Cooling capacity flow
The heat output to be dissipated Pc of a flow rate Q is calculated from the temperature difference at inlet and outlet, the specific heat capacity of the medium c (~1.88 kJ/(kg*K) for Oil, ~4.18 kJ/(kg*K)
Pressure switches
load (DIN ISO 1219-1). They are generally used if an electrical switching command or status signal should be issued when a set (pre-selected) pressure value is reached and exceeded, to trigger an immediately [...] immediately following work cycle (actuation of an electromagnetic directional valve) or to end a cycle sequence (deactivation of the pump motor, neutral position of an electromagnetic directional valve). They [...] are only suitable for low pressures. Piston switches can also be designed for high pressures, but due to the sealing friction they have a hysteresis . In the case of an electro-mechanical pressure switch
Control with throttle
not required Q V (Q V = Q 1 – Q N) is fed back to the tank (Figure D 47) . The power converted into heat at the throttling point on the 3-way flow control valve is proportional to the product of Q v and the [...] pressure . In addition there is also the loss on relieving the useful flow Q N from the nominal pressure to the load pressure (Figure D 48) : If, despite these relatively high losses, control with throttle is [...] because it is relatively cheap (constant pumps) and because it has a very high dynamic performance (up to a few hundred Hz for control with throttle using servo valves). Alternative: Pump control
Address
between memory areas does not need to be defined by the technical layout of the memory, instead it can also be defined by other, changing requirements (EDIN 44 300 Part 1).
Single acting cylinder
which the fluid pressure for the forward stroke only acts in one and the same direction ( ISO 1219-1 ). The piston can be returned by a spring, the inherent weight of the piston or external force. In principle [...] with plunger pistons . However they can also be formed by the single sided application of pressure to a differential piston .
Three chamber valve
channels in the housing for the three ports A, B and P (Figure D 42) . The 4th port T is to the spring chambers F1 and F2 that are connected together via a connecting channel (a). The disadvantage of this
Binary
correct/incorrect, on/off, O/ L or 0/1. The binary numerical system has the base 2. With n binary signals it is possible to define 2n states. Therefore, e.g., with n = 8 = 28 there are 256 possible states
Operating system
1. program in a digital computer system that together with the characteristics of the computer system forms the basis for the possible operating modes of the digital computer system and in particular controls [...] present in memory, independent of the current usage of the computer so that the user can actually "talk" to the device.
Corner frequency fE
On systems that correspond to a 1st degree differential equation, the corner frequency is the intersection of the horizontal asymptote with the asymptote on the falling branch in a Bode diagram (see amplitude
Solenoid
In fluid technology electro-mechanical used to actuate valves are often referred to as solenoids. These are not permanent magnets, but are electromagnets. An electrical input signal (voltage or current) [...] positions, i.e. the valves operated by them are switched from one position to another. If the mechanical output signal is to be changed continuously, proportional or control solenoids are required. All [...] All three types of solenoid common today apply a compressive force. The return to the initial position is generally via spring force. In fluid technology DC solenoids (voltage or current) and AC solenoids