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Class Information
Number: 318/780
Name: Electricity: motive power systems > Induction motor systems > Primary circuit control > Starting control > Three phase motor with variable transformer to initially adjust voltage to motor windings
Description: Subject matter wherein the circuit includes transformer means to enable the application of a voltage value for starting which is different from the voltage applied during running of a three phase motor.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 6940249 |
Inverter device |
Sep. 6, 2005 |
| 6841967 |
Coil winding number variable type motor and coil winding number varying method for varying cooling and heating capacity of reciprocating compressor |
Jan. 11, 2005 |
| 6049284 |
Method and zero-speed monitor for monitoring a three-phase machine |
Apr. 11, 2000 |
| 5721478 |
Process and device for supplying a polyphase electric motor during startup |
Feb. 24, 1998 |
| 5598079 |
A.C. induction devices having tuned compound windings |
Jan. 28, 1997 |
| 5500582 |
Multiphase load control system with switch connected split sources of phase voltage |
Mar. 19, 1996 |
| 5130628 |
Transformer providing two multiple phase outputs out of phase with each other, and pumping system using the same |
Jul. 14, 1992 |
| 4935686 |
Ac motor drive with switched autotransformer coupling |
Jun. 19, 1990 |
| 4371823 |
Apparatus and method for starting textile winder synchronous motor drives |
Feb. 1, 1983 |
| 4330740 |
Energizing circuit for providing low voltage starting for submersible pump motor |
May. 18, 1982 |
| 4320328 |
Apparatus for full voltage start of vibratory excitors |
Mar. 16, 1982 |
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