RS56-280M-6/9 locomotive load braking resistor light rail braking…

Lubei Electric RS56-280M-6/9 locomotive load braking resistor light rail braking resistor high power

The resistance is mainly to control the current of the drive and the turbine -oriented braking resistance by setting a specific DC voltage range to keep the DC bus voltage within a certain safe range, so as to achieve the purpose of protecting the transformer speed adjustment device and motor deviceEssenceAccording to the principle of asynchronous motor, in some applications that need to be reduced rapidly, the larger the torque, the greater the torque, so that the braking torque will increase with the increase of the speed to reduce the systemThe speed time has also been greatly shortened, and the feedback speed of energy has also been greatly accelerated. The voltage on the DC bus will rise rapidly. Now we need to add mounting resistance unit components to the DC side of the inverter to quickly convert the energy generated to thermal energy and consume the energy and consume it.Drop, so that the voltage of the DC bus is within a safe range.

3. Application in power facilities:

   1. The ceramic tube -type startup wound resistor will form a fixed ring number on the ceramic tube. Select the appropriate resistance alloy wire and wrap it along the ceramic tube.The heat dissipation is excellent, the resistor temperature coefficient is small, and it is straightforward. It is suitable for large currents when using the load for a short period of load.

  4. Selection of resistors

   1. In the high -gain amplifier circuit, a resistor with a small noise electromotive force should be selected, such as the metal membrane resistor, carbon membrane resistor and wire wound resistor.

   2. Select different types of resistors for the operating frequency of the circuit.The distribution parameters of the wire wound resistor are large. Even if the wireless wound resistor is used without sensing, its distribution parameters are much larger than that of non -wire wound resistors. Therefore, the wire winding resistance is not suitable for working in high -frequency circuits.In the circuit below 50kHz, because the distribution parameters of the resistor have little effect on the circuit work, the wire winding resistor can be selected.

3. The resistor in the high -frequency circuit requires the smaller distribution parameters as possible.Therefore, in high -frequency circuits up to hundreds of trillium, carbon membrane resistors, metal membrane resistors and metal oxide film resistors should be selected.In ultra -high -frequency circuits, ultra -high -frequency carbon film resistors should be selected.