How does magnetic voltage regulator reduce noise?

Many people do not understand what magnetic voltage regulator is, in fact, it is used everywhere in the electricity industry. How does the magnetic voltage regulator work? How to maintain magnetic type voltage regulator?

l What is a magnetic voltage regulator?

l How does magnetic voltage regulator reduce noise?

l How to maintain magnetic voltage regulator?

What is a magnetic voltage regulator?

magnetic voltage regulator is a kind of no mechanical transmission, no contact voltage regulator, can drive the load for smooth stepless pressure regulation. Voltage regulation is controlled by DC current, can be open loop manual control, can also be realized according to different control signals closed-loop automatic control, it is the executive element of automatic control system.

How does magnetic voltage regulator reduce noise?

1. The main reason for the noise generated by magnetic regulator core is that the size of silicon steel sheet will change slightly under the action of alternating magnetic field. Because the variation cycle of magnetostriction is half a cycle of the frequency of the power supply, the vibration of the equipment body caused by magnetostriction is based on the frequency of twice the frequency of the power supply, so the vibration of the silicon steel sheet is mainly caused by the magnetostriction characteristics of ferromagnetic materials.

2. The size of magnetostrictive ratio is related to the material of silicon steel sheet. The greater the magnetostrictive ratio, the greater the noise. When the magnetic field intensity is the same, the good silicon steel sheet magnetostriction is small, so the noise is small. Magnetostrictive ratio is also related to the strength of the magnetic field, the stronger the magnetic field, the more noise.

3. Magnetostrictive ratio is also related to whether the surface of the silicon steel sheet is painted and annealed, because the coating has adhesion to the silicon steel sheet, which can avoid the deformation of the silicon steel sheet. The magnetostriction of silicon steel sheet annealed under the same magnetic field intensity is much smaller than that of non-annealed silicon steel sheet. This is because the selection of good annealing process can reduce the magnetostriction exponentially.

How to maintain magnetic voltage regulator?

1. Always pay attention to the output current should not exceed the rated value, otherwise easy to reduce the life of the product, or even burn;

2. Rotate the hand wheel slowly and evenly when using, so as not to cause brush damage or spark;

3. Should often check the use of the magnetic type voltage regulator, such as brush wear too much, defect, should be timely damaged for the same specification of the brush, and 0 sandpaper pad in the brush under the rotation of the hand wheel several times, so that the bottom surface of the brush smooth, good contact, can be used;

4. Coil and brush contact surface, should always keep clean, otherwise easy to increase the spark and burn the coil surface. If the coil surface burning black spots, can be used to rub cotton with alcohol, until the surface spots removed;

5. From the power supply to the equipment, the equipment to the load wire and wire terminal should be in good contact and can pass the rated current of the magnetic voltage regulator;

6. When moving the product shall not use the hand wheel, but should use the handle or lift the whole product to move;

7. magnetic voltage regulator often protect clean does not allow water droplets, oil and other fall into the product, the product must be regularly cut off to remove the dust accumulated inside.

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