WO2021166356A1 - 送電装置 - Google Patents
送電装置 Download PDFInfo
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- WO2021166356A1 WO2021166356A1 PCT/JP2020/044032 JP2020044032W WO2021166356A1 WO 2021166356 A1 WO2021166356 A1 WO 2021166356A1 JP 2020044032 W JP2020044032 W JP 2020044032W WO 2021166356 A1 WO2021166356 A1 WO 2021166356A1
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- power
- frequency
- control
- converter
- controller
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Classifications
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- 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
- H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
- H02J50/10—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling
- H02J50/12—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling of the resonant type
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
- B60L53/10—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles characterised by the energy transfer between the charging station and the vehicle
- B60L53/12—Inductive energy transfer
- B60L53/122—Circuits or methods for driving the primary coil, e.g. supplying electric power to the coil
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- 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
- H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
- H02J50/80—Circuit arrangements or systems for wireless supply or distribution of electric power involving the exchange of data, concerning supply or distribution of electric power, between transmitting devices and receiving devices
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- 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
- H02J2310/00—The network for supplying or distributing electric power characterised by its spatial reach or by the load
- H02J2310/40—The network being an on-board power network, i.e. within a vehicle
- H02J2310/48—The network being an on-board power network, i.e. within a vehicle for electric vehicles [EV] or hybrid vehicles [HEV]
Definitions
- This disclosure relates to a power transmission device.
- a non-contact power supply system that transmits power in a non-contact (wireless) manner is known.
- the non-contact power supply system includes a power transmission device including a power transmission coil and a power reception device including a power reception coil, and realizes non-contact power transmission by utilizing electromagnetic induction or magnetic field resonance between the coils. If the frequency used for power transmission (inverter switching frequency) interferes with the frequency used by other equipment, noise or the like may affect other equipment due to power transmission.
- the inverter frequency overlaps with the used frequency band after the inverter frequency is adjusted to the frequency corresponding to the power command value, the inverter frequency does not overlap with the used frequency band. It will be modified as. Then, the PFC output is increased by the decrease in the output power due to the change in the inverter frequency, and the output power value is adjusted to the power command value. Therefore, it may take a long time for the output power value to be adjusted to the power command value.
- This disclosure describes a power transmission device capable of shortening the time required for the power value of the target power to be adjusted to the power command value while suppressing interference with other devices.
- the power transmission device is a device for supplying electric power to a power receiving device connected to a load.
- This power transmission device includes a first coil for transmitting power to the second coil of the power receiving device in a non-contact manner, and a DC AC converter that converts DC power into AC power and supplies AC power to the first coil. It includes a converter and a controller that brings the power value of the target power closer to the power command value by frequency control that changes the frequency of the AC power.
- the target power is DC power or AC power.
- the controller performs constant power control to maintain the power value in accordance with the power command value. However, frequency change processing is performed to change the frequency so that the frequency is different from the frequency band used.
- FIG. 1 is a diagram showing an application example of a contactless power supply system including a power transmission device according to an embodiment.
- FIG. 2 is a circuit block diagram of the non-contact power supply system of FIG.
- FIG. 3 is a diagram showing the frequency characteristics of the load power.
- FIG. 4 is a diagram showing an example of a circuit configuration of a DC / AC converter.
- FIG. 5 is a flowchart showing a series of processes of power control performed by the first controller of FIG.
- FIG. 6 is a flowchart showing in detail an example of the frequency change process of FIG.
- FIG. 7 is a diagram for explaining the power control of FIG.
- FIG. 8 is a flowchart showing in detail another example of the frequency change process of FIG.
- FIG. 9 is a diagram for explaining power control including the frequency change process of FIG.
- FIG. 10 is a circuit block diagram of a non-contact power feeding system including a power transmission device according to a modified example.
- the power transmission device is a device for supplying electric power to a power receiving device connected to a load.
- This power transmission device includes a first coil for transmitting power to the second coil of the power receiving device in a non-contact manner, and a DC AC converter that converts DC power into AC power and supplies AC power to the first coil. It includes a converter and a controller that brings the power value of the target power closer to the power command value by frequency control that changes the frequency of the AC power.
- the target power is DC power or AC power.
- the controller performs constant power control to maintain the power value in accordance with the power command value.
- frequency change processing is performed to change the frequency so that the frequency is different from the frequency band used.
- frequency change processing is performed.
- the frequency of the AC power is changed so that the frequency of the AC power is different from the frequency band used while the constant power control is performed to maintain the power value of the target power in accordance with the power command value. Be changed.
- the state in which the power value of the target power is adjusted to the power command value is maintained. Therefore, even if the frequency of the AC power is changed after the power value of the target power reaches the power command value, the power value of the target power is adjusted to the power command value. As a result, it is possible to shorten the time required for the power value of the target power to be adjusted to the power command value while suppressing interference with other devices.
- the controller performs at least one of voltage control for changing the voltage of DC power, phase shift control for the DC AC converter, and impedance control for controlling the impedance between the DC AC converter and the first coil together with frequency control.
- the frequency change process may be performed.
- the voltage of the DC power, the phase shift amount of the DC AC converter, or the impedance between the DC AC converter and the first coil is changed, the frequency characteristic of the target power changes. Therefore, the frequency of the AC power is changed in order to maintain the state in which the power value of the target power is adjusted to the power command value. This makes it possible to set the frequency of the AC power to a frequency different from the frequency band used.
- the controller may perform frequency change processing by performing voltage control together with frequency control.
- the frequency characteristics of the target power change. Therefore, the frequency of the AC power is changed in order to maintain the state in which the power value of the target power is adjusted to the power command value. This makes it possible to set the frequency of the AC power to a frequency different from the frequency band used.
- the controller may perform voltage control by increasing the voltage.
- the voltage of the DC power is adjusted in order from the lowest voltage, the voltage of the DC power when the frequency of the AC power is changed to a frequency different from the frequency band used can be lowered. This makes it possible to improve the power transmission efficiency between the first coil and the second coil.
- the controller may perform frequency change processing by performing phase shift control together with frequency control.
- the phase shift amount of the DC / AC converter is changed, the frequency characteristic of the target power changes. Therefore, the frequency of the AC power is changed in order to maintain the state in which the power value of the target power is adjusted to the power command value. This makes it possible to set the frequency of the AC power to a frequency different from the frequency band used.
- the controller may perform frequency change processing by performing impedance control together with frequency control.
- the impedance between the DC / AC converter and the first coil is changed, the frequency characteristic of the target power changes. Therefore, the frequency of the AC power is changed in order to maintain the state in which the power value of the target power is adjusted to the power command value. This makes it possible to set the frequency of the AC power to a frequency different from the frequency band used.
