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The AC drive works by converting the traction alternator output to DC (direct current) and reconverting it to a variable frequency AC which powers AC traction motors. Because AC motors operate at approximately the frequency of the current, the drives must adjust the frequency so that the motors can have a speed range of zero to maximum rpm. Motor characteristics are frequently given as two points on this graph: The stall torque,, represents the point on the graph at which the torque is a maximum, but the shaft is not rotating. The no load speed,, is the maximum output speed of the motor (when no torque is applied to the output shaft).
ELECTRICAL DRIVES AND TRACTION (3-1-0) (For Electrical and Electrical & Electronics Engineering Students) MODULE-I (10 HOURS) Requirements, AC and DC drives, modern trends in drives technology, Characteristics of DC, Induction and Synchronous motor drives, (starting, running, speed control, braking), size and AC-AC Traction System For HHP Locomotives . ... motor Two traction invertors for each bogie Two traction invertors for each bogie IGBT Devices ABB make, V =6.5 K AC traction motors have replaced DC motors in many traction applications. The motors used are induction or asynchronous motors designed to have characteristics suitable for traction. The speed and torque of the motor are controlled by varying the frequency, voltage and current applied to the stator coils.
Mar 23, 2019 · A series wound DC motor like in the case of shunt wound DC motor or compound wound DC motor falls under the category of self-excited DC motors, and it gets its name from the fact that the field winding in this case is connected internally in series to the armature…
In the above diagram, you can see two magnets in the motor: The armature (or rotor) is an electromagnet, while the field magnet is a permanent magnet (the field magnet could be an electromagnet as well, but in most small motors it isn't in order to save power).
The article How Electric Motors Work explains how brushed motors work. In a typical DC motor, there are permanent magnets on the outside and a spinning armature on the inside. The permanent magnets are stationary, so they are called the stator. The armature rotates, so it is called the rotor. The armature contains an electromagnet.
Sometimes called "AC motors" instead of "DC series-wound motors" or "universal motors," these are not the motors to which one refers when referring to AC traction motors. Note: In the motor wiring diagrams , the DC motors do not have separately excited windings. A diesel locomotive is a type of railway locomotive in which the prime mover is a diesel engine. Several types of diesel locomotive have been developed, differing mainly in the means by which mechanical power is conveyed to the driving wheels. Early internal combustion locomotives and railcars used kerosene and gasoline as their fuel. C1 – Black wire to Traction Motor A2, Black wire to Resistor 18 C2 – White wire to Solenoid Terminal F3, White wire to Solenoid Terminal A3 C3 – Black Wire to Microswitch NC Terminal, Black wire to Time Delay 22 C4 – Black wire to Resistor 18, Black wire to Negative Terminal Front Batteries, Black wire to Right Diode 21 Dual Action Solenoid Traction motors are the key components of complex propulsion systems that drive freight locomotives and passenger transit vehicles. The operational performance of traction motors directly affects the efficiency and dependability of services provided by Rail Transportation and Mass Transit industries.
One AC Controller managed by TAU firmware provides advanced control of one Traction motor and one Pump motor. DUAL TRACTION+PUMP. One AC Controller managed by TAU firmware provides advanced control of two Traction motors . One AC Controller managed by TAU firmware provides advanced control of one Pump motor. CAN connection among the Controllers. Jan 14, 2019 · Traction Motor Control: Operation of a dc separately excited motor for traction applications can be divided into three regions, First two are identical. i.e. constant torque and power regions. In constant torque region, from zero to base speed, the field current is maintained constant at the rated value and the armature voltage is controlled. You can use just about any motor to generate electric current, if it is wired correctly and you follow specific rules for its use. Modern AC induction motors are quite simple to wire as alternating current generators, and most will begin generating electricity the first time you use them. These motors don't use magnets and the generator relies ... AC-AC Traction System For HHP Locomotives . ... motor Two traction invertors for each bogie Two traction invertors for each bogie IGBT Devices ABB make, V =6.5 K