Medium voltage variable speed drive for a chiller unit
First Claim
Patent Images
1. A system comprising:
- a compressor, a first heat exchanger and a second heat exchanger, the compressor, first heat exchanger and second heat exchanger being mounted together to form a structure;
a motor connected to the compressor to power the compressor, the motor being mounted on the structure, the motor being operated at a voltage greater than 600 volts;
a box comprising at least one power section of a variable speed drive used in operating the motor; and
the box being mounted on the structure near the motor to permit a close coupling of electrical connections between the at least one power section of the variable speed drive and the motor without a power conduit connection between the box and the motor.
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Accused Products
Abstract
A single medium voltage starter box is mounted on a chiller unit with the other components of the chiller system. The starter box can be positioned on the chiller system unit to permit the starter 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 starter box and the motor. In addition, the starter 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 starter box is used to provide the necessary connections between the control panel and the starter box.
41 Citations
20 Claims
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1. A system comprising:
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a compressor, a first heat exchanger and a second heat exchanger, the compressor, first heat exchanger and second heat exchanger being mounted together to form a structure; a motor connected to the compressor to power the compressor, the motor being mounted on the structure, the motor being operated at a voltage greater than 600 volts; a box comprising at least one power section of a variable speed drive used in operating the motor; and the box being mounted on the structure near the motor to permit a close coupling of electrical connections between the at least one power section of the variable speed drive and the motor without a power conduit connection between the box and the motor. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A unit comprising:
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a first heat exchanger shell and a second heat exchanger shell positioned next to the first heat exchanger shell, the first heat exchanger shell being connected to the second heat exchanger shell; a compressor mounted on at least one of the first heat exchanger shell or the second heat exchanger shell; a motor connected to the compressor to drive the compressor, the motor being mounted on at least one of the first heat exchanger shell or the second heat exchanger shell; a variable speed drive connected to the motor to power the motor, the variable speed drive providing an output voltage to the motor greater than 600 volts, the variable speed drive being mounted on at least one of the first heat exchanger shell or the second heat exchanger shell; wherein the variable speed drive is mounted on the at least one of the first heat exchanger shell or the second heat exchanger shell to permit a close coupling of electrical connections between the variable speed drive and the motor without a power conduit connection between the variable speed drive and the motor. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
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17. A system comprising:
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a compressor, a condenser and an evaporator, the compressor, condenser and evaporator being integrally mounted to form a unit; a motor connected to the compressor to drive the compressor, the motor being mounted on the unit; a control panel to control operation of the system, the control panel being mounted on the unit; an enclosure being mounted on the unit adjacent to the motor, the enclosure comprising a variable speed drive, the variable speed drive being operable to provide a voltage greater than 600 volts to the motor; the control panel being operable to provide control instructions to the variable speed drive; and the enclosure being mounted on the unit to permit a close coupling of electrical connections between the enclosure and the motor without a power conduit connection between the enclosure and the motor. - View Dependent Claims (18, 19, 20)
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Specification