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| Solid oxide fuel cell matrix and modules |
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| Fuel cell system |
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| Method of conducting catalytically promoted gas-phase reactions |
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Switching power supply
| Details |
Inventors: Gulczynski, Zdzislaw;
Assignee:
Primary Examiner: Salce; Patrick R.
Assistant Examiner: Jones; Judson H.
Attorney, Agent or Firm:
The invention relates to switching power supplies receiving AC line voltage or DC voltage, particularly for highly efficient regulators operating at high switching frequency. The power supplies contain at least two switches being switched independently of each other; their individual parts can even oscillate autonomously. The energy is stored in at least one capacitor charged by high frequency current pulses. The discharging is independent of the user and also when the output resistance of the line is high so that the output ripple is very low, no minimum load is required and the power failure protection is inherent. The input current of the power supply is uninterrupted. Furthermore, there are no surge currents and any voltage spikes are eliminated; no snubbers are required. EMI/RFI are extremely low. Thyristors and triacs can be employed as they can be turned off by one of the remaining switches. The switching power is actually also an operative power amplifier with an extremely short response time. The load, in this case a loudspeaker with an LC-network connected prior thereto, can be coupled directly to the output of the power supply. |
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DETAILED DESCRIPTION Accordingly, the present invention is intended to provide a switching power supply having a very low number of components, short response time, very high reliability and efficiency as well as an extremely low EMI/RFI level.
The power supply includes a pair of switching converter means, A and B, operable independently of each other and each having input, reference and output terminals with the input terminals thereof both being coupled to receive the AC or DC signal, the reference terminals of the converters A and B being connected respectively to the output terminal of the converter B and ground, and two capacitors, each connected between the output terminal of a separate converter and ground with the output terminal of at least one of the converters providing the output signal of the power supply.
Further, embodiments take advantage of the use of multiple independent switches and solve the problem of the overlapping of conduction phases.
Consequently, there are no requirements on the symmetry of a control circuitry and the individual parts of the circuit can even oscillate autonomously.
No overvoltage spikes and no surge currents are expected; the reliability is very high.
No minimum load is required.
Finally, thyristors and triacs can be employed.
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Fuel Cells 
