Efficient and uniform heating device for motor hot jacket

Abstract

The invention discloses an efficient and uniform heating device for a motor hot jacket. The device comprises an induction coil capable of matching an inner cavity of the motor hot jacket and an alternating current power supply module connected with the induction coil, and the induction coil is a multi-turn hollow spiral copper coil; the induction coil is wound in a grouping crosstalk mode to form n coil groups which are connected in series, the hollow spiral copper coils in each coil group are uniformly wound, the winding radiuses of the hollow spiral copper coils in the n coil groups are the same, and the longitudinal distance between every two adjacent coil groups is larger than the outer diameter of each hollow spiral copper coil; n is an integer, and n is greater than or equal to 2. According to the invention, the heating efficiency and the heating uniformity can be improved.

Description

technical field [0001] The invention belongs to the technical field of electromagnetic induction heating, and in particular relates to a high-efficiency and uniform heating device for a thermal sleeve of a motor. Background technique [0002] With the rapid development of industrial technology, green energy saving has become one of the directions for enterprises to enhance their competitiveness. Electromagnetic induction heating is one of the new green and environmentally friendly heating processes that convert electrical energy into heat energy. Not only that, electromagnetic induction heating has the characteristics of strong versatility and convenient maintenance because there is no physical contact. The metal heat sleeve around the coil is a good conductor. The alternating magnetic field generates an induced current in the conductor, that is, eddy current. The eddy current makes the atoms in the metal move irregularly at high speed, collide with each other and rub agains...

AI Technical Summary

Problems solved by technology

However, since the top of the heated motor heat sleeve is exposed in the air, the magnetic field lines generated by the induction coil form a closed loop nearby, so most of the magnetic force lines gather in the upper and middle parts of the electrode heat sleeve, and the magnetic force lines in the middle and lower parts of the electrode heat sleeve are sparse, resulting in the axial direction of the motor heat sleeve. The uniformity of temperature distribution is poor, and there are problems such as local overheating

Especially when heating the motor with a T-shaped process slot dug on the top, it is easy to cause ablation at the T-shaped process slot because it cannot meet the temperature uniformity requirements

Images