Current inducing circuit

• US 7,915,846 B2
• Filed: 10/19/2007
• Issued: 03/29/2011
• Est. Priority Date: 10/19/2007
• Status: Expired due to Fees

• Current Assignee: George Sotiriou
• Original Assignee: George Sotiriou
• Inventors: Sotiriou, George
• Primary Examiner(s): Laxton; Gary L
• Assistant Examiner(s): QUDDUS, NUSRAT
• Application Number:
  US11/875,452
• Publication Number:
  US 20090103332A1
• Time in Patent Office: 1,257 Days
• Field of Search: 363/16, 363/17, 363/20, 363/21.01, 363/21.06, 363/21.14, 363/125, 307/139, 307/141, 318/445, 318/452, 318/484, 318/487
• US Class Current: 318/445
• CPC Class Codes: H02J 2207/20 Charging or discharging characterised by the power electronics converter
• CPC Class Codes: H02J 50/005 Mechanical details of housing or structure aiming to accommodate the power transfer means, e.g. mechanical integration of coils, antennas or transducers into emitting or receiving devices
• CPC Class Codes: H02J 50/12 of the resonant type
• CPC Class Codes: H02J 50/70 involving the reduction of electric, magnetic or electromagnetic leakage fields
• CPC Class Codes: H02J 7/00 Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
• CPC Class Codes: H02J 7/0068 Battery or charger load switching, e.g. concurrent charging and load supply H02J7/0013 takes precedence

Abstract

Various example embodiments are disclosed. According to one example embodiment, a charging probe may include an alternating current (AC) input configured to receive current from an AC source, a rectifier circuit configured to rectify the current received from the AC source, a primary coil, and a control circuit configured to convert the rectified current into a regulated voltage across a primary coil. The primary coil may be configured to induce a magnetic field from the regulated voltage.

Claims

1. An apparatus comprising:

a secondary coil configured to carry a current induced by a changing magnetic field;

a delay switch coupled to the secondary coil; and

an output node coupled to the delay switch,

wherein the delay switch comprises;

a transistor including a first end and a second end of a channel and a control node configured to control a resistance across the channel, the first end being coupled to a first end of the secondary coil and to a first end of a first capacitor, the control node being coupled to a second end of the first capacitor, and a second end of the channel being coupled to the output node of the apparatus;

the first capacitor, the first capacitor including the first end coupled to the first end of the secondary coil and to the first end of the channel, the first capacitor further including the second end coupled to the control node; and

a first resistor, the first resistor including a first end coupled to the second end of the first capacitor and to the control node of the transistor, the first resistor further including a second end coupled to ground.

2. The apparatus of claim 1, wherein the secondary coil includes a wire wrapped around a pot core.

3. The apparatus of claim 1, wherein the secondary coil includes a copper wire wrapped around a pot core.

4. The apparatus of claim 1, wherein:

the transistor includes a metal-oxide-semiconductor field-effect transistor (MOSFET);

the channel includes a source-drain channel of the MOSFET; and

the control node includes a gate of the MOSFET.

5. The apparatus of claim 1, further comprising a second capacitor, the second capacitor including a first end coupled to the first end of the secondary coil, the first end of the first capacitor, and the first end of the channel, the second capacitor further including a second end coupled to the second end of the first resistor and to the ground.

6. The apparatus of claim 5, further comprising:

a first diode, the first diode including a cathode end coupled to the second end of the channel, to the output, and to a first end of a third capacitor, the first diode further including an anode end coupled to a second end of the third capacitor, to the ground, to the second end of the first resistor, and to the second end of the second capacitor; and

the third capacitor, the third capacitor including the first end coupled to the second end of the channel, the first end of the first diode, and the output, the third capacitor further including a second end coupled to the ground, to the second end of the first diode, to the second end of the first resistor, and to the second end of the second capacitor.

7. The apparatus of claim 6, wherein the first diode includes a Zener diode.

12. The apparatus of claim 1, wherein the apparatus is included in a disk-shaped housing, the disk-shaped housing enclosing a disk with a plurality of magnets mounted onto the disk with alternating polarities, the disk being configured to rotate based on power received from the output.

13. The apparatus of claim 1, further including a housing which encloses the secondary coil, the delay switch, and the output node.

14. The apparatus of claim 13, wherein the housing is disk-shaped.

15. The apparatus of claim 13, wherein the housing includes no electrical contacts on an outside surface of the housing.

16. The apparatus of claim 13, wherein the housing is waterproof.

17. The magnetic therapy device of claim 13, wherein:

the housing includes an aperture; and

the secondary coil surrounds the aperture.

