| 摘要 |
An apparatus for testing short circuit in electrical components such as motor or generator stators having plural windings with extremely low direct current resistance but measurable high frequency alternating current impedance. Preferably, the invention is embodied in a tester unit which includes leads for attachment to individual current windings forming a part of the article to be tested, and a transistor oscillator operated by a battery and having a display device such as a milliammeter in the output circuit in series with a diode or the like. A feedback circuit parallel with the milliammeter and the exterior load includes a center tapped inductor and a variable resistor in series with each other and controlling base current.
|
