ABSTRACT
In this thesis, a current source inverter fed squirrel cage induction motor drive at
constant air gap flux is presented. The drive scheme is conceived to take advantage
of the short circuit withstand capability of the current source inverter and the
ruggedness (even under harsh conditions) of the squirrel cage induction motor. The
variable inverter input dc link current is derivable from either a controlled ac to dc
converter or a controlled dc to dc converter. The constant motor air gap flux
control drive scheme has inner dc link current control loop and an outer motor
speed control loop that maintains the motor slip frequency constant for a given
motor load torque. The closed loop control parameters are selected such that
negligible torque pulsation and relatively fast motor speed response are obtained
without the need for an inverter output capacitor filter. A 400V, 10hp, 1440rpm,
50Hz squirrel cage induction motor is used to simulate the motor drive scheme in
Matlab-Simulink environment. For step changes in demand (reference) speed at no
load torque and at load torque equals to or less than the motor rated torque, the
drive response has relatively fast settling time and acceptably low
overshoot/undershoot over the motor speeds not exceeding the rated value.
UKWEJEH, J (2021). A Current Source Inverter-Fed Constant Air Gap Flux Controlled Squirrel Cage Induction Motor Drive.. Afribary. Retrieved from https://afribary.com/works/a-current-source-inverter-fed-constant-air-gap-flux-controlled-squirrel-cage-induction-motor-drive
UKWEJEH, JAMES "A Current Source Inverter-Fed Constant Air Gap Flux Controlled Squirrel Cage Induction Motor Drive." Afribary. Afribary, 15 May. 2021, https://afribary.com/works/a-current-source-inverter-fed-constant-air-gap-flux-controlled-squirrel-cage-induction-motor-drive. Accessed 23 Nov. 2024.
UKWEJEH, JAMES . "A Current Source Inverter-Fed Constant Air Gap Flux Controlled Squirrel Cage Induction Motor Drive.". Afribary, Afribary, 15 May. 2021. Web. 23 Nov. 2024. < https://afribary.com/works/a-current-source-inverter-fed-constant-air-gap-flux-controlled-squirrel-cage-induction-motor-drive >.
UKWEJEH, JAMES . "A Current Source Inverter-Fed Constant Air Gap Flux Controlled Squirrel Cage Induction Motor Drive." Afribary (2021). Accessed November 23, 2024. https://afribary.com/works/a-current-source-inverter-fed-constant-air-gap-flux-controlled-squirrel-cage-induction-motor-drive