dip04051978 Posted August 11, 2003 Report Share Posted August 11, 2003 SIR, HOW I CAN SELECT STARTING RESISTOR VALUE / RATING / TYPE FOR CRANE TRAVEL & HOIST APPLICATION?? REGARDS, DIPAK Link to comment Share on other sites More sharing options...
marke Posted August 16, 2003 Report Share Posted August 16, 2003 hello Dipak Changing the value of the resistors in the rotor circuit of a slipring motor, causes the speed torque curve to be altered. As you increase the rotor resistance, the speed of the maximum torque reduces. If you know the load torque and speed required, you can calculate the speed torque curves for the motor with different resistors and use these curves to determine the the required resistance value. While operating at reduced speed, the slip losses are dissipated in the resistors. You must select resistors of sufficient power rating to withstand this power.Best regards, Mark Empson | administratorSkype Contact = markempson | phone +64 274 363 067LMPForum | Power Factor | L M Photonics Ltd | Empson family | Advanced Motor Control Ltd | Pressure Transducers | Smart Relay | GSM Control | Mark Empson Website | AuCom | Soft Starters Link to comment Share on other sites More sharing options...
Recommended Posts
Create an account or sign in to comment
You need to be a member in order to leave a comment
Create an account
Sign up for a new account in our community. It's easy!
Register a new accountSign in
Already have an account? Sign in here.
Sign In Now