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Sucker Rod Pump is a prevalent industrial solution in artificial lift applications in oil industries. Linear motors are becoming more popular as they are applied in new applications in various fields. Linear motors may be employed in artificial lift systems by placing a linear motor downhole to drive the reciprocating pump directly. This system is intended to extend the application of reciprocating...
Linear Electric Submersible Pump is a new industrial solution in artificial lift applications. Linear motors are placed downhole to drive the reciprocating pump directly. This system is intended to overcome some of the sucker rod pump limitations. The new configuration will allow implementation in deviated and off-shore oil wells. Integrated Drive-Motor technology shows many promising advantages....
Electric Submersible Pumps are a widespread industrial solution for artificial lift applications in oil industries. Linear motors are becoming more popular as they are applied for new applications in various fields. Integrated Drive-Motor technology shows many promising advantages. In this paper, a system which combines these three technologies for marginal oil wells application is discussed. This...
This paper studies the dynamic performance of an electric machine integrated with the transrotary magnetic gear (MITROMAG) in a motoring mode of operation. MITROMAG is formed by mechanically coupling a rotary electric machine to the rotor of a trans-rotary magnetic gear (TROMAG). TROMAG is a magnetic device that, through magnetic fields, converts a low-torque, high-speed rotation of its rotor to a...
A method to determine the shaft position of a tubular linear permanent magnet motor is presented. Instead of using an incremental optical or magnetic encoder, linear Hall Effect sensors could be used to determine the exact shaft position. This will reduce the cost, size and remove the trailing sensor cable. A Phased Locked Loop was proposed to reduce the noise in the signals. Experimental results...
A sensorless control method of a tubular linear permanent magnet motor is presented. The sensorless algorithm is based on back-EMF estimation and consists of two observer stages. First, the back-EMF vector is estimated using a modified disturbance observer. Next, a Phased Locked Loop (PLL) tracking observer is implemented to extract the position from the back-EMF vector. The algorithm does not require...
Induction motors are commonly used in numerous industrial applications. To maintain a reliable operation of the motor, it is important to identify the potential faults that may cause the motor to fail. Bearing failures are one of the main causes of motor breakdown. In some cases, bearings fail due to the electric current passing through them. In this paper, bearing currents in inverter driven five-phase...
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