The difference between electromagnetic speed regulating motor and variable frequency speed regulating motor

1. Different technical characteristics

1. Electromagnetic speed regulation motor: It has a wide speed regulation range, open-loop speed regulation, large starting torque, small control power, negative speed feedback, and high mechanical hardness when the automatic adjustment system is used.

2. Frequency conversion speed regulating motor: low noise. By optimizing electromagnetic design, ventilation conditions, structural dimensions and other technologies, the noise of M2JA series motors is low. The bearing load capacity is high. The motor uses deep groove ball bearings with long life. The 80-132 center height motors are permanently lubricated, and 160-355 are equipped with oiling devices.

2. Different principles

1. Electromagnetic speed regulating motor: It consists of three parts: ordinary squirrel cage asynchronous motor, electromagnetic slip clutch and electrical control device. The asynchronous motor is used as the prime mover. When it rotates, it drives the armature of the clutch to rotate together. The electrical control device is a device that provides excitation current for the excitation coil of the slip clutch.

2. Variable frequency speed regulating motor: an energy control device that converts industrial frequency power into another frequency by using the on-off function of power semiconductor devices.

3. Different applications

1. Electromagnetic speed regulating motor: widely used in printing presses, saddle stitchers, wireless binding, high-frequency drying linkage machines, and chain boiler grate control.

2. Variable frequency speed regulating motor: Especially with the increasingly widespread application of frequency converters in the field of industrial control, the use of variable frequency motors has become increasingly widespread. It can be said that due to the superiority of variable frequency motors over ordinary motors in frequency conversion control, it is not difficult to see variable frequency motors wherever frequency converters are used.

Electromagnetic speed regulating motor

Electromagnetic speed regulating asynchronous motor is also called slip motor. It is an AC stepless speed motor that uses DC electromagnetic slip constant torque control. It has a series of advantages such as wide speed regulation range, open-loop speed regulation, large starting torque, small control power, speed negative feedback, high mechanical hardness when the automatic adjustment system is in use, so it is widely used in printing presses, saddle stitchers, wireless binding, high-frequency drying linkage machines, and chain boiler grate control.

Variable frequency speed motor

Variable frequency motor is also called variable frequency motor for short, which is a general term for motors driven by frequency converters. In fact, the motor designed for frequency converters is a special variable frequency motor. The motor can achieve different speeds and torques under the drive of the frequency converter to adapt to the changes in load requirements. Variable frequency motors are developed from traditional squirrel cage motors. The traditional motor fan is replaced by an independent fan, and the insulation performance of the motor winding is improved. In situations where the requirements are not high, such as low power and frequency working at the rated working frequency, ordinary squirrel cage motors can be used instead.