AIP BLDC motor no-load tester test items mainly include AC hi-pot, insulation resistance, and no load.

AIP BLDC motor no-load tester is mainly used in DC fan motors, power tools, DC motors, vacuum cleaner motors, wiper motors, window motors electrical performance tests.


BLDC motor no load tester

This series of testers is suitable for testing the electric performance of permanent magnets DC motors, such as the DC fan motor, power tools DC motor, vacuum cleaner motor, wiper motor, window motor, and other products. After the test is completed, it gives qualified and unqualified instructions and sound and light alarms.  

Key Features

Integrated design: Integrated innovation design solutions simplify the operation of workstations.

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 the 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, and PLC simulation technology. Instrument control and expansion are quite easy.


Test items:

AC Hipot: Vm, GND, Vcc, Vsp, FG short circuit to casing

Insulation resistance: Vm, GND, Vcc, Vsp, FG short circuit to casing

No load test: no-load voltage, no-load current, no-load power, RPM, direction of rotation, FG, Vcc, Vsp


AC Hipot: apply AC high voltage between the Vm、GND、Vcc、Vsp、FG and the casing, and check the current value of the test loop

Output voltage setting range/precision

AC 200~3000V      ±(3%×setting value+5 words)   

Breakdown of current measuring range/precision

0.10~20.00mA      ±(3%×display value+5 words)

Breakdown of current presetting alarm range


Test time range/resolution

1~300s   1s/step

Arc detection

1~9 level(level 9 is the most sensitive)

Insulation resistance: apply DC high voltage between the Vm、GND、Vcc、Vsp、FG and the casing, and check the insulation resistance of the test loop.

Output voltage setting range and precision

DC 500V/1000V         ±(3%×setting value+3V)

Insulation resistance measuring range and precision

1~500MΩ   ≤100MΩ:±(5%×display value+3 words)  >100MΩ:±(8%×display value+8 words)

Insulation resistance setting range/precision


Test time range/resolution

1~300s  1s/step

No load: check the voltage, current, power, and RPM when the motor running without a load

Voltage measuring range/precision

Vm:DC 20.0~350.0V    ±(0.5%×display value+1 word)

Current measuring range/precision

Im:0.010~2.000A      ±(0.5%×display value+2 words)

Power measuring range


RPM measuring range

Read from FG signal(within 3000rpm)


CW, CCW, and still

Vsp power output range/precision

DC 1.00~18.00V      ±(0.5%×setting value+1 word)

Vcc power output range/precision

DC 1.00~18.00V      ±(0.5%×setting value+1 word)

Icc current range

1.0-100.0mA          ±(1%×display value+2 words)

FG voltage level

High: 3.0-18.0V DC  Low:3.0-18.0V DC  ±(1%×display value+1 words)

FG frequency


FG duty cycle


FG waveform display


Power sequence chart

Power on sequence: Vcc-Vm-Vsp,Power off sequence:Vsp-Vm-Vcc, the time can be set. 

  • What is the no load current of a brushless motor?

    The no-load current of a brushless motor is defined as the current the motor draws, with no load applied, at a specific voltage. The no-load current is measured in Amps and denoted “Io.” The key point here is that the current is measured at a specific voltage.

  • What is the voltage on no load?

    It is the potential difference (Voltage) across the terminals (Phases) before any load is connected or plugged in. For example, if you took a long power cord (Say 30 meters) to the bottom of the garden and before connecting anything you took the voltage reading this would be the no-load voltage.

  • What is the no load current of a 15kw motor?

    The no-load current of an SQ induction motor as a thumb rule can be assumed to be around 30 to 40% of full load amps. It means the motor consumes 30 to 40% of full power in no load condition. So a 15kw motor will consume around 5kw power when run in no load condition.

  • What is a no load test?

    The open-circuit test, or no-load test, is one of the methods used in electrical engineering to determine the no-load impedance in the excitation branch of a transformer. The no load is represented by the open circuit, which is represented on the right side of the figure as the "hole" or incomplete part of the circuit.

  • Why no load test at rated voltage?

    If the voltage deviates from the rated value, since the magnetic induction in the transformer core is in the saturation section of the magnetization curve, the no-load loss and no-load current will change sharply. Therefore, the no-load test should be carried out at the rated voltage.