What are the common electrical faults and solutions for brushless motor motor automatic load tester?
The common electrical faults and solutions of brushless motor motor automatic load tester are as follows:
1、Power failure
No voltage output from input power supply
Reason: power plug is not plugged in, power cord is damaged, fuse is blown, power switch is faulty.
Solution: check whether the power plug is plugged in tightly, if loose, then plugged in; see whether the power cord is damaged or broken inside, if any, then replace the power cord; check whether the fuse is blown, if so, then replace the fuse with the same specification, and check whether there is a short circuit and other causes of the fuse; check whether the power switch can be normal conduction, if damaged, then replace the switch.
2, the output voltage is not stable
Failure causes: power module failure, filter capacitor damage, grid voltage fluctuations.
Solution: use a multimeter and other tools to detect the output voltage of the power supply module, if abnormal, then repair or replace the power supply module; check whether the filter capacitors have bulging, leakage and other damage, if any, then replace the capacitors; can be installed to stabilize the input voltage regulator to stabilize the grid voltage, reduce the impact of voltage fluctuations on the test machine.
3, motor-driven faults
Motor can not start
Failure causes: drive circuit failure, motor winding short circuit or disconnection, controller failure, motor overload protection trigger.
Solution: Check whether the power tube, chip and other components in the drive circuit is damaged, if damaged, then replace it; use a multimeter to detect the resistance of the motor winding to determine whether there is a short circuit or broken circuit, if there is a problem, then repair or replace the motor; check whether the controller's output signal is normal, if there is a failure, then repair or replace the controller; check whether the load is too heavy, reduce the load and reset the overload protection device.
4、Motor running jitter or abnormal noise
Failure causes: improper setting of motor drive parameters, motor bearing damage, uneven motor magnetic field, electromagnetic interference.
Solution: Re-adjust the motor drive parameters, such as current loop, speed loop parameters, etc.; check whether the motor bearings are worn or damaged, if any, then replace the bearings; check whether the motor's magnets are off, demagnetization, etc., if any problem, then repair or replacement of the motor; check whether the wiring of the tester is reasonable, whether there are strong and weak parallel power and other interference caused by the situation, take shielding, isolation and other anti-interference measures.
5、Sensor failure
Current sensor measurement inaccuracy
Failure causes: sensor aging, sensor installation location is not appropriate, sensor wiring is loose, external magnetic interference.
Solution: calibrate the current sensor or replace the sensor with a new one; adjust the installation position of the sensor to ensure that it is firmly installed and measured accurately; check whether the wiring of the sensor is loose, if any, then tighten the wiring; shielding of the sensor to reduce external magnetic interference.
6, temperature sensor failure alarm
Failure causes: temperature sensor damage, poor sensor probe contact, poor heat dissipation resulting in high temperature.
Solution: Use a multimeter and other tools to detect the temperature sensor resistance is normal, if abnormal, then replace the sensor; check whether the sensor probe and the object under test contact is good, to ensure that the contact is tight; check whether the cooling fan of the tester is running normally, whether the cooling channel is blocked, clean up the cooling channel, maintenance or replacement of the cooling fan.
7、Communication faults
Interruption of communication with the host computer
Failure causes: communication interface damage, communication line failure, communication protocol setting errors, host computer software failure.
Solution: Check whether the communication interface is loose, oxidation and other damage, if any, repair or replace the interface; check whether the communication line is broken, short-circuit and other problems, if any, repair or replace the line; confirm that the communication protocol settings and the host computer to match, if any error is reset; check whether the host computer software is functioning normally, there is no software conflict and other issues, you can try to restart the software or software updates. software update.
8、Error or loss of data transmission
Cause: Electromagnetic interference, improperly set communication baud rate, communication equipment failure.
Solution: Take shielding, grounding and other anti-interference measures to reduce the impact of electromagnetic interference on communication; adjust the communication baud rate to ensure that the two sides of the communication baud rate is the same; check the communication equipment, such as serial servers, network cards, etc., whether they work properly, if there is a failure to repair or replace the equipment.
※ If through the above ways and means still can't solve the equipment failure, please contact Xinhui electromechanical equipment limited company technical specialist through the page chat tool to seek help.
