How to judge whether the DC 110V motor of the elevator door base is burned out 10

Hello:— 1. DC motor or AC motor, all "burned" motors can smell a strong burnt smell at the junction box, which is a commonly used sensory judgment method in maintenance.

2. After the motor burns out, the insulation resistance will break down. Therefore, it is a necessary step to measure the insulation resistance with a 500V shake meter.

3. If necessary, you can open the end cover of the motor for inspection. If the enameled wire is intact, it can be energized and run no-load for trial operation. If the enameled wire has been burned, it is damaged.

Simply use one end of the multimeter buzzer to touch the iron shell of the motor, and the other meter pen to measure the inlet end of the motor, if it has been burned, the beep will sound.

When the motor burns out, the insulation resistance breaks down. Therefore, it is a necessary step to measure the insulation resistance with a 500V shake meter. If necessary, the end cap of the motor can be opened for inspection.

If the enameled wire is intact, it can be energized and run no-load for trial operation. If the enameled wire has been burned, it is damaged.

Motor refers to an electromagnetic device that realizes the conversion or transmission of electrical energy according to the law of electromagnetic induction. Generators are denoted by the letter G in the circuit. Its main role is to use mechanical energy to convert into electrical energy, the most commonly used at present is to use heat, hydro energy, etc. to drive the generator rotor to generate electricity, with the increasing maturity of wind power generation technology, wind power has slowly entered our lives.

Transformers, in some books, are called stationary motors. From the definition of motor, it is found that there is a reason for saying this.

Use a digital multimeter to test the coil resistance value in the low resistance setting:

1. For single-phase motors that do not distinguish between the main and auxiliary windings, the number of turns and wire diameter parameters of the main and auxiliary windings are the same. If the difference is obvious, it can be inferred that the group of coils with small resistance values has an inter-turn short circuit, and the coil is most likely to be short-circuited if the coil is overheated and scorched.

2. For the single-phase motor that distinguishes the main and auxiliary windings, the resistance values of the two windings are different, and the parameters of the motor or the parameters of the same type of motor are required as a comparison to obtain an accurate parameter comparison.

When the motor coil is seriously burned, the coil resistance may be close to zero, then it is easier to judge, when using, the starting capacitor and the running capacitor are disconnected, otherwise it will cause misjudgment.

1. Judge by measuring the insulation resistance value of a single motor coil.

The resistance of the main and auxiliary windings to the shell should be greater than that of the 500V shake gauge, if it is approximately zero, it can be suspected that the insulation layer has been burned and bumped.

Remove the short connector of the motor junction box, disconnect the electrical connection of the main and auxiliary windings, and test the resistance value of the main and auxiliary windings with a shake meter when the resistance value is approximately zero, it can be suspected that the insulation is burned.

2. Use the digital multimeter to test the resistance value of the coil in the low resistance level.

For a single-phase motor that is not divided into main and auxiliary windings, the number of turns and wire diameter parameters of the main and auxiliary windings (i.e., starting windings and running windings) are the same. If the difference is obvious, it can be suspected that the group of coils with small resistance value has an inter-turn short circuit, and the inter-turn short circuit is mostly caused by overheating and scorching of the coil.

The resistance value of the two windings of the single-phase motor divided into main and auxiliary windings is different, and the motor parameters or the parameters of the same type of motor need to be compared in order to obtain accurate parameter comparison.

When the coil of the motor is seriously burned, the coil resistance may be close to zero, which is easier to judge.

3. When using the above judgment method, the starting capacitor and the operating capacitor should be disconnected, otherwise it will cause misjudgment.

Single-phase motors generally add starting capacitors, after removing the capacitors are three wires, their winding method is that the two groups of coils have a common head, and the resistance and on-off can be measured with the electric resistance of the table.

Windings can be measured with a multimeter, typically in the range of a few hundred ohms. The most accurate way is to make sure that there is no problem with the capacitor and power supply to connect to the motor, if it does not rotate, the motor is broken.

Measure the three wires drawn from the single-phase motor, and the resistance value indicates that the coil is not broken.

Measure the on-off ah!

Its practical way to withstand pressure You pay attention to whether there is a sound of it.

No, the performance of the DC motor is not the same as the AC motor, the voltage is low, its speed will be low, and the output will be low, which is also the reason why the inverter has not been promoted to before, and the DC motor is used for speed regulation.

The DC 220V motor will not burn out when connected to the DC 110V, but it will not start, or the speed will decrease.

