JP2013070535A - Wireless power supply adaptable electric power supply apparatus, electric power tool, charger, and electrical machine - Google Patents

Abstract

Provided is a power supply device capable of extending the drive time of a target device even in an environment without a commercial power supply as compared with the conventional one.
A signal transmitted from a transmission antenna of a transmission apparatus is received by a reception antenna, converted into AC power by a signal reception unit, and power measurement is performed by a power measurement unit. When the measured power or voltage is higher than the threshold value, the power feeding control unit 17 sets the connection destination by the switching unit 31 to the AC / DC converter 14 side. The AC signal (power) of the signal receiving unit 19 is converted to DC power by the AC / DC converter 14, then converted to AC voltage by the inverter 13, and output to the output terminal 11 of the output plug 12. On the other hand, when the power measured by the power measuring unit 18 is lower than the threshold value, the power feeding control unit 17 sets the charging / discharging control unit 15 to the discharging mode to feed power from the battery 16.
[Selection] Figure 1

Description

  The present invention relates to a wireless power supply type power supply device that drives a target device such as a power tool, and also relates to a power tool, a charging device, and an electrical device that support wireless power supply.

  FIG. 13 is a functional block diagram of a conventional power supply device 801. FIG. 14 is an external view of the power supply device 801 in a tool mounting state. In the conventional power supply device, DC power is supplied from the battery 16, AC power is generated and output by the inverter circuit 13, and power is supplied from the output terminal 11 of the output plug 12 to the AC-driven electric tool 4. Let According to this, the electric power tool 4 can be used by bringing the power supply device into the work place even if the work place is a place where commercial power cannot be taken.

  Patent Document 1 below discloses a technique for transmitting charging power to a battery pack from a power supply device in a contactless manner.

JP 2011-034793 A

  In the conventional power supply device, since the electric power that can be generated by the battery 16 is limited, there is a problem that the driveable time of the electric power tool 4 is short. In the technique of Patent Document 1, since the power supply device cannot be driven without a commercial power supply, the battery driving time cannot be increased, and the above-described problems of the conventional power supply device cannot be solved.

  The present invention has been made in view of such a situation, and an object of the present invention is to provide a power supply device, a power tool, and a charging device capable of ensuring a longer power supply time compared to the conventional case even in an environment without a commercial power supply. And providing electrical equipment.

One embodiment of the present invention is a wireless power supply compatible power supply device. This power supply is
A power supply device to which a battery can be connected,
A receiving means capable of receiving power wirelessly;
A signal measuring unit for measuring the voltage or power of the AC signal received by the receiving means;
A converter circuit for converting the AC signal into a DC voltage;
A power supply control unit that selects which one of the DC voltage output from the battery and the DC voltage output from the converter circuit is used for power supply based on the measurement result in the signal measurement unit.

  The power supply control unit uses a DC voltage output from the converter circuit for power supply when the voltage or power of the AC signal measured by the signal measurement unit is equal to or greater than a predetermined threshold, and the voltage or power is less than the threshold. In such a case, control may be performed so that a DC voltage output from a battery connected to the power supply apparatus is used for power supply.

  You may provide the inverter circuit which converts the direct current voltage selected by the said electric power feeding control part into alternating current voltage.

  The power supply device may be separate from the power supply target device and may be cable-connected to the device.

  When the device connected to the power supply device is not in use or when the power supply device is not connected to the device, the power supply control unit uses a received power of the receiving means to connect a battery connected to the power supply device. You may control to charge.

  The power supply device may output an AC voltage having an effective value of 100V.

Another aspect of the present invention is a wireless power supply compatible power tool. This electric tool
Battery,
A receiving means capable of receiving power wirelessly;
A signal measuring unit for measuring the voltage or power of the AC signal received by the receiving means;
A converter circuit for converting the AC signal into a DC voltage;
A power supply control unit that selects which one of the DC voltage output from the battery and the DC voltage output from the converter circuit is used for power supply based on the measurement result in the signal measurement unit.

