摘要:
Device and method for operation of at least one electrical machine for a motor vehicle. In order to coordinate torque requirements for the propulsion system and voltage requirements for the vehicle power supply system and at least one battery for the vehicle power supply system, a voltage reference variable is formed for the voltage requirements for the vehicle power supply system, and a torque reference variable is formed for the torque requirements of the propulsion system. The voltage reference variable is limited by upper and lower torque limit values which must not be overshot or undershot in the event of changes to the voltage reference variable. The torque reference variable is limited by voltage limit values which must not be overshot or undershot in the event of torque changes.
摘要:
In an energy supply circuit for a motor vehicle on-board electrical system with two voltage supply branches at different voltage levels, the first voltage supply branch can be fed by way of an electric direct voltage converter by the second voltage supply branch and the second voltage supply branch can be fed by a generator. A multi-level controller W3 with three voltage levels is provided whose first in/output is connected with the second voltage supply branch, whose second in/output is connected with the first voltage supply branch and whose third in/output is connected with the energy accumulator B1 assigned to the first voltage supply branch.
摘要:
A composite article made from polyacetal and from at least one modified styrene-olefin elastomer, which comprises from 15 to 70% by weight, based on the weight of the modified styrene-olefin elastomer, of non-olefinic thermoplastic material, and also a process for producing the same, where a molding made from polyacetal is firstly molded, onto which is then molded a coating or at least one molding made from the modified styrene-olefin elastomer, and an adhesive bond is formed between the polyacetal and the modified styrene-olefin elastomer.
摘要:
A plate for laying as a road surface in the vicinity of a railway comprising resilient rubber material delimited by three or more edges, at least one of which is provided with teeth to lock the plate with an adjacent plate against relative movement at right angles to the bearing surface of the plate, the plate being deformable to allow installation of a plate into position alongside already installed plates. The plate may have side edges adapted to fit closely to the rails, with or without a groove for rail wheel flanges. The shapes of the plates are chosen to fit the area between the permanent road, the rails and the side edges of the level crossing.
摘要:
A double acting piston pump for cryogenic mediums is disclosed. The pump includes a vertically positioned cylinder having a base portion and a cover portion, and inlet valves are disposed in the cover portion and the base portion for admitting the cryogenic medium into the cylinder and for providing a pressure component of approximately zero against the direction of flow of the cryogenic medium. Outlet valves are disposed in the cover portion and the base portion for discharging the cryogenic medium from the cylinder. A piston is slideably mounted in the cylinder and a drive rod connected to the piston extends through either the cover portion or the base portion of the cylinder. A drive arrangement engages the drive rod for actuating the piston. A housing is also provided which has a portion defining the cylinder. The drive rod and the drive arrangement are mounted in the remaining portion of the housing, whereby the housing is common to the piston, the drive rod and the drive arrangement. The pump is suitable for both liquid and gaseous mediums and generates practically no frictional forces.
摘要:
An arrangement and method for protecting a multiple voltage supply system against voltage arc-over between the different voltage planes. For this, the voltage in the low-voltage plane of the supply system is clamped to the low-voltage value with a voltage limiter until a battery disconnect switch in the high-voltage plane of the supply system is opened and the generator output voltage in the high-voltage plane is adjusted back to the voltage value of the low-voltage plane. As a result, the high-voltage plane of the supply system is disconnected from the high-voltage sources. Consequently, the voltage in the low-voltage plane is prevented from increasing even in case of a short-circuit between both voltage planes of the supply system and the consumers in the low-voltage plane can continue to be operated safely.
摘要:
The present invention relates to multilayered films consisting of a thermoplastic film having a long term temperature resistance above 130.degree. C. and a tough elastic film of a mixture of a polyurethane, an acrylate rubber polymer and optionally a thermoplast resin selected from vinyl polymers.The invention also relates to the use of the multilayered films for the production of crash pad films.
摘要:
For a shut-off device comprising a tubular housing to be built into a pipe and a rotary valve for which a driving shaft penetrating the housing and a seat in the housing are provided, a ring wheel (4) with movable bearings (9) being disposed on the driving shaft (10) and the valve flap (3) being guided in the ring wheel (4) and connected with the driving shaft by a gearing (22, 23) which locks when the valve flap (3) swivels in and serves to press the valve flap (3) onto its seat (32), the invention provides for the following: when the driving shaft (10) is rotated back, the gearing (22, 23) lifts the valve flap (3) axially off the seat (32) until the valve flap (3) is supported on the ring wheel (4), and the gearing (22, 23) constitutes the connection between the valve flap (3) and the driving shaft, the valve flap (3) being supported on the ring wheel (4).
摘要:
A support body for the conductors of a low-temperature cable including a plurality of carrier elements in tandem which, along with connecting parts arranged therebetween, form a common molding, in which the outer surfaces of the carrier elements contain notches or slots for conducting the cooling medium in the axial direction to permit heat generated at the conductor to be easily removed to permit a construction which requires no special measures for supporting the carrier elements when the support bodies are wrapped in cabling machines.
摘要:
The invention concerns an arrangement for cooling an electric cable which comprises deep-cooled inner and outer conductors at high voltage and zero potential, respectively, and is provided with cable terminations, in which said inner and outer conductors are connected with respective inner and outer ordinary conductors. The invention consists of the provision that separate cooling loops with a common coolant supply unit are associated with the inner and outer ordinary conductors, and that likewise separate cooling loops with a common return and a further common coolant supply unit are associated with the inner and outer conductors. In this arrangement, the heat losses produced can be removed to the coolant supply units with relatively high efficiency.