on the second short side (P1b) side of the strong electricity region (a1) and is aligned with the strong electricity region (a1).
- the weak electrical area (a2) occupies the remaining area of the printed wiring board (P1) from the second short side (P1b) of the surface area of the printed wiring board (P1) (about 1/3 in Fig. 3). There are relatively weak parts.
- the above-described AC 400 V system first power generation circuit (24) and AC 200 V system second power generation circuit (25) are mounted in the high power region (a 1).
- the AC400V first power generation circuit (24) is located closer to the first short side (P1a) than the AC200V second power generation circuit (25).
- the control circuit (26) described above is mounted in the low-power area (a2).
- the printed circuit board (P1) includes a first power generation circuit of AC400V system along the long side (P1c, P1d) from the first short side (P1a) to the second short side (P1b).
- the first power generation circuit (24), which is the strongest circuit, and the control circuit (26), which is the weakest circuit, are not directly lined up, but the second power generation circuit (25) that has an intermediate potential therebetween. Is away by being located. For this reason, the low-power component mounted in the low-power region (a2) is not easily affected by noise from the high-power component constituting the first power generation circuit (24).
- the first common mode choke coil (27) and the second common mode choke coil (28) are mounted in the high-power region (a1).
- the second common mode choke coil (28) is located closer to the weak current region (a2) than the first common mode choke coil (27). That is, the second common mode choke coil (28) is positioned relatively close to the corresponding second power generation circuit (25), and the first common mode choke coil (27) is connected to the corresponding first power generation circuit (24). ) And a position relatively close to each other. Therefore, the wiring patterns of the three-phase wiring (31r, 31s, 31t) and the neutral point wiring (31n) between each common mode choke coil (27, 28) and the corresponding power generation circuit (24, 25) are Simplify as much as possible, without wasting around.
- the noise removing board (40) includes two connectors (41, 42), four wires (51r, 51s, 51t, 51n), and one third common mode choke coil ( 43). These are mounted on a printed wiring board having a substantially rectangular flat plate shape, which is different from the power supply board (20).
- the noise removal board (40) Since the number of circuits (components) mounted on the noise removal board (40) is smaller than that of the power supply board (20), the noise removal board (40) is smaller than the power supply board (20). A printed circuit board having a two-layer structure with a small number of layers is employed. As a result, the cost of the noise removing substrate (40) can be reduced.
- the connectors (41, 42) are for electrically connecting the noise removal board (40) to the commercial power supply (91) and the power supply board (20) through a harness.
- the connector (41) is an input terminal connected to the commercial power supply (91), and the connector (42) is an output terminal connected to the power supply board (20).
- each connector (41, 42) has a casing made of resin or the like, and a commercial power source (91) is provided inside the casing.
- a commercial power source (91) is provided inside the casing.
- four metal foils such as copper are formed in a line.
- Each connector (41, 42) is positioned near the end of the noise removal board (40) so that a harness from the outside of the noise removal board (40) is easily connected.
- Each connector (41, 42) has a structure in which the harness is detachably connected.
- the noise removal board (40) is selected in an environment where the EMI countermeasure standard is strict and not selected in an environment where the EMI countermeasure standard is not so strict. be able to.
- the harnesses (Lr, Ls, Lt, Ln) extending from the commercial power supply (91) are directly connected to the connector (21) of the power supply board (20).
- the wiring (51r, 51s, 51t, 51n) are electrically connected to the connector (41).
- the wiring (51r, 51s, 51t) corresponds to the R phase, S phase, and T phase of the three-phase four-wire commercial power supply (91), and the wiring (51n) is a three-phase four-wire commercial power supply. Wiring corresponding to the neutral point of the power supply (91).
- These wirings (51r, 51s, 51t, 51n) are formed on a printed wiring board by a metal foil such as copper.
- each wiring (51r, 51s, 51t, 51n) includes a wiring (52r, 52s, 52t, 52n) and a wiring (53r, 53s, 53t, 53n).
- One end of each wiring (52r, 52s, 52t, 52n) is connected to the connector (21), and the other end is connected to the third common mode choke coil (43).
