DC-DC converters having bullet terminals
View Patent ↗Example DC-DC converters include a housing having at least two bullet terminals. The at least two bullet terminals are configured to mate with corresponding terminals in a DC bullet breaker panel. The converter also includes a DC-DC voltage converter circuit coupled between the at least two bullet terminals, and a controller coupled with the DC-DC voltage converter circuit. The controller is configured to control the DC-DC converter circuit to convert a DC input voltage at a first one of the at least two bullet terminals to a different DC output voltage at another one of the at least two bullet terminals. Methods of converting DC voltages using DC-DC converters having bullet terminals are also disclosed.
1. A DC-DC converter comprising:
a housing having at least two bullet terminals, the at least two bullet terminals configured to mate with corresponding terminals of a DC bullet breaker panel;
a DC-DC voltage converter circuit coupled between the at least two bullet terminals;
a controller coupled with the DC-DC voltage converter circuit, the controller configured to control the DC-DC voltage converter circuit to convert a DC input voltage at a first one of the at least two bullet terminals to a different DC output voltage at a second one of the at least two bullet terminals; and
a power or current limiter circuit coupled between the at least two bullet terminals, the power or current limiter circuit configured to limit a DC output power or DC output current supplied at the second bullet terminal by the DC-DC converter, to below a specified output power threshold or specified output current threshold.
2. The DC-DC converter of claim 1 , further comprising an overcurrent protection circuit coupled between the at least two bullet terminals, the overcurrent protection circuit configured to protect the DC-DC converter from an overcurrent condition.
3. The DC-DC converter of claim 2 , wherein:
the controller is coupled with the power or current limiter circuit and configured to control the power or current limiter circuit to limit the DC output power or DC output current of the DC-DC converter to below a specified output power threshold or specified output current threshold; or
the controller is coupled with the overcurrent protection circuit and configured to control the overcurrent protection circuit to protect the DC-DC converter from an overcurrent condition.
4. The DC-DC converter of claim 2 , wherein the overcurrent protection circuit is configured to protect the DC-DC converter from an overcurrent condition at a DC output current threshold in a range of between 1 A and 50 A.
5. The DC-DC converter of claim 1 , wherein the controller is configured to operate the DC-DC voltage converter circuit to convert the DC input voltage within a specified voltage input range to the DC output voltage within a specified voltage output range.
6. The DC-DC converter of claim 5 , wherein the specified voltage input range is about −42 VDC to −58 VDC.
7. The DC-DC converter of claim 5 , wherein the specified voltage output range is about −48V to −72 VDC.
8. The DC-DC converter of claim 1 , wherein the power or current limiter circuit is configured to limit the DC output power to below the specified output power threshold in a range of between 100 W and 2500 W.
9. The DC-DC converter of claim 1 , wherein the power or current limiter circuit is configured to limit the DC output current to below the specified output current threshold in a range of between 1 A and 50 A.
10. The DC-DC converter of claim 1 , wherein the at least two bullet terminals include a bullet style line terminal or a bullet style load terminal.
11. The DC-DC converter of claim 1 , wherein the housing has substantially the same form factor as a bullet DC circuit breaker.
12. The DC-DC converter of claim 1 , further comprising:
a current sense coupled to detect a DC input current or DC output current of the DC-DC converter; or
a voltage sense coupled to detect a DC input voltage of the DC-DC converter, a DC output voltage of the DC-DC converter, or a voltage on an input of a remote radio unit used to control the DC output voltage of the DC-DC converter.
13. The DC-DC converter of claim 1 , further comprising a fault protection circuit coupled between the at least two bullet terminals.
14. The DC-DC converter of claim 1 , wherein the controller is configured to receive a remote on/off input to control the DC-DC converter via a remote on/off operation control.
15. The DC-DC converter of claim 1 , further comprising an alarm contact positioned on an outer portion of the housing, the alarm contact configured to transmit an alarm signal when an alarm condition of the DC-DC converter is detected.
16. A DC power distribution system including the DC-DC converter of claim 1 , the DC power distribution system further comprising a DC bullet breaker panel having at least two bullet terminals, wherein the at least two bullet terminals of the DC-DC converter are coupled with the at least two bullet terminals of the DC bullet breaker panel.
17. The DC-DC converter of claim 1 , wherein:
the controller is configured to communicate with a computing device to allow the computing device to monitor or program the DC-DC converter;
the controller is configured to receive a manual on/off input to control the DC-DC converter via a manual on/off operation control; or
the controller is configured to disconnect at least one of the bullet terminals when a low-voltage condition is detected.
18. A method of converting DC voltage using a DC-DC converter, the DC-DC converter including a housing having at least two bullet terminals, a DC-DC voltage converter circuit coupled between the at least two bullet terminals, a power or current limiter circuit coupled between the at least two bullet terminals, and a controller coupled with the DC-DC voltage converter circuit, the at least two bullet terminals configured to mate with corresponding terminals in a DC bullet breaker panel, the method comprising:
receiving, at a first one of the at least two bullet terminals, a DC input voltage from one of the corresponding terminals of the DC bullet breaker panel;
converting, by the DC-DC voltage converter circuit, the received DC input voltage to a different DC output voltage;
supplying, via a second one of the at least two bullet terminals, the converted DC output voltage to another one of the corresponding terminals of the DC bullet breaker panel; and
limiting, by the power or current limiter circuit, a DC output power or DC output current supplied at the second bullet terminal by the DC-DC converter, to below a specified output power threshold or specified output current threshold.
19. The method of claim 18 , wherein supplying the converted DC output voltage includes supplying the converted DC output voltage to wireless radio equipment located on a radio tower.
20. The method of claim 19 , wherein:
receiving the DC input voltage includes receiving the DC input voltage from a battery; and
supplying the converted DC output voltage includes supplying the converted DC output voltage to the wireless radio equipment during a utility power outage.