Dry type iron-core starting reactor for cold water medium-pressure unit of air conditioner

Abstract

The invention discloses a dry type iron-core starting reactor for a cold water medium-pressure unit of an air conditioner, belonging to the field of starting devices of motors. An insulation cylinder is arranged between an iron core and a coil, a first supporting rod is arranged between the iron core and the insulation cylinder, an upper cushion block and a lower cushion block are arranged on the upper end and the lower end of the coil, a pair of upper clamp pieces is arranged above the upper cushion block and is connected through a first piercing screw rod, a pair of lower clamp pieces is arranged below the lower cushion block and is connected through a second piercing screw rod, a drawing screw rod is connected between the pair of upper clamp pieces and the pair of lower clamp pieces, a compression nail is arranged on the pair of upper clamp pieces, a glass fiber cylinder is arranged on the inner side layer of the coil, a second supporting rod is arranged between the glass fiber cylinder and the insulating cylinder, the outer side of the glass fiber cylinder is provided with an epoxy glass laminated sheet, an insulation supporting strip is arranged between the epoxy glass laminated sheet and the glass fiber cylinder, the outer side of the epoxy glass laminated sheet is wound with a winding and a compression ring, a wire outgoing end rind is arranged between the winding and the compression ring, and the outer side layer of the winding is externally provided with an insulating layer. The dry type iron-core starting reactor has the advantages of being reduced in size, saving the cost and preventing creepage phenomena on the surface of the coil.

Description

technical field [0001] The invention belongs to the technical field of motor starting devices, and in particular relates to a dry-type iron core starting reactor for an air-conditioning cold water pressure unit. Background technique [0002] Medium-voltage motors generally refer to motors with a rated voltage of 3KV-10KV. The motor has large capacity, high starting voltage, and large starting current. If it is started directly, it will cause the motor to malfunction or burn out. In order to overcome this phenomenon, the method of reducing voltage is usually used to start the motor. At present, the commonly used method of reducing voltage is to connect the starting reactor in series in the winding. A general dry-type starting reactor has only one pair of heads without taps, and the coil adopts an integrally encapsulated structure, and only one layer of insulating film is wrapped around the outside of the coil. The coil is a single air gap structure relative to the iron core, ...

AI Technical Summary

Problems solved by technology

A general dry-type starting reactor has only one pair of heads without taps, and the coil adopts an integrally encapsulated structure, and only one layer of insulating film is wrapped around the outside of the coil. The coil is a single air gap structure relative to the iron core, and the distance between the two is large. , these characteristics make the reactor have the disadvantages of large volume, low insulation level, low electric strength, poor heat dissipation capability and poor paint penetration effect inside the coil, and can only meet one starting condition.

Images