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As the motor current increases, will the torque also increase?

As the motor current increases, will the torque also increase?

Torque is an important performance index of motor products, which directly reflects the ability of the motor to drive the load. In motor products, the starting torque, rated torque and maximum torque reflect the ability of the motor in different states. Different torques...

2023-03-07

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Why are variable frequency motors more prone to hidden shaft currents?

Why are variable frequency motors more prone to hidden shaft currents?

Shaft voltage is a byproduct of the operation of a rotating electrical machine, that is, it accompanies the operation of the electrical machine. Whether it is a power frequency motor or a variable frequency motor, there will be shaft current hidden dangers to varying degrees. In comparison, the shaft current problems of high voltage motors and variable frequency motors are relatively serious. The shaft voltage of the power frequency motor is mainly caused by the asymmetry of the magnetic circuit, unipolar effect, electrostatic induction, capacitive current, etc., but the essential reason is the flux pulsation. However, as long as the power supply is stable and the design is symmetrical, there are no major defects in the manufacturing process. When the power frequency motor is running, especially the potential difference between the two ends of the shaft of the low-voltage motor is very small, which is not enough to generate shaft current that endangers the motor bearing system. For a variable frequency motor powered by a frequency converter, the shaft voltage of the motor is mainly generated by the vector sum of the three-phase output voltage of the power supply and the non-zero zero seat component. Compared with industrial frequency motors, variable frequency motors naturally have unavoidable factors that generate shaft currents.

2023-03-07

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How to understand the class Idivision2 of IECEx/ATEX explosion-proof certification?

How to understand the class Idivision2 of IECEx/ATEX explosion-proof certification?

Class 1 division 1 motors are used for long-term explosive gas in the working environment Class 1 division 2 motors are used in working environments where explosive gases occasionally appear

2023-02-03

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Which explosion-proof level is higher between exdiibt4 and exdiict4 (how to distinguish the explosion-proof level)

Which explosion-proof level is higher between exdiibt4 and exdiict4 (how to distinguish the explosion-proof level)

The explosion-proof grade is exdiict4, which is called ct4 explosion-proof motor. The available range of CT is wide.

2023-02-03

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EAC Certification & Customs Union Certification & CU-TR Certification

EAC Certification & Customs Union Certification & CU-TR Certification

EAC certification is the certification of the countries of the Customs Union. The Customs Union is an economic bloc led by Russia, including Russia, Belarus (formerly known as "Belarus"), and Kazakhstan.

2023-02-03

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