DC motors Sample Clauses

DC motors. Fuel cells and batteries provide their energy as direct current. This means that the type of mains does not have to be changed to supply the motor. Every form of energy conversion (e.g. from AC to DC) is subject to losses. Avoiding additional conversions increases the overall efficiency of the drive. In addi- tion, DC motors offer a very high torque in the starting phase and can cover a wide speed range. The choice of machine, in terms of torque and speed, can be matched to the propeller shaft either as a direct drive or for use with a gearbox. In both cases, there is no need to provide a reversing gearbox, as the direction of rotation of the machines can be changed electrically and without delay. DC machines essentially consist of a rotor and a stator, both of which must be supplied with power. As the rotor rotates, the transmission can only be realised with slip rings. These are subject to minimal wear during operation. As a result, DC motors are not maintenance-free and incur some costs over their service life. However, these machines are made of ordinary metals such as copper and steel. It is therefore possible to completely recycle such a motor at the end of its service life. In DC motors, there are various ways of interconnecting the excitation windings of the stator and the armature windings of the rotor. This allows different machine characteristics to be achieved. Only sep- arately excited DC machines are suitable for the main drive on board inland waterway vessels. The excitation windings and armature windings are fed by two different control circuits. Both are based on pulse width modulation of the mains voltage. This separation means that the machine can be optimised Author | Xxxxxxxxxx Xxxxxx-Xxxxxx Xxxxx agreement no. | 101096809 Funded by the Horizon Europe Programme of the European Union under grant agreement No 101096809 Funded by the Horizon Europe guarantee of the United Kingdom, under project No 10068310 Funded by the Swiss State Secretariat for Education, Research and Innovation Deliverable Number | D1.1 Deliverable title | Relevant identified technical solutions for the applied load. As a result, a high degree of efficiency can be achieved over the entire operating range of the machine.
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