Aign. Position Bing send selection Tet Forward Backward 1 To control the speed,

Question

Aign. Position Bing send selection Tet Forward Backward 1 To control the speed, torque accelerator, deceleration and direction of rotation of a machine 2. The preferred method of speed oortrol for squirrel cage indication motorsisto alter the frequency of the supply voltage. 3 AComverter A full-wave rectifier that converts the applied AC to oc DC Bus: Also referred to asaDclank connects the rectifier output to the nput of the inverter. The Dc bus functions as a filter to smooth the uneven, nppled output to ensure that the rectified output resembles as closely as possible pure DCI C Inverter. The inverter takes the filtered DC from the Dc bus and converts it into a pulsating Dc waveform by controlling the output of the inverter the pulsating c waveform can smulate an AC waveform at drerent fequencies. D. Control logic-The control systems generates the necessary puhes ered to control the firing of the Power semiconductor devices such as SCRs and transistors. 4 The driver inverts the Dc waveform into three different pulse modulated waveforms signatures that The principal energy storage element is the bus capacitors Inverters use insulated Gate Bipolar Transistors IIGBTslto switch the Dc bus on and oft s output voltage is varied by chargng the width and polarity of the switched pulses 5.output frequency is adjusted by changing the switching cycle time. 10. The fundamental frequency is the variable frequency a motor uses to vary speed the carrier frequency also known as the switch frequency) is the frequency at which the pulses your pulse pwM ii An inverter duty motor can withstand the higher voltage spaes produced by all vios and can run at very slow speeds without overheating. 12. open loop there s no feedback of actual motor speed, closed loop there feedback used for more

Explanation / Answer

Dear student ,

The answers to the above questions are correct and the answer for the 5th question is given below

Average dc bus voltage for 230V AC line voltage= 1.41×230=324.3 Vdc or 325Vdc(approx.)

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