M2/ETS

EV stators life testing control unit for automatic system.
The “EV” industry is continuously developing new requirements in terms of design, production and testing of electric motors. The purpose of this system is to verify the duration or life of a series of stators under examination. The test consists in carrying out the normal tests of: ELECTRICAL RESISTANCE, DIELECTRIC STRENGTH, SURGE with possible detection of PARTIAL DISCHARGE, alternating with periods of power supply via a three-phase PWM generator; this process will contribute to inducing impulsive currents on the stator under test, thus stressing the insulating materials and thus verifying their validity and longevity. The test is performed in dedicated, temperature-controlled ovens to speed up the test cycle.

TESTING:

  • LIFE TESTING EV MOTOR STATORS
  • ELECTRIC RESISTANCE
  • SURGE TEST
  • DIELECTRIC STRENGTH AC AND DC
  • PARTIAL DISCHARGE

FEATURES

The Risatti M2/ETS System incorporates the traditional electrical test benches and a duration test on several stators in a single solution; it is a scalar solution where the number of parts being tested at the same time can vary from a few units to tens.

COMPOSITION OF THE SYSTEM:

CONTROL UNIT:

  • POWER SUPPLY UNITS whose number varies according to the foreseen testing stations.
    High-performance three-phase inverters; the standard provides for a PWM frequency up to 50 KHz with a rise time of 100 msec
  • AUTOMATIC DIGITAL OHMMETER with adjustable current up to 100 A.
  • DIELECTRIC STRENGTH TEST INSTRUMENT in AC and DC 3.000V with maximum current of 50mA.
  • 3,000 V maximum voltage SURGE TEST. (Standard technical characteristics as “H” series)
  • PARTIAL DISCHARGE DETECTOR PD. Characteristics as specific documentation.
  • POWER SUPPLY MANAGEMENT
  • PC PANEL, specifications: Intel Celeron 3765U 1.9GHz dual-core, RAM 8 Gbyte 128 Gb Sata 3 MLC (Double division, WINDOWS 10 IoT Entry Embedded, N° 2 USB 2.0 (+1 frontal), No. 3 LAN 10/100/1000, No. 2 USB 3.0, No. 3 RS-232 serials, No. 1 DVI-I, No. 1 WI-FI (OPTION), No. KEYBOARD (OPTION).

CONNECTION UNIT
Remote unit according to the foreseen workstations.

THERMOSTATIC OVEN
(possibly provided by the Customer)

Related tests

Partial Discharge analysis (PD)

Partial discharges (PD) are electrical discharges localized in the dielectric insulation, limited only to a part of the dielectric material.

Electrical resistance test

Testing the electrical resistance of a winding is essential and is performed to measure the resistance of a winding.

SURGE test

The SURGE test is the most reliable method to test the insulation of winding systems and can also be used to test partial discharges.

AC Dielectric Strength Test

The AC dielectric strength test is performed by setting an acceptability threshold of the maximum current.

DC Dielectric Strength Test

The DC dielectric strength test is carried out when there are very significant capacitive currents.

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