Hydraulic power is often controlled by throttling, almost like controlling the speed of your car with its brakes, instead of the gas pedal. We believe that hydraulics deserve a better alternative. The new developed Hydraulic transformer allows to control hydraulic power (pressure and flow) without the considerable energy losses, now connected to throttling in control valves.
The IHT can transform hydraulic energy. This means that the output pressure can also be higher than the input pressure from the common pressure rail. A flow at a relative low pressure can be transformed to a smaller flow at a higher pressure. This offers the opportunity to amplify pressure, without having to change the pump.
Instead of dissipating hydraulic energy the IHT transforms hydraulic energy. In case a lower pressure is needed then delivered by the pump, the transformer takes care of this without dissipating energy. The transformer absorbs the necessary hydraulic power and delivers this power at the required pressure and flow, similar to an electric transformer that transforms voltage and current.
The transformer offers the option to recuperate energy to the common pressure rail. For example when a forklift truck lowers a load, this energy represented by the load can be converted to the pressure rail, and stored in a hydraulic accumulator. Refer to our Hydrid page for more details on the drive system.
The transformer combines the functions of pump and a motor in one design. Therefore the transformer port plate has three ports instead of two. One is connected to the high pressure line. This kidney delivers the power when a load requires flow with a certain pressure. A second kidney is connected to the load. The third is connected to the low pressure line.
The transformer has a very high dynamic response. It allows for very direct and responsive control of loads, almost independent of the accumulator pressure.
The control of the transformer itself requires minimal force, and allows for using a direct electronic control.
Innas passed the most critical development stages for the transformer. The basic principle was proven in a bent axis design, followed by prototypes on basis of the efficient and low noise Floating Cup design. The prototypes were also implemented in applications, such as lift trucks, off-road machinery and automotive applications.
Currently we are involved in the development of the 4th generation Floating Cup transformers. This design is suited for integration in applications such as mobile machinery. The development program is open for participation and co-operation with OEM's and industries with a strategic interest. Please contact us for further details.