How to judge the quality of a stepper motor

Without connecting any equipment and wires, put the stepper motor.

Each wire is separated, do not touch the line, rotate the shaft by hand, a good motor, it should only need a certain force, it can rotate smoothly, there is no card in the middle, if there is a certain position in the middle of the card or completely unable to rotate, indicating that the motor has been broken, it may be that the bearing is displaced, the internal rotor and stator are worn. The cause of damage should be caused by excessive external force. A multimeter can be used.

The amount of impedance of two "adjacent" phases.

should be equal to the coil impedance given by the product.

When the equipment detects that it is idling, it should be able to reach the specified speed, and the noise emitted should be stable at the general speed. Otherwise, load testing is required. The specific test parameters need to be combined with the load torque and the torque of the motor.

The larger the motor, the greater the force required to twist, and the general stepper motor cannot be twisted by manpower at all. (The more threads you twist together, the more force is required.) If it doesn't work, it means that the coil is broken.

Simple judgment method (hybrid stepper motor): 1. The electric energy is locked, the torque output is normal, and the angle is correct, the motor is good, otherwise there is a problem; 2. In the state of power-off, rotate the motor shaft by hand, pay attention to the short circuit of each lead wire, a good motor should have uniform resistance, and can be rotated by hand; When the motor leads are screwed together (short circuit), the torque of the motor shaft is the nominal torque of the motor, that is, the motor is required to rotate the motor shaft with a torque as large as the nominal torque of the motor, otherwise the motor is broken.

Simple judgment method (hybrid stepper motor): 1. The electric energy is locked, the torque output is normal, and the angle is correct, the motor is good, otherwise there is a problem; 2. In the state of power-off, rotate the motor shaft by hand, pay attention to the short circuit of each lead wire, a good motor should have uniform resistance, and can be rotated by hand; When the motor leads are screwed together (short circuit), the torque of the motor shaft is the nominal torque of the motor, that is, the motor is required to rotate the motor shaft with a torque as large as the nominal torque of the motor, otherwise the motor is broken. It's purely empirical, I don't know if I'm satisfied.

1. How to test the quality of AC three-phase motor?

1. Shake the meter, 500V can shake the meter, and shake the insulation resistance of the wire on the three binding posts to the motor shell, which should be above Europe, indicating that there is no short circuit to the ground.

2. Multimeter measurement: measure the resistance between the three phases of ab c, whether it is equal, it should be about the same, and the difference is too much, but it will not take long, remember that the larger the motor, the smaller the resistance! But you can't all three phases be 0 ohms, unless you are particularly large, such as a motor above 50kw!

Remember, if it is a speed regulating motor, the resistance value of the 6 terminals is not the same!

3. Check the bearings and fans, and generally wrap the motor to let them all be replaced! Because sometimes the bearing will burn the motor!

4. The no-load current of the motor is generally 10% to 50% of the rated current, and sometimes the idling current of the motor is still zero!

5. When the rated current of the motor is running, it is running at full load, and the output power is basically 100%. The running current is small, which means that the output power of the motor becomes smaller, and it is a light load operation.

2. How to detect the quality of AC single-phase motor?

Use a 500V megohmmeter to measure the insulation resistance of the motor winding and the shell, which should not be less than the megohm; Use a multimeter to measure each lead wire of the winding, and there is no broken wire; All of the above meet the requirements, and the motor is good.

It is more convenient to use a pointer multimeter to detect the quality of the capacitor (there is also a digital meter with a capacitance file, which can be measured directly).

It is good to dial the multimeter to the 1k or 10k resistance level, measure the 2 leads of the capacitor, and slowly return to the left capacitor after the meter needle is quickly deflected to the right; Always biased to the right indicates that the capacitor is broken; If the pointer does not move, the capacitor will be disconnected or the capacitance will be gone. In this way, only the quality of the capacitor can be judged.

Three. Is a DC motor good or bad?

First see if there is a broken wire and measure whether the resistance is normal.

If it is a brushed DC motor, the rotor can be rotated and the output DC can be measured with a multimeter to see if the output DC is normal.

If it is a brushless DC motor and the three-phase is drawn, the rotor can be rotated, and the multimeter is used to measure whether the output alternating voltage is normal.