- the controller may control the converter so that the voltage becomes constant.
- the frequency change process can be performed without increasing the withstand voltage of the DC AC converter.
- the controller selects either voltage control or phase shift control according to the frequency when the power value reaches the power command value, and performs frequency change processing by performing the selected control together with frequency control. You may. In this case, it is possible to shorten the time until the frequency of the AC power is set to a frequency different from the frequency band used.
- the adjustment range of the frequency of the AC power can be expanded, so that the frequency of the AC power can be set to a frequency different from the frequency band used more reliably.
- the controller selects either voltage control or impedance control according to the frequency when the power value reaches the power command value, and performs frequency change processing by performing the selected control together with frequency control. May be good. In this case, it is possible to shorten the time until the frequency of the AC power is set to a frequency different from the frequency band used.
- the adjustment range of the frequency of the AC power can be expanded, so that the frequency of the AC power can be set to a frequency different from the frequency band used more reliably.
- the controller may lower the power command value if the frequency cannot be changed to a frequency different from the frequency band used. In this case, by lowering the power command value, the frequency of the AC power can be changed to a frequency different from the frequency band used. Therefore, it is possible to more reliably suppress interference with other devices.
- FIG. 1 is a diagram showing an application example of a contactless power supply system including a power transmission device according to an embodiment.
- the non-contact power supply system 1 includes a power transmission device 2 and a power reception device 3, and is a system for supplying power from the power transmission device 2 to the power reception device 3.
- the power transmitting device 2 and the power receiving device 3 are separated from each other in the vertical direction, for example.
- the power transmission device 2 is installed in, for example, a parking lot or the like.
- the power receiving device 3 is mounted on, for example, an electric vehicle EV.
- the non-contact power feeding system 1 is configured to supply electric power to an electric vehicle EV arriving at a parking lot or the like by utilizing magnetic coupling between coils such as a magnetic field resonance method or an electromagnetic induction method.
- the non-contact power feeding method is not limited to the method using magnetic coupling, and may be, for example, an electric field resonance method.
- the power transmission device 2 is a device that supplies electric power for non-contact power supply.
- the power transmission device 2 generates a desired AC power from the power supplied by the power supply PS (see FIG. 2) and sends it to the power receiving device 3.
- the power transmission device 2 is installed on a road surface R such as a parking lot.
- the power transmission device 2 includes a first coil device 4 (power transmission coil device) provided so as to project upward from a road surface R such as a parking lot.
- the first coil device 4 includes a first coil 21 (see FIG. 2), and has, for example, a flat weight stand shape or a rectangular parallelepiped shape.
- the power transmission device 2 generates desired AC power from the power source PS.
- the generated AC power is sent to the first coil device 4, so that the first coil device 4 generates a magnetic flux.
- the power receiving device 3 is a device that receives power from the power transmitting device 2 and supplies power to the load L (see FIG. 2).
- the power receiving device 3 is mounted on, for example, an electric vehicle EV.
- the power receiving device 3 includes, for example, a second coil device 5 (power receiving coil device) attached to the bottom surface of a vehicle body (chassis or the like) of an electric vehicle EV.
- the second coil device 5 includes the second coil 31 (see FIG. 2) and faces the first coil device 4 in the vertical direction at the time of power supply.
- the second coil device 5 has, for example, a flat weight stand shape or a rectangular parallelepiped shape.
- the magnetic flux generated in the first coil device 4 interlinks with the second coil device 5, so that the second coil device 5 generates an induced current.
- the second coil device 5 receives the electric power from the first coil device 4 in a non-contact manner (wirelessly).
- the electric power received by the second coil device 5 is supplied to the load L.
- FIG. 2 is a circuit block diagram of the non-contact power supply system of FIG.
- the non-contact power supply system 1 is a system that receives AC power Pac1 from the power supply PS and supplies the load power Pout to the load L.
- the power supply PS is an AC power source such as a commercial power source, and supplies the AC power Pac1 to the power transmission device 2.
- the frequency of the AC power Pac1 is, for example, 50 Hz or 60 Hz.
- the load L may be a DC load such as a battery or an AC load such as a motor.
- the power transmission device 2 is supplied with AC power Pac1 from the power supply PS.
- the power transmission device 2 includes a first coil 21, a first converter 22 (converter), a first detector 23, a first communication device 24, a first controller 25 (controller), and a frequency detection used. It is equipped with a vessel 28.
- the first converter 22 is a circuit that converts the AC power Pac1 supplied from the power supply PS into a desired AC power Pac2 and supplies the AC power Pac2 to the first coil 21.
- the first converter 22 can change the magnitude (power value) of the DC power Pdc and the AC power Pac2 by, for example, frequency control, phase shift control, and voltage control of the DC power Pdc, which will be described later.
- the first converter 22 includes a power converter 26 and a DC / AC converter 27.
- the power converter 26 is an AC / DC converter (AC / DC converter) that converts the AC power Pac1 supplied from the power supply PS into the DC power Pdc.
- the power converter 26 is, for example, a rectifier circuit.
- the rectifier circuit may be composed of a rectifier element such as a diode or a switching element such as a transistor.
- the power converter 26 may further have a PFC (Power Factor Correction) function and a buck-boost function.
- the first converter 22 may further include a DC / DC converter provided at the output of the power converter 26.
- the power converter 26 is controlled by the first controller 25 so as to change the magnitude of the voltage Vdc of the DC power Pdc.
- the power converter 26 changes the magnitude of the voltage Vdc of the DC power Pdc by, for example, pulse width modulation.
- the power converter 26 supplies DC power Pdc to the DC AC converter 27.
- the DC AC converter 27 converts the DC power Pdc supplied from the power converter 26 into the AC power Pac2.
- the frequency of the AC power Pac2 is, for example, 81.38 kHz to 90 kHz.
- the DC / AC converter 27 includes, for example, an inverter circuit.
- the first converter 22 may further include a transformer provided at the output of the DC / AC converter 27.
- the DC AC converter 27 is controlled by the first controller 25 so as to change the magnitudes of the DC power Pdc and the AC power Pac2.
- the DC AC converter 27 supplies AC power Pac2 to the first coil 21.
- the first coil 21 is a coil for transmitting electric power to the power receiving device 3 (the second coil 31) in a non-contact manner.
- the first coil 21 generates magnetic flux by supplying AC power Pac2 from the first converter 22.
- a capacitor and an inductor may be connected between the first coil 21 and the first converter 22.
- the first detector 23 includes a circuit for acquiring a measured value related to the DC power Pdc.
- the circuit for acquiring the measured value with respect to the DC power Pdc is, for example, a voltage sensor, a current sensor, or a combination thereof.
