Wireless power supply for electrical devices
A wireless power supply system may comprise a wireless power transmitting circuit configured to transmit radio-frequency (RF) signals, and a wireless power receiving circuit configured to convert power from the RF signals into a direct-current (DC) output voltage stored in an energy storage element. The wireless power transmitting circuit may be electrically or magnetically coupled to an antenna and/or electrical wiring of a building for transmitting the RF signals. The wireless power transmitting circuit may be housed in an enclosure that is affixed in a relative location with respect to the wireless power receiving circuit. The antenna may comprise two antenna wires that extend from the enclosure. The wireless power receiving circuit may be electrically or magnetically coupled to an antenna for receiving the RF signals. The wireless power receiving circuit may comprise an RF-to-DC converter circuit for converting the power from the RF signals into a DC output voltage.
1 . A motorized window treatment wireless power transfer system, comprising:
first power converter circuitry coupled to a first antenna, wherein the first power converter circuitry includes radio frequency (RF) to direct current (DC) converter circuitry and buck/boost converter circuitry to convert an RF signal received via the first antenna to a first DC supply voltage;
second power converter circuitry to receive the first DC supply voltage and provide a second DC supply voltage greater than the first DC supply voltage;
wireless power receiver control circuitry to:
receive a signal indicative of the second DC supply voltage; and
cause an adjustment of an operational status of the second power converter circuitry based on the second DC supply voltage such that:
responsive to the second DC supply voltage below a threshold value, place the second power converter in a NON-OPERATIONAL state in which an energy storage device coupled in parallel with the second power converter circuitry and between the first DC supply voltage and the second DC supply voltage supplies power to a drive motor operatively coupled to the motorized window treatment; and responsive to the second DC supply voltage not below the threshold value, place the second power converter in an OPERATIONAL state in which the second power converter circuitry delivers power to the drive motor.
2 . The wireless power transfer system of claim 1 , further comprising:
a first rechargeable energy storage device operatively coupled to the first power converter circuitry, the first rechargeable energy storage device to provide power to the wireless power receiver control circuitry.
3 . The wireless power transfer system of claim 2 , further comprising:
a second rechargeable energy storage device operatively coupled to the second power converter circuitry, the second rechargeable energy storage device to provide power to the motor driving the motorized window treatment.
4 . The wireless power transfer system of claim 3 , further comprising:
an RF transceiver communicatively coupled to a second antenna and to the wireless power receiver control circuitry;
wherein the wireless power receiver control circuitry to further:
receive an instruction from the RF transceiver circuitry, the instruction including data representative of a final window treatment position;
cause a transition of the second power converter circuitry to the OPERATIONAL state; and
cause the motor to position the motorized window treatment at the final position.
5 . The wireless power transfer system of claim 4 wherein the wireless power receiver control circuitry to further:
responsive to the receipt of the instruction from the RF transceiver circuitry, determine a starting position of the motorized window treatment.
6 . The wireless power transfer system of claim 4 wherein the wireless power receiver control circuitry to further:
responsive to the receipt of the instruction from the RF transceiver circuitry:
determine a starting position of the motorized window treatment; and
monitor, via an operatively coupled rotational position sensor circuit, a location of the motorized window treatment while the motorized window treatment is in motion.
7 . The wireless power transfer system of claim 4 wherein the wireless power receiver control circuitry to further:
responsive to the receipt of the instruction from the RF transceiver circuitry, determine a direction of rotation of the motorized window treatment.
8 . The wireless power transfer system of claim 1 wherein the first power converter circuitry to receive a pulse width modulated (PWM) RF signal.
9 . The wireless power transfer system of claim 1 wherein the first power converter circuitry to receive a continuous RF signal.
10 . A method of wirelessly delivering power to a motorized window treatment system, the method comprising:
receiving, by first power converter circuitry that includes radio frequency (RF) to direct current (DC) converter circuitry and buck/boost converter circuitry, an RF signal;
converting, by the first power converter circuitry, the received RF signal to a first DC supply voltage;
converting, by second power converter circuitry, the first DC supply voltage to a second DC supply voltage greater than the first DC supply voltage;
receiving, by wireless power receiver control circuitry, a signal indicative of the second DC supply voltage; and
adjusting, by the wireless power receiver control circuitry, an operational state of the second power converter circuitry based on the second DC supply voltage such that:
responsive to the second DC supply voltage below a threshold value, placing the second power converter in a NON-OPERATIONAL state in which an energy storage device coupled in parallel with the second power converter circuitry and between the first DC supply voltage and the second DC supply voltage supplies power to a drive motor operatively coupled to the motorized window treatment; and
responsive to the second DC supply voltage not below the threshold value, placing the second power converter in an OPERATIONAL state in which the second power converter circuitry supplies power to the drive motor.