  The power supply control unit uses a DC voltage output from the converter circuit for power supply when the voltage or power of the AC signal measured by the signal measurement unit is equal to or greater than a predetermined threshold, and the voltage or power is less than the threshold. In such a case, control may be performed so that the DC voltage output from the battery is used for power supply.

A battery pack for storing the battery;
The battery pack may include the receiving unit, the signal measuring unit, the converter circuit, and the power supply control unit.

  The power supply control unit may control the battery to be charged by the received power of the receiving unit when the power tool is not in use.

Another aspect of the present invention is a wireless power supply compatible power tool. This electric tool
An AC cord connected to the motor and an AC power source;
A motor control circuit for controlling the motor;
A receiving means capable of receiving power wirelessly;
A signal measuring unit for measuring the voltage or power of the AC signal received by the receiving means;
A power supply control unit configured to select which one of the AC voltage from the AC code and the power received by the receiving unit is used for power supply to the motor based on a measurement result in the signal measurement unit;

Another aspect of the present invention is a wireless charging compatible charging apparatus. This charging device
A charging device for charging a battery pack having a battery,
An AC cord connected to an AC power source;
A charge control circuit for controlling charging of the battery;
A receiving means capable of receiving power wirelessly;
A signal measuring unit for measuring the voltage or power of the AC signal received by the receiving means;
A power supply control unit configured to select which of the AC code and the reception unit is used as a charging power source for the battery based on a measurement result in the signal measurement unit;

Another aspect of the present invention is a wireless power supply compatible electrical device. This electrical equipment
A receiving unit capable of receiving power wirelessly; and a power supply control unit that selects which of power from the receiving unit and power from a power source other than wireless is output.

  It should be noted that any combination of the above-described constituent elements, and those obtained by converting the expression of the present invention between methods and systems are also effective as aspects of the present invention.

  According to the present invention, it is possible to ensure a longer power supply time compared to the conventional case even in an environment without a commercial power source.

The functional block diagram of the power supply system which combined the power supply device which concerns on Embodiment 1 of this invention with the transmitter. The flowchart from the reception in a receiver to the electric power feeding method selection in a power supply device. The front sectional view of the power supply device of FIG. The rear view of the power supply device. The tool mounting figure which mounted | wore the electric power tool (AC drive) with the same power supply device. The side view of the electric tool (DC drive) which concerns on Embodiment 2 of this invention. The functional block diagram of the battery pack of the electric tool. The side view of the electric tool (DC drive) which concerns on Embodiment 3 of this invention. The side view of the electric tool (AC drive) which concerns on Embodiment 4 of this invention. The functional block diagram of the electric tool of FIG. The side view of the charging device which concerns on Embodiment 5 of this invention. The functional block diagram of the charging device of FIG. The functional block diagram of the conventional power supply device. The tool mounting figure which mounted | wore the power tool with the power supply device.

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings. In addition, the same code | symbol is attached | subjected to the same or equivalent component, member, process, etc. which are shown by each drawing, and the overlapping description is abbreviate | omitted suitably. In addition, the embodiments do not limit the invention but are exemplifications, and all features and combinations thereof described in the embodiments are not necessarily essential to the invention.

  FIG. 1 is a functional block diagram of a power supply system in which a power supply device 1 according to an embodiment of the present invention is combined with a transmission device 2. Each block is realized by hardware or software, or a combination thereof. The transmission device 2 is an example of a transmission unit that wirelessly transmits power. For example, the energy supplied from the power supply unit 21 in the transmission device 2 is converted into an AC signal by the signal transmission unit 22 and then wirelessly transmitted from the transmission antenna 23 that generates electromagnetic waves. The power supply device 1 outputs from the output terminal 11 drive power based on the power of the AC signal received wirelessly from the transmission device 2 or the power of the battery 16. A target device such as an electric tool connected to the output terminal 11 is operated by the driving power. Hereinafter, a specific configuration of the power supply device 1 will be described.