18. The apparatus of claim 1, further comprising:

a battery charging circuit configured to charge a rechargeable battery based on power from the output node, and to supply power to a motor and to a microprocessor based on the rechargeable battery;

the microprocessor configured to control a plurality of visual indicators and to control a motor;

the visual indicators configured to emit light outside the apparatus;

the motor configured to generate a magnetic field by spinning a disk upon which is mounted a plurality of magnets; and

a housing which encloses the battery charging circuit, the microprocessor, and the motor, and in which are mounted the secondary coil, the delay switch, the output node and the visual indicators.

19. The apparatus of claim 18, wherein the rechargeable battery is further configured to supply power to the microprocessor via a voltage regulator.

20. The apparatus of claim 18, wherein the microprocessor is configured to light the number of the plurality of visual indicators via a counter.

21. The apparatus of claim 18, wherein the microprocessor is further configured to light the number of the plurality of visual counters by periodically providing a number of clock pulses and a reset pulse to a counter.

22. The apparatus of claim 18, further comprising:

a tachometer, the tachometer being configured to monitor a magnetic field generated by the plurality of magnets and provide a signal to the microprocessor based on the monitored magnetic field,

wherein the microprocessor is configured to control the motor based on the signal received from the tachometer.

23. The apparatus of claim 22, wherein the tachometer is configured to monitor a frequency of magnetic flux generated by the plurality of magnets and provide the signal to the microprocessor based on the frequency of magnetic flux.

24. The apparatus of claim 1, further comprising:

a second capacitor, the second capacitor including a first end coupled to the first end of the secondary coil, the first end of the first capacitor, and the first end of the channel, the second capacitor further including a second end coupled to the second end of the first resistor and to the ground;

a first diode, the first diode including a cathode end coupled to the second end of the channel, to the output, and to a first end of a third capacitor, the first diode further including an anode end coupled to a second end of the third capacitor, to the ground, to the second end of the first resistor, and to the second end of the second capacitor; and

a second diode including a cathode end coupled to a second end of the secondary coil, the second diode further including an anode end coupled to the second end of the second capacitor, to the second end of the first resistor, to the anode end of the first diode, and to the ground.

8. An comprising

a secondary coil configured to carry a current induced by a changing magnetic field;

a delay switch coupled to the secondary coil; and

an output node coupled to the delay switch,

wherein the delay switch comprises;

a transistor including a first end and a second end of a channel and a control node configured to control a resistance across the channel, the first end being coupled to a first end of the secondary coil and to a first end of a first capacitor, the control node being coupled to a second end of the first capacitor, and a second end of the channel being coupled to the output node of the apparatus;

the first capacitor, the first capacitor including the first end coupled to the first end of the secondary coil and to the first end of the channel, the first capacitor further including the second end coupled to the control node; and

a first resistor, the first resistor including a first end coupled to the second end of the first capacitor and to the control node of the transistor, the first resistor further including a second end coupled to ground;

a second capacitor, the second capacitor including a first end coupled to the first end of the secondary coil, the first end of the first capacitor, and the first end of the channel, the second capacitor further including a second end coupled to the second end of the first resistor and to the ground;

a first diode, the first diode including a cathode end coupled to the second end of the channel, to the output, and to a first end of a third capacitor, the first diode further including an anode end coupled to a second end of the third capacitor, to the ground, to the second end of the first resistor, and to the second end of the second capacitor; and

the third capacitor, the third capacitor including the first end coupled to the second end of the channel, the first end of the first diode, and the output, the third capacitor further including a second end coupled to the ground, to the second end of the first diode, to the second end of the first resistor, and to the second end of the second capacitor; and

a second diode including a cathode end coupled to a second end of the secondary coil, the second diode further including an anode end coupled to the second end of the second capacitor, to the second end of the first resistor, to the anode end of the first diode, and to the ground.

9. The apparatus of claim 8, wherein the second diode includes a Schottky diode.

10. The apparatus of claim 8, further comprising a snubber circuit configured to reduce transient voltages between the second end of the secondary coil and the ground.

11. The apparatus of claim 8, further comprising:

a fourth capacitor and a second resistor connected in series, the series including a first end coupled to the second end of the secondary coil and to the cathode end of the second diode and a second end coupled to the anode end of the second diode, to the second end of the second capacitor, to the second end of the first resistor, to the anode end of the first diode, to the second end of the third capacitor, and to the ground.