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What Is The Braking Resistor?

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What Is The Braking Resistor?
What Is The Braking Resistor?

Video: What Is The Braking Resistor?

Video: What Is The Braking Resistor?
Video: How work AC Inverter Braking resistor 2023, May
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An electric motor that moves a milling machine, for example, receives the electricity it needs from the network (alternating current). There is usually a frequency converter between the mains and the motor, which rectifies the alternating current and converts it back into alternating current as required. The area in between is called the DC link (see circuit diagram).

If the milling machine is to stop or change direction, the frequency converter throttles its frequency. The engine continues to work and becomes a generator - kinetic is converted into electrical energy .

The current generated in this way is now returned to the frequency converter, which then reduces the current consumption from the network. However, since the current consumption from the network cannot be reduced to the same extent as the current drawn from the motor, the voltage in the DC link increases.

This is exactly when the braking resistor comes into play . It is used to chop the DC voltage, chopped up by an electrical switch ("chopper"), to remove the excess voltage from the DC link to ensure the safety of the entire system. This creates heat that has to be dissipated, which places high demands on the design and material of the resistor.

Fascinating numbers of the construction

A radio signal takes seconds from earth to the moon - and it travels at the speed of light, i.e. 299,792.458 km / s. The light from the sun takes a little over 8 minutes to reach Earth. Is the sun still there? You will know it in eight minutes
A radio signal takes seconds from earth to the moon - and it travels at the speed of light, i.e. 299,792.458 km / s. The light from the sun takes a little over 8 minutes to reach Earth. Is the sun still there? You will know it in eight minutes
Billions of active users have used a standardized communication protocol since 1992 and sent a total of 59 billion messages in 2012, which cost up to 99 cents at weddings, had 1/1000 of the data volume of a minute's conversation and were 160 characters long - the SMS
Billions of active users have used a standardized communication protocol since 1992 and sent a total of 59 billion messages in 2012, which cost up to 99 cents at weddings, had 1/1000 of the data volume of a minute's conversation and were 160 characters long - the SMS
Years ago, the Inter City Experimental was introduced. On November 26, 1985, he promptly set a world record of 317 km / h, which was exceeded in 1988 at 406.9 km / h. For 780 km from Hamburg to Munich, an ICE now takes 5.5 hours - an average of 142 km / h
Years ago, the Inter City Experimental was introduced. On November 26, 1985, he promptly set a world record of 317 km / h, which was exceeded in 1988 at 406.9 km / h. For 780 km from Hamburg to Munich, an ICE now takes 5.5 hours - an average of 142 km / h
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The German economy costs billions of euros the so-called undisclosed figure for data theft, industrial espionage and sabotage. 4.7 million cases of cyber crime take place annually. 0.3% of this was made known to the authorities

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