11 . The method of claim 10 , further comprising:
receiving, by the wireless power receiver control circuitry, via a second antenna and an RF transceiver communicatively coupled to the second antenna, an instruction including data representative of a final window treatment position;
transitioning, by the wireless power receiver control circuitry, the second power converter circuitry to the OPERATIONAL state; and
causing, by the wireless power receiver control circuitry, the motor to position the motorized window treatment at the final window treatment position.
12 . The method of claim 11 , further comprising:
determining, by the wireless power receiver control circuitry, a starting position of the motorized window treatment responsive to the receipt of the instruction from the RF transceiver circuitry.
13 . The method of claim 11 , further comprising, responsive to the receipt of the instruction from the RF transceiver circuitry:
determining, by the wireless power receiver control circuitry via an operatively coupled rotational position sensor circuit, a starting position of the motorized window treatment; and
monitoring, by the wireless power receiver control circuitry via the operatively coupled rotational position sensor circuit, a location of the motorized window treatment while the motorized window treatment is in motion.
14 . The method of claim 11 , further comprising:
determining, by the wireless power receiver control circuitry via an operatively coupled rotational position sensor circuit, a direction of rotation of the motorized window treatment responsive to the receipt of the instruction from the RF transceiver circuitry.
15 . A non-transitory, machine-readable, storage device that includes instructions that, when executed by wireless power receiver control circuitry, causes the control circuitry to:
receive, via first power converter circuitry that includes radio frequency (RF) to direct current (DC) converter circuitry and buck/boost converter circuitry, an RF signal;
cause the operatively coupled first power converter circuitry to convert the received RF signal to a first DC supply voltage;
cause operatively coupled second power converter circuitry to convert the first DC supply voltage to a second DC supply voltage greater than the first DC supply voltage;
receive a signal indicative of the second DC supply voltage; and
cause an adjustment to an operational state of the second power converter circuitry based on the second DC supply voltage such that:
responsive to the second DC supply voltage below a threshold value, placing the second power converter in a NON-OPERATIONAL state in which an energy storage device coupled in parallel with the second power converter circuitry and between the first DC supply voltage and the second DC supply voltage supplies power to a drive motor operatively coupled to the motorized window treatment; and
responsive to the second DC supply voltage not below the threshold value, placing the second power converter an OPERATIONAL state in which the second power converter circuitry supplies power to the drive motor.
16 . The non-transitory, machine-readable, storage device of claim 15 wherein the instructions, when executed by the wireless power receiver control circuitry, further cause the control circuitry to:
receive, via a second antenna and an RF transceiver communicatively coupled to the second antenna, an instruction including data representative of a final window treatment position;
cause a transition of the second power converter circuitry to the OPERATIONAL state responsive to the receipt of the instruction from the RF transceiver circuitry; and
cause operation of the motor operatively coupled to the motorized window treatment to position the motorized window treatment at the final window treatment position.
17 . The non-transitory, machine-readable, storage device of claim 16 wherein the instructions, when executed by the wireless power receiver control circuitry, further cause the control circuitry to:
determine, via an operatively coupled rotational position sensor circuit, a starting position of the motorized window treatment responsive to the receipt of the instruction from the RF transceiver circuitry.
18 . The non-transitory, machine-readable, storage device of claim 16 wherein the instructions, when executed by the wireless power receiver control circuitry, further cause the control circuitry to:
responsive to the receipt of the instruction from the RF transceiver circuitry:
determine, via an operatively coupled rotational position sensor circuit, a starting position of the motorized window treatment; and
monitor, via the operatively coupled rotational position sensor circuit, a location of the motorized window treatment while the motorized window treatment is in motion.
19 . The non-transitory, machine-readable, storage device of claim 16 wherein the instructions, when executed by the wireless power receiver control circuitry, further cause the control circuitry to:
determine, via an operatively coupled rotational position sensor circuit, a direction of rotation of the motorized window treatment responsive to the receipt of the instruction from the RF transceiver circuitry.