| CPC H02J 9/062 (2013.01) [H02J 7/0063 (2013.01); H02J 7/02 (2013.01); H02J 9/066 (2013.01)] | 8 Claims |
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1. An emergency power system for powering an elevator motor/generator, the emergency power system comprising:
at least one battery backup;
a static bypass switch coupled to the elevator motor/generator;
a first circuit for directing power from a power grid to the motor/generator via the static bypass switch when power from the grid is available;
a second circuit for directing power from the battery backup to the motor/generator when power from the grid is unavailable; and
a third circuit for directing power from the motor/generator to the battery backup when the motor/generator is braking;
a fourth circuit for directing power from the motor/generator to an external power source when the motor/generator is braking;
wherein the first circuit comprises a first module, second module, third module, and the static bypass switch, wherein:
a) the first module is configured to:
i) receive a first power signal from an external power source, wherein the first power signal is characterized by a first voltage;
ii) convert the first power signal to a second power signal, wherein the second power signal is a direct current signal, and the second power signal is characterized by a second voltage; and
iii) output the second power signal;
b) the second module is configured to:
i) receive the second power signal directly from the first module;
ii) convert the second power signal to a third power signal, wherein the third power signal is a direct current signal, and the third power signal is characterized by a third voltage different than the second voltage; and
iii) output the third power signal; and
c) the third module is configured to:
i) receive the third power signal directly from the second module;
ii) convert the third power signal to a fourth power signal, wherein the fourth power signal is an alternating current signal, wherein the fourth power signal is characterized by a fourth voltage different than the third voltage; and
iii) output the fourth power signal directly to the static bypass switch;
wherein the second circuit comprises the second module, third module, and static bypass switch, wherein:
a) the second module is further configured to:
i) receive a fifth power signal directly from the at least one battery backup, wherein the fifth power signal is characterized by a fifth voltage;
ii) convert the fifth power signal to a sixth power signal, wherein the sixth power signal is a direct current signal, and the sixth power signal is characterized by a sixth voltage different than the fifth voltage; and
iii) output the sixth power signal; and
b) the third module is further configured to:
i) receive the sixth power signal directly from the second module;
ii) convert the sixth power signal to a seventh power signal, wherein the seventh power signal is an alternating current signal, wherein the seventh power signal is characterized by a seventh voltage different than the sixth voltage; and
iii) output the seventh power signal directly to the static bypass switch;
wherein the third circuit comprises the third module and static bypass switch,
wherein:
a) the third module is further configured to:
i) receive an eighth power signal from the static bypass switch, wherein the eighth power signal is characterized by an eighth voltage;
ii) convert the eighth power signal to a ninth power signal; and
iii) output the ninth power signal to the at least one battery backup,
wherein the fourth circuit comprises the first module, second module, third module, and static bypass switch, wherein:
a) the third module is further configured to:
i) receive a tenth power signal directly from the static bypass switch, wherein the tenth power signal is characterized by a tenth voltage;
ii) convert the tenth power signal to an eleventh power signal, wherein the eleventh power signal is a direct current signal, and wherein the tenth power signal is characterized by an eleventh voltage different than the tenth voltage; and
iii) output the eleventh power signal;
b) the second module is further configured to:
i) receive the eleventh power signal directly from the third module;
ii) convert the eleventh power signal to a twelfth power signal, wherein the twelfth power signal is a direct current signal, and wherein the twelfth power signal is characterized by a twelfth voltage different than the eleventh voltage; and
iii) output the twelfth power signal;
c) the first module is further configured to:
i) receive the twelfth power signal directly from the second module;
ii) convert the twelfth power signal to a thirteenth power signal, wherein the thirteenth power signal is an alternating current signal, and wherein the thirteenth power signal is characterized by a thirteenth voltage different than the twelfth voltage; and
iii) output the thirteenth voltage to the external power source.
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