Patents Assigned to Broadband Telcom Power, Inc.
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Patent number: 6859373Abstract: A switching-mode power converter includes input and output circuits. A transformer having primary and secondary windings which are respectively coupled to the input and output circuits. The secondary winding has two end terminals respectively connected to first and second switches. The first and second switches are also joined together at a common node. The secondary winding also has a mid terminal. A filter circuit is disposed between the mid terminal and the common node. The first and second switches are controlled by complementary control circuits which selectively allow current to orderly pass through the filter circuit via the switches during the forward rectification, resetting, and freewheeling modes of operation of the power converter.Type: GrantFiled: July 6, 2004Date of Patent: February 22, 2005Assignee: Broadband Telcom Power, Inc.Inventors: Xiao Ping Jin, Jian Ping Fan
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Patent number: 6788553Abstract: A switching-mode power converter includes input and output circuits. A transformer having primary and secondary windings which are respectively coupled to the input and output circuits. The secondary winding has two end terminals respectively connected to first and second switches. The first and second switches are also joined together at a common node. The secondary winding also has a mid terminal. A filter circuit is disposed between the mid terminal and the common node. The first and second switches are controlled by complementary control circuits which selectively allow current to orderly pass through the filter circuit via the switches during the forward rectification, resetting, and freewheeling modes of operation of the power converter.Type: GrantFiled: December 28, 2001Date of Patent: September 7, 2004Assignee: Broadband Telcom Power, Inc.Inventors: Xiao Ping Jin, Jian Ping Fan
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Patent number: 6765808Abstract: A power converter includes a transformer disposed between an input circuit and an output circuit. The transformer has primary and secondary windings coupled to the input and output circuit, respectively. Current passing through the input circuit is sensed and fed to a RC (Resistance-Capacitance) circuit which generates a signal proportional in magnitude to the output current sourcing out of the output circuit.Type: GrantFiled: December 17, 2002Date of Patent: July 20, 2004Assignee: Broadband Telcom Power, Inc.Inventors: Xiao Ping Jin, Jian Ping Fan
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Patent number: 6525435Abstract: A power distributing mechanism includes a regulating circuit disposed between at least two circuit portions. The regulating circuit includes bifilar-wound windings electrically coupled to the circuit portions. In a first embodiment, the two circuit portions withdraw power from two separate power sources. The regulating circuit, in response to power withdrawn from the power sources passing through the circuit portions, proportionally allocates the withdrawn power between the circuit portions. In a second embodiment, the two circuits portions withdraw power from a single power source. The two circuit portions serve as redundant reliability backup to each other. In the event of circuit failure in one of the circuit portions, the regulating circuit in response to the failure proportionally allocates power to the remaining functioning circuit portion.Type: GrantFiled: August 13, 2001Date of Patent: February 25, 2003Assignee: Broadband Telcom Power, Inc.Inventors: James L. Lau, Xiao Ping Jin
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Patent number: 6459172Abstract: A power distributing mechanism includes a regulating circuit disposed between at least two circuit portions. The regulating circuit has bifilar-wound windings electrically coupled to the circuit portions. In a first embodiment, the two circuit portions withdraw power from two separate power sources. The regulating circuit, in response to power withdrawn from the power sources passing through the circuit portions, proportionally allocates the withdrawn power between the circuit portions. In a second embodiment, the two circuit portions withdraw power from a single power source. The two circuit portions serve as redundant reliability backup to each other. In the event of circuit failure in one of the circuit portions, the regulating circuit in response to the failure proportionally allocates power to the remaining functioning circuit portion.Type: GrantFiled: March 20, 2001Date of Patent: October 1, 2002Assignee: Broadband Telcom Power, Inc.Inventors: James L. Lau, Xiao Ping Jin
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Patent number: 6366484Abstract: A power conversion arrangement includes a transformer disposed between an input circuit and an output circuit. The transformer has primary and secondary windings coupled to the input and output circuits, respectively. Current passing through the input circuit is sensed and detected by a detecting circuit which generates a signal proportional in magnitude to the output current sourcing out of the output circuit.Type: GrantFiled: October 8, 2001Date of Patent: April 2, 2002Assignee: Broadband Telcom Power, Inc.Inventor: Xiao Ping Jin
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Publication number: 20020011751Abstract: A power distributing mechanism includes a regulating circuit disposed between at least two circuit portions. The regulating circuit includes bifilar-wound windings electrically coupled to the circuit portions. In a first embodiment, the two circuit portions withdraw power from two separate power sources. The regulating circuit, in response to power withdrawn from the power sources passing through the circuit portions, proportionally allocates the withdrawn power between the circuit portions. In a second embodiment, the two circuits portions withdraw power from a single power source. The two circuit portions serve as redundant reliability backup to each other. In the event of circuit failure in one of the circuit portions, the regulating circuit in response to the failure proportionally allocates power to the remaining functioning circuit portion.Type: ApplicationFiled: August 13, 2001Publication date: January 31, 2002Applicant: Broadband Telcom Power, Inc.Inventors: James L. Lau, Xiao Ping Jin
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Patent number: 6329726Abstract: A power distributing mechanism includes a regulating circuit disposed between at least two circuit portions. The regulating circuit includes bifilar-wound windings electrically coupled to the circuit portions. In a first embodiment, the two circuit portions withdraw power from two separate power sources. The regulating circuit, in response to power withdrawn from the power sources passing through the circuit portions, proportionally allocates the withdrawn power between the circuit portions. In the second embodiment, the two circuits portions withdraw power from a single power source. The two circuit portions serve as redundant reliability backup to each other. In the event of circuit failure in one of the circuit portions, the regulating circuit in response to the failure proportionally allocates power to the remaining functioning circuit portion.Type: GrantFiled: March 3, 2000Date of Patent: December 11, 2001Assignee: Broadband Telcom Power, Inc.Inventors: James Leych Lau, Xiao Ping Jin
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Patent number: 6141230Abstract: A valley-fill power factor correction circuit includes a rectifying circuit connected to a charge storage circuit. There is a voltage doubler circuit disposed between the rectifying circuit and the charge storage circuit. The voltage doubler circuit performs the function of filling the normally truncated input current waveform. As arranged, the input current waveform can be substantially maintained with less distortion resulting in a Fourier transform in compliance with the IEC specifications. The valley-fill circuit of the invention is capable of achieving a high power factor.Type: GrantFiled: July 13, 1998Date of Patent: October 31, 2000Assignee: Broadband Telcom Power, Inc.Inventor: K. Kit Sum