|
Encoder Home
Product Literature/Videos
Encoder White Papers
Admotec OEM Components
Mounting Styles
Optical vs. Magnetic
Encoders vs. Resolvers
Update Older Models
Special Applications
Encoder Glossary
Encoder FAQ's
Encoder Competitive Cross Reference
Need an Encoder Fast?
Help Me Choose an Encoder
BC42-BC46-BC66 Brushless Tachometer Upgrade
CONTACT US
E-Mail:
Customer Help Desk
Phone:
(216) 642-4234
Fax:
(216) 642-9743
E-Mail Your Order:
Encoder Order Services
|
Motor Shaft Currents:
FAQ Topics
|
|
| Both AC and DC
motors can create a voltage on the motor shaft, which can flow through
bearings to ground. This motor
shaft current can damage motor or
encoder
bearings. |
White Paper:
 *
Eliminating Motor Shaft Currents through Tachometers and Encoders |
|
Customers may select from one of the
following methods to avoid bearing damage from shaft currents. |
|
Shaft Isolation: |
 |
The
encoder is electrically isolated from the motor shaft, either via
non-conductive shaft or housing or a non-conductive insert. |
| Available models:
HS25A, HS35A,
HS35M, M3,
M4, XP45 |
|
Anti-Rotation
Arm Isolation:
|
|
|
The
encoder is connected to the shaft, but the anti-rotation
arm is electrically isolated from the motor housing. |
|
Available models: AV685,
HS25A, HS35A,
HS35M, M3,
M4,
M6,
M7 |
|
Modular Encoder: |
|
|
The
encoder’s two parts,
magnetic rotor and
stator, are not connected mechanically or
electrically, nor does the encoder have bearings to be damaged. |
Available models:
AV125,
AV850,
AV56, AV67,
AV85,
AV115 |
|
Isolated
Coupling: |
|
|
The
solid shaft
encoder is
coupled to the motor shaft with a
non-conductive
coupling such as the Thomas 50CB Center Insulated. |
| Available models:
AV20, AV25,
AV485,
M3-(1-2),
M4-(1-2) |
|
Shaft Grounding
Kit:
|
|
|
The
encoder is provided with a conductive brush that contacts the
motor shaft and discharges the voltage before it damages the motor or encoder bearings. |
|
Available models:
AV485, AV685,
AV850,
M3,
M4,
AV56, AV67,
AV85,
AV115, M485, M685
|
|