  The power supply device 1 includes a receiving device 3, an AC / DC converter 14, a charge / discharge control unit 15, a battery 16, an inverter 13 (DC / AC inverter), and an output plug 12 (plug receptacle). The receiving device 3 is an example of a receiving unit that can receive power wirelessly. The AC / DC converter 14 converts the AC voltage (power) received by the receiving device 3 into a DC voltage (power). The charge / discharge control unit 15 includes a charge protection circuit unit and a discharge protection circuit unit, and controls charging / discharging of the battery 16. The battery 16 is housed in a battery case together with a protection circuit (not shown) and connected to the power supply device 1 in the form of a battery pack. The battery 16 may be built in the power supply device 1. The inverter 13 receives the DC voltage output from either the AC / DC converter 14 or the charge / discharge control unit 15 (battery 16), converts it to an AC voltage, and outputs it to the output terminal 11 of the output plug 12.

  The reception device 3 includes a reception antenna 10 that receives an electromagnetic wave generated by the transmission antenna 23 and generates an AC signal, a signal reception unit 19, a power measurement unit 18, a power supply control unit 17, and a switching unit 31. FIG. 2 is a flowchart from reception at the reception device 3 to power supply method selection at the power supply device 1. A signal (electromagnetic wave) transmitted from the transmitting antenna 23 of the transmitting device 2 is received by the receiving antenna 10, converted into an AC signal (power) by the signal receiving unit 19, and power or voltage is measured by the power measuring unit 18. The power feeding control unit 17 determines a power feeding method to be used based on the power or voltage measured by the power measuring unit 18.

  Specifically, when the power or voltage measured by the power measuring unit 18 is higher than the threshold value, the battery 16 is not used, and power is supplied by the AC signal (power) of the signal receiving unit 19. That is, the power supply control unit 17 controls the inverter 13 so that the connection destination by the switching unit 31 is on the AC / DC converter 14 side and the output voltage of the AC / DC converter 14 is input. The AC signal (power) of the signal receiver 19 is converted into a DC voltage (power) by the AC / DC converter 14, and then converted into an AC voltage (power) having an effective value of 100 V, for example, by the inverter 13. Are output to the output terminal 11.

  On the other hand, when the power or voltage measured by the power measurement unit 18 is lower than the threshold value, the power supply control unit 17 sets the charge / discharge control unit 15 to the discharge mode to supply power from the battery 16 and sets the switching unit 31 in the open state (AC The inverter 13 is controlled so that the output voltage of the charge / discharge control unit 15 (DC voltage of the battery 16) is input. The connection destination by the switching unit 31 may be the charge / discharge control unit 15 side. In this case, as will be described later, the battery 16 can be charged when the power supply target of the power supply device 1 is not used or not connected. The DC voltage (electric power) from the battery 16 is supplied to the inverter 13 via the charge / discharge control unit 15, and after the effective value is converted into an AC voltage (electric power) of, for example, 100 V by the inverter 13, the output terminal of the output plug 12 11 is output.

  When the power supply target (target device such as a power tool) of the power supply device 1 is not used or when the power supply target is not connected, the power supply control unit 17 sets the connection destination by the switching unit 31 on the charge / discharge control unit 15 side (battery 16 side). And the charge / discharge control unit 15 is controlled to the charge mode. Thereby, the battery 16 is charged via the charge / discharge control unit 15 by the AC signal (power) of the signal receiving unit 19. In addition, the unused or unconnected power supply target is measured, for example, by a current measuring unit (not shown) that the current between the inverter 13 and the output terminal 11 is equal to or less than a certain value (for example, zero or the vicinity thereof). Can be detected. Alternatively, the charge / discharge control unit 15 can detect the current (discharge or charge) by monitoring it. Furthermore, when discharging (power feeding), the voltage of the battery 16 drops (drops), and when the discharge is stopped, the voltage is restored to the original value. It can also be detected by monitoring at 15.

