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mandala09
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Hi friends is there anything that can explain the basic concept of IGBT inverter for ac motor drives..?
Help me please...
Hery
Help me please...
Hery
I've only personally used them to on output of controllers for things like turning on heaters, etc.Mike_In_Plano said:Some brushless motors are magnetized such that they produce sine waves as the turn while others produce trapazoidal waves.
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In all of these schemes, you'll have three phases to the motor and six transistors. Currently, the best transistor for low voltage drives, such as 200 volts and less, has proven to be the MOSFET. For higher voltages, all the into 1200 volts, the IBGT is the best. Older drives used SCR's but that technology has been pushed aside for IGBTs, and now even higher voltage applications are beginning to use IGBTs by stacking them.
That amazing power for that size of package.Mike_In_Plano said:I've seen motors on the order of 100-200 hp that are about 8-10 inches on the side and about 2 feet long. These were made to work from AC mains, so the motor drive's voltage would typically be from a 380V DC power source (rectified)
Well that explains why they are so good for those applications. Lots of money to be saved here.Again, people mostly want these to run off of AC mains and are after the power efficiency or the variable speed. Efficiency wise, these were hard to beat. Some topped out over 85%, which was far better than most induction motors. That's why you find them in probably every air conditioner air handler made for the USA.
That's so cool. I'm thinking a sticky like, What have some of your neatest projects been?, might be a good thing.As for IGBT's, at a convention I saw switches that ran in the 100's of kv and over a thousand amps. They stacked them in oil with a control board for each switch. fiber optic lines conveyed switch commands, and a toroid on each control board received power from a heavily insulated cable that passed current through each in turn. I think these were designed for transmission line rectifiers and inverters.
An IGBT inverter is a type of electronic device used to convert direct current (DC) into alternating current (AC) for various applications. It stands for Insulated Gate Bipolar Transistor inverter, and it is a type of power semiconductor device that combines the high efficiency of a MOSFET with the high switching speed of a bipolar transistor.
An IGBT inverter works by using an insulated gate to control the flow of current between the collector and emitter of the transistor. When a positive voltage is applied to the gate, it turns the transistor on, allowing current to flow through it. When a negative voltage is applied, it turns the transistor off, stopping the flow of current. This on-off cycle is repeated at a high frequency to convert DC into AC.
Some of the advantages of using an IGBT inverter include high efficiency, fast switching speed, and the ability to handle high voltages and currents. It also has a low on-resistance, which results in less power loss and heat generation. Additionally, IGBT inverters are compact and reliable, making them suitable for a wide range of applications.
IGBT inverters are commonly used in motor drives, uninterruptible power supplies (UPS), solar power systems, and electric vehicles. They are also used in welding machines, industrial equipment, and household appliances such as air conditioners and refrigerators. Essentially, any application that requires the conversion of DC to AC can benefit from an IGBT inverter.
Compared to other types of inverters, such as thyristor inverters or power diode inverters, IGBT inverters have higher efficiency and faster switching speeds. They also have a higher current and voltage handling capacity. Additionally, IGBT inverters have lower harmonic distortion, which is important for sensitive electronic equipment. However, they may be more complex and expensive to manufacture.