Flexible induction heating power supply and its control method for fan bearing disassembly

Abstract

The invention provides a flexible induction heating power supply used for demounting and mounting a blower bearing and a control method of the flexible induction heating power supply. The flexible induction heating power supply comprises an induction heating power supply main circuit, a control circuit, a drive circuit and a protection circuit. The induction heating power supply main circuit is connected to an alternating current network to receive the alternating current. The control circuit generates PWM (pulse width modulation) signals. The drive circuit is connected between the control circuit and the induction heating power supply main circuit to receive the PWM signals generated by the control circuit so as to drive the induction heating power supply main circuit. The protection circuit is connected to the induction heating power supply main circuit to prevent the same from at least one of overvoltage, overheating, overcurrent and phase loss. The induction heating power supply main circuit is driven by the drive circuit to generate voltage signals and applies the voltage signals to a multi-core cable winding round the blower bearing, in this way, the multi-core cable is inducted and heated. So that a clearance occurs between the blower bearing and a blower spindle for the temperature difference, and the blower bearing is convenient to demount and mount.

Description

technical field [0001] The invention belongs to the field of wind power generation, and relates to a flexible induction heating power supply for dismounting and assembling bearings of large and medium-sized wind turbines and a control method thereof. Background technique [0002] The main shaft bearing of megawatt-level (such as 2.5MW) wind turbines (referred to as wind turbines) is large in size and weight, and wind farms are generally located in remote locations (mainly deserted beaches, mountains, grasslands and seasides), and the main shaft and bearings together The cost of transporting back to the factory for complete disassembly and assembly is high. Therefore, wind power generator manufacturers hope to develop a device that can take into account the disassembly and assembly of the main shaft bearing, and the device has a wide range of applications and is small in size and easy to carry. figure 1 A schematic diagram showing the disassembly and assembly of the main sha...

AI Technical Summary

Problems solved by technology

At present, domestic induction heating devices have a single type of heating object, constant operating frequency, and uncontrollable temperature distribution of the heating object, which cannot meet the increasingly diverse needs of the modern machinery and equipment manufacturing industry for induction heating products.

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