A sober, robust and economical starting resistor

Delivered in an IP23 case.
Starting resistors are calculated for each application, then manufactured in our stainless steel workshops.
The result: starting resistors that provide identical starts, faithfully accompanying even the harshest processes - vibration, humidity, corrosive atmosphere, heat, cold, dust, etc.
Cases are sized for a given number of starts and stall time, and protected in the event of overruns.

Benefits

• Initial motor supply at reduced voltage
• Wide range of options depending on priority (max. torque, max. current, etc.)
• Smooth load build-up
• Economical
• Adaptable to the type of resistive torque
• maintenance-free

Principle

Slip-ring motors are excellent motors, offering high power ratings and a good compromise between a cage motor, which is very economical but difficult to control, and expensive servomotors. They offer precise controllability and good current/torque linearity around the rated current.
A rotor start is a multi-stage process, generally between 3 and 5 stages. In fact, slip-ring motors start under very unfavorable conditions: very low initial torque, inrush current 7 times higher than nominal.
An economical solution, offering numerous possibilities and adaptable to processes, consists in inserting resistors in the rotor circuit. The resistors are operated during start-up to ensure optimum motor take-off. Each maneuver corresponds to a time. Depending on the currents involved and the number of beats, resistors can be added in parallel or short-circuited in series, the aim always being to reduce resistance during start-up.

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