DEVICE FOR DETECTING FAULTS IN ROTARY ELECTRIC CIRCUITS OF BRUSHLESS EXCITERS OF SYNCHRONOUS MACHINES

• US 3,733,518 A
• Filed: 03/03/1972
• Issued: 05/15/1973
• Est. Priority Date: 03/03/1972
• Status: Expired due to Term

• Current Assignee: Valentin Stepanovich Polulyakh, Vasily Semenovich Kildishev, Viktor Grigorievich Yakovenko, Viktor Nilolaevich Khodkevich
• Original Assignee: Valentin Stepanovich Polulyakh, Vasily Semenovich Kildishev, Viktor Grigorievich Yakovenko, Viktor Nilolaevich Khodkevich
• Inventors: Polulyakh, Valentin Stepanovich, Khodkevich, Viktor Nilolaevich, Yakovenko, Viktor Grigorievich, Kildishev, Vasily Semenovich
• Primary Examiner(s): Trammell, James D.
• Application Number:
  US05/231,671
• Time in Patent Office: 438 Days
• Field of Search: 317/13R 324/34,158MG,51 322/99 321/5 318/180
• US Class Current: 361/20
• CPC Class Codes: G01R 31/343 in operation
• CPC Class Codes: H02H 3/046 Signalling the blowing of a fuse detecting non functioning of a lamp H05B47/20
• CPC Class Codes: H02H 7/0805 for synchronous motors

Abstract

The proposed device includes an induction pickup for checking the circuits under control mounted close to these rotary circuits conducting an electric current. The output of the induction pickup of the controllable circuits is connected to one of the inputs of a signal distributing unit made in the form of a trigger counter whose outputs are connected to a diode matrix. Connected to the other input of the signal distributing unit is the output of an interrogation pulse shaping unit. The output of the signal distributing unit is connected to the inputs of a unit for controlling and indicating the condition of the circuits under control employed for light signalling about a fault and for sending signals to the system for automatic control and protection of the exciter and the synchronous machine excited thereby.

Claims

1. A device for detecting faults in rotary electric circuits of brushless exciters of synchronous machines comprising in combination:

a signal distributing unit made in the form of a trigger counter whose outputs are connected to a diode matrix;

an induction pickup for checking the condition of the circuits under control mounted on the stationary part of the brushless exciter near the rotary circuits under control;

an amplifier-shaper of said induction pickup whose output is connected to the bar for power supply of said diode matrix while the terminals of the winding of the induction pickup checking the condition of the circuits under control are connected to the input of said amplifier-shaper;

an interrogation pulse shaping unit whose output is connected to the complementing input of said trigger counter of the signal distributing unit;

a starting interrogation pulse shaping unit whose output is connected to the bar for resetting said trigger counter of the signal distributing unit;

a control and indication unit whose inputs are connected to the output bars of said diode matrix of the signal distributing unit;

said control and indication unit consists of amplifiers the number of which is equal to the number of the circuits under control, each amplifier being loaded with an actuating element sending a signal about faults in the rotary electric circuits to the system for automatic control of the brushless exciter of the synchronous machine.

2. A device for detecting faults in rotary electric circuits of brushless exciters of synchronous machines as claimed in claim 1, in which the interrogation pulse shaping unit consists of a steel toothed rotor mounted on the shaft of the brushless exciter having a quantity of teeth equal to m-1 circuits under control;

mounted near said unit is a permanent magnet with coils on its poles, the terminals of said coils being connected to the input of an amplifier-shaper.

3. A device for detecting faults in rotary electric circuits of brushless exciters of synchronous machines as claimed in claim 1, in which the starting interrogation pulse shaping unit consists of a steel rotor with a single tooth mounted on the shaft of the brushless exciter;

a permanent magnet with coils on its poles is mounted near said unit, the terminals of said coils being connected to the input of the amplifier-shaper.