Packet Energy Transfer In-Line Communications

• US 20150215001A1
• Filed: 01/26/2015
• Published: 07/30/2015
• Est. Priority Date: 01/26/2014
• Status: Active Grant

• Current Assignee: VoltServer, Inc.
• Original Assignee: VoltServer, Inc.
• Inventors: Eaves, Stephen Spencer
• Granted Patent: US 9,184,795 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: G01R 29/027 Indicating that a pulse characteristic is either above or below a predetermined value or within or beyond a predetermined range of values
• CPC Class Codes: H04B 3/542 the information being in digital form
• CPC Class Codes: H04L 1/0033 arrangements specific to the transmitter

Abstract

Data is communicated between a digital power transmitter and one or more digital power receivers over a transmission line comprising positive and negative conductors. If the transmitter is sending data to the receiver, a first transmitter electrical switch is selectively operated to increase electrical charge in the transmission-line capacitance. If the receiver is sending data to the transmitter, a first receiver electrical switch is selectively operated to increase electrical charge in the transmission-line capacitance.

Claims

1. A method for communicating data between a digital power transmitter and one or more digital power receivers over a transmission line comprising positive and negative conductors, wherein the transmission line has electrical properties that include at least a finite line-to-line capacitance and at least a finite line-to-line resistance, the method comprising:

a) if the transmitter is sending data to the receiver,

selectively operating a first transmitter electrical switch to increase electrical charge in the transmission-line capacitance by connecting the transmission-line to a transmitter voltage source through a finite resistance or by operating a second transmitter electrical switch to decrease electrical charge by connecting the positive and negative conductors to each other through a finite resistance such that the rate of change in transmission-line voltage alternates between a first voltage slope value and a second voltage slope value, wherein the change in voltage slope is detected and decoded by the receiver to reproduce the data being sent by the transmitter; and

b) if the receiver is sending data to the transmitter,

selectively operating a first receiver electrical switch to increase electrical charge in the transmission-line capacitance by connecting the transmission lines to a receiver voltage source through a finite resistance or by operating a second receiver electrical switch to decrease electrical charge by connecting the positive and negative conductors to each other through a finite resistance such that the rate of change in transmission-line voltage alternates between a first voltage slope value and a second voltage slope value, wherein the change in voltage slope is detected and decoded by the transmitter to reproduce the data being sent by the receiver.

2. The method of claim 1, wherein the transmitter voltage source is connected to the transmission line through a series resistance small enough to cause a rapid increase in transmission-line voltage, the method further comprising using the detection of the rapid increase by the transmitter or receiver as a timing reference point for setting relative times to sample and determine the voltage slope values that signify logic states.

3. The method of claim 1, wherein, during the time when the receiver is communicating to the transmitter, the transmitter acts to connect the transmission line to the transmitter voltage source through a first resistor value;

and the load side simultaneously connects the transmission-line conductors to each other through a second resistor value, thus forming a voltage divider that creates a third voltage slope value that is detected by the transmitter.

4. The method of claim 1, wherein, if the transmitter is sending data to the receiver, only one of the two transmitter electrical switches is implemented such that the rate of change in transmission-line voltage alternates between a first voltage slope value when the one transmitter electrical switch is closed and a second voltage slope value when the one transmitter electrical switch is open, wherein the change in voltage slope is detected and decoded by the receiver to reproduce the data being sent by the transmitter.

5. The method of claim 1, wherein, if the receiver is sending data to the transmitter, only one of the two receiver electrical switches is implemented such that the rate of change in transmission-line voltage alternates between a first voltage slope value when the one receiver electrical switch is closed and a second voltage slope value when the one receiver electrical switch is open, wherein the change in voltage slope is detected and decoded by the transmitter to reproduce the data being sent by the receiver.

6. The method of claim 1, wherein the transmitter or receiver executes an encoding algorithm for a predetermined number of original data bits to be transmitted, wherein the input to the encoding algorithm is the predetermined number of original bits and the output of the algorithm is a larger number of optimized bits that are chosen to maintain the transmission-line voltage between predetermined upper and lower voltage boundaries, and wherein the optimized bits are then decoded at the receiver back to the predetermined number of original bits.

7. The method of claim 1, wherein the transmitter or receiver executes an algorithm to calculate the capacitance of the transmission line based on a measurement of the rate of decay of transmission-line voltage and a predetermined value of line-to-line resistance.