- the first detector 23 measures the DC power Pdc, the voltage Vdc of the DC power Pdc, or the current Idc of the DC power Pdc.
- the first detector 23 measures the AC power Pac2, the voltage Vac2 of the AC power Pac2, and the current Iac2 of the AC power Pac2.
- the first detector 23 outputs the acquired measured value to the first controller 25.
- the first communication device 24 is a circuit for wirelessly communicating with the second communication device 34 of the power receiving device 3 described later.
- the first communication device 24 includes, for example, an antenna for a communication method using radio waves, a light emitting element for a communication method using an optical signal, and a light receiving element.
- the first communication device 24 outputs the information received from the power receiving device 3 to the first controller 25.
- the first controller 25 is a processing device such as a CPU (Central Processing Unit) and a DSP (Digital Signal Processor).
- the first controller 25 may have a ROM (Read Only Memory), a RAM (Random Access Memory), an interface circuit for connecting to each part of the power transmission device 2, and the like.
- the first controller 25 performs constant power control that brings the power value of the target power closer to the first power command value (power command value).
- the target power DC power Pdc or AC power Pac2 can be used.
- the first controller 25 calculates the first power measurement value based on the current Idc measurement value detected by the first detector 23.
- the target power is the DC power Pdc
- the first power measurement value includes the loss of the DC AC converter 27, the loss of the first coil 21, and the AC supplied from the DC AC converter 27 to the first coil 21. It is a measured value including the electric power Pac2.
- the first controller 25 calculates the first power command value, which is the target value of the DC power Pdc, based on the second power command value received from the power receiving device 3 via the first communication device 24.
- the first controller 25 first converts the first power measurement value (DC power Pdc) to approach the first power command value based on the first power measurement value and the first power command value. Power control is performed to control the device 22.
- the first power command value is the target value of the AC power Pac2 and is set according to the AC power Pac2. That is, the first controller 25 controls the first converter 22 so that the AC power Pac2 approaches the first power command value, which is the target value of the AC power Pac2, as the constant power control.
- the target power is the DC power Pdc
- the first controller 25 may perform command value correction control for correcting the first power command value.
- the first controller 25 receives a second power measurement value (described later) and a second power command value (described later) from the power receiving device 3 via the first communication device 24 as command value correction control.
- Power control is performed to control the first converter 22 so that the measured power value (load power Pout) approaches the second power command value.
- the first controller 25 corrects the first power command value so that the second power measurement value approaches the second power command value.
- the first controller 25 controls the magnitude (power value) of the DC power Pdc and the AC power Pac2 by controlling the first converter 22 as the power control, and the load power Pout supplied to the load L. Control the size.
- the power control is performed using at least one of frequency control, phase shift control, and voltage control of the DC power Pdc. In each control, the power control parameters for controlling the magnitudes of the DC power Pdc and the AC power Pac2 are changed.
- FIG. 3 is a diagram showing the frequency characteristics of the load power.
- the horizontal axis of the graph of FIG. 3 indicates the drive frequency f, and the vertical axis indicates the load power Pout (magnitude).
- the drive frequency f is the frequency of the AC power Pac2.
- the frequency of the AC power Pac2 is the frequency of the AC current or AC voltage output from the first converter 22.
- the frequency of the AC power Pac2 may be referred to as a “drive frequency f”.
- the magnitudes of the DC power Pdc, the AC power Pac2, and the load power Pout are changed according to the drive frequency f.
- the drive frequency f for example, 81.38 kHz to 90 kHz can be used.
- the impedance of the reactance element such as the coil and the capacitor changes, and the magnitudes of the DC power Pdc, the AC power Pac2, and the load power Pout change.
- the first controller 25 performs frequency control for changing the magnitude (power value) of the DC power Pdc, the AC power Pac2, and the load power Pout by changing the drive frequency f.
- the above-mentioned power control parameter in frequency control is the drive frequency f of the DC / AC converter 27 (inverter circuit).
- the drive frequency f is the frequency fb at the beginning.
- the load power Pout at this time is the power Pb.
- the drive frequency f is reduced from the frequency fb to the frequency fa.
- the drive frequency f is increased from the frequency fb to the frequency fc.
- the first controller 25 brings the load power Pout closer to the desired power by changing the drive frequency f as described above.
- the drive frequency f may be changed in step units.
- the size of one step for changing the drive frequency f is not particularly limited, and may be, for example, several Hz to several tens of Hz, and several tens of Hz to several hundred Hz.
- the step is determined by, for example, the clock resolution of the CPU, which is the first controller 25.
- the specific method of frequency control is not limited.
- the first controller 25 adjusts the switching frequency of each switching element by using the drive signal supplied to each switching element included in the inverter circuit. , The drive frequency f is changed.
- the switching element for example, FET (Field Effect Transistor) and IGBT (Insulated Gate Bipolar Transistor) are used, and in this case, a drive signal is applied to the gate of the switching element.
- the first controller 25 changes the phase shift amount of the DC AC converter 27 (inverter circuit) to change the magnitude (power value) of the DC power Pdc, the AC power Pac2, and the load power Pout.
- the first controller 25 supplies the drive signals Sa to Sd to the switching elements SWa to SWd included in the inverter circuit. By adjusting, the time during which each switching element SWa to SWd is turned on is adjusted.
- the energization period (on period) of the inverter circuit is It will be the longest.
- the more the drive time of the switching element SWa and the drive time of the switching element SWd deviate the more the drive time of the switching element SWb and the drive time of the switching element SWc deviate, the shorter the on period of the inverter circuit becomes.
- the shorter the ON period of the inverter circuit the smaller the DC power Pdc and the AC power Pac2.
- the above-mentioned power control parameter in the phase shift control is the phase shift amount.
- the phase shift amount is the amount of deviation between the drive time of the switching element SWa and the drive time of the switching element SWd (or the amount of deviation between the drive time of the switching element SWb and the drive time of the switching element SWc).
- the power control parameter described above in phase shift control is the on-period of the inverter circuit.
- the phase of the output voltage from the inverter circuit (voltage Vac2 of AC power Pac2) is the same as or advanced from the phase of the output current (current Iac2 of AC power Pac2) (inverter).
- the impedance of the entire load as seen from the circuit is inductive).
- the impedance of the entire load as seen from the inverter circuit (DC / AC converter 27) is the total impedance of the first coil 21, the second coil 31, the second converter 32, and the load L. Is. If the phase difference between the voltage and the current is the same, the impedance of the entire load seen from the inverter circuit becomes capacitive due to noise and control error.
