High-power diode thyristor knowledge serial-thermal characteristics

Power diode thyristors are widely used in AC/DC converters, UPS, AC static switches, SVC and electrolytic hydrogen, etc. However, most engineers do not understand such bipolar devices as well as IGBTs. For this reason, we organized 6 Article serial, including forward characteristics, dynamic characteristics, control characteristics, protection, loss and thermal characteristics.

High-power diode thyristor knowledge serial-thermal characteristics

Power diode thyristors are widely used in AC/DC converters, UPS, AC static switches, SVC and electrolytic hydrogen, etc. However, most engineers do not understand such bipolar devices as well as IGBTs. For this reason, we organized 6 Article serial, including forward characteristics, dynamic characteristics, control characteristics, protection, loss and thermal characteristics. The content is extracted from Infineon’s “Bipolar semiconductor Technology Information”.

4. Thermal properties

In order to maintain the heat balance, it is necessary to remove the power loss in the Semiconductor that is converted into heat. To this end, we provide radiators with clear cooling properties. Describe the thermal equivalent circuit through an analog electrical circuit, as shown in Figure 32.

High-power diode thyristor knowledge serial-thermal characteristics
Figure 32. Thermal equivalent circuit of diode and thyristor

Rth JC=Junction-case steady-state thermal resistance

Rth CH=case-heat sink steady-state thermal resistance

Rth HA = steady-state thermal resistance of the radiator

a

High-power diode thyristor knowledge serial-thermal characteristics

Power diode thyristors are widely used in AC/DC converters, UPS, AC static switches, SVC and electrolytic hydrogen, etc. However, most engineers do not understand such bipolar devices as well as IGBTs. For this reason, we organized 6 Article serial, including forward characteristics, dynamic characteristics, control characteristics, protection, loss and thermal characteristics. The content is extracted from Infineon’s “Bipolar Semiconductor Technology Information”.

4. Thermal properties

In order to maintain the heat balance, it is necessary to remove the power loss in the semiconductor that is converted into heat. To this end, we provide radiators with clear cooling properties. Describe the thermal equivalent circuit through an analog electrical circuit, as shown in Figure 32.

High-power diode thyristor knowledge serial-thermal characteristics
Figure 32. Thermal equivalent circuit of diode and thyristor

Rth JC=Junction-case steady-state thermal resistance

Rth CH=case-heat sink steady-state thermal resistance

Rth HA = steady-state thermal resistance of the radiator

a

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