October 2020
Intermediate to advanced
450 pages
15h 32m
English
Content preview from Electrotechnical Systems
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237Electric Machine and Electric Drive Simulation
This cascade is economical for speed control ranges ±30% of the synchronous.
The PWM rectier controls the IM speed and torque, and the PWM inverter con-
trols the power ow, keeping the capacitor C voltage constant. Power of the devices
inthe rotor circuit is proportional to the control speed limits and in the said range is
about30%. The transformer Tr serves for matching the rotor and grid voltages. It is
necessary to keep in mind that the actual parameters of the rotor circuit devices can
vastly differ from the model parameters because the rotor parameters are referred to
stator in the model. ...
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