JP2015162965A - Power supply device - Google Patents

Abstract

Provided is a power feeding device capable of expanding the adjustment range of a voltage output from a power feeding device to a power storage device while suppressing an increase in physique and cost.
A power feeding device includes a contact power feeding mode in which power is supplied from an AC power supply to a power storage device through a connection terminal, a first rectifying unit, and a converter, a non-contact power receiving unit, a first rectifying unit, and A non-contact power supply mode in which power is supplied from the AC power supply 42 to the power storage device 40 via the converter 70 can be switched. The power feeding device further uses a force that uses the reactor 60a when power is supplied in the non-contact power supply mode so as to increase the maximum value that can be taken by the output voltage of the converter 70 when power is supplied in the non-contact power supply mode. The rate improvement operation is stopped, and the reactor 60a is configured to be divertable for increasing the output voltage.
[Selection] Figure 1

Description

  The present invention relates to a power supply apparatus configured to be able to supply power to an object to be supplied from an external AC power supply.

  As this type of power supply device, as can be seen in Patent Document 1 below, a configuration in which an AC power supply is contact-charged (conductive charging) from an AC power supply to a power storage device via a power receiving terminal, Inductive charging) is known. Specifically, this device includes a charger configured to be able to charge the power storage device from an AC power source via a power receiving terminal, and a non-contact power receiving unit configured to be able to receive power from the AC power source in a non-contact manner.

  The charger converts the AC voltage input from the power receiving terminal into a DC voltage and outputs the DC voltage, and converts the DC voltage output from the first rectification unit into an AC voltage to convert 1 of the insulation transformer. An inverter to be applied to the secondary winding, and a second rectifier that converts the AC voltage output from the secondary winding of the insulation transformer into a DC voltage and applies the DC voltage to the power storage device. The charger also includes a third rectification unit that converts the AC voltage output from the non-contact power reception unit into a DC voltage and outputs the DC voltage to the second rectification unit. According to such a structure, the 2nd rectification | straightening part used at the time of contact charge can be diverted as a part of structure requested | required at the time of non-contact charge. Thereby, the number of parts of the power feeding device can be reduced.

  Further, in the device described in Patent Document 1 below, a boosting reactor is provided in an electrical path that connects the output side of the third rectifying unit and the second rectifying unit. The DC voltage output from the third rectification unit can be boosted by the reactor and the switching element constituting the second rectification unit during non-contact charging.

Japanese Patent No. 4909446

  Here, at the time of non-contact charging, in order to appropriately control charging from the AC power supply to the power storage device, it is required to expand the adjustment range of the voltage output from the charger to the power storage device. However, if a configuration in which the boosting reactor is added to the power supply device in order to expand the adjustment range of the output voltage of the charger, the physique and cost of the power supply device are increased.

  The present invention has been made to solve the above-described problems, and the object thereof is to expand the adjustment range of the voltage output from the power supply apparatus to the power supply target while suppressing an increase in the physique and cost. It is to provide a power feeding device.

  In order to achieve the above object, the present invention is a power supply apparatus configured to be able to supply power to a power supply target (40) from an external AC power supply (41, 42), and is electrically connected to the AC power supply (41). Based on the connection terminal (11), the reactor (60a; 61a; 62a, 62b; 63a, 63b), the pair of terminals (T3, T4), and the power input from the connection terminal. An improvement switch (60b; 61c; 62e, 62f; provided to allow energy to be accumulated in the reactor by an operation and to release the energy accumulated in the reactor by an off operation and to be output from the pair of terminals. 63g, 63h), the rectification operation for converting the AC voltage input from the connection terminal into a DC voltage, and the rear by the ON / OFF operation of the improvement switch An input unit (50, 60; 50, 51, 60; 50, 61; 51, 62; 51, 63) configured to be able to execute a power factor improvement operation using a torque and a primary winding (71a, 72a; 74a) and a transformer (72; 74) having secondary windings (71b, 72b; 74b) as constituent parts, and a DC voltage output from the pair of terminals is converted into an AC voltage to convert the primary winding Conversion switches (St1, St2; Sa to Sd) provided so as to be applied to the output, and an output provided so as to be able to be applied to the power supply target by converting the AC voltage output from the secondary winding into a DC voltage. Non-contact from the AC power supply via a power conversion unit (70; 73) having a side rectification unit (70a, 70b; 75) and a power transmission coil (43a) electrically connected to the AC power supply (42). Receiving coil configured to receive power ( 1a), and a non-contact power receiving unit (20) connected to the input unit so that an AC voltage output from the power receiving coil can be converted into a DC voltage by a rectifying operation of the input unit, The power supply device operates the input unit and the power conversion unit, thereby supplying power to the power supply target from the AC power source via the connection terminal, the input unit, and the power conversion unit, By operating the input unit and the power conversion unit, it is possible to switch between a non-contact power supply mode in which power is supplied from the AC power source to the power supply target via the non-contact power reception unit, the input unit, and the power conversion unit. In addition, the power supply apparatus further sets a maximum value that can be taken by the output voltage of the output-side rectifier when the power is supplied in the non-contact power supply mode in the contact power supply mode. And in the non-contact power supply mode to increase the output voltage of the output side rectification unit to be higher than the maximum value that can be taken when the power conversion unit is operated and the non-contact power receiving unit is assumed to supply power to the power supply target. When power is supplied, the power factor improving operation using the reactor is stopped, and the reactor can be used for increasing the output voltage.

