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Milling Energy intensive and high maintenance

system, couple the motor to the mill. Another possibility is to use a motor that can develop sufficient torque such as the wound rotor induction motor with rotor resistor starter. There are some drawbacks to be considered while using such a fix speed direct on line alternative independently if a high – or low speed solution is selected.

Whatever your requirements, you 'll find the perfect service-oriented solution to match your specific needs with our help.We are here for your questions anytime 24/7, welcome your consultation.

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  • Electrolytic starter LRS for high power slipring motors

    Electrolytic starter LRS for high power slipring motors

    EPM electrolytic starter can be used to start slipring motors from 500 to 20,000 kW, resistance variation supplying the power necessary to drive the motor ... Technology and principles of AOIP starters for slipring motors. AOIP starters for slipring motors, also named electrolytic starters or Liquid Resistance Starters (LRS), use mobile ...

  • Liquid starter : Liquid rheostat Electrolytic Starter

    Liquid starter : Liquid rheostat Electrolytic Starter

    Electrolytic starters, liquid rheostat, specially designed by AKA AUTOMATION offers optimum starting performance. ... Easy to adapt to different motor. Cost effective. Low maintenance costs (minimizes shocks, and energy usage) Home > Liquid starters. AKEP for Cement Plant. Liquid Starter for Cement Plant from 250kW to 10 000kW. Find out more ...

  • Liquid rheostat  Wikipedia

    Liquid rheostat Wikipedia

    A liquid rheostat or water rheostat or salt water rheostat is a type of variable resistor. This may be used as a dummy load or as a starting resistor for large slip ring motors. In the simplest form it consists of a tank containing brine or other electrolyte solution, in which …

  • What is rotor resistance starter?  Quora

    What is rotor resistance starter? Quora

    Sep 10, 2018 · Starter means which limits starting current(major priority) and also it can be used to control the speed of a machine. Rotor resistance starter is used with a wound ...

  • Starting andcontrol of slipring 5

    Starting andcontrol of slipring 5

    Starting and control of slip-ring induction motors5/97 The use of wound motors is on the wane, for reasons of inherent advantages of a squirrel cage motor over a wound motor and the availability of static drives which can make a squirrel cage motor perform the same duties as a wound motor and even better. Nevertheless, the use of

  • Wound rotor motor  Wikipedia

    Wound rotor motor Wikipedia

    A wound-rotor motor is a type of induction motor where the rotor windings are connected through slip rings to external resistance. Adjusting the resistance allows control of the speed/torque characteristic of the motor. Wound-rotor motors can be started with low inrush current, by inserting high resistance into the rotor circuit; as the motor accelerates, the resistance can be decreased.

  • Wound Rotor Induction Motors and Starters

    Wound Rotor Induction Motors and Starters

    are used for squirrel cage motors. For the rotor, a multi-step resistor and switching means for that resistor are required. For a soft start application, the resistor is switched out of the circuit step by step as ... like a liquid rheostat. Wound Rotor Induction Motors and Starters Powell Industries, Inc. PO Box 12818 Houston, TX • 77217 ...

  • Wound Rotor Induction Motor with Liquid Rheostat Arcing

    Wound Rotor Induction Motor with Liquid Rheostat Arcing

    Sep 18, 2011 · Wound Rotor Induction Motor with Liquid Rheostat Arcing Slip Rings ... The arcing damages the ring badly which requires us to shutdown the mill to sand it smooth again. The motors had run well for the past several years, but in the last few months have encountered these frequent breakdowns. ... I suggest you check the liquid resistor solution ...

  • Wound Rotor Motor Resistor  Electric motors  generators

    Wound Rotor Motor Resistor Electric motors generators

    Mar 28, 2011 · We have a 250 HP wound rotor motor that came with a salvaged rod mill that is going to be put back in service at another nine site. The nameplate has been lost. ... Wound Rotor Motor Resistor. waross (Electrical) ... in many Wound Rotor motor starters, the resistance steps are controlled by a current relay which measures stator current ...

