Direct current motor condition monitoring and exercising system

Details Direct current motor condition monitoring and exercising system Direct current motor condition monitoring and exercising system

2005-05-17

2005-05-17

Ip, Paul (Department: 2837)

Electricity: motive power systems

Supplied or controlled by space-transmitted electromagnetic...

C318S434000, C701S048000, C701S033000, C239S001000, C239S061000, C417S018000

Reexamination Certificate

active

06894448

ABSTRACT:
Hydraulically actuated aerial lift trucks typically have a primary hydraulic pump system driven by the vehicle's engine and a backup pump system driven by a direct current motor. Due to infrequent use of such motors, they are vulnerable to failure due to corrosion of the brush/commutator interface or seizing of the motor bearings. A remote power unit is provided to periodically run the back up motor for brief periods to maintain the motor in running condition. Voltage levels across the motor terminals are monitored for correspondence to failure indicating levels.

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