  In the above invention, when power is supplied in the non-contact power supply mode, the power factor improving operation using the reactor is stopped, and the reactor is used to increase the output voltage of the output side rectification unit. For this reason, the adjustment range of the output voltage of the power supply device can be expanded while suppressing an increase in the size and cost of the power supply device.

The whole block diagram of the vehicle-mounted electric power feeder concerning 1st Embodiment. The circuit diagram which shows the operation | movement aspect of the electric power feeder in contact electric power feeding mode. The circuit diagram which shows the operation | movement aspect of the electric power feeder in non-contact electric power feeding mode. The time chart which shows the operation | movement aspect of the electric power feeder in non-contact electric power feeding mode. The equivalent circuit of the 1st mode in non-contact electric supply mode. The equivalent circuit of the 2nd mode in non-contact electric supply mode. The equivalent circuit of the 3rd mode in non-contact electric supply mode. The whole block diagram of the vehicle-mounted electric power feeder concerning 2nd Embodiment. The whole block diagram of the vehicle-mounted electric power feeder concerning 3rd Embodiment. The whole block diagram of the vehicle-mounted electric power feeder concerning 4th Embodiment. The whole block diagram of the vehicle-mounted electric power feeder concerning 5th Embodiment. The whole block diagram of the vehicle-mounted electric power feeder concerning 6th Embodiment. The whole block diagram of the vehicle-mounted electric power feeder concerning 7th Embodiment.

(First embodiment)
Hereinafter, a first embodiment in which a power feeding device according to the present invention is embodied as a vehicle power feeding device will be described with reference to the drawings.

  As shown in FIG. 1, the vehicle includes a contact charger 10, a non-contact power receiving unit 20, a control device 30 that controls the contact charger 10, and a power storage device 40 as a power supply target. Yes. As the power storage device 40, for example, a storage battery (nickel metal hydride storage battery, lithium ion storage battery) or a large-capacity capacitor can be used.

  The contact charger 10 includes a connection terminal 11, a first rectifier 50, a PFC circuit 60, an insulating converter 70, and an LC filter 80. The connection terminal 11 is an interface for performing contact charging from an AC power supply 41 outside the vehicle. The connection terminal 11 is configured to be electrically connectable to a power outlet (not shown) of the AC power supply 41. In the present embodiment, the first rectification unit 50 corresponds to an “input-side rectification unit” or a “first input-side rectification unit”. Further, the converter 70 corresponds to a “power converter”.

  The first rectifying unit 50 performs a rectifying operation of converting the AC voltage input from the connection terminal 11 through the first and second terminals T1 and T2 into a DC voltage, and the first to fourth rectifying diodes 50a to 50d are connected. I have. Specifically, the cathode of the second rectifier diode 50b is connected to the anode of the first rectifier diode 50a, and the first terminal T1 is connected to the connection point of these diodes 50a and 50b. The cathode of the fourth rectifier diode 50d is connected to the anode of the third rectifier diode 50c, and the second terminal T2 is connected to the connection point of these diodes 50c and 50d. The cathode of the first rectifier diode 50a is connected to the cathode of the third rectifier diode 50c, and the anode of the second rectifier diode 50b is connected to the anode of the fourth rectifier diode 50d.

  The input side of the PFC circuit 60 is connected to the output side of the first rectifying unit 50. The PFC circuit 60 includes a reactor 60a, an improvement switching element 60b, an improvement diode 60c, a first capacitor 82a, and a first changeover switch 81a. In the present embodiment, an N-channel MOSFET is used as the improvement switching element 60b. The drain of the improvement switching element 60b is connected to the first end of the reactor 60a, and the connection point of the first and third rectifier diodes 50a and 50c is connected to the second end of the reactor 60a. The connection point of the second and fourth rectifier diodes 50b and 50d and the fourth terminal T4 of the PFC circuit 60 are connected to the source of the improvement switching element 60b. The anode of the improvement diode 60c is connected to the connection point between the reactor 60a and the improvement switching element 60b, and the third terminal T3 of the PFC circuit 60 is connected to the cathode. The third terminal T3 and the fourth terminal T4 are connected by a series connection body of a first capacitor 82a and a first changeover switch 81a. The first changeover switch 81a has a function of electrically connecting a pair of main terminals (input / output terminals) by an ON operation and electrically disconnecting a pair of main terminals by an OFF operation. Here, as the first changeover switch 81a, for example, a semiconductor switching element (for example, a voltage control type switching element, more specifically, a MOSFET) may be used.

  The input side of the converter 70 is connected to the third and fourth terminals T3 and T4 of the PFC circuit 60. The converter 70 is a push-pull type converter including first and second conversion switching elements St1 and St2, first and second transformers 71 and 72, and first and second conversion diodes 70a and 70b. The converter 70 has a function of converting an input DC voltage into a predetermined DC voltage and outputting it. In the present embodiment, N-channel MOSFETs are used as the conversion switching elements St1 and St2.