Use a multimeter to detect the motor coil to know, first, measure the shell, the multimeter ohmic gear high-end, one end of the pen is connected to the coil, one end is connected to the body shell, the measured value is 0, indicating that there is no shell. Contrarily.

Second, the test of the broken circuit, the multimeter ohm, the pen are connected to both ends of the coil to see whether there is an open circuit between them, and the measured value is 0 to indicate that the coil has been broken.

3. Measure the short circuit, the multimeter ohm gear is low, and the meter pen is connected to both ends of the coil respectively to see whether the resistance value of the three-phase coil is the same, and the three values measured are the same as that there is no short circuit.

The first is to see if there is heat and smoke in operation. The second is that the motor trips after heating and smoking, and fails to start again, which is detected by a multimeter, and there is an open circuit phenomenon in the motor control loop.

Measure the resistance balance of the three-phase winding, and the insulation resistance of the phase and phase winding, each phase and the shell is normal.

Use a megohmmeter to measure whether there is a short circuit between the windings and between the windings and the ground, and you can also use a multimeter to measure the difference in accuracy.

The motor that has burned out is judged by how to measure it with a multimeter.

Take the contract number or production number, go directly to the after-sales service of Oubin Elevator to buy, if you buy it from the first business, just ask the first businessman, they know where it is produced.

AC, 110 volts is the standard electricity in Japan.

110V AC is abbreviated as AC110V; 110V DC is abbreviated as DC110V.

DC 110V electrical appliances should be powered by 110V DC.

AC 110V electrical appliances, is to use AC 110V power supply, this is in foreign countries, such as Japan, such electrical appliances generally need to rectify the power supply first, and then chopper voltage transformation (the old electrical appliances in the past to first transform the voltage and then rectify and then stabilize the voltage), in order to supply electrical appliances. After 110V AC rectification, the DC voltage is about 150 volts.

The power supply of these two electrical appliances should generally not be mixed, otherwise it will be regretted later. 110V AC motors should never use direct current, and conversely, 110V DC motors should never use alternating current. Otherwise smoke.

Let's talk about the safety loop and door lock first, because the line they want to lay is very long, so the voltage can not be too low, but with a voltage of 220V, if there is a leakage accident, it is easy to power people, and the voltage of 110V will not have much reaction even if it is electricity, at least I personally feel that 110V electricity does not die.

How should I say the 110V of the brake, because I am used to it, you can change the coil of 220, and then use the voltage of 220, now the elevator is not all 110V, there are also 24V, 220V, all of them.

As for the control loop, it's because there is 24V directly on the PLC controller, and it's also out of habit, you can also use other voltages, but it's more than 24V.

The control circuit generally uses DC, and the working current uses AC, in fact, according to the selected equipment, such as motors, DC is also used.

The meters are mostly DC.

This needs to be seen according to the original design drawings of your elevator.

The DC one is not called a transformer, it is a power switch, and inside is the circuit board, and the burn fuse means that the circuit board has been short-circuited and burned out.

There will be a colorful bell sound of a sprinkler Supplement: What about 110V power supply and 220V electrical appliances?

It must be burned, 110V is the foreign power supply voltage standard.

The chance of burnout should be greater than 99 percent.

Twice the voltage, it will inevitably smoke and burn out immediately.

You have to burn it, buy a transformer.

The DC system of the substation stores energy with a battery and replenishes the energy with a charger to continuously transmit electric energy to the protection, monitoring and communication system of the whole station to ensure its safe, stable and reliable operation. The DC system is an insulated system, and under normal circumstances, the insulation resistance of the positive and negative electrodes to the ground is equal, and the voltage of the positive and negative electrodes to the ground is balanced. When a point of grounding occurs, the voltage of the positive and negative electrodes to the ground changes, the voltage of the grounding electrode decreases, and the voltage of the non-grounding electrode increases, and at the moment of grounding occurrence and recovery, the circuit of the intermediate relay tripping through a long distance and long cable may cause the intermediate relay to trip misactively because of its large distributed capacitance (the intermediate relay with a larger starting power can be used to avoid), in addition, it has no impact on the operation of the whole station protection, monitoring and communication devices.

However, there is a point grounding DC system, the reliability of power supply is greatly reduced, because when the grounding point is not eliminated, the second point grounding occurs, it is very easy to cause DC short circuit and switch misoperation, rejection, so when the DC point is grounded, although the equipment can continue to operate, but the grounding point must be found as soon as possible, immediately eliminated or isolated.

References are provided for reference.

Hope it helps.

The DC system of the power plant is branched out.