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Surgical instrument motor with increased wire count per phase set and increased fill factor and corresponding method of manufacture

A technology of surgical instruments and filling factors, which is applied in the direction of surgery, manufacture of motor generators, shape/style/structure of winding conductors, etc., and can solve problems such as limiting motor mechanical power, torque and speed loss

Active Publication Date: 2020-06-19
MEDTRONIC INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

During this transition, losses occur that limit the mechanical power, torque and speed of the motor

Method used

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  • Surgical instrument motor with increased wire count per phase set and increased fill factor and corresponding method of manufacture
  • Surgical instrument motor with increased wire count per phase set and increased fill factor and corresponding method of manufacture
  • Surgical instrument motor with increased wire count per phase set and increased fill factor and corresponding method of manufacture

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Embodiment Construction

[0036] Surgical instruments including brushless sensorless DC motors are disclosed below. Brushless sensorless DC motors have increased power output and / or torque, reduced current losses (including eddy current losses), reduced coil resistance, increased fill factor (or coil slot fill level) and reduced heat generation. These features are provided without increasing the overall external size of the brushless sensorless DC motor. These features are provided while reducing the number of stator support components and thus simplifying the interior of the motor housing. Exemplary methods for fabricating a brushless sensorless DC motor are also disclosed.

[0037] figure 1 A surgical instrument 10 is shown incorporating a brushless sensorless DC motor 12 (hereinafter "motor"). Surgical instrument 10 includes a motor housing 14 that includes motor 12 . Examples of motor 12 are at least Figure 4 shown in . Surgical instrument 10 may be used, for example, to mill, drill, shape,...

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Abstract

A motor for a surgical instrument includes a rotor and a stator. The rotor includes a shaft and magnets. The stator includes (i) a cavity in which the rotor is disposed, and (ii) a coil assembly. The coil assembly includes multiple phase sets. A phase set includes a plurality of line sets. Each of the phase sets includes a plurality of coils and corresponds to a respective one of the line sets. The coils in each of the phase sets are at respective locations around the rotor. One of the sets of threads includes at least three threads. The stator causes the rotor to axially rotate a surgical tool of the surgical instrument based on current received at the wire set.

Description

technical field [0001] The present disclosure relates to electric motors for hand-held surgical instruments. Background technique [0002] The background description provided herein is for the purpose of generally presenting the context of the disclosure. The work of the presently named inventors is neither expressly nor implicitly admitted to the extent that it is described in this Background section and to the extent that its description would not otherwise be considered prior art at the time of filing prior art for this disclosure. [0003] Handheld surgical instruments can have various parameter requirements including weight, power, size, current draw, and heat generation requirements. Due to the relationship between these parameters, it may be difficult to produce a handheld surgical instrument with reduced weight, increased power output and / or torque, reduced size, reduced current consumption, and reduced heat generation. For example, as the power output of a motor ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02K3/04H02K3/47H02K3/28H02K15/04A61B17/00
CPCA61B17/00H02K3/04H02K3/28H02K3/47H02K15/0435H02K2213/03H02K15/0442A61B2017/00398Y10T29/49009
Inventor M·K·鲁尔迪V·A·葛瑞蒂T·A·比勒尔C·R·克什兰
Owner MEDTRONIC INC