  The first terminal of the first primary winding 71a constituting the first transformer 71 (insulating transformer) is connected to the third terminal T3, and the second terminal is connected via the first conversion switching element St1. A fourth terminal T4 is connected. The third terminal T3 is connected to the first end of the second primary winding 72a that constitutes the second transformer 72 (insulating transformer), and the second end is connected via the second conversion switching element St2. A fourth terminal T4 is connected. The first terminal of the first secondary winding 71b constituting the first transformer 71 is connected to the fifth terminal T5, and the second terminal is connected to the cathode of the first conversion diode 70a. A sixth terminal T6 is connected to the anode of the first conversion diode 70a. The fifth terminal T5 is connected to the first end of the second secondary winding 72b constituting the second transformer 72, and the cathode of the second conversion diode 70b is connected to the second end. The sixth terminal T6 is connected to the anode of the second conversion diode 70b. In this embodiment, each of the conversion diodes 70a and 70b constitutes an “output rectifier”.

  Here, in this embodiment, when a voltage having a positive polarity is applied to the first end of the first primary winding 71a, the polarity of the first end of the first secondary winding 71b is The first transformer 71 is configured to be positive. In addition, when a voltage having a positive polarity is applied to the second end side of the second primary winding 72a, the second end of the second secondary winding 72b is set to have a positive polarity. Two transformers 72 are configured. Further, the number of turns N1 between the first windings 71a and 72a is set to be the same, and the number of turns N2 between the second windings 71b and 72b is also set to be the same. The number of turns N1 of each first winding 71a, 72a is set higher than the number of turns N2 of each second winding 71b, 72b. Thereby, converter 70 has a function of stepping down and outputting the input voltage.

  The positive terminal of the power storage device 40 is connected to the fifth terminal T5 of the converter 70, and the negative terminal of the power storage device 40 is connected to the sixth terminal T6. An LC filter 80 having a filter reactor 80a and a filter capacitor 80b is provided between the output side of the converter 70 and the power storage device 40.

  The fifth terminal T5 and the sixth terminal T6 are connected by a series connection body of the second capacitor 82b and the second changeover switch 81b. The second changeover switch 81b has the same function as the first changeover switch 81a. Here, as the second changeover switch 81b, for example, a semiconductor switching element may be used.

  The non-contact power reception unit 20 includes a power reception pad 21 and a filter 22. The power receiving pad 21 includes a power receiving coil 21a configured to be able to receive power from the AC power source 42 through a power transmitting coil 43a electrically connected to the AC power source 42 outside the vehicle. Here, for example, a configuration in which the power transmission coil 43a and the power reception coil 21a are magnetically coupled to each other so as to be able to receive power from the AC power source 42 without contact can be used. The power receiving pad 21 further includes a power receiving side resonance circuit. In the present embodiment, a capacitor 21b connected in parallel to the power receiving coil 21a is used as the power receiving side resonance circuit. The filter 22 removes noise from the alternating current output from the power receiving pad 21. The power transmission pad 43 includes a power transmission coil 43a and a power transmission resonance circuit. In this embodiment, the capacitor | condenser 43b connected in parallel with the power transmission coil 43a is used as a power transmission side resonance circuit.

  A first terminal T1 is connected to the first end of the power receiving coil 21a via the filter 22 and a third changeover switch 81c (corresponding to an “input side switch”), and the filter 22 is connected to the second end of the power receiving coil 21a. The second terminal T2 is connected via The connection terminal 11 is connected to the first terminal T1 via the fourth changeover switch 81d. The third and fourth changeover switches 81c and 81d have the same function as the first changeover switch 81a. Here, as the third and fourth changeover switches 81c and 81d, for example, semiconductor switching elements may be used.

  The control device 30 operates the contact charger 10 to operate the power supply device in a contact power supply mode in which power is supplied from the AC power supply 41 to the power storage device 40 via the connection terminal 11. In addition, the control device 30 operates the contact charger 10 so as to operate the power supply device in a non-contact power supply mode in which power is supplied to the power storage device 40 from the AC power supply 42 via the non-contact power receiving unit 20. In the present embodiment, the contact power supply mode and the non-contact power supply mode are not executed simultaneously. For this reason, the control device 30 selects and executes one of these modes.

  The contact power supply mode will be described with reference to FIG. In FIG. 2, the improvement switching element 60b and the conversion switching elements St1 and St2 are illustrated in a simplified manner.

  In the contact power supply mode, the third changeover switch 81c is turned off and the fourth changeover switch 81d is turned on. As a result, the contactless power receiving unit 20 and the contact charger 10 are electrically disconnected. In this mode, the first changeover switch 81a is turned on and the second changeover switch 81b is turned off.

  On the premise of such an operation, a power factor improving operation is performed by an on / off operation of the improvement switching element 60b. Further, in order to control the output voltage of the converter 70 (the voltage applied from the fifth and sixth terminals T5 and T6 to the power storage device 40) to the target voltage, the first and second conversion switching elements St1 and St2 are alternately turned on and off. Performs step-down operation. Specifically, the lower the target voltage, the lower the duty ratio for each conversion switching element St1, St2. Here, the duty ratio is a ratio “Ton / Tsw” of the on operation time Ton to one cycle of the on / off operation of the switching element (switching cycle Tsw).

