Dilihat 1148
- Basic principles of rotating electric machines
- Fundamental principles of speed control
- Efficiency, torque, inertia, horsepower/power factor
- Torque-speed curves
- Induction/synchronous/wound rotor types
- Basic construction and physical configuration, windings
- Principles of operation and performance
- Components
- Theory of operation
- Induction motor design
- Duty cycles
- Insulation and Cooling requirements
- Starting methods
- Selecting motors
- Types of faults, fault finding and testing of AC machines
- Testing instrumentation
- Standards
- Types of Losses
- Tests for measurement and computation of losses and efficiency
- Dynamometers
- Principles of load application by braking
- Torque measurement basics
- Types of practical dynamometers
- Frequent starts
- High inertia
- Inadequate cooling
- Congestion on fan cover
- Improper spacing at end of motor
- Incorrect belt alignment
- Solid belt guards
- Excessive loading causing bearing clearance problems
- Insulation failures
- Bearing current problems
- Insulation life and resistance
- Polarization index
- Hipot
- DC ramp test
- Ac hipot
- Capacitance test
- Dissipation factor
- Partial Discharge
- Surge test
- Mechanical testing
- Online testing
- Bearing failures
- Grease and greasing
- Belt Drive aspects
- Balance
- Storage issues
- Service factor loading
- Thermal overload
- Time constraints
- Early relays and new digital relays
- Starting and stalling conditions
- Over Current / Overload
- Under-voltage / Over-voltage
- Under frequency
- Pole slip / Out of step
- Loss of excitation
- Inadvertent energization
- Over fluxing
- Stall protection / acceleration time / Start up supervision / Time between starts
- Unbalanced supply voltages
- Negative sequence currents
- De-rating factors
- Earth faults – core balance, residual stabilising resistors
- Calculation of protective relay settings
- Power Circuit
- Control Circuit
- Full Online voltage starting
- Reduced voltage starting
- Delta-star
- Resistance
- Reactor
- Autotransformer
- Soft start
- Braking
- Speed Control
- Reversing
- Overall control system
- Power supply for the control system
- Dc Bus charging system
- VSD control loops (Open Loop/Closed loop)
- Vector control
- Current feedback in ac variable speed drives
- Speed feedback from motor
- General installation and environmental requirements
- Power supply connections and earthing
- Where to install contactors in power circuit
- Installation of ac converters into metal enclosures
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HUBUNGI KAMI
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Email : marketing1@cakrabiwa.co.id
