Electricity: measuring and testing – Impedance – admittance or other quantities representative of... – Lumped type parameters
Reexamination Certificate
2006-10-24
2006-10-24
Deb, Anjan (Department: 2858)
Electricity: measuring and testing
Impedance, admittance or other quantities representative of...
Lumped type parameters
C324S545000, C324S546000
Reexamination Certificate
active
07126368
ABSTRACT:
A system and method detects coil-to-coil faults in an electric motor having a plurality of coils. The method includes applying a square wave signal to a first coil of the motor, connecting a capacitor and a resistor between ground potential and a second coil of the motor, applying the coil output voltage to an amplifying and peak detecting circuit, applying an output of the amplifying and peak detecting circuit to the input of the control unit and, after a delay period, generating a motor fault signal if the coil output voltage is below a predetermined threshold. The square wave signal is amplified by a circuit which prevents transmission of voltage signals from the coils to the output of the control unit during normal operation of the motor.
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BJM Corporation, All-Test III™ Motor, Coil and Winding Tester, 2 pages, date unknown.
Boeshans Brian Frederick
Hopman Jeffrey Gerald
Paulson John David
Shaw Robert Boyd
Deb Anjan
Deere & Company
Kramskaya Marina
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