Patent
Controller for motor
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TLDR
In this article, a controller is provided which interfaces with a variable frequency drive and a motor, the controller having one or more voltage and current sensors which can interface with a power line linking the variable frequency driver and the motor.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.read more
Citations
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References
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Journal ArticleDOI
Rotor position and velocity estimation for a salient-pole permanent magnet synchronous machine at standstill and high speeds
M.J. Corley,R.D. Lorenz +1 more
TL;DR: In this paper, a simple-to-implement estimation technique that operates over a wide speed range, including zero speed, was proposed to decouple the inherent cross-coupling in salient-pole permanent magnet synchronous motors.
Journal ArticleDOI
Sensorless control strategy for salient-pole PMSM based on extended EMF in rotating reference frame
TL;DR: In this paper, a sensorless control strategy for a salient-pole permanent magnet synchronous motor (PMSM) using an extended electromotive force (EMF) in the rotating reference frame is presented.
Patent
Systems and methods of electric motor control
Kenyon M. King,Kiet Binh To +1 more
TL;DR: In this paper, a motor controller is adapted to respond to a commutation signal, a pulse, or both in conjunction with a sensing device, such as an EMF detector or an optical encoder.
Journal ArticleDOI
Position and speed control of brushless DC motors using sensorless techniques and application trends.
TL;DR: In this paper sensorless advances are reviewed and recent developments in this area are introduced with their inherent advantages and drawbacks, including the analysis of practical implementation issues and applications.
Patent
Electric submersible pumps
TL;DR: In this paper, a method of pumping wellbore fluid, comprising the steps of installing an electric submersible pump in a well-bore; and operating the pump at more than 4,500 rpm to pump the fluid, is described.