  Subsequently, the non-contact power supply mode will be described with reference to FIGS.

  In the present embodiment, the improvement switching element 60b is fixed to be turned off (that is, switching of the operation state of the improvement switching element 60b is stopped), and the power factor improvement operation of the PFC circuit 60 is stopped. The operation mode can be switched from the voltage type converter mode to the current type converter mode. Thereby, the converter 70 is given a boosting operation function. In the present embodiment, the converter 70 is not always operated in the current type converter mode during the period in which the non-contact power supply mode is performed, and the operation mode is changed when the controller 30 determines that there is a request for switching the operation mode during this period. Switch.

  In the non-contact power supply mode, as shown in FIG. 3, the third changeover switch 81c is turned on and the fourth changeover switch 81d is turned off. As a result, the AC power supply 41 and the contact charger 10 are electrically disconnected. In this mode, the first changeover switch 81a is turned off and the second changeover switch 81b is turned on. On the premise of such an operation, as shown in FIG. 4, the conversion switching elements St1 and St2 are operated in the first to third modes mode1 to mode3. Here, FIG. 4A shows the transition of the operation state of the first conversion switching element St1, and FIG. 4B shows the transition of the operation state of the second conversion switching element St2. FIG. 4C shows the transition of the terminal voltage Vt1 of the first secondary winding 71b, and FIG. 4D shows the transition of the terminal voltage Vt2 of the second secondary winding 72b. FIG. 4 (e) shows the transition of the current IL flowing through the reactor 60a.

  First, the first mode mode1 will be described. In FIG. 5, the output side of the first rectifying unit 50 is shown using the DC power supply 44. As shown in FIG. 5, the first mode mode1 is a mode in which the first conversion switching element St1 is turned on and the second conversion switching element St2 is turned off. In this mode, a closed circuit including the DC power supply 44, the reactor 60a, the first primary winding 71a, and the first conversion switching element St1 is formed on the primary side of the converter 70, and current flows through the closed circuit. . Thereby, on the secondary side of converter 70, a current flows from first secondary winding 71b to power storage device 40 side.

  Subsequently, as shown in FIG. 6, the second mode mode2 is a mode in which both the first and second conversion switching elements St1, St2 are turned on. In this mode, on the primary side of the converter 70, a closed circuit including the DC power supply 44, the reactor 60a, the first primary winding 71a and the first conversion switching element St1, the DC power supply 44, the reactor 60a, the second The primary winding 72a and the closed circuit including the second conversion switching element St2 are formed, and a current flows through these closed circuits. Thereby, magnetic energy is accumulated in the reactor 60a.

  Subsequently, as shown in FIG. 7, the third mode mode 3 is a mode in which the first conversion switching element St1 is turned off and the second conversion switching element St2 is turned on. In this mode, a closed circuit including the DC power supply 44, the reactor 60a, the second primary winding 72a, and the second conversion switching element St2 is formed on the primary side of the converter 70, and current flows through the closed circuit. . Thus, on the secondary side of converter 70, a current flows from second secondary winding 72b to power storage device 40 side.

  Thus, in the present embodiment, when the non-contact power supply mode is performed, the power factor improving operation of the PFC circuit 60 is stopped, and the converter 70 is operated as a current type converter using the reactor 60a configuring the PFC circuit 60. Can be made. For this reason, without adding a reactor for boosting, the PFC circuit 60 is allowed to perform power factor correction operation and the converter 70 is allowed to perform step-down operation so that the maximum output voltage of the converter 70 can be obtained in the non-contact power feeding mode. When power is supplied from the power receiving coil 21a to the power storage device 40 in a state where the power is present, the output voltage of the converter 70 can be increased from the maximum value that can be taken. Thereby, the adjustment range of the target output voltage of converter 70 can be expanded while suppressing an increase in the physique and cost of the power supply apparatus. Furthermore, in this embodiment, the boosting circuit interposed between the non-contact power receiving unit 20 and the power storage device 40 can be configured in one stage. For this reason, the loss in the contact charger 10 can be reduced, and as a result, the power transmission efficiency to the power storage device 40 in the non-contact power supply mode can be improved.

(Second Embodiment)
Hereinafter, the second embodiment will be described with reference to the drawings with a focus on differences from the first embodiment. FIG. 8 shows the configuration of the power supply apparatus according to the present embodiment. In FIG. 8, the same members as those shown in FIG. 1 are given the same reference numerals for the sake of convenience. Further, in FIG. 8, there are some members that are not shown in the figure for the same members as those shown in FIG.

