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Necessary parameters for electromagnet design

Necessary parameters for electromagnet design

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  • Time of issue:2021-06-29
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(Summary description)Necessary parameters for electromagnet design

1. The concept of itinerary:

    The displacement of the moving iron core relative to the fully suction position is shown in the figure below:

2. strength:

     When the electromagnet is energized, it will generate power. Under the same power consumption, the power of different stroke positions is different; under the same stroke, the power of different power consumption will also be different; different power consumption corresponds to different energization rates (that is, duty cycle). ratio). The usual rule is: ⑴stroke ↑power↓(⑵power consumption↑power↑. When applying electromagnets, safety performance should be considered, that is, the test of power should be measured after the temperature rise of the electromagnet is stable under a certain energization rate The power of the electromagnet is the power of the electromagnet. Under normal circumstances, the initial power is about 1.5 times the power after the temperature rise is stable. If the power-on rate of the product is very low (only a few times a day, and the time is very short), it can be safe The coefficient is reduced to 1.2 times.

Necessary parameters for electromagnet design

(Summary description)Necessary parameters for electromagnet design

1. The concept of itinerary:

    The displacement of the moving iron core relative to the fully suction position is shown in the figure below:

2. strength:

     When the electromagnet is energized, it will generate power. Under the same power consumption, the power of different stroke positions is different; under the same stroke, the power of different power consumption will also be different; different power consumption corresponds to different energization rates (that is, duty cycle). ratio). The usual rule is: ⑴stroke ↑power↓(⑵power consumption↑power↑. When applying electromagnets, safety performance should be considered, that is, the test of power should be measured after the temperature rise of the electromagnet is stable under a certain energization rate The power of the electromagnet is the power of the electromagnet. Under normal circumstances, the initial power is about 1.5 times the power after the temperature rise is stable. If the power-on rate of the product is very low (only a few times a day, and the time is very short), it can be safe The coefficient is reduced to 1.2 times.

  • Categories:Company
  • Author:
  • Origin:
  • Time of issue:2021-06-29
  • Views:0

Necessary parameters for electromagnet design

1. The concept of itinerary:

    The displacement of the moving iron core relative to the fully suction position is shown in the figure below:

2. strength:

     When the electromagnet is energized, it will generate power. Under the same power consumption, the power of different stroke positions is different; under the same stroke, the power of different power consumption will also be different; different power consumption corresponds to different energization rates (that is, duty cycle). ratio). The usual rule is: ⑴stroke ↑power↓(⑵power consumption↑power↑. When applying electromagnets, safety performance should be considered, that is, the test of power should be measured after the temperature rise of the electromagnet is stable under a certain energization rate The power of the electromagnet is the power of the electromagnet. Under normal circumstances, the initial power is about 1.5 times the power after the temperature rise is stable. If the power-on rate of the product is very low (only a few times a day, and the time is very short), it can be safe The coefficient is reduced to 1.2 times.

3. Power-on rate:

      The concept of energization rate is shown in the following formula. It means that the power-on time (On time) is divided by the time of a cycle (On time Off time). The popular name of the power-on rate is duty cycle. For example: if the energization time of an electromagnet is 1 second, and the power-off time is 3 seconds, then its energization rate is 1/(1 3)=25%

The energization rate is a very important parameter, because when the electromagnet is excited, it will cause the coil to heat up. If the heat is too high, it will burn the coil. The duty cycle or the longest energization time, as well as the power and heat dissipation of the electromagnet determine the temperature rise when the electromagnet is working, and also determine the energization rate.

4. insulation level

     The working temperature rise of the electromagnet and the ambient temperature during operation determine the insulation temperature class required by the electromagnet. There are the following classifications:

A=105℃, E=120℃, B=130℃, F=155℃, H=180℃, 200=200℃, 220=220℃, 250=250℃

5. power supply type and power

Different input current waveforms determine the working mode of the electromagnet: In the application, there may be: AC AC/DC (constant voltage source, constant current source, battery, dry battery, DC generator, capacitor), rectifier filter method, voltage range, The maximum available current and other factors use diode rectification.

In electromagnet applications, AC electromagnets can directly use alternating current. DC electromagnets must be converted to DC using a rectifier. The output power is proportional to the current (power) within a certain range. After the electromagnet reaches magnetic saturation, the power will no longer increase with the current (power). Similarly, temperature rise and current (power) Directly proportional.

6. protection measures for electromagnets

For some special occasions, the electromagnet needs to adopt some necessary protective measures, such as adding overheat protection, overcurrent protection and protection of the electromagnet drive control circuit.

7. Environmental factors and longevity

Environmental conditions and life needs are important considerations in the selection of electromagnet materials and surface treatment methods. Environmental factors include: temperature, humidity, magnetic or electric field; gas, liquid and solid pollution or corrosion, shock vibration, vibration, etc.

8. Connection method: installation, power supply, load. and size

Installation and connection: a). External bolt b). Screw hole on the electromagnet shell c). Card slot embedded in the power connection a). Lead b). Lead terminal c) Pin D. 187 quick connect pin. E. Others

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