- phase of the output current from the inverter circuit current Iac2 of AC power Pac2
- phase of the output voltage voltage Vac2 of AC power Pac2
- the impedance of the entire load seen from the inverter circuit is capacitive. .. Therefore, in order to ensure safety, the phase of the voltage is advanced beyond the phase of the current so that the phase difference does not become smaller than the predetermined value.
- This predetermined value is called a phase margin.
- the phase shift amount may be displayed as a percentage, for example, with the length of one cycle of the AC power Pac2 (that is, 360 degrees) as 100%. In this case, the phase shift amount is 0% when the phase shift is not performed at all. In the phase shift control, when the phase shift amount is 0%, the DC power Pdc and the AC power Pac2 are maximized, and the load power Pout is also maximized.
- the maximum value of the phase shift amount varies depending on the circuit characteristics of the first coil 21 (for example, the characteristics of the resonance circuit including the first coil 21 and the capacitor (not shown)), but is, for example, about 50%. That is, in one embodiment, the lower limit of the phase shift amount can be set to 0%. The upper limit of the phase shift amount can be set to 50%.
- the first controller 25 performs voltage control for changing the magnitude (power value) of the DC power Pdc, the AC power Pac2, and the load power Pout by changing the magnitude of the voltage Vdc of the DC power Pdc.
- the voltage Vdc of the DC power Pdc is changed by using, for example, the buck-boost function of the power converter 26 described above.
- the above-mentioned power control parameter in the voltage control of the DC power Pdc is the magnitude of the voltage Vdc of the DC power Pdc.
- the buck-boost function can be realized, for example, in a chopper circuit.
- the used frequency detector 28 is a circuit that detects the used frequency band, which is a frequency band used by another device different from the non-contact power supply system 1.
- the used frequency detector 28 detects the used frequency band by auto-scan, as in the case of automatic tuning of radios, for example.
- the frequency detector 28 used acquires the position information of the power transmission device 2 using GPS (Global Positioning System) or the like, and is assigned to other devices in the area including the position indicated by the position information.
- the frequency band may be detected as the used frequency band.
- the allocated frequency band for each region is preset in a memory (not shown).
- the used frequency detector 28 may use the harmonic component of the detected frequency band as the used frequency band.
- the used frequency detector 28 outputs the used frequency information indicating the used frequency band to the first controller 25.
- the user may set the frequency band used in the first controller 25. In this case, the power transmission device 2 does not have to include the working frequency detector 28.
- the power receiving device 3 includes a second coil 31, a second converter 32, a second detector 33, a second communication device 34, and a second controller 35.
- the second coil 31 is a coil for receiving electric power supplied from the power transmission device 2 in a non-contact manner.
- AC power Pac3 is generated in the second coil 31 by interlinking the magnetic flux generated by the first coil 21 with the second coil 31.
- the second coil 31 supplies the AC power Pac3 to the second converter 32.
- a capacitor and an inductor may be connected between the second coil 31 and the second converter 32.
- the second converter 32 is a circuit that converts the AC power Pac3 supplied from the second coil 31 into a desired load power Pout for the load L.
- the second converter 32 is an AC-DC converter (rectifier circuit) that converts the AC power Pac3 into the DC load power Pout.
- the second converter 32 may include a buck-boost function in order to output a load power Pout desired for the load L. This buck-boost function can be realized, for example, in a chopper circuit or a transformer.
- the second converter 32 may further include a transformer provided at the input of the AC / DC converter.
- the second converter 32 When the load L is an AC load, the second converter 32 further includes a DC AC converter (inverter circuit) in addition to the AC / DC converter that converts the AC power Pac3 into DC power.
- the DC-AC converter converts the DC power generated by the AC-DC converter into the AC load power Pout.
- the second converter 32 may further include a transformer provided at the input of the AC / DC converter.
- the second detector 33 is a circuit for acquiring a measured value regarding the load power Pout supplied to the load L.
- the second detector 33 measures the load voltage Vout, the load current Iout, or the load power Pout supplied to the load L.
- the second detector 33 is, for example, a voltage sensor, a current sensor, or a combination thereof.
- the second detector 33 outputs the acquired measured value to the second controller 35.
- the load L outputs the second power command value to the second controller 35.
- the second power command value indicates the amount of power desired to be supplied to the load L.
- the second power command value may be a current, voltage, or power command value determined according to the SOC (State Of Charge) of the load L.
- the second communication device 34 is a circuit for wirelessly communicating with the first communication device 24 of the power transmission device 2.
- the second communication device 34 allows the power receiving device 3 to communicate with the power transmission device 2.
- the second communication device 34 includes, for example, an antenna for a communication method using radio waves, a light emitting element for a communication method using an optical signal, and a light receiving element.
- the second communication device 34 transmits the information received from the second controller 35 to the power transmission device 2.
- the second controller 35 is a processing device such as a CPU and a DSP.
- the second controller 35 may include an interface circuit or the like connected to each part of the ROM, the RAM, and the power receiving device 3.
- the second controller 35 calculates the second power measurement value based on the measurement value received from the second detector 33.
- the second controller 35 transmits the second power measurement value and the second power command value received from the load L to the power transmission device 2 via the second communication device 34.
- a storage battery of an electric vehicle is connected to the power transmitting device 2 instead of the power PS, and a power PS is connected to the power receiving device 3 instead of the load L to transmit power from the power receiving device 3 to the power transmitting device 2. It is also possible to do.
- FIG. 5 is a flowchart showing a series of processes of power control performed by the first controller of FIG.
- FIG. 6 is a flowchart showing in detail an example of the frequency change process of FIG.
- FIG. 7 is a diagram for explaining the power control of FIG.
- the series of processes shown in FIG. 5 is started when the first controller 25 receives the second power command value from the power receiving device 3.
- the first controller 25 calculates the first power command value based on the second power command value received from the power receiving device 3 (step S1).
- the first controller 25 makes the second power measurement value closer to the second power command value. 1
- the power command value may be corrected.
- the case where the first power measurement value (DC power Pdc) is smaller than the first power command value will be described, but the same applies when the first power measurement value is larger than the first power command value.
- the power control ends without performing the subsequent processing.
- the first controller 25 sets the voltage Vdc (step S2). For example, when the power transmission device 2 is started, the first controller 25 uses the power converter 26 so that the voltage Vdc is the smallest voltage in the voltage range of the voltage Vdc that the power converter 26 can output. To control. The first controller 25 may control the power converter 26 so that the voltage Vdc becomes a predetermined voltage (for example, 420 V). When the power transmission device 2 is operating, the first controller 25 may be fixed at the voltage Vdc output by the power converter 26.
- a predetermined voltage for example, 420 V
- the frequency characteristic of the DC power Pdc is the characteristic C1 shown in FIG.
