Motor Current Analysis

Introduction

With industrial growth, it has become necessary to monitor the condition of the machine/system. Electrical machines being the most sensitive part has great importance for the researcher to monitor the faults diagnosis. Three phase squirrel cage motor (Induction Motor) is normally used for industrial purposes. Various techniques are used to control the speed such as DTC (Direct Torque Control), Vector Control, Close Loop Feedback Control etc.

WHY WE USED MOTOR CURRENT SIGNATURE ANALYSIS (MCSA)?

Motor Current Signature Analysis (MCSA) is a system used for analyzing or trending dynamic, energized systems. Proper analysis of MCSA results assists the technician in identifying:
1. Incoming winding health
2. Stator winding health
3. Rotor Health
4. Air gap static and dynamic eccentricity
5. Coupling health, including direct, belted and geared systems
6. Load issues
7. System load and efficiency
8. Bearing health

TOOL USED FOR MOTOR CURRENT SIGNATURE ANALYSIS (MCSA)

Tool that is used for testing MCSA EMERSON CSI 2130/2140 (with Complete Set of CT, PT, Flux Coil & Volt Adaptor)

ISO STANDARD

ISO 20958:2013 sets out guidelines for the online techniques recommended for the purposes of condition monitoring and diagnostics of machines, based on electrical signature analysis. ISO 20958:2013 is applicable to three-phase induction motors