Publication Date: 2017-Jan-20
The IP.com Prior Art Database
Ikäheimo Jouni: AUTHOR [+3]
The disclosure is related to the housing of an electric motor. At least some, e.g. critical, parts of the motor housing are made of copper or copper alloy, such as aluminium bronze, in order to form an antimicrobial surface on the motor housing or a portion thereof. Alternatively or additionally it is possible to plate some parts or portions of the motor housing with copper or copper alloy to form such an antimicrobial surface even if the part itself is made from some other material.
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This disclosure relates to the housing of an electric motor.
Examples of electric motors include direct current (DC) motors and alternating current
(AC) motors. Examples of AC motors include asynchronous motors and synchronous
motors, for example. However, the following embodiments can be utilized in connection
with any kind of electric motor.
Different applications for electric motors may have different requirements for the
mechanical construction of the electric motor. As an example, the food and beverage
industry typically has special needs for motors it utilizes in its processes. Often a key
requirement for the motor is that it must be able to be kept as bacteria free as possible
and it must withstand e.g. corrosive chemicals or high-pressure washing without
problems. Stainless steel has been the proposed housing material for motors which has
been thought to have the required properties. A problem with stainless steel as a material
is that it may not be hygienic enough without active cleaning thereof.
In order to overcome or at least to alleviate the above problem, it is proposed that at least
some, e.g. critical, parts of the motor housing are made of copper or copper alloy such
as aluminium bronze in order to form an antibacterial surface on the motor housing or a
portion thereof. This can be accomplished by making e.g. a motor frame (i.e. generally
the supporting portion or structure of the housing), motor end shields and generally all
the relevant visible or exposed parts of the motor housing from copper or copper alloy.
Pure copper itself may be too soft for some parts of the motor housing and hence copper
alloy, such as...