- One end of each wiring (53r, 53s, 53t, 53n) is connected to the third common mode choke coil (43), and the other end is connected to the connector (42).
- the third common mode choke coil (43) is a four-wire common mode choke coil having a structure in which four conductors are wound around one core material (for example, a ferrite core). Therefore, the third common mode choke coil (43) has 8 terminals.
- the third common mode choke coil (43) is connected between the two connectors (41, 42), that is, between the commercial power supply (91) and the power supply board (20).
- Such a third common mode choke coil (43) reduces common mode noise with respect to input AC power from the commercial power supply (91). Therefore, the input AC power is applied to the first common mode choke coil (27) and the second common mode choke coil (28) of the power supply board (20), respectively, and the third common mode choke coil of the noise removal board (40). Via (43), the common mode noise is supplied in a state reduced to some extent.
- the four wires of the third common mode choke coil (43) are not particularly long, and are, for example, about the same as the first common mode choke coil (27) and the second common mode choke coil (28). It is.
- the power supply unit (10) is included in the outdoor unit of the air conditioner (60).
- the arrangement position of the power supply unit (10) in the outdoor unit of the air conditioner (60) will be described with reference to FIGS.
- the power supply unit (10) includes the power supply board (20) and the noise removal board (40).
- the inverter (24d) in each power generation circuit (24, 25) of the power supply board (20) is provided.
- 25d) includes a plurality of switching elements which are power elements.
- the inverter (24d, 25d) generates heat.
- the converter (24a, 25a) including a plurality of diodes also generates heat when a large current flows. Therefore, it is preferable to cool the converter (24a, 25a).
- the power supply board (20) is attached to a refrigerant pipe (75) (corresponding to a cooling unit) included in the outdoor unit of the air conditioner (60).
- the outdoor unit of the air conditioner (60) includes the power supply unit (10), the outdoor unit casing (61) (corresponding to the casing), and the refrigerant pipe (75) corresponding to the cooling unit.
- the outdoor unit casing (61) is a steel plate box formed in a substantially rectangular parallelepiped shape, and includes the power unit (10) and various motors (92, 93) that are loads of the power unit (10). Accommodate.
- the outdoor unit casing (61) includes a bottom plate (62) and a side plate (63) erected on the bottom plate (62). Although not shown in FIG. 3, the outdoor unit casing (61) also has a top plate attached to the upper end of the side plate (63).
- a partition plate (64) extending rearward from the front side plate (63) is erected on the bottom plate (62).
- the partition plate (64) is formed in a substantially V shape in a plan view, and partitions the internal space of the outdoor unit casing (61) into a left blower chamber (S1) and a right machine chamber (S2).
- the blower chamber (S1) includes a substantially L-shaped outdoor heat exchanger (65), a fan motor (93), and a motor (93) in plan view along the rear surface from the left surface of the side plate (63).
- an outdoor fan (not shown) using a drive source as a drive source.
- the machine room (S2) has a compressor (71) mounted on the bottom surface (62), a four-way selector valve (72) located above the compressor (71), and an expansion located near the compressor (71).
- the compressor (71) includes a compressor motor (92).
- the right side part (63a) of the side plate (63) constituting the machine room (S2) can be removed from the remaining part of the outdoor unit casing (61) as shown in FIG. It is possible.
- the maintenance operator can remove the right side part (63a) and access the arrangement device in the machine room (S2).
- the right part (63a) is removed, the inside of the outdoor unit casing (61) corresponding to the part (63a) (that is, the machine room (S2)) is exposed.
- the right side portion (63a) of the side plate (63) corresponds to an opening / closing plate capable of opening the interior of the outdoor unit casing (61).
- the compressor (71), the four-way switching valve (72), the outdoor heat exchanger (65), the expansion valve (73), and the accumulator (74) are all components of the refrigerant circuit, and these are refrigerant pipes.
- the power supply unit (10) including the power supply board (20) has the right side portion inside the outdoor unit casing (61). (63a) is located above the compressor (71) in a state attached to the refrigerant pipe (75).
- FIG. 5 is a diagram simply showing a longitudinal section of the power supply unit (10) attached to the refrigerant pipe (75).
