When does the motor run higher than the pump speed?
Independent events are seldomly independent. The 1765 RPM is the motor RPM at rated full load of 10HP. WHen the motor is not required to deliver full load, the RPM will be higher. Since your pump rated power is 7.3 HP, the motor will run at higher than 1765 RPM.
How is the torque speed of a pump determined?
Like pumps, motors produce a torque-speed curve of their own. By overlaying the torque-speed curve of a pump and a motor, one can verify that the motor is producing enough accelerating torque to drive the pump to full speed, as shown below. In this overlay the shaded area reflects the accelerating torque available from the motor to drive the pump.
Why is no load speed lower than pump speed?
The larger kW motor will have speed closer to the synchronous speed and vise vesa. For induction motor,the No load speed will still be below the synchronous speed by a few RPM. If your motor is an asynchronous motor/induction motor (IM), this is called slip.
Can a motor with 10HP drive a centrifugal pump?
Can a motor with 10HP, rotor speed of 1765 rpm having synchronous speed of 1800 rpm drive a centrifugal pump with 1770 rpm and rated power of 7.3HP? Motor rotor speed is less than pump speed but can the motor accelerate the pump to its rated speed?
Independent events are seldomly independent. The 1765 RPM is the motor RPM at rated full load of 10HP. WHen the motor is not required to deliver full load, the RPM will be higher. Since your pump rated power is 7.3 HP, the motor will run at higher than 1765 RPM.
Can a motor with 10HP, rotor speed of 1765 rpm having synchronous speed of 1800 rpm drive a centrifugal pump with 1770 rpm and rated power of 7.3HP? Motor rotor speed is less than pump speed but can the motor accelerate the pump to its rated speed?
The larger kW motor will have speed closer to the synchronous speed and vise vesa. For induction motor,the No load speed will still be below the synchronous speed by a few RPM. If your motor is an asynchronous motor/induction motor (IM), this is called slip.
Like pumps, motors produce a torque-speed curve of their own. By overlaying the torque-speed curve of a pump and a motor, one can verify that the motor is producing enough accelerating torque to drive the pump to full speed, as shown below. In this overlay the shaded area reflects the accelerating torque available from the motor to drive the pump.
