Medium voltage power controller
First Claim
Patent Images
1. A system comprising:
- a compressor, a condenser and an evaporator in fluid communication, the compressor, condenser and evaporator being mounted to form an integral unit;
a motor connected to the compressor to drive the compressor, the motor being mounted on the unit, the motor being powered by a voltage greater than 600 volts and less than 25,000 volts;
a variable speed drive, the variable speed drive being operable to provide a variable current and variable voltage to the motor to operate the motor at variable speeds, the variable speed drive comprising;
a first enclosure mounted on the unit near the motor;
a second enclosure mounted next to the unit;
an inverter electrically connected to the motor, the inverter being mounted in the first enclosure; and
a disconnect switch connected to a supply voltage for the variable speed drive, the disconnect switch being mounted in the second enclosure.
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Accused Products
Abstract
A medium voltage power controller box is mounted on a chiller unit with the other components of the chiller system. The power controller box can be positioned on the chiller system unit to permit the power controller box to be close coupled to the motor, and specifically to the main motor lead exit hub without the need for any power conduit connections between the power controller box and the motor. In addition, the power controller box also does not require any control interface and receives controls from a control panel. A short conduit connection between the control panel and the power controller box is used to provide the necessary connections between the control panel and the power controller box.
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Citations
20 Claims
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1. A system comprising:
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a compressor, a condenser and an evaporator in fluid communication, the compressor, condenser and evaporator being mounted to form an integral unit; a motor connected to the compressor to drive the compressor, the motor being mounted on the unit, the motor being powered by a voltage greater than 600 volts and less than 25,000 volts; a variable speed drive, the variable speed drive being operable to provide a variable current and variable voltage to the motor to operate the motor at variable speeds, the variable speed drive comprising; a first enclosure mounted on the unit near the motor; a second enclosure mounted next to the unit; an inverter electrically connected to the motor, the inverter being mounted in the first enclosure; and a disconnect switch connected to a supply voltage for the variable speed drive, the disconnect switch being mounted in the second enclosure. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A system comprising:
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a compressor, a condenser and an evaporator in fluid communication; the compressor, condenser and evaporator being mounted as a structure; a motor connected to the compressor to drive the compressor, the motor being mounted on the structure, the motor being powered by a voltage greater than 600 volts; a control panel being mounted on the structure; a variable speed drive controlled by the control panel, the variable speed drive being configured to provide voltages to the motor in a range between 600 volts and 25,000 volts to operate the motor at variable speeds, the variable speed drive comprising; at least one box mounted on the structure; a rectifier, a DC link and an inverter mounted in the at least one box; and the rectifier comprising an electrical switching arrangement, the electrical switching arrangement having a plurality of switches being opened and closed to convert AC power to DC power. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20)
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Specification