- the characteristics C1 to C4 shown in FIG. 7 are frequency characteristics of the DC power Pdc at different voltages Vdc.
- the frequency characteristics of the DC power Pdc are changed in the order of characteristic C1, characteristic C2, characteristic C3, and characteristic C4. In other words, as the voltage Vdc increases, the drive frequency f for obtaining the same DC power Pdc increases.
- the first controller 25 performs frequency control (step S3), and brings the first power measurement value closer to the first power command value by frequency control.
- the first power measurement value (power value of the DC power Pdc) changes along the characteristic C1.
- the drive frequency f before frequency control is set to the frequency at which the DC power Pdc is the smallest (for example, 90 kHz).
- the drive frequency f that has been used until immediately before may be used as it is.
- the first controller 25 gradually brings the first power measurement value closer to the first power command value by, for example, changing the drive frequency f in step units. In the frequency band in which the amount of change in the DC power Pdc with respect to the amount of change in the drive frequency f is small, the first controller 25 may increase the amount of change in the drive frequency f per step.
- the drive frequency f may be temporarily included in the used frequency band (in this example, the used frequency band FB2). be.
- the used frequency band FB2 since the time during which the drive frequency f is included in the used frequency band FB2 is relatively short, the influence on other devices is limited.
- the first controller 25 determines whether or not the first power measurement value has reached (matches) the first power command value (step S4). When it is determined that the first power measurement value does not reach the first power command value (does not match) (step S4; NO), the first controller 25 continues to perform frequency control in step S3. On the other hand, when it is determined that the first power measurement value has reached (matches) the first power command value (step S4; YES), the first controller 25 uses frequency band information from a memory (not shown). Is read out, and it is determined whether or not the frequency f0 of the drive frequency f is included in any of the used frequency bands (step S5). The frequency f0 is the drive frequency f when the power value of the DC power Pdc reaches the first power command value in the characteristic C1.
- step S5 When it is determined that the frequency f0 is not included in any of the used frequency bands (step S5; NO), a series of power control processes is completed. On the other hand, when it is determined in step S5 that the frequency f0 is included in any of the used frequency bands (step S5; YES), the first controller 25 sets the drive frequency f out of the used frequency band.
- the frequency change process (step S6) of the above is carried out.
- the frequency change process is a process of changing the drive frequency f to a frequency different from the frequency band used while performing constant power control by frequency control.
- the first controller 25 controls the voltage of the DC power Pdc while performing constant power control by frequency control (step S11). Specifically, the first controller 25 controls the power converter 26 so as to change the magnitude of the voltage Vdc. In step S2, when the voltage Vdc is set to the minimum voltage in the voltage range of the voltage Vdc that the power converter 26 can output, the first controller 25 increases the voltage Vdc. 26 is controlled. The first controller 25, for example, gradually changes the voltage Vdc in step units.
- the power value (first power measurement value) of the DC power Pdc is the first power when the drive frequency f is maintained at the frequency f0.
- the value will be different from the command value.
- the first controller 25 performs constant power control using frequency control, the power converter 26 is controlled so as to change the magnitude of the voltage Vdc, and the drive frequency f is changed. , The state in which the first power measurement value matches the first power command value is maintained.
- the first controller 25 determines whether or not the drive frequency f has become a frequency outside the used frequency band (step S12). When it is determined that the drive frequency f is not a frequency outside the use frequency band, that is, the drive frequency f is included in the use frequency band (step S12; NO), the first controller 25 changes the voltage Vdc. Is possible or not (step S13). For example, as shown in FIG. 7, when the voltage Vdc is increased from the minimum voltage in the voltage range of the voltage Vdc that can be output by the power converter 26, the voltage Vdc reaches the maximum voltage in the above voltage range. If not, the voltage Vdc can be further increased. In such a case, the first controller 25 determines that the voltage Vdc can be changed (step S13; YES), and performs the process of step S11 again.
- the frequency characteristic of the DC power Pdc is changed to the characteristic C2 by increasing the voltage Vdc.
- the drive frequency f when the power value of the DC power Pdc matches the first power command value is included in the used frequency band FB1. Therefore, the voltage Vdc is further increased.
- the first controller 25 determines that the voltage Vdc cannot be changed (step S13; NO), changes the first power command value (step S14), and performs the process of step S11 again. ..
- the first controller 25 changes (lowers) the first power command value so that the drive frequency f is set to a frequency outside the used frequency band within a range in which the voltage Vdc can be changed.
- step S12 when it is determined that the drive frequency f has become a frequency outside the used frequency band (step S12; YES), a series of power control processes is completed.
- the frequency characteristic of the DC power Pdc is changed to the characteristic C4 by increasing the voltage Vdc.
- the drive frequency f (frequency f1) when the power value of the DC power Pdc matches the first power command value is outside the used frequency band FB1.
- the load L is a battery
- the battery voltage (load voltage Vout) rises as the charging of the battery progresses.
- the frequency characteristic of the DC power Pdc changes, but the drive frequency f changes because the constant power control is performed by the frequency control.
- whether the drive frequency f rises or falls is determined according to the configuration of the resonance circuit and the like.
- the drive frequency f rises, the drive frequency f moves away from the used frequency band FB1.
- the first controller 25 may gradually raise the first power command value to the original value.
- the drive frequency f decreases, the drive frequency f approaches the use frequency band FB1.
- the first controller 25 further lowers the first power command value, so that the drive frequency f is included in the use frequency band FB1. You may not have it.
- the drive frequency f drops to some extent, even if the first power command value is the original value, it may be smaller than the lower limit frequency of the used frequency band FB1. Therefore, the first controller 25 may return the first power command value to the original value when the amount of decrease in the drive frequency f exceeds a preset threshold value.
- the drive frequency f (frequency f0) of the AC power Pac2 when the power value (first power measurement value) of the DC power Pdc reaches the first power command value is another device. If it is included in the used frequency band used by, frequency change processing is performed. In the frequency change process, the drive frequency f is changed so that the drive frequency f becomes a frequency different from the frequency band used, as well as constant power control for maintaining the state in which the power value of the DC power Pdc is matched with the first power command value. NS. As described above, once the power value of the DC power Pdc reaches the first power command value, the state in which the power value of the DC power Pdc is adjusted to the first power command value is maintained.
- the first controller 25 performs the frequency change process by performing the voltage control of the DC power Pdc together with the frequency control.
- the voltage Vdc of the DC power Pdc is changed, the frequency characteristic of the DC power Pdc changes. Therefore, the drive frequency f is changed in order to maintain the state in which the power value of the DC power Pdc is matched with the first power command value. This makes it possible to set the drive frequency f to a frequency different from the frequency band used.