8. The method of claim 7, wherein the calculated capacitance value of the transmission line and the predetermined line-to-line resistance is used as inputs to an algorithm to predict the time when the transmission-line voltage will decay to an optimal value for supporting the transmission of data.

9. The method of claim 1, wherein the transmitter maintains predetermined acceptable values for transmission-line voltage, and wherein voltages outside of the acceptable values indicate a fault condition, and wherein the transmitter executes an algorithm to adjust the acceptable values based on the characteristics of the data transmitted from the transmitter to the receiver or from the receiver to the transmitter.

10. A method for communicating data between a digital power transmitter and one or more digital power receivers over a transmission line comprising positive and negative conductors, wherein the transmission line has electrical properties that include at least a finite line-to-line capacitance and at least a finite line-to-line resistance, the method comprising:

a) if the transmitter is sending data to the receiver,

selectively adding electrical charge to the transmission line capacitance by connecting the transmission line to a transmitter power source or subtracting electric charge from the transmission line capacitance by connecting the positive and negative conductors to a transmitter power sink, such that the rate of change in transmission line voltage alternates between a first voltage slope value and a second voltage slope value, wherein the change in voltage slope is detected and decoded by the receiver to reproduce the data being sent by the transmitter; and

b) if the receiver is sending data to the transmitter,

selectively adding electric charge to the transmission-line capacitance by connecting the transmission lines to a receiver power source or by selectively subtracting electric charge from the transmission line capacitance by connecting the conductors to a receiver power sink, such that the rate of change in transmission-line voltage alternates between a first voltage slope value and a second voltage slope value, wherein the change in voltage slope is detected and decoded by the transmitter to reproduce the data being sent by the receiver.

11. The method of claim 10, wherein the transmitter power source is connected to the transmission line through a series resistance small enough to cause a rapid increase in transmission-line voltage, the method further comprising using the detection of the rapid increase by the transmitter or receiver as a timing reference point for setting relative times to sample and determine the voltage slope values that signify logic states.

12. The method of claim 10, wherein, during the time when the receiver is communicating to the transmitter, the transmitter acts to connect the transmission line to the transmitter voltage source through a first resistor value;

and the load side simultaneously connects the transmission-line conductors to each other through a second resistor value, thus forming a voltage divider that creates a third voltage slope value that is detected by the transmitter.

13. The method of claim 10, wherein, if the transmitter is sending data to the receiver, only one method of either adding or subtracting charge is implemented such that the rate of change in transmission-line voltage alternates between a first voltage slope value when the one method of adding or subtracting charge is implemented and a second voltage slope where charge is not being added or subtracted, wherein the change in voltage slope is detected and decoded by the receiver to reproduce the data being sent by the transmitter.

14. The method of claim 10, wherein, if the receiver is sending data to the transmitter, only one method of either adding or subtracting charge is implemented such that the rate of change in transmission-line voltage alternates between a first voltage slope value when the one method of adding or subtracting charge is implemented and a second voltage slope where charge is not being added or subtracted, wherein the change in voltage slope is detected and decoded by the transmitter to reproduce the data being sent by the receiver.

15. The method of claim 10, wherein the transmitter or receiver executes an encoding algorithm for a predetermined number of original data bits to be transmitted, wherein the input to the encoding algorithm is the predetermined number of original bits and the output of the algorithm is a larger number of optimized bits that are chosen to maintain the transmission-line voltage between predetermined upper and lower voltage boundaries, and wherein the optimized bits are then decoded at the receiver back to the predetermined number of original bits.

16. The method of claim 10, wherein the transmitter or receiver executes an algorithm to calculate the capacitance of the transmission line based on a measurement of the rate of decay of transmission-line voltage and a predetermined value of line-to-line resistance.

17. The method of claim 16, wherein the calculated capacitance value of the transmission line and the predetermined line-to-line resistance is used as inputs to an algorithm to predict the time when the transmission-line voltage will decay to an optimal value for supporting the transmission of data.

18. The method of claim 10, wherein the transmitter maintains predetermined acceptable values for transmission-line voltage, and wherein voltages outside of the acceptable values indicate a fault condition, and wherein the transmitter executes an algorithm to adjust the acceptable values based on the characteristics of the data transmitted from the transmitter to the receiver or from the receiver to the transmitter.