  FIG. 3 is a front sectional view of the power supply device 1 of FIG. FIG. 4 is a rear view of the power supply device 1. In this figure, the receiving antenna 10 is shown extracted from the block of the receiving device 3. FIG. 5 is a tool mounting diagram in which the power supply device 1 is mounted on the electric tool 4. As shown in these drawings, for example, a receiving device 3 having a receiving antenna 10 that receives an AC signal from a transmitting device inside a back surface portion (bottom surface portion) of, for example, a resin housing 50 of the power supply device 1 is arranged on an upper surface. The battery 16 is provided in the concave portion (battery mounting portion) of the unit, and the AC / DC converter 14, the inverter 13, and the charge / discharge control unit 15 are provided therein. The receiving antenna 10 is a loop antenna made of, for example, a loop coil in which an insulating coated wire is circulated many times. The receiving antenna 10 can be formed integrally with the housing 50. A cable 51 extends from the housing 50, and the output plug 12 is provided at the tip of the cable 51. The electric tool 4 is, for example, an electric driver such as an electronic pulse driver or an electric driving machine.

  According to the present embodiment, the following effects can be achieved.

(1) The power receiving device 1 is provided with a receiving device 3 that can receive power wirelessly. When power of a predetermined value or more can be received wirelessly, the battery 16 is not used, and power is supplied by the received power wirelessly. Compared with the prior art, consumption of the battery 16 can be suppressed. For this reason, even in an environment where there is no commercial power supply, it is possible to lengthen the drive time of the target device as compared with the conventional case.

(2) Since the battery 16 is charged with the wirelessly received power when the power supply target is not used, the drive time of the target device can be made longer.

(3) When power is supplied by wirelessly received power alone, the stability of output power is poor and there is a problem of insufficient output. However, since the battery 16 covers instability, a stable output can be obtained.

(4) Since the receiving antenna 10 is provided in the housing 50, the receiving antenna 10 can be increased in size as compared with the case where it is provided in the battery pack or the power tool body, and the wirelessly receivable power can be increased.

  FIG. 6 is a side view of the electric tool (DC drive) according to Embodiment 2 of the present invention. In this figure, the receiving antenna 10 is shown extracted from the block of the receiving device 3. FIG. 7 is a functional block diagram of a battery pack of the electric tool. This electric tool is an electric driver such as an electronic pulse driver or an electric driving machine, and a power supply unit corresponding to the power supply device 1 of FIG. 1 described in the first embodiment (excluding the inverter 13) can be freely attached and detached. The battery pack 101 is provided (for example, incorporated). In the battery pack 101, the inverter 13 of the power supply apparatus 1 in FIG. 1 is replaced with a changeover switch 133 which is an example of power supply switching means, and the output plug 12 is replaced with a terminal of the battery pack 101. 1 is the same as the power supply device 1 of FIG.

  When the power or voltage measured by the power measurement unit 18 is higher than the threshold value, the power supply control unit 17 sets the connection destination of one end of the changeover switch 133 to the AC / DC converter 14 side, and the power measured by the power measurement unit 18. Alternatively, when the voltage is lower than the threshold, the connection destination of the one end of the changeover switch 133 is the charge / discharge control unit 15 side. The other end of the changeover switch 133 is connected to the drive unit (for example, motor) side of the power tool, and the power tool drive voltage is output. This embodiment has the same effects as those of the first embodiment except for the increase in size of the receiving antenna 10.

  FIG. 8 is a side view of the electric tool (DC drive) according to Embodiment 3 of the present invention. This electric power tool is the same as that of the second embodiment except that the electric power tool body is integrally provided (for example, built-in) with a power supply unit that is detachable as the battery pack 101 in the second embodiment shown in FIGS. It is the same.