- the first controller 25 sets the voltage Vdc to the minimum voltage in the voltage range that the power converter 26 can output. Therefore, the first controller 25 controls the voltage of the DC power Pdc by increasing the voltage Vdc in the frequency change process. In this case, since the voltage Vdc is increased in order from the lowest voltage, the voltage Vdc when the drive frequency f is changed to a frequency different from the used frequency band can be lowered. The lower the voltage Vdc, the higher the power transmission efficiency between the first coil 21 and the second coil 31. Therefore, it is possible to improve the power transmission efficiency between the first coil 21 and the second coil 31. By lowering the voltage Vdc, the possibility that the power transmission device 2 is destroyed can be reduced.
- the first controller 25 lowers the first power command value and performs frequency change processing. As a result, the drive frequency f can be changed to a frequency different from the frequency band used. Therefore, it is possible to more reliably suppress interference with other devices.
- the load power Pout may fluctuate.
- the load L is a battery
- the load voltage Vout fluctuates according to the SOC of the battery
- the load power Pout may also fluctuate.
- the first controller 25 performs constant power control after the power value of the DC power Pdc reaches the first power command value, it is possible to follow the transient response as described above.
- the non-contact power feeding system 1 is not limited to the electric vehicle EV, and may be applied to a moving body such as a plug-in hybrid vehicle and an underwater vehicle, or may be applied to a moving body other than the moving body.
- the first controller 25 may perform frequency change processing by performing phase shift control together with frequency control instead of voltage control of the DC power Pdc.
- the power control of the modified example will be described with reference to FIGS. 5, 8 and 9.
- FIG. 8 is a flowchart showing in detail another example of the frequency change process of FIG.
- FIG. 9 is a diagram for explaining power control including the frequency change process of FIG.
- the initial value of the phase shift amount of the DC / AC converter 27 is set to 0.
- steps S1 to S5 are the same as the power control steps S1 to S5 of the above embodiment.
- Vdc is set (fixed) to the minimum voltage in the voltage range that the power converter 26 can output
- the first controller 25 executes the frequency change process (step S6).
- the first controller 25 performs phase shift control of the DC AC converter 27 while performing constant power control by frequency control (step S21). Specifically, the first controller 25 changes the phase shift amount by adjusting the supply time of the drive signals Sa to Sd (see FIG. 4). Since the initial value of the phase shift amount is set to 0, the first controller 25 increases the phase shift amount. The first controller 25, for example, gradually changes the phase shift amount in step units.
- the power value (first power measurement value) of the DC power Pdc is the first when the drive frequency f is maintained at the frequency f0. 1
- the value will be different from the power command value.
- the phase shift amount is increased, the power value of the DC power Pdc decreases even if the DC AC converter 27 is driven at the same drive frequency f.
- the first controller 25 performs constant power control using frequency control, the first power measurement value is changed by changing (decreasing) the drive frequency f while changing the phase shift amount. 1 Maintain a state that matches the power command value.
- the first controller 25 determines whether or not the drive frequency f has become a frequency outside the used frequency band (step S22). When it is determined that the drive frequency f is not a frequency outside the use frequency band, that is, the drive frequency f is included in the use frequency band (step S22; NO), the first controller 25 changes the phase shift amount (step S22; NO). It is determined whether or not it is possible to increase (increase) (step S23). If the phase shift amount has not reached the maximum value, the phase shift amount can be further increased. In such a case, the first controller 25 determines that the phase shift amount can be changed (step S23; YES), and performs the process of step S21 again.
- the first controller 25 determines that the phase shift amount cannot be changed (step S23; NO), changes the first power command value (step S24), and repeats the process of step S21. conduct. For example, the first controller 25 lowers the first power command value so that the drive frequency f is set to a frequency outside the used frequency band within a range in which the phase shift amount can be changed.
- step S22 when it is determined that the drive frequency f has become a frequency outside the used frequency band (step S22; YES), a series of power control processes is completed.
- the frequency characteristic of the DC power Pdc is changed by increasing the phase shift amount.
- the drive frequency f (frequency f2) when the power value of the DC power Pdc matches the first power command value is the drive when the power value of the DC power Pdc matches the first power command value in the characteristic C1. It is smaller than the frequency f (frequency f0) and is outside the used frequency band FB1.
- the battery voltage (load voltage Vout) rises as the charging of the battery progresses.
- the frequency characteristic of the DC power Pdc changes, but the drive frequency f changes because the constant power control is performed by the frequency control.
- the drive frequency f decreases, the drive frequency f moves away from the used frequency band FB1.
- the first controller 25 may gradually reduce the phase shift amount.
- the drive frequency f rises, the drive frequency f approaches the use frequency band FB1. Therefore, the first controller 25 includes the drive frequency f in the use frequency band FB1 by further increasing the phase shift amount. It may not be possible.
- the same processing as in the above embodiment may be performed.
- the power transmission device 2 of the modified example also has the same effect as the power transmission device 2 according to the above embodiment.
- the first controller 25 controls the power converter 26 so that the voltage Vdc is constant.
- the voltage Vdc is set to a low voltage, such as the smallest voltage in the voltage range that the power converter 26 can output.
- the frequency change process can be performed without increasing the withstand voltage of the DC / AC converter 27.
- a switching element having a high withstand voltage is used as the switching element of the DC / AC converter 27, the on-resistance of the switching element becomes large, so that the loss in the DC / AC converter 27 increases. Therefore, by using a switching element having a low withstand voltage, it is possible to reduce a decrease in power efficiency of the power transmission device 2.
- the voltage Vdc By lowering the voltage Vac1 of the AC power Pac1, the voltage Vdc can be further lowered, but the voltage range of the voltage Vac1 becomes narrower.
- the power converter 26 can further reduce the voltage Vdc without narrowing the voltage range of the voltage Vac1 by further providing a DC-DC converter for step-down after the PFC circuit.
- the DC-DC converter for step-down can be omitted, so that the cost of the power transmission device 2 can be reduced.
- the voltage Vdc may be changed by about several V.
- the first controller 25 may perform frequency change processing by performing impedance control together with frequency control.
- a non-contact power supply system 1 including a power transmission device 2 of another modification will be described with reference to FIG.
- FIG. 10 is a circuit block diagram of a non-contact power feeding system including a power transmission device according to another modification.
- the non-contact power supply system 1 according to another modification is the non-contact power supply system 1 of the above-described embodiment in that the first converter 22 of the power transmission device 2 further includes an impedance converter 29. Mainly different from.
- the impedance converter 29 is provided between the DC / AC converter 27 and the first coil 21.
- the impedance converter 29 is a device for changing the impedance (impedance seen from the DC AC converter 27) between the DC AC converter 27 and the first coil 21.