The output voltage is proportional to the rotational speed.

Measurement method of motor quality:1. Check whether the insulation resistance of the motor coil is greater than the megaohm, if it is greater than the megaohm, it means that the insulation performance of the motor is good;

2. Use the multimeter resistance file to test whether the DC resistance of the 3 windings of the motor is the same, if it is the same or the size deviation of the DC resistance of the 3 windings is very small, it means that there is no inter-turn short circuit between the coils of the 3 windings;

3. Manually rotate the shaft of the motor, and check whether there is any disc immobility, abnormal noise, etc.

4. Check the quality of the motor, check whether the insulation resistance of the motor coil is greater than the megaohm with the insulation resistance shake table, if it is greater than the megaohm, it means that the insulation performance of the motor is good.

The method of judging whether the single-phase or three-phase motor is burned out with a multimeter is only applicable to small motors with DC resistance of coil windings above 1 ohm, and the method of judging whether a three-phase motor is burned out is relatively simple, and the DC resistance resistance of the three-phase winding is balanced with a multimeter, and if it is not balanced, you can judge that the three-phase motor is burned out.

Second, the DC resistance of the starting winding of the single-phase motor is generally greater than that of the running winding, and the simplest way to distinguish it is; 1.First, use a multimeter to measure the DC resistance from the common end to the running winding end and the starting winding end.

2.Then use a multimeter to measure the DC resistance from the running winding end to the starting winding end.

3.If the arithmetic sum of the two measurements in "1" is not equal to the measurements in "2", then the motor must have burned out!

If it is equal, it is best to compare it with the same model motor, or find the factory parameters of the motor for comparison. to judge the quality of the motor.

To add that, the capacitance should be disconnected when measuring a single-phase motor. Single-phase motor short circuit is that you have to have a normal resistance value as a reference. It's good to use the two methods of smelling and seeing.

Hello, you can check it like this, 1. Check whether the insulation resistance of the motor coil is greater than the megaohm with the insulation resistance shake table, if it is greater than the megaohm, it means that the insulation performance of the motor is good; 2. Use the multimeter resistance file to test whether the DC resistance of the three windings of the motor is the same, which means that there is no inter-turn short circuit between the coils of the three windings.

Measurement method of motor quality: 1. Check whether the insulation resistance of the motor coil is greater than the megaohm with the insulation resistance shake table, if it is greater than the megaohm, it means that the insulation performance of the motor is good; 2. Use the multimeter resistance file to test whether the DC resistance of the 3 windings of the motor is the same, if it is the same or the size deviation of the DC resistance of the 3 windings is very small, it means that there is no inter-turn short circuit between the coils of the 3 windings; 3. Manually rotate the shaft of the motor, and check whether there is any disc immobility, abnormal noise, etc.

Check the quality of the motor: 1) Check whether the insulation resistance of the motor coil is greater than the megaohm with the insulation resistance shake table, if it is greater than the megaohm, it means that the insulation performance of the motor is good; 2. Use the multimeter resistance file to test whether the DC resistance of the 3 windings of the motor is the same, if it is the same or the size deviation of the DC resistance of the 3 windings is very small, it means that there is no inter-turn short circuit between the coils of the 3 windings;

Questions. <>

How to test with a multimeter.

Use the multimeter resistance file to test whether the DC resistance of the 3 windings of the motor is the same, if the same or the size of the DC resistance of the 3 windings is very small, it means that there is no inter-turn short circuit between the coils of the 3 windings.

Questions. <>

Which one. K is the ohm file.

Use the multimeter resistance file to test whether the DC resistance of the 3 windings of the motor is the same, if the same or the size of the DC resistance of the 3 windings is very small, it means that there is no inter-turn short circuit between the coils of the 3 windings.

Questions. <>

Which test is used. It's okay, use a large number of ranges first.

Of course, there is no rule, but their resistance can be measured, and if there is no resistance, the coil is broken

Step 1: Use a shake meter to measure the insulation of the motor to the ground. It should be noted that for 380V motors, 500V shake gauge should be used, such as 1000V or 2500V shake gauge shake test may break down the motor insulation.