  In the present embodiment, the filter 22 and the contact charger 10 are connected by a second rectifier 51 (corresponding to a “second input rectifier”) including fifth to eighth rectifier diodes 51a to 51d. . In the present embodiment, the second rectification unit 51 has the same configuration as the first rectification unit 50. The cathodes of the fifth and seventh rectifier diodes 51a and 51c are connected to the second end of the reactor 60a, and the anodes of the sixth and eighth rectifier diodes 51b and 51d are connected to the source of the improvement switching element 60b. ing. The second rectification unit 51 has a function of preventing current from flowing from the contact charger 10 side to the filter 22 side. Therefore, according to the present embodiment, the third changeover switch 81c shown in FIG. 1 can be removed from the power feeding apparatus.

(Third embodiment)
Hereinafter, the third embodiment will be described with reference to the drawings with a focus on differences from the first embodiment. FIG. 9 shows the configuration of the power supply apparatus according to the present embodiment. In FIG. 9, the same members as those shown in FIG. 1 are given the same reference numerals for the sake of convenience.

  In the present embodiment, the configuration of the PFC circuit is changed. Specifically, the PFC circuit 61 includes first and second reactors 61a and 61b, an improvement switching element 61c, and first and second improvement diodes 61d and 61e. In the present embodiment, the inductances of the reactors 61a and 61b are set to be the same.

  The drain of the improvement switching element 61c is connected to the first end of the first reactor 61a, and the connection point of the first and third rectifier diodes 50a and 50c is connected to the second end of the first reactor 61a. Yes. The connection point of the second and fourth rectifier diodes 50b and 50d is connected to the source of the improvement switching element 61c through the second reactor 61b. The connection point between the first reactor 61a and the improvement switching element 61c is connected to the anode of the first improvement diode 61d, and the cathode is connected to the third terminal T3. The node of the second reactor 61b and the improvement switching element 61c is connected to the anode of the second improvement diode 61e, and the cathode is connected to the fourth terminal T4.

  According to the present embodiment described above, the first and second reactors 61a and 61b can be used as a part of the current type converter in the non-contact power feeding mode.

(Fourth embodiment)
Hereinafter, the fourth embodiment will be described with reference to the drawings with a focus on differences from the first and second embodiments. FIG. 10 shows the configuration of the power supply apparatus according to the present embodiment. In FIG. 10, the same members as those shown in FIGS. 1 and 8 are given the same reference numerals for the sake of convenience.

  In the present embodiment, the configuration of the PFC circuit is changed. Specifically, the PFC circuit 62 includes first and second reactors 62a and 62b, first and second diodes 62c and 62d (corresponding to “first and second rectifying elements”), and first and second switching elements 62e. , 62f, a bridgeless PFC circuit. In the present embodiment, N-channel MOSFETs are used as the switching elements 62e and 62f.

  The drain of the first switching element 62e is connected to the anode of the first diode 62c, and the drain of the second switching element 62f is connected to the anode of the second diode 62d. The drain of the first diode 62c is connected to the drain of the second diode 62d, and the source of the first switching element 62e is connected to the source of the second switching element 62f. A third terminal T3 is connected to the cathodes of the first and second diodes 62c and 62d. A fourth terminal T4 is connected to the drains of the first and second switching elements 62e and 62f.

  The connection point between the first diode 62c and the first switching element 62e is connected to the first end of the first reactor 62a, and the second terminal of the first reactor 62a is connected to the first terminal T1. A first end of the second reactor 62b is connected to a connection point between the second diode 62d and the second switching element 62f, and a second terminal T2 is connected to a second end of the second reactor 62b.

  Next, the power factor improving operation of the PFC circuit 62 in the contact power supply mode according to the present embodiment will be described. In a period in which the output voltage of the AC power supply 41 has a positive polarity, the first switching element 62e is turned on / off under a situation where the second switching element 62f is turned on. On the other hand, in a period in which the output voltage of the AC power supply 41 has a negative polarity, the second switching element 62f is turned on / off under a situation where the first switching element 62e is turned on.

  Next, the non-contact power supply mode according to the present embodiment will be described. In this mode, the fourth changeover switch 81d is turned off. In this mode, the first switching element 62e is turned off and the second switching element 62f is turned on. Thereby, the 1st, 2nd reactor 62a, 62b can be diverted as a part of current type converter.

(Fifth embodiment)
Hereinafter, the fifth embodiment will be described with reference to the drawings with a focus on differences from the fourth embodiment. FIG. 11 shows the configuration of the power supply apparatus according to the present embodiment. In FIG. 11, the same members as those shown in FIG. 10 are given the same reference numerals for the sake of convenience.

  In the present embodiment, the configuration of the PFC circuit is changed. Specifically, the PFC circuit 63 includes first and second reactors 63a and 63b, first to fourth diodes 63c to 63f, and first and second switching elements 63g and 63h. In the present embodiment, N-channel MOSFETs are used as the switching elements 63g and 63h.

  The cathode of the second diode 63d is connected to the anode of the first diode 63c, and the cathode of the fourth diode 63f is connected to the anode of the third diode 63e. The cathode of the third diode 63e is connected to the cathode of the first diode 63c, and the anode of the fourth diode 63f is connected to the anode of the second diode 63d. A third terminal T3 is connected to the cathodes of the first and third diodes 63c and 63e. A fourth terminal T4 is connected to the anodes of the second and fourth diodes 63d and 63f.

