System and method for controlling exchange of current
View Patent ↗A system for charging an electrically powered vehicle comprises a DC battery; and a current exchange controller. The current exchange controller is configured for receiving a supply current from an off-board power source and determining a desired current exchange characteristic. The current exchange controller is also configured for determining a modulation scheme for providing an exchange current that exhibits the desired current exchange characteristic; and modulating the exchange current in accordance with the modulation scheme so as to deliver an exchange current exhibiting the desired current exchange characteristic. The modulation scheme is configured to meet one or more criteria based on annoyance.
1. A system for charging an electrically powered vehicle, the system comprising:
a source of electrical current; and
a current exchange controller;
the current exchange controller being configured for:
determining a desired current exchange characteristic;
determining a modulation scheme for providing an exchange current that exhibits the desired current exchange characteristic; and
modulating the exchange current in accordance with the modulation scheme so as to deliver an exchange current exhibiting the desired current exchange characteristic;
wherein the modulation scheme is configured to meet one or more criteria based on annoyance.
2. A system for charging an electrically powered vehicle as in claim 1 , wherein the modulation scheme includes pseudo-random frequency modulation.
3. A system for charging an electrically powered vehicle as in claim 1 , wherein the criteria based on annoyance criteria is based on operator perception.
4. A system for charging an electrically powered vehicle as in claim 1 , wherein the criteria based on annoyance is a function of frequency.
5. A system for charging an electrically powered vehicle as in claim 1 , wherein the criteria based on annoyance is based on the exchange current.
6. A system for charging an electrically powered vehicle as in claim 1 , wherein the modulation scheme avoids a range of frequencies between about 5 kHz and 6 kHz.
7. A system for charging an electrically powered vehicle as in claim 1 , wherein the modulation scheme avoids a range of frequencies between about 3 kHz and 6 kHz.
8. A system for charging an electrically powered vehicle as in claim 1 , wherein the modulation scheme employs spectrum spreading.
9. A system for charging an electrically powered vehicle as in claim 1 , wherein the modulation scheme employs frequency hopping.
10. A system for charging an electrically powered vehicle as in claim 1 , wherein the desired current exchange characteristic is a pre-programmed voltage.
11. A system for charging an electrically powered vehicle as in claim 1 , wherein the desired current exchange characteristic uses feedback to satisfy safety criteria.
12. A method for charging an electrical system of an electrically powered vehicle, the method comprising:
determining a desired current exchange characteristic;
determining a modulation scheme for providing an exchange current that exhibits the desired current exchange characteristic; and
modulating the exchange current so as to deliver an exchange current exhibiting the desired current exchange characteristic;
wherein the modulation scheme is configured to meet one or more criteria based on annoyance.
13. A method for charging an electrical system of an electrically powered vehicle as in claim 12 , wherein the modulation scheme includes pseudo-random frequency modulation.
14. A method for charging an electrically powered vehicle as in claim 12 , wherein the criteria based on annoyance is based on operator perception.
15. A method for charging an electrically powered vehicle as in claim 12 , wherein the criteria based on annoyance is a function of frequency.
16. A method for charging an electrically powered vehicle as in claim 12 , wherein the criteria based on annoyance is based on the exchange current.
17. A method for charging an electrically powered vehicle as in claim 12 , wherein the modulation scheme avoids a range of frequencies between about 3 kHz and 6 kHz.
18. A system for charging an electrically powered vehicle as in claim 12 , wherein the modulation scheme employs spectrum spreading.
19. A method for charging an electrically powered vehicle as in claim 12 , wherein the modulation scheme employs frequency hopping.
20. A method for charging an electrically powered vehicle as in claim 12 , wherein the desired current exchange characteristic is a pre-programmed voltage.