A phase-controlled power supply is disclosed. The power supply includes a power conditioner with an input configured to connect to an external source of electrical power, the power conditioner being configured to provide conditioned power on its output. The power supply also includes a transformer h
A phase-controlled power supply is disclosed. The power supply includes a power conditioner with an input configured to connect to an external source of electrical power, the power conditioner being configured to provide conditioned power on its output. The power supply also includes a transformer having a primary winding and a secondary winding, and a switching module coupled between the output of the power conditioner and to the primary winding of the transformer. The switching module has two modes of operation and a control signal input configured to accept a first control signal. The switching module includes a switching element configured to connect the power conditioner output to the primary winding of the transformer. The switching module operates in the first mode when the first control signal is in a first state, switching the first switching element at a first frequency and first duty cycle. The switching module operates in the second mode when the first control signal is in a second state, switching the first switching element at a frequency and duty cycle according to the first control signal.
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1. A phase-controlled power supply, comprising: a power conditioner with an input and an output, the input configured to connect to an external source of electrical power, wherein the power conditioner is configured to provide conditioned power on its output;a transformer comprising a primary windin
1. A phase-controlled power supply, comprising: a power conditioner with an input and an output, the input configured to connect to an external source of electrical power, wherein the power conditioner is configured to provide conditioned power on its output;a transformer comprising a primary winding and a secondary winding; anda switching module coupled between the output of the power conditioner and the primary winding of the transformer, the switching module having open-loop and closed-loop modes of operation, the switching module comprising: a first switching element configured to connect the power conditioner output to the primary winding of the transformer; anda control signal input configured to accept a first control signal; wherein the switching module operates in the open-loop mode when the first control signal is in a first state, the open-loop mode comprising switching of the first switching element at a open-loop frequency and a open-loop duty cycle, and wherein the switching module operates in the closed-loop mode when the first control signal is in a second state, the closed-loop mode comprising switching of the first switching element at a closed-loop frequency and a closed-loop duty cycle according to the first control signal. 2. The phase-controlled power supply of claim 1 further comprising a controller, configured to provide the first control signal; wherein the first control signal is in its first state when the controller is not operational, and wherein the controller changes the first control signal from its first state to its second state upon completion of the controller's power-up and initialization. 3. The phase-controlled power supply of claim 2 further comprising a power converter having an input and an output, the input coupled to the secondary winding of the transformer, wherein the power converter is configured to provide a specified voltage and frequency on its output. 4. The phase-controlled power supply of claim 3 wherein the power converter comprises a second switching element and a control signal input configured to accept a second control signal, wherein the power converter switches the second switching element at a controlled frequency and a controlled duty cycle according to the second control signal, and wherein the controller is further configured to provide the second control signal. 5. The phase-controlled power supply of claim 4 wherein the switching of the first switching element, when controlled by the first control signal, and the switching of the second switching element have substantially the same frequency. 6. The phase-controlled power supply of claim 5 wherein the switching of the first switching element, when controlled by the first control signal, and the switching of the second switching element have a selected phase relationship to each other. 7. The phase-controlled power supply of claim 6 wherein the controller is configured to control the switching frequencies, duty cycles, and phase relationship of the first and second switching elements via the first and second control signals to minimize current and voltage variations on the circuits of the power supply. 8. The phase-controlled power supply of claim 1 wherein the transformer comprises a medical-grade isolation transformer. 9. The phase-controlled power supply of claim 1 wherein the power conditioner comprises a power-factor controller. 10. The phase-controlled power supply of claim 3 wherein the power converter comprises an AC-to-DC converter having an input and an output and a DC-to-output converter having an input and an output, wherein the input of the AC-to-DC converter is coupled to the secondary winding of the transformer, the output of the AC-to-DC converter is coupled to the input of the DC-to-output converter, and the output of the DC-to-output converter is coupled to the power output of the power converter. 11. The phase-controlled power supply of claim 10 wherein the output voltage of the AC-to-DC converter is greater than the voltage of the output of the DC-to-output converter. 12. The phase-controlled power supply of claim 3 wherein the power converter output comprises a DC output. 13. The phase-controlled power supply of claim 3 wherein the power converter output comprises an AC output. 14. A phase-controlled UPS, comprising: a power conditioner having an input and an output, the input configured to connect to an external source of electrical power, wherein the power conditioner is configured to provide a DC voltage on its output;a power output module having an input and an output, the input having a minimum input voltage, wherein the power output module is configured to provide a specified voltage at a specified frequency on its output;a DC power bus coupled between the output of the power conditioner and the input of the power output module;a battery; anda power converter having an input coupled to the battery and an output continuously coupled to the DC power bus, wherein the power converter is configured to draw power from the battery and provide a DC voltage on its output that is less than the voltage of the power conditioner output and greater than the minimum input voltage of the power output module. 15. The phase-controlled UPS of claim 14 further comprising a controller coupled to the power conditioner and to the power output module, and wherein the power conditioner and the power output module both comprise one or more switching elements, wherein the controller is configured to control the frequencies, duty cycles, and phase relationship of the switching elements to minimize current and voltage variations on the circuits of the power supply. 16. The phase-controlled UPS of claim 14 wherein the power module comprises a medical-grade isolation transformer. 17. The phase-controlled UPS of claim 14 wherein the power conditioner comprises a power-factor controller. 18. A phase-controlled UPS capable of starting up and operating either without a battery or without an external source of electrical power, comprising: a power conditioner with an input and at least two outputs, the input configured to connect to an external source of electrical power, wherein the power conditioner is configured to provide a specified voltage and frequency on the first output and a DC voltage on the second output;a battery having a voltage less than the DC voltage of the second output of the power conditioner, the battery being coupled to the power conditioner and configured to provide power to the power conditioner;a controller having an input for operational power, coupled to the power conditioner and configured to control the operation of the power conditioner, and further configured to initialize and operate upon the application of power to its operational power input;a power regulator with an input and an output, the input having a specified range of acceptable voltage wherein the battery voltage and the voltage of the second output of the power conditioner are both within the acceptable range, the output coupled to the operational power input of the controller, wherein the regulator is configured to provide power on its output whenever its input is connected to a power source having a voltage within the acceptable range; anda battery switch coupled between the battery and the power regulator input, configured to connect the battery to the power regulator input when the switch is closed;wherein the second output of the power conditioner is coupled to the power regulator input, and the power conditioner is configured to provide the DC voltage on the second output when connected to an external source of electrical power regardless of whether the controller is operating or whether the battery is present or charged; wherein the power regulator will draw power from the second output of the power conditioner when the UPS is connected to an external source of electrical power; and wherein the power regulator will draw power from the battery when the UPS is not connected to an external source of electrical power and the battery switch is closed. 19. The phase-controlled UPS of claim 18 wherein the power conditioner comprises two or more switching elements, and wherein the controller is configured to control the frequencies, duty cycles, and phase relationship of the switching elements to minimize current and voltage variations on the circuits of the power supply. 20. The phase-controlled UPS of claim 18 wherein the power conditioner comprises a medical-grade isolation transformer. 21. The phase-controlled UPS of claim 18 wherein the power conditioner comprises a power-factor controller.
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이 특허에 인용된 특허 (11)
Cathell Franklin J. (Descanso CA) Strickland Bryan E. (San Diego CA), Bi-mode high voltage resonant power supply and method.
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