- the surface of the power supply board (20) is formed in a rectangular shape in plan view at a position corresponding to the heat generation target functional unit including the converter (24a, 25a) and the inverter (24d, 25d).
- the made heat radiator (81) made of copper, for example, is fixed to the power supply board (20) with screws or the like. More specifically, the converters (24a, 25a) and the inverters (24d, 25d) that are the heat generation target functional units are arranged along the long sides (P1c, P1d) of the power supply board (20) as shown in FIG.
- the radiator (81) is arranged so as to cover them from the front side of the heat generation target functional unit.
- the back surface of the power supply substrate (20) is fixed to one surface of a flat sheet metal (82) with screws or the like.
- the noise removing substrate (40) is fixed to the other surface of the sheet metal (82) with screws or the like.
- the power supply unit (10) having such a configuration includes a refrigerant pipe (81a) in the pipe insertion groove (81a) formed along the longitudinal direction of the radiator (81) inside the radiator (81). 75) is attached to the refrigerant pipe (75).
- the heat of the inverter (24d, 25d) is radiated to the refrigerant flowing through the machine room (S2), particularly the refrigerant pipe (75), via the radiator (81) and the sheet metal (82), and the inverter (24d, 25d) ) Is cooled. Therefore, in the present embodiment, the refrigerant can be effectively used without separately providing means such as an air-cooling fan as means for cooling the inverters (24d, 25d).
- the power supply unit (10) is provided at a position corresponding to the right side portion (63a) of the removable side plate (63). As a result, if the maintenance worker removes the right side part (63a), the power supply unit (10) is attached to and removed from the refrigerant pipe (75), and the power supply unit (10) is connected to the refrigerant pipe (75). It is possible to easily check whether it is attached.
- the power supply board (20) of the present embodiment is not provided with a four-wire common mode choke coil, but a three-wire first common mode choke coil (27) corresponding to the first power generation circuit (24). ) And a single-phase or two-wire second common mode choke coil (28) corresponding to the second power generation circuit (25).
- the first common mode choke coil (27) is connected to the three-phase wiring (31r, 31s, 31t) between the connector (21) and the first power generation circuit (24), and the second common mode choke coil ( 28) is an S-phase wiring (31s) that is one phase of the three-phase wiring (31r, 31s, 31t) and the neutral point wiring between the connector (21) and the second power generation circuit (25). (31n) and connected.
- the total size of the first common mode choke coil (27) and the second common mode choke coil (28) is smaller than one 4-wire type common mode choke coil. Furthermore, these common mode choke coils (27, 28) have the above-described wiring structure, and thus have the same effect of reducing common mode noise as that of a 4-wire common mode choke coil. Further, since the common mode choke coils (27, 28) are of a three-wire type and a two-wire type, the size of each coil is relatively small. Therefore, each coil (27, 28) can be easily arranged in an empty space on the power supply board (20), and the degree of freedom in layout of the three-phase wiring (31r, 31s, 31t) and the neutral point wiring (31n) is increased. Therefore, the power supply board (20), which is a printed circuit board, can be made as small as possible without significantly reducing the effect of reducing the common mode noise. Therefore, the manufacturing cost of the power supply board (20) can be reduced.
- the first power generation circuit (24) is separated from the weak power region (a2), the weak power component in the weak power region (a2) is affected by the noise from the high power components constituting the first power generation circuit (24). It is hard to receive.
- the second common mode choke coil (28) is located closer to the weak current region (a2) than the first common mode choke coil (27).
- the second common mode choke coil (28) is positioned relatively close to the corresponding second power generation circuit (25), and the first common mode choke coil (27) is connected to the corresponding first power generation circuit (24). ) And a position relatively close to each other. Therefore, the wiring patterns of the three-phase wiring (31r, 31s, 31t) and the neutral wiring (31n) between each common mode choke coil (27, 28) and the corresponding power generation circuit (24, 25). Can be simplified as much as possible.
- the first power generation circuit (24) outputs the first output power to the compressor motor (92) included in the air conditioner (60).
- the second power generation circuit (25) outputs the second output power to the fan motor (93) that is also included in the air conditioner (60).
