Industrial Switched Reluctance Motors and Drives 2017 by Nidec Motor Corporation

More catalogs by Nidec Motor Corporation | Industrial Switched Reluctance Motors and Drives 2017 | 4 pages | 2017-05-13

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Page 2 of Industrial Switched Reluctance Motors and Drives 2017

how does switched reluctance “sr” work it’s simple magnetic attraction current flowing in the coil windings establishes a magnetic field between the stator and rotor poles magnetic attraction pulls the rotor poles toward the stator poles hence torque and rotation are produced by optimizing the timing and current level with both torque and speed the sr machine is highly efficient over a wide range of conditions as a motor or generator sr motor basics energizing a stator coil as the rotor and stator poles are approaching motoring torque energizing a stator coil as the rotor and stator poles are separating braking torque rotation is produced by sequentially energizing sets of stator coils direction is controlled by reversing the energizing sequence coil current flow is always in the same direction unipolar what is an sr drive system sr drive systems contain both a motor and a power converter the power converter contains bus capacitors solid state switches and signal processing electronics matched to the motor similar in many ways to a traditional inverter it takes power from the ac line rectifies it to a dc bus and then steers it to the motor windings to control torque and speed finding a solution the combination of a drive from sr drives® and a u.s motors® brand switched reluctance motor creates a system that can be used across a wide range of applications to take advantage of this technology user interface control concentrated windings with short end turns electrical supply 380-480vac 3ph 50-60hz bi-directional mechanical torque diode rectifier dc link igbt switches laminated steel rotor