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Questions tagged [vfd]

Variable frequency drive, a three-phase AC output motor controller. Questions about vacuum fluorescent displays should not receive this tag.

3
votes
2answers
78 views

How can I tell if a cable is rated for use as motor leads with a variable frequency drive?

I understand that the switching edges generated by a VFD can cause corona breakdown of the insulation on the motor leads. Due to this, it is recommended that some cables be used for VFD motor leads, ...
0
votes
2answers
135 views

VSD (Inverter) current measurement on 3 motor phases

I'm working on a project to build a rig for testing various sized Variable Frequency Drives (VSD's / inverters), the kind that you'd use to run a squirrel cage induction motor. The range would be from ...
1
vote
1answer
22 views

Slip Control vs Constant V/F Control for 3-Phase ACIM

I am trying to understand how is Slip Control different from Constant V/F control. If I need to control the speed of 3-phase ACIM then its slip would obviously change with its rotational speed then ...
1
vote
1answer
974 views

How to determine a Permanent Magnet Synchronous Motor (PMSM) Nameplate?

I have already built a three-phase Permanent Magnet Synchronous Motor(PMSM) and wanted to use a VFD in sensorless vector control mode to run it. Now I want to figure out the characteristics of my ...
0
votes
1answer
36 views

How VFD affects an isolated IOT system

To avoid noise from the external system I tried to isolate the internal completely. So I added DC-DC isolated converter with signal isolation. I have attached the picture. Still when reading data and ...
0
votes
1answer
23 views

Speed control using direct torque control of induction motor

Is there any steady state error present in speed output at any load in direct torque control of induction motor?
0
votes
1answer
72 views

why fs25r12w1t4 infineon module is burnt out when high current is paassed through it?

I am implementing a VFD for Induction motor drive. I have used fs25r12w1t4 Infineon IGBT module ( 1200v 25A) with gate driver 6ed003l06-f2. It always burnt out when I passed 2A current. What may the ...
0
votes
1answer
268 views

Testing an induction motor with a VFD, difference in voltage and mechanical power vs electric power

I have question about a electro motor powered by a frequency regulator. It is the first time I did some test on a frequency regulator on school. This are the parameters of the motor The motor is ...
0
votes
0answers
86 views

Design temperature for an electrical control panel?

I am putting together an electrical control panel composed of small VFDs (like Siemens micromaster 440), PLC AB 1400 B etc, contactors, relays etc. What temperature and humidity should I design the ...
0
votes
0answers
29 views

PWM for ACIM scalar control

I have inherited a control software for ACIM scalar control and I need to do some changes in this software. Before I can do any change I need to understand current implementation. So I have started to ...
0
votes
0answers
45 views

There exists 110v/60Hz motors as well 220/50Hz ac motors rating, what determines the voltage of an electric motor?

I have seen the Toms question and answers for what determines the voltage of an electric motor? None of the answers not fulfilling. I was not able to comment to get clarify my doubt, so I’m posting ...
0
votes
0answers
73 views

Why Fault pin of IR2136 gate driver is getting low at high voltage?

I am implementing a variable frequency drive for a three-phase induction motor. I used IGBT module fs25r12w1t4 with gate driver ( three phase, six Channels IR2136). When I increase the voltage, the ...
0
votes
0answers
44 views

Question about earth grounds for remote control of VFD via a DAQ system

A single-ended earth grounded PCI data acquisition board's analog inputs and outputs are controlled by a PC. The daq board has also analog outputs. One of the analog output is controlling the motor ...
0
votes
0answers
181 views

Filtering variable-frequency-drive noise by an RFI filter

We are having random noise issues on PC controlled data acquisition where one is related to VFD drive which is controlling the AC motor. The thing is that, sometimes we observe continous large noise ...