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- Shaft_voltage abstract "Shaft voltage occurs in electric motors and generators due to leakage, induction, or capacitive coupling with the windings of the motor. It can occur in motors powered by variable-frequency drives, as often used in heating, ventilation, air conditioning and refrigeration systems. DC machines may have leakage current from the armature windings that energizes the shaft. Currents due to shaft voltage causes deterioration of motor bearings, but can be prevented with a grounding brush on the shaft, grounding of the motor frame, insulation of the bearing supports, or shielding.Shaft voltage can be induced by non-symmetrical magnetic fields of the motor (or generator) itself. External sources of shaft voltage include other coupled machines, and electrostatic charging due to rubber belts rubbing on drive pulleys.Every rotor has some degree of capacitive coupling to the motor's electrical windings, but the effective inline capacitor acts as a high-pass filter, so the coupling is often weak at 50–60 Hz line frequency. But many Variable Frequency Drives (VFD) induce significant voltage onto the shaft of the driven motor, because of the kilohertz switching of the insulated gate bipolar transistors (IGBTs), which produce the pulse width modulation used to control the motor. The presence of high frequency ground currents can cause sparks, arcing and electrical shocks and can damage bearings.".
- Shaft_voltage wikiPageExternalLink 05_jacky.html.
- Shaft_voltage wikiPageExternalLink abb_technical_guide_no5_revc.pdf.
- Shaft_voltage wikiPageID "31857185".
- Shaft_voltage wikiPageRevisionID "573192815".
- Shaft_voltage hasPhotoCollection Shaft_voltage.
- Shaft_voltage subject Category:Electric_motors.
- Shaft_voltage subject Category:Electric_power.
- Shaft_voltage subject Category:Electrical_safety.
- Shaft_voltage subject Category:Electrical_wiring.
- Shaft_voltage subject Category:Power_cables.
- Shaft_voltage type Artifact100021939.
- Shaft_voltage type Cable102934168.
- Shaft_voltage type Conductor103088707.
- Shaft_voltage type Device103183080.
- Shaft_voltage type ElectricMotor103273061.
- Shaft_voltage type ElectricMotors.
- Shaft_voltage type Instrumentality103575240.
- Shaft_voltage type Machine103699975.
- Shaft_voltage type Motor103789946.
- Shaft_voltage type Object100002684.
- Shaft_voltage type PhysicalEntity100001930.
- Shaft_voltage type PowerCables.
- Shaft_voltage type PowerLine103995535.
- Shaft_voltage type Whole100003553.
- Shaft_voltage comment "Shaft voltage occurs in electric motors and generators due to leakage, induction, or capacitive coupling with the windings of the motor. It can occur in motors powered by variable-frequency drives, as often used in heating, ventilation, air conditioning and refrigeration systems. DC machines may have leakage current from the armature windings that energizes the shaft.".
- Shaft_voltage label "Shaft voltage".
- Shaft_voltage sameAs m.0gtx942.
- Shaft_voltage sameAs Q17080379.
- Shaft_voltage sameAs Q17080379.
- Shaft_voltage sameAs Shaft_voltage.
- Shaft_voltage wasDerivedFrom Shaft_voltage?oldid=573192815.
- Shaft_voltage isPrimaryTopicOf Shaft_voltage.