  A first end of the first reactor 63a is connected to a connection point between the first diode 63c and the second diode 63d, and a first terminal T1 is connected to a second end of the first reactor 63a. The connection point between the third diode 63e and the fourth diode 63f is connected to the first end of the second reactor 63b, and the second terminal T2 is connected to the second end of the second reactor 63b. The first end of the first reactor 63a and the first end of the second reactor 63b are connected by a series connection body of first and second switching elements 63g and 63h. The drain of the second switching element 63h is connected to the source of the first switching element 63g.

  Subsequently, the power factor improving operation of the PFC circuit 63 in the contact power supply mode according to the present embodiment will be described. In both the period in which the output voltage of the AC power supply 41 has a positive polarity and the period in which it has a negative polarity, both the first and second switching elements 63g and 63h are simultaneously turned on / off to perform a power factor improving operation. Is called.

  Next, the non-contact power supply mode according to the present embodiment will be described. In this mode, both the first and second switching elements 63g and 63h are turned off. Thereby, the 1st, 2nd reactor 63a, 63b can be diverted as a part of current type converter.

(Sixth embodiment)
Hereinafter, the sixth embodiment will be described with reference to the drawings with a focus on differences from the first embodiment. FIG. 12 shows the configuration of the power supply apparatus according to this embodiment. In FIG. 12, the same members as those shown in FIG. 1 are given the same reference numerals for the sake of convenience.

  In the present embodiment, a full bridge converter is used as the converter. The converter 73 includes first to fourth conversion switching elements Sa to Sd, an insulating transformer 74, and a rectifier 75 (corresponding to an “output side rectifier”). In the present embodiment, N-channel MOSFETs are used as the conversion switching elements Sa to Sd.

  The source of the first conversion switching element Sa is connected to the drain of the second conversion switching element Sb, and the source of the third conversion switching element Sc is connected to the drain of the fourth conversion switching element Sd. Yes. The drain of the first conversion switching element Sa is connected to the drain of the third conversion switching element Sc, and the source of the second conversion switching element Sb is connected to the source of the fourth conversion switching element Sd. Yes. The first end of the primary winding 74a constituting the transformer 74 is connected to the connection point of the first and second conversion switching elements Sa and Sb, and the third end is connected to the second end of the primary winding 74a. The connection points of the fourth conversion switching elements Sc and Sd are connected. A rectifier 75 is connected to the second winding 74 b constituting the transformer 74. The rectifier 75 converts the AC voltage output from the second winding 74b into a DC voltage and outputs the DC voltage from the fifth and sixth terminals T5 and T6. In the present embodiment, the same rectifier 75 as that of the first rectifier 50 is used. Note that the number of turns N3 of the first winding 74a is set higher than the number of turns N4 of the second winding 74b.

  Next, the operation of the converter 73 in the contact power supply mode according to the present embodiment will be described. In the present embodiment, the output voltage of the converter 73 is switched by alternately turning on and off the set of the first and fourth conversion switching elements Sa and Sd and the set of the second and third conversion switching elements Sc and Sd. To the target voltage.

  Next, the non-contact power supply mode according to the present embodiment will be described.

  In this mode, the first and second conversion switching elements Sa and Sb are turned on and the third and fourth conversion switching elements Sc and Sd are turned off. The switching elements Sb and Sc are turned off and the first and fourth conversion switching elements Sa and Sd are turned on (or the first and fourth conversion switching elements Sa and Sd are turned off and the second By alternately repeating the second operation (which turns on the third conversion switching elements Sb and Sc), the output voltage of the converter 73 is controlled to the target voltage. Here, the higher the target voltage, the higher the duty ratio is set. In the present embodiment, the duty ratio is the ratio of the first operation time to the switching period (the total value of the first and second operation times).

  Also according to the present embodiment described above, the reactor 60a can be used as a part of the current type converter.

  In addition, you may employ | adopt what is demonstrated below as 1st, 2nd operation | movement in non-contact electric power feeding mode. Specifically, the first operation is an operation in which the first and second conversion switching elements Sa and Sb are turned off and the third and fourth conversion switching elements Sc and Sd are turned on. Further, the second operation is performed by turning off the first and fourth conversion switching elements Sa and Sd and turning on the second and third conversion switching elements Sb and Sc (or the first and fourth conversion elements). (The operation of turning on the conversion switching elements Sa and Sd and turning off the second and third conversion switching elements Sb and Sc).

(Seventh embodiment)
Hereinafter, the seventh embodiment will be described with reference to the drawings with a focus on differences from the first embodiment. FIG. 13 shows the configuration of the power supply apparatus according to this embodiment. In FIG. 13, the same members as those shown in FIG. 1 are given the same reference numerals for the sake of convenience.

  In the present embodiment, the first and second changeover switches 81a and 81b and the second capacitor 82b are removed from the power feeding apparatus. In such a configuration, in this embodiment, when the control device 30 determines that there is a request for switching the operation mode of the PFC circuit 60 in the non-contact power supply mode, the PFC circuit 60 is replaced with a power factor correction circuit and boosted. Function as a booster circuit. Specifically, the improvement switching element 60b is turned on and off to control the output voltage of the PFC circuit 60 (the voltage applied from the third and fourth terminals T3 and T4 to 70) to the target voltage. Here, the higher the target voltage of the PFC circuit 60, the higher the duty ratio for the improvement switching element 60b.

