How do you choose an electric motor for a hydraulic pump?
How do you choose an electric motor for a hydraulic pump?
If you calculate 20 GPM @ 300 PSI with an assumed overall efficiency of 89%, you would probably select a 5 Hp electric motor. However, if you calculate the same 20 GPM @ 300 PSI with the actual overall efficiency of 50%, you would know that you should be using a 7.5 Hp motor.
How do you determine the size of an electric motor to run a hydraulic pump?
If system pressure and flow are constant, motor sizing simply involves the standard equation: hp = (Q ×P) ÷ (1,714×EM ), where: hp is horsepower, Q is flow in gpm, P is pressure in psi, and EM is the pump’s mechanical efficiency.
How do you calculate horsepower in a hydraulic motor?
HP needed to drive hydraulic pump SImply take the gallons per minute (GPM) multiplied by the pump pressure PSI then divide that number by the result of 1,714 times efficiency (we used 85% effiencey in this case). Or just use the online calculator and let us do the hard work!
How fast can a hydraulic motor spin?
This type of motor is the most commonly used in hydraulic systems. These motors are, like their pump counterparts, available in both variable and fixed displacement designs. Typical usable (within acceptable efficiency) rotational speeds range from below 50 rpm to above 14000 rpm.
How big of an electric motor do you need for a hydraulic pump?
1 HP is required for each 1 GPM at 1500 PSI or any multiple of 1500 such as 3 GPM at 500 PSI, 2 GPM at 750 PSI, 1/2 GPM at 3000 PSI, etc. Another handy rule-of-thumb is that it takes about 5% of the pump maximum rated HP to drive the pump when unloaded and pressure is very low.
How is the horsepower of a hydraulic motor calculated?
Mechanical HP is calculated as follows: 15,000 lbs. is force to move load; 180 ft. is distance traveled in one minute (computed from 3 ft/sec); 1 represents a time of 1 minute. Drum RPM is computed from Formula (D) in box; input speed for the hydraulic motor is computed as described above in this column.
Can a hydraulic motor be matched to an electric motor?
Hydraulic pump and motor must work as a team. For optimum performance, the pump and motor must be correctly matched. An electric motor is relatively easy to select because, at any given horsepower, there are only a few fixed speeds from which to choose, and it does not have to be matched to the alternator which supplies the power.
How big is a 60 Hz hydraulic pump motor?
Characteristic 60 Hz Motor on 50 Hz Line 50 Hz Motor on 60 Hz Line HP will be: 16-2/3 less 20% more Adjust voltage to:* 16-2/3 less 20% more Full load torque: Same Same Breakdown torque: Same Same
How big of a motor do you need for a hydraulic pump?
However, if you calculate the same 20 GPM @ 300 PSI with the actual overall efficiency of 50%, you would know that you should be using a 7.5 Hp motor. In this example, making an assumption about the efficiency of your pump could result in installing a motor that is too large, driving up your overall operating cost.
Mechanical HP is calculated as follows: 15,000 lbs. is force to move load; 180 ft. is distance traveled in one minute (computed from 3 ft/sec); 1 represents a time of 1 minute. Drum RPM is computed from Formula (D) in box; input speed for the hydraulic motor is computed as described above in this column.
Hydraulic pump and motor must work as a team. For optimum performance, the pump and motor must be correctly matched. An electric motor is relatively easy to select because, at any given horsepower, there are only a few fixed speeds from which to choose, and it does not have to be matched to the alternator which supplies the power.
How much torque does a motor develop at 1, 200 psi?
Example: How much torque does a motor develop at 1,200 psi, 1500 rpm, with 10 gpm input? This company assumes no liability for errors in data nor in safe and/or satisfactory operation of equipment designed from this information. Have a Question?
