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US 9,000,640 B2Granted
Electric motor with maximized active motive material
AssigneeZero Motorcycles, Inc.
InventorsRyan John Biffard, Micah Benjamin Bayless
Life of this patent
Estimating the term…
Abstract
An electric motor configured to maximize active motive material within a given motor size by having one or more phase lead exit holes configured to prevent unwanted outside contaminants from entering the motor, phase leads each having an integral strain relief, and two or more Wye terminations that are not electrically connected to each other.
Claims16
A three-phase electric motor comprising:
- a motor casing having an open end with three half-round lead exit holes along an edge of the open end;
- a stator sized to fit within the motor casing, the stator having a multiplicity of inwardly directed radial teeth with wire windings arranged thereon comprising:
- a first set of three stator windings, each winding of the first set of three stator windings having a positive lead and negative lead, and wherein each negative lead of the first set of three stator windings is electrically connected to form a first Wye connection;
- a second set of three stator windings, each winding of the second set of three stator windings having a positive lead and negative lead, and wherein each negative lead of the second set of three stator windings is electrically connected to form a second Wye connection;
- and wherein:
- a first positive lead of the first set of three stator windings is electrically connected to a first positive lead of the second set of three stator windings and to a first lead cable to form a phase A lead;
- a second positive lead of the first set of three stator windings is electrically connected to a second positive lead of the second set of three stator windings and to a second lead cable to form a phase B lead;
- a third positive lead of the first set of three stator windings is electrically connected to a third positive lead of the second set of three stator windings and to a third lead cable to form a phase C lead;
- and wherein each of the phase A lead, the phase B lead and the phase C lead is covered with a separate heat shrink tubing thereby electrically insulating and increasing an overall outside diameter of a portion of each respective lead;
- a rotor having a multiplicity of permanent magnets and sized to fit within the stator;
- and,
- an end plate configured to attach to and cover the open end of the motor casing, an edge of the end plate including three half-round lead exit holes aligned with the three half round lead exit holes along the edge of the open end of the motor casing thereby creating three fully round lead exit holes when the end plate is attached to the motor casing and wherein:
- a first fully round lead exit hole of the three fully round lead exit holes is configured to pass the phase A lead and wherein the first fully round lead exit hole has an inside diameter that is smaller than an outside diameter of the phase A lead with the separate heat shrink tubing;
- a second fully round lead exit hole of the three fully round lead exit holes is configured to pass the phase B lead and wherein the second fully round lead exit hole has an inside diameter that is smaller than an outside diameter of the phase B lead with the separate heat shrink tubing;
- and
- a third fully round lead exit hole of the three fully round lead exit holes is configured to pass the phase C lead and wherein the third fully round lead exit hole has an inside diameter that is smaller than an outside diameter of the phase C lead with the separate heat shrink tubing;
- whereby the three fully round lead exit holes compresses the separate heat shrink tubing of the phase A lead, the phase B lead and the phase C lead when the end plate is attached to the open end of the motor casing thereby preventing unwanted outside contaminants from passing between the phase A lead, the phase B lead and the phase C lead and the three fully round lead exit holes into the electric motor.
14 more elements
A three-phase electric motor comprising:
- a motor casing having an open end with three half-round lead exit holes along an edge of the open end;
- a stator sized to fit within the motor casing, the stator having a multiplicity of wire windings arranged thereon comprising a heat shrink tubing covered phase A lead, a heat shrink tubing covered phase B lead, and a heat shrink tubing covered phase C lead;
- a rotor having a multiplicity of permanent magnets and sized to fit within the stator;
- and
- an end plate configured to attach to and cover the open end of the motor casing, an edge of the end plate including three half-round lead exit holes aligned with the three half round lead exit holes along the edge of the open end of the motor casing thereby creating three fully round lead exit holes when the end plate is attached to the motor casing and wherein:
- a first fully round lead exit hole of the three fully round lead exit holes is configured to pass the heat shrink tubing covered phase A lead and wherein the first fully round lead exit hole has an inside diameter that is smaller than an outside diameter of the heat shrink tubing covered phase A lead;
- a second fully round lead exit hole of the three fully round lead exit holes is configured to pass the heat shrink tubing covered phase B lead and wherein the second fully round lead exit hole has an inside diameter that is smaller than an outside diameter of the heat shrink tubing covered phase B lead;
- and
- a third fully round lead exit hole of the three fully round lead exit holes is configured to pass the heat shrink tubing covered phase C lead and wherein the third fully round lead exit hole has an inside diameter that is smaller than an outside diameter of the heat shrink tubing covered phase C lead;
- whereby the three fully round lead exit holes compress the heat shrink tubing covered phase A lead, the heat shrink tubing covered phase B lead and the heat shrink tubing covered phase C lead when the end plate is attached to the open end of the motor casing thereby preventing unwanted outside contaminants from passing between the heat shrink tubing covered phase A lead, the heat shrink tubing covered phase B lead and the heat shrink tubing covered phase C lead and the three fully round lead exit holes into the electric motor.
7 more elements
Dependencies are inferred from the claim text.