  According to such a configuration, since the input voltage of the converter 70 is increased, the maximum value that can be taken by the output voltage of the converter 70 can be increased. For this reason, the adjustment range of the output voltage of the converter 70 can be expanded without adding a reactor for boosting.

(Other embodiments)
Each of the above embodiments may be modified as follows.

  In FIG. 9 of the third embodiment, the second rectification unit 51 shown in FIG. 8 of the second embodiment may be applied. Specifically, in FIG. 9, the output side of the second rectification unit 51 may be connected between the first rectification unit 50 and the PFC circuit 60.

  In each of the above embodiments, the second changeover switch 81b may be removed, and the fifth and sixth terminals T5 and T6 may be directly connected by the second capacitor 82b. In this case, in the contact power supply mode, the second capacitor 82b plays a role of absorbing a surge voltage.

  The converter 70 in the second to fifth and seventh embodiments may be changed to the converter 73 in the sixth embodiment.

  In the seventh embodiment, when it is determined that there is a request for switching the operation mode in the non-contact power supply mode, the operation mode of the PFC circuit 60 is switched to the boost operation mode. Such switching may be applied to the power supply apparatus described in the second to sixth embodiments and other embodiments. Specifically, for example, when applied to the power feeding device shown in FIG. 10, in the non-contact power feeding mode, both the first and second switching elements 62e and 62f are turned on and only the first switching element 62e is turned on. The operation of alternately repeating the above may be referred to as a boost operation. Here, the ratio (duty ratio) of the ON operation time of only the first switching element 62e with respect to both ON operation times becomes the operation amount for controlling the target output voltage of the PFC circuit 62.

  In the fourth embodiment, each of the diodes 62c and 62d may be changed to a semiconductor switching element (for example, an N-channel MOSFET) capable of synchronous rectification.

  The power supply target of the AC power supply is not limited to the power storage device, and may be, for example, an in-vehicle electronic device (for example, a rotating machine). In addition, the power feeding device is not limited to that applied to a vehicle.

  DESCRIPTION OF SYMBOLS 11 ... Connection terminal, 20 ... Non-contact power reception part, 40 ... Power storage device, 41, 42 ... AC power supply, 50 ... 1st rectification part, 60 ... PFC circuit, 70 ... Converter.

Claims (13)