- the impedance converter 29 may be, for example, a TMN (Tunable matching network). Since TMN is known, the description thereof will be omitted (see US Patent Application Publication No. 2019/0006883 and US Patent Application Publication No. 2019/0006885, etc.).
- the first converter 22 can change the magnitude (power value) of the DC power Pdc and the AC power Pac2 by impedance control in addition to frequency control, phase shift control, and voltage control of the DC power Pdc. That is, the power control performed by the first controller 25 is performed using at least one of frequency control, phase shift control, voltage control of DC power Pdc, and impedance control.
- the first controller 25 changes the magnitude of the impedance between the DC AC converter 27 and the first coil 21 to change the magnitude (power value) of the DC power Pdc, the AC power Pac2, and the load power Pout.
- the DC power Pdc and AC power Pac2 decrease as the impedance between the DC AC converter 27 and the first coil 21 increases, and the DC power decreases as the impedance between the DC AC converter 27 and the first coil 21 decreases.
- the power Pdc and the AC power Pac2 increase. Therefore, the above-mentioned power control parameter in impedance control is the magnitude of impedance between the DC / AC converter 27 and the first coil 21.
- the power control of another modification is different from the power control of the above modification in that impedance control is used instead of phase shift control. Therefore, detailed description thereof will be omitted.
- the power transmission device 2 of another modification also has the same effect as that of the power transmission device 2 according to the above modification.
- the impedance converter 29 may be provided between the second coil 31 and the second converter 32.
- the first controller 25 has either voltage control or phase shift control of the DC power Pdc according to the drive frequency f (frequency f0) when the power value of the DC power Pdc reaches the first power command value.
- the frequency change process may be performed by selecting the above and performing the selected control together with the frequency control. For example, it is assumed that the voltage Vdc is set to the minimum voltage in the voltage range that can be output by the power converter 26 and the phase shift amount is set to 0 before the frequency change processing is performed. In this case, in order to maintain the state in which the power value of the DC power Pdc is adjusted to the first power command value, the drive frequency f is increased in the frequency change processing by the power control and the frequency control of the DC power Pdc. Only the drive frequency f can be reduced in the frequency change processing by the phase shift control and the frequency control.
- the first controller 25 determines, for example, whether or not the power value of the DC power Pdc can be set as the first power command value, and the impedance of the entire load as seen from the DC AC converter 27 (inverter circuit) by phase shift control.
- the frequency characteristics of the DC power Pdc changed as the power transmission progressed, whether or not the power became capacitive (C load), whether or not there was an influence of noise such as EMC (Electromagnetic Compatibility) and malfunction due to phase shift control.
- one of the power control of the DC power Pdc and the phase shift control of the DC AC converter 27 is selected in consideration of each criterion such as whether the drive frequency f rises or falls.
- the impedance of the entire load as seen from the DC / AC converter 27 (inverter circuit) in this modification is the impedance converter 29, the first coil 21, the second coil 31, the second converter 32, and the load L. Is the total impedance of.
- the first controller 25 selects the voltage control of the DC power Pdc when the impedance of the entire load as seen from the DC AC converter 27 (inverter circuit) becomes capacitive.
- the first controller 25 selects the voltage control of the DC power Pdc when there is an influence of noise.
- the first controller 25 selects control in which the drive frequency f moves away from the used frequency band when the frequency characteristic of the DC power Pdc changes.
- the adjustment range of the drive frequency f can be widened, so that the drive frequency f can be set to a frequency different from the frequency band used more reliably. Further, it is possible to stabilize the charge control while reducing the influence of noise without performing the control to suppress the noise.
- the first controller 25 has either voltage control or impedance control of the DC power Pdc according to the drive frequency f (frequency f0) when the power value of the DC power Pdc reaches the first power command value.
- the frequency change process may be performed by selecting the above and performing the selected control together with the frequency control. For example, before the frequency change process is performed, the voltage Vdc is set to the minimum voltage in the voltage range that the power converter 26 can output, and the impedance between the DC AC converter 27 and the first coil 21 is set. It is assumed that it is set to the minimum value.
- the criteria for selecting the voltage control or the impedance control of the DC power Pdc are the same as the criteria for selecting the voltage control or the phase shift control of the DC power Pdc. This makes it possible to shorten the time until the drive frequency f is set to a frequency different from the frequency band used.
- the adjustment range of the drive frequency f can be widened, so that the drive frequency f can be set to a frequency different from the frequency band used more reliably. Further, it is possible to stabilize the charge control while reducing the influence of noise without performing the control to suppress the noise.
- the first controller 25 is at least one of voltage control of the DC power Pdc, phase shift control of the DC AC converter 27, and impedance control between the DC AC converter 27 and the first coil 21.
- the frequency change processing is performed by performing one with the frequency control.
- the voltage Vdc, the phase shift amount of the DC AC converter 27, or the impedance between the DC AC converter 27 and the first coil 21 is changed, the frequency characteristic of the DC power Pdc changes. Therefore, the drive frequency f is changed in order to maintain the state in which the power value of the DC power Pdc is matched with the first power command value. This makes it possible to set the drive frequency f to a frequency different from the frequency band used.
- the first controller 25 may control the first converter 22 so that the AC power Pac2 approaches the first power command value, which is the target value of the AC power Pac2, as the constant power control. good.
- the frequency characteristics of the AC power Pac2 are the same as the frequency characteristics of the DC power Pdc described above.
- the power control using the AC power Pac2 is the same as the power control using the DC power Pdc.
