초록 ▼

Methods and apparatus for controlling power to a load device. The apparatus include a standby loss prevention module or a transformer system including the module. The module and system are directed to sensing load requirements and controlling a transformer accordingly to reduce power consumption whe

Methods and apparatus for controlling power to a load device. The apparatus include a standby loss prevention module or a transformer system including the module. The module and system are directed to sensing load requirements and controlling a transformer accordingly to reduce power consumption when the load is in a stand by mode. One method includes interposing a control switch between an electrical supply and a load device, determining when the load device requires full-level operational power, activating the control switch to interpose a step-up transformer between the electrical supply and the load device, providing full-level operational power to the load device, and deactivating the step-up transformer when the load device is not in use.

대표청구항 ▼

What is claimed is: 1. A standby loss prevention module for use with a transformer, said module comprising: a sensor connected to a load associated with a transformer; communication means operatively linked with said sensor, said communication means for detecting a mode of load operation and commun

What is claimed is: 1. A standby loss prevention module for use with a transformer, said module comprising: a sensor connected to a load associated with a transformer; communication means operatively linked with said sensor, said communication means for detecting a mode of load operation and communicating a corresponding load operation signal, and; a control switch connected to said transformer, said control switch enabled to receive said load operation signal and deactivate said transformer when said load is in a predetermined mode. 2. The standby loss prevention module according to claim 1 wherein said sensor is selected from the group including voltage sensors, current sensors, and resistance sensors. 3. The standby loss prevention module according to claim 2 wherein when said sensor is a voltage sensor, said sensor is selected from the group of coil sensors, potential divider sensors, and feedback controlled voltage sensors. 4. The standby loss prevention module according to claim 1 wherein said sensor is an operational amplifier having a threshold defining means at an input thereof, said operational amplifier receiving at least one input from said load and having an output thereof connected to said control switch through said communications means. 5. The standby loss prevention module according to claim 4 wherein said threshold defining means is a potential divider connected to a second input of said operational amplifier. 6. The standby loss prevention module according to claim 2 wherein when said sensor is a current sensor, said sensor comprises: a sensing transformer connected in series with at least one supply line, said sensing transformer sensing current drawn by said load and converting the current drawn into a voltage signal; and a rectifier and filter circuit connected to an output of said sensing transformer for rectifying and filtering said voltage signal. 7. The standby loss prevention module according to claim 1 wherein said communication means is implemented in a form including physical wires, wireless transmitters and receivers, transceivers, and optically active devices. 8. The standby loss prevention module according to claim 7 wherein said wireless transmitter is connected to said sensor and said receiver is connected to said control switch. 9. The standby loss prevention module according to claim 7 wherein said optically active device is an opto-isolator. 10. The standby loss prevention module according to claim 1 wherein said control switch is connected to said communications means and selected from the group including semiconductor switches and spring based relay control switches. 11. The standby loss prevention module according to claim 1 wherein said control switch is a triac device connected to said communication means. 12. The standby loss prevention module according to claim 10 wherein when said switch is a relay control switch, said switch includes a conductor to short a secondary winding of the transformer in pressure regulator applications. 13. The standby loss prevention module according to claim 1 wherein said control switch includes a timing device for controlling enable-time. 14. The standby loss prevention module according to claim 13 wherein said timing device is selected from the group including spring based timers, microcontroller based timers, and microprocessor based timers. 15. The standby loss prevention module according to claim 12 wherein said relay control switch includes a jumper for remotely controlling transformer operation. 16. The standby loss prevention module according to claim 1 wherein said transformer is a single or multi phase transformer. 17. The standby loss prevention module according to claim 1 wherein said transformer is a booster type, buck type, or isolation type transformer. 18. The standby loss prevention module according to claim 1 wherein said sensor and control switch are printed on a circuit board. 19. A transformer system having standby loss prevention module, said transformer system comprising: a transformer implemented to receive an input and transform said input for use by a load; a sensor connected between an output of said transformer and said load; a communication link including said sensor and being connected between said transformer and said load, said sensor detecting a mode of load operation and communicating a corresponding load mode signal over said communication link, and; a control switch connected to said transformer and sensor through said communicating link, said control switch deactivating said transformer when said load mode signal indicates that said load is in a standby mode to thereby prevent unnecessary power consumption. 20. The transformer system according to claim 19 wherein said transformer has a plurality of primary coils. 21. The transformer system according to claim 20 wherein selected primary coils from said plurality of primary coils are selectively activated and deactivated according to power requirements of said load. 22. The transformer system according to claim 19 wherein said transformer is a plurality of transformers. 23. The transformer system according to claim 22 wherein selected transformers from said plurality of transformers are selectively activated and deactivated according to power requirements of said load. 24. A method of reducing power consumption to an electrical device, said method comprising: interposing a control switch between an electrical supply and a load device; determining when the load device requires full-level operational power; activating said control switch to interpose a step-up transformer between said electrical supply and said load device; providing full-level operational power to the load device; and deactivating the step-up transformer when the load device is not in use.