AIP permanent magnet synchronous motor rotor tester test items mainly include Back electromotive force(BEMF), Back electromotive force(BEMF).

AIP permanent magnet synchronous motor rotor tester is suitable for electrical performance testing of various types of motor rotors.


Permanent magnet synchronous motor rotor tester

This series of tester is suitable for testing the electric performance of permanent magnet rotor, such as the magnet rotor of BLDC motor on EV, Servo, fans, air conditioners, washing machines, vacuum cleaners, power tools and other products. After the test is completed, it gives qualified and unqualified instructions and sound and light alarm. 

Key Features

Integrated design: Integrated innovation design solutions simplify the operation workstation.

Fast clamping: simple and efficient clamping solution, convenient for production line personnel to operate and meet the production line pace.

Software features: user permission setting function; large storage able to save over 1000 test programs.

MES: support connecting with production management system.

Easy-to-maintain: support intelligent self-inspection, remote failure diagnosis and online software upgrading. Insertable card design makes it easy to disassemble and replace.

Easy-to-use: Professional test software, User-friendly interface, built-in help documents, high-performance touch screen and numeric keyboard as standard.

Multiple interfaces:  the instrument comes with USB, LAN support TCP/IP network protocol, PLC simulation technology. Instrument control and expansion are quite easy.


Test items: BEMF (back electromotive force), phase sequence.

The back-electromotive force test can effectively detect the rotor quality and consistency.


Back electromotive force(BEMF)

Voltage measurement range/precision

20.0~200.0V  ±(0.5% x display value + 5 digits )Customized measuring range

RPM setting range/precision


200~3000rpm ±1rpm  recommend Back EMF test speed 1000 rpm

Phase difference/precision

0.0~360.0°   ±1°

BEMF waveform

Waveform display

Phase difference

Phase difference judgment

Back EMF phase difference

  • How do you test a PMSM motor?

    1. BEMF (back electromotive force) 2. phase sequence.

  • What is a synchronous motor with a permanent magnet rotor?

    A permanent-magnet synchronous motor (PMSM) uses permanent magnets embedded in the rotor to create a constant magnetic field. The stator carries windings connected to an AC electricity supply to produce a rotating magnetic field (as in an asynchronous motor).

  • How do you control a permanent magnet synchronous motor?

    Vector control in a synchronous reference frame is the best way to control the permanent magnet synchronous machine (PMSM). The field-oriented control is used to control the spatial vectors of magnetic flux, stator current, and voltage.

  • What is the difference between PMSM and BLDC?

    A PMSM motor produces higher torque as compared to BLDC motor. The efficiency of a BLDC motor is less, around 85% to 90%. At same switching frequency, a BLDC motor has less switching losses. The switching losses in a PMSM motor are high.

  • How to measure PMSM motor parameters?

    The parameters are determined using measured applied voltages and responding currents. A single-phase DC voltage power supply can be used to determine the synchronous inductances of three-phase PMSM with sufficient accuracy.