发明名称 |
METHOD AND APPARATUS FOR CONTROL OF A SYNCHRONOUS PERMANENT MAGNET MOTOR, PARTICULARLY OVER A LONG CABLE IN A WELL |
摘要 |
A synchronous permanent magnet motor is controlled independently of position sensing means by determining the system parameters including the motor impedance and back-emf and the cable impedance and supplying power according to a predefined voltage : frequency ratio which is determined based on said system parameters to provide a desired rate of acceleration determined by the supply voltage. |
申请公布号 |
WO2012010908(A2) |
申请公布日期 |
2012.01.26 |
申请号 |
WO2011GB51402 |
申请日期 |
2011.07.22 |
申请人 |
ARTIFICIAL LIFT COMPANY LIMITED;HEAD, PHILIP;MANSIR, HASSAN |
发明人 |
HEAD, PHILIP;MANSIR, HASSAN |
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