September 25, 2018 posted by

One of the few remaining GTO Thyristor manufactures in the world, serving the traction and industrial markets for over 30 years. Production of GTOs commenced in the mid s. A GTO is a thyristor that can be turned off by applying a current to the gate in the reverse direction to that. 13 Products DGBP DGBP18, Dynex, GTO Thyristor. Quote Required, Request Quote for Lead Time. , , Code P. IsROHSCompliant.

Author: Bragar Dojind
Country: Zambia
Language: English (Spanish)
Genre: History
Published (Last): 19 January 2006
Pages: 445
PDF File Size: 10.77 Mb
ePub File Size: 11.52 Mb
ISBN: 517-7-13347-602-7
Downloads: 88684
Price: Free* [*Free Regsitration Required]
Uploader: Meztigrel

JavaScript must be enabled to view this email address.


A gate turn-off thyristor GTO is a special gto thyristor of thyristorwhich is a high-power semiconductor device. Simplified cross section of a GTO thyristor. This then stops the injection gro the base region of TR1 and this prevents gto thyristor flow in this transistor.

It was invented at General Gto thyristor. The typical on-off switching frequency is in the range of – hertz for most applications.

GTO gto thyristor are available with or without reverse blocking capability. This form collects your name, company, email, telephone number and enquiry so that we can assist gto thyristor with your question.

The resulting voltage drop thyeistor the base starts to reverse bias the junction and thereby stopping the current flow in this transistor – TR2. Normal thyristors silicon-controlled rectifiers are not fully controllable switches a “fully controllable switch” can be turned on and off at will.

Show on map Hide map. Although they are gto thyristor nearly as well known as the more standard forms of thyristor, the gate turn off thyristor, is now widely used as it is able to overcome many of rhyristor disadvantages of the traditional thyristor. The key capability of the gate turn-off thyristor is its ability to be turned gto thyristor by the use of the gate electrode on the device. The device turn on is accomplished by a “positive current” pulse between the gate and gto thyristor terminals.

Thyristors are switched ON by a gate gto thyristorbut even after the gto thyristor signal is de-asserted removedthe thyristor remains in the ON-state until a turn-off condition occurs which can be the application of a reverse voltage to the terminals, or a decrease of the forward current below a certain threshold value known as the “holding current”.

These gate turn-off thyristors are useful in a number of areas, particularly within variable speed motor drives, high power, inverters and similar areas. These high current density areas become gto thyristor, and can cause device failure if the current is not extinguished quickly. Select the products you are interested in by ticking the related checkbox. There was a problem with your request. As a result the gate turn-off thyristor is used in virtually all DC to AC and DC to DC high voltage conversion units Gate turn-off thyristor The capability for the gate turn off thyristor to be turned-on by a gate signal, and also turned-off by a gate signal of negative polarity give it a unique capability within the thyristor family of devices.


This extracts current from the base region of TR2. This is to allow the entire bulk of the device to vto turn on before thyristtor current is reached. If this rating is exceeded, the area of the device nearest the gate contacts will overheat and melt from over current.

The minimum on and off time is handled in DC motor chopper circuits by using a variable switching frequency at the lowest and highest duty cycle. Rate this page General impression. gto thyristor

Gate Turn-Off Thyristor, GTO

thyrjstor GTO thyristors suffer from long switch gto thyristor times, whereby after the forward current falls, there is a long tail time where residual current continues to flow until all remaining charge from the device is taken away. Usually, the reverse blocking voltage rating and forward blocking voltage rating are gto thyristor same.

gto thyristor In gto thyristor non-conducting state the gate turn-off thyristor is said to be in its forward blocking mode. In terms of the physics of the turn off phase, it is found that during the turn off phase of the GTO, current is crowded into higher and thyristtor density current filaments in areas that are most remote from the gate region.

Gate turn-off thyristor

Gate turn-off gto thyristor structure Like the standard thyristor, thyrisror gate turn-off thyristor is a four layer device having three junctions. The main applications are in variable speed motor drives, high power inverter and traction. When a potential is applied across the gate turn-off thyristor between the anode and cathode, no current will flow thryistor neither device is turned on.

The gto thyristor turn off is achieved by applying a negative bias to the gate with respect to the cathode. For turn-off, the GTO requires a device that limits the rate of voltage rise, in essence a capacitor. It can be thought of as being one PNP and one NPN transistor being connected in a regenerative configuration whereby once turned on the system maintains itself in this state.


The GTO can be turned on by a gate signal, and can also be turned gto thyristor by a gate signal of negative polarity. This is observable in traction applications where the frequency will ramp up as the motor starts, then the frequency stays constant over most of the speed ranges, then the frequency drops back down to zero at full speed. Got turn-off thyristor structure Gate turn gto thyristor thyristor operation Many aspects of the Gto thyristor turnoff thyristor, GTO are very similar to that of the ordinary thyristor.

This pulls the collector of this transistor down towards the emitter voltage and in turn thyrixtor turns on the other transistor – TR1. As the gate-cathode behaves like PN gto thyristor, there is a relatively small voltage between the terminals. To turn the device on it is necessary gto thyristor inject current into gate circuit of the device. Thyristlr turn off, the forward voltage of the device must be limited until the current tails off.

A GTO is a thyristor that can be turned off by applying a current to yhyristor gate in the reverse hto to that required to turn it on. Gto thyristor error occurred and your inquiry could not be sent.

Views Read Edit Gto thyristor history. GTOs are optimized for low conduction losses. Again the layers are P N P N with the outside p layer providing the anode connection, and the outside n layer gto thyristor he cathode connection.

Gto thyristor the standard thyristor, the gate turn-off thyristor is a four layer device having three junctions. A distributed buffer gate turn-off thyristor DB-GTO is a thyristor with additional PN layers in the drift region to reshape the field profile and increase the voltage blocked in the off state.

Reverse blocking capability adds to the forward voltage drop because of the need to have gto thyristor long, low doped Gto thyristor region. Gate Turn Off Thyristors Dynex Semiconductor is committed to the continued thyrishor of GTOs to service the maintenance market that exists because of the long service life of traction equipment. We will get back to you as soon as possible. For this country please use ABB’s partner contact details.