Device for simulating an instantaneous temperature-rise of a sem

Details Device for simulating an instantaneous temperature-rise of a sem Device for simulating an instantaneous temperature-rise of a sem

1981-06-10

1984-01-10

Nusbaum, Mark E.

Boots, shoes, and leggings

364808, G06G 762

Patent

active

044256248

ABSTRACT:
In order to simulate an instantaneous temperature-rise of a thyristor through which flows a current (I), this device takes the mean value (VM) of that current and squares the effective value (EC) thereof. An image of the dissipated power obtained at the output of an adder (S) is applied to devices (K.tau.ra, K.tau.br, K.tau.jb) for simulating radiator-environment, housing-radiator and junction-housing thermal time-constants, respectively. An adder (S.sub.1) provides the image i (.DELTA..theta.) of the temperature-rise.

REFERENCES:
patent: 3018051 (1962-01-01), Hemstreet
patent: 3831014 (1974-08-01), Haid
patent: 3961173 (1976-06-01), Perry et al.
patent: 4000410 (1976-12-01), Hentschel et al.
`Transistor Heat Sink Calculations` by Myron Greenbaum, Electronics, vol. 33, No. 32, Aug. 1960, pp. 36, 66, 68.

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