Power supply interface apparatus for communication facilities at a power station
First Claim
1. A power supply unit for operating isolated electronic equipment in a high voltage environment including high voltage ground faults, comprising communication lines adapted to be connected to said electronic equipment and to a remotely located communication unit having a ground system connected to said lines, a motor having a rotary output and adapted to be powered directly from a protected power system, an alternator having a rotary input and adapted to establish an output voltage for operating of said electronic equipment, a non-metallic coupling unit formed of a high dielectric electrical insulator and connected to said rotary output of said motor and to said rotary input of said alternator to electrically isolate said motor and said alternator with a sufficient isolation to withstand said high voltages including said high voltage ground faults created in the high voltage environment.
2 Assignments
0 Petitions
Accused Products
Abstract
A power supply board for connecting dry communication lines from a remote station to the electronic equipment at a power station and includes a brushless PM motor mounted in a motor section of the board. The motor is powered by a station-derived low voltage direct current source provided at the power station. A brushless PM generator is mounted in a spaced alternator section on the board. The motor and generator shafts are connected by a flexible tube for generating a voltage suitable for operating of the electronic equipment at the power station. An integrated motor drive circuit is mounted on the motor section and connected to the D.C. source via a protective circuit. The motor has a bank of Hall cell sensors for generating position control signals to the circuit for sequential energization of the three phase motor winding. The output of the alternator is rectified to establish an output voltage for operating the communication equipment. A voltage sampling circuit is coupled to the rectified output and connected by electrical/optical isolators and a fiber optic feedback line to the integrated circuit to create a closed loop system establishing a constant output voltage for operating the equipment.
24 Citations
23 Claims
- 1. A power supply unit for operating isolated electronic equipment in a high voltage environment including high voltage ground faults, comprising communication lines adapted to be connected to said electronic equipment and to a remotely located communication unit having a ground system connected to said lines, a motor having a rotary output and adapted to be powered directly from a protected power system, an alternator having a rotary input and adapted to establish an output voltage for operating of said electronic equipment, a non-metallic coupling unit formed of a high dielectric electrical insulator and connected to said rotary output of said motor and to said rotary input of said alternator to electrically isolate said motor and said alternator with a sufficient isolation to withstand said high voltages including said high voltage ground faults created in the high voltage environment.
- 2. A power supply unit for operating isolated electronic equipment in a high voltage environment, comprising a motor having a rotary output and adapted to be powered directly from a protected power system, an alternator having a rotary input and adapted to establish an output voltage for operating of said electronic equipment, a non-metallic coupling unit connected to said rotary output of said motor and to said rotary input of said alternator to electrically isolate aid motor and said alternator with a sufficient isolation to withstand high voltages created in the high voltage environment, and a closed loop system connected between the output of the alternator and the input to the motor to establish a regulated output voltage, said closed loop system including a drive control unit at the motor and a feedback signal unit at the alternator, and an optic-fiber link between said drive control unit and said feedback signal unit to maintain said electrical isolation between said motor and said alternator.
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11. A power distribution station for distributing a high voltage over a distribution line system and wherein said distribution lines are subject to ground fault conditions and having low voltage electronic loads mounted within the power station and subject to extraneous voltage and current flow within said power station, the improvement in a low voltage power supply for operating said electronic loads, comprising a motor having an input adapted to be powered from power of the power station and having a rotating output shaft, an alternator mounted in spaced relation to said motor and having a rotating input shaft, a coupling unit connecting said motor shaft to said alternator shaft for driving of said alternator, said coupling unit including a high dielectric member, an electronic control unit connected to said motor for varying the output of the motor and thereby the electrical output of the generator, a feedback signal source coupled to the output of said alternator and establishing a signal proportional to the output of the alternator, opto-isolators coupled to said feedback signal source and to said control circuit and interconnected to each other by an optical fiber whereby said motor and its control and said generator and its output circuit are solely connected by and electrically isolated from ground fault voltages in said power station as a result of said high dielectric member and said optical fiber.
- 12. A power station communication system for interconnection of low voltage communication equipment to a remote communication source over dry communication lines, comprising a support housing having a plurality of card slots for communication interface circuit boards, a plurality of communication of interface circuit boards releasably mounted within said slots for interconnecting of low voltage communication equipment to incoming dry lines, said interface circuit boards including means for transmitting of communication signals received over said dry lines, said communication interface circuit boards including devices requiring a low voltage supply, a remote power supply circuit board releasably mounted within a card slot in said housing and including an input terminal unit adapted to receive a low voltage input and an output terminal unit located in spaced relation to said input terminal unit for supplying power to said communication boards, said remote power supply circuit board including a motor section on said board adjacent said input terminal unit and an alternator section located on said board adjacent said output terminal unit, said alternator section located in physically spaced relation to said motor section and defining an electrical isolating gap between said motor section and said alternator section, a rotary D.C. motor mounted on said board in said motor section and having a rotating output shaft within said motor section and extended toward said alternator section, an alternator mounted to said board in said alternator section and having a rotary input shaft within said alternator section and said rotary input shaft extended toward and aligned with said motor shaft, a high dielectric coupling secured to said motor shaft and to said alternator shaft and providing an electrically isolated drive coupling from said motor to said alternator for developing a low voltage A.C. output from said alternator, a D.C. rectifying unit coupled to the output of said alternator and mounted to said circuit board within said alternator section and having output lines connected to said output terminals.
- 19. A remote power supply apparatus for supplying a low voltage to low voltage electronic loads mounted within a power supply station and subject to extraneous voltage and current flow within said power supply station and wherein said power supply station includes high voltage distribution lines and wherein said distribution lines are subject to high voltage ground fault conditions on the order of thousands of volts, comprising a data communication system including said electronic loads, wire lines connected between the electronic loads and a remote location having a ground system connected to said wire lines, a power supply unit including a rotary motor having an input adapted to be powered from said power supply station and having a rotating output, a remote supply unit including a rotary alternator mounted in spaced and electrically insulated relation to said motor and having a rotating input shaft, an elongated coupling member having a first end fixed to said motor shaft and a second end fixed to said alternator shaft, said coupling member being formed of a high dielectric material connecting and electrically isolating said motor shaft to said alternator shaft for driving of said alternator.
Specification