PERMANENT MAGNET SYNCHRONOUS MOTOR AND DRIVE SYSTEM
First Claim
1. A vapor compression system comprising:
- a compressor, a condenser and an evaporator connected in a closed refrigerant loop;
a motor connected to the compressor to power the compressor, the motor comprising;
a first rotor portion and a first stator portion configured as a permanent magnet motor;
a second rotor portion and a second stator portion configured as a reluctance motor, the second rotor portion comprising a reluctance-type rotor, and the second stator portion comprising electromagnetic windings capable of inducing a rotary magnetic field;
the first rotor portion and the second rotor portion attached to a common drive shaft of the compressor; and
a controller configured to operate the reluctance motor to generate start-up torque and initiate rotation of the drive shaft until the drive shaft achieves a predetermined rotational speed and to operate the permanent magnet motor to rotate the drive shaft between the predetermined rotational speed and a maximum rotational speed.
2 Assignments
0 Petitions
Accused Products
Abstract
A hybrid motor for powering a compressor of a chiller system includes a first rotor portion and a first stator portion configured as a permanent magnet motor and a second rotor portion and a second stator portion configured as a reluctance motor. The second rotor portion includes a reluctance-type rotor, and the second stator portion includes electromagnetic windings capable of inducing a rotary magnetic field. The first rotor portion and the second rotor portion are attached to a common drive shaft. The reluctance motor is arranged to generate start-up torque and initiate rotation of the drive shaft until the drive shaft achieves a predetermined rotational speed. The permanent magnet motor is arranged to power the drive shaft between the predetermined rotational speed and a maximum rotational speed.
47 Citations
21 Claims
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1. A vapor compression system comprising:
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a compressor, a condenser and an evaporator connected in a closed refrigerant loop; a motor connected to the compressor to power the compressor, the motor comprising; a first rotor portion and a first stator portion configured as a permanent magnet motor; a second rotor portion and a second stator portion configured as a reluctance motor, the second rotor portion comprising a reluctance-type rotor, and the second stator portion comprising electromagnetic windings capable of inducing a rotary magnetic field; the first rotor portion and the second rotor portion attached to a common drive shaft of the compressor; and a controller configured to operate the reluctance motor to generate start-up torque and initiate rotation of the drive shaft until the drive shaft achieves a predetermined rotational speed and to operate the permanent magnet motor to rotate the drive shaft between the predetermined rotational speed and a maximum rotational speed. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A hybrid motor for powering a compressor of a chiller system, the hybrid motor comprising:
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a first rotor portion and a first stator portion configured as a permanent magnet motor; a second rotor portion and a second stator portion configured as a reluctance motor, the second rotor portion comprising a reluctance-type rotor, and the second stator portion comprising electromagnetic windings capable of inducing a rotary magnetic field; the first rotor portion and the second rotor portion attached to a common drive shaft; and the reluctance motor being operated to generate start-up torque and initiate rotation of the drive shaft until the drive shaft achieves a predetermined rotational speed and the permanent magnet motor being operated to power the drive shaft between the predetermined rotational speed and a maximum rotational speed. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21)
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Specification