  • MOTOR TECHNOLOGY Saving energy  TMEIC

    MOTOR TECHNOLOGY Saving energy TMEIC

    Mill drive example An example of slip power recovery is the wound rotor motor shown below, one of two for powering a new 10,000 kW SAG mill in Australia as shown in Figure 3. This installation includes: • Two 5000kW six-pole WRIMs with 11,000v stators • A combining gear box driving the mill • One 10,000kW liquid resistance starter (rheostat)

  • Motor Control  Cressall

    Motor Control Cressall

    Applications for resistors in motor control Wound Rotor Motors with Slip Rings. This type of motor is still used for high power (600kW+) or medium voltage (3.3kV+) applications in arduous operating conditions – as pumps and cement plants – where the combination of exact control and very high reliability is hard to achieve with variable speed drives.

  • Rotor Resistance Starters  Home  OHMIC RESISTORS

    Rotor Resistance Starters Home OHMIC RESISTORS

    Rotor resistance starters are comprised of three sections :~ – Stator – Rotor Contactor and – Resistor section. For High Voltage wound motors, on the stator side, a High Voltage Circuit Breaker or Vacuum Contactor can be incorporated into the design. Low voltage motors use standard Contactors and motor …

  • Wound Rotor  TECOWestinghouse

    Wound Rotor TECOWestinghouse

    easily. Wound rotor motors also can develop high starting torque at standstill - while maintaining low inrush. Long motor life is ensured with the use of external resistor banks or liquid rheostats that dissipate heat build-up generated during motor start-up. What makes the wound rotor motor a unique induction machine is its rotor. Instead of a ...

  • Liquid starter : Liquid rheostat Electrolytic Starter

    Liquid starter : Liquid rheostat Electrolytic Starter

    Electrolytic starters, liquid rheostat, specially designed by AKA AUTOMATION offers optimum starting performance. ... Easy to adapt to different motor. Cost effective. Low maintenance costs (minimizes shocks, and energy usage) Home > Liquid starters. AKEP for Cement Plant. Liquid Starter for Cement Plant from 250kW to 10 000kW. Find out more ...

  • How does a liquid starter opperate?  Quora

    How does a liquid starter opperate? Quora

    Jun 17, 2016 · Wound-rotor motors use resistance in the rotor circuit to control torque and speed. That resistance can be large, high-wattage physical resistor grids switched with contactors, or it can be a liquid rheostat. The resistor grid allows for “stepped” motor control - …

  • Liquid rheostat  Wikipedia

    Liquid rheostat Wikipedia

    A liquid rheostat or water rheostat or salt water rheostat is a type of variable resistor. This may be used as a dummy load or as a starting resistor for large slip ring motors. In the simplest form it consists of a tank containing brine or other electrolyte solution, in which …

  • Wound Rotor Induction Motors and Starters

    Wound Rotor Induction Motors and Starters

    are used for squirrel cage motors. For the rotor, a multi-step resistor and switching means for that resistor are required. For a soft start application, the resistor is switched out of the circuit step by step as ... like a liquid rheostat. Wound Rotor Induction Motors and Starters Powell Industries, Inc. PO Box 12818 Houston, TX • 77217 ...

  • BALL MILL DRIVE MOTOR CHOICES

    BALL MILL DRIVE MOTOR CHOICES

    the wound rotor motor was preferred. In the late 1950s, when mills approached 2500 HP, the center drive mill arrangement with the enclosed geared drive using a high-speed synchronous motor became quite popular. In more recent times the wound rotor motor with the liquid rheostat has come into use in

  • WoundRotor Motors  High Torque and Adjustable Speed

    WoundRotor Motors High Torque and Adjustable Speed

    Wound-rotor motors deliver speed control of heavy and high-torque loads.Whats special about the wound-rotor motor? This type of 3-phase induction motor has high starting torque, which makes it ideal for applications where standard NEMA design motors fall short. The wound-rotor motor is particularly effective in applications where using a squirrel-cage motor may result in a

  • Liquid Resistor Starter  ElectroDrives SL

    Liquid Resistor Starter ElectroDrives SL

    Home / Liquid Resistor Starter. Liquid Resistor Starter. Liquid Resistor Starter. Following our partnership with one of the leading manufacturers of Liquid Resistors Starters (LRS), Electro Drives SL is proud to supply a full package solution of motor starting and speed control for wound rotor induction motors …

  • NHP Liquid Resistance Starters

    NHP Liquid Resistance Starters

    In applications where the driven machine presents a high starting load and/or there is a need to start with absolute minimal current draw, a wound rotor (or slip ring) motor can provide unparalleled starting performance. NHP offers a range of Australian made and industry proven fixed and moving electrode liquid resistance starters for use with low and medium voltage wound rotor motors from 200 ...