Voltage Source Inverters Advantages And Disadvantages
Voltage Source Inverters Advantages
(i) It has simple logic and can be operated open loop (no feedback of amperes or volts 18 required for steady-state operation).
(ii) A single controller can be used with more than one motor.
(iii) Reliability 1s good, somewhat better than for PWM types.
(iv) Voltage stresses on motor insulation are relatively low.
(v) Can be designed for up to 500 Hz operation.
Voltage Source Inverters Disadvantages
(i) Speed range is limited because of motor cogging at 6 Hz and below.
(ii) D.C. link stability can be a problem at low speeds because of motor interaction with d.c. link filter elements.
(iii) Requires an additional set of power devices in the input stage if regeneration back to the 3.6. the line is desired.
(iv) To obtain extended ride through capability on incoming power loss, a d.c. chopper must be added to the d.c. link.
(v) Input power factor 1s poor below the base speed.