A power supply device configured to be able to supply power to a power supply target (40) from an external AC power supply (41, 42),
A connection terminal (11) configured to be electrically connectable to the AC power source (41);
Reactors (60a; 61a; 62a, 62b; 63a, 63b), a pair of terminals (T3, T4), and the power input from the connection terminals, the energy is accumulated in the reactor by the on operation, and the off operation And an improvement switch (60b; 61c; 62e, 62f; 63g, 63h) provided so that the energy accumulated in the reactor can be discharged and output from the pair of terminals. The input section (50, 60; 50, 50, 60, 50, 50, 50, 50, 50, 50, 50, 50, 50, 50, 50) 51, 60; 50, 61; 51, 62; 51, 63),
A transformer (72; 74) having a primary winding (71a, 72a; 74a) and a secondary winding (71b, 72b; 74b) as components, and a DC voltage output from the pair of terminals is converted into an AC voltage. Then, the conversion switches (St1, St2; Sa to Sd) provided so as to be applied to the primary winding, and the AC voltage output from the secondary winding are converted into a DC voltage to be the power supply target. A power conversion unit (70; 73) having an output side rectification unit (70a, 70b; 75) provided so as to be capable of being applied;
The power receiving coil (21a) is configured to be able to receive power from the AC power source in a non-contact manner via a power transmitting coil (43a) electrically connected to the AC power source (42), and is output from the power receiving coil. A non-contact power receiving unit (20) connected to the input unit so that an AC voltage can be converted into a DC voltage by a rectifying operation of the input unit;
With
The power supply device operates the input unit and the power conversion unit, thereby supplying power to the power supply target from the AC power source via the connection terminal, the input unit, and the power conversion unit, By operating the input unit and the power conversion unit, it is possible to switch between a non-contact power supply mode in which power is supplied from the AC power source to the power supply target via the non-contact power reception unit, the input unit, and the power conversion unit. And
The power supply device further operates the input unit and the power conversion unit in the contact power supply mode with a maximum value that can be taken by the output voltage of the output side rectification unit when power is supplied in the contactless power supply mode. However, in the case where power is supplied in the non-contact power supply mode in order to increase the output voltage of the output side rectifier when the power supply is assumed to be supplied from the non-contact power receiving unit, A power supply apparatus configured to stop a power factor improvement operation using a reactor so that the reactor can be used for increasing the output voltage.   When the power supply device is powered in the non-contact power supply mode, the conversion switch, the primary switch are turned on by turning on the conversion switch in a state where switching of the operation state of the improvement switch is stopped. Forming a closed circuit including a winding and the reactor to accumulate energy in the reactor based on electric power input from the power receiving coil to the input unit, and accumulating in the reactor by turning off the conversion switch The power feeding device according to claim 1, wherein the power boosting device is configured to be capable of executing a step-up operation that alternately repeats an operation of releasing the generated energy to the power feeding target side through the transformer. A change-over switch (81a) that electrically connects between both ends by an on operation and shuts off between both ends by an off operation;
A first capacitor (82a) connected in series to the changeover switch;
A second capacitor (82b) connected between a pair of terminals of the output side rectification unit;
Further comprising
The power feeding device according to claim 2, wherein the series connection body of the changeover switch and the capacitor is connected between a pair of terminals of the input unit.   The power supply device according to claim 3, wherein the power supply device is configured to supply power in the contact power supply mode in a state where the changeover switch is turned on, and to perform the boosting operation in a state where the changeover switch is turned off. The changeover switch is a first changeover switch,
A second changeover switch (81b) that electrically connects between both ends thereof by an on operation and shuts off between both ends by an off operation;
The power feeding device according to claim 3 or 4, wherein a series connection body of the second capacitor and the second changeover switch is connected between a pair of terminals of the output side rectification unit.   The power supply device supplies power in the contact power supply mode in a state where the first changeover switch is turned on and the second changeover switch is turned off, and the first changeover switch is turned off and the second changeover is performed. The power feeding device according to claim 5, wherein the boosting operation can be executed in a state where the switch is turned on.   The power feeding device forms a closed circuit including the improvement switch and the reactor by turning on the improvement switch when power is supplied in the non-contact power supply mode, and inputs from the power receiving coil to the input unit Instead of the step-up operation for alternately storing the operation for accumulating energy in the reactor based on the generated power and the operation for releasing the energy accumulated in the reactor by turning off the improvement switch. The power feeding device according to claim 1, wherein the power feeding device is configured to be executable. An input side switch (81c) that electrically connects between both ends by an on operation and shuts off between both ends by an off operation;
The power feeding device according to claim 1, wherein the non-contact power receiving unit and the input side of the input unit are connected via the input side switch.   The input unit includes a first input side rectifier unit (50) that converts an AC voltage input from the connection terminal into a DC voltage, and a second input side that converts the AC voltage output from the power receiving coil into a DC voltage. The power feeding device according to any one of claims 1 to 7, comprising a rectifying unit (51). The input unit includes an input side rectification unit (50) that performs a rectification operation for converting an AC voltage input from the connection terminal and an AC voltage output from the power receiving coil into a DC voltage; the reactor (60a); A step-up chopper circuit (60) having the improvement switch (60b) and the improvement diode (60c) connected in series to a reactor and connected to the output side of the input side rectifier to perform the power factor improvement operation And including
A pair of output sides of the input side rectification unit are connected via a series connection body of the reactor and the improvement switch,
The cathode of the improvement diode is connected to the high potential side terminal (T3) of the pair of terminals of the boost chopper circuit, and the anode is connected to the connection point of the reactor and the improvement switch,
The low potential side terminal (T4) of the pair of terminals of the step-up chopper circuit is connected to the opposite side of the both ends of the improvement switch to the side to which the reactor is connected. The power feeding device according to any one of claims. The reactor is a first reactor (61a),
The improvement diode is a first improvement diode (61d),
The step-up chopper circuit (61) further includes a second reactor (61b) and a second improvement diode (61e),
The opposite side of the improvement switch (61c) to the side where the first reactor is connected and the output side of the input side rectifier are connected by the second reactor,
The power feeding device according to claim 10, wherein the low potential side terminal is connected to an anode of the second improvement diode, and a connection point of the improvement switch and the second reactor is connected to a cathode. The input unit (62) includes a first reactor (62a) and a second reactor (62b) as the reactor, and a first improvement switch (62e) and a second improvement switch (62f) as the improvement switch. And a first rectifier element (62c) connected in series with the first improvement switch, and a second rectifier element (62d) connected in series with the second improvement switch,
The opposite side of the both ends of the first rectifying element to the side where the first improvement switch is connected, and the opposite side of the both ends of the second rectifying element to the side where the second improvement switch is connected Are connected to the high potential side terminal (T3) of the pair of terminals of the input unit,
Of the both ends of the first improvement switch, the opposite side to the side where the first rectification element is connected, and among the both ends of the second improvement switch, the side opposite to the side where the second rectification element is connected Are connected to a low potential side terminal (T4) of the pair of terminals of the input unit,
The first rectifying element allows a current to flow in a first direction from the first improvement switch to the high potential side terminal at both ends of the first rectifying element, and a current in a direction opposite to the first direction. Has the function of blocking the distribution of
The second rectifying element allows a current to flow in a second direction from the second improvement switch to the high potential side terminal at both ends of the second rectifying element, and a current in a direction opposite to the second direction. Has the function of blocking the distribution of
The connection terminal is connected to the connection point of the first improvement switch and the first rectifying element via the first reactor,
The power feeding device according to any one of claims 1 to 9, wherein the connection terminal is connected to a connection point between the second improvement switch and the second rectifying element via the second reactor.   The power feeding device according to claim 1, wherein the number of turns of the secondary winding is set lower than the number of turns of the primary winding.

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