The dynamic braking of induction motors
Abstract
The dynamic braking of induction motors is investigated with particular emphasis on the use of zero-sequence connections. The braking performance using both ac and dc supplies is compared. A mathematical model is developed to predict both the transient and steady-state zero-sequence braking performance. To ensure accurate calculations, a model is constructed to allow for the variation of secondary parameters with frequency due to the skin effect. A method for determining the zero-sequence parameters using locked rotor variable frequency data is presented. To measure the transient acceleration torque of the machine, a rotational accelerometer is developed from a small single-phase induction motor. Good correlation between measured and calculated results is achieved during switching transients for both current and torque.
- Publication:
-
Abstract Only New South Wales Univ
- Pub Date:
- March 1985
- Bibcode:
- 1985nswu.rept.....H
- Keywords:
-
- Accelerometers;
- Braking;
- Induction Motors;
- Transient Response;
- Alternating Current;
- Direct Current;
- Mathematical Models;
- Torque;
- Electronics and Electrical Engineering