Shake the meter flat, shake the rocker at a speed of 120 revolutions per minute, and insulate the binding post of the shaker and the motor shell to not less than megaohms. Of course, the higher the insulation value, the better, and in actual work, it is generally tens of megabytes, hundreds of megabytes or even infinity. If the insulation to the ground is too low, it is necessary to consider the maintenance of the motor.

For wound motors, the insulation between the shaker and the rotor, and between the rotor and the ground should be qualified. For the shaking test of high-voltage motors, 2500V shake meters are generally used, and the insulation value should not be less than 1m kV, such as 10kV motors, and the insulation value to the ground should not be less than 10 trillion ohms.

Step 2: Use a multimeter to measure whether the three-phase resistance value is balanced. If the motor connecting piece is not removed, the star connection motor can measure the resistance between each phase and the star point, and the three-phase resistance value should be basically equal.

The angular connection motor can be measured in three phases and two by two, and the resistance value should be basically equal. If the three-phase resistance of the measured motor is severely unbalanced, there is a possibility of an inter-turn short circuit.

Step 3: Also check the mechanical parts of the motor. For example, the quality of the bearing, whether the motor is swept or not. In the case of no load of the motor, it can be manually rotated to observe whether the motor rotates lightly and whether there is any abnormal noise.

If there is no abnormality in the above checks, you can power on the motor for experiment.

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A: Stepper motor.

The test is divided into physical and electrical performance tests.

Physical properties: first observe whether there is wear, bumps, cracks, etc., and rotate the motor shaft to see if there are stuck points. Use balancing.

Test the instrument to see if it meets its requirements, whether there is jitter, abnormal noise, etc.

Electrical performance test: The motor comprehensive test system is used to test the motor resistance, insulation, alternating resistance, turn-to-turn, reverse embedding, torque, speed, power and other parameters to see whether it meets its production specifications.

Stepper motor testing requires the use of some specialized testing tools, and here are some basic test steps:

1.First, the test tool needs to be connected to the controller of the stepper motor.

2.Make sure that the various interfaces of the stepper motor are connected correctly, such as the power interface, control signal interface, etc.

3.Open the test tool and set it up and calibrate it according to the tool's instructions.

4.Select the model and parameters of the stepper motor in the test tool and test it.

5.During the test, the motion state and speed of the stepper motor can be observed, and the test results can be recorded.

6.If the test result is abnormal, troubleshooting can be performed according to the diagnostic information provided by the test tool or the instruction manual of the stepper motor.

It should be noted that safety precautions need to be taken when testing stepper motors to avoid electric shocks and other accidents. At the same time, the instruction manual of the test tool and stepper motor should be carefully read before the test to ensure the accuracy and safety of the test.

About the good or bad test of stepper motor:

Generally, do not connect the drive first, manually rotate the motor shaft, and feel whether it rotates smoothly. Normally, if you manually turn the motor shaft and turn it around, the resistance should be the same.

Then connect to the drive test, the control signal is the common yang mode, pul + connected to the signal power supply, pul-

connected to the control signal. If it is a common cathode mode, the pul+ is connected to the control signal, and the pul- is connected to the signal ground. If the control signal input of the driver is 5V level by default, you can directly connect PUL+ to 5V power supply, PU-

The contact test is carried out continuously, which is equivalent to manually generating pulses;

As long as the wiring between the motor and the drive is correct, the motor will take a step when touching.

First power on the drive, make sure the power indicator is normal? If it's not normal, the drive is bad; If the power indicator is normal, unplug the enable signal, twist the motor shaft by hand, whether the motor is forced, if not, the driver is bad; If the motor is forced, send a control pulse to the driver, whether the motor is running, if it is running, the driver is good; If it does not turn, determine whether the control signal level matches or not, if it does, the driver is bad; If it is not matched, adjust the control signal level, whether the motor is running or not, if it is running, the drive is good, otherwise it is bad.

The drive is powered on, if the power indicator is not on – the drive is broken;

Connect the motor, the driver is powered on, and the fault indicator light is on - the driver is broken;

Connect the motor, the driver is powered on, the motor is forced, but the motor does not rotate when the control signal is sent - the drive is broken;

Without the above several cases, there should be nothing wrong with the drive itself.