SUBMERSIBLE ELECTRIC MOTOR

• US 3,761,750 A
• Filed: 01/24/1972
• Issued: 09/25/1973
• Est. Priority Date: 01/24/1972
• Status: Expired due to Term

• Current Assignee: The Marley-Wylain Company
• Original Assignee: Ronald E. Green
• Inventors: Green, Ronald E.
• Primary Examiner(s): Skudy, R.
• Application Number:
  US05/220,100
• Time in Patent Office: 610 Days
• Field of Search: 310/87,89,71,88,43,91,68,72 103/87 318/195
• US Class Current: 310/87
• CPC Class Codes: H02K 11/40 Structural association with grounding devices
• CPC Class Codes: H02K 17/30 Structural association of asynchronous induction motors with auxiliary electric devices influencing the characteristics of the motor or controlling the motor, e.g. with impedances or switches
• CPC Class Codes: H02K 5/1285 of the submersible type
• CPC Class Codes: H02K 5/225 Terminal boxes or connection arrangements specially adapted for submersible motors H02K5/132

Abstract

A well casing extends to ground level and has a pump and a submersible single-phase induction motor therein. The motor has main and start windings connected to a three-lead connector at its upper end and a two-lead connector at its lower end. A capacitor may be mounted below the motor and connected via the two-lead connector, or it may be located at ground level and connected via the three-lead connector.

Claims

1. A submersible single-phase induction motor for operation immersed in water and in either two-wire supply cable installations with a motor capacitor located below the submersible motor or in three-wire supply cable installations with a motor control capacitor located remote from the submersible motor and with or without a motor capacitor below the motor, said motor being internally and permanently wired for two and three wire operation, comprising:

a stator having an annular stator body and upper and lower motor end members on the upper and lower ends of the stator body defining a sealed rotor chamber internally of the annular stator body, a rotor in the rotor chamber having a rotor shaft extending out through said upper end member and having a running seal therewith, said annular stator body including a stator core;

main and start motor windings on the core; and

stator enclosure means enclosing said stator core and main and start windings and sealing the same from the rotor chamber and from the liquid surrounding the motor, a first supply cable disconnect means at the upper end of the motor including first and second and third electrical connector terminals sealed to said stator enclosure means and extending external of the stator enclosure means at the upper end of the stator body, auxiliary disconnect means at the lower end of the motor including fourth and fifth electrical connector terminals sealed to the stator enclosure means and extending external of the stator enclosure means at the lower end of the stator body, said main and start windings each having first and second ends, a common conductor means inside said stator enclosure means electrically connected to said first ends of each the maIn and start windings and to said first electrical connector terminal internally of the stator enclosure means, start conductor means inside said stator enclosure means electrically connected to said second end of the start winding and to each said electrical connector terminal and said fourth electrical connector terminal internally of said stator enclosure means, and main conductor means inside said stator enclosure means electrically connected to said second end of said main winding and to each of said third electrical connector terminal and said fifth electrical connector terminal internally of said stator enclosure means, a second supply cable disconnect means adapted for connection to a twowire or three-wire supply cable and arranged to interfit with said terminals of said first supply cable disconnect means and to seal the same from the fluid surrounding the motor, said auxiliary disconnect means being adapted for connection to a motor capacitor, and means removably connected to the motor for sealing the fourth and fifth connector terminals of the auxiliary disconnect means from the liquid surrounding the motor when the motor is used in installations without a motor capacitor located below the motor.