  FIG. 9 is a side view of an electric tool (AC drive) according to Embodiment 4 of the present invention. In this figure, the receiving antenna 10 is shown extracted from the block of the receiving device 3. FIG. 10 is a functional block diagram of the electric tool. This electric tool is an electric driver such as an electronic pulse driver or an electric driving machine, and is the receiving device 3 of the power supply device 1 of FIG. 1 described in the first embodiment (however, the switching unit 31 is replaced with a changeover switch 133). Is integrally provided (for example, incorporated) in the electric power tool main body, and can be connected to a commercial power source (an example of an AC power source) by wire. And either the supply electric power from a commercial power supply or the alternating current signal (electric power) of the signal receiving part 19 is selected, and it uses for the drive of the motor 150 in an electric tool. That is, when the power or voltage measured by the power measurement unit 18 is higher than the threshold value and when the commercial power supply is not connected, the power supply control unit 17 sets the connection destination of one end of the changeover switch 133 as the signal reception unit 19 side. When the power or voltage measured by the unit 18 is lower than the threshold value, the connection destination of the one end of the changeover switch 133 is the commercial power supply side. The other end of the changeover switch 133 is connected to the motor control circuit 152. The motor control circuit 152 converts the input voltage (the AC signal of the signal reception unit 19 or the voltage of the commercial power supply) into a motor drive signal according to control from the power supply control unit 17 and drives the motor 150. The trigger switch 151 is a switch that is turned on when the user pulls the trigger 60 in FIG.

  According to the present embodiment, when power of a certain value or more can be received wirelessly, power is supplied by wirelessly received power without using a commercial power supply, so energy saving can be achieved compared to the prior art. Can do.

  FIG. 11 is a side view of the charging apparatus according to Embodiment 5 of the present invention. In this figure, the receiving antenna 10 is shown extracted from the block of the receiving device 3. FIG. 12 is a functional block diagram of the charging device. This charging device is a device that charges a battery pack by attaching the battery pack to the battery pack mounting portion 167, and integrally includes (for example, incorporates) the receiving device 3 similar to that shown in FIG. (Example) can be wired. Then, either the power supplied from the commercial power supply or the AC signal (power) of the signal receiving unit 19 is selected and used for charging the battery pack mounted on the battery pack mounting unit 167. That is, when the power or voltage measured by the power measurement unit 18 is higher than the threshold value and when the commercial power supply is not connected, the power supply control unit 17 sets the connection destination of one end of the changeover switch 133 as the signal reception unit 19 side. When the power or voltage measured by the unit 18 is lower than the threshold value, the connection destination of the one end of the changeover switch 133 is the commercial power supply side. The other end of the changeover switch 133 is connected to the charge control circuit 165. The charging control circuit 165 converts the input voltage (the AC signal of the signal receiving unit 19 or the voltage of the commercial power source) into a charging voltage in accordance with the control from the power supply control unit 17, and is mounted on the battery pack mounting unit 167. The battery pack 160 is charged.

  According to the present embodiment, when power of a certain value or more can be received wirelessly, the battery pack is charged by wirelessly received power without using a commercial power supply. Can be achieved. In addition, as long as wireless power is received, the battery pack can always be charged even when the commercial power source is not connected, and the charging time and charging power when connected to the commercial power source thereafter can be suppressed.

  The present invention has been described above by taking the embodiment as an example. However, it is understood by those skilled in the art that various modifications can be made to each component and each processing process of the embodiment within the scope of the claims. By the way. Hereinafter, modifications will be described.

  In the first embodiment, when the power supply target device is DC driven, the inverter 13 is not provided, and the DC voltage output from the AC / DC converter 14 or the DC voltage output from the charge / discharge control unit 15 (battery 16) is used. What is necessary is just to set it as the structure output to the output terminal 11 of the output plug 12. FIG.

  The method of receiving power wirelessly is not limited to the electromagnetic wave reception method, and may be a resonance method (magnetic field resonance method, electric field resonance method).

  In the first embodiment, the power supply device 1 may be connected to an AC power source (for example, a commercial power source) by wire, and the battery 16 may be charged by the commercial power source.

  In the first embodiment, the power supply device 1 may be a battery pack that can be attached to the target device. In this case, when the target device is AC driven (can be wired to an AC power source such as a commercial power source), a switch for switching the driving source between the commercial power source and the power supply device 1 may be provided.

  In the first and second embodiments, the switching unit 31 may be switched manually by an operator instead of automatically switching.

