Controller for motor
First Claim
1. A controller configured to interface with a variable frequency drive and a motor, the controller comprising:
- (a) one or more voltage and current sensors configured to interface with a power line linking the variable frequency drive and the motor; and
(b) a signal interface module configured to receive one or more electrical signals associated with an operating condition of the motor from the one or more voltage and current sensors, the signal interface module being configured to correlate the received electrical signals with a rotor position of the motor, and to transmit signals corresponding to rotor position or operating commands, to the variable frequency drive.
3 Assignments
0 Petitions
Accused Products
Abstract
A controller is provided which can interface with a variable frequency drive and a motor, the controller having (a) one or more voltage and current sensors which can interface with a power line linking the variable frequency drive and the motor; and (b) a signal interface module which can receive electrical signals associated with an operating condition of the motor from the one or more voltage and current sensors. The signal interface module can correlate the received electrical signals with a rotor position of the motor, and transmit signals corresponding to rotor position, to the variable frequency drive. The data provided by the controller if conveyed as a rotor position, may cause the variable frequency drive to change one or more of its operating parameters to maintain proper synchronization of the rotor and its associated stator currents. Alternatively, the controller may directly control variable frequency drive operating parameters.
41 Citations
26 Claims
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1. A controller configured to interface with a variable frequency drive and a motor, the controller comprising:
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(a) one or more voltage and current sensors configured to interface with a power line linking the variable frequency drive and the motor; and (b) a signal interface module configured to receive one or more electrical signals associated with an operating condition of the motor from the one or more voltage and current sensors, the signal interface module being configured to correlate the received electrical signals with a rotor position of the motor, and to transmit signals corresponding to rotor position or operating commands, to the variable frequency drive. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A system comprising:
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a variable frequency drive linked via a power line to a motor; and a controller interfacing with the variable frequency drive and the motor, the controller comprising; (a) one or more voltage and current sensors interfaced with the power line linking the variable frequency drive and the motor; (b) a signal interface module configured to receive one or more electrical signals associated with an operating condition of the motor from the one or more voltage and current sensors, the signal interface module being configured to correlate the received electrical signals with a rotor position of the motor, and to transmit signals corresponding to the rotor position or operating commands to the variable frequency drive. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21)
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22. A method of operating a motor driven by a variable frequency drive, the method comprising:
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(a) receiving at a signal interface module of a controller interfaced with the variable frequency drive and the motor, one or more electrical signals associated with an operating condition of the motor from one or more power line voltage and current sensors interfaced with a power line linking the variable frequency drive and the motor, the signal interface module being configured to correlate the received electrical signals with a rotor position of the motor, and to transmit signals corresponding to the rotor position or operating commands to the variable frequency drive; and (b) changing one or more operating parameters of the variable frequency drive in response to the signal transmitted by the controller to the variable frequency drive. - View Dependent Claims (23, 24, 25, 26)
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Specification