- Non-contact power supply system Power transmission device 3 Power receiving device 4 1st coil device 5 2nd coil device 21 1st coil 22 1st converter (converter) 23 1st detector 24 1st communication device 25 1st controller (control) 26 Power converter 27 DC AC converter 28 Frequency detector used 29 Impedance converter 31 Second coil 32 Second converter 33 Second detector 34 Second communication device 35 Second controller SWa Switching element SWb Switching element SWc Switching Element SWd Switching element EV Electric vehicle FB1 Operating frequency band FB2 Operating frequency band Idc Current Iout Load current L Load Pac1 AC power Pac2 AC power Pac3 AC power Pdc DC power Pout Load power PS Power supply R Road surface Sa Drive signal Sb Drive signal Sc Drive signal Sd drive signal Vdc voltage Vout load voltage
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Abstract
Description
本開示の一側面に係る送電装置は、負荷に接続された受電装置に電力を供給するための装置である。この送電装置は、受電装置の第2コイルに非接触で電力を伝送するための第1コイルと、直流電力を交流電力に変換するとともに交流電力を第1コイルに供給する直流交流変換器を含む変換器と、交流電力の周波数を変更する周波数制御によって、対象電力の電力値を電力指令値に近づける制御器と、を備える。対象電力は、直流電力又は交流電力である。制御器は、電力値が電力指令値に達した際の周波数が他の機器によって使用される使用周波数帯域に含まれる場合、電力値が電力指令値に合わされた状態を維持する電力一定制御を行いながら周波数が使用周波数帯域とは異なる周波数となるように周波数を変更する周波数変更処理を行う。
以下、本開示の実施形態について、図面を参照しながら説明する。なお、図面の説明において同一要素には同一符号が付され、重複する説明は省略される。
2 送電装置
3 受電装置
4 第1コイル装置
5 第2コイル装置
21 第1コイル
22 第1変換器(変換器)
23 第1検出器
24 第1通信器
25 第1制御器(制御器)
26 電力変換器
27 直流交流変換器
28 使用周波数検出器
29 インピーダンス変換器
31 第2コイル
32 第2変換器
33 第2検出器
34 第2通信器
35 第2制御器
SWa スイッチング素子
SWb スイッチング素子
SWc スイッチング素子
SWd スイッチング素子
EV 電気自動車
FB1 使用周波数帯域
FB2 使用周波数帯域
Idc 電流
Iout 負荷電流
L 負荷
Pac1 交流電力
Pac2 交流電力
Pac3 交流電力
Pdc 直流電力
Pout 負荷電力
PS 電源
R 路面
Sa 駆動信号
Sb 駆動信号
Sc 駆動信号
Sd 駆動信号
Vdc 電圧
Vout 負荷電圧
Claims (10)
- 負荷に接続された受電装置に電力を供給するための送電装置であって、
第1コイルであり、前記受電装置の第2コイルに非接触で前記電力を伝送するための前記第1コイルと、
直流電力を交流電力に変換するとともに前記交流電力を前記第1コイルに供給する直流交流変換器を含む変換器と、
前記交流電力の周波数を変更する周波数制御によって、対象電力の電力値を電力指令値に近づける制御器と、
を備え、
前記対象電力は、前記直流電力又は前記交流電力であり、
前記制御器は、前記電力値が前記電力指令値に達した際の前記周波数が他の機器によって使用される使用周波数帯域に含まれる場合、前記電力値が前記電力指令値に合わされた状態を維持する電力一定制御を行いながら前記周波数が前記使用周波数帯域とは異なる周波数となるように前記周波数を変更する周波数変更処理を行う、送電装置。 - 前記制御器は、前記直流電力の電圧を変更する電圧制御、前記直流交流変換器の位相シフト制御、及び前記直流交流変換器と前記第1コイルとの間のインピーダンスを制御するインピーダンス制御の少なくとも1つを前記周波数制御とともに行うことによって、前記周波数変更処理を行う、請求項1に記載の送電装置。
- 前記制御器は、前記電圧制御を前記周波数制御とともに行うことによって、前記周波数変更処理を行う、請求項2に記載の送電装置。
- 前記制御器は、前記電圧を増加させることによって、前記電圧制御を行う、請求項3に記載の送電装置。
- 前記制御器は、前記位相シフト制御を前記周波数制御とともに行うことによって、前記周波数変更処理を行う、請求項2に記載の送電装置。
- 前記制御器は、前記インピーダンス制御を前記周波数制御とともに行うことによって、前記周波数変更処理を行う、請求項2に記載の送電装置。
- 前記制御器は、前記電圧が一定となるように、前記変換器を制御する、請求項5又は請求項6に記載の送電装置。
- 前記制御器は、前記電力値が前記電力指令値に達した際の前記周波数に応じて、前記電圧制御及び前記位相シフト制御のいずれかを選択し、選択された制御を前記周波数制御とともに行うことによって、前記周波数変更処理を行う、請求項2に記載の送電装置。
- 前記制御器は、前記電力値が前記電力指令値に達した際の前記周波数に応じて、前記電圧制御及び前記インピーダンス制御のいずれかを選択し、選択された制御を前記周波数制御とともに行うことによって、前記周波数変更処理を行う、請求項2に記載の送電装置。
- 前記制御器は、前記周波数を前記使用周波数帯域とは異なる周波数に変更できない場合、前記電力指令値を下げる、請求項1~請求項9のいずれか一項に記載の送電装置。
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JP2022501633A JP7332025B2 (ja) | 2020-02-18 | 2020-11-26 | 送電装置 |
DE112020005181.1T DE112020005181T5 (de) | 2020-02-18 | 2020-11-26 | Leistungsübertrager |
US17/767,538 US20240079907A1 (en) | 2020-02-18 | 2020-11-26 | Power transmitter |
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Citations (5)
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JP2013128400A (ja) * | 2011-12-16 | 2013-06-27 | Tdk Corp | ワイヤレス給電装置、及び、ワイヤレス電力伝送システム |
JP2014014225A (ja) * | 2012-07-04 | 2014-01-23 | Honda Motor Co Ltd | 車両用電力伝送装置 |
JP2014507103A (ja) * | 2010-12-16 | 2014-03-20 | クアルコム,インコーポレイテッド | 無線エネルギー転送、および連続的な無線局信号の共存 |
WO2014118972A1 (ja) * | 2013-02-01 | 2014-08-07 | パイオニア株式会社 | 非接触給電装置、非接触給電方法及びコンピュータプログラム |
WO2017047454A1 (ja) * | 2015-09-17 | 2017-03-23 | 株式会社Ihi | 送電装置及び非接触給電システム |
-
2020
- 2020-11-26 DE DE112020005181.1T patent/DE112020005181T5/de active Pending
- 2020-11-26 JP JP2022501633A patent/JP7332025B2/ja active Active
- 2020-11-26 WO PCT/JP2020/044032 patent/WO2021166356A1/ja active Application Filing
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Patent Citations (5)
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JP2014507103A (ja) * | 2010-12-16 | 2014-03-20 | クアルコム,インコーポレイテッド | 無線エネルギー転送、および連続的な無線局信号の共存 |
JP2013128400A (ja) * | 2011-12-16 | 2013-06-27 | Tdk Corp | ワイヤレス給電装置、及び、ワイヤレス電力伝送システム |
JP2014014225A (ja) * | 2012-07-04 | 2014-01-23 | Honda Motor Co Ltd | 車両用電力伝送装置 |
WO2014118972A1 (ja) * | 2013-02-01 | 2014-08-07 | パイオニア株式会社 | 非接触給電装置、非接触給電方法及びコンピュータプログラム |
WO2017047454A1 (ja) * | 2015-09-17 | 2017-03-23 | 株式会社Ihi | 送電装置及び非接触給電システム |
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JPWO2021166356A1 (ja) | 2021-08-26 |
US20240079907A1 (en) | 2024-03-07 |
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