DESCRIPTION OF SYMBOLS 1 Power supply device 2 Transmission device 3 Reception device 4 Electric tool 10 Reception antenna 11 Output terminal 12 Output plug 13 Inverter 14 DC / AC converter 15 Charge / discharge control unit 16 Battery 17 Power supply control unit 18 Power measurement unit 19 Signal reception unit 21 Power supply unit 22 Signal Transmitter 23 Transmitting Antenna

Claims (13)

A power supply device to which a battery can be connected,
A receiving means capable of receiving power wirelessly;
A signal measuring unit for measuring the voltage or power of the AC signal received by the receiving means;
A converter circuit for converting the AC signal into a DC voltage;
A wireless power supply type power supply apparatus comprising: a power supply control unit that selects which one of a DC voltage output from a battery and a DC voltage output from the converter circuit is used for power supply based on a measurement result in the signal measurement unit.   The power supply control unit uses a DC voltage output from the converter circuit for power supply when the voltage or power of the AC signal measured by the signal measurement unit is equal to or greater than a predetermined threshold, and the voltage or power is less than the threshold. 2. The wireless power supply compatible power supply device according to claim 1, wherein the control is performed so that a DC voltage output from a battery connected to the power supply device is used for power supply.   The wireless power supply-compatible power supply device according to claim 1, further comprising an inverter circuit that converts a DC voltage selected by the power supply control unit into an AC voltage.   4. The wireless power supply type power supply device according to claim 1, wherein the power supply target device is separate from the power supply target device and connected to the device by cable. 5.   When the device connected to the power supply device is not in use or when the power supply device is not connected to the device, the power supply control unit uses a received power of the receiving means to connect a battery connected to the power supply device. The power supply apparatus for wireless power feeding according to any one of claims 1 to 4, wherein the power supply apparatus is controlled to be charged.   The power supply apparatus for wireless power feeding according to any one of claims 1 to 5, which outputs an AC voltage having an effective value of 100V. Battery,
A receiving means capable of receiving power wirelessly;
A signal measuring unit for measuring the voltage or power of the AC signal received by the receiving means;
A converter circuit for converting the AC signal into a DC voltage;
A wireless power supply-compatible power tool comprising: a power supply control unit that selects which one of a DC voltage output from a battery and a DC voltage output from the converter circuit is used for power supply based on a measurement result in the signal measurement unit.   The power supply control unit uses a DC voltage output from the converter circuit for power supply when the voltage or power of the AC signal measured by the signal measurement unit is equal to or greater than a predetermined threshold, and the voltage or power is less than the threshold. When it is, it controls so that the direct current voltage which the said battery outputs may be used for electric power feeding. A battery pack for storing the battery;
The wireless battery-powered electric tool according to claim 7 or 8, wherein the battery pack includes the receiving unit, the signal measuring unit, the converter circuit, and the power feeding control unit.   The wireless power supply according to any one of claims 7 to 9, wherein when the power tool is not in use, the power supply control unit controls the battery to be charged with the received power of the reception unit. Type electric tool. An AC cord connected to the motor and an AC power source;
A motor control circuit for controlling the motor;
A receiving means capable of receiving power wirelessly;
A signal measuring unit for measuring the voltage or power of the AC signal received by the receiving means;
Based on the measurement result in the signal measurement unit, the power supply control unit includes a power supply control unit that selects which of the AC voltage from the AC code and the power received by the reception unit is used for power supply to the motor. Type electric tool. A charging device for charging a battery pack having a battery,
An AC cord connected to an AC power source;
A charge control circuit for controlling charging of the battery;
A receiving means capable of receiving power wirelessly;
A signal measuring unit for measuring the voltage or power of the AC signal received by the receiving means;
A wireless power feeding compatible charging apparatus comprising: a power feeding control unit that selects which of the AC code and the receiving unit is used as a charging power source for the battery based on a measurement result in the signal measuring unit.   A wireless power feeding compatible electric device comprising: a receiving unit capable of receiving power wirelessly; and a power feeding control unit that selects whether to output power from the receiving unit or power from a power source other than wireless.