- the power supply unit (10) of the present embodiment includes a power supply substrate (20) provided with a three-wire first common mode choke coil (27) and a two-wire second common mode choke coil (28). Separately includes a noise removal substrate (40) having a four-wire third common mode choke coil (43).
- the noise removal substrate (40) is connected to the power supply substrate (20)
- the effect of removing the common mode noise is enhanced as compared with the case of the power supply substrate (20) alone.
- the noise removal substrate (40) is connected to the power supply substrate (20) and used depending on the environment in which the power supply unit (10) is installed.
- the common mode noise reduction effect can be changed.
- the noise removing substrate (40) is provided separately from the power supply substrate (20), for example, the noise removing substrate (40) has a four-layer structure and the noise removing substrate (40) has a two-layer structure.
- the number of layers of the removal substrate (40) and the number of layers of the power supply substrate (20) can be made different. Therefore, it is possible to realize a lower cost than the case where the noise removing substrate (40) has a four-layer structure like the power supply substrate (20).
- there is one four-wire third common mode choke coil (43) mounted on the noise removal board (40) the circuit configuration of the noise removal board (40) is relatively simple.
- the inverters (24d, 25d) of the first power generation circuit (24) and the second power generation circuit (25) are cooled using the refrigerant in the air conditioner (60). Accordingly, it is not necessary to separately provide a cooling unit that is driven by separate power such as an air cooling fan, and the refrigerant can be effectively used for cooling the inverters (24d, 25d) that generate heat.
- the power supply board (20) of the present embodiment is disposed at a position corresponding to the right side part (63a) of the removable side plate (63) in the outdoor unit casing (61).
- the maintenance worker can freely access the power supply board (20) inside the outdoor unit casing (61) from the right side portion (63a), so that the maintenance workability is improved.
- the inverters (24d, 25d) of the respective power generation circuits (24, 25) are cooled using the refrigerant, the maintenance worker opens the casing (61) with the right side portion (63a), and the inverter ( 24d, 25d) can be confirmed whether or not the cooling is normally performed.
- the power supply unit (10) can be mounted on an apparatus other than the refrigeration apparatus including the air conditioner. Further, when the power supply unit (10) is mounted on the refrigeration apparatus, it may be mounted on the indoor unit instead of the outdoor unit.
- the load of the power supply unit (10) is not limited to the combination of the compressor motor (92) and the fan motor (93) as long as it is a device that can receive power from the power supply unit (10).
- the number of loads of the power supply unit (10) is not limited to two.
- the cooling means is not limited to the refrigerant pipe (75), and any means can be used as long as it can cool the heat generation target functional unit such as the inverter (24d, 25d). May be.
- the cooling means may be an air-cooled fan or the like, or may be a cooling means using water instead of a refrigerant.
- cooling unit may not be provided depending on the degree of heat generation of the heat generating target functional unit.
- the arrangement position of the power supply unit (10) is not limited to FIG.
- the noise removal substrate (40) is provided between the commercial power supply (91) and the power supply substrate (20) has been described, but the noise removal substrate (40) is not essential. As already described, the noise removal substrate (40) may not be provided in an environment where EMI countermeasures are unnecessary. Also in this case, similarly to the above, the heat generation target functional unit such as the inverter (24d, 25d) may be cooled using the refrigerant pipe (75) or other means. Even when the noise removal substrate (40) is not provided, the position of the power supply substrate (20) is not limited to that shown in FIG.
- the first power generation circuit (24) is not limited to the AC400V system.
- the second power generation circuit (25) is not limited to the AC 200V system.
- the inverter (24d, 25d) may be built in the motor (92, 93) as a load instead of being mounted on the power supply board (20).
- the noise removal board (40) has one 3-wire common mode choke coil and two-wire common mode (single-phase) instead of one 4-wire third common mode choke coil (43).
- One choke coil may be mounted.
- the present invention achieves the effect of reducing the size of the power supply board (20) as much as possible without greatly reducing the effect of reducing the common mode noise. Useful in some cases.
- Power supply unit 20 Power supply board 21 Connector (input terminal) 24 First power generation circuit 25 Second power generation circuit 27 First common mode choke coil 28 Second common mode choke coil 31r, 31s, 31t 3-phase wiring 31n Neutral point wiring 40 Noise reduction board 43 3rd common mode choke coil 60 Air conditioning equipment (refrigeration equipment) 61 Outdoor unit casing (casing) 63a Right side part of the side plate (opening / closing part) 75 Refrigerant piping (cooling section) 91 Commercial power supply (AC power supply) 92 Compressor motor 93 Fan motor P1 Printed wiring board a1 Strong electric field a2 Weak power range
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Abstract
Description
<概要>
図2に、本実施形態に係る電源ユニット(10)の構成を概略的に示す。本実施形態に係る電源ユニット(10)は、冷凍装置の一例である空気調和装置(60)の室外機に搭載されている。電源ユニット(10)は、3相4線式の交流電源である商用電源(91)からの入力交流電力を受けて、空気調和装置(60)に含まれる構成部品である負荷を駆動させるための電力を供給するものである。
このような電源ユニット(10)は、図2に示すように、2枚のプリント基板、具体的には電源基板(20)及びノイズ除去用基板(40)を有する。電源基板(20)は、圧縮機モータ(92)及びファンモータ(93)と接続されている。電源基板(20)と商用電源(91)との間には、ノイズ除去用基板(40)が接続されている。
電源基板(20)は、コネクタ(21,22,23)と、4本の配線(31r,31s,31t,31n)と、第1電力生成回路(24)と、第2電力生成回路(25)と、制御回路(26)と、第1コモンモードチョークコイル(27)と、第2コモンモードチョークコイル(28)とを有する。これらは、図3に示すように、平面視において概ね矩形状のプリント配線板(P1)に実装されている。
コネクタ(21,22,23)は、電源基板(20)を他機器及び他基板とハーネスによって電気的に繋ぐためのものである。図2に示すように、コネクタ(21)は、ノイズ除去用基板(40)に接続される入力端子であって、ノイズ除去用基板(40)を介して商用電源(91)と接続される。コネクタ(22)は、圧縮機モータ(92)に接続される出力端子である。コネクタ(23)は、ファンモータ(93)に接続される出力端子である。
入力端子であるコネクタ(21)には、4本の配線(31r,31s,31t,31n)が導通している。配線(31r,31s,31t)は、3相4線の商用電源(91)のR相、S相、T相それぞれに対応する3相配線である。配線(31n)は、3相4線の商用電源(91)の中性点に対応する中性点配線である。これらの配線(31r,31s,31t,31n)は、図3では図示していないが、プリント配線板(P1)上において、例えば銅等の金属箔によって形成されている。
第1電力生成回路(24)は、商用電源(91)からの入力交流電力に基づいて3相の第1出力電力を生成する。
第2電力生成回路(25)は、商用電源(91)からの入力交流電力に基づいて単相の第2出力電力を生成する。
制御回路(26)は、メモリ及びCPU等の弱電部品で構成されている。メモリに記憶されているプログラムをCPUが読み出して実行することで、制御回路(26)は、電源ユニット(10)が搭載されている空気調和装置(60)の冷媒制御を行う。冷媒制御には、図4に係る四方切換弁(72)の切換制御等が含まれる。
第1コモンモードチョークコイル(27)は、1つのコア材(例えばフェライトコア)に3本の導線を巻いた構造を有する、3線式のコモンモードチョークコイルである。そのため、第1コモンモードチョークコイル(27)は、6端子を有する。
第2コモンモードチョークコイル(28)は、1つのコア材(例えばフェライトコア)に2本の導線を巻いた構造を有する、単相即ち2線式のコモンモードチョークコイルである。そのため、第2コモンモードチョークコイル(28)は、4端子を有する。
ここで、図3を用いて、電源基板(20)に実装された各種回路(24,25,26)及び部品(27,28)のレイアウトについて説明する。なお、図3では、プリント配線板(P1)に実装されるコネクタ(21~23)及び各配線パターンについては図示を省略している。
図2に示すように、ノイズ除去用基板(40)は、2つのコネクタ(41,42)と、4本の配線(51r,51s,51t,51n)と、1つの第3コモンモードチョークコイル(43)とを有する。これらは、上記電源基板(20)とは別の、概ね矩形平板状のプリント配線板に実装されている。
コネクタ(41,42)は、ノイズ除去用基板(40)を商用電源(91)及び電源基板(20)とハーネスによって電気的に繋ぐためのものである。コネクタ(41)は、商用電源(91)に接続される入力端子であって、コネクタ(42)は、電源基板(20)に接続される出力端子である。
上記コネクタ(41)には、4本の配線(51r,51s,51t,51n)が導通している。配線(51r,51s,51t)は、3相4線の商用電源(91)のR相、S相、T相それぞれに対応する配線であって、配線(51n)は、3相4線の商用電源(91)の中性点に対応する配線である。これらの配線(51r,51s,51t,51n)は、プリント配線板上に例えば銅等の金属箔によって形成されている。
第3コモンモードチョークコイル(43)は、1つのコア材(例えばフェライトコア)に4本の導線を巻いた構造を有する、4線式のコモンモードチョークコイルである。そのため、第3コモンモードチョークコイル(43)は、8端子を有する。
上記電源ユニット(10)は、空気調和装置(60)の室外機内部に含まれる。ここでは、空気調和装置(60)の室外機における電源ユニット(10)の配置位置について、図4及び図5を用いて説明する。
本実施形態の電源基板(20)には、4線式のコモンモードチョークコイルが設けられるのではなく、第1電力生成回路(24)に対応する3線式の第1コモンモードチョークコイル(27)と、第2電力生成回路(25)に対応する単相即ち2線式の第2コモンモードチョークコイル(28)とが設けられる。第1コモンモードチョークコイル(27)は、コネクタ(21)と第1電力生成回路(24)との間において、3相配線(31r,31s,31t)に接続され、第2コモンモードチョークコイル(28)は、コネクタ(21)と第2電力生成回路(25)との間において、3相配線(31r,31s,31t)のうちの1相であるS相配線(31s)と中性点配線(31n)とに接続されている。
電源ユニット(10)は、空気調和装置を含む冷凍装置以外の装置に搭載することができる。また、電源ユニット(10)が冷凍装置に搭載される場合、室外機ではなく室内機に搭載されてもよい。
20 電源基板
21 コネクタ(入力端子)
24 第1電力生成回路
25 第2電力生成回路
27 第1コモンモードチョークコイル
28 第2コモンモードチョークコイル
31r,31s,31t 3相配線
31n 中性点配線
40 ノイズ除去用基板
43 第3コモンモードチョークコイル
60 空気調和装置(冷凍装置)
61 室外機ケーシング(ケーシング)
63a 側板の右側部分(開閉部)
75 冷媒配管(冷却部)
91 商用電源(交流電源)
92 圧縮機モータ
93 ファンモータ
P1 プリント配線板
a1 強電領域
a2 弱電領域
Claims (8)
- 複数の負荷(92,93)それぞれに互いに異なる電力を供給する電源基板(20)であって、
3相4線式の交流電源(91)に接続される入力端子(21)と、
上記入力端子(21)と導通する3相配線(31r,31s,31t)及び中性点配線(31n)と、
上記交流電源(91)からの入力交流電力に基づいて3相の第1出力電力を生成する第1電力生成回路(24)と、
上記入力交流電力に基づいて単相の第2出力電力を生成する第2電力生成回路(25)と、
上記入力端子(21)と上記第1電力生成回路(24)との間において上記3相配線(31r,31s,31t)に接続され、該3相配線(31r,31s,31t)を介して上記第1電力生成回路(24)に供給される上記入力交流電力に対しコモンモードノイズ成分を低減させる3線式の第1コモンモードチョークコイル(27)と、
上記入力端子(21)と上記第2電力生成回路(25)との間において上記3相配線(31r,31s,31t)のうちいずれか1相である所定配線(31s)及び上記中性点配線(31n)に接続され、該所定配線(31s)及び該中性点配線(31n)を介して上記第2電力生成回路(25)に供給される上記入力交流電力に対しコモンモードノイズ成分を低減させる2線式の第2コモンモードチョークコイル(28)と
を備えることを特徴とする電源基板。 - 請求項1において、
上記第1電力生成回路(24)、上記第2電力生成回路(25)、上記第1コモンモードチョークコイル(27)及び上記第2コモンモードチョークコイル(28)が実装されるプリント配線板(P1)、
を更に備え、
上記プリント配線板(P1)は、平面視において四角形状であって、
上記プリント配線板(P1)は、平面視において、上記プリント配線板(P1)の第1辺(P1a)と該第1辺(P1a)に対向する第2辺(P1b)との間に、
上記第1電力生成回路(24)と上記第1出力電力よりも小さい上記第2出力電力を生成する上記第2電力生成回路(25)とが、上記第1電力生成回路(24)が上記第2電力生成回路(25)よりも上記第1辺(P1a)側となるように実装される強電領域(a1)と、
上記強電領域(a1)よりも上記第2辺(P1b)側に位置する弱電領域(a2)と
を有し、
上記強電領域(a1)には、上記第2コモンモードチョークコイル(28)が上記第1コモンモードチョークコイル(27)よりも上記弱電領域(a2)寄りとなるように、上記第1コモンモードチョークコイル(27)と上記第2コモンモードチョークコイル(28)とが、更に実装されている
ことを特徴とする電源基板。 - 請求項1または請求項2において、
複数の上記負荷(92,93)は、冷凍装置(60)に含まれる圧縮機モータ(92)及びファンモータ(93)であって、
上記第1電力生成回路(24)は、上記第1出力電力を上記圧縮機モータ(92)に出力し、
上記第2電力生成回路(25)は、上記第2出力電力を上記ファンモータ(93)に出力する
ことを特徴とする電源基板。 - 冷媒回路を有する冷凍装置(60)であって、
請求項1から請求項3のいずれか1項に記載の電源基板(20)と、
上記電源基板(20)の上記第1電力生成回路(24)及び上記第2電力生成回路(25)それぞれに含まれるインバータ(24d,25d)を、上記冷媒回路に使用される冷媒を用いて冷却する冷却部(75)と
を備える
ことを特徴とする冷凍装置。 - 請求項4において、
複数の上記負荷(92,93)及び上記電源基板(20)を収容するケーシング(61)、
を更に備え、
上記ケーシング(61)は、該ケーシング(61)内部を開放可能な開閉板を有し、
上記電源基板(20)は、上記ケーシング(61)内部のうち上記開閉板に対応する位置に配置されている
ことを特徴とする冷凍装置。 - 請求項1から請求項3のいずれか1項に記載の電源基板(20)と、
上記交流電源(91)と上記電源基板(20)との間に接続されたノイズ除去用基板(40)と
を備え、
上記ノイズ除去用基板(40)は、上記入力交流電力に対しコモンモードノイズ成分を低減させる4線式の第3コモンモードチョークコイル(43)を有し、
上記電源基板(20)の上記第1コモンモードチョークコイル(27)及び上記第2コモンモードチョークコイル(28)には、上記入力交流電力が、上記ノイズ除去用基板(40)の上記第3コモンモードチョークコイル(43)を介して供給される
ことを特徴とする電源ユニット。 - 冷媒回路を有する冷凍装置(60)であって、
請求項6に記載の電源ユニット(10)と、
上記電源ユニット(10)における上記電源基板(20)の上記第1電力生成回路(24)及び上記第2電力生成回路(25)それぞれに含まれるインバータ(24d,25d)を、上記冷媒回路に使用される冷媒を用いて冷却する冷却部(75)と
を備える
ことを特徴とする冷凍装置。 - 請求項7において、
複数の上記負荷(92,93)及び上記電源ユニット(10)を収容するケーシング(61)、
を更に備え、
上記ケーシング(61)は、該ケーシング(61)内部を開放可能な開閉板を有し、
上記電源ユニット(10)における上記電源基板(20)は、上記ケーシング(61)内部のうち上記開閉板に対応する位置に配置されている
ことを特徴とする冷凍装置。
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EP3576279A1 (en) | 2019-12-04 |
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