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JPEEE1456 Use of Synchronous Modulation to Recover Energy Gained From Matching Long Cable in Inverter-Fed Motor Drives
1. Use of Synchronous Modulation to Recover Energy Gained
From Matching Long Cable in Inverter-Fed Motor Drives
Abstract:
As inverter-fed motor drives generate fast- voltage pulses, the
transmission-line effects on long motor cable and motor stator windings lead to
overvoltage on the cable and motor terminals, as well as inside motor stator
windings, and also an increase in the common-mode current. Such phenomenon
would cause premature failure of the motor and cable insulation. A general
protective measure is the use of a passive filter, such as RC and RLC filter, to
reduce the voltage surges by matching the cable impedance and/or altering the rise
time of the voltage pulses. However, passive filter are bulky and lossy. This paper
presents an active motor terminal filter with an energy recovery function that can
achieve the same functions as the passive filter, but consumes much less power.
The proposed filter recovers energy gained from suppressing motor terminal
voltage surges and regenerating the recovered energy back to the whole system. An
experimental filter has been built and evaluated on a 1-HP three-phase motor drive
system. A comparative study into the performance among commonly used RC
filter and RLC filter and the proposed filter will be given.
2. Block diagram:
DC SUPPLY
TOOLS AND SOFTWARE USED:
MP LAB
ORCAD/PSPICE
MATLAB/SIMULINK
OUTPUT:
HARDWARE
SIMULATION
ELECTRIC
MOTOR
ENERY RECOVERY
MODULE
FILTER CIRCUIT
DRIVE CIRCUIT
MICROCONTROLLER