Can an electric motor run a hydraulic pump?

Can an electric motor run a hydraulic pump?

As can be seen, motor torque corresponds to hydraulic pressure, and motor rpm corresponds to pump flow. In a hydraulic-based, mobile system, a diesel engine (or any IC engine) drives a hydraulic pump to create hydraulic power. That electric power is now used to run an electric motor, which now drives a hydraulic pump.

What is the difference between the electric motor and the hydraulic motor?

Electric motors can generate tremendous amounts of torque without the losses associated with torque-multiplying gear systems. Hydraulic motors can generate equally tremendous amounts of torque at a fraction of the size. Some hydraulic motors have been specifically designed high torque and power density.

What is one advantage of hydraulic motors over electric motors?

An hydraulic actuator can perform across a much broader range of force and speed specifications than an electrically powered one of similar size. The hydraulic motor maintains torque and force at constant rates, without needing a pump to supply added fluid to increase pressure.

Which motor is used in hydraulic press?

Piston-type motors are the most commonly used in hydraulic systems. They are basically the same as hydraulic pumps, except they are used to convert hydraulic energy into mechanical (rotary) energy. See Figure 6-12.

How much HP does it take to run 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 does electric over hydraulic pump work?

Electric motor-driven hydraulic pumps convert electrical energy to hydraulic power. The electric motor, powered by an AC or DC current, spins a drive shaft. The drive shaft is coupled to the hydraulic pump which converts low-pressure fluid to high-pressure fluid.

Why is hydraulic better than electric?

Hydraulic actuators can lift and hold heavy loads without braking, and can move heavy objects at slow speeds or apply torque without the need for gearing, while consuming less space and producing less heat at the actuator than electric motors. In fluid power systems, the air or hydraulic pump may be located remotely.

Is hydraulic better than electric power?

For tough tasks, hydraulic drives can be more energy efficient than electric motors. It’s no secret that the power source for machine motion can greatly impact the amount of energy a machine consumes. Conventional wisdom holds that electric drives are more efficient than their fluid-power counterparts.

How do I calculate the engine capacity of 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 to choose the right hydraulic motor for your machine?

If the existing machine is powered with an electric motor and the new machine with a hydraulic motor, and if high starting torque is required, the hydraulic motor must be selected by comparing its starting torque with the starting torque of the electric motor on the existing machine.

How much power does it take to drive a hydraulic pump?

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. This power is consumed in bearing losses and fluid flow losses. The motor most often used to drive a hydraulic pump is a 3-phase, induction-type, Design B motor.

How to determine the running torque of a hydraulic motor?

By referring to a torque/current performance curve for the motor, the running torque can be determined with a fair degree of accuracy. Then, a hydraulic motor can be selected and the system PSI can be established which will give the required running torque. Of course the electric motor speed should approximate the maximum running speed of the load.

How do you calculate horsepower for a positive displacement hydraulic pump?

Figures in the body of this table show the horsepower needed to drive a positive displacement hydraulic pump, and would be valid either for electric motor or engine drive. The table was calculated from the formula: HP = PSI x GPM + (1714 x 0.85). assuming a pump efficiency of 85